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

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Presentation on theme: "® 18-3/4” 15,000 psi Conventional Ram Blowout Preventer."— Presentation transcript:

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

2 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 3 18-3/4 - 15,000 Ram BOP lField replaceable seal seat for long service life and easy field repair lMultiple position locking (MPL) automatically locks rams in a seal-off position lBOP can be equipped with blind shear, variable, pipe or casing rams for ultimate well control flexibility lCylinder liners field replaceable lHinged bonnets for ease of ram access lFluid hinges removable for rapid simple seal replacement lOne piece piston rod for strength and durability

4 4 18-3/4 15,000 Ram BOP lBonnet bolts sized and arranged for reliable bonnet seal operation and proper bonnet stress distribution lSide outlets lAvailable pressure energized bonnet seal conversion lStainless steel lined ring grooves for corrosion resistance lPiston seals pressure energized lip seal for reliable seal operation

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

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

7 7 lFluid then acts on the backside of the rams closing them lFluid from the opening sides is pushed out the porting in the bonnet lFluid flows through a drilled passage in bonnet and into the bonnet hinge lFluid 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 Operation Hydraulic Circuit (continued)

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

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

10 10 How the MPL Works lRear clutch plate and front clutch lContact of rear clutch plate to front clutch plate maintained by spring force lRotation in the opening direction prevented by interlocking teeth lSloped angle of teeth permits rotation in closing direction lHydraulic opening pressure acts on the cylinder liner to release locking mechanism lCylinder liner moves back against transfer ring lTransfer ring bears on the rear clutch plate disengaging it from the front clutch plate lOpening pressure on the piston moves the ram to the open position as the lock nut and front clutch plate rotate freely Multiple Position Lock (MPL) (continued)

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

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

13 13 How the MPL Works lProvision for testing MPL lTwo lockout devices lPrevent cylinder liner from disengaging clutch lOpening pressure simulates opening forces applied to the ram lVisual indication of position of lockouts provided Multiple Position Lock (MPL) (continued)

14 14 Engineering Data

15 15 Engineering Data (continued)

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

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

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

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

20 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 21 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 Packers & Seals (continued)

22 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 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

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

24 24 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 Packers & Seals (continued)

25 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 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 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 26 Packers & Seals (continued) Hydril Variable Rams (HVR) lDesigned to seal on a range of pipe diameters 3-1/2” - 5-1/2” /2” - 7” lInterlocking I-beam inserts molded into the rubber lThey confine the rubber within the packer and against the pipe to prevent extrusion of the sealing element lTop seal has large volume of feedable rubber for long and dependable service life lInterchangeable with fixed rams or casing rams

27 27 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 Packers & Seals (continued)

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

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

30 30 Cylinder Seals lCylinder liner to bonnet seal - O-ring lCylinder to bonnet seal O-ring lPiston seal - 3-piece bi-directional seal Packers & Seals (continued) lCylinder head seal lCylinder head dirt seal lLockout stem seal

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

32 32 Fluid Hinge Seals lFluid hinge to bonnet hinge seals O-ring lFluid hinge to body seals O-rings lSub to bonnet hinge seals O-rings lSub to energizer seals O-rings lEnergizer to fluid hinge seals - O-rings with backup rings Packers & Seals (continued)

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

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

35 35 Testing lHydraulically test with clear water lInspect all hydraulic connections lSet appropriate size test tool in test stump lClose pipe rams on appropriate size pipe. Check for hydraulic leaks lIncrease wellbore pressure to test pressure required l Low pressure l High pressure lCheck for leaks lContinue test until rams are tested lUnless you intend to ruin your test mandrel, DO NOT test shear rams with pipe in the hole

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

37 37 MPL Lockout Test lReduce opening pressure to 0 psi lApply 100 psi closing pressure lDisengage lockout devices by rotating stems counter clockwise about seven turns until snug lGradually increase opening pressure from 0 until rams open Testing (continued)

38 38 Disassembly MPL Cylinder Disassembly lStandard mechanics tools required lRemove rams lClose bonnets and snug up to the two center bolts lApply opening pressure lInstall 1” lifting eye in cylinder head (154) and support with a hoist lRemove ten cylinder head cap screws (156) and remove cylinder head lThe cylinder head seal (155), dirt seal (152), and rear lock nut bearing are now accessible

39 39 MPL Cylinder Disassembly (continued) lRemove lock nut clutch assembly by rotating the locating pin (158) counterclockwise. Identify it with its respective lock screw (144) lPlace clutch assembly on a work bench lRemove 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). Disassembly (continued)

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

41 41 MPL Cylinder Disassembly (continued) lSupport 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 lThe cylinder seal (133) and backup ring (166) are now exposed lThe transfer ring (164) should be removed from inside the cylinder lRemove both lockout glands (160) from the cylinder by rotating counterclockwise lSeparate 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) lThe lockout stem seals (162) and backup rings (163) are now exposed Disassembly (continued)

42 42 Disassembly (continued) Fluid Hinge Disassembly lThe 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 lReduce all operating pressures to zero lRemove the two hex head cap screws (36) by counterclockwise rotation lSlip 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 lThe seal sub assemblies contained in the fluid hinge are spring loaded. lSeparate the seal sub (25) and seal sub energizer (27) by pulling them apart

43 43 Bonnet Removal lInsert 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. lAttach 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. lRemove 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 (continued)

44 44 Bonnet Disassembly lThe load hinge thrust (38) and radial (37) bearings are removed by unscrewing the four load hinge cap screws. lThe hydraulic connections (10) are removed by unscrewing the four cap screws (12). The hydraulic connection O-ring is now exposed. Disassembly (continued)

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

46 46 Load Hinge Installation lThe 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. lThe lower load hinge (2) is installed over two locater pins (22) with the hinge pin bearing seat down. lInstall the four load hinge cap screws (23) on each hinge and tighten by clockwise rotation lInstall the hinge pin thrust bearing (38) lInstall the hinge pin radial bearing (37) Assembly (continued)

47 47 Upper Seal Seat Installation lFit the lower seat to body O-ring (6) and backup ring (7) to the seal seat (4) lFit the lock ring (5) over the barrel of the seal seat (4) and seat it in its groove lScrew in sixteen set screws (9) until they just touch the lock ring (5) lFit the seat into the body, blocking it up in place lEngage 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 Assembly (continued) Lock Ring Seal Seat 4 9

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

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

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

51 51 Assembly (continued) MPL Cylinder Assembly lInspect all machine surfaces to ensure all parts are clean and free from burrs lInstall 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 Wear Ring Piston 135

52 52 MPL Cylinder Assembly (continued) lPlace cylinder liner O-ring (140) and two backup rings (153) on the cylinder liner (139) lInstall 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. lInstall piston and cylinder liner assembly into bonnet Assembly (continued)

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

54 54 MPL Assembly (continued ) lPlace the rear clutch plate (148) on a piece of cardboard or wood on a smooth table, clutch teeth down. lSlip the key retainer (167) through the hole in each of the four clutch keys (151) lGently 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 lInsert the clutch springs (150) in the rear clutch plate lPosition 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 lPlace the lock nut (143), large outside diameter end down, on a piece of card board or wood on a smooth table Assembly (continued)

55 55 MPL Assembly (continued ) lPlace one lock nut bearing (149) on the lock nut lHold 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. lPlace the front clutch plate (146), teeth downward, on the lock nut assembly lThread two of the cap screws (147), 180° apart, through the front clutch plate and into the lock nut lAlternate turning the two cap screws until the front clutch plate is snug against the lock nut. lInstall 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 (continued)

56 56 MPL Assembly (continued) lInstall 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 lRotate 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 Assembly (continued)

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

58 58 Assembly (continued) lExtend the rams by applying closing pressure lRemove the ram assembly by attaching an eyebolt in the hole provided and lift straight up lReplace with new rams and remove lifting eye lRetract ram back in to bonnet compartment by applying opening pressure lInspect bonnet seal and seal area, lube with a light weight oil lClean and lubricate bonnet bolts with Hydril BOP thread lubricant lManually swing bonnets closed and insert bolts lHand 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 59 Parts

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