Drill-Stem-valves

1-800-999-1601
TOLL FREE IN THE U.S.A. AND CANADA
http://www.hydril.com
Headquarters
Hydril Company
P.O. Box 60458 ▼ Houston, TX 77205-0458
3300 N. Sam Houston Parkway East ▼ Houston, TX 77032-3411
Telephone: (281) 449-2000 ▼ Fax: (281) 985-3353
Drill Stem Valves
KELLYGUARD™ DRILL STEM VALVES • CHECKGUARD® VALVES
CATALOG DSV 2003 (REPLACES CATALOG PC 9701A)
For a Hydril Sales, Service or Manufacturing location nearest you,
please check our website at www.hydril.com/locations
R
2M GRAPH 10/03
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KELLYGUARD™ VALVES
OF
CONTENTS
KELLYGUARD VALVES
Standard Model and NACE Trim ................................2
Operational Advantages and ....................................4
Durable Components
Kellyguard Valve Features ..........................................5
KELLYGUARD DRILL STEM VALVES
Engineering Data........................................................6
Application Data ........................................................7
Parts List ....................................................................8
Detail View of Parts ....................................................9
Assembly Procedure ................................................10
Maintenance and Testing..........................................11
CHECKGUARD VALVES
Applications and Operations ....................................12
Offshore Application ................................................13
Checkguard Valve Selection ....................................14
Features....................................................................16
Assembly Parts ........................................................17
Maintenance ............................................................18
Rubber Goods Storage for ......................................19
Checkguard and Kellyguard Valves
Standard Model and NACE
Trim Kellyguard Valves
Rubber Goods Storage for Checkguard
and Kellyguard Valves
Hydril’s Kellyguard is a drill stem valve. Drill stem
valves facilitate well control and prevent mud spillage.
Hydril produces Kellyguard valves to service both the
traditional and top drive drilling applications. For
traditional applications, they are attached above and
below the kelly to close the bore to upward flow from
the well, or downward flow while making a connection.
For top drive applications, Hydril specializes in dual
crank actuator driven valves.
The term rubber goods includes synthetic compounds, such as Nitrile Copolymers and Neoprene, as well as
natural rubber parts.
The ideal storage situation for rubber goods would be in vacuum-sealed containers maintained in a cool, dry, dark
storage area. Atmosphere, light, and heat accelerate deterioration of rubber goods. The term aging means
cumulative effects of all three attacking agents over a period of time. The rubber goods are also affected by
stretching or bending from normal shape, extreme cold, or chemical reactions with solvents and petroleum
products.
The following recommendations will allow vendors and users of oil field equipment to maximize normally available
storage facilities for rubber goods.
Upper Kellyguard valves are well suited for high flow
rates, low to high-pressure sealing, and high tensile
loads imposed upon upper kelly cocks. The upper
Kellyguard valve has left hand-threaded connections,
compatible with the swivel and upper kelly connections.
The upper Kellyguard valve is used to close the bore if
the drill string becomes stuck with the kelly in the rotary
table.
1. Keep the rubber storage area as dark as possible
– preferably indoors, not outdoors, and away from
direct sunlight, skylights, windows, and direct
artificial lighting. The ultraviolet content of the light
spectrum accelerates cracking.
2. Select a cool location (ideally below 90°F) that is
away from heaters, stoves and direct blasts of
space heaters. Heat causes a gradual hardening of
rubber goods. The process is greatly accelerated
when ozone or oxygen is present. In extremely cold
climates, some rubber goods become so brittle
they will shatter when dropped or handled roughly.
3. Keep rubber goods away from electrical machinery
(motors, switch gear, or any high voltage
equipment producing corona). Avoid locations
susceptible to drafts that will carry the atmosphere
from electrical machinery to the rubber goods
storage area.
Exposure to the atmosphere allows ozone (O3), a
very active form of oxygen, to react with and be
especially detrimental to rubber goods. Two
principal sources of ozone are (1) atmospheric
ozone, and (2) ozone created by electrical
discharges such as lighting, high voltage corona,
and electrical machinery. Points of strain in rubber
goods attacked by ozone are characterized by a
hard skin, which eventually crazes into small
cracks and may turn chalky or assume a bark-like
appearance.
4. The practice of first-in, first-out inventory
management is essential with rubber goods.
5. Store rubber goods in a relaxed position in their
normal shape. Stretching or bending rubber goods
will result in accelerated aging or cracking. For
example, do not hang o-rings on pegs, glands,
BOP testers, or operator parts. Periodically inspect
to detect aging signs and treat the rubber goods
that must be stored in a stretched attitude with age
resistant compounds.
6. Rubber goods storage areas should be kept as dry
as possible. Remove oil, grease or other foreign
materials from the storage area to preclude
spillage on rubber goods. Rubber goods, both
Lower Kellyguard valves are rated for the rugged
applications of lower kelly cocks, including low and
high-pressure sealing, high tensile strength, and high
torsional strength. They have right hand threaded
connections to mate with the lower kelly end and with
drill pipe tool joints. The lower Kellyguard valve is
positioned below the kelly to close the drill stem bore to
hold a kick while preparing to circulate the kick out. It
can also be used as a mud saver.
Mud saver is the term applied to a lower Kellyguard
valve when it is used to save drilling fluid during a
connection. It saves mud costs and improves safety by
reducing slippery mud on the rig floor.
Drill pipe safety valves are lower Kellyguard valves
with connections to mate with the drill pipe tool joint.
Ratings are the same as lower Kellyguard valves. The
valve assists stabbing operations due to its low
operating torque for easy closing of the valve. When
required, the open valve is stabbed onto the top tool
joint, made-up, and manually closed. It is stored in the
open position on the rig floor.
© 2003 Hydril Company LP All Rights Reserved.
2
Seals
The Kellyguard valve is designed for 10,000 or 15,000
psi working pressure. It is tested at the factory to
15,000 or 22,500 psi. Hydril has selected high quality
materials and dimensional fits to ensure greatest
reliability. Each valve has three elastomeric sealing
areas: between each seat and body, between crank
and sleeve and between sleeve and body. The seat
7.
A)
B)
C)
D)
natural and synthetic, possess some degree of
susceptibility to deterioration from various solvents,
especially oil field liquid hydrocarbons, which
cause swelling/shrinkage.
If storage for extended periods is anticipated,
sealed containers are recommended. Impervious
surface coverings are recommended. Impervious
surface coverings such as waxing will increase
shelf life.
Since the aging of a rubber product is dependent
upon all of the above factors plus its size, specific
composition, and function, no precise figure is
available for "storage life." Generally, the greater
the ratio of surface area to volume, the more
susceptible a part is to being rendered useless by
aging. For example, a relatively large part (by
volume), such as a packing unit, might be expected
to have a much longer useful shelf life than a large
diameter O-ring.
No general rule can be drawn regarding usability. A
large, heavy part might suffer the same total
amount of aging as a small, light piece and still be
useful, whereas the light piece would be rendered
useless. Thus, judgment becomes the rule and
where there is doubt, replace the part.
Prior to using rubber goods that have been stored
for periods of time, these checks should be made:
Is there "chalking" or "barking"?
Has the part developed a "hard skin"?
Do cracks appear? (Sometimes cracks will be
obvious; stretch or bend the part in question so that
any incipient cracks or very thin cracks will be
revealed.)
Will a suspect part pass a hardness test? (In the
event that the hardness runs 15 points higher than
the normal hardness of the part, it is considered
non-usable.) Note: Hardness is affected by temperature, and readings should be taken with the
rubber part at 70°F.
19
RUBBER GOODS STORAGE
TABLE
CHECKGUARD® VALVES
PACKER REPLACEMENT (1F)
1. Remove retainer ring (1I) and two retaining screws
(1M) from valve body (1C).
2. Slide lower portion of valve from valve body.
3. Remove outer backup ring (1H), inner backup ring
(1G), and packer (1F).
4. Check metal parts for damage. If in good condition,
install new packer (1F) with square shouldered end
down (toward ball). Do not oil or grease packer.
5. Install inner and outer backup rings (1H and 1G).
6. Slide lower portion of valve into valve body by
hand. Install two retaining screws (1M) into valve
body (1C). Ensure that screws are fully seated in
groove on outside of ball seat (1B).
7. Install retainer ring (1I) over two retaining screws
(1M) so that ring fits into slots on screws.
VALVE REPLACEMENT (1N)
1. Remove set screw (1N) from ball cage (1A).
2. Unscrew and remove ball cage (1A) from ball seat
(1B).
3. Remove ball (1L) and ball spring (1K).
4. Inspect ball seat to ensure good sealing surface.
Repair if not smooth before replacing ball and
spring.
5. Replace and tighten ball cage onto ball seat.
6. Install set screw (1N) into ball cage (1A).
Ensure that screw is fully seated in groove on
ball seat (1B).
7. Lubricate surfaces with light grease.
8. Install the O-ring (8) and back up rings (9) in the
ring groove in the sub body.
9. Install the O-ring (7) into the landing sleeve (3)
10. Install the landing sleeve (3).
11. Install the upper split ring (4) into the sub body (2).
12. Install the retainer ring (5) and the retaining ring (6)
into the upper split ring (4).
CHECKGUARD VALVE STORAGE
At the conclusion of each well or prior to placing the
valve in storage for even a brief period, it is
recommended that the Checkguard valve be
disassembled, cleaned, inspected, lubricated thoroughly with non-petroleum base oil such as castor oil
or silicon oil, and reassemble. Do not lubricate packer.
Replacement of worn packer, seal rings and other
parts can be made conveniently at this time.
seals are O-rings with backup rings on each side.
The crank seal is a "T" with backup rings on each
side. The sleeve seal is an O-ring with backup rings
on each side.
use of chemical sulfide scavengers, and 3) use of a
drilling fluid in which oil is the continuous phase."
This configuration is designed for operating
pressures of 10,000 or 15,000 psi.
The standard Kellyguard valve is intended for
normal drilling environments and those described
in NACE MR0175, section 11, which states: "The
drilling environment is controlled by maintaining
drilling fluid hydrostatic head and fluid density to
minimize formation fluid in-flow and by the use of one
or more of the following: 1) Maintenance of pH 10 or
higher to neutralize H2S in the drilled formation, 2)
The NACE Trim Kellyguard valve is intended for
normal and corrosive drilling environments and
limited exposure to H2S. The limiting factors for H2S
exposure includes H2S concentration, pH, time, and
temperature. This configuration uses a standard
Kellyguard valve body and NACE compliant internal
parts and is rated for 10,000 psi operating pressure.
6
1D
5
1E
4
1J
3
7
SLIP DISASSEMBLY / ASSEMBLY (1E)
1. Unscrew and remove slip nut (1D) from valve body (1C).
2. Remove slip (1E) and slip spring (1J).
3. Clean and inspect disassembled parts. Replace
any parts that are worn or damaged.
4. Lubricate surfaces with light grease.
5. Install slip spring (1J) and slip (1E).
6. Install slip nut (1D).
8
1M
1M
1I
1H
1G
1F
LANDING SUB DISASSEMBLY/ ASSEMBLY (2-9)
1. Remove the retaining ring (6) and the retainer ring
(5) from the upper split ring (4).
2. Remove the upper split ring (4) from the sub body (2).
3. Remove the landing sleeve (3).
4. Remove the O-ring (7) from the landing sleeve.
5. Remove the O-ring (8) and back up rings (9) from
the sub body.
6. Clean and inspect disassembled parts that are
worn or damaged.
18
9
1C
2
1B
Retrieving
Tool
1L
1K
1N
1A
Cutaway View
These are cutaway views of the valve in the closed position. Hydril
offers Kellyguard: standard and NACE Trim models. In the Hydril
NACE Trim, the internal parts only are NACE compatible.
Contact your Hydril representative for more information regarding Hydril Kellyguard
valves suitable for H2S sour gas service.
3
KELLYGUARD™ VALVES
Standard Model and NACE Trim
Kellyguard Valves
Checkguard Valve Maintenance
KELLYGUARD™ VALVES
Hydril designed and developed the
original one piece Kellyguard valve
to fit the full range of kelly valve
applications, and set the standard
for the industry. The Kellyguard
valve can serve as an upper kelly
cock, top drive kelly cock, lower
kelly cock, drill pipe safety valve,
and mud saver. Minimum torque is
needed to open the valve.
Pressure Balancing Allows Easy
Opening. The Kellyguard valve is
easily opened, even while sealing
pressure. Operating torque is
minimized by balancing pressures,
above and below the ball. Pressure
applied to the top of the ball
equalizes well pressure acting on
the ball from below. Because the ball
is floating, the downward pressure
acting on it reduces the friction
between the ball and the seat. This
reduction in friction decreases the
torque required to rotate the ball,
and thus allow opening of the valve.
Abrasion-Resistant
Metal-toMetal Seals are Effective in Low
or High Pressure. The sealing
surfaces on the ball and seats are
metal-to-metal providing reliable
sealing from low to high pressure.
Designed for Demands of Modern
Applications: Stainless Steel,
Interchangeable
Parts,
Easy
Maintenance, Long Service Life.
Kellyguard valves require little
maintenance. They have few operating parts, allowing
easy repair. No lubrication is necessary except during
assembly. All internal parts are stainless steel for
corrosion resistance and long service life. They are
precisely manufactured for interchangeability, allowing
easy fitting of parts during assembly or repair. For
traditional applications, Kellyguard valves are
manufactured with enough length on each end to recut the connection in case of damaged threads or
shoulders. The box and pin connections are cared for
as any tool joint with periodic inspections.
Stainless steel ball and seats provide
metal-to-metal sealing to ensure pressure
integrity under a wide range of operating
conditions.
10,000 or 15,000 psi Protection
Kellyguard valves have a one piece
compact body for easy handling
and provide protection from 10,000 or 15,000 psi. For
maximum safety, Hydril tests all bodies at 1 1/2 times
rated working pressure.
Checkguard Valve Assembly Parts
1D
ITEM
DESCRIPTION
QTY
NO. 27
NO. 35
NO. 43
NO. 48
1A
CAGE, BALL
1
3132109
3132108
3132107
3131853
***1B
SEAT, BALL
1
3127085
3126408
3126450
3127110
1C
BODY
1
3126367
3125115
3126588
3127112
1D
NUT
1
3127090
3125116
3126586
3127113
1E
SLIP
1
3127036
3125117
3126587
3127052
***1F
PACKER
1
3126334
3125118
3126397
3126563
***1G
BACKUP RING, INNER
1
3127092
3126560
3126590
3127114
***1H
BACKUP RING, OUTER
1
3127093
3126561
3126589
3127115
1I
RETAINING RING
1
3126579-2
3126579-3
3126579-4
3126579-5
1J
SPRING, UPPER
1
3126660
3126516
3126518
3126520
***1K
SPRING, VALVE
1
3126515
3126517
3126519
3126521
***1L
BALL
1
1900754-2
1900754-3
1900754-4
1900754-5
1M
RETAINING SCREW
2
3125122-2
3125122-3
3125122-3
3125122-3
1N
SET SCREW
1
1900755-0603
1900755-0604
1900755-0604
1900755-0604
3133165
3133166
3133167
3133168
4
1J
1C
1M
REPAIR KIT
1M
1I
1H
1F
1G
1B
1L
1K
1N
1A
***Included in Repair Kit
6
5
LANDING SUB ASSEMBLY
4
ITEM
DESCRIPTION
QTY
2
SUB BODY
1
LANDING SLEEVE
SPLIT RING
**3
5
Open and close positions are clearly indicated on all models. A
stop mechanism ensures full 90 degrees rotation for full opening
and closing. Proper positioning of the ball provides excellent
performance and a long service life. Minimum torque is needed to
open the valve because of the pressure balancing function.
1E
CHECK VALVE ASSEMBLY
4
Hydril manufacturing
procedures meet the highest
international standards of quality.
Hydril's 9001 Certificate attests
to its commitment to quality.
CHECKGUARD® VALVES
Operational Advantages and Durable Components
Result in Low Cost of Ownership
NO. 27
NO. 35
NO. 43
NO. 48
1
3127095
3125119
3126392
3127117
1
3131099
3131101
3131103
3131105
3
RING RETAINER
1
3131150
3131152
3131154
3131156
**6
RING RETAINER-SPIRAL
1
1920003-231
1900149-148
1900149-159
1900149-161
*7
QUAD RING
1
1921173-230
1921173-234
1921173-240
1921173-244
*8
O RING
1
1900004-233
1900004-340
1900004-346
1900004-349
*9
BACKUP RING
2
1920069-233
1920069-340
1920069-346
1920069-349
**
SEAL KIT
3133149
3133148
3133147
3126357-SK
REPAIR KIT
3133152
3133151
3133150
3126357-RK
7
8
9
2
*Included in Seal Kit
**Included in Repair Kit
RETRIEVAL TOOL (Not shown in this illustration)
ITEM
DESCRIPTION
QTY
NO. 27
NO. 35
NO. 43
NO. 48
RETRIEVAL TOOL
1
1007225
1007425
1004625
1007725
17
CHECKGUARD® VALVES
Checkguard is a drop-in check valve for the drill string.
The check valve remains top side until needed and is
retrievable by wire line. It provides the driller a means to
control the drill pipe pressure when required. The check
valve prevents upward flow through the drill pipe, but
allows fluid to be pumped downward to circulate the
well.
15,000 psi Working Pressure
Checkguard seals up to 15,000 psi working pressure;
yet it is lightweight and easily handled.
Maximized Flow Area
Downward flow areas are maximized, allowing high flow
capacity and long life.
Installed As Needed
The check valve remains on the drill floor until it is
needed. Many downhole valves are part of the drill
string and are constantly subject to abrasive wear. This
Kellyguard Valve Features
wear results in frequent replacement of valves and can
prevent valve closure when needed. Checkguard is not
exposed to premature deterioration. Only the landing
sub is installed as the drill string is run. When control is
needed, the check valve is pumped down the drill string
where it latches automatically in the landing sub.
Wire Line Retrieved
Since the check valve can be wire line retrieved, it
eliminates the need to trip the drill string for retrieval. Yet
retrieval can also be accomplished after tripping out the
drill string.
Positive Closure
Traveling down the drill string, the check valve lands on
the landing sub sleeve and latches positively into place.
The replaceable landing sleeve has recessed areas into
which the check valve packer seals. Upward pressure is
contained by the packer and ball.
KELLYGUARD™ VALVES
Checkguard Features
Well pressure creates primary
seal. The primary seal is
produced by forcing the ball
against the upper seat. Sealing
is efficient in high or low
pressure. Under low pressure,
the spring-loaded lower seat
creates initial sealing. High
pressure forces the ball against
the upper seat.
Quality control measures are exacting. Here, the
stainless steel ball is prepared for inspection. The
precise shape of the ball is recorded using a Talyrond
inspection device. Each and every ball is inspected for
size, finish, and sphericity.
Pressure balancing. With a
closed valve containing well
pressure from below, pressure
applied from above equalizes
the force on the ball. This
pressure balancing significantly
reduces
operating
torque
necessary to open the valve,
even at high pressure.
Kellyguard valves feature a replaceable operating
crank sleeve. This sleeve protects the body from
unnecessary wear to extend life and reduce costs. The
crank operates inside the sleeve and is coated to
reduce friction. The coating decreases torque and wear
between the bearing surfaces. The sleeve also has a
positive stop mechanism so the crank turns 90 degrees
for full opening and closing. Operation is easy with the
hex-operating wrench.
Ball
T-shaped seal and
backup rings provide
a pressure seal and
minimize rotational
friction.
Downward pressure seal for
mud saver. Pressure from
above acts on the ball forcing it
against the lower seat to provide
a reliable seal.
Landing sub in
drill string. check
valve is stored
top side.
16
Check valve has
landed in the sub.
it is allowing
circulation of
drilling fluid.
The check valve
has landed and
latched in the sub
and is containing
well pressure. The
ball closes
against upward
pressure.
O-ring seal and backup rings provide a
seal between the
body and sleeve.
Coupler
Operating Crank
Crank Dog
Sleeve
The retrieving
tool is unlatching
and lifting the
check valve.
Open Position
Closed Position
5
KELLYGUARD™ DRILL STEM VALVES
Valve
Size
inches
6
ID
inches
Weight
Hex
Wrench
lbs.
inches
Connection
OD
Length
inches
inches
Checkguard Valve Selection
10,000 psi
10,000 psi NACE Trim
15,000 psi
Part Number
Part Number
Part Number
3
1 3/4
53
1/2
NC31 (2 7/8 IF)
4.25
16.50
3132183-1
3132185-1
3132184-1
3
1 3/4
69
1/2
NC38 (3 1/2 IF)
4.25
16.06
3132183-2
3132185-2
3132184-2
3
1 3/4
59
1/2
3 1/2 EUE 8R
4.25
15.50
3132183-3
3132185-3
3132184-3
3
1 3/4
59
1/2
2 7/8 EUE 8R
4.25
16.60
3132183-4
3132185-4
3132184-4
3
1 3/4
69
1/2
WT38
4.75
16.50
3132183-5
3132185-5
3132184-5
3
1 3/4
1/2
NC38 (3 1/2 IF)
4.75
25.00
3132183-6
3132185-6
3132184-6
3
1 3/4
3 1/2
2 1/4
80
1/2
XT39
5.00
15.51
5/8
NC38 (3 1/2 IF)
5.38
18.06
15,000 psi NACE TRIM CHECKGUARD
ASSEMBLY (VALVE, SUB & TOOL)
CHK
L-SUB END
ASSEMBLY
NO.
CONNECTION
PART NO.
O.D.
inches
BORE
inches
WT
lbs.
#27
1 11/16
5/8
5
#35
3132174-1
LANDING SUB
RETRIEVAL TOOL
PART NO.
O.D.
inches
BORE
inches
LENGTH
inches
WT
lbs.
PART NO.
WT
PART NO.
3126348
4 1/8
1 5/8
36
105
3126354-1
8
1007225
14
1007425
21
1004625
28
1007725
NC 31 (2 7/8 IF)
3126321-01
NC 38 (3 1/2 IF)
3126321-02
4 3/4
3126354-2
WT 38
3126321-03
5 1/8
3126354-3
XT 39
3126321-04
5
3126354-4
NC 38 (3 1/2 IF)
3126322-01
2 3/16
7/8
13
3126349
4 3/4
2 1/8
36
120
3126355-1
4 1/2 FH
3126322-02
6
3126355-2
NC 46 (IF)
3126322-03
6 1/4
3126355-3
NC 50 (4 1/2 IF)
3126322-04
6 3/8
3126355-4
3132173-1
4 1/2 RRH
3126322-05
5 3/4
3126355-5
4 1/2 RRHBXB
3126322-06
5 3/4
3126355-6
3 1/2 EUE
3126322-07
5
3126355-10
3132184-7
3132172-1
CHECK VALVE
3 1/2
2 1/4
115
5/8
4 1/2 FH
6.13
18.06
3132172-2
3132174-2
3132173-2
3 1/2
2 1/4
135
5/8
NC50 (4 1/2 IF)
6.38
17.56
3132172-3
3132174-3
3132173-3
3 1/2
2 1/4
120
5/8
NC46 (4 IF)
6.13
17.56
3132172-4
3132174-4
3132173-4
3 1/2
2 1/4
115
5/8
4 1/2 REG LH
6.13
17.82
3132172-5
3132174-5
3 1/2
2 1/4
80
5/8
NC40 (4" FH)
5.38
17.56
3132172-6
3132174-6
3 1/2
2 1/4
5/8
NC38 SHORT
5.38
15.50
3132172-9
3132174-11
4 1/2 NVAM
3126322-09
5
3126355-12
WT40
3126322-15
5 1/2
3126355-15
3132173-5
WT40 box x XT39 pin
3126322-16
5 3/8
3126355-16
3132173-6
WT40 box x HT38 pin
3126322-17
5 1/4
3126357-17
#43
NC 50 (4 1/2 IF)
3126323-01
NC 50 (4 1/2 IF)
3126323-02
2 11/16
1 3/8
18
3126350
6 1/8
6 1/4
2 5/8
36
230
3126356-1
3126356-2
NC 50 (4 1/2 IF)
3126323-03
6 3/8
3126356-3
3 1/2
2 1/4
5/8
WT 40
5.38
18.06
3132173-14
3 1/2
2 1/4
5/8
DS50
6.38
17.56
3132173-11
NC 50 (4 1/2 IF)
3126323-04
6 1/2
3126356-4
NC 46 (4 IF)
3126323-05
6 1/8
3126356-5
NC 46 (4 IF)
3126323-06
6 1/4
3126356-6
NC 46 (4 IF)
3126323-07
6 3/8
3126356-7
NC 46 (4 IF)
3126323-08
6 1/2
3126356-8
5 1/2 FH
3126323-10
7
3126356-10
4 1/4
2 13/16
130
7/8
NC46 (4 IF)
6.63
20.06
3132166-1
3132168-1
3132163-1
4 1/4
2 13/16
134
7/8
NC50 (4 1/2 IF)
6.63
20.06
3132166-2
3132168-2
3132163-2
4 1/4
2 13/16
228
7/8
5 1/2 IF
7.75
19.56
3132166-3
3132168-3
3132163-3
4 1/4
2 13/16
215
7/8
6 5/8 REG LH
7.75
19.56
3132166-4
3132168-4
3132163-4
4 1/4
2 13/16
117
7/8
NC50 SHORT
6.63
15.75
3132166-5
3132168-5
3132163-5
4 1/4
2 13/16
7/8
NC50 LONG
6.63
33.06
3132166-6
3132168-6
3132163-6
4 1/4
2 13/16
7/8
HT55 (400)
7.00
20.06
3133038
5 1/4
3 1/16
180
7/8
NC50 RH
7.38
20.06
3132169-1
3132171-1
3132170-1
5 1/4
3 1/16
192
7/8
5 1/2 FH
7.38
19.56
3132169-2
3132171-2
3132170-2
5 1/4
3 1/16
188
7/8
NC56
7.38
19.56
3132169-3
3132171-3
3132170-3
NC 50 (4 1/2 IF)
#48
NC 50 (4 1/2 IF)
3126323-19
3126324-01
6 5/8
3
1 11/16
23
3126351
6 3/8
3126356-19
2 15/16
36
220
3126357-1
5 1/2 FH
3126324-02
7
3126357-2
6 5/8 RRH
3126324-03
7 3/4
3126357-3
6 5/8 RRH BXB
3126324-04
7 3/4
3126357-4
6 5/8 FH
3126324-05
8
3126357-5
6 5/8 RRH
3126324-06
8
3126357-6
NC 50 (4 1/2 IF)
3126324-08
6 5/8
3126357-8
6 5/8 FH
3126324-11
8 1/4
3126357-11
5 1/4
3 1/16
218
7/8
5 1/2 IF
7.75
19.56
3132169-4
3132171-4
3132170-4
5 1/4
3 1/16
218
7/8
6 5/8 REG LH
7.75
19.56
3132169-5
3132171-5
3132170-5
6 5/8 FH
3126324-12
8 1/2
3126357-12
5 1/4
3 1/16
7/8
6 5/8 REG RH
7.88
19.56
3132169-6
3132171-6
3132170-6
WT 56
3126324-14
7 3/4
3126357-14
5 1/4
3 1/16
140
7/8
6 5/8 REG RH
SHORT
7.38
15.81
3132169-7
3132171-7
3132170-7
XT57
3126324-16
8
3126357-16
WT50 box X HT55 pin
3126324-19
7 1/8
3126357-19
5 1/4
3 1/16
205
7/8
6 5/8 FH
8.00
19.56
3132169-8
XT57
3126324-20
7 3/8
3126357-20
XT57 box X HT55 pin
3126324-21
7
3126357-21
5 1/4
3 1/16
5 1/4
5 1/4
270
7/8
7 5/8 REG RH
8.63
16.56
3132169-9
3132170-10
3 1/16
7/8
5 1/2 FH DSTJ
pin X WT50 box
7.38
19.56
3132170-14
To Select correct Checkguard valve determine:
3 1/16
7/8
XT57
7.38
16.25
3132170-15
1. Smallest bore in drill string through which the check valve must pass. 2. Landing sub connection size and type.
3. Outside diameter of mating tool joints.
15
CHECKGUARD® VALVES
Kellyguard Sizes Engineering Data
CHECKGUARD® VALVES
Kellyguard Application Data
MAKE-UP TORQUE FOR
KELLYGUARD CONNECTION
Landing Sub
After the correct
size check valve
is determined,
choose a matching
landing sub. Select
a landing sub
with threaded
connections and
outside diameter
compatible with the
mating tool joints of
the drill string.
Retrieving
Tool
Fitted with
a 5/8 API
sucker rod
connection
(15/16-10
UNS) for
connection
to wireline.
Check Valve
Use the largest size
check valve that can
pass through the drill
string to the landing
sub to provide the
largest flow area for
circulation. Determine
the smallest inside
diameter through which
the check valve must
pass. Verify kelly, lower
kelly valve, tool joints,
and sometimes drill
collars. The check valve
OD must be at least
1/16 inch smaller than
this inside diameter.
Once smallest bore
is determined, read
across table for
correct valve size.
CONNECTION
3
NC 31 (2 7/8 API IF)
5,900
8,700
NC 38 (3 1/2 API IF)
9,100
17,000
4 1/4
5 1/4
NC 38 (3 1/2 API IF)
4-1/4" – 10,000 PSI
W.P. KELLYGUARD* VALVE
MAXIMUM
MAKE-UP MAKE-UP
TORQUE TORQUE
(FT.-LBS)* (FT.-LBS)**
VALVE
SIZE
(IN.)
3 1/2
KELLYGUARD™ DRILL STEM VALVES
Checkguard Valve Selection
9,100
13,200
NC 46 (4 API IF)
17,000
28,900
4 1/2 FH
17,400
26,200
NC 50 (4 1/2 API IF)
18,900
39,300
4 1/2 API REG LH
20,300
22,700
NC 46 (4 API IF)
17,000
26,900
NC 50 (4 1/2 API IF)
18,900
34,100
6 5/8 API REG LH
41,700
56,700
NC 50 (4 1/2 API IF)
18,900
32,700
5 1/2 FH
28,000
47,800
6 5/8 API REG LH
41,700
54,000
**The Torque values listed are
upper limits not to be exceeded.
The correct make-up torque for
a specific Kellyguard/Drill pipe
connection will be the make-up
torque recommended in API
Spec RP 7G for the Drill Pipe/Tool
Joint combination or the value
listed above, which ever is lower.
The graph represents torque as a function of pressure.
The line identified as (A) depicts torque required to open the
valve with 0 pressure above the ball. Although this is
infrequently done, it is of interest when compared to other
manufacturer’s valves. Line (B) depicts the balance condition,
i.e. pressure above and below ball are approximately equal.
Note the reduction in torque requirement.
*Graphs for other size and Kellyguard valves are similar.
INTERCHANGEABILITY OF ROTARY SHOULDER
CONNECTIONS
API
CONNECTION
NC26
NC31
NC38
INTERNAL FLUSH
2 3/8
2 7/8
3 1/2
FULL HOLE
NC46
NC50
4
4 1/2
4 1/2
5
4
4 1/2
4
EXTRA HOLE
3 1/2
WIDE OPEN
SLIM HOLE
NC40
3 1/2
2 7/8
3 1/2
4
4 1/2
Most Hydril Kellyguard end connections can be re-cut. Contact your
Hydril representative for more information.
Hex Wrench Size,
across flats
14
7
KELLYGUARD™ DRILL STEM VALVES
Checkguard Valve Offshore Application
Valve Item No. Qty.
Size
Part Name
10M
10M NACE
15M
1
2
3
4
5
6
7
8
9
10
11
12
1*
1*
1*
1
1
1
1
1
1
1*
1*
1*
Lower Seat
Ball
Upper Seat
Crank
Sleeve
Lower Split Ring
Upper Split Ring
Retainer Ring
Spiral Retainer Ring
Seal Kit
Lower Seat Spring
Coupler
Repair Kit
3132111
1007483
3132085
3131113
3131096
3131059
3131098
3131149
1920003-231
1007482
1004295-5
3131175
3132370
3132155
3132231
3132159
3131118
3131169
3131060
3131099
3131150
1920003-231
1007178
1007685-3
3131176
3132179
3132111
1007483
3132085
3131113
3131096
3131059
3131098
3131149
1920003-231
1007482
1004295-5
3131175
3132370
1
2
3
4
5
6
7
8
9
10
11
12
1*
1*
1*
1
1
1
1
1
1
1*
1*
1*
Lower Seat
Ball
Upper Seat
Crank
Sleeve
Lower Split Ring
Upper Split Ring
Retainer Ring
Spiral Retainer Ring
Seal Kit
Lower Seat Spring
Coupler
Repair Kit
3132113
1004583
3132088
3131111
3131094
3131061
3131100
3131151
1920003-287
1006889
1004295-3
3131173
3132371
3132156
3132232
3132160
3131117
3131095
3131062
3131101
3131152
1920003-287
1007278
1007685-2
3131172
3132180
3132113
1004583
3132088
3131111
3131094
3131061
3131100
3131151
1920003-287
1006889
1004295-3
3131173
3132371
1
2
3
4
5
6
7
8
9
10
11
12
1*
1*
1*
1
1
1
1
1
1
1*
1*
1*
Lower Seat
Ball
Upper Seat
Crank
Sleeve
Lower Split Ring
Upper Split Ring
Retainer Ring
Spiral Retainer Ring
Seal Kit
Lower Seat Spring
Coupler
Repair Kit
3132115
1001893
3132091
3131090
3131136
3131063
3131102
3131153
1920003-362
1004485
1004295-2
3131170
3132372
3132157
3132233
3132161
3131115
3131091
3131064
3131103
3131154
1900149-159
1007678
1007685-1
3131171
3132181
3132115
1001893
3132091
3131090
3131136
3131063
3131102
3131153
1920003-362
1004485
1004295-2
3131170
3132372
1
2
3
4
5
6
7
8
9
10
11
12
1*
1*
1*
1
1
1
1
1
1
1*
1*
1*
Lower Seat
Ball
Upper Seat
Crank
Sleeve
Lower Split Ring
Upper Split Ring
Retainer Ring
Spiral Retainer Ring
Seal Kit
Lower Seat Spring
Coupler
Repair Kit
3132118
3109423
3132094
3131090
3131136
3131065
3131104
3131155
1920003-387
1004486
1004295-4
3131170
3132373
3132158
3132234
3132162
3131115
3131091
3131066
3131105
3131156
1900149-161
1007778
1007685-4
3131171
3132182
3132118
3109423
3132094
3131090
3131136
3131065
3131104
3131155
1920003-387
1004486
1004295-4
3131170
3132373
3
3 1/2
*
4 1/4
5 1/4
CHECKGUARD® VALVES
Kellyguard Parts List
Offshore applications A must for every shear ram application
on floating and surface drilling
Drill pipe has been
sheared after
Checkguard valve
has been landed
in sub.
Shear / blind ram
Tool joint hangs
on pipe ram
Checkguard
valve in place
The Checkguard valve should be available to close off the drill string bore before shearing the
drill pipe in subsea or surface drilling where shear / blind rams are applied. The check valve is
pumped down to the landing sub prior to shearing the drill pipe. Later, reestablishment of well
control will be simplified as the blind rams and annular BOP can be opened without
experiencing flow up through the drill pipe.
* Included in Repair Kit
8
13
CHECKGUARD® VALVES
The Checkguard drop-in check valve is used in the
drill string. The check valve remains top side until
needed and is retrievable by wire line. It prevents
upward flow through the drill pipe, but allows fluid to
be pumped downward to circulate the well. The
check valve provides the driller with a means to
control the drill pipe pressures when required.
Installing a Checkguard valve improves well
control significantly. It serves as a check
valve to prevent upward flow through the drill
string while permitting downward mud pumping or
flow from injectors. Latching the check valve into the
landing sub contains the pressure in the drill pipe.
While stripping drill pipe into the hole, checkguard
valves control upward pressure in the drill pipe.
Prior to shearing drill pipe, install the check valve
to protect against the release of well pressure.
Installation of the check valve simplifies well control,
since formation pressures cannot communicate up
the drill string.
While tripping, Checkguard valves contain upward
well bore pressure in the drill pipe, allowing the top
connection to be open.
Checkguard valves use a spring and ball design.
Fluid can be pumped through the valve from the top.
But when fluid tries to flow from the bottom to the top,
the spring-loaded ball seals it.
Kellyguard Detail View of Parts
INSTALLATION AND RETRIEVAL
Spiral wound
retainer ring
Install the landing sub in the drill string while
tripping into the hole. Position the landing sub in the
lower end of the drill string.
Install the check valve by dropping it into an open
tool joint. Connect the kelly and pump the check
valve into the landing sub. Use the drill pipe safety
Kellyguard valve and lower Kellyguard valve if
excessive back flow exists.
Retrieve the check valve by installing a sinker bar
above the retrieving tool and using a wire line. Use
normal wire line procedures. Another way is
to trip the drill string and remove the check valve
from the landing sub with the retrieval tool.
12
Upper O-ring
with backups
Lower split
retainer ring
9
Upper seat
8
Included in
item No.10
Ball
7
Operating
Crank
Lower seat
3
6
For better operation, ensure the rubber packer
is clean and pliable. Check for foreign substances
such as paint, grease, and dirt on the packer surface.
Check for cracking and embrittlement of packer.
Never oil the rubber packer. Replace packer if
condition requires. The check valve should
be disassembled, cleaned, and lubricated once
it is retrieved from the landing sub after downhole
use. A suitable O-ring lubricant such as castrol
oil may be used.The valve should be stored in
a protected area, away from UV-rays and other
harsh elements, while not in use. This protects
working part.
Upper split
retainer ring
Retainer
ring
Lower seat
spring
Crank
Sleeve
4
2
Lower O-ring
with backups
Body
1
Cutaway view of standard Hydril Kellyguard
valve in open position.
11
5
12
Included in
item No.10
Body
New Abrasion Resistant Materials for the
Checkguard The ball seat has been improved with
the addition of a Tungsten Carbide coated sealing
surface. A new ceramic ball has been incorporated.
These new components are added to increase the
abrasion resistance of the valve to mud flow through
it, thus increasing its life.
A large rubber packer provides sealing when fluid
attempts to flow around the valve. The tapered body
engages the packer. The body is driven upward
by pressure from below. As the drill string
pressure increases, the pressure from below forces
a tighter seal.
KELLYGUARD™ DRILL STEM VALVES
Checkguard Valve Applications and Operations
Included in
item No.10
Exploded parts view of Hydril Kellyguard Valve
9
KELLYGUARD™ DRILL STEM VALVES
Kellyguard Maintenance and Testing
MAINTENANCE
DISASSEMBLY
1. Rotate the ball to the open position.
2. Remove
the
spiral-wound
retaining ring (figure 7-2) and the
solid retaining ring (figure 7-3).
3. Compress the lower seat spring
with the assembly tool (figure 7-4)
and remove the upper split
retainer ring.
4. Use the assembly tool to pull the
upper seat (figure 7-5).
5. Compress the lower seat spring
and remove the lower split
retainer ring (figure 7-6).
6. Rotate the ball to the closed
position and remove.
7. Press the crank assembly
(sleeve, crank, coupler and seals)
into the bore and remove.
8. Remove the lower seat (figure
7-7).
9. Remove upper O-ring and backup
rings.
VALVE
SERIES
ASSEMBLY TOOL
PART NO.
3 - 3 1/2
1006175
4 1/4 - 5 1/4
1005693
6 1/4
3123539
7 1/4
3120299
Figure 7-2
Figure 7-1
Assembly
Tool
The Kellyguard valve requires very little maintenance.
The box and pin connections should be cared for just
as any other tool joint. Periodic inspection of
connections is suggested.
It should be greased during assembly. The seals in the
valve should be replaced at a regular interval. The type
of service the valve is given will affect the length of time
between seal changes. If the valve is used with oilbase muds, the seals should be changed more often
than with water-base muds. Six to nine months is a
normal interval for seal changes under most
conditions. Whenever the valve is disassembled, all
elastomeric seals should be changed (see section 5 for
assembly-disassembly instructions).
TESTING
1. Rotate ball to open position.
2. Install test plug and test cap in box and pin ends.
3 Measure torque to close and open valve. Torque
shall be as shown in Table 1.
4. Mount valve in the vertical position with the ball
and bleed valve open and fill valve cavity with
soluble oil mixture. Once the system is filled, cycle
the valve five (5) times to bleed the air. Overflow
Figure 7-3
Figure 7-4
Figure 7-5
Figure 7-6
5.
6.
7.
8.
9.
10.
the system for five (5) seconds and close bleed the
valve.
Pressurize valve cavity to rated working pressure.
After five (5) minutes at the rated working
pressure, observe crank seal for fluid leakage. No
leakage is allowed.
Drop pressure to zero.
With bleed valve open and system filled, rotate the
ball to the closed position.
Pressurize the lower valve cavity to the rated
working pressure and allow system to stabilize for
five (5) minutes after system has stabilized. The
maximum allowable pressure drop is 100 psi.
Depressurize and drain valve. Torque shall be as
shown in Table 1.
When all tests are successfully completed, drain
all fluid from the valve assembly and blow dry. Fill
and drain all internal cavities with hydraulic oil.
Install thread protectors on ends.
Table 1
Size
Torque (Ft-Lbs)
3
5-25
3 1/2
10-35
4 1/4
15-40
5 1/4
14-45
Figure 7-7
ASSEMBLY
Lubricate All Parts Prior to Assembly.
1. Insert the lower seat assembly
(seat, seals, and spring) into the
body and pull into place with the
assembly tool.
2. Press the crank assembly into
the hole from the bore and
rotate to closed position.
3. Rotate the ball to a closed
10
position and insert.
4. Install the upper O-ring and
backup rings.
5. Install the lower split retainer
ring in the lowest groove.
6. Install the upper seat using the
assembly tool.
7. Install the upper split retainer
ring and the solid retainer ring.
Release the assembly tool.
8. Install
the
spiral-wound
retaining ring.
9. Pressure test the valve. It is
ready for service.
11
KELLYGUARD™ DRILL STEM VALVES
Kellyguard Assembly Procedure
KELLYGUARD™ DRILL STEM VALVES
Kellyguard Maintenance and Testing
MAINTENANCE
DISASSEMBLY
1. Rotate the ball to the open position.
2. Remove
the
spiral-wound
retaining ring (figure 7-2) and the
solid retaining ring (figure 7-3).
3. Compress the lower seat spring
with the assembly tool (figure 7-4)
and remove the upper split
retainer ring.
4. Use the assembly tool to pull the
upper seat (figure 7-5).
5. Compress the lower seat spring
and remove the lower split
retainer ring (figure 7-6).
6. Rotate the ball to the closed
position and remove.
7. Press the crank assembly
(sleeve, crank, coupler and seals)
into the bore and remove.
8. Remove the lower seat (figure
7-7).
9. Remove upper O-ring and backup
rings.
VALVE
SERIES
ASSEMBLY TOOL
PART NO.
3 - 3 1/2
1006175
4 1/4 - 5 1/4
1005693
6 1/4
3123539
7 1/4
3120299
Figure 7-2
Figure 7-1
Assembly
Tool
The Kellyguard valve requires very little maintenance.
The box and pin connections should be cared for just
as any other tool joint. Periodic inspection of
connections is suggested.
It should be greased during assembly. The seals in the
valve should be replaced at a regular interval. The type
of service the valve is given will affect the length of time
between seal changes. If the valve is used with oilbase muds, the seals should be changed more often
than with water-base muds. Six to nine months is a
normal interval for seal changes under most
conditions. Whenever the valve is disassembled, all
elastomeric seals should be changed (see section 5 for
assembly-disassembly instructions).
TESTING
1. Rotate ball to open position.
2. Install test plug and test cap in box and pin ends.
3 Measure torque to close and open valve. Torque
shall be as shown in Table 1.
4. Mount valve in the vertical position with the ball
and bleed valve open and fill valve cavity with
soluble oil mixture. Once the system is filled, cycle
the valve five (5) times to bleed the air. Overflow
Figure 7-3
Figure 7-4
Figure 7-5
Figure 7-6
5.
6.
7.
8.
9.
10.
the system for five (5) seconds and close bleed the
valve.
Pressurize valve cavity to rated working pressure.
After five (5) minutes at the rated working
pressure, observe crank seal for fluid leakage. No
leakage is allowed.
Drop pressure to zero.
With bleed valve open and system filled, rotate the
ball to the closed position.
Pressurize the lower valve cavity to the rated
working pressure and allow system to stabilize for
five (5) minutes after system has stabilized. The
maximum allowable pressure drop is 100 psi.
Depressurize and drain valve. Torque shall be as
shown in Table 1.
When all tests are successfully completed, drain
all fluid from the valve assembly and blow dry. Fill
and drain all internal cavities with hydraulic oil.
Install thread protectors on ends.
Table 1
Size
Torque (Ft-Lbs)
3
5-25
3 1/2
10-35
4 1/4
15-40
5 1/4
14-45
Figure 7-7
ASSEMBLY
Lubricate All Parts Prior to Assembly.
1. Insert the lower seat assembly
(seat, seals, and spring) into the
body and pull into place with the
assembly tool.
2. Press the crank assembly into
the hole from the bore and
rotate to closed position.
3. Rotate the ball to a closed
10
position and insert.
4. Install the upper O-ring and
backup rings.
5. Install the lower split retainer
ring in the lowest groove.
6. Install the upper seat using the
assembly tool.
7. Install the upper split retainer
ring and the solid retainer ring.
Release the assembly tool.
8. Install
the
spiral-wound
retaining ring.
9. Pressure test the valve. It is
ready for service.
11
KELLYGUARD™ DRILL STEM VALVES
Kellyguard Assembly Procedure
CHECKGUARD® VALVES
The Checkguard drop-in check valve is used in the
drill string. The check valve remains top side until
needed and is retrievable by wire line. It prevents
upward flow through the drill pipe, but allows fluid to
be pumped downward to circulate the well. The
check valve provides the driller with a means to
control the drill pipe pressures when required.
Installing a Checkguard valve improves well
control significantly. It serves as a check
valve to prevent upward flow through the drill
string while permitting downward mud pumping or
flow from injectors. Latching the check valve into the
landing sub contains the pressure in the drill pipe.
While stripping drill pipe into the hole, checkguard
valves control upward pressure in the drill pipe.
Prior to shearing drill pipe, install the check valve
to protect against the release of well pressure.
Installation of the check valve simplifies well control,
since formation pressures cannot communicate up
the drill string.
While tripping, Checkguard valves contain upward
well bore pressure in the drill pipe, allowing the top
connection to be open.
Checkguard valves use a spring and ball design.
Fluid can be pumped through the valve from the top.
But when fluid tries to flow from the bottom to the top,
the spring-loaded ball seals it.
Kellyguard Detail View of Parts
INSTALLATION AND RETRIEVAL
Spiral wound
retainer ring
Install the landing sub in the drill string while
tripping into the hole. Position the landing sub in the
lower end of the drill string.
Install the check valve by dropping it into an open
tool joint. Connect the kelly and pump the check
valve into the landing sub. Use the drill pipe safety
Kellyguard valve and lower Kellyguard valve if
excessive back flow exists.
Retrieve the check valve by installing a sinker bar
above the retrieving tool and using a wire line. Use
normal wire line procedures. Another way is
to trip the drill string and remove the check valve
from the landing sub with the retrieval tool.
12
Upper O-ring
with backups
Lower split
retainer ring
9
Upper seat
8
Included in
item No.10
Ball
7
Operating
Crank
Lower seat
3
6
For better operation, ensure the rubber packer
is clean and pliable. Check for foreign substances
such as paint, grease, and dirt on the packer surface.
Check for cracking and embrittlement of packer.
Never oil the rubber packer. Replace packer if
condition requires. The check valve should
be disassembled, cleaned, and lubricated once
it is retrieved from the landing sub after downhole
use. A suitable O-ring lubricant such as castrol
oil may be used.The valve should be stored in
a protected area, away from UV-rays and other
harsh elements, while not in use. This protects
working part.
Upper split
retainer ring
Retainer
ring
Lower seat
spring
Crank
Sleeve
4
2
Lower O-ring
with backups
Body
1
Cutaway view of standard Hydril Kellyguard
valve in open position.
11
5
12
Included in
item No.10
Body
New Abrasion Resistant Materials for the
Checkguard The ball seat has been improved with
the addition of a Tungsten Carbide coated sealing
surface. A new ceramic ball has been incorporated.
These new components are added to increase the
abrasion resistance of the valve to mud flow through
it, thus increasing its life.
A large rubber packer provides sealing when fluid
attempts to flow around the valve. The tapered body
engages the packer. The body is driven upward
by pressure from below. As the drill string
pressure increases, the pressure from below forces
a tighter seal.
KELLYGUARD™ DRILL STEM VALVES
Checkguard Valve Applications and Operations
Included in
item No.10
Exploded parts view of Hydril Kellyguard Valve
9
KELLYGUARD™ DRILL STEM VALVES
Checkguard Valve Offshore Application
Valve Item No. Qty.
Size
Part Name
10M
10M NACE
15M
1
2
3
4
5
6
7
8
9
10
11
12
1*
1*
1*
1
1
1
1
1
1
1*
1*
1*
Lower Seat
Ball
Upper Seat
Crank
Sleeve
Lower Split Ring
Upper Split Ring
Retainer Ring
Spiral Retainer Ring
Seal Kit
Lower Seat Spring
Coupler
Repair Kit
3132111
1007483
3132085
3131113
3131096
3131059
3131098
3131149
1920003-231
1007482
1004295-5
3131175
3132370
3132155
3132231
3132159
3131118
3131169
3131060
3131099
3131150
1920003-231
1007178
1007685-3
3131176
3132179
3132111
1007483
3132085
3131113
3131096
3131059
3131098
3131149
1920003-231
1007482
1004295-5
3131175
3132370
1
2
3
4
5
6
7
8
9
10
11
12
1*
1*
1*
1
1
1
1
1
1
1*
1*
1*
Lower Seat
Ball
Upper Seat
Crank
Sleeve
Lower Split Ring
Upper Split Ring
Retainer Ring
Spiral Retainer Ring
Seal Kit
Lower Seat Spring
Coupler
Repair Kit
3132113
1004583
3132088
3131111
3131094
3131061
3131100
3131151
1920003-287
1006889
1004295-3
3131173
3132371
3132156
3132232
3132160
3131117
3131095
3131062
3131101
3131152
1920003-287
1007278
1007685-2
3131172
3132180
3132113
1004583
3132088
3131111
3131094
3131061
3131100
3131151
1920003-287
1006889
1004295-3
3131173
3132371
1
2
3
4
5
6
7
8
9
10
11
12
1*
1*
1*
1
1
1
1
1
1
1*
1*
1*
Lower Seat
Ball
Upper Seat
Crank
Sleeve
Lower Split Ring
Upper Split Ring
Retainer Ring
Spiral Retainer Ring
Seal Kit
Lower Seat Spring
Coupler
Repair Kit
3132115
1001893
3132091
3131090
3131136
3131063
3131102
3131153
1920003-362
1004485
1004295-2
3131170
3132372
3132157
3132233
3132161
3131115
3131091
3131064
3131103
3131154
1900149-159
1007678
1007685-1
3131171
3132181
3132115
1001893
3132091
3131090
3131136
3131063
3131102
3131153
1920003-362
1004485
1004295-2
3131170
3132372
1
2
3
4
5
6
7
8
9
10
11
12
1*
1*
1*
1
1
1
1
1
1
1*
1*
1*
Lower Seat
Ball
Upper Seat
Crank
Sleeve
Lower Split Ring
Upper Split Ring
Retainer Ring
Spiral Retainer Ring
Seal Kit
Lower Seat Spring
Coupler
Repair Kit
3132118
3109423
3132094
3131090
3131136
3131065
3131104
3131155
1920003-387
1004486
1004295-4
3131170
3132373
3132158
3132234
3132162
3131115
3131091
3131066
3131105
3131156
1900149-161
1007778
1007685-4
3131171
3132182
3132118
3109423
3132094
3131090
3131136
3131065
3131104
3131155
1920003-387
1004486
1004295-4
3131170
3132373
3
3 1/2
*
4 1/4
5 1/4
CHECKGUARD® VALVES
Kellyguard Parts List
Offshore applications A must for every shear ram application
on floating and surface drilling
Drill pipe has been
sheared after
Checkguard valve
has been landed
in sub.
Shear / blind ram
Tool joint hangs
on pipe ram
Checkguard
valve in place
The Checkguard valve should be available to close off the drill string bore before shearing the
drill pipe in subsea or surface drilling where shear / blind rams are applied. The check valve is
pumped down to the landing sub prior to shearing the drill pipe. Later, reestablishment of well
control will be simplified as the blind rams and annular BOP can be opened without
experiencing flow up through the drill pipe.
* Included in Repair Kit
8
13
CHECKGUARD® VALVES
Kellyguard Application Data
MAKE-UP TORQUE FOR
KELLYGUARD CONNECTION
Landing Sub
After the correct
size check valve
is determined,
choose a matching
landing sub. Select
a landing sub
with threaded
connections and
outside diameter
compatible with the
mating tool joints of
the drill string.
Retrieving
Tool
Fitted with
a 5/8 API
sucker rod
connection
(15/16-10
UNS) for
connection
to wireline.
Check Valve
Use the largest size
check valve that can
pass through the drill
string to the landing
sub to provide the
largest flow area for
circulation. Determine
the smallest inside
diameter through which
the check valve must
pass. Verify kelly, lower
kelly valve, tool joints,
and sometimes drill
collars. The check valve
OD must be at least
1/16 inch smaller than
this inside diameter.
Once smallest bore
is determined, read
across table for
correct valve size.
CONNECTION
3
NC 31 (2 7/8 API IF)
5,900
8,700
NC 38 (3 1/2 API IF)
9,100
17,000
4 1/4
5 1/4
NC 38 (3 1/2 API IF)
4-1/4" – 10,000 PSI
W.P. KELLYGUARD* VALVE
MAXIMUM
MAKE-UP MAKE-UP
TORQUE TORQUE
(FT.-LBS)* (FT.-LBS)**
VALVE
SIZE
(IN.)
3 1/2
KELLYGUARD™ DRILL STEM VALVES
Checkguard Valve Selection
9,100
13,200
NC 46 (4 API IF)
17,000
28,900
4 1/2 FH
17,400
26,200
NC 50 (4 1/2 API IF)
18,900
39,300
4 1/2 API REG LH
20,300
22,700
NC 46 (4 API IF)
17,000
26,900
NC 50 (4 1/2 API IF)
18,900
34,100
6 5/8 API REG LH
41,700
56,700
NC 50 (4 1/2 API IF)
18,900
32,700
5 1/2 FH
28,000
47,800
6 5/8 API REG LH
41,700
54,000
**The Torque values listed are
upper limits not to be exceeded.
The correct make-up torque for
a specific Kellyguard/Drill pipe
connection will be the make-up
torque recommended in API
Spec RP 7G for the Drill Pipe/Tool
Joint combination or the value
listed above, which ever is lower.
The graph represents torque as a function of pressure.
The line identified as (A) depicts torque required to open the
valve with 0 pressure above the ball. Although this is
infrequently done, it is of interest when compared to other
manufacturer’s valves. Line (B) depicts the balance condition,
i.e. pressure above and below ball are approximately equal.
Note the reduction in torque requirement.
*Graphs for other size and Kellyguard valves are similar.
INTERCHANGEABILITY OF ROTARY SHOULDER
CONNECTIONS
API
CONNECTION
NC26
NC31
NC38
INTERNAL FLUSH
2 3/8
2 7/8
3 1/2
FULL HOLE
NC46
NC50
4
4 1/2
4 1/2
5
4
4 1/2
4
EXTRA HOLE
3 1/2
WIDE OPEN
SLIM HOLE
NC40
3 1/2
2 7/8
3 1/2
4
4 1/2
Most Hydril Kellyguard end connections can be re-cut. Contact your
Hydril representative for more information.
Hex Wrench Size,
across flats
14
7
KELLYGUARD™ DRILL STEM VALVES
Valve
Size
inches
6
ID
inches
Weight
Hex
Wrench
lbs.
inches
Connection
OD
Length
inches
inches
Checkguard Valve Selection
10,000 psi
10,000 psi NACE Trim
15,000 psi
Part Number
Part Number
Part Number
3
1 3/4
53
1/2
NC31 (2 7/8 IF)
4.25
16.50
3132183-1
3132185-1
3132184-1
3
1 3/4
69
1/2
NC38 (3 1/2 IF)
4.25
16.06
3132183-2
3132185-2
3132184-2
3
1 3/4
59
1/2
3 1/2 EUE 8R
4.25
15.50
3132183-3
3132185-3
3132184-3
3
1 3/4
59
1/2
2 7/8 EUE 8R
4.25
16.60
3132183-4
3132185-4
3132184-4
3
1 3/4
69
1/2
WT38
4.75
16.50
3132183-5
3132185-5
3132184-5
3
1 3/4
1/2
NC38 (3 1/2 IF)
4.75
25.00
3132183-6
3132185-6
3132184-6
3
1 3/4
3 1/2
2 1/4
80
1/2
XT39
5.00
15.51
5/8
NC38 (3 1/2 IF)
5.38
18.06
15,000 psi NACE TRIM CHECKGUARD
ASSEMBLY (VALVE, SUB & TOOL)
CHK
L-SUB END
ASSEMBLY
NO.
CONNECTION
PART NO.
O.D.
inches
BORE
inches
WT
lbs.
#27
1 11/16
5/8
5
#35
3132174-1
LANDING SUB
RETRIEVAL TOOL
PART NO.
O.D.
inches
BORE
inches
LENGTH
inches
WT
lbs.
PART NO.
WT
PART NO.
3126348
4 1/8
1 5/8
36
105
3126354-1
8
1007225
14
1007425
21
1004625
28
1007725
NC 31 (2 7/8 IF)
3126321-01
NC 38 (3 1/2 IF)
3126321-02
4 3/4
3126354-2
WT 38
3126321-03
5 1/8
3126354-3
XT 39
3126321-04
5
3126354-4
NC 38 (3 1/2 IF)
3126322-01
2 3/16
7/8
13
3126349
4 3/4
2 1/8
36
120
3126355-1
4 1/2 FH
3126322-02
6
3126355-2
NC 46 (IF)
3126322-03
6 1/4
3126355-3
NC 50 (4 1/2 IF)
3126322-04
6 3/8
3126355-4
3132173-1
4 1/2 RRH
3126322-05
5 3/4
3126355-5
4 1/2 RRHBXB
3126322-06
5 3/4
3126355-6
3 1/2 EUE
3126322-07
5
3126355-10
3132184-7
3132172-1
CHECK VALVE
3 1/2
2 1/4
115
5/8
4 1/2 FH
6.13
18.06
3132172-2
3132174-2
3132173-2
3 1/2
2 1/4
135
5/8
NC50 (4 1/2 IF)
6.38
17.56
3132172-3
3132174-3
3132173-3
3 1/2
2 1/4
120
5/8
NC46 (4 IF)
6.13
17.56
3132172-4
3132174-4
3132173-4
3 1/2
2 1/4
115
5/8
4 1/2 REG LH
6.13
17.82
3132172-5
3132174-5
3 1/2
2 1/4
80
5/8
NC40 (4" FH)
5.38
17.56
3132172-6
3132174-6
3 1/2
2 1/4
5/8
NC38 SHORT
5.38
15.50
3132172-9
3132174-11
4 1/2 NVAM
3126322-09
5
3126355-12
WT40
3126322-15
5 1/2
3126355-15
3132173-5
WT40 box x XT39 pin
3126322-16
5 3/8
3126355-16
3132173-6
WT40 box x HT38 pin
3126322-17
5 1/4
3126357-17
#43
NC 50 (4 1/2 IF)
3126323-01
NC 50 (4 1/2 IF)
3126323-02
2 11/16
1 3/8
18
3126350
6 1/8
6 1/4
2 5/8
36
230
3126356-1
3126356-2
NC 50 (4 1/2 IF)
3126323-03
6 3/8
3126356-3
3 1/2
2 1/4
5/8
WT 40
5.38
18.06
3132173-14
3 1/2
2 1/4
5/8
DS50
6.38
17.56
3132173-11
NC 50 (4 1/2 IF)
3126323-04
6 1/2
3126356-4
NC 46 (4 IF)
3126323-05
6 1/8
3126356-5
NC 46 (4 IF)
3126323-06
6 1/4
3126356-6
NC 46 (4 IF)
3126323-07
6 3/8
3126356-7
NC 46 (4 IF)
3126323-08
6 1/2
3126356-8
5 1/2 FH
3126323-10
7
3126356-10
4 1/4
2 13/16
130
7/8
NC46 (4 IF)
6.63
20.06
3132166-1
3132168-1
3132163-1
4 1/4
2 13/16
134
7/8
NC50 (4 1/2 IF)
6.63
20.06
3132166-2
3132168-2
3132163-2
4 1/4
2 13/16
228
7/8
5 1/2 IF
7.75
19.56
3132166-3
3132168-3
3132163-3
4 1/4
2 13/16
215
7/8
6 5/8 REG LH
7.75
19.56
3132166-4
3132168-4
3132163-4
4 1/4
2 13/16
117
7/8
NC50 SHORT
6.63
15.75
3132166-5
3132168-5
3132163-5
4 1/4
2 13/16
7/8
NC50 LONG
6.63
33.06
3132166-6
3132168-6
3132163-6
4 1/4
2 13/16
7/8
HT55 (400)
7.00
20.06
3133038
5 1/4
3 1/16
180
7/8
NC50 RH
7.38
20.06
3132169-1
3132171-1
3132170-1
5 1/4
3 1/16
192
7/8
5 1/2 FH
7.38
19.56
3132169-2
3132171-2
3132170-2
5 1/4
3 1/16
188
7/8
NC56
7.38
19.56
3132169-3
3132171-3
3132170-3
NC 50 (4 1/2 IF)
#48
NC 50 (4 1/2 IF)
3126323-19
3126324-01
6 5/8
3
1 11/16
23
3126351
6 3/8
3126356-19
2 15/16
36
220
3126357-1
5 1/2 FH
3126324-02
7
3126357-2
6 5/8 RRH
3126324-03
7 3/4
3126357-3
6 5/8 RRH BXB
3126324-04
7 3/4
3126357-4
6 5/8 FH
3126324-05
8
3126357-5
6 5/8 RRH
3126324-06
8
3126357-6
NC 50 (4 1/2 IF)
3126324-08
6 5/8
3126357-8
6 5/8 FH
3126324-11
8 1/4
3126357-11
5 1/4
3 1/16
218
7/8
5 1/2 IF
7.75
19.56
3132169-4
3132171-4
3132170-4
5 1/4
3 1/16
218
7/8
6 5/8 REG LH
7.75
19.56
3132169-5
3132171-5
3132170-5
6 5/8 FH
3126324-12
8 1/2
3126357-12
5 1/4
3 1/16
7/8
6 5/8 REG RH
7.88
19.56
3132169-6
3132171-6
3132170-6
WT 56
3126324-14
7 3/4
3126357-14
5 1/4
3 1/16
140
7/8
6 5/8 REG RH
SHORT
7.38
15.81
3132169-7
3132171-7
3132170-7
XT57
3126324-16
8
3126357-16
WT50 box X HT55 pin
3126324-19
7 1/8
3126357-19
5 1/4
3 1/16
205
7/8
6 5/8 FH
8.00
19.56
3132169-8
XT57
3126324-20
7 3/8
3126357-20
XT57 box X HT55 pin
3126324-21
7
3126357-21
5 1/4
3 1/16
5 1/4
5 1/4
270
7/8
7 5/8 REG RH
8.63
16.56
3132169-9
3132170-10
3 1/16
7/8
5 1/2 FH DSTJ
pin X WT50 box
7.38
19.56
3132170-14
To Select correct Checkguard valve determine:
3 1/16
7/8
XT57
7.38
16.25
3132170-15
1. Smallest bore in drill string through which the check valve must pass. 2. Landing sub connection size and type.
3. Outside diameter of mating tool joints.
15
CHECKGUARD® VALVES
Kellyguard Sizes Engineering Data
CHECKGUARD® VALVES
Checkguard is a drop-in check valve for the drill string.
The check valve remains top side until needed and is
retrievable by wire line. It provides the driller a means to
control the drill pipe pressure when required. The check
valve prevents upward flow through the drill pipe, but
allows fluid to be pumped downward to circulate the
well.
15,000 psi Working Pressure
Checkguard seals up to 15,000 psi working pressure;
yet it is lightweight and easily handled.
Maximized Flow Area
Downward flow areas are maximized, allowing high flow
capacity and long life.
Installed As Needed
The check valve remains on the drill floor until it is
needed. Many downhole valves are part of the drill
string and are constantly subject to abrasive wear. This
Kellyguard Valve Features
wear results in frequent replacement of valves and can
prevent valve closure when needed. Checkguard is not
exposed to premature deterioration. Only the landing
sub is installed as the drill string is run. When control is
needed, the check valve is pumped down the drill string
where it latches automatically in the landing sub.
Wire Line Retrieved
Since the check valve can be wire line retrieved, it
eliminates the need to trip the drill string for retrieval. Yet
retrieval can also be accomplished after tripping out the
drill string.
Positive Closure
Traveling down the drill string, the check valve lands on
the landing sub sleeve and latches positively into place.
The replaceable landing sleeve has recessed areas into
which the check valve packer seals. Upward pressure is
contained by the packer and ball.
KELLYGUARD™ VALVES
Checkguard Features
Well pressure creates primary
seal. The primary seal is
produced by forcing the ball
against the upper seat. Sealing
is efficient in high or low
pressure. Under low pressure,
the spring-loaded lower seat
creates initial sealing. High
pressure forces the ball against
the upper seat.
Quality control measures are exacting. Here, the
stainless steel ball is prepared for inspection. The
precise shape of the ball is recorded using a Talyrond
inspection device. Each and every ball is inspected for
size, finish, and sphericity.
Pressure balancing. With a
closed valve containing well
pressure from below, pressure
applied from above equalizes
the force on the ball. This
pressure balancing significantly
reduces
operating
torque
necessary to open the valve,
even at high pressure.
Kellyguard valves feature a replaceable operating
crank sleeve. This sleeve protects the body from
unnecessary wear to extend life and reduce costs. The
crank operates inside the sleeve and is coated to
reduce friction. The coating decreases torque and wear
between the bearing surfaces. The sleeve also has a
positive stop mechanism so the crank turns 90 degrees
for full opening and closing. Operation is easy with the
hex-operating wrench.
Ball
T-shaped seal and
backup rings provide
a pressure seal and
minimize rotational
friction.
Downward pressure seal for
mud saver. Pressure from
above acts on the ball forcing it
against the lower seat to provide
a reliable seal.
Landing sub in
drill string. check
valve is stored
top side.
16
Check valve has
landed in the sub.
it is allowing
circulation of
drilling fluid.
The check valve
has landed and
latched in the sub
and is containing
well pressure. The
ball closes
against upward
pressure.
O-ring seal and backup rings provide a
seal between the
body and sleeve.
Coupler
Operating Crank
Crank Dog
Sleeve
The retrieving
tool is unlatching
and lifting the
check valve.
Open Position
Closed Position
5
KELLYGUARD™ VALVES
Hydril designed and developed the
original one piece Kellyguard valve
to fit the full range of kelly valve
applications, and set the standard
for the industry. The Kellyguard
valve can serve as an upper kelly
cock, top drive kelly cock, lower
kelly cock, drill pipe safety valve,
and mud saver. Minimum torque is
needed to open the valve.
Pressure Balancing Allows Easy
Opening. The Kellyguard valve is
easily opened, even while sealing
pressure. Operating torque is
minimized by balancing pressures,
above and below the ball. Pressure
applied to the top of the ball
equalizes well pressure acting on
the ball from below. Because the ball
is floating, the downward pressure
acting on it reduces the friction
between the ball and the seat. This
reduction in friction decreases the
torque required to rotate the ball,
and thus allow opening of the valve.
Abrasion-Resistant
Metal-toMetal Seals are Effective in Low
or High Pressure. The sealing
surfaces on the ball and seats are
metal-to-metal providing reliable
sealing from low to high pressure.
Designed for Demands of Modern
Applications: Stainless Steel,
Interchangeable
Parts,
Easy
Maintenance, Long Service Life.
Kellyguard valves require little
maintenance. They have few operating parts, allowing
easy repair. No lubrication is necessary except during
assembly. All internal parts are stainless steel for
corrosion resistance and long service life. They are
precisely manufactured for interchangeability, allowing
easy fitting of parts during assembly or repair. For
traditional applications, Kellyguard valves are
manufactured with enough length on each end to recut the connection in case of damaged threads or
shoulders. The box and pin connections are cared for
as any tool joint with periodic inspections.
Stainless steel ball and seats provide
metal-to-metal sealing to ensure pressure
integrity under a wide range of operating
conditions.
10,000 or 15,000 psi Protection
Kellyguard valves have a one piece
compact body for easy handling
and provide protection from 10,000 or 15,000 psi. For
maximum safety, Hydril tests all bodies at 1 1/2 times
rated working pressure.
Checkguard Valve Assembly Parts
1D
ITEM
DESCRIPTION
QTY
NO. 27
NO. 35
NO. 43
NO. 48
1A
CAGE, BALL
1
3132109
3132108
3132107
3131853
***1B
SEAT, BALL
1
3127085
3126408
3126450
3127110
1C
BODY
1
3126367
3125115
3126588
3127112
1D
NUT
1
3127090
3125116
3126586
3127113
1E
SLIP
1
3127036
3125117
3126587
3127052
***1F
PACKER
1
3126334
3125118
3126397
3126563
***1G
BACKUP RING, INNER
1
3127092
3126560
3126590
3127114
***1H
BACKUP RING, OUTER
1
3127093
3126561
3126589
3127115
1I
RETAINING RING
1
3126579-2
3126579-3
3126579-4
3126579-5
1J
SPRING, UPPER
1
3126660
3126516
3126518
3126520
***1K
SPRING, VALVE
1
3126515
3126517
3126519
3126521
***1L
BALL
1
1900754-2
1900754-3
1900754-4
1900754-5
1M
RETAINING SCREW
2
3125122-2
3125122-3
3125122-3
3125122-3
1N
SET SCREW
1
1900755-0603
1900755-0604
1900755-0604
1900755-0604
3133165
3133166
3133167
3133168
4
1J
1C
1M
REPAIR KIT
1M
1I
1H
1F
1G
1B
1L
1K
1N
1A
***Included in Repair Kit
6
5
LANDING SUB ASSEMBLY
4
ITEM
DESCRIPTION
QTY
2
SUB BODY
1
LANDING SLEEVE
SPLIT RING
**3
5
Open and close positions are clearly indicated on all models. A
stop mechanism ensures full 90 degrees rotation for full opening
and closing. Proper positioning of the ball provides excellent
performance and a long service life. Minimum torque is needed to
open the valve because of the pressure balancing function.
1E
CHECK VALVE ASSEMBLY
4
Hydril manufacturing
procedures meet the highest
international standards of quality.
Hydril's 9001 Certificate attests
to its commitment to quality.
CHECKGUARD® VALVES
Operational Advantages and Durable Components
Result in Low Cost of Ownership
NO. 27
NO. 35
NO. 43
NO. 48
1
3127095
3125119
3126392
3127117
1
3131099
3131101
3131103
3131105
3
RING RETAINER
1
3131150
3131152
3131154
3131156
**6
RING RETAINER-SPIRAL
1
1920003-231
1900149-148
1900149-159
1900149-161
*7
QUAD RING
1
1921173-230
1921173-234
1921173-240
1921173-244
*8
O RING
1
1900004-233
1900004-340
1900004-346
1900004-349
*9
BACKUP RING
2
1920069-233
1920069-340
1920069-346
1920069-349
**
SEAL KIT
3133149
3133148
3133147
3126357-SK
REPAIR KIT
3133152
3133151
3133150
3126357-RK
7
8
9
2
*Included in Seal Kit
**Included in Repair Kit
RETRIEVAL TOOL (Not shown in this illustration)
ITEM
DESCRIPTION
QTY
NO. 27
NO. 35
NO. 43
NO. 48
RETRIEVAL TOOL
1
1007225
1007425
1004625
1007725
17
CHECKGUARD® VALVES
PACKER REPLACEMENT (1F)
1. Remove retainer ring (1I) and two retaining screws
(1M) from valve body (1C).
2. Slide lower portion of valve from valve body.
3. Remove outer backup ring (1H), inner backup ring
(1G), and packer (1F).
4. Check metal parts for damage. If in good condition,
install new packer (1F) with square shouldered end
down (toward ball). Do not oil or grease packer.
5. Install inner and outer backup rings (1H and 1G).
6. Slide lower portion of valve into valve body by
hand. Install two retaining screws (1M) into valve
body (1C). Ensure that screws are fully seated in
groove on outside of ball seat (1B).
7. Install retainer ring (1I) over two retaining screws
(1M) so that ring fits into slots on screws.
VALVE REPLACEMENT (1N)
1. Remove set screw (1N) from ball cage (1A).
2. Unscrew and remove ball cage (1A) from ball seat
(1B).
3. Remove ball (1L) and ball spring (1K).
4. Inspect ball seat to ensure good sealing surface.
Repair if not smooth before replacing ball and
spring.
5. Replace and tighten ball cage onto ball seat.
6. Install set screw (1N) into ball cage (1A).
Ensure that screw is fully seated in groove on
ball seat (1B).
7. Lubricate surfaces with light grease.
8. Install the O-ring (8) and back up rings (9) in the
ring groove in the sub body.
9. Install the O-ring (7) into the landing sleeve (3)
10. Install the landing sleeve (3).
11. Install the upper split ring (4) into the sub body (2).
12. Install the retainer ring (5) and the retaining ring (6)
into the upper split ring (4).
CHECKGUARD VALVE STORAGE
At the conclusion of each well or prior to placing the
valve in storage for even a brief period, it is
recommended that the Checkguard valve be
disassembled, cleaned, inspected, lubricated thoroughly with non-petroleum base oil such as castor oil
or silicon oil, and reassemble. Do not lubricate packer.
Replacement of worn packer, seal rings and other
parts can be made conveniently at this time.
seals are O-rings with backup rings on each side.
The crank seal is a "T" with backup rings on each
side. The sleeve seal is an O-ring with backup rings
on each side.
use of chemical sulfide scavengers, and 3) use of a
drilling fluid in which oil is the continuous phase."
This configuration is designed for operating
pressures of 10,000 or 15,000 psi.
The standard Kellyguard valve is intended for
normal drilling environments and those described
in NACE MR0175, section 11, which states: "The
drilling environment is controlled by maintaining
drilling fluid hydrostatic head and fluid density to
minimize formation fluid in-flow and by the use of one
or more of the following: 1) Maintenance of pH 10 or
higher to neutralize H2S in the drilled formation, 2)
The NACE Trim Kellyguard valve is intended for
normal and corrosive drilling environments and
limited exposure to H2S. The limiting factors for H2S
exposure includes H2S concentration, pH, time, and
temperature. This configuration uses a standard
Kellyguard valve body and NACE compliant internal
parts and is rated for 10,000 psi operating pressure.
6
1D
5
1E
4
1J
3
7
SLIP DISASSEMBLY / ASSEMBLY (1E)
1. Unscrew and remove slip nut (1D) from valve body (1C).
2. Remove slip (1E) and slip spring (1J).
3. Clean and inspect disassembled parts. Replace
any parts that are worn or damaged.
4. Lubricate surfaces with light grease.
5. Install slip spring (1J) and slip (1E).
6. Install slip nut (1D).
8
1M
1M
1I
1H
1G
1F
LANDING SUB DISASSEMBLY/ ASSEMBLY (2-9)
1. Remove the retaining ring (6) and the retainer ring
(5) from the upper split ring (4).
2. Remove the upper split ring (4) from the sub body (2).
3. Remove the landing sleeve (3).
4. Remove the O-ring (7) from the landing sleeve.
5. Remove the O-ring (8) and back up rings (9) from
the sub body.
6. Clean and inspect disassembled parts that are
worn or damaged.
18
9
1C
2
1B
Retrieving
Tool
1L
1K
1N
1A
Cutaway View
These are cutaway views of the valve in the closed position. Hydril
offers Kellyguard: standard and NACE Trim models. In the Hydril
NACE Trim, the internal parts only are NACE compatible.
Contact your Hydril representative for more information regarding Hydril Kellyguard
valves suitable for H2S sour gas service.
3
KELLYGUARD™ VALVES
Standard Model and NACE Trim
Kellyguard Valves
Checkguard Valve Maintenance
KELLYGUARD™ VALVES
OF
CONTENTS
KELLYGUARD VALVES
Standard Model and NACE Trim ................................2
Operational Advantages and ....................................4
Durable Components
Kellyguard Valve Features ..........................................5
KELLYGUARD DRILL STEM VALVES
Engineering Data........................................................6
Application Data ........................................................7
Parts List ....................................................................8
Detail View of Parts ....................................................9
Assembly Procedure ................................................10
Maintenance and Testing..........................................11
CHECKGUARD VALVES
Applications and Operations ....................................12
Offshore Application ................................................13
Checkguard Valve Selection ....................................14
Features....................................................................16
Assembly Parts ........................................................17
Maintenance ............................................................18
Rubber Goods Storage for ......................................19
Checkguard and Kellyguard Valves
Standard Model and NACE
Trim Kellyguard Valves
Rubber Goods Storage for Checkguard
and Kellyguard Valves
Hydril’s Kellyguard is a drill stem valve. Drill stem
valves facilitate well control and prevent mud spillage.
Hydril produces Kellyguard valves to service both the
traditional and top drive drilling applications. For
traditional applications, they are attached above and
below the kelly to close the bore to upward flow from
the well, or downward flow while making a connection.
For top drive applications, Hydril specializes in dual
crank actuator driven valves.
The term rubber goods includes synthetic compounds, such as Nitrile Copolymers and Neoprene, as well as
natural rubber parts.
The ideal storage situation for rubber goods would be in vacuum-sealed containers maintained in a cool, dry, dark
storage area. Atmosphere, light, and heat accelerate deterioration of rubber goods. The term aging means
cumulative effects of all three attacking agents over a period of time. The rubber goods are also affected by
stretching or bending from normal shape, extreme cold, or chemical reactions with solvents and petroleum
products.
The following recommendations will allow vendors and users of oil field equipment to maximize normally available
storage facilities for rubber goods.
Upper Kellyguard valves are well suited for high flow
rates, low to high-pressure sealing, and high tensile
loads imposed upon upper kelly cocks. The upper
Kellyguard valve has left hand-threaded connections,
compatible with the swivel and upper kelly connections.
The upper Kellyguard valve is used to close the bore if
the drill string becomes stuck with the kelly in the rotary
table.
1. Keep the rubber storage area as dark as possible
– preferably indoors, not outdoors, and away from
direct sunlight, skylights, windows, and direct
artificial lighting. The ultraviolet content of the light
spectrum accelerates cracking.
2. Select a cool location (ideally below 90°F) that is
away from heaters, stoves and direct blasts of
space heaters. Heat causes a gradual hardening of
rubber goods. The process is greatly accelerated
when ozone or oxygen is present. In extremely cold
climates, some rubber goods become so brittle
they will shatter when dropped or handled roughly.
3. Keep rubber goods away from electrical machinery
(motors, switch gear, or any high voltage
equipment producing corona). Avoid locations
susceptible to drafts that will carry the atmosphere
from electrical machinery to the rubber goods
storage area.
Exposure to the atmosphere allows ozone (O3), a
very active form of oxygen, to react with and be
especially detrimental to rubber goods. Two
principal sources of ozone are (1) atmospheric
ozone, and (2) ozone created by electrical
discharges such as lighting, high voltage corona,
and electrical machinery. Points of strain in rubber
goods attacked by ozone are characterized by a
hard skin, which eventually crazes into small
cracks and may turn chalky or assume a bark-like
appearance.
4. The practice of first-in, first-out inventory
management is essential with rubber goods.
5. Store rubber goods in a relaxed position in their
normal shape. Stretching or bending rubber goods
will result in accelerated aging or cracking. For
example, do not hang o-rings on pegs, glands,
BOP testers, or operator parts. Periodically inspect
to detect aging signs and treat the rubber goods
that must be stored in a stretched attitude with age
resistant compounds.
6. Rubber goods storage areas should be kept as dry
as possible. Remove oil, grease or other foreign
materials from the storage area to preclude
spillage on rubber goods. Rubber goods, both
Lower Kellyguard valves are rated for the rugged
applications of lower kelly cocks, including low and
high-pressure sealing, high tensile strength, and high
torsional strength. They have right hand threaded
connections to mate with the lower kelly end and with
drill pipe tool joints. The lower Kellyguard valve is
positioned below the kelly to close the drill stem bore to
hold a kick while preparing to circulate the kick out. It
can also be used as a mud saver.
Mud saver is the term applied to a lower Kellyguard
valve when it is used to save drilling fluid during a
connection. It saves mud costs and improves safety by
reducing slippery mud on the rig floor.
Drill pipe safety valves are lower Kellyguard valves
with connections to mate with the drill pipe tool joint.
Ratings are the same as lower Kellyguard valves. The
valve assists stabbing operations due to its low
operating torque for easy closing of the valve. When
required, the open valve is stabbed onto the top tool
joint, made-up, and manually closed. It is stored in the
open position on the rig floor.
© 2003 Hydril Company LP All Rights Reserved.
2
Seals
The Kellyguard valve is designed for 10,000 or 15,000
psi working pressure. It is tested at the factory to
15,000 or 22,500 psi. Hydril has selected high quality
materials and dimensional fits to ensure greatest
reliability. Each valve has three elastomeric sealing
areas: between each seat and body, between crank
and sleeve and between sleeve and body. The seat
7.
A)
B)
C)
D)
natural and synthetic, possess some degree of
susceptibility to deterioration from various solvents,
especially oil field liquid hydrocarbons, which
cause swelling/shrinkage.
If storage for extended periods is anticipated,
sealed containers are recommended. Impervious
surface coverings are recommended. Impervious
surface coverings such as waxing will increase
shelf life.
Since the aging of a rubber product is dependent
upon all of the above factors plus its size, specific
composition, and function, no precise figure is
available for "storage life." Generally, the greater
the ratio of surface area to volume, the more
susceptible a part is to being rendered useless by
aging. For example, a relatively large part (by
volume), such as a packing unit, might be expected
to have a much longer useful shelf life than a large
diameter O-ring.
No general rule can be drawn regarding usability. A
large, heavy part might suffer the same total
amount of aging as a small, light piece and still be
useful, whereas the light piece would be rendered
useless. Thus, judgment becomes the rule and
where there is doubt, replace the part.
Prior to using rubber goods that have been stored
for periods of time, these checks should be made:
Is there "chalking" or "barking"?
Has the part developed a "hard skin"?
Do cracks appear? (Sometimes cracks will be
obvious; stretch or bend the part in question so that
any incipient cracks or very thin cracks will be
revealed.)
Will a suspect part pass a hardness test? (In the
event that the hardness runs 15 points higher than
the normal hardness of the part, it is considered
non-usable.) Note: Hardness is affected by temperature, and readings should be taken with the
rubber part at 70°F.
19
RUBBER GOODS STORAGE
TABLE
1-800-999-1601
TOLL FREE IN THE U.S.A. AND CANADA
http://www.hydril.com
Headquarters
Hydril Company
P.O. Box 60458 ▼ Houston, TX 77205-0458
3300 N. Sam Houston Parkway East ▼ Houston, TX 77032-3411
Telephone: (281) 449-2000 ▼ Fax: (281) 985-3353
Drill Stem Valves
KELLYGUARD™ DRILL STEM VALVES • CHECKGUARD® VALVES
CATALOG DSV 2003 (REPLACES CATALOG PC 9701A)
For a Hydril Sales, Service or Manufacturing location nearest you,
please check our website at www.hydril.com/locations
R
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