1. 18-3/4” 15,000 psi Conventional Ram Blowout Preventer
18-3/4” 15,000 psi Conventional Ram Blowout Preventer

2. Blowout Preventer (BOP)
The equipment (or valve) installed at the wellhead to contain wellbore pressure either in the annular space between the casing and the tubulars or in an open hole during drilling, completion, testing,or workover operations.
Ram Blowout Preventer
A valve that uses metal blocks with integral elastomer seals to seal off pressure on a wellbore with or without tubulars in the bore.

3. 18-3/4 - 15,000 Ram BOP
Field replaceable seal seat for long service life and easy field repair
Multiple position locking (MPL) automatically locks rams in a seal-off position
BOP can be equipped with blind shear, variable, pipe or casing rams for ultimate well control flexibility
Cylinder liners field replaceable
Hinged bonnets for ease of ram access
Fluid hinges removable for rapid simple seal replacement
One piece piston rod for strength and durability

4. 18-3/4 15,000 Ram BOP
Bonnet bolts sized and arranged for reliable bonnet seal operation and proper bonnet stress distribution
Side outlets
Available pressure energized bonnet seal conversion
Stainless steel lined ring grooves for corrosion resistance
Piston seals pressure energized lip seal for reliable seal operation

5. Operation Hydraulic Circuit
Application of hydraulic pressure to the operating cylinders pushes the pistons inward or outward to close or open the rams
The multiple position lock is an automatic lock, locking the rams in place after they are closed hydraulically
Operating chambers are rated for 3000 psi continuous operation and have been tested to 4500 psi
Hydraulic closing pressures from 100 psi to 300 psi indicate satisfactory operation

6. Operation Hydraulic Circuit (continued)
Hydraulic pressure applied to closing port initiates fluid flow in drilled passages in the BOP body
Fluid flows from the body through the fluid hinge to the bonnet hinge
Fluid then flows from the bonnet hinge through a drilled passage in the bonnet and exits between the cylinder and cylinder liner

7. Operation Hydraulic Circuit (continued)
Fluid then acts on the backside of the rams closing them
Fluid from the opening sides is pushed out the porting in the bonnet
Fluid flows through a drilled passage in bonnet and into the bonnet hinge
Fluid then passes through the seal sub in the fluid hinge, through the drilled passage in the preventer body and out through the opening chamber port

8. Multiple Position Lock (MPL)
Opening and closing controlled by uni-directional clutch mechanism, lock (overhauling) nut and lock (overhauling) screw
The clutch mechanism maintains nut and ram in locked position
The clutch is disengaged by hydraulic pressure to open the ram

9. Multiple Position Lock (MPL) (continued)
How the MPL Works
Tail rod contains two types of threads
One end - standard LH Acme thread
Other end - fast lead 6-path helical thread
Mating nut fitted to the tail rod
Nut contained by two thrust bearings permitting rotation but preventing linear travel
Linear motion of the tail rod during closing or opening causes nut to rotate
Fast lead, 6-path helical thread rotates the nut three turns per foot of travel

10. Multiple Position Lock (MPL) (continued)
How the MPL Works
Rear clutch plate and front clutch
Contact of rear clutch plate to front clutch plate maintained by spring force
Rotation in the opening direction prevented by interlocking teeth
Sloped angle of teeth permits rotation in closing direction
Hydraulic opening pressure acts on the cylinder liner to release locking mechanism
Cylinder liner moves back against transfer ring
Transfer ring bears on the rear clutch plate disengaging it from the front clutch plate
Opening pressure on the piston moves the ram to the open position as the lock nut and front clutch plate rotate freely

11. Multiple Position Lock (MPL) (continued)
How the MPL Works
The front clutch plate is bolted to the lock (overhauling) nut.
Four rectangular keys in the rear clutch plate engage slots in the retainer plate
Allows linear motion and prevents rotational motion of the rear clutch plate
Springs are captured between rear clutch plate and retainer plate
Opening forces on the piston rod held in check by the lock nut
Opening force creates torque in the lock nut
Torque is transmitted through the engaged teeth of front and rear clutch plates
The rear clutch plate is keyed to the retainer plate
The retainer plate is pinned to the cylinder head thus preventing rotation and locking the assembly

12. Multiple Position Lock (MPL) (continued)
How the MPL Works
Application of hydraulic opening pressure permits rams to open
Hydraulic pressure acting on the cylinder liner moves it back to disengage the clutch
Continued application of opening pressure maintains the clutch unlocked and opens the rams

13. Multiple Position Lock (MPL) (continued)
How the MPL Works
Provision for testing MPL
Two lockout devices
Prevent cylinder liner from disengaging clutch
Opening pressure simulates opening forces applied to the ram
Visual indication of position of lockouts provided

14. Engineering Data

15. Engineering Data (continued)

16. Engineering Data (continued)
+ Using Hydril BOP Thread Lubricant
* using light machine oil

17. Engineering Data (continued)
18-3/4 - 15,000 Hydril Clamp
Pressure-Tension-Bending Capability
Hydril clamp designed in accordance with procedures described in “Summary of Design Equations for Clamp Type Connectors” (1978 Rev.)

18. Engineering Data (continued)
18-3/4 - 15,000 PSI API Flange
Pressure-Tension-Bending
API flange capability calculated by a modified formula given in Appendix H of API Spec. for Wellhead Equipment 6A, Mar

19. Packers and Seals Fixed Bore Pipe Rams
Separate front packer and top seal
Top seal feedable rubber energized during final seal off portion of the ram stroke
Front packer has large volume of feedable rubber bonded to heavy anti-extrusion plates for repeated closures and pressure cycles
Hy-temp front packers and top seals available
Hy-temp seals require the ram block be modified for their use
Hy-temp front packers are secured to the ram block by bolts

20. Packers & Seals (continued)
Ram Change Procedures
1. Open (retract) the rams by applying opening pressure
2. Disengage all bonnet bolts
3. Manually swing both bonnets open and clear of BOP stack. Application of closing pressure to force open bonnet will damage piston rod (If the blowout preventer is not flanged to a wellhead or test stump, unbolt and open only one bonnet at a time to prevent blowout preventer from tipping over.)
4. Extend the rams by applying closing pressure
5. Remove the ram assembly by attaching an eyebolt in the hole provided and lift straight up
6. Replace with new rams and remove lifting eye
7. Retract ram back into bonnet compartment by applying opening pressure
8. Inspect bonnet seal and seal area, lube with a light weight oil
9. Clean and lubricate bonnet bolts with Hydril BOP thread lubricant
10. Manually swing bonnets closed and insert bolts
11. Hand tighten bolts starting with number one bolt, snugging bonnet to body. Then torque all bolts to 8500 ft-lbs*.Torque bolts beginning with the middle bolt on the off-hinge side, then the middle bolt on the hinge side. All other bolts may be torqued in any sequence.
* Other lubricants require different torque values.

21. Packers & Seals (continued)
Fixed Bore Pipe Rams
Front Packer & Top Seal Change-out
Standard Front Packers & Top Seals
1. Insert screwdriver between upper seal and front packer and pry up to remove upper seal from its groove
2. Insert two screwdrivers, one on either side of the front packer and work the packer out
Hy-Temp Front Packers and Top Seal
1. Remove top seal by inserting screw drive between upper seal and front packer
2. Remove two cotter pins from back of ram
3. Remove screws from packer
4. Remove packer

22. Packers & Seals (continued)
Fixed Bore Pipe Rams
Front Packer & Top Seal Change-out
(continued)
Regular Packers & Top Seal
1. Insert packer into ram until seated
2. Fit top seal in groove pins down
Hy-Temp Packers & Top Seal
2. Bolt packer in with two bolts
3. Insert cotter pins
4. Fit top seal in its groove

23. Packers & Seals (continued)
Shear Rams
Designed to shear drill pipe and seal off the wellbore
May be used as blind rams to seal off the open hole
Shear blade design minimizes required shearing load
Dual V arrangement concentrates deforming forces so drill pipe is crimped on the shearing plane
Sharp rake angles impose additional tensile load to aid in pipe separation
After shearing lateral T-seal seals on the horizontal sealing surface of the lower blade carrier

24. Packers & Seals (continued)
Shear Ram Assembly
Lower Blade Shear Ram
1. Remove lower blade top seal
2. Remove the two lower blade cap screws and the lower blade
3. Remove the two anti-extrusion blocks
Upper Blade Shear Ram
1. Remove the two alignment pin set screws
2. Remove the two alignment pins with a common screw driver
3. Remove the three upper blade set screws from the top of the block
4. Remove the four upper blade cap screws retaining the upper blade
5. Remove the upper blade
6. Remove the lateral T-Seal
7. Remove the upper blade top seal
8. Inspect all parts for wear and replace as required

25. Packers & Seals (continued)
Shear Ram Assembly
Lower Blade Shear Ram
1. Prior to assembly, visually inspect all parts, apply a coating of non-petroleum based oil such as castor oil to all seals and seal grooves, and lubricate all threads with Hydril thread lubricant
2. Install the lower blade on the ram block with the lower blade cap screws
3. Install the two anti-extrusion blocks into the grooves of the ram block
4. Install the lower blade top seal in the upper seal groove of the ram block
Upper Blade Shear Ram
2. Install the upper blade top seal into the upper seal groove of the ram block
3. Install the lateral T-seal. Insure that the lower T-section of the seal is properly fitted within its groove
4. Install the upper blade with the four upper blade cap screws hand tight. Insure that the lateral T-seal is properly fitted between the upper blade and the ram block. Torque the cap screws.
5. Install the three upper blade set screws into the top of the ram block. Torque the set screws
6. Install the two alignment pins and hand tighten snug with a common screw driver
7. Install the two alignment pin set screws and tighten snug

26. Packers & Seals (continued)
Hydril Variable Rams (HVR)
Designed to seal on a range of pipe diameters 3-1/2” - 5-1/2” /2” - 7”
Interlocking I-beam inserts molded into the rubber
They confine the rubber within the packer and against the pipe to prevent extrusion of the sealing element
Top seal has large volume of feedable rubber for long and dependable service life
Interchangeable with fixed rams or casing rams

27. Packers & Seals (continued)
Hydril Variable Ram
Disassembly
1. Remove top seal
2. Remove two cotter pins
3. Remove two bolts
4. Remove front packer
Assembly
1. Insert front packer
2. Screw in bolts
3. Insert cotter pins
4. Insert top seal

28. Packers & Seals (continued)
Replaceable Upper Seal Seat
Replaceable Metal Seat
Provides seal surface for the ram top seal
Lock ring energized by 16 specially coated socket head set screws to retain the seat
Contains one seal and backup ring

29. Packers & Seals (continued)
Bonnet Seals
Bonnet hinge seal
Bonnet seal May be converted to low-torque bonnet seal configuration
Piston rod mud seal
Bonnet to piston rod seal

30. Packers & Seals (continued)
Cylinder Seals
Cylinder liner to bonnet seal - O-ring
Cylinder to bonnet seal O-ring
Piston seal - 3-piece bi-directional seal
Cylinder head seal
Cylinder head dirt seal
Lockout stem seal

31. Packers & Seals (continued)
Hinge Pin Seals
Hinge pin seal - O-ring
Hinge pin thread seal - O-ring
Hinge pin bearing seal - O-ring

32. Packers & Seals (continued)
Fluid Hinge Seals
Fluid hinge to bonnet hinge seals O-ring
Fluid hinge to body seals O-rings
Sub to bonnet hinge seals O-rings
Sub to energizer seals O-rings
Energizer to fluid hinge seals - O-rings with backup rings

33. Maintenance Visually inspect the body and ring grooves
Check all bolting
Check ring gaskets
Visually inspect
Bonnet seal areas
Bonnet seal grooves
Ram bores
Seal seats
Piston rods
Ram blocks
Front packers
Top seals
Bonnet seals

34. Maintenance (continued)
Once a year inspect
MPL bearings
BOP seal seat to rails (ram cavity floor)
Minimum ram height
Maximum ram compartment height

35. Testing Hydraulically test with clear water
Inspect all hydraulic connections
Set appropriate size test tool in test stump
Close pipe rams on appropriate size pipe. Check for hydraulic leaks
Increase wellbore pressure to test pressure required
Low pressure
High pressure
Check for leaks
Continue test until rams are tested
Unless you intend to ruin your test mandrel, DO NOT test shear rams with pipe in the hole

36. Testing (continued)
Lockout devices are manually operated and require either a 3/8” square drive or a 5/16” 12-point socket wrench
Close rams, visually check for leaks and reduce closing pressure to 100 psi
Check freedom of movement of lockout devices by alternately turning them clockwise then counter-clockwise about seven turns
Engage lockout devices. Rotate stem seven turns clockwise until snug
Bleed closing pressure to 0 psi
Apply opening pressure to 1500 psi in 500 psi increments, hold for three minutes. Check for leaks Visually observe rams for movement.

37. Testing (continued) MPL Lockout Test Reduce opening pressure to 0 psi
Apply 100 psi closing pressure
Disengage lockout devices by rotating stems counter clockwise about seven turns until snug
Gradually increase opening pressure from 0 until rams open

38. Disassembly MPL Cylinder Disassembly Standard mechanics tools required
Remove rams
Close bonnets and snug up to the two center bolts
Apply opening pressure
Install 1” lifting eye in cylinder head (154) and support with a hoist
Remove ten cylinder head cap screws (156) and remove cylinder head
The cylinder head seal (155), dirt seal (152), and rear lock nut bearing are now accessible

39. Disassembly (continued)
MPL Cylinder Disassembly (continued)
Remove lock nut clutch assembly by rotating the locating pin (158) counterclockwise. Identify it with its respective lock screw (144)
Place clutch assembly on a work bench
Remove eight screws (147) holding the front clutch plate (146) to lock nut (143). As the screws are removed, the rear clutch plate (148) will be pushed toward the front clutch plate (146) by the springs (150).

40. Disassembly (continued)
MPL Cylinder Disassembly (continued)
Remove the front clutch plate (146), the rear clutch plate (148), its keys (151) and key keeper (167) from lock nut (143)
Remove the retainer plate (145) from the lock nut (143)
The front lock nut bearing (149) may be removed from the lock nut

41. Disassembly (continued)
MPL Cylinder Disassembly (continued)
Support the cylinder (137) using a choker sling between the flange and the MPL lockout devices. Remove the twelve cylinder nuts (142) and slide the cylinder back over the piston and cylinder liner
The cylinder seal (133) and backup ring (166) are now exposed
The transfer ring (164) should be removed from inside the cylinder
Remove both lockout glands (160) from the cylinder by rotating counterclockwise
Separate the lockout segments (161) from the lockout stems (159) by rotating the stems clockwise (left handed threads) with the MPL lockout wrench (3/8” square drive)
The lockout stem seals (162) and backup rings (163) are now exposed

42. Disassembly (continued)
Fluid Hinge Disassembly
The fluid hinge and bonnet hinges contain all of the seals concerned with the transfer of hydraulic fluid from the body to the bonnet and the bonnet to the body
Reduce all operating pressures to zero
Remove the two hex head cap screws (36) by counterclockwise rotation
Slip the fluid hinge (24) assembly from between the bonnet hinges. As the fluid hinge assembly comes away from the body watch for the two fluid hinge to body O-rings (35)to prevent losing them
The seal sub assemblies contained in the fluid hinge are spring loaded.
Separate the seal sub (25) and seal sub energizer (27) by pulling them apart 25 29 28 31 30 40 39 36 27 32 24 35 11 23 21 38 37 22 12 10

43. Disassembly (continued)
Bonnet Removal
Insert two eyebolts in the top two holes of the bonnet NOTE: These holes are for lifting the bonnet assembly only and not the entire BOP.
Attach a chain sling to support the bonnet weight, disengage all bonnet bolts, and remove the two hinge pins (61) by rotating from the load hinges. The hinge pin thread and bearing seals (62 and 63) are now exposed.
Remove the four bonnet hinge cap screws (73) from each bonnet hinge. Slide the bonnet out off the location pins (75). The bonnet hinge O-ring (74) is now exposed. 56 55 59 58 57 54 52 53 60
141 61 74 75 63 62

44. Disassembly (continued)25 29 28 31 30 40 39 36 27 32 24 35 11 23 21 38 37 22 12 10
Bonnet Disassembly
The load hinge thrust (38) and radial (37) bearings are removed by unscrewing the four load hinge cap screws.
The hydraulic connections (10) are removed by unscrewing the four cap screws (12). The hydraulic connection O-ring is now exposed.

45. Disassembly (continued)
Upper Seal Seat Removal
Open both bonnets
Remove sixteen socket head set screws (5/16” hex key)
Seat should be free to be lowered from its pocket
Caution! Have the seat blocked from below to prevent injury should the seat drop

46. Assembly (continued) Load Hinge Installation
The upper load hinge (21) is installed with the hinge pin bearing seat up. It is fitted over the two locating pins (22) pressed in the body.
The lower load hinge (2) is installed over two locater pins (22) with the hinge pin bearing seat down.
Install the four load hinge cap screws (23) on each hinge and tighten by clockwise rotation
Install the hinge pin thrust bearing (38)
Install the hinge pin radial bearing (37) 25 29 28 31 30 40 39 36 27 32 24 35 11 23 21 38 37 22 12 10

47. Assembly (continued) Upper Seal Seat Installation
Fit the lower seat to body O-ring (6) and backup ring (7) to the seal seat (4)
Fit the lock ring (5) over the barrel of the seal seat (4) and seat it in its groove
Screw in sixteen set screws (9) until they just touch the lock ring (5)
Fit the seat into the body, blocking it up in place
Engage the sixteen set screws (9) starting with one adjacent to the split in the lock (5), then work around the seat (4) expanding the lock ring into its groove in the body
Lock Ring 5 6 7
Seal Seat 4 9

48. Assembly (continued)
Check machine finishes on bonnet (52) and bonnet hinge (71) or 72) for smooth surfaces
Install O-ring (74) to finish machine side of bonnet hinge (71 or 72) (Lubricate O-ring)
Attach bonnet hinge (71 or 72) to end of bonnet (52) with four bonnet hinge cap screws (73) 52 74 73 72 71

49. Assembly (continued) Bonnet Assembly Installation
Install two lift eyes in bonnet
Install lift sling
Install bonnet onto BOP aligning the bonnet hinge with the load hinges
Install the upper and lower hinge pins
Position the bonnet vertically by hinge pin adjustment
Raise by loosening the lower hinge pin and tightening the upper hinge pin
Lower by loosening the upper hinge pin and tightening the lower hinge pin
Over-tightening may bind thrust washers
Bonnet position is correct when the guide pin on the bonnet enters the hole in the body smoothly
Install bonnet bolts and seals

50. Assembly (continued) Fluid Hinge Installation
Insert the seal sub into the sub-energizer
Insert springs into fluid hinge
Insert Seal sub/subenergizers into fluid hinge
Install fluid hinge to body O-rings
Fit fluid hinge between bonnet hinges
Fit washers over hex head cap screws and insert cap screws into fluid hinge
Torque cap screws to 250 ft-lbs

51. Assembly (continued) MPL Cylinder Assembly
Inspect all machine surfaces to ensure all parts are clean and free from burrs
Install the piston seal (136) and piston wear rings (165) on the piston (135) as shown. The piston seal is composed of three separate parts. They may be immersed in hot water to increase their flexibility. The wear rings are split for ease of assembly and should be installed after the piston seal is in place.
Piston Seal 136
Piston Wear Ring
165
Piston 135

52. Assembly (continued) MPL Cylinder Assembly (continued)
Place cylinder liner O-ring (140) and two backup rings (153) on the cylinder liner (139)
Install cylinder liner (139) over piston (135) with the piston standing vertically on the T-slot end. Slide the cylinder liner partway onto the piston such that the piston is approximately 3” from the rear end of the cylinder liner.
Install piston and cylinder liner assembly into bonnet

53. Assembly (continued)
Install O-rings (162) and back-up rings (163) on lockout stems (159)
Install lockout segments (161), stems (159) and gland nuts (160) into cylinder (137). Retract segments fully by turning lockout stems approximately 7 turns counter-clockwise
Place cylinder to bonnet O-ring (138) and backup ring (166) on cylinder
Install cylinder into recess of bonnet. Install nuts (142) and torque to specification 1280 ft-lbs

54. Assembly (continued) MPL Assembly (continued)
Place the rear clutch plate (148) on a piece of cardboard or wood on a smooth table, clutch teeth down.
Slip the key retainer (167) through the hole in each of the four clutch keys (151)
Gently expand the key retainer and slip over the rear clutch plate outside diameter. Position each key in its recess on the clutch plate and allow the key retainer to contract into its groove on the outside diameter of the rear clutch plate
Insert the clutch springs (150) in the rear clutch plate
Position the retainer plate (145), locating pin (158) upward, over the clutch plate/springs/clutch keys/key retainer sub-assembly. Lower the retainer plate onto the sub-assembly insuring that each of the clutch keys engage their respective slots in the retainer plate
Place the lock nut (143), large outside diameter end down, on a piece of card board or wood on a smooth table

55. Assembly (continued) MPL Assembly (continued)
Place one lock nut bearing (149) on the lock nut
Hold together the retainer plate, and rear clutch plate sub-assembly and turn them over as a unit such that the rear clutch plate’s teeth face upward. Slide this assembly onto the lock nut and bearing. Position the assembly such that the locating pin on the retainer plate is over the edge of the table. This will allow the retainer plate to rest squarely on the lock nut bearing.
Place the front clutch plate (146), teeth downward, on the lock nut assembly
Thread two of the cap screws (147), 180° apart, through the front clutch plate and into the lock nut
Alternate turning the two cap screws until the front clutch plate is snug against the lock nut.
Install the remaining cap screws (147) and tighten to full torque value. The assembly will have to be held with a strap wrench to do this.

56. Assembly (continued) MPL Assembly (continued)
Install lock nut/clutch assembly onto lock screw such that timing marks match. Timing mark is indicated by a “T” stamped on the end of the lock screw and on the end of the lock nut
Rotate the lock nut/clutch assembly clockwise until it shoulders in the cylinder. Mark the top (12 o-clock position). Rotate the lock nut/clutch assembly counterclockwise until it is located on the end of the lock screw. Disengage the clutch mechanism by depressing the rear clutch plate with two “C” clamps placed at points shown by the arrows. Align the marks on the lock nut and the locating pin on the retainer plate by rotating the retainer plate/rear clutch plate sub-assembly. Release the “C” clamps and rotate the lock nut/clutch assembly clockwise until it shoulders in the cylinder. The locating pin hole in cylinder head will now align with the locating pin in the retainer plate

57. Assembly (continued)
Place the cylinder head O-ring (155) and the dirt seal (152) on the cylinder head (154)
Install rear lock nut bearing (149) into the cylinder head
Install cylinder head. Install cylinder head cap screws (156) and torque to specifications
Apply closing hydraulic pressure to extend piston rods

58. Assembly (continued) Extend the rams by applying closing pressure
Remove the ram assembly by attaching an eyebolt in the hole provided and lift straight up
Replace with new rams and remove lifting eye
Retract ram back in to bonnet compartment by applying opening pressure
Inspect bonnet seal and seal area, lube with a light weight oil
Clean and lubricate bonnet bolts with Hydril BOP thread lubricant
Manually swing bonnets closed and insert bolts
Hand tighten bolts starting with number one bolt, snugging bonnet to body. Then torque all bolts to 8500 ft-lbs.* Bolts denoted “N” may be torqued in any sequence
*Other lubricants require different torque values

59. Parts