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CAMERON France S.A.S

FRONT SHEET

1Project name

REVISE AND RESUBMIT

Seadrill

2

3

TO BE ISSUED AS FINALPROVIDED COMMENTS AREINCORPORATED

PO No : JU 312046 

BOP Equipment18-3/4" 10K DL BOP Operating &Maintenance Manual

Doc. NumberB011

Rev01

 File Name :SD-B311-BOP-B012-02-01

NO COMMENT, FINAL ISSUE

SIGN.Rig : B312 

DATE :

Deep Dril lerMOBILE OFFSHORE DRILLING UNIT

246 ft x 218 ft x 258 ft

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Cameron DL Blowout Preventer

18-3/4" 10000 psi WP (High Temp) Operation and

Operation and Maintenance Manual 

SD-010274-10-02

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 All the information contained in this manual is the exclusive property ofCameron. Any reproduction or use of the calculations, drawings,photographs, procedures or instructions, either expressed or implied, isforbidden without the written permission of Cameron or its authorized agent.

Initial Release 01December 2005

Copyright © 2005 all right reservedCooper Cameron Corporation, Cameron France

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PREFACE

The procedures included in this book are to be performed in conjunction with the requirementsand recommendations outlined in API Specifications. Any repairs to the equipment covered bythis book should be done by an authorized Cameron service representative. Cameron will notbe responsible for loss or expense resulting from any failure of equipment or any damage to anyproperty or injury or death to any person resulting in whole or in part from repairs performed byother that authorized Cameron personnel. Such unauthorized repairs shall also serve toterminate any contractual or other warranty, if any, on the equipment and may also result in theequipment no longer meeting applicable requirements.

File copies of these manuals are being maintained. Revisions and/or additions will be made

when deemed necessary by Cameron. Refer to component part numbers in all communicationconcerning this equipment.

This book covers Cameron products, which are products of Cooper Cameron Corporation.

Cooper Cameron CorporationCameron France, SAS

Plaine St Pierre – CS 62034535 Béziers Cedex

Fax : 04-67-11-16-00http://www.coopercameron .com 

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TABLE OF CONTENTS

DL BOP 18-3/4” 10.000 PSI WP Operation and maintenance

Reference Document: Detailed drawing W/ BOM - SD-010274-04-02

I  PHYSICAL DATA ...............................................................................................................5 

II   APPLICABLE OPERATING CHARACTERISTICS AND PRINCIPLES OF OPERATION 8 

III  DISASSEMBLY PROCEDURE..........................................................................................9 

IV   ASSEMBLY PROCEDURE ..............................................................................................13 

V  OPERATION PROCEDURES ..........................................................................................20 

VI 

MAINTENANCE PROCEDURES ..................................................................................... 21 

VII  TESTING...........................................................................................................................35  

VIII  STORAGE ........................................................................................................................37 

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18-3/4" 10 M DL ANNULAR BOP Operation and maintenance

I PHYSICAL DATA

 A) Lubricants:

1) Thread lubricant - API-5A-Lub, Fel-Pro Paste #670, or SLECT-A-TORQPaste #503 (4 lb can P/N 705444).

2) Multi-purpose lubricant or grease.

3) Multi-purpose lubricant or grease for cold weather operation.

4) Hydraulic operating system:(a) Storage –TOTAL Equivis ZS32 or equivalent(b) Standard operation – Use TOTAL Equivis ZS32 or Citgo Aquamarine#32

or equivalent

B) Dimensional Drawing with bill of material

See Doc SD-010274-04-02

C) Weights and li fting capacity

1) Total weight: 18570 kg.

2) Lifting Lug capacity for each lug: 35 tons

3) Maximum capacity of all four lugs used together: 140 tons

D) Lifting and Handling

1) Lift BOP assemblies only with slings appropriately rated for the maximumweight of the BOP.

2) Handle all other sub-assemblies using appropriately rated slings.

E) External Thread Connections

NPT Fitting Size for Open and Close Ports: 1.1/4” NPT

F) Hydraulic Operating System Requirements

Open volume 170 Liters 45.1 Gallons

Close volume 193 Liters 51 Gallons

1) Normal pressure for the hydraulic operating system is 1500 psi.

2) Maximum pressure for the hydraulic operating system is 3000 psi.

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G) Torque Specifications

1) Inner Cylinder Nuts (Item 31): 2220 ft-lb.

2) Pusher Plate Screws (Item 36): 260 ft-lb.

H) API Drift:

1) API drift for 18.3/4"-10000 psi is 18.72".

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II APPLICABLE OPERATING CHARACTERISTICS AND PRINCIPLES OFOPERATION

 A) Packer/Donut Assembly

1) The packer is a cylinder of molded rubber combined with sixteen steelreinforcing inserts.

2) The donut is made of homogeneous molded rubber that surrounds thepacker.

3) The packer inserts are flanged on the top and bottom.

4) The shape of the flanges have been designed to maintain an unbrokenbarrier of steel above and below the packer rubber as the packer is closed,

regardless of the size or shape of the pipe or tool in the bore.

5) The uninterrupted barrier reduces rubber extrusion, even under high borepressure.

6) The rubber on the ID of the packer forms a pressure tight seal against thepipe or the tool in the BOP bore.

B) Hydraulic Operating System

1) The annular BOP does not depend upon wellbore pressure to close the

packer.

2) Closing pressure must be maintained to the operating system to hold thepacker in the closed position.

3) This independence of wellbore pressure gives the operator control of therubber pressure on the pipe, reduces packer extrusion, and can significantlyincrease packer life when the BOP is used for stripping.

C) Closing the Annular BOP

1) Hydraulic fluid is pumped into the closing chamber to force the piston and the

pusher plate upward against the donut.

2) The pusher plate squeezes the donut, forcing the donut to expand inward.

3) The inward displacement of the donut forces the packer inward toward thecenter of the bore.

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D) Opening the Annular BOP

1) Hydraulic fluid is pumped into the opening chamber to force the piston andpusher plate downward.

2) As the pusher plate is withdrawn, the donut returns to its relaxed shape,allowing the packer to return to its fully open position.

III DISASSEMBLY PROCEDURE

 A) Part Preparation Prior to Disassembly

The work area should be clean and well lighted.

B) BOP Disassembly

Refer to the Doc SD-010274-04-02

1) Clean the outside of the BOP body (1). Use high pressure water anddetergent to clean mud and debris from the outside of the BOP.

2) Make sure the BOP is fully open. Apply opening pressure and allow pressureto build up to the regulator pressure and make sure that the packer iscompletely open.

3) Remove and bleed all operating pressure.

4) Vent the operating system. Remove the plugs from the unused open andclose ports on the BOP body. This will eliminate the possibility of accidentaloperation of the BOP once the quick release Top is unlocked.

5) Inspect the Top trash seal (16). If the seal is damaged, it should be replacedas soon as possible, to keep mud and debris out of the mechanism of thequick-release top (2).

6) Open the access flaps on the Top trash seal (16). Clean out the cavityaround the head of each actuator screw. Do not reuse the grease removedfrom these cavities.

7) Grease the Actuator Screws (11). Inject a molybdenum disulfide or graphite-loaded grease fitting in the head of each actuator screw, until grease isforced up through the threads and comes out underneath the head of theactuator screw.

Note: The actuator screws should be greased before unlocking the quick release top.This should be done every  time the top is unlocked. This will make the screws turnmore easily and will reduce the possibility of thread galling.

8) To prepare for the removal of the quick-release top (2), install eye bolts (39)

in the tapped holes in the top.

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9) Using two wrenches, operate the actuator screws (11) in pairs of twoadjacent (NOT OPPOSITE!) screws, alternately lifting first one side of theactuator ring and then the other. Turn each actuator screw counter-clockwise, a few turns at a time, or until the screw starts to bind. A socket

wrench with a 12-inch handle works well for turning these screws.

Note: If only one wrench is used, the wrench should be moved from one screw to thenext, moving in the same direction around the ring.

10) When the actuator screws can no longer be turned using a wrench with a 12-inch handle, the actuator ring (10) has reached its uppermost position, andthe quick release top should be fully unlocked.

11) Clean out the vent ports using a stiff wire or rod. Attach lifting chains to the

lifting eyes in the top and lift the quick-release top out of the BOP body. If thetop is pulled at an angle instead of straight out, the top may bind in the BOPbody.

Danger: Dried mud or clogged vent ports may cause the quick release top to stick inthe BOP body. When lifting force is applied, the top may break loose suddenly. Usesafe rigging and lifting procedures to avoid injury.

Danger: The donut may hang in the quick release top as it is lifted out of the BOP body,and then fall from the top.

Note:  If the donut (7) hangs in the quick release top, lower the top to the floor, theninsert a pry bar through the bore FROM ABOVE and pry the donut loose.

12) Set the quick release top (2) down on a flat, clean surface.

13) Remove and inspect the top trash seal (16), being careful not to damage theseal.

14) Remove the actuator ring stop screws (37).

15) To remove the actuator ring/lock ring assembly, install eye bolts (38) in thetapped holes in the actuator ring (10), and lift the assembly off the quickrelease top.

16) Pull each actuator screw (11) from its slotted recess in the actuator ring (10).Remove the pair of actuator screw bearings (17) from each actuator screw.DO NOT remove the grease fitting from the head of the actuator screwunless it is damaged.

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17) Remove and inspect the Top ID (66) and Top OD (67) seal rings.

Warning:  To remove seals, use a dull tool, such as a screwdriver blade with the sharpedges removed. Insert the tool under the seal at one point, and carefully stretch the seal

out of the groove by pulling the tool around the entire circumference of the groove. Asharp tool may damage the seal or the seal groove.

18) Install eye bolts in the tapped holes in the top of the packer, attach liftingchains, and lift the packer out of the BOP body. If the donut does not comeout with the packer, use a pry bar to lift the donut in order to get a lifting straparound the donut.

19) Install eye bolts (41) in the tapped holes in the support plate (15) and removeit from the BOP.

20) Install eye bolts (41) in the tapped holes in the outer cylinder lock ring (14)and Remove it from BOP.

21) Remove the outer cylinder lock segments (13). Use a pry bar or a long flathead screwdriver to assist in the removal of the lock segments.

22) Use an air wrench to remove the inner cylinder nuts (31).

23) Remove the pusher plate screws (36).

24) Install lifting eyes (38) into the pusher plate (6) and remove it from the BOP.

25) Apply low pressure hydraulic fluid (up to 300 psi) to the BOP close port.Release the pressure as soon as the seal leaks.

26) Install lifting eyes (38) into the tapped holes in the top of the inner cylinder(4). Attach lifting chains and lift the operating system out of the BOP body (1).

C) Disassembly of the Operating System Outside the BOP

Note: In order to disassemble the operating system after it has been removed from theBOP, low pressure hydraulic fluid (up to 300 psi) is used to pump the inner and outercylinders off the piston. The ports in the outer cylinder and the ports in the piston mustfirst be tapped with a pipe tap. All but one of the ports are then plugged with pipe plugs,and low pressure hydraulic fluid is applied to the remaining port to pump the assemblyapart.

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1) If the pusher plate has not been removed, remove the pusher plate screws(36) and then lift the pusher plate (6) off the piston (3).

2) Tap the ports in the outer cylinder (5) so the outer cylinder may be pumped

off the piston. It is not necessary to tap and plug the small vent holes.

3) Plug all but one of the ports in the outer cylinder. Use NPT pipe plugs, anduse TFE thread sealing paste on the threads.

4) Slowly apply low pressure hydraulic fluid (up to 300 psi) to the remainingport. To prevent damage to the components, the assembly is suspended aninch or two above a sheet of plywood on the floor using lifting eyes (41)installed in the outer cylinder (5).

5) The piston/inner cylinder assembly will drop onto the wood without beingdamaged.

6) Remove all pipe plugs from the outer cylinder.

7) Tap the ports in the Piston (3).

8) Plug all but one of the ports in the piston (3).

9) Pump the assembly apart as in step 4.

10) Remove all pipe plugs from the piston.

11) Inspect the bearing rings, the seals, and the wiper rings.

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IV ASSEMBLY PROCEDURE

Refer to the Doc SD-010274-04-02

 A) Part Preparation Prior to Assembly

The work area should be clean and well lighted.

1) Remove all dirt, grit, oil, and contaminants from the ID sealing surfaces of theBody and all fluid passageways. Clean detergent and fresh water should beused for cleaning. High pressure air may also be used if it is dry air.

2) Clean the piston, the outer and inner cylinder, and the quick- release topusing clean detergent and fresh water. Lubricate areas that will come in

contact with other parts.

3) Sealed elastomer containers should not be opened until they are required forassembly. This is to prevent contamination and damage to the seals.

B) Assembly of the Quick-Release Top Outside the BOP

1) Place the top (2) on a pallet with the flange stud holes looking up.

2) Apply anti-seize to the outside threads of the four actuator screw inserts (12)and install them into the tapped holes of the quick-release top until the top ofthe insert is flush with the top of the hole. The top of each insert is slotted, toallow the insert to be turned with a screwdriver blade.

Note: The easiest way to install an insert is to first thread it onto an actuator screw andthen use the actuator screw as an insertion tool.

3) Apply anti-seize to the threads of the four insert retaining screws (45). Installthe retaining screws and tighten them securely with an Allen wrench.

4) Apply a light coat of grease to the outside surface (the teeth) of the lock ring(9) and apply a heavy coat of grease to the inside surface of the lock ring. Also, completely fill the axial grooves on the inside of the ring.

5) Position the actuator ring (10) inside the lock ring (9).

6) Install the actuator screws (11) into the actuator ring by first suspending theactuator ring/lock ring assembly above the quick-release top. Apply grease to

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the threads of the actuator screws and to the actuator screw bearings (17).Install a bearing on the top side and another on the bottom side of theactuator screw head. Slide each actuator screw into its recess in the actuatorring.

7) Install the actuator ring/lock ring assembly on the quick release top. Slowlylower the actuator ring/lock ring assembly into place on the quick release top,until the actuator screws can be started in the threads of the actuator screwinserts.

8) When all four actuator screws are started (at least two threads) in theactuator screw inserts without binding, remove the lifting chains.

9) Using two wrenches, operate the actuator screws in pairs of two adjacent(NOT opposite!) screws, alternately lowering first one side of the actuator ringand then the other. Turn each screw clockwise, a few turns at a time, or untilthe screw starts to bind. A socket wrench with a 12-inch handle works well forturning these screws.

10) If only one wrench is used, the wrench should be moved from one screw tothe next, moving in the same direction around the ring.

11) Using the actuator screws, lower the actuator ring approximately one inch, sothat the actuator ring stop screws (37) can be installed.

12) Apply anti-seize compound to the threads of the actuator stop screws (37)and seat all four screws fully before tightening any of them.

13) Install the quick-release top OD seal (67) with the sealing lips face up.

14) Using lifting chains, raise the entire top assembly and install the top ID sealring (66). Do not lubricate this seal or seal groove with grease.

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C) Assembly of the Hydraulic Operating System Outside the BOP

Reference:

•

  Inner Cylinder•  Outer Cylinder

•  Piston

•  Pusher Plate

1) Install the bearing rings, seal rings, and wiper rings on the piston.

(a) Install the piston ID seal ring (61). The lip faces down.

(b) Install the piston ID bearing ring (51).

(c) Install the piston OD seal ring (62). The lip faces down.

(d) Install the piston OD bearing ring (54).

2) Install the bearing rings, seal rings, and wiper rings on the outer cylinder.

(a) Install the outer cylinder ID wiper ring (56). The scraper end is up.

(b) Install the outer cylinder ID bearing ring (52).

(c) Install the outer cylinder ID seal ring (upper) (63). The lip faces up.

(d) Install the outer cylinder ID seal ring (lower) (63). The lip faces down.

(e) Install the outer cylinder OD seal ring (upper and lower) (65). The lipfaces down.

3) Install the bearing rings, seal rings, and wiper rings on the inner cylinder.

(a) Install the inner cylinder ID seal ring (upper) (58). The lip faces up.

(b) Install the inner cylinder ID seal ring (lower) (59). The lip faces down.

(c) Install the inner cylinder OD wiper ring (57). The scraper end is up.

(d) Install the inner cylinder OD bearing ring (52).

(e) Install the inner cylinder OD seal ring (upper) (60). The lip faces up.

(f) Install the inner cylinder OD seal ring (lower) (60). The lip faces down.

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D) Assembly of the Inner Cylinder onto the Piston.

1) Apply a light coat of light grease or STP oil treatment to the inner surface ofthe piston and to the outer surface of the inner cylinder.

2) Place the piston (3) on a flat, clean surface.

3) Lower the inner cylinder (4) onto the piston.

4) Keep the inner cylinder level, and make sure the seals do not slip out of thegrooves and become pinched or cut as the inner cylinder slides into thepiston.

5) Lower the inner cylinder slowly, and inspect each seal as it engages with thepiston.

6) Seat the inner cylinder on the piston by placing a packer on the inner cylinderand then set the BOP body on top of the packer. The weight of the BOP bodyshould be sufficient to seat the inner cylinder on the piston.

7) Remove the BOP body and the packer, then install lifting eyes in the piston.Lift the assembly, and inspect the underside of the piston to ensure that thepiston ID seal ring and the piston ID bearing ring have not extruded out of thegroove.

E) Assembly of the Outer Cylinder onto the Piston

1) Apply a light coat of light grease or STP oil treatment to the outer surface ofthe piston.

2) Place the piston/inner cylinder assembly on a flat, clean surface removelifting eyes.

3) Apply a light coat of light grease or STP oil treatment to the inner surface ofthe outer cylinder (5).

4) Install lifting eyes (41)in the outer cylinder (5) and lower it onto the piston.Keep the outer cylinder level, and make sure the seals do not slip out of thegrooves and become pinched or cut as the cylinder slides onto the piston.

5) Lower the outer cylinder slowly, and inspect each seal as it engages with the

piston.

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6) Seat the outer cylinder on the piston by placing the quick-release top (2) onthe outer cylinder, then place the BOP body (1) on the quick-release top. Thecombined weight should be sufficient to seat the outer cylinder on the piston.

7) Remove the BOP body and the quick-release top, then install lifting eyes (38)in the inner cylinder (4).

8) Lift the assembly, and inspect the bottom of the piston to ensure that thepiston OD seal ring and the piston OD bearing ring have not extruded.

F) Assembly of the Pusher Plate to the Operating System

1) Clean the tapped holes in the top of the piston.

2) Lower the pusher plate (6) onto the top of the piston (3).

3) Apply anti-seize compound to the pusher plate screws (36) and install them.

4) Fully seat all the pusher plate screws, then tighten them evenly to 260 ft-lb.

G) Installation of the Operating System as a Unit into the BOP body.

1) Lubricate the interior of the body by applying a light coat of grease or STP oiltreatment to the inside of the body below the locking grooves.

Note: Make certain that any plugs installed in the vents of the BOP body have beenremoved, and that all control system lines have been disconnected from the BOP.Otherwise, it may be impossible to seat the operating system in the BOP body.

2) Install eye bolts (38) in the tapped holes in the top of the inner cylinder (4).Do not attempt to lift the operating system using eye bolts installed in theouter cylinder.

3) Attach lifting chains and suspend the operating system above the BOP body.

4) Apply a light coat of grease or STP oil treatment to the outer surface of theoperating system.

5) Line up the holes in the inner cylinder with the studs in the BOP body, thenslowly lower the operating system into place.

6) Make certain the lip seals on the outside of the outer cylinder are not forced

out of the seal grooves, and use care not to pinch or cut them during theassembly process.

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7) Remove the lifting eyes (38) from the inner cylinder.

8) Apply anti-seize compound to the threads of the inner cylinder nuts (31) (Notto the studs!).

9) Draw the inner cylinder into place with the inner cylinder nuts.

Note: If the inner cylinder is sitting so high in the BOP body that the inner cylinder nutscannot be started onto the inner cylinder studs, place a few nuts on top of the innercylinder between the stud holes. Then place a packer on top of the nuts and use thequick-release top as a weight to force the inner cylinder down into the body.

10) Install the inner cylinder nuts and tighten them evenly to 2220 ft-lb.

11) Make sure the outer cylinder is properly seated. The shoulder of the outercylinder should be level with or slightly lower than the adjacent inner shoulderof the BOP body.

Note:  If the outer cylinder is too high in the BOP body, place three heavy hex nuts ofthe same size on the outer shoulder of the outer cylinder. Stand the nuts on edge, ifnecessary, and space the nuts evenly around the cylinder. Do not allow the nuts toprotrude beyond the outer edge of the outer cylinder. The inner cylinder nuts aresuitable for this application. Use the quick-release top as a weight to seat the outer

cylinder. Lower the top into the BOP body, and set it down on the nuts.

12) Install the outer cylinder lock segments (13) in the groove on top of the outercylinder.

13) Install the lock segment retaining ring (14) next to the lock segments.

14) Lower the support plate into place inside the pusher plate. Make certain therecesses in the underside of the support plate fit down over the inner cylinderstuds. The support plate should rest evenly on the inner cylinder nuts.

H) Final Assembly

1) Lubricate the inside of the BOP body by applying a light coat of grease orlight machine oil.

2) Apply a light coat of grease or light machine oil to the teeth of the lock ringand the lower surface of the quick-release top.

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3) Lubricate the OD and ID of the donut (7) with a light coat of grease. Makecertain the donut is installed top side up. The word "TOP" is molded into therubber and the top side of the donut has a long, smooth bevel on the OD.Use a fabric sling to lift the donut into the BOP.

4) Attach eye bolts (40) to the top of the inserts on the packer. Attach liftingchains to the eye bolts. Lift the packer into the BOP and position the packerinside the donut. Make sure the packer is installed top side up.

5) Lower the assembled quick-release top into the BOP body.

Note: The quick-release top is designed to rest on the shoulder within the BOP bodywhich is just below the locking grooves. When the top is resting on the shoulder, theupper surface of the top is flush with the upper surface of the BOP body. The top mustbe in this position before it can be locked.

6) Lock the quick-release top with the actuator screws. The quickest andeasiest way to lock the quick-release top is to use two wrenches.

7) Operate the actuator screws in pairs of two adjacent (Not opposite!) screws,alternately lowering first one side of the actuator ring and then the other.

8) Turn each actuator screw clockwise, a few turns at a time, or until the screw

starts to bind. A socket wrench with a 12-inch handle works well for turningthese screws.

9) When the actuator screws can no longer be turned with the 12-inch wrench,the actuator ring should be in its lowermost position. When the actuator ringis in this position, the teeth of the lock ring are fully engaged in the lockinggrooves of the BOP body, and the upper surface of the top trash seal isapproximately flush with the upper surface of the quick-release top. Thequick-release top is now locked.

10) Lubricate the new trash seal, apply a light coating of grease to the bottom ofthe seal to aid assembly. Position the new trash seal on the actuator ring,orient the seal so that the access flaps are directly above the actuatorscrews. Press the new trash seal into place, the trash seal dovetails onto theactuator ring, (a rubber mallet may be required to seat the seal).

11) Grease the actuator screws with molybdenum disulfide or graphite-loadedgrease in the grease fitting.

12) Pack the cavity around the head of each actuator screw with clean grease.

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13) Close the access flaps of the top trash seal.

14) Reinstall the pipe plugs which were removed to vent the operating system.

15) Verify operation of the BOP.

V OPERATION PROCEDURES

 A) Normal Operat ion

1) Operating Pressure General Recommendations

(a) A minimum closing pressure of 1500 psi is required to close and seal theBOP on pipe. Higher closing pressures (up to the rated working pressure

of 3000 psi) may be necessary, depending upon packer condition, pipesize, and ambient temperature. Neither the operating system nor thepacker will be damaged by application of up to 3000 psi closing pressure.

(b) Closing pressure should never be reduced below 1500 psi, except whenstripping. It is only during stripping that reduced closing pressure isbeneficial in prolonging packer life.

(c) A minimum opening pressure of 1500 psi is required for reliable operation.

The operating system will not be damaged by repeated application of upto 3000 psi opening pressure.

2) Closing the BOP on pipe or tools

(a) To close the BOP on pipe or tools, apply closing pressure while ventingthe opening port.

(b) If well fluid leaks past the packer, increase closing pressure as necessaryuntil the leakage stops, but do not exceed 3000 psi.

(c) Closing pressure must be continuously applied in order to hold the packerin the closed position.

3) Closing the BOP on open hole

(a) To close the BOP on open hole, apply the maximum available closingpressure (not to exceed 3000 psi) while venting the opening port.

Note: Every annular packer (including replacement packers) has been tested on openhole with a wellbore pressure of one half the rated working pressure of the BOP,

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according to API 16A, 3rd edition. As a packer wears, its ability to close and seal onopen hole will decrease, even though it may continue to hold full rated working pressurewhen closing on pipe.

4) Opening the BOP

(a) To open the BOP, apply opening pressure while venting the closing port.Opening pressure must never exceed 3000 psi.

Warning:  Operating system control valves may develop internal leakage. This leakagemay cause either the opening or the closing line to be pressurized when the valvehandle is set to "Neutral" or "No Pressure". This could result in unintended closing of theBOP. It is therefore recommended that the control valve handle be left in the "Open"position at all times when the operator wishes the BOP to be open.

VI MAINTENANCE PROCEDURES

 A) Rout ine Maintenance

1) Preparation and Safeguards prior to maintenance

(a) Use high-pressure water to clean mud and debris from the outside of theBOP.

(b) Apply opening pressure and allow pressure to build up to the regulatorpressure and make certain that the packer is completely open.

(c) Make certain all pressure is bled from both the opening and the closinglines.

(d) Vent the operating system by removing the plugs from the unusedopening and closing ports on the BOP body.

(e) Inspect the top trash seal for damage.

(f) Clean out the cavity around the head of each actuator screw.

(g) Grease the actuator screws.

Note: The actuator screws should be greased before unlocking the quick-release top.This should be done every time the top is unlocked. This will make the screws turn moreeasily and will reduce the possibility of thread galling.

2) Inspection and changeout of the packer and donut

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(a) The packer should be inspected weekly, after every pressure test,between wells, after stripping, and in the event of a packer leak.

(b) The packer should be replaced if there are vertical cracks or tears acrossthe full height of the sealing surface. Also, if a large portion of the sealingsurface has been gouged away, or if the packer has been exposed tohydrogen sulfide at temperatures in excess of 200 deg. F., the packershould be replaced.

3) Between-well servicing

(a) Between-well servicing consists of cleaning debris from the inside of the

BOP body and inspecting the packer and donut, followed by a test of thepacker. The quick-release top, the packer, and the donut must beremoved for this cleaning and inspection.

(b) Once the packer, the donut, and the quick-release top have beenreinstalled, the API Hydraulic Test (Packer Test) in accordance with APIRP 53 is performed. It is not necessary to open or service the operatingsystem at this time, as long as the specified operating fluids have beenused.

4) Disassembly and cleaning:

(a) Remove the quick-release top.

(b) Clean the quick-release top by using high-pressure water. Make certainthe lower surface of the top, the lock ring, and the actuator are clean.

(c) Remove, clean, and inspect the top trash seal.

(d) Reinstall the top trash seal.

(e) Inspect the seals and the wiper rings on the quick-release top.

Note:  The quick-release top ID lip seal should be replaced at each between-wellservicing.

(f) Remove, clean, and inspect the packer and donut.

(g) Remove the support plate.

(h) Clean out the inside of the BOP Body.

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(i) Clean out the vent ports with a stiff wire or rod.

5) Reassembly:

(a) Check tightness of pusher plate screws.

(b) Make certain the outer cylinder is fully seated.

(c) Apply a light coat of grease or light machine oil to the inside of the BOPbody.

(d) Lubricate the teeth of the lock ring and lower surface of the quick-releasetop.

(e) Install the support plate.

(f) Install the donut and packer.

(g) Replace and install the top ID lip seal with the sealing lip facing up.

(h) Install the quick-release top.

(i) Verify operation of the BOP and test the packer according to API RP 53.

B) Periodic Maintenance

1) Every two years, or as required by the appropriate regulatory agency,completely disassemble the preventer and:

(a) Clean all parts. Do not use a wire brush on sealing areas.

(b) Replace all rubber seals, gaskets, and O-rings.

(c) Replace the packer and donut according to its physical condition.

(d) Repair or replace damaged metal parts.

(e) After reassembly, test the packer and operating system in accordancewith this manual.

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C) TROUBLE-SHOOTING AND CORRECTIVE ACTIONS

1 LEAKS

If the packer in not holding bore pressure:

a) MAKE CERTAIN THAT THE OPERATING INSTRUCTIONS GIVEN IN SECTION(V-A) ARE BEING FOLLOWED.

b) MAKE CERTAIN THAT THE HYDRAULIC CONTROL SYSTEM MEETS THEREQUIREMENTS OF SECTION (I-E).

c) CHECK THE HYDRAULIC CONTROL SYSTEM PRESSURE. Pressure should

be checked as closely as possible to the closing port of the BOP, in order todetect any obstructions in the hydraulic lines. Closing pressure measured at theBOP closing port should not be less than 1500 psi, and may be increased to3000 psi if necessary to seal bore pressure.

d) MAKE CERTAINT HYDRAULIC CONTROL SYSTEM LINES ARE CONNECTEDTO THE OPENING AND CLOSING PORTS AND NOT THE VENT PORTS ORTHE LOCK RING ACCESS PORTS. If the packer still will not seal, or if leakageis observed from the vent ports of the BOP, use the trouble shooting chart todetermine the cause.

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YES NO

YESNO

BOTTOM

SIDEVENT

BOTTOM

SIDEVENT

NO

NO YES

DOESLEAKAG

E

SYMPTOM:

LEAKAGE THROUGH BOP BOREOR

BLEED ALL PRESSUREFROM THEBOP

CHECK FOR A LEAK TROM ONE SIDE OF THEOPERATING SYSTEM TO THE OTHER AS FOLLOWS:1) FULLY OPEN THE BOP2) BLEED CLOSING PRESSURE3) DISCONNECT THE CLOSING LINE AT THE BOP4) WAIT UNTIL DRAINAGE FROM THE CLOSING

PORT STOPS5) APPL Y OPENING P RES SURE

 

 APPLY CLOSINGPRESSURE

DOES FLUIDLEAK FROM THE

CLOSINGPORT?

RECONNECTCLOSING

LINE

CLOSE THE BOP AND APLY TEST

CONCLUSION:OPERATING

SYSTEM LEAKWILL NOT ALLOWPACKER

DOESLEAKAG

E

  APPLY OPENING

PRESSURE

FROMWHICH

VENTS ISI

DOES BOREFLUID LEAK

FROMTHEBOP

WHICHVENTS

CHECK:1.INNER

CYLINDER IDLIP SEAL(UPPER)

2.INNERCYLINDER ODLIP SEAL

INSPECTPACKER ANDDONUT ANDREPLACE IFNECESSARY

CHECK:1.PISTON ID LIPSEAL2.PISTON OD LIPSEAL3.OUTERCYLINDER OD LIPSEAL (LOWER)

CHECK:INNER CYLINDERID LIP SEAL(LOWER)

CHECK:1.OUTERCYLINDER OD LIPSEAL (UPPER)2.OUTERCYLINDER ID LIPSEAL (LOWER)

CHECK:INNER CYLINDEROD LIP SEAL(LOWER)

CHECK:1.QUICK

RELEASE TOPID LIP SEAL

2.OUTERCYLINDER IDLIP SEAL(UPPER)

Leak Trouble shooting chart

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2 PACKER WILL NOT OPENIf the packer will not open fully:

a) MAKE CERTAIN THAT THE OPENING PRESSURE IS REACHING THE BOP

OPENING PORT.

b) REMOVE PRESSURE FROM BOTH THE OPENING AND CLOSING SIDES OFTHE BOP OPERATING SYSTEM.

c) REMOVE THE PLUG FROM THE UNUSED CLOSING PORT.

d) APPLY OPENING PRESSURE.

If fluid does not leak from the BOP closing port, the BOP operating system is fullyopen. In this case remove the quick-release top, the packer, and the donut.Inspect the packer and donut for damage and check the pusher plate screws.

If fluid does leak from the closing port, then check the piston OD lip seal, thepiston ID lip seal, and the outer cylinder OD seal (lower) (see section III-C).

3 QUICK-RELEASE TOP

3.1 The Lock Ring Will Not DisengageEven though the actuator ring has been raised, the quick-release top will not

unlock if there is any upward force on the top. This is because the upward force willnot allow the teeth of the lock ring to retract from the locking grooves in the BOPbody. The likely sources of upward force on the quick-release top are:

a) Operating pressure in the operating system.

b) The BOP operating system is not fully open.

c) The pusher plate has become separated from the operating piston and isholding the donut and the packer in a partially-closed position.

d) The packer is severely damaged and this has caused the packer inserts tobecome wedged between the quick-release top and the support plate.

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CORRECTIVE ACTION:

a) MAKE CERTAIN THE BOP OPERATING SYSTEM IS OPEN. After applyingoperating pressure, bleed operating pressure and vent both the opening and theclosing sides of the operating system.

b) MAKE CERTAIN THE PACKER IS FULLY OPEN. If the packer is damaged andwill not fully open (because the packer inserts have become wedged between thequick-release top and the support plate), use a pry bar to force the inserts intothe open position and then attempt to unlock the quick-release top.

c) MAKE CERTAIN THE PROPER UNLOCKING PROCEDURE HAS BEENFOLLOWED(see section III-B-8).

d) VISUALLY DETERMINE WHETHER THE LOCK RING HAS DISENGAGEDFROM THE LOCKING GROOVES. In order to view the teeth of the lock ring,remove the hex-head plugs from the lock ring access ports on the outside of theBOP body. If the teeth of the lock ring have fully retracted from the lockinggrooves, see (3.2). Otherwise, continue with step.

e) DEPRESS THE QUICK-RELEASE TOP. If the teeth of the lock ring have notretracted from the locking grooves, the quick-release top must be forced back

down into the BOP body, in order to release pressure on the lock ring. When thetop is depressed, the lock ring should automatically retract from the lockinggrooves.

If the lock ring still does not retract from the locking grooves, it may be pried orpushed out of engagement while downward force is being applied to the top.

IF BOP IS IN PLACE ON THE WELLHEAD

If the BOP is in place on the wellhead, it may be possible to apply sufficient force

downward force on the quick-release top by resting a drill collar (at least 5000pounds) on the top. First, place a timber or a plate across the quick-release top,then rest the drill collar on the timber or plate.

PROCEDURE (USING BOLTS):

a) INSERT BOLTS OF THE PROPER SIZE AND THREAD INTO THE THREADEDLOCK RING ACCESS PORTS.

Note : on earlier models of the D BOP, the lock ring access ports are not tapped allthe way through. On these BOPs, the ring must be pried free, as described below in

the alternate procedure.

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b) FORCE THE LOCK RING OUT OF THE LOCKING GROOVES. With downwardforce applied to the quick-release top, screw the blots inward against the teeth ofthe lock ring, until the lock ring snaps into its unlocked position.

c) LIFT THE QUICK-RELEASE TOP OUT OF THE BOP BODY.

d) INSPECT THE BOP TO FIND THE CAUSE OF THE DIFFICULTY.

PROCEDURE (USING A SMALL PRY BAR):

a) REMOVE THE TOP TRASH SEAL. With the actuator ring in the up position, pullthe top trash seal off the ring. Be careful not to damage the seal.

b) REMOVE THE ACTUATOR RING STOP SCREWS.

c) USE THE ACTUATOR SCREWS TO RAISE THE ACTUATOR RING. Using twowrenches, operate the actuator screws in pairs of two adjacent (NOT opposite!)screws, alternately lifting first one side of the actuator ring and then the other.Turn each actuator screw counter-clockwise a few turns at a time, or until thescrew starts to bind, then move to the next screw. A SOCKET WRENCH WITH A12-inch handle works well for tuning these screws.

If only one wrench is used, the wrench should be moved from one screw to thenext, moving in the same direction around the ring.

Continue this process until the actuator screws are completely disengaged fromthe quick-release top.

d) REMOVE THE ACTUATOR RING. Install eye bolts in the tapped holes in theactuator ring, and lift the ring off the quick-release top.

e) PRY THE LOCK RING OUT OF ENGAGEMENT WITH THE LOCKINGGROOVES IN THE BOP BODY. Once the actuator ring is removed, the lock ringmay be reached with a pry bar. With downward force applied to the top, pry thelock ring free.

DANGER – The lock ring snaps into its relaxed position with very great force, expellinggrease and debris at high velocity. This may happen at any time during the followingprocedure. Keep your hands away from the inside of the ring, and wear eye protection.

f) LIFT THE QUICK-RELEASE TOP OUT OF THE BOP BODY.

g) REASSEMBLE THE ACTUATOR RING INTO THE QUICK-RELEASE TOP(see section IV-B).

h) INSPECT THE BOP TO FIND THE CAUSE OF THE DIFFICULTY.

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IF BOP IS NOT INSTALLED ON A WELL:

If the BOP is not installed on a well, either a jack or else the weight of the BOPbody may be utilized:

PROCEDURE (USING A HYDRAULIC JACK):

The quick-release top may be forced into the BOP body with a short hydraulic jack under a “W” shape fixed at each end with chains and shackles on twoopposite BOP lifting lugs. When the top is depressed by the jack, the lock ringshould retract from the locking grooves.

DANGER – Proper precautions are necessary to avoid injury. 

PROCEDURE (USING THE WEIGHT OF THE BOP BODY):

a) Attach lifting chains to the shackles of two adjacent lifting lugs on the BOP body.

b) Lift the BOP and lower it on its side.

c) Remove the chains from the shackles and attach a lifting chain to the bottomflange of the BOP.

d) Place a wooden block on the floor. The block must be larger than the bore of theBOP, but smaller than the inside diameter of the actuator ring.

DANGER  – Since the actuator ring is in the unlocked position, the quick-release topmay unlock and fall out of the BOP body at any time while the BOP is on its side orupside down.

e) Lift the BOP by the lifting chains attached to the bottom flange, and allow it toturn upside down.

f) Set the BOP down on the block, making certain the BOP is centered on theblock. The weight of the BOP body should be sufficient to depress the quick-release top enough to allow the lock ring to retract from the locking grooves.

g) Lift the BOP body straight up. The quick-release top, the donut, the packer, andthe support plate will remain on the floor.

THIS COMPLETES THE LOCK RING CORRECTIVE PROCEDURES.

3.2 The Top is Stuck in the BOP body

CORRECTIVE ACTION:

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a) MAKE CERTAIN THAT THE PROPER UNLOCKING PROCEDURE HAS BEENFOLLOWED (see section III-B-8).

b) MAKE CERTAIN THE TOP IS NOT BINDING DUE TO A NON-VERTICALPULLFROM THE LIFTING CHAINS. It may be necessary to use a small pry bar. Insertthe bar under the lip of the actuator ring on the low side of the top. While pullingup on the top (NOT on the actuator ring!) with a hoist and lifting chains.

c) VISUALLY DETERMINE WHETHER THE LOCK RING HAS DISENGAGEDFROM THE LOCKING GROOVES. In order to view the teeth of the lock ring,remove the hex-head plugs from the lock ring access ports on the outside of theBOP body. If the teeth of the lock ring have not fully retracted from the lockinggrooves, see (C-3.1).

d) CLEAN OUT THE VENT PORTS. Use a stiff wire or rod. Clogged vent ports canresult in formation of a partial vacuum as the top is pulled out of the BOP body,making removal of the top very difficult.

e) USE HYDRAULIC PRESSURE TO FREE THE QUICK-RELEASE TOP. If avisual inspection indicates that the lock ring has fully disengaged from the lockinggrooves, but the top still cannot be removed. Low-pressure hydraulic fluid (up to300 psi) may be applied to the vent ports on the side of the BOP body. The vent

ports must first be tapped for standard (NPT) pipe threads. Plug all except one ofthe vent ports. Use a low-volume test pump or a grease gun and apply pressureto the remaining vent port.

WARNING –  Under no circumstances should pressure be applied to the operatingsystem in an attempt to free the quick-release top.

f) LIFT THE QUICK-RELEASE TOP OUT OF THE BOP BODY (see section III-B-

WARNING  – Once the top has been removed, remove all plugs from the vent ports.

Clean excess grease (if a grease gun was used) from the quick-release top and fromthe inside of the BOP.

3.3 The Top Will Not Lock

CORRECTIVE ACTION:

a) CHECK TO SEE THAT THE QUICK-RELEASE TOP IS PROPERLY SEATED(see section IV-H-5). If the quick-release top is too high in the body, the teeth ofthe lock ring will not mate with the locking grooves in the BOP body, and the topcannot be locked.

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In order to view the teeth and the locking grooves, remove the hew-head plugsfrom the lock ring access ports on the outside of the BOP body.

NOTE – A defective or improperly installed quick-release top ID lip seal may prevent thetop from seating properly. 

b) IF THE TOP IS SEATED PROPERLY, CHEK FOR DEBRIS UNDER THE ACTUATOR RING. Use the following procedure to remove and reinstall theactuator ring:

1- REMOVE THE TOP TRASH SEAL. With the actuator ring in the up position,pull the top trash seal off the ring. Be careful not to damage the seal.

2- REMOVE THE ACTUATOR RING STOP SCREWS;

3- USE THE ACTUATOR SCREWS TO RAISE THE ACTUATOR RIG AND THELOCK RING. Using two wrenches, operate the actuator screws in pairs of twoadjacent (NOT opposite!) screws, alternately lifting first one side of theactuator ring and then the other. Turn each actuator ring and then the other.Turn each actuator screw counter-clockwise a few turns at a time, or until thescrew start to bind. A socket wrench with a 12-inch handle works well forturning these screws.

If only one wrench is used, the wrench should be moved from one screw to thenext, moving in the same direction around the ring.

Continue this process until the actuator screws are completely disengagedfrom the quick-release top.

4- REMOVE THE ACTUATOR RING/LOCK RING ASSEMBLY. Install eye boltsin the taped holes in the actuator ring, and lift the actuator ring/lock ringassembly off the quick-release top.

5- CLEAN DEBRIS FROM THE AREA BENEATH THE ACTUATOR RING. Also,

make certain that the bottom of the ring itself is clean.

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6- REINSTALL THE ACTUATOR RING/LOCK RING ASSEMBLY. Slowly lowerthe actuator ring/lock ring assembly into place on the quick-release top, untilthe actuator screws can be started in the threads of the actuator screwinserts.

When all four actuator screws are started (at least two threads) in the actuatorscrew inserts without binding, remove the lifting chains.

Using two wrenches, operate the actuator screws in pairs of two adjacent(NOT opposite!) screws, alternately lowering first one side of the actuator ringand then the other. Turn each screw clockwise, a few turns at a time, or untilthe screw starts to bind.

If only on wrench is used, the wrench should be moved from on screw to thenext, moving in the same direction around the ring.

Lower the actuator ring approximately one inch, so that the actuator ring stop

screws can be installed.

7- INSTALL THE ACTUATOR RING STOP SCREWS. Apply anti-seizecompound to the threads. Seat all four screws fully before tightening any ofthem.

8- INSTALL THE TOP TRASH SEAL (see section IV-H-10).

9- LOCK THE QUICK-RELEASE TOP (see section IV H 6).

c) IF THE QUICK-RELEASE TOP IS TOO HIGH IN THE BODY AND CANNOT BEPROPERLY SEATED, REMOVE IT (see section III-B-8). Check for debris on theunderside of the quick-release top.

d) MAKE CERTAIN THE DONUT HAS BEEN INSTALLED TOP SIDE UP (seesection IV-H-3).

e) CHECK THE POSITION OF THE PUSHER PLATE. The pusher plate is boltedto the piston. The piston/pusher plate assembly should be at the bottom of itsstroke. When the assembly is in this position, the top of the donut isapproximately flush with the top of the packer.

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f) CHECK FOR DEBRIS WITHIN THE BOP BODY. Check particularly thefollowing locations:

1- the locking grooves in the BOP body;2- the shoulder inside the BOP on which the quick-release top rests (the shoulder

 just below the locking grooves);

3- the top of the packer

4- the top of the donut;

5- the bottom of the packer

6- the top of the outer cylinder head

7- the vent holes in the wall of the BOP body.

3.4 The Top Has Been Locked While Outside the BOPCORRECTIVE ACTION:

a) LAY THE QUICK-RELEASE TOP ON A FLAT SURFACE OR ON TIMBERS.

b) USE THE ACTUATOR SCREWS TO RAISE THE ACTUATOR RING/LOCKRING ASSEMBLY. Operate the actuator screws in pairs of two adjacent (NOTopposite!) screws, alternately lifting first one side of the ring and then the other.Turn each actuator screw counter-clockwise, a few turns at a time, or until thescrew starts to bind. A pair of socket wrenches with 12-inch handles works well

for tuning these screws.

When the actuator screws can no longer be turned using a wrench with a 12-inchhandle, the actuator ring has reached its uppermost position.

c) DRIVE THE LOCK RING DOWN INTO THE UNLOCKED POSITION.

DANGER – The lock ring snaps into its relaxed position with very great force, crushinganything which lies between it and the actuator ring, and expelling grease and debris athigh velocity. This may happen at any time during the following procedure. Keep yourhands clear of this area, and wear eye protection.

Place the end of a timber (a 4 by 4, approximately three feet long) on the upperedge of the lock ring, opposite the gap. Strike the timber with a sledge, using thetimber to protect the lock ring from being damaged by the sledge. Continue theblows until the lock ring snaps into its relaxed (unlocked) position.

THE QUICK-RELEASE TOP IS NOW UNLOCKED.

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VII TESTING

 A) Function Test - With Pipe

Note: This test will be performed 2 times, with Paragraph C being performed in betweeneach test.

1) Install a 5" diameter pipe mandrel into the test stump.

2) Install the strip chart recorder and identify the device.

3) Apply 1500 psi +/- 200 psi to the close port as follows:

(a) Pump up the accumulator pressure to at least 2500 psi.

(b) Set the regulator to provide 1500 psi +/- 200 psi closing pressure.

(c) Move the control valve to the close position. The closing pressure at theBOP must be up to 1500 psi +/- 200 psi within five minutes after movingthe control valve to the close position. Less than five minutes would bepreferable.

4) Apply 200 psi wellbore test pressure.

5) After a minimum of 200 psi wellbore test pressure has been reached and has

stabilized, hold for a period of three minutes.

6) Increase the wellbore test pressure to 250 psi.

7) After a minimum of 250 psi wellbore test pressure has been reached and hasstabilized, hold for a period of five minutes.

8) Increase the wellbore pressure to full rated working pressure.

9) After full rated working pressure is reached and has stabilized, hold for thirtyminutes. This holding period may be reduced to fifteen minutes by thecustomer.

10) If the packer fails to hold pressure on the first test or develops a tear,discontinue the test. A new packer must be tested.

11) Bleed bore pressure to zero psi.

12) Check the packer for 18.72" API drift within 30 minutes.

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(a) The 30-minute time period starts when the operating piston is fully open.This is the time period when opening pressure builds up and can normallybe determined by watching the BOP open hose.

(b) The packer can be drifted outside the BOP as long as the drifting is donewithin the 30-minute period in a. If it takes more than 30 minutes after thepiston is fully open to remove the packer and drift it, the drift must beperformed with the packer in the BOP.

13) If the packer fails to drift within 30 minutes:

(a) Exercise the packer, (open-close cycles if required to achieve full drift).The exercise cycles should be performed immediately one after the otherand should not exceed more than a total of 15 exercise cycles, includingexercises performed per Paragraph A, step 15 and Paragraph B.

(b) The thirty-minute drift time starts after the last packer exercise (open-closecycle).

B) Operating Cycles

Using 1500 psi operating system pressure, open/close the BOP twenty times.

C) Drif t Test

DRIFT DIAMETER

BORE SIZE INCH DRIFT DIAMETER INCH

18.3/4 18.72

1) Open the BOP using 1500 psi hydraulic pressure.

2) Drift BOP through bore with a drift of 18.72" in diameter.

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VIII STORAGE

D) PreventerIf the BOP is to be stored for a period of a year or longer, the packer and donut shouldbe removed from the BOP and stored separately, following the packaging and storagerecommendations of section VIII B.

1) Clean the outside of the BOP body.

2) Disconnect the hydraulic hose at the close port and drain the operating fluidout of the BOP.

3) Attach a hydraulic line containing only preservation fluid to the close port.Use TOTAL EQUIVIS ZS 32

4) Disconnect the bottom open hydraulic port to allow the operating fluid to drainout of the BOP once closing pressure is applied to the close port.

5) Apply pressure to the closing port, allowing the operating fluid to drain out ofthe bottom open port. Once the fluid has completely drained, plug the openport.

6) Apply pressure to the opening port to fill the operating system with thepreservation fluid.

7) Release the pressure, disconnect the hydraulic lines, and install pipe plugsinto the open and close connections.

E) Elastomers

1) Store rubber products inside a cool, dark, dry storage.

(a) The preferred storage temperature range for rubber goods is from 40 deg.F (5 deg. C) to 80 deg. F (25 deg. C)

(b) Rubber goods should be wrapped or otherwise protected from directexposure to sunlight or artificial light with a high ultraviolet content (suchas fluorescent lighting). Do not store in direct sunlight even if wrapped, asoverheating will result.

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(c) Store rubber parts in a relaxed position. Do not stretch or hang O-ringsand seals. Labels should not be attached to seals with string, wire, ortape, 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 inthe storage area which may generate ozone, such as mercury vapor lamps,high-voltage electrical equipment, electric motors, or any electric apparatuswhich produces arcing.

4) Keep the rubber products clean and free of solvents, oil greases, or any othersemi-solid or liquid materials during storage. Rubber goods shouldspecifically 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 soapand water or methyl alcohol. After cleaning, the rubber goods should be driedat room temperature.

6) Examine the part before installation.

Important:  Rubber goods taken from storage must always be inspected beforeinstallation. Rubber goods should not be flexed at temperatures below 40 deg. F (5 deg.C). Rubber goods in storage should be inspected every 12 months to ensure that theyare still serviceable.

(a) Ensure that the part does not have a tacky surface or noticeable softeningor 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.