PDF- Multiple Orifice Valve Chokes, Cameron, -Choke Valves - Cameron Drilling Chokes

Chokes Technical Manual

Description

Operation and Maintenance Manual

Drilling Choke

All the information contained in this manual is the exclusive property of Cooper Cameron Corporation,

Cameron Willis Division

Any reproduction or use of the calculations,

is forbidden without the written permission of Cooper Cameron Corporation,

Cameron Willis Division,

Initial Release A1 October 1998

Copyright © 1998 all rights reserved by Cooper Cameron Corporation Cameron Willis Division

PREFACE The procedures included in this book are to be performed in conjunction with the requirements and recommendations outlined in API Specifications

Any repairs to the equipment covered by this book should be done by an authorized Cameron Willis service representative

Cameron Willis will not be responsible for loss or expense resulting from any failure of equipment or any damage to any property or injury or death to any person resulting in whole or in part from repairs performed by other than authorized Cameron Willis personnel

Such unauthorized repairs shall also serve to terminate any contractual or other warranty,

on the equipment and may also result in the equipment no longer meeting applicable requirements

File copies of this manual are being maintained

Revisions and/or additions will be made when deemed necessary by Cameron Willis

Additional copies of this copyrighted material can be purchased from Cameron Willis

The drawings in this manual are not scaled,

but the dimensions shown are accurate

SD numbers on drawings and photographs are for artwork identification only

Refer to component part numbers in all communications concerning this equipment

Direct any questions concerning the information in this manual to Cameron Willis Engineering

Direct requests for additional copies of this manual to the Technical Publications Department

Cameron Willis 10810 N

Freeway Houston,

Texas 77092 713-683-4600 http:\www

Contents Drilling Choke Maintenance

Preparation

Maintenance

Hydraulic Choke Troubleshooting

Choke Specifications

DRILLING CHOKE MAINTENANCE (T-069,9-98) I

PREPARATION Note: It is not necesssary to remove the choke from the manifold to perform the procedures outlines below

Hydraulic Drilling Chokes 1

Close all valves necessary to isolate the choke being serviced from well pressures

Place a warning tag on each valve closed in step 1 above,

to prevent the opening of the valves while maintenance is in progress

Place a warning tag on the hydraulic control for the choke being serviced,

to prevent its selection while maintenance is in progress

Warning: A serious accident may result if pressure enters the choke while it is disassembled

Manual Drilling Chokes 1

Close all valves necessary to isolate the choke being serviced from well pressures

Place a warning tag on each valve closed in step 1 above,

to prevent the opening of the valves while maintenance is in progress

Warning: A serious accident may result if well pressure enters the choke while it is disassembled

MAINTENANCE Important: It is recommended that this maintenance be performed as soon as practical after taking a kick

Choke Body 1

Ensure that the choke is fully open

Remove the actuator from the choke body,

using the appropriate actuator wrench

Use wrench P/N 40116 for hydraulic chokes

Use wrench P/N 41535 for manual chokes

Inspect the following critical areas on the choke body:

125" (104

00" (101

SD-017234

The actuator O-ring sealing area in the choke body

The constant removal of the actuator to change gates and seats makes this area susceptible to wear

The bore diameter should be 4

125" (104

000" [+

127mm/-

the body should be returned to Cameron Willis for repair

The bore of the choke body which houses the seat

This area is susceptible to wear and corrosion

The bore diameter should be 4

000" (101

000" [+

127mm/-

the body should be returned to Cameron Willis for repair

Choke Actuator 1

Inspect the O-ring groove(s) on the actuator nose OD every time the actuator is removed from the choke body

Remove any nicks or burrs with a fine emery cloth

Install new O-ring(s) into the groove(s)

Inspect the O-ring groove inside the actuator nose every time the gate is removed

Refer to Paragraph C for the gate removal procedure

If any chrome plating in or around the groove has been eroded,

the actuator body should be returned to Cameron Willis for repair

Install a new O-ring into the groove

Inspect the chrome plating on the actuator nose

If any of the chrome plating has been eroded down to the base metal,

the actuator body should be returned to Cameron Willis for repair

If any of the base metal has been eroded,

the actuator body should be replaced

Inspect the gate

Positive seal gates only: Any wear on the 45° chamfer prevents a carbide seal,

thus eliminating the positive sealing capability of the choke

The choke may still be used for throttling

subject to the limitations below

If the gate is worn more than

750" (19

If any part of the gate is worn completely through,

99" (50

If the gate is not worn,

Sealing Surface

Sealing Surface SD-017235

If the gate is worn,

reverse the gate as follows: a

Remove the retaining nut from the center of the gate

Clamp the gate pulling tool,

P/N 706610,

Knock the gate out,

using a hammer and screwdriver

Remove the gate pulling tool from the gate

Reverse the gate,

and install it into the actuator by pushing it into place

Ensure that the two lockwashers,

and the front and rear retainers,

are installed in the correct sequence

Important: If the gate is worn on both ends,

Install the retaining nut,

Seat and Wear Sleeve 1

Remove the seat

Hand Pump Adaptor

Yoke Centering Disc

Spirol Pin

Pulling Head Hydraulic Ram

Fingers

SD-017236

Turn the spirol pin counterclockwise,

retracting the fingers into the pulling head

Insert the tool,

P/N 614445-03,

Ensure that the centering disc is firmly seated in the bore

Turn the spirol pin clockwise until it stops,

extending the fingers and engaging the seat

Thread the hydraulic ram firmly against the yoke

Connect a 20,000 psi (1380 Bars) hydraulic hand pump to the tool at the adapter

Activate the pump

The hydraulic ram will pump the seat out of the bore

Release the hydraulic pump pressure and remove the tool and seat from the choke body

Turn the spirol pin counterclockwise,

retracting the fingers into the pulling head

Inspect the seat

If a positive seal is required

00" (50

75" (44

SD-017237

If the seat is to be used for throttling only: 1) Moderate wear on the 45° angles on the ID of the seat is acceptable

The seat may be used as a flow restrictor,

providing adequate back pressure can be maintained,

and no positive seal is required

Inspect the wear sleeve

Replace the wear sleeve if: a

It is worn through to the choke body

It is cracked or broken

Any part of it is missing

Insert the seat into the bore of the choke

Hammer the seat into position,

Install the actuator into the choke body by turning it clockwise

Tighten the actuator,

using the appropriate actuator wrench

Use wrench P/N 40116 for hydraulic chokes

Use wrench P/N 41535 for manual chokes

Hydraulic Choke Troubleshooting Important: Refer to Part I,

Preparation,

prior to disassembling the choke

Problem Choke will not open or close

Cause 1

Quick-connects are plugged

Solution a

Connect the CHOKE OPEN OIL and CHOKE CLOSE OIL outlets at the console together,

Attempt to circulate hydraulic fluid by moving the manual choke control lever either to OPEN or to CLOSE

If there is no circulation,

clean or replace the female quick-connects

If there is circulation,

connect the open and close hydraulic lines at the choke together,

using two female quick-connects

Attempt to circulate hydraulic fluid by moving the manual choke control lever either to OPEN or to CLOSE

If there is no circulation,

clean the male quick-connects or replace the hydraulic lines

If there is circulation,

clean or replace the female quick-connects on the choke actuator

Problem Choke will not open or close

Cause 2

Actuator piston seals are leaking (hydraulic pump in the console keeps pumping)

Solution a

Disassemble the actuator and inspect the cylinder bore

If the bore is scarred,

If the bore is not scarred,

replace all O-rings and reassemble the actuator

Hydraulic fluid leaking around the OD of the actuator cover

O-ring on the OD of the actuator is leaking

Clean the O-ring groove and replace the O-ring

Hydraulic fluid leaking around the position indicator box where it is bolted to the actuator cover

O-ring sealing the actuator rod and the cover is leaking

Clean the O-ring groove and replace the O-ring

Hydraulic fluid leaking from the body bleed ports

O-ring sealing the actuator rod and the actuator is leaking

Inspect the actuator rod

If the rod is scarred,

Clean the O-ring groove and replace the O-ring

Well pressure leaking from the body bleed ports (while attempting to achieve a positive seal at operating pressure or while testing the manifold)

Actuator body OD seal is leaking

Remove the actuator from the choke body

Clean the O-ring groove and replace the O-ring

If leaking persists,

remove the actuator from the choke body and inspect the sealing area in the choke body

If the ID dimension is not 4

005”/-

000” [+

127mm/-

000mm]),

Problem Well pressure leaking from the body bleed ports (while attempting to achieve a positive seal at operating pressure or while testing the manifold)

Cause 2

Actuator rod O-ring seal is leaking

Solution Remove the actuator rod from the actuator body

If the actuator rod is scarred,

Clean the O-ring groove and replace the O-ring

Well pressure is leaking 1

Gate and seat are not a

Ensure that the hydraulic from the outlet,

or achieving a carbide-topump pressure in the pressure cannot be carbide seal

console is set at 300 to maintained in the choke 325 psi (20

7 to 22

manifold (while attempting to achieve a b

Refer to page 10 for gate positive seal at operating and seat removal,

O-ring in the ID of the actuator nose around the OD of the gate is leaking

Remove the actuator from the choke body

Clean the O-ring groove and replace the O-ring

O-ring around the OD of the seat is leaking

Replace the O-rings around the OD of the seat

Refer to page 12 for seat removal procedure

If leaking persists,

inspect the bore in which the seat fits

There must be no scratches,

and the bore diameter should be 4

005”/-

000” [+

127mm/-

000mm])

Choke Specifications

Clearance Required To Remove Actuator

SD-017238

Hydraulically Actuated Chokes Assembly Number

Inlet Flange Size and Pressure

Outlet Flange Size and Pressure

Dimensions X

Clearance

626209-01

34” (232

38” (965

626215-01

34” (232

38” (965

626211-01

34” (232

38” (965

626211-02

34” (232

38” (965

626219-01

34” (232

38” (965

626330-01

34” (232

5” (1003

626330-04

34” (232

5” (1003

5” (444

38” (965

Clearance Required To Remove Actuator

SD-017239

Handwheel Operated Chokes Assembly Number

Inlet Flange Size and Pressure

Outlet Flange Size and Pressure

Dimensions X

Clearance

626208-01

34” (232

75” (755

626214-01

34” (232

75” (755

626210-01

34” (232

75” (755

626210-02

34” (232

75” (755

626457-01

34” (232

5” (876

626457-02

34” (232

5” (876

25” (158

50” (342

5” (876

Spare Parts Kit: 10,000 psi WP Hydraulic Drilling Choke P/N 49937-01 Rev

D7 Item 3 9 10 11 12 31 32 34 35 44 46 47 49

Part Number 614415-01 702640-11-44 702640-21-84 702640-24-14 31423-35-96-95 40853 614750-01 705926 702640-22-64 705925 614387-02 702640-34-24 705923 41819-01 667172-01-65 702640-11-11 667172-01-66

Qty 1 4 4 2 4 1 2 2 2 2 1 4 4 1 4 4 4

Description Gate,

Size 114 O-Ring,

Size 218 O-Ring,

Size 241 O-Ring Retainer Cap Lockwasher Back-Up Ring,

Size 241 O-Ring,

Size 226 Back-Up Ring,

Size 226 Seat,

Positive Seal O-Ring,

Size 342 Back-Up Ring,

Size 342 Position Indicator Replacement Washer,

Hansen O-Ring,

Size 111 Washer,

Seal-Quick

Note: Item numbers correspond to callouts on the exploded view illustration on page 20

Spare Parts Kit: 15,000 psi WP Hydraulic Drilling Choke P/N 626330-01-01 Rev

B1 Item 3 9 10 11 12 32 34 35 44 46 47 49 51 53

Part Number 614415-01 702640-11-44 702640-21-44 702640-24-14 31423-35-96-90 614750-01 705926 702640-22-64 705925 614387-02 702640-34-24 705923 140173-01-02-03 610108-08

Qty 1 2 2 2 2 2 2 1 1 1 2 2 1 1

Description Gate,

Size 114 O-Ring,

Size 214 O-Ring,

Size 241 O-Ring Lockwasher Back-Up Ring,

Size 241 O-Ring,

Size 226 Back-Up Ring,

Size 226 Seat,

Positive Seal O-Ring,

Size 342 Back-Up Ring,

Size 342 U Packing Back-Up Ring

Note: Item numbers correspond to callouts on the exploded view illustration on page 21

Spare Parts Kit: 10,000 psi WP Manual Drilling Choke P/N 626014-01 Rev

A1 Item 5 9 11 12 13 14 16 18 22 26 28 33 34 36 39 40

Part Number 705580-13 705580-15 705580-07 614415-01 40853 614750-01 705580-11 705580-09 705580-04 705580-01 705580-10 705925 705926 614387-02 702640-34-24 705923

Qty 4 4 2 1 1 2 2 2 2 2 2 2 2 1 4 4

Description O-Ring,

Size 010 O-Ring,

Size 218 O-Ring,

Size 226 Gate,

Size 241 O-Ring,

Size 233 O-Ring,

Size 215 O-Ring,

Size 012 O-Ring,

Size 236 Back-Up Ring,

Size 226 Back-Up Ring,

Size 241 Seat,

Positive Seal O-Ring,

Size 342 Back-Up Ring,

Size 342

Note: Item numbers correspond to callouts on the exploded view illustration on page 23

Spare Parts Kit: 15,000 psi WP Manual Drilling Choke P/N 626014-02 Rev

B2 Item 5 9 11 12 13 14 16 18 22 26 28 33 34 36 39 40 42 43

Part Number 702640-01-04 702640-21-44 702640-22-64 614415-01 40853 614750-01 702640-24-14 702640-23-34 702640-21-54 702640-01-24 702640-23-64 705925 705926 614387-02 702640-34-24 705923 140173-01-02-03 12543-57

Qty 4 2 2 1 1 2 4 2 2 2 2 2 4 1 4 4 1 1

Description O-Ring,

Size 010 O-Ring,

Size 214 O-Ring,

Size 226 Gate,

Size 241 O-Ring,

Size 233 O-Ring,

Size 215 O-Ring,

Size 012 O-Ring,

Size 236 Back-Up Ring,

Size 226 Back-Up Ring,

Size 241 Seat,

Positive Seal O-Ring,

Size 342 Back-Up Ring,

Size 342 U Packing Retaining Ring

Note: Item numbers correspond to callouts on the exploded view illustration on page 24

Western Hemisphere

Cameron Willis

Cameron

10810 N

Freeway

Box 1212

Houston,

Texas 77092

Tel 713

Tel 713

Fax 713

Fax 713

Eastern Hemisphere

Cameron Willis

Cooper Cameron (U

Aghafad,

Longford

Republic Of Ireland

Harlington

Tel 011 353 43 50600

Hayes UB3 5AR

Fax 011 353 43 41560

Tel 44 208 9901800

Fax 44 208 9901888 www

com Cameron Willis 5003 93rd Street

Asia Pacific/Middle East Cooper Cameron (Singapore) Pte

Number 2 Gul Circle,

Jurong Industrial Est

Locked Bag Service Number 3 Jurong Town Post Office

Edmonton,

Alberta T6E 5S9 Tel 403 434 3476 Fax 403 437 7397 www

Singapore 629560 Republic Of Sinapore Tel 65 8613355 Fax 65 8616197 www

Cameron Willis 10810 N

Freeway Houston,

TX 77092 713-354-1200

© Cooper Cameron Corporation,

Cameron Willis Division,

Printed in USA 10/98,

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