The document provides specifications and operating instructions for Cameron U Blowout Preventers (BOPs) used in surface oil and gas drilling applications. It includes dimensional drawings and specifications for various sizes of single and double U BOPs with different pressure ratings. The document outlines procedures for disassembly, assembly, operation, installation, maintenance, testing and storage of the equipment. It also provides specifications for related BOP components like rams, seals, and control systems.
3. PREFACE
The procedures included in this book are to be performed in conjunction with
the requirements and recommendations outlined in API Specifications. Any repairs to the equipment covered by this book should be done by an authorized
Cameron service representative. Cameron will not be responsible for loss or expense resulting from any failure of equipment or any damage to any property or
injury or death to any person resulting in whole or in part from repairs performed by other than authorized Cameron personnel. Such unauthorized repairs shall also serve to terminate any contractual or other warranty, if any, on
the equipment and may also result in equipment no longer meeting applicable
requirements.
File copies of this manual are maintained. Revisions and/or additions will be
made as deemed necessary by Cameron. The drawings in this book are not
drawn to scale, but the dimensions shown are accurate.
This book covers Cameron U Blowout Preventers, which are products of Cooper
Cameron Corporation.
Cooper Cameron Corporation
Cameron Division
P.O. Box 1212
Houston, Texas 77251-1212
713-939-2211
http://www.coopercameron.com
TC1403
3
6. The capital letters in the following designations refer to the U BOP dimensional views below and dimensional charts shown on the following page.
A-1
A-2
A-3
A-4
B-1
B-2
C
Length - bonnets closed, locking screws locked
Length - bonnets opened, locking screws unlocked
Length - bonnets closed, with wedgelocks
Length - bonnets opened, with wedgelocks
Height - flanged
Height - clamp hubs
Width - no side outlets
D
E-1
E-2
F-1
F-2
G
Centerline of preventer to outlet flange or hub face. This distance is variable
and must be determined per individual specifications.
Centerline of side outlet to bottom flange face
Centerline of side outlet to bottom hub face
Top of ram to top flange face
Top of ram to top hub face
Height of ram
C
D
A
F
OPEN
B
G
E
Single U BOP
SD-017499
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6
8. The capital letters in the following designations refer to the U BOP dimensional views below and dimensional charts shown on the following page.
A-1
A-2
A-3
A-4
B-1
B-2
C
D
Length - bonnets closed, locking screws locked
Length - bonnets opened, locking screws unlocked
Length - bonnets closed, with wedgelocks
Length - bonnets opened, with wedgelocks
Height - flanged
Height - clamp hubs
Width - no side outlets
Centerline of preventer to outlet flange or hub face. This distance
is variable and must be determined per individual specifications.
E-1 C enterline of side outlet below rams to bottom flange face
E-2 Centerline of side outlet below rams to bottom hub face
F-1 Top of upper ram to top flange face
F-2 Top of upper ram to top hub face
G Height of ram
H-1 Centerline of side outlet between rams to bottom flange face
H-2 Centerline of side outlet between rams to bottom hub face
J
Top of lower ram to bottom of upper ram
C
D
A
F
OPEN
G
J
B
OPEN
G
H
E
Double U BOP
SD-017498
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8
16. U BOP Hydraulic Control System
The U blowout preventer is designed so that hydraulic pressure opens and closes the rams
and provides the means for quick ram change-out.
Ram closing pressure closes the rams. When the bonnet bolts are removed, closing
pressure opens the bonnet. After the bonnet has moved to the fully extended position,
the ram is clear of the body. An eyebolt can be installed in the top of each ram to lift it
out of the preventer.
Ram opening pressure opens the rams. Following ram change-out, this pressure closes
the bonnets. The rams are pulled outward, near the bonnets before the bonnets begin
moving toward the preventer body. This assures that the rams never obstruct the bore or
interfere with the pipe in the hole. Hydraulic pressure draws the bonnets tightly against
the preventer body and the bonnet bolts are reinstalled to hold the bonnets closed.
U Blowout Preventer Hydraulic Control System
SD-017501
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16
17. U BOP Operating data and Fluid Requirements
Bore Size and
Working
Pressure
Gals to Open
Pipe Rams
(1 Set)
Large Bore Shear Bonnet Operating Data and Fluid Requirements
Gals to Close
Locking
Closing Opening
Pipe Rams Screw Turns
Ratio
Ratio
(1 Set)
(Each End)
Bore Size and
Working
Pressure
7-1/16” All WP
1.3
1.3
18
6.9:1
2.2:1
7-1/16” All WP
11” Except 15,000 psi
3.4
3.5
27
7.3:1
2.5:1
11” Except 15,000 psi
Gals to Open
Pipe Rams
(1 Set)
Gals to Close
Pipe Rams
(1 Set)
Locking
Screw Turns
(Each End)
Closing
Ratio
Opening
Ratio
-
-
-
-
-
6.8
6.9
27
12.0:1
4.8:1
11” 15,000 psi
5.7
5.8
32
9.8:1
2.2:1
11” 15,000 psi
8.9
9.0
32
15.2:1
3.7:1
13-5/8” Except 15,000 psi
5.5
5.8
32
7.0:1
2.3:1
13-5/8” Except 15,000 psi
10.5
10.9
32
10.8:1
4.5:1
13-5/8” 15,000 psi Model B
10.4
10.6
45
10.6:1
3.6:1
13-5/8” 15,000 psi Model B
16.0
16.2
45
16.2:1
6.0:1
16-3/4” 3000 psi Model B
9.8
10.6
38
6.8:1
2.3:1
16-3/4” 3000 psi Model B
18.2
19.0
38
10.4:1
4.4:1
16-3/4” 5000 psi Model B
9.8
10.6
38
6.8:1
2.3:1
16-3/4” 5000 psi Model B
18.2
19.0
38
10.4:1
4.4:1
16-3/4” 10,000 psi
11.6
12.5
45
6.8:1
2.3:1
16-3/4” 10,000 psi
18.2
19.1
45
10.4:1
4.4:1
18-3/4” 10,000 psi
21.3
23.1
54
7.4:1
3.7:1
18-3/4” 10,000 psi
-
-
-
-
-
20-3/4” 3000 psi
8.1
8.7
46
7.0:1
1.3:1
20-3/4” 3000 ps
14.3
14.9
46
10.8:1
1.7:1
21-1/4” 2000 psi
9.0
8.7
46
7.0:1
1.3:1
21-1/4” 2000 psi
14.3
14.9
46
10.8:1
1.7:1
21-1/4” 5000 psi
27.3
30.0
54
7.2:1
4.0:1
21-1/4” 5000 psi
-
-
-
-
-
21-1/4” 10,000 psi
24.5
26.9
51
7.2:1
4.0:1
21-1/4” 10,000 psi
-
-
-
-
-
26-3/4” 3000 psi
10.1
10.8
58
7.0:1
1.0:1
26-3/4” 3000 ps
-
-
-
-
-
U BOP Operating data and Fluid Requirements
Bore Size and
Working
Pressure
Large Bore Shear Bonnet Operating Data and Fluid Requirements
Litres to Open Litres to Close
Locking
Closing Opening
Pipe Rams
Pipe Rams Screw Turns
Ratio
Ratio
(1 Set)
(1 Set)
(Each End)
Bore Size and
Working
Pressure
Litres to Open
Pipe Rams
(1 Set)
Litres to Close
Pipe Rams
(1 Set)
Locking
Screw Turns
(Each End)
Closing
Ratio
Opening
Ratio
7-1/16” All WP
4.9
4.9
18
6.9:1
2.2:1
7-1/16” All WP
-
-
-
-
-
11” Except 15,000 psi
12.9
13.2
27
7.3:1
2.5:1
11” Except 15,000 psi
25.7
26.1
27
12.0:1
4.8:1
11” 15,000 psi
21.6
22.0
32
9.8:1
2.2:1
11” 15,000 psi
33.7
34.1
32
15.2:1
3.7:1
13-5/8” Except 15,000 psi
20.8
22.0
32
7.0:1
2.3:1
13-5/8” Except 15,000 psi
39.7
41.3
32
10.8:1
4.5:1
13-5/8” 15,000 psi Model B
39.4
40.1
45
10.6:1
3.6:1
13-5/8” 15,000 psi Model B
60.6
61.3
45
16.2:1
6.0:1
16-3/4” 3000 psi Model B
37.1
40.1
38
6.8:1
2.3:1
16-3/4” 3000 psi Model B
68.9
71.9
38
10.4:1
4.4:1
16-3/4” 5000 psi Model B
37.1
40.1
38
6.8:1
2.3:1
16-3/4” 5000 psi Model B
68.9
71.9
38
10.4:1
4.4:1
16-3/4” 10,000 psi
43.9
47.3
45
6.8:1
2.3:1
16-3/4” 10,000 psi
68.9
72.3
45
10.4:1
4.4:1
18-3/4” 10,000 psi
80.6
87.4
54
7.4:1
3.7:1
18-3/4” 10,000 psi
-
-
-
-
-
20-3/4” 3000 psi
30.7
32.9
46
7.0:1
1.3:1
20-3/4” 3000 ps
54.1
56.4
46
10.8:1
1.7:1
21-1/4” 2000 psi
34.1
32.9
46
7.0:1
1.3:1
21-1/4” 2000 psi
54.1
56.4
46
10.8:1
1.7:1
21-1/4” 5000 psi
103.3
113.6
54
7.2:1
4.0:1
21-1/4” 5000 psi
-
-
-
-
-
21-1/4” 10,000 psi
92.7
101.8
51
7.2:1
4.0:1
21-1/4” 10,000 psi
-
-
-
-
-
26-3/4” 3000 psi
38.2
40.9
58
7.0:1
1.0:1
26-3/4” 3000 ps
-
-
-
-
-
TC1403
17
18. U BOP Specifications and Accessories
The following specifications apply to typical Cameron U type BOPs. Your Cameron representative can provide information on non-standard BOP assemblies.
• Side outlets to 4-1/16” (7-1/16” on 26-3/4” BOPs) can be provided beneath each set
of rams on either or both sides of U BOPs. Side outlets can be studded, open-face
flange or clamp hub with the same pressure rating as the vertical run connections.
• Flanges conform to API standard 6A and/or 16A. Hubs conform to API 16A or
applicable standards. Type 6BX flanges are standard for 10,000 and 15,000 psi
working pressures and for 5000 psi for 13-5/8” and larger bore BOPs.
• Hydraulic control connections for operation of rams and bonnets are 1” NPT. There
are two connections for each set of rams. Wedgelock connections are ½” NPT.
U BOP Standard Accessories
Size and Working Pressure
Ram Lube*
Cameron Box Wrench*
Allen Wrench* Packing
Screw
Handwheel**
Universal Joint**
Extension Wrench*
7-1/16” 3000 psi
713878
713114-08
8721-01
5457
6018-01
5652
7-1/16” 5000 psi
713878
7957-06
8721-01
5457
6018-01
5652
7-1/16” 10,000 and 15,000 psi
713878
713114-10
8721-01
5457
6018-01
5652
11” 3000, 5000 and 10,000 psi
713878
713114-10
8721-01
5298
6018-03
5526
11” 15,000 psi
713878
713114-13
8721-01
5298
6018-03
5526
13-5/8” 3000 and 5000 psi
713878
7959-08
8721-01
5298
6018-03
5526
13-5/8” 10,000 psi
713878
713114-10
8721-01
5298
6018-03
5526
13-5/8” 15,000 psi
713878
***
8721-01
5298
6018-03
5526
16-3/4” 3000 and 5000 psi
713878
713114-13
8721-01
5298
6018-03
5526
16-3/4” 10,000 psi
713878
***
8721-01
5298
6018-03
5526
18-3/4” 10,000 psi
713878
***
8721-01
5298
6018-03
5526
20-3/4” 3000 psi
713878
713114-08
8721-01
5298
6018-03
5526
21-1/4” 2000 psi
713878
713114-10
8721-01
5298
6018-03
5526
21-1/4” 5000 psi
713878
***
8721-01
5298
6018-03
5526
21-1/4” 10,000 psi
713878
***
8721-01
5298
6018-03
5526
26-3/4” 10,000 psi
713878
713114-13
8721-01
5298
6018-03
5526
*One required. **Two required for single preventer, four for double preventer. ***Commercially available sockets are recommended.
TC1403
18
19. Large Bore Shear Bonnets
12A**
2A
24A
5A
42A
26A
Large Bore Shear Ram
Bonnet Assembly
3A
SD-017503
Large Bore Shear Bonnet Part Numbers
Item
No.
Description
(2 Required per Cavity)
11”
3000 psi
Model II
11”
5000 psi
Model II
11”
10,000 psi
Model II
11”
15,000 psi
Model 79
13-5/8”
3000 psi
Model 11
13-5/8”
5000 psi
Model II
13-5/8”
10,000 psi
Model II
13-5/8”
15,000 psi
Model B
16-3/4”
5000 psi
Model B
16-3/4”
10,000 psi
Model II
20-3/4”
3000 psi
Model II
21-1/4”
2000 psi
Model II
*
Bonnet Assembly (Right)
615195-01
615194-01
614596-01
615419-01
615196-01
615191-01
614498-01
615540-01
615530-01
615537-01
615526-01
615525-01
*
Bonnet Assembly (Left)
615195-02
615194-02
614596-02
615419-02
615196-02
615191-01
614498-02
615540-02
615530-02
615537-02
615526-02
615525-02
615523-01
2A
Intermediate Flange/Shear
615188-01
615188-01
615188-01
615459-01
615192-01
615192-01
614766-01
615538-01
615528-01
615535-01
615523-01
3A
Bonnet/Shear
615189-03
615189-02
615189-01
615640-01
615143-02
615143-01
614772-01
615448-01
615527-01
615534-01
615522-01
615522-02
5A
Operating Piston/Shear
645249-01
645249-01
645249-01
615457-01
615209-01
615209-01
614760-01
615539-01
615529-01
615536-01
615524-01
615524-01
24A O-Ring, Int Flg to Bonnet Lip
26A Lip Seal, Operating Piston/Shear
42A Wear Ring, Operating Piston/Shear
702640-45- 702640-45- 702640-45- 702640-45- 702640-45- 702640-45- 702640-45- 702645-46- 702645-46- 702645-46- 702640-45- 702640-4551
51
51
81
81
81
81
51
51
51
81
81
710586
710586
710586
710542
710542
710542
710542
710588
710588
710588
710542
710542
49223-15
49223-15
49223-15
49223-04
49223-04
49223-04
49223-04
49223-17
49223-17
49223-17
49223-14
49223-14
**Two shear bonnet assemblies, one right and one left, are required per cavity. The shear bonnet assembly consists of all items shown on the illustration.
**See pages 11, 13 and 15 for bonnet bolt part numbers.
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19
20. Tandem Boosters for U BOPs
A BOP equipped with tandem boosters can deliver increased shearing force while not increasing the wear and tear on the packers. Tandem boosters approximately double the
force available to shear pipe. Since the tailrod of the tandem booster has the same stroke
as the BOP’s operating piston, the standard shear locking mechanism can be installed on
the outside end of the booster. For information on lock screws and the required spacers,
see pages 11, 13, and 15.
For information concerning applications where a tandem booster is required, consult
your Cameron representative.
7
17
11
12
10
4
9
16
13
2
5
6
1
8
15
14
3
Tandem Booster Assembly
23
Item
No.
Description
SD-017504
7-1/16” 3000, 5000, 10,000 and
15,000 psi*
Qty
Part Number
11’ 3000, 5000, and 10,000 psi
Qty
Part Number
11’ 15,000 psi
13-5/8” 3000, 5000 and 10,000 psi
Qty
Part Number
20-3/4” 3000 psi and
21-1/4” 2000 psi
Qty
Part Number
1
Cylinder
1
644959-01
2
645113-01
2
645113-03
2
645113-04
2
Cylinder Head
1
644960-01
2
645171-01
2
645171-03
2
645171-03
3
Piston
1
644961-01
2
2032370-02
2
645172-03
2
645172-03
4
Tailrod
1
644962-01
2
645173-01
2
645173-03
2
645173-04
5
Adapter Plate
1
644963-01
2
645115-01
2
645115-03
2
645115-03
6
Screw, SDC HD Cap
8
18541-34
16
18542-13
16
18542-14
16
18542-14
7
O-Ring
1
702640-24-91
2
702640-36-11
2
702645-37-11
2
702645-37-11
8
Seal Ring
1
710541
2
712352
2
710538
2
710538
9
Wear Ring, Operating Piston
1
49223-03
2
49223-21
2
49223-01
2
49223-01
10
Filter, Muffler
1
710621
2
710621
2
710417
2
710417
11
Seal, Lip
1
11741-32
2
212741-33-00-01
2
212741-34-00-01
2
212741-34-00-01
12
Seal Ring
1
710620
2
712351
2
710419
2
710419
13
Wear Ring, Cylinder
1
644443-02
2
644443-03
2
645215-01
2
645215-01
14
Seal Ring
1
705955
2
712445
2
710418
2
710418
15
O-Ring
1
702640-33-11
2
702640-33-51
2
702640-33-71
2
702640-33-71
16
Alignment Ring
1
645116-02
2
645116-01
2
645116-03
2
645116-03
17
Pipe Plug
1
2
201018
2
005930-05-10
2
005930-05-10
18
Connector, Tubing
1
19624-01
2
4
204887-10-06-57
4
204887-10-06-57
19
Cross
1
6347-08
1
675029-52
1
675029-23
2
675029-23
20
Nipple, Pipe Regular
2
1
685902-07-00-30
1
685902-07-00-30
1
685902-07-00-30
21
Hose Assembly
2
711010
2
2708021
2
711374
2
711374
22
Connector, Tubing
1
204888-08-05-56
2
204887-10-05-56
-
-
-
-
23
Stud, Double End
-
16
2010189-03
-
-
-
-
26
Connector, Tubing
1
2
204887-10-06-56
-
-
-
-
27
Adapter, Pipe
-
2
675029-01
-
-
-
-
-
-
501133-71-22
-
-
*The 7-1/16” tandem booster is a part of the standard land and platform shear configuration for 7-1/16” U BOPs.
TC1403
20
21. U BOP Ram Hang-Off Weights and
Shear Requirements
Hang-Off Weights
Hang-off weights are estimated capacities with
Pipe Size
Pipe Rams
hardened top corners of the hang-off rams. This
3-1/2”
300,000 lb (136,078 kg)
4-1/2”
300,000 lb (136,078 kg)
enables the rams to dig into the tool joint and
5”
600,000 lb (272,155 kg)
provide superior hang-off capacity while still
6-5/8”
600,000 lb (272,155 kg)
meeting NACE requirements.
For variable bore rams (VBRs) and
FLEXPACKER rams, hang-off weights up to 300,000 lb (136,078 kg) on hang-off rams for
the lower pipe size in the range, 600,000 lb (272,155 kg) for the larger pipe size in the
range.
Drill Pipe Shearing Requirements
The minimum shearing configurations needed for each size U BOP to meet the requirements of the second edition of API 16A are listed in the following chart. Each shearing
configuration is capable of shearing the corresponding pipe at a closing pressure equal to
or less than 2800 psi. For further information on shearing requirements for different pipe
sizes and grades, contact your Cameron representative.
Minimum Shearing Configurations for the U BOP
API Designated Size
Ram Type
Pressure Rating (psi)
Pipe OD (In.)
Pipe lb/ft
Pipe Grade
7-1/16”
SBR
All
3-1/2
13.3
S
Shear Bonnets with Tandem Boosters
11”
SBR
10,000 and Lower
5
19.5
E
Shear Bonnets with Tandem Boosters
11”
DS
10,000 and Lower
5
19.5
E
Large Bore Shear Bonnets
11”
SBR
15,000 and Higher
5
19.5
G
Large Bore Shear Bonnets
13-5/8”
SBR
10,000 and Lower
5
19.5
G
Shear Bonnets with Tandem Boosters
13-5/8”
DS
10,000 and Lower
5
19.5
G
Large Bore Shear Bonnets
13-5/8”
SBR
15,000 and Higher
5
19.5
S
Large Bore Shear Bonnets
16-3/4”
SBR
All
5
19.5
S
Large Bore Shear Bonnets
18-3/4”
SBR
All
5
19.5
S
Standard Bonnets
20-3/4”
SBR
3000 and Lower
5
19.5
G
Shear Bonnets with Tandem Boosters
21-1/4”
SBR
3000 and Lower
5
19.5
G
Shear Bonnets with Tandem Boosters
21-1/4”
SBR
5000 and Higher
5
19.5
S
Standard Bonnets
Note: See pages 19 and 20 for a complete list of part numbers for the large bore shear bonnets and tandem boosters.
TC1403
21
Shearing Configuration
22. U BOP Pipe Rams
Pipe rams are available for use in Cameron U BOPs to fit all commonly used sizes of tubing, drill pipe, drill collar or casing within the ranges in the charts on pages 23, 24, and 25.
Cameron pipe rams include the following features:
• Cameron pipe rams are self-feeding and incorporate a large reservoir of packer
rubber to ensure a long-lasting seal under all conditions.
• Ram packers lock into place and are not dislodged by well flow.
• All Cameron pipe rams are suitable for H2S service per NACE MR-01-75.
• CAMRAM™ top seals are standard for all U BOP pipe rams from 7-1/16” through
18-3/4” sizes. Packer part numbers beginning with 644xxx indicate the CAMRAM
lipped-plate design. All other packers use standard elastomer material and
reinforcement plates.
• CAMRAM 350™ packers and top seals are available for high temperature service and
for service in which concentrations of H2S are expected.
Top Seal
U BOP Pipe Ram
SD-017508
Packer
Ram
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22
26. U BOP Shearing Blind Rams
Cameron shearing blind rams shear the pipe in the hole, then bend the lower section of
sheared pipe to allow the rams to close and seal. Shearing blind rams can be used as blind
rams during normal drilling operations.
The DS shearing blind ram can cut larger diameter tubulars or multiple tubing strings
regardless of their orientation to the centerline of the ram. A blade seal between the upper and lower faces eliminates the need for moving pipe after shearing.
Features of shearing blind rams and DS rams include:
• Large frontal area on the blade face seal reduces pressure on the rubber and
increases service life.
• Cameron SBRs can cut pipe numerous times without damage to the cutting edge.
• The single-piece body incorporates an integrated cutting edge.
• CAMRAM™ top seals are standard for all U BOP shearing blind rams through
18-3/4”. Part numbers beginning with 644xxx indicate CAMRAM. All other top seals
are standard elastomer material.
• H2S SBRs are available for critical service applications and include a blade material of
hardened high alloy suitable for H2S service.
• The Cameron shearing blind ram has a single-piece body with an integrated cutting
edge.
TC1403
26
27. U BOP H2S Shearing Blind Ram Part Numbers
6
8
13
10
12
15
5
7
2
3
1
4
11
14
9
U BOP H2S Shearing Blind Ram
SD-017509
BOP Bore Size and
Working Pressure (psi)
1
Upper Ram
Subassembly
2
Ram
3
Blade Packer
4
Packer
5
Packer
6
Top Seal
7
Blade Insert
13-5/8” 5000 and 10,000
644781-01
644780-01
644435-01-00-01
46751-01-00-01
46752-01-00-01
644223-01-00-01
644581-01-00-01
18-3/4” 10,000
2010186-01
2010187-01
2010192-01
2010191-01
2010190-01
2010193-01
2010182-01
BOP Bore Size and
Working Pressure (psi)
8
Set Screw
9
Lower Ram
Subassembly
10
Ram
11
Packer
12
Packer
13
Top Seal
14
Blade Insert
13-5/8” 5000 and 10,000
644582-01
644781-02
644780-02
46751-01-00-01
46752-01-00-01
644233-01-00-01
644581-02-00-01
18-3/4” 10,000
644524-01
2010186-02
2010188-01
2010191-01
2010190-01
2010193-01
2010183-01
Part number 15 for both sizes is 200231.
TC1403
27
28. U BOP DS Shearing Blind Ram**
6
1
5
7
3
4
4
DS Shearing Blind Ram
SD-017512
Description and Item Number
BOP Bore Size and Working
Pressure
1
Upper Ram
Subassembly
2
Ram
3
Blade Seal
4
Packer
5
Packer
6
Top Seal
7
Lower Ram
Subassembly
8
Ram*
9
Packer*
10
Packer*
11” 5000 and 10,000 psi
645078-01
645079-01
645031-02
645080-02
645080-01
644217-02
645078-02
645079-02
645080-01
6545080-02
13-5/8” 5000 and 10,000 psi
645026-01
645027-01-00-04
645031-01
645494-01
645494-02
645033-01
645026-02
645027-02-00-04
645494-01
645494-02
**Part of lower ram subassembly, item 7.
**Part numbers listed are the primary base numbers. Call your Cameron representative for part numbers that apply to API 16A specifications.
TC1403
28
30. U BOP DSI and DVS Shear Rams
Dual string interlocking (DSI) shear rams and double V shear (DVS) rams are also available
for the U BOP. The interlocking feature of these rams provides the capability of shearing
wireline and braided cable with zero tension in the line, while still maintaining a seal. The
blades are interlocked by using pockets in the lower ram and arms on the upper ram to
prevent any gap between blade surfaces.
DSI rams are similar to standard DS shear rams except for the interlock feature. DSI
shear rams are capable of shearing tubing, small pipe, braided cable, slickline and solid
sinker bar.
DVS rams are similar in design to the standard shearing blind rams except that both
blades are V shaped and interlocked. The DVS rams are capable of shearing tubing, small
pipe, braided cable and slickline.
TC1403
30
31. Top Seal
Upper Ram Body
Lower Ram Body
Blade Packer
Side Packer
Double V Shear (DVS) Shear Rams
Top Seal
Upper Ram Body
Side Packer
Upper Shear Ram
Lower Ram Body
Blade Seal
Upper Shear Ram
Side Packer
Lower Shear Ram
Dual String Interlocking (DSI) Shear Rams
SD-017525
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31
32. U BOP Variable Bore Rams
One set of Cameron variable bore rams seals on several sizes of pipe or hexagonal kelly.
Variable bore rams are available in the size ranges listed in the chart below. All rams listed
are suitable for H2S service per NACE MR-01-75.
CAMRAM top seals are standard for all U BOP variable bore rams. CAMRAM packers
are available in most sizes. Packer part numbers beginning with 644xxx indicate
CAMRAM. All other packers are standard elastomer material.
The variable bore ram packer contains steel reinforcing inserts similar to those in the
Cameron annular BOP packer. The inserts rotate inward when the rams are closed so the
steel provides support for the rubber which seals against the pipe.
SD-5129
BOP Size and Working Pressure (psi)
Pipe Size Range
Ram Subassembly
Ram Body
Packer
Top Seal
7-1/16” 3000, 5000, 10,000 and 15,000
3-1/2” to2-3/8”
615066-01
615065-01
614616-02
644214-02-00-01
7-1/16” 3000, 5000, 10,000 and 15,000
4” to 2-7/8”
644901-01
614605-01
614616-02
644214-02-00-01
11” 3000, 5000
5” to 2-7/8”
645360-01
644836-01
644926-01-00-01
644217-01-00-01
11” 3000, 5000, and 10,000
5” to 3-1/2”
645360-01
644836-01
644926-01-00-01
644217-01-00-01
11” 15,000
5” to 2-7/8”
614456-01
644754-01
644931-01
2010453-02
13-5/8” 3000, 5000, and 10,000
7” to 4-1/2”
46675-01
46671-01
644921-01-00-02
644223-02-00-01
13-5/8” 3000, 5000, and 10,000
644223-02-00-01
5” to 2-7/8”
645166-01
644744-01
645089-01
13-5/8” 15,000
7” to 5”
614104-01
614146-01
644924-02
644226-02
13-5/8” 15,000
5” to 3-1/2”
614129-01
644745-01
644921-01
644226-02
16-3/4” 5000 and 10,000
7” to 3-1/2”
46676-01
46672-01
644920-01-00-01
644229-01-00-01
16-3/4” 10,000 (only)
5” to 2-7/8”
49410-01
644746-01
645128-01-00-01
644229-01-00-01
7-5/8” to 3-1/2”
46677-01
46673-01
644927-01
644232-03-00-01
18-3/4” 10,000
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32
33. Flexpackers for U BOPs
The Cameron FLEXPACKER ram is designed to close and seal around several diameters of
tubing and pipe. These packers can be used in existing Cameron BOPs. Features include:
• Stacks of metal inserts bonded into the elastomer move radially in the elastomer as
the BOP rams are closed.
• As rams are energized, the proper set of metal inserts is forced against the pipe. The
top plate of the packer fits the largest diameter of pipe.
SD-10315
FLEXPACKER Sizes and Part Numbers
Pipe Size Diameters
Packer Part Number
Top Seal Part Number
11” 3000, 5000 and 10,000 psi
BOP Size and Description
2-3/8” to 3-1/2”
2010123-01
644217-01-00-01
11” 3000, 5000 and 10,000 psi
2-3/8” to 3-1/2”
2011740-01
11” 3000, 5000 and10,000 psi
3-1/2” to 5”
2163445-01
13-5/8” 3000, 5000 and 10,000 psi
2-3/8” to 3-1/2”
2010113-01
13-5/8” 3000, 5000 and 10,000 psi
2-3/8” to 3-1/2”
2011716-01
13-5/8” 3000, 5000 and 10,000 psi
3-1/2” to 5”
2011673-01
13-5/8” 3000, 5000 and 10,000 psi
5” to 6-5/8”
2011688-01
18-3/4” 10,000 psi
2-7/8” to 5”
645346-01
18-3/4” 10,000 psi
3-1/2” - 5”
2011701-01
18-3/4” 10,000 psi
644223-01-00-01
644232-04
5” to 6-5/8”
2011907-01
20-3/4” 3000 psi
5” to 7”
645353-01
19514-00-00-01
21-1/4” 2000 psi
5” to 7”
645353-01
19514-00-00-01
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33
34. CAMRAM 350 Packers and Top Seals for U BOPs
CAMRAM 350 U BOP pipe ram packers and top seals are available for applications which
require high temperature capabilities and greater H2S resistance than standard CAMRAM
packers and top seals.
CAMRAM 350 is available in all U BOP sizes in which standard CAMRAM packers and
top seals are offered. At present, only pipe sizes (up to 5-1/2”) are manufactured.
Camram 350
Top Seal
Camram 350
Packer
U BOP Camram 350 Packer and Top Seal
SD-017514
Pipe Size
(in.)
7-1/16”
3000 - 15,000 psi
Top Seal 644701-01
Packer
Packer
Packer
Packer
Packer
Packer
Packer
Blind
644700-01
644702-01
644704-01
644706-01
644708-01
644710-01
644712-01
2.375
644700-07
644702-06
644704-05
644706-06
644708-03
-
-
2.875
644700-08
644702-07
644704-06
644706-07
644708-04
644710-04
-
3.500
644700-09
644702-08
-
644706-08
644708-05
644710-05
644712-04
4.000
-
644702-10
-
644706-10
644708-07
644710-06
-
4.500
-
644702-11
644704-09
644706-11
-
644710-07
-
5.000
-
644702-14
644704-10
644706-14
644708-11
644710-09
644712-10
5.500
-
644702-16
-
644706-16
-
-
-
TC1403
11”
3000 - 10,000 psi
Top Seal 644703-01
11”
15,000 psi
Top Seal 644705-01
34
13-5/8”
3000 - 10,000 psi
Top Seal 644707-01
13-5/8”
15,000 psi
Top Seal 644709-01
16-3/4”
3000 - 10,000 psi
Top Seal 644711-01
18-3/4”
10,000 psi
Top Seal 644713-01
35. U BOP Rams for Multiple Completions
Non-sealing centralizing rams and companion subsea dual rams and packers for use with
two strings of the same diameter are available for the U BOP. Also available are offset
bore rams for 7-1/16” and 11” BOPs. Contact a Cameron representative for more information.
U Blowout Preventer Offset Bore Ram Part Numbers
Preventer Size
(in.)
Tubing Size
(in.)
Actual Centerline
Offset
(in.)
Offset Range
(in.)
Ram Assembly
Right-Hand Ram
(1 Reqd)
Left-Hand Ram
(1 Reqd)
Right-Hand Packer
(1 Reqd)
Left-Hand Packer
(1 Reqd)
Top Seal
(2 Reqd)
7-1/16
1.315
1-3/4
1-3/8 to 1-7/8
44229-01
44108-05
44109-05
21153-07
21154-07
644214-01-00-01
7-1/16
1.660
1-3/4
1-3/8 to 1-7/8
44229-02
44108-03
44109-03
21153-04
21154-04
644214-01-00-01
7-1/16
1.900
1-3/4
1-3/8 to 1-7/8
44229-03
44108-01
44109-01
21153-01
21154-01
644214-01-00-01
7-1/16
2-1/16
1-3/4
1-3/8 to 1-7/8
44229-04
44108-01
44109-01
21153-02
21154-02
644214-01-00-01
7-1/16
2-3/8
1-3/4
1-3/8 to 1-7/8
44229-05
44108-02
44109-02
21153-03
21154-03
644214-01-00-01
7-1/16
2-7/8
1-3/4
1-3/8 to 1-7/8
44229-06
44108-04
44109-04
21153-05
21154-05
644214-01-00-01
11
1.660
2
1-25/32 to 2-7/16
44238-01
44128-04
44129-04
21157-05
21158-05
644217-01-00-01
11
1.900
2-33/64
1-25/32 to 2-7/16
44238-02
44128-08
44129-08
21157-11
21158-11
644217-01-00-01
11
2-1/16
2
1-25/32 to 2-7/16
44238-04
44128-01
44129-01
21157-02
21158-02
644217-01-00-01
11
2-3/8
2-1/8
1-25/32 to 2-7/16
44238-05
44128-02
44129-02
21157-03
21158-03
644217-01-00-01
11
2-7/8
2
1-25/32 to 2-7/16
44238-07
44128-03
44129-03
21157-04
21158-04
644217-01-00-01
11
3-1/2
2
1-25/32 to 2-7/16
44238-08
44128-05
44129-05
21157-06
21158-06
644217-01-00-01
TC1403
35
36. Bonnet Rebuild Softgoods Kits
For popular size U BOPs, a bonnet rebuild softgoods kit is available to provide all parts required to reseal the operating system.
Kit parts are shrink-film packed to prevent loss and assure long shelf life. The kits are
less expensive than individual parts. All parts in each kit are identified with part numbers
and parts list index numbers.
24
42
28
34
26
24
32
31
30
27
33
18
21
25
19
20
U BOP Bonnet Softgoods Components
SD-017515
TC1403
36
37. Kit Part Numbers
BOP Size (in.)
7-1/16
Pressure Rating/Bonnet Type
Kit Part Number*
3000, 5000, 10,000 and 15,000 psi All
644909-01
11
3000, 5000, and 10,000 psi Pipe
644909-02
11
15,000 psi All
644831-08
13-5/8
3000, 5000, and 10,000 psi Pipe
644909-03
13-5/8
15,000 psi All
644831-12
16-3/4
5000 psi Pipe
644831-14
16-3/4
10,000 psi All
644831-15
18-3/4
10,000 psi All
644909-04
20-3/4
3000 psi Pipe
644831-17
21-1/4
2000 psi Pipe
644831-18
21-1/4
5000 psi All
644831-19
21-1/4
10,000 psi Pipe
644831-21
26-3/4
3000 psi All
644831-22
U BOP Bonnet Rebuild Softgoods Kit Components
Item Number*
Description
18
Ring, Plastic Energizing
20
Seal Ring, Connecting Rod
21
Ring, Backup
24
O-ring, Operating Cylinder
25
O-Ring, Operating Piston Rod to Intermediate Flange
26
Lip Seal, Operating Piston
27
Seal Ring, Tail Rod
28
O-Ring, Wiping
29
O-Ring, Ram Change Piston to Body
30
O-Ring, Ram Change Piston Rod to Intermediate Flange
31
O-Ring, Ram Change Cylinder to Intermediate Flange
32
O-Ring, Ram Change Piston to Bonnet
33
O-Ring, Ram Change Piston
34
O-Ring, Bonnet Bolt Retainer
39
Packing, Plastic**
42
TC1403
Ring, Plastic Packing
19
Wear Ring, Operating Piston
37
38. Bonnet Seals and Connecting Rod Seals
For applications where only bonnet and/or connecting rod seals are required, Cameron offers individually packaged components. Connecting rod seals are nitrile rubber. Bonnet
seals beginning with 644197 are the newest design.
When high temperature and/or high concentrations of H2S are expected, Cameron recommends the used of CAMLAST bonnet and connecting rod seals along with CAMRAM
350 packers and top seals.
U BOP Bonnet and Connecting Rod Seals
BOP Size
(in.)
Pressure Rating
(psi)
Bonnet Seal
Connecting Rod Seal
3000, 5000, 10,000, and 15,000
644197-01-00-01
212741-37-00-01
11
3000, 5000, and 10,000
644197-02-00-01
212741-38-00-01
11
15,000 Model 79
49272-03
212741-38-00-01
644197-03-00-01
212741-36-00-01
7-1/16
13-5/8
3000, 5000, and 10,000
13-5/8
15,000
49272-02
212741-36-00-01
16-3/4
3000, 5000, and 10,000
46613-04
212741-44
18-3/4
10,000
212741-60
3000
21-1/4
644197-05-00-01
644197-06
212741-36-00-01
2000
20-3/4
644197-06
212741-36-00-01
21-1/4
5000 and 10,000 Model 79
644197-08
11741-58
21-1/4
7500 and 10,000 Model II
644197-07
11741-58
26-3/4
3000
46613-08
212741-36-00-01
U BOP CAMLAST Bonnet and Connecting Rod Seals
BOP Size
Bonnet Seal
Connecting Rod Seal
7-1/16” 3000 to 15,000 psi
644573-01
212741-37
11” 3000 to 10,000 psi
644573-02
212741-38-00-01
11” 15,000 psi Model 79
644898-01
212741-38-00-01
13-5/8” 3000 to 10,000 psi
644573-03
212741-36-00-01
13-5/8” 15,000 psi
644898-02
212741-36-00-01
16-3/4” 3000 and 5000 psi Model B
644573-04
212741-44
16-3/4” 10,000 psi Model II
644573-04
212741-44
18-3/4” 10,000 psi
644573-05
212741-60
20-3/4” 3000 psi
644573-06
212741-36-00-01
21-1/4” 2000 psi
644573-06
212741-36-00-01
21-1/4” 5000 psi
644573-08
212741-36-00-01
21-1/4” 7500 and 10,000 psi Model II
644573-07
212741-36-00-01
21-1/4” 10,000 psi Model 79
644573-08
212741-36-00-01
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38
39. Bonnet Seal Carriers for U BOPs
The bonnet seal carrier is a bore-type
sealing assembly which replaces the face
seal used as the previous bonnet seal.
Sealing capability is not dependent upon
bonnet bolt torque. One seal is captured
in a machined bore in the BOP body
while the other seal is captured in a machined bore in the intermediate flange.
The seal carrier was designed, developed and performance-verified for use in
newly manufactured BOPs or as a replacement seal assembly for BOPs where
either the BOP body or the intermediate
flange requires weld repair on the sealing surfaces.
BOP Size
The bonnet seal carrier can be retrofitted to any U BOP.
Seal Carrier
Retainer Ring
Bonnet Seals
Qty
Part Number
Qty
Part Number
Qty
Part Number
11” 3000, 5000, and 10,000 psi
2
645464-02-00-01
2
702640-27-61
4
645484-02-00-01
13-5/8” 10,000 psi
2
645507-01-00-01
2
702645-27-91
4
645509-01-00-01
13-5/8” 15,000 psi
2
2010145-01
2
702645-27-71
4
2010146-01
18-3/4” 10,000 psi
2
2010185-01
2
702645-28-31
4
2010184-01
TC1403
39
40. U BOP Operation and Maintenance
(T-172, 2-99)
I. Physical Data
A. Lubricants
1. Ram lubricant, P/N 705725 (CHEMLOA #681 BOP oil) or a water resistant non
petroleum base grease.
2. Thread lubricant - which meets the requirements of the latest revision of API
Bulletin 5A or Moly #503, (P/N 705444, 4 lb can)
3. Multi-purpose lubricant or grease.
4. Multi-purpose lubricant or grease for cold weather operation.
5. Hydraulic operating system:
a. Storage - P/N 718100 (Marston Bentley Preservation Fluid.)
b. Standard operation - Use a fresh water lubricant that forms a true solution rather than an emulsion when mixed with water and/or antifreeze.
6. Seals and sealing surfaces - Hydraulic Oil (10-15 wt) P/N 203497.
B. Dimensional Drawings
1. SD-017499, Single U BOP.
2. SD-017498, Double U BOP.
C. Drawings with Bills of Material
1. SD-017500, Double U BOP.
2. SD-017503, Large Bore Shear Bonnet Assembly.
3. SD-017504, Tandem Booster Assembly.
4. SD-017508, Pipe Ram.
5. SD-017509, H2S Shearing Blind Ram.
6. SD-017512, DS Shearing Blind Ram.
7. SD-017513, Shearing Blind Ram.
8. SD-017525, DSI Shear Ram.
9. SD-017525, DVS Shear Ram.
TC1403
40
41. 10. SD-5129, Variable Bore Ram.
11. SD-10315, Flexpacker.
12. SD-017514, CAMRAM™ 350 Packer and Top Seal
13. SD-017515, Bonnet Softgoods Components.
D. Weights
Refer to pages 7 and 9.
E. Lifting and Handling
1. Lift BOP assemblies only with slings appropriately rated for the maximun
weight of the BOP.
2. Lift ram assemblies by installing a lifting eye, P/N 011849, in the threaded
preparation in the ram.
3. Handle all other subassemblies using appropriately rated slings.
F. External Thread Connections
Description
Size
Location
Open Port
1” NPT
BOP Body, Right Side
Close Port
1” NPT
BOP Body, Left Side
G. Hydraulic Operating System Requirements
1. Use a freash water lubricant in the hydraulic system that forms a true solution rather than an emulsion when mixed with water and/or antifreeze.
2. Refer to page 17 for fluid requirements.
3. Normal pressure for the hydraulic operating system is 1500 psi (103 Bars).
4. Maximum pressure to shear drill pipe is 2800 psi (193 Bars).
5. The maximum hydraulic operating pressure limit is 3000 psi (207 Bars) to operate rams.
TC1403
41
42. H. API 16A Drift Diameter
7-1/16” 3000 psi
7.032” (179 mm)
Size and Working
Pressure
16-3/4” 3000 & 5000 psi
7-1/16” 5000 psi
7.032” (179 mm)
16-3/4” 10,000 psi
16.720” (425 mm)
18-3/4” 10,000 psi
7.032” (179 mm)
10.970” (279 mm) 20-3/4” 3000 psi
10.970” (279 mm) 21-1/4” 2000 psi
18.720” (475 mm)
13.595” (345 mm) 21-1/4” 5000 psi
13.595” (345 mm) 21-1/4” 10,000 psi
21.220” (539 mm)
13-5/8” 10,000 psi
13-5/8” 15,000 psi
13.595” (345 mm) 26-3/4” 10,000 psi
26.720” (679 mm)
Size and Working Presure
7-1/16” 10,000 & 15,000 psi
11” 3000, 5000 & 10,000 psi
11” 15,000 psi
13-5/8” 3000 & 5000 psi
API Drift
API Drift
16.720” (425 mm)
20.720 (526 mm)
21.220” (539 mm)
21.220” (539 mm)
II. Applicable Operating Characteristics
A. Subasemblies
1. Pipe ram operating characteristics.
a. Seals around drill pipe or casing.
2. Variable bore rams.
a. Seals and holds low or high pressure on drill pipe.
b. Supports 300,000 lb (136, 078 kg) of pipe size at the lower end of the
range, 600,000 lb (272,155 kg) at the higher end of the range.
3. Shear rams
a. Shearing capabilities are dependent upon the size and working pressure
of the BOP and the shearing configuration associated with that BOP.
4. Bonnet
a. Houses the BOP hydraulic operating system.
b. Provides access to the rams.
c. Provides mounting for the wedgelock assembly.
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43. III. Disassembly Procedure
A. Part Preparation Prior To Disassembly
The work area should be clean and well lighted.
B. BOP Disassembly
Reference page 10.
1. Use an air wrench to break and unscrew the bonnet bolts (12) on both sides
of the BOP.
2. Apply hydraulic closing pressure to the rams CLOSE connection on the BOP to
open the bonnet assembly.
3. Screw the lifting eye (38) into the top of the ram.
4. Use a hoist to lift up on the ram to remove it from the operating piston rod.
5. Remove the seal (22) that resides in the seal bore of the BOP body.
6. With a spanner wrench and a hammer, break loose the locking screw housing nuts. (14).
7. Remove the nuts, the locking screw housing (7), and the locking screw (8).
8. Remove the locking screw housing studs (13) with a small pipe wrench.
9. On the top of the bonnet, remove:
a. The tubing gland (36) and blind plug (37).
b. The 1” NPT pipe plug (17).
c. The plastic packing screw (16) and packing (39).
10. Unscrew the plastic packing check valve (15).
11. Remove the O-ring (34) from each bonnet bolt and remove the bolts from
the bonnet asembly.
12. Insert the lifting eye (38) into the intermediate flange or into the bonnet.
13. Attach a hoisting cable to the lifting eye and apply tension to the cable to
hold up the bonnet asembly.
14. Using a crescent wrench, loosen the ram change pistons (9) and (10) on the
flats provided.
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44. 15. Once the ram change pistons are completely loose, move the assembly to the
side away from the main body of the BOP.
C. Bonnet Disassembly
1. Remove the ram guide pins (23) from the intermediate flange (2).
2. Remove the cap screws (35) to disassemble the intermediate flange from the
bonnet.
3. Separate the bonnet (3) from the intermediate flange (2).
4. Remove the ram change cylinder O-rings (31) and (32) from the cylinders, and
remove the cylinders from the bonnet.
5. Remove the operating cylinder O-rings (24) from the operating cylinder, and
remove the cylinder from the bonnet. These O-rings are for standard bonnets
only. The large bore shear bonnets do not have a separate operating cylinder.
6. Remove the operating piston seal ring (26) and the operating piston wear
ring (42) from the operating piston, and remove the piston from the bonnet.
7. Pull out the remaining seals in the bonnet bore, including the wiping O-ring
(28) and the lip seal for the tail rod (27).
8. Remove the following seals from the intermediate flange:
a. spirolox retaining ring (41)
b. lip seal retainer (40)
c. back-up ring (21)
d. lip seal (connecting rod) (20)
e. energizing ring (19)
f. plastic packing ring (18)
g. operating piston rod O-ring (25)
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45. IV. Assembly Procedure
A. Part Preparation Prior to Assembly
The work area should be clean and well lighted.
1. Remove all dirt, grit, oil, and contaminates from the ram bore, ram change
piston holes, bonnet stud holes, all fluid passageways in the body, and intermediate flange. Clean water and detergent should be used for cleaning.
High pressure air may also be used if it is dry air.
2. Clean all internal surfaces of bonnets using clean water and detergent. Lubricate internal sealing surfaces.
3. Clean pistons, cylinders, and intermediate flanges, using clean water and detergent. Lubricate areas that will come in contact with other parts.
4. Lubricate sealing surfaces behind the threads in the bonnet stud holes in the
BOP body after cleaning this area.
5. Sealed elastomer containers should not be opened until they are required for
assembly. This is to prevent contamination and damage to the seal.
B. Bonnet Assembly
Reference page 10.
1. Place each bonnet (3) on stands or pallets with the bore side up.
2. Install the tail rod lip seal (27) and the wiping O-ring (28) into the bonnet (3).
3. Place the operating cylinder O-rings (24) on the operating cylinder (6). These
O-rings are for standard bonnets only. The large bore shear bonnets do not
have a separate operating cylinder.
4. Insert the operating cylinder (6) into the standard bonnet bore.
5. Install the ram change cylinders (11) into the bonnet.
6. Place ram change piston O-rings (33) and the ram change piston to body
O-rings (29) on the both ram change pistons.
7. Insert the assembled ram change pistons (9) and (10) into the bonnet so that
the pistons with side holes are on the OPEN side, and the pistons with center
holes are on the CLOSE side.
Caution: Ensure that the threaded end of the ram change piston does not contact the
floor.
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46. 8. Place the operating piston wear ring (42) and the seal ring (26) onto the operating piston (5).
9. Position the assembled operating piston into the bonnet.
10. Place the intermediate flange (2) on the assembly table with the threaded
holes for the guide pins (23) in the bottom position.
11. Place the operating piston rod O-ring (25) in the central bore.
12. Install the plastic packing ring (18) and energizing ring (19).
13. Install the connecting rod lip seal (20), lip seal retainer (40), the back-up ring
(21), and spirolox retaining ring (41).
14. Install the O-ring (30) onto the intermediate flange.
15. Install the cylinder O-rings (31) and (32) onto the ram change cylinder.
16. Apply a light coat of oil on the O-rings and inside the corresponding seal
bores in the bonnet (3) and the intermediate flange (2).
17. Install the assembled intermediate flange onto the assembled bonnet.
18. Install the cap screws (35) from the bottom side of the intermediate flange
and tighten them securely. Be sure that the plastic packing port on the intermediate flange is on the same side of the assembly as the lifting eye hole on
the bonnet.
Caution: a. Ensure the the tail rod seals are not damaged.
b. Ensure that the seals are not damaged during the bonnet seating process.
Important: The threaded holes for the lifting eyes in both the bonnet and the intermediate flange must be on the same side of the connecting rod.
19. Tighten the cap screws in a crisscross pattern so that the intermediate flange
pulls down straight and level with respect to the face of the bonnet. Torque
the cap screws between 3350 and 3670 ft-lb (4542 and 4976 N•m).
20. Screw the ram guide pins (23) into the intermediate flange. Tighten the
guide pins with a pipe wrench to a maximum of 400 ft-lb (542 N•m).
21. Install the lifting eye (38) into the intermediate flange or into the bonnet.
22. Position the bonnet assembly next to the body and thread the ram change
pistons onto the body.
23. Tighten the rods securely against the body, using a crescent wrench on the
flats provided.
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47. Warning: Make sure that the open and close pistons are in the appropriate location with
respect to the body.
24. Insert the bonnet bolts (12) through the bonnet and intermediate flange.
25. Push the bonnet bolt O-rings (34) over the bonnet bolt threads onto the undercut.
26. Screw the plastic packing check valve (15) all the way into the preparation in
the intermediate flange.
27. Insert one stick of plastic packing (39) above the check valve and install the
plastic packing screw (16). Do not apply any torque to the plastic packing
screw.
28. Install a 1” NPT pipe plug (17) to close the hole.
29. Install the bleeder gland (36) with the plug (37) into the bonnet.
30. Install the double ended locking screw studs (13) into the bonnet. The short
threaded ends screw into the bonnet. These studs can be tightened with a
small pipe wrench used close to the bonnet.
31. Install the locking screw (8) into the locking screw housing (7).
32. Install the locking screw housing over the studs with the flats on the housing
flange vertical. Install and tighten the locking screw housing nuts (14).
Note: All hydraulic lines must be in place. Install the seal carrier before the rams are installed.
33. Lubricate the seal bores for the bonnet seal in both the BOP body (1) and the
intermediate flange (2).
34. Install the bonnet seal (22) that will reside in the seal bore of the intermediate flange.
35. Lubricate the seal with ram lubricant.
36. Close the bonnet asembly with 200 to 500 psi (13.8 to 34.5 Bars) operating
presure, trapping the seal carrier.
Caution: Keep hands out of the way during this operation.
37. Lubricate the seal with ram lubricant.
38. Once the bonnet seals are securely installed, connect the hydraulic lines to
the OPEN and CLOSE ports on the sides of the preventer body.
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48. 39. With the bleed gland (36) loose, on the top of the bonnets, apply 200-300 psi
(13.8 - 20.7 Bars) OPEN and CLOSE operating pressure alternately to expel air
from the operating system.
40. After the air is bled from the system, tighten the bleed plugs (37).
41. Install the appropriate ram assemblies (4) onto the operating piston rod.
42. After assembling both bonnets, apply 1500 psi (103 Bars) hydraulic pressure
to the rams OPEN connection to close the bonnets.
43. Apply thread lubricant to the threads and below the head of the bolt.
44. Screw in and torque the bonnet bolts to according to the charts on page 54
and 55.
V. Operation and Installation Procedures
A. Preparation
Prior to the installation of the preventer, ensure that the following requirements
are met:
1. The capacity and the pressure rating of the accumulators and the pressure
pumps must comply with the API RP53 recommendations or appropriate regulatory agency requirements.
2. Ensure that the ring gaskets are correct for the preventer flange, the hub
size, and the pressure rating.
B. Installation
1. Install the preventer, ensuring that the preventer is right-side-up (outlets are
below the center of the preventer).
2. Inspect the preventer, the ram subassemblies, and all rubber parts during installation.
3. Remove the external mechanical protectors.
4. Lift the BOP with slings installed around the body of the BOP.
5. Install the BOP on a test stump/fixture.
6. Drain the fluid from the operating system.
7. Remove the 1” ball valves or pipe plugs from the inlet and outlet connections.
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49. 8. Connect the hydraulic control lines, and flush the operating system with
clean fluid.
9. Test for leaks in the operating system (refer to Part VII, TESTING.)
10. Install the rams in accordance with the assembly procedure described in Part
IV, ASSEMBLY.
11. While installing the rams, inspect the ram bore and bonnet.
a. Inspect the vertical bore for key seating.
b. Inspect the intersection between the vertical bore and the ram bore.
Grind out any raised metal surfaces. Do not remove any metal below the
original surface.
VI. Maintenance Procedures
A. Routine Maintenance
1. If more than 500 psi (34.5 Bars) hydraulic pressure is required to operate the
ram subassemblies when there is no pressure in the well bore, determine the
cause and correct any irregularities.
Caution: To avoid damage to the packers, close pipe and variable bore rams only when
pipe is in the preventer.
2. Pressure test and operate the preventer once a week per API RP53 “Periodic
Field Testing” or appropriate regulatory agency requirement.
B. Periodic Maintenance
1. Once a year, or every six months in cold weather conditions, completely disassemble the preventer.
Note: For detailed description of disassembly, see Part III, DISASSEMBLY.
a. Clean all parts. Do not use a wire brush on sealing areas.
b. Replace all rubber seals, gaskets, and O-rings.
c. Replace ram packing according to its physical condition.
d. Repair or replace damaged metal parts.
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50. 2. Reassemble the preventer.
Note: For a detailed description of assembly, see Part IV, ASSEMBLY.
a. After reassembling the preventer, test the rams and operating system. Refer to Part VII, TESTING for the correct procedure.
VII. Testing
A. Hydraulic Operating System
1. Test the hydraulic operating system after installation.
a. Flush the hydraulic operating system with clean operating fluid.
b. Test for proper stroking of the rams and operating system.
1) Apply a maximum of 300 psi (20.7 Bars) hydraulic pressure to the OPEN
port.
2) Ensure that the rams open.
3) Reduce hydraulic pressure to zero psi.
4) Apply a maximum of 300 psi (20.7 Bars) hydraulic pressure to the CLOSE
port.
5) Ensure the rams close.
6) Reduce hydraulic pressure to zero psi.
c. Test for leaks in the operating system.
1) Remove the hydraulic line from the OPEN port.
Note: If testing pipe, casing, flex packers, or variable bore rams, be sure that an appropriate size test mandrel is installed into the preventer. DO NOT close the rams on an
open hole unless closing pressure is less than 300 psi (20.7 Bars). Flex Packers and
VBRs should be tested with the largest pipe size for that packer.
2) Apply 300 psi (20.7 Bars) hydraulic pressure to the CLOSE port, and observe the OPEN port for leaks.
3) Increase the pressure to 3000 psi (207 Bars) and observe the OPEN port
for leaks.
4) Inspect for leaks between the intermediate flange, the bonnet, and the
BOP body. Bleed all pressure from the BOP closing line.
5) Replace the hydraulic line to the OPEN port.
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51. 6) Remove the hydraulic line from the CLOSE port.
7) Apply 300 psi (20.7 Bars) hydraulic pressure to the OPEN port, and observe the CLOSE port for leaks.
8) Increase the pressure to 3000 psi (207 Bars) and observe the CLOSE port
for leaks.
9) Inspect for leaks between the intermediate flange, body, and bonnet.
Bleed all pressure from the BOP opening line.
10) Replace the hydraulic line to the CLOSE port.
11) Replace the seals if leaks were observed and repeat the test with new
seals.
12) Repeat the procedure for each preventer.
B. Ram Test
(After installation and as required by API RP53 or appropriate regulatory
agency.)
1. Hydraulically test ram packers with water using the following procedure:
a. Install the BOP stack on a prepared test stump or install a test plug below
the BOP if on the wellhead.
b. Inspect for ram packer leaks at low pressure by closing rams on an appropriate size test mandrel (none if blinds or shears are used) with 1500 psi
(103 Bars) operating pressure, and apply 200 psi (13.8 Bars) pressure under
the rams. Hold pressure for 3 minutes. Maximum pressure drop is 10 psi
(.7 Bars) in 3 minutes.
c. Increase pressure slowly to the rated working pressure of the preventer.
Hold pressure for 3 minutes. Maximum pressure drop is 100 psi (6.9 Bars)
in 3 minutes.
d. If rams leak at low pressure or at working pressure, inspect for worn ram
packers and replace if necessary.
e. Repeat the above procedure for each set of casing, pipe and shear rams.
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52. VIII. Storage
A. Preventer
1. Open the bonnets and remove the ram subassemblies.
2. Remove the top seals and packers, then wash the ram subasemblies.
3. Lubricate the ram bodies, covering them with a heavy grease.
Caution: DO NOT lubricate the top seals or packers.
4. Do not store the ram subassemblies inside the preventer.
Note: Rubber products that have been put into service and that are subsequently stored,
will have an unpredictable shelf-life. This is attributable to their varied physical condition when returned to storage, due to the inability to completely remove
elastomeric solvents (hydrocarbon contaminates, etc.) and storage in a container
filled with air (chemically active gases).
5. Clean the inside and outside machined surfaces of the preventer.
6. Dry with an air blaster until no moisture is left inside or outside the
preventer.
7. Inspect the ram bores and the vertical bores for burrs.
8. Remove burrs by touching the surface lightly with a grinder using 36 to 60
grit paper.
9. Lubricate the ram bore with a heavy grease.
10. Lubricate the end and outlet connection faces with a heavy grease, and cover
them with flange protectors.
11. Flush the operating system using clean operating fluid.
12. Fill the operating system with preservation fluid Cameron P/N 718100.
13. Install the 1” NPT pipe plugs into the OPEN and CLOSE connections.
Caution: DO NOT use the bonnet lifting eyes to lift a preventer.
14. To lift the preventer, use appropriately rated slings around the ends of the
body.
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53. B. Elastomers
1. Store rubber products inside a cool, dark, and dry storage area.
a. The preferred storage temperature range for rubber goods is from 40°F to
80°F (4.4°C to 26.7°C).
b. Rubber goods should be wrapped or otherwise protected from direct exposure to sunlight or artificial light with a high ultraviolet content (such
as fluorescent lighting). Do not store in direct sunlight even if wrapped, as
overheating will result.
c. Store rubber parts in a relaxed position. Do not stretch or hang O-rings
and seals. Labels should not be attached to seals with string, wire, or tape,
as these items may deform the sealing surface.
2. Use airtight containers when possible to protect against circulating air.
3. Ozone is extremely harmful to rubber. Ensure that there is no equipment in
the storage area which may generate ozone, such as mercury vapor lamps,
high-voltage electrical equipment, electric motors, or any electric apparatus
which produces arcing.
4. Keep the rubber products clean and free of solvents, oil, greases, or any
other semi-solid or liquid materials during storage. Rubber goods should specifically be protected against direct contact with: manganese, copper, copper
alloys (including brass), polyvinyl chloride (PVC), creosote-impregnated timber, other rubber goods of different rubber compounds, sulphur, and copper
napthenate.
5. When cleaning is necessary, rubber goods may be cleaned with either soap
and water or methyl alcohol. After cleaning, the rubber goods should be
dried at room temperature.
6. Examine the part before installation.
Important: Rubber goods taken from storage must ALWAYS be inspected before installation. Rubber goods should not be flexed at temperatures below 40°F (4.4°C).
Rubber goods in storage should be inspected every 12 months to ensure that
they are still serviceable.
a. Ensure that the part does not have a tacky surface or noticeable softening
or hardening of the surface.
b. Flex the part and inspect with a magnifying glass to ensure that there are
no cracks.
c. Replace items which show any of the aging signs mentioned above.
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