conventional ram bop training
DESCRIPTION
Conventional Ram BOP TrainingTRANSCRIPT
®
18-3/4” 15,000 psi18-3/4” 15,000 psiConventional RamConventional RamBlowout PreventerBlowout Preventer
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Blowout Preventer (BOP)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 PreventerRam 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.
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18-3/4 - 15,000 Ram BOP18-3/4 - 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 equippedwith blind shear,variable, pipe or casingrams for ultimate wellcontrol 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
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18-3/4 15,000 Ram BOP18-3/4 15,000 Ram BOP Bonnet bolts sized and arranged for reliable bonnet
seal operation and proper bonnet stress distribution
Side outlets
Availablepressureenergized bonnetseal conversion
Stainless steel linedring grooves forcorrosion resistance
Piston seals pressure energizedlip seal for reliable seal operation
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OperationOperationHydraulic CircuitHydraulic 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 automaticlock, locking the rams in place after theyare closed hydraulically
Operating chambers are ratedfor 3000 psi continuousoperation and have beentested to 4500 psi
Hydraulic closing pressuresfrom 100 psi to 300 psi indicate satisfactory operation
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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
OperationOperationHydraulic Circuit Hydraulic Circuit (continued)(continued)
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Fluid then acts on the backside of the rams closing them
Fluid from the opening sides is pushedout the porting in the bonnet
Fluid flows through a drilledpassage in bonnet and intothe bonnet hinge
Fluid then passes throughthe seal sub in the fluidhinge, through the drilled passage in the preventer body and out through the opening chamber port
OperationOperationHydraulic Circuit Hydraulic Circuit (continued)(continued)
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Multiple Position Lock (MPL)Multiple Position Lock (MPL)
Opening and closing controlled byuni-directional clutch mechanism,lock (overhauling) nut andlock (overhauling) screw
The clutch mechanismmaintains nut and ram inlocked position
The clutch is disengagedby hydraulic pressureto open the ram
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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 bearingspermitting rotation but preventing linear travel
Linear motion of the tail rod during closingor opening causes nut to rotate
Fast lead, 6-path helical thread rotates thenut three turns per foot of travel
Multiple Position Lock (MPL)Multiple Position Lock (MPL)(continued)(continued)
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How the MPL Works
Rear clutch plate and front clutch
Contact of rear clutch plate to front clutch platemaintained by spring force
Rotation in the opening direction prevented byinterlocking teeth
Sloped angle of teeth permits rotation in closing direction
Hydraulic opening pressure acts on the cylinderliner to release locking mechanism
Cylinder liner moves back against transfer ring
Transfer ring bears on the rear clutch platedisengaging it from the front clutch plate
Opening pressure on the piston moves the ramto the open position as the lock nut and front clutch plate rotate freely
Multiple Position Lock (MPL)Multiple Position Lock (MPL)(continued)(continued)
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How the MPL Works The front clutch plate is bolted to the lock
(overhauling) nut.
Four rectangular keys in the rear clutch plateengage slots in the retainer plate
Allows linear motion and prevents rotational motionof the rear clutch plate
Springs are captured between rear clutch plate and retainer plate
Opening forces on the piston rod held in check by thelock 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
Multiple Position Lock (MPL)Multiple Position Lock (MPL)(continued)(continued)
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How the MPL Works
Application of hydraulicopening pressure permitsrams to open
Hydraulic pressure acting onthe cylinder liner moves it backto disengage the clutch
Continued application ofopening pressure maintainsthe clutch unlocked and opensthe rams
Multiple Position Lock (MPL)Multiple Position Lock (MPL)(continued)(continued)
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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
Multiple Position Lock (MPL)Multiple Position Lock (MPL)(continued)(continued)
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Engineering DataEngineering Data
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Engineering Data Engineering Data (continued)(continued)
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Engineering Data Engineering Data (continued)(continued)
+ Using Hydril BOP Thread Lubricant* using light machine oil
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18-3/4 - 15,000 Hydril ClampPressure-Tension-Bending Capability
Hydril clamp designed in accordance with procedures described in “Summary of Design Equations for Clamp Type Connectors” (1978 Rev.)
Engineering Data Engineering Data (continued)(continued)
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18-3/4 - 15,000 PSI API FlangePressure-Tension-Bending
API flange capability calculated by a modified formula given in Appendix H of API Spec. for Wellhead Equipment 6A, Mar. 1983.
Engineering Data Engineering Data (continued)(continued)
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Packers and SealsPackers and SealsFixed Bore Pipe RamsFixed Bore Pipe Rams
Separate front packer and top seal
Top seal feedable rubber energized duringfinal 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
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Packers & Seals Packers & Seals (continued)(continued)
Ram Change Procedures1. Open (retract) the rams by applying opening pressure2. Disengage all bonnet bolts3. 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 pressure5. Remove the ram assembly by attaching an eyebolt in the hole provided and lift straight up6. Replace with new rams and remove lifting eye7. Retract ram back into bonnet compartment by applying opening pressure8. Inspect bonnet seal and seal area, lube with a light weight oil9. Clean and lubricate bonnet bolts with Hydril BOP thread lubricant10. Manually swing bonnets closed and insert bolts11. 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.
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Fixed Bore Pipe RamsFront Packer & Top Seal Change-out
Standard Front Packers & Top Seals
1. Insert screwdriver between upper seal and frontpacker and pry up to remove upper seal fromits groove
2. Insert two screwdrivers, one on either side of thefront packer and work the packer out
Hy-Temp Front Packers and Top Seal
1. Remove top seal by inserting screw drive betweenupper seal and front packer
2. Remove two cotter pins from back of ram
3. Remove screws from packer
4. Remove packer
Packers & Seals Packers & Seals (continued)(continued)
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Packers & Seals Packers & Seals (continued)(continued)
Fixed Bore Pipe RamsFront 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
1. Insert packer into ram until seated
2. Bolt packer in with two bolts
3. Insert cotter pins
4. Fit top seal in its groove
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Shear Rams
Designed to shear drill pipe and seal off the wellbore
May be used as blind ramsto seal off the open hole
Shear blade design minimizesrequired shearing load
Dual V arrangementconcentrates deformingforces so drill pipe is crimpedon the shearing plane
Sharp rake angles imposeadditional tensile load to aid in pipe separation
After shearing lateral T-seal seals on the horizontal sealing surface of the lower blade carrier
Packers & Seals Packers & Seals (continued)(continued)
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Shear Ram AssemblyLower 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 setscrews
2. Remove the two alignment pinswith a common screw driver
3. Remove the three upper blade setscrews from the top of the block
4. Remove the four upper blade capscrews 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
Packers & Seals Packers & Seals (continued)(continued)
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Packers & Seals Packers & Seals (continued)(continued)
Shear Ram AssemblyLower Blade Shear Ram1. 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 lubricant2. Install the lower blade on the ram block with the lower
blade cap screws3. Install the two anti-extrusion blocks into the grooves
of the ram block4. Install the lower blade top seal in the upper seal
groove of the ram blockUpper Blade Shear Ram1. Prior to assembly, visually inspect all parts, apply a
coating of non-petroleum based oil such as castoroil to all seals and seal grooves, and lubricate allthreads with Hydril thread lubricant
2. Install the upper blade top seal into the upper sealgroove of the ram block
3. Install the lateral T-seal. Insure that the lower T-sectionof the seal is properly fitted within its groove
4. Install the upper blade with the four upper blade capscrews hand tight. Insure that the lateral T-seal isproperly 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 screws6. Install the two alignment pins and hand tighten snug with a common screw driver7. Install the two alignment pin set screws and tighten snug
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Packers & Seals Packers & Seals (continued)(continued)
Hydril Variable Rams (HVR)
Designed to seal on a range of pipediameters3-1/2” - 5-1/2”- 31168334-1/2” - 7” - 3118844
Interlocking I-beam inserts molded intothe rubber
They confine the rubber within the packerand against the pipe to preventextrusion of the sealing element
Top seal has large volume of feedablerubber for long and dependable service life
Interchangeable with fixed rams or casing rams
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Hydril Variable RamDisassembly
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
Packers & Seals Packers & Seals (continued)(continued)
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Replaceable Upper Seal Seat
Replaceable Metal Seat
Provides seal surfacefor the ram top seal
Lock ring energized by16 specially coatedsocket head set screwsto retain the seat
Contains one seal and backup ring
Packers & Seals Packers & Seals (continued)(continued)
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Bonnet Seals
Bonnet hinge seal
Bonnet sealMay be converted tolow-torque bonnetseal configuration
Piston rod mud seal
Bonnet to pistonrod seal
Packers & Seals Packers & Seals (continued)(continued)
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Cylinder Seals Cylinder liner to bonnet seal - O-ring
Cylinder to bonnet seal O-ring
Piston seal - 3-piece bi-directional seal
Packers & Seals Packers & Seals (continued)(continued)
Cylinder head seal
Cylinder head dirt seal
Lockout stem seal
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Hinge Pin Seals
Hinge pin seal -O-ring
Hinge pin threadseal - O-ring
Hinge pin bearing seal -O-ring
Packers & Seals Packers & Seals (continued)(continued)
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Fluid Hinge Seals
Fluid hinge to bonnethinge seals O-ring
Fluid hinge tobody sealsO-rings
Sub to bonnet hingeseals O-rings
Sub to energizerseals O-rings
Energizer to fluidhinge seals -O-rings withbackup rings
Packers & Seals Packers & Seals (continued)(continued)
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MaintenanceMaintenance 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
Visually inspect Ram blocks Front packers Top seals Bonnet seals
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Maintenance Maintenance (continued)(continued)
Once a year inspect MPL bearings BOP seal seat to
rails (ram cavity floor) Minimum ram height Maximum ram
compartment height
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TestingTesting 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 ramswith pipe in the hole
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Testing Testing (continued)(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.
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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
Testing Testing (continued)(continued)
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DisassemblyDisassemblyMPL Cylinder Disassembly
Standard mechanics toolsrequired
Remove rams
Close bonnets and snugup to the two center bolts
Apply opening pressure
Install 1” lifting eye incylinder head (154) andsupport with a hoist
Remove ten cylinderhead cap screws (156)and remove cylinder head
The cylinder head seal (155), dirt seal (152), and rear lock nut bearing are now accessible
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MPL Cylinder Disassembly (continued) Remove lock nut clutch
assembly by rotating thelocating pin (158)counterclockwise.Identify it with itsrespective lockscrew (144)
Place clutch assemblyon a work bench
Remove eight screws(147) holding the frontclutch 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).
Disassembly Disassembly (continued)(continued)
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MPL Cylinder Disassembly (continued)
Remove the frontclutch plate (146), therear clutch plate (148),its keys (151) and keykeeper (167) from locknut (143)
Remove the retainerplate (145) from thelock nut (143)
The front lock nutbearing (149) may beremoved from thelock nut
Disassembly Disassembly (continued)(continued)
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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) andbackup ring (166) are now exposed
The transfer ring (164) shouldbe removed from inside the cylinder
Remove both lockout glands(160) from the cylinder byrotating counterclockwise
Separate the lockout segments(161) from the lockout stems (159)by rotating the stems clockwise (left handed threads) with the MPLlockout wrench (3/8” square drive)
The lockout stem seals (162) and backup rings (163) are now exposed
Disassembly Disassembly (continued)(continued)
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Disassembly Disassembly (continued)(continued)
Fluid Hinge Disassembly
The fluid hinge and bonnet hingescontain all of the seals concernedwith the transfer of hydraulic fluidfrom the body to the bonnet andthe bonnet to the body
Reduce all operating pressuresto zero
Remove the two hex head capscrews (36) by counterclockwiserotation
Slip the fluid hinge (24) assemblyfrom between the bonnet hinges.As the fluid hinge assemblycomes away from the body watchfor the two fluid hinge to bodyO-rings (35)to preventlosing 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
2321
38
3722
1210
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Bonnet Removal
Insert two eyebolts in the toptwo holes of the bonnetNOTE: These holes are forlifting the bonnet assemblyonly and not the entire BOP.
Attach a chain sling tosupport the bonnet weight,disengage all bonnet bolts,and remove the two hingepins (61) by rotating fromthe load hinges. The hingepin thread and bearingseals (62 and 63) are nowexposed.
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.
Disassembly Disassembly (continued)(continued)
5655595857
5452
53
60 141
61
74
75
63
62
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Bonnet Disassembly
The load hinge thrust (38) andradial (37) bearings are removed byunscrewing the four load hingecap screws.
The hydraulic connections (10) areremoved by unscrewing the fourcap screws (12). The hydraulicconnection O-ring is now exposed.
Disassembly Disassembly (continued)(continued)
25
29
28
31
30
40
39
36
27
32
24
35
11
2321
38
3722
1210
45
Upper Seal Seat Removal
Open both bonnets
Remove sixteen socket head set screws(5/16” hex key)
Seat should be free to be lowered fromits pocket
Caution! Have the seat blocked from belowto prevent injury should the seat drop
Disassembly Disassembly (continued)(continued)
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Load Hinge Installation
The upper load hinge (21) is installedwith the hinge pin bearing seat up.It is fitted over the two locatingpins (22) pressed in the body.
The lower load hinge (2) is installedover two locater pins (22) with thehinge pin bearing seat down.
Install the four load hinge capscrews (23) on each hinge andtighten by clockwise rotation
Install the hinge pin thrustbearing (38)
Install the hinge pin radialbearing (37)
Assembly Assembly (continued)(continued)
25
29
28
31
30
40
39
36
27
32
24
35
11
2321
38
3722
1210
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Upper Seal Seat Installation
Fit the lower seat to body O-ring (6) andbackup ring (7) to the seal seat (4)
Fit the lock ring (5) over the barrel of the sealseat (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 inplace
Engage the sixteen set screws (9) startingwith one adjacent to the split in the lock (5),then work around the seat (4) expandingthe lock ring into its groove in the body
Assembly Assembly (continued)(continued)
Lock Ring 5
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Seal Seat 4
9
48
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)
Assembly Assembly (continued)(continued)
52
74
73
7271
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Bonnet Assembly Installation
Install two lift eyes in bonnet
Install lift sling
Install bonnet onto BOP aligning thebonnet hinge with the load hinges
Install the upper and lower hinge pins
Position the bonnet vertically by hingepin adjustment
Raise by loosening the lower hinge pinand tightening the upper hinge pin
Lower by loosening the upper hinge pinand 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
Assembly Assembly (continued)(continued)
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Assembly Assembly (continued)(continued)
Fluid Hinge Installation
Insert the seal sub into thesub-energizer
Insert springs into fluid hinge
Insert Seal sub/subenergizersinto fluid hinge
Install fluid hinge to bodyO-rings
Fit fluid hinge between bonnethinges
Fit washers over hex head cap screws and insert cap screws into fluid hinge
Torque cap screws to 250 ft-lbs
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Assembly Assembly (continued)(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 Ring165
Piston Wear Ring
Piston 135
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MPL Cylinder Assembly (continued)
Place cylinder liner O-ring(140) and two backup rings(153) on the cylinder liner (139)
Install cylinder liner (139) overpiston (135) with the pistonstanding vertically on theT-slot end. Slide the cylinderliner partway onto the pistonsuch that the piston isapproximately 3” from therear end of the cylinder liner.
Install piston and cylinder liner assembly into bonnet
Assembly Assembly (continued)(continued)
53
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
Assembly Assembly (continued)(continued)
54
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 andslip over the rear clutch plateoutside diameter. Position eachkey in its recess on the clutch plateand allow the key retainer to contract into its groove on the outsidediameter of the rear clutch plate
Insert the clutch springs (150) inthe rear clutch plate
Position the retainer plate (145),locating pin (158) upward, over theclutch 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
Assembly Assembly (continued)(continued)
55
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 locatingpin on the retainer plate is over theedge of the table. This will allowthe retainer plate to rest squarelyon the lock nut bearing.
Place the front clutch plate (146),teeth downward, on the lock nutassembly
Thread two of the cap screws (147),180° apart, through the front clutchplate and into the lock nut
Alternate turning the two cap screwsuntil 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.
Assembly Assembly (continued)(continued)
56
MPL Assembly (continued)
Install lock nut/clutch assembly onto lock screw such that timing marks match. Timing mark isindicated by a “T” stamped on the end of the lockscrew and on the end of the lock nut
Rotate the lock nut/clutch assembly clockwise until itshoulders in the cylinder. Mark the top (12 o-clockposition). Rotate the lock nut/clutch assemblycounterclockwise until it is located on the end of thelock screw. Disengage the clutch mechanism bydepressing the rear clutch plate with two “C” clampsplaced at points shown by the arrows. Align themarks on the lock nut and the locating pin onthe retainer plate by rotating the retainer plate/rearclutch plate sub-assembly. Release the “C” clampsand rotate the lock nut/clutch assembly clockwiseuntil it shoulders in the cylinder. The locating pinhole in cylinder head will now align with the locating pin in the retainer plate
Assembly Assembly (continued)(continued)
57
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
Assembly Assembly (continued)(continued)
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Assembly (continued)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
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PartsParts