1、Recommended Practice for Repair, Testing, and Setting Gas Lift Valves API RECOMMENDED PRACTICE 11V7 SECOND EDITION, JUNE 1999 REAFFIRMED APRIL 2008 Recommended Practice for Repair, Testing, and Setting Gas Lift ValvesUpstream SegmentAPI RECOMMENDED PRACTICE 11V7 SECOND EDITION, JUNE 1999 SPECIAL NOT
2、ESAPI publications necessarily address problems of a general nature. With respect to partic- ular circumstances, local, state, and federal laws and regulations should be reviewed. API is not undertaking to meet the duties of employers, manufacturers, or suppliers to warn and properly train and equip
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7、(202) 682- 8000. A catalog of API publications and materials is published annually and updated quar- terly by API, 1220 L Street, N.W., Washington, D.C. 20005. This document was produced under API standardization procedures that ensure appropri- ate notication and participation in the developmental
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9、etroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005. Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the general manager. API standards are published to facilitate the broad availability of proven, sound engin
10、eer- ing and operating practices. These standards are not intended to obviate the need for apply- ing sound engineering judgment regarding when and where these standards should be utilized. The formulation and publication of API standards is not intended in any way to inhibit anyone from using any o
11、ther practices. Any manufacturer marking equipment or materials in conformance with the marking requirements of an API standard is solely responsible for complying with all the applicable requirements of that standard. API does not represent, warrant, or guarantee that such prod- ucts do in fact con
12、form to the applicable API standard.All rights reserved. No part of this work may be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher. Contact the Publisher, API P
13、ublishing Services, 1220 L Street, N.W., Washington, D.C. 20005.Copyright 1999 American Petroleum Institute FOREWORDa. This specication is under the jurisdiction of the API Subcommittee on Standardization of Field Operative Equipment. b. American Petroleum Institute (API) Recommended Practices are p
14、ublished to facilitate the broad availability of proven, sound engineering and operating practices. These Recom- mended Practices are not intended to obviate the need for applying sound judgment as to when and where these Recommended Practices should be utilized. c. The formulation and publication o
15、f API Recommended Practices is not intended to, in any way, inhibit anyone from using any other practices. d. Any Recommended Practice may be used by anyone desiring to do so, and a diligent effort has been made by API to assure the accuracy and reliability of the data contained herein. However, the
16、 institute makes no representation, warranty or guarantee in connection with the publication of any Recommended Practice and hereby expressly disclaims any lia- bility or responsibility for loss or damage resulting from its use, for any violation of any federal, state or municipal regulation with wh
17、ich an API recommendation may conict, or for the infringement of any patent resulting from the use of this publication. e. This Standard shall become effective on the date printed on the cover but may be used voluntarily from the date of distribution. API publications may be used by anyone desiring
18、to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for lo
19、ss or damage resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conict. Suggested revisions are invited and should be submitted to the general manager of the Upstream Segment, American Petroleum Institute, 1220 L Street, N.W., W
20、ashington, D.C. 20005.iii CONTENTSPage1 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
21、 3 ABBREVIATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 GAS LIFT VALVE DESIGNATION AND CONSTRUCTION . . . . . . . . . . . . . . . . . 1 4.1 Valve Designation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22、 . . . . . . . . . . . . . 1 4.2 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4.3 Material Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4.4 Equipment Repair
23、 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5 RECOMMENDED DISMANTLING AND REASSEMBLY OF USED GAS LIFT VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5.1 General . . .
24、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5.2 Dismantle Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5.3 Reassembly Procedure . . . . . . . . . . . . . . . . . . . . .
25、. . . . . . . . . . . . . . . . . . . . . . . . . 2 5.4 Bellows Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6 INSPECTION AND REASSEMBLY DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6.1 Source of Replacement Par
26、tsTerminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6.2 Inspection Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6.3 Reassembly Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27、 . . . . . . . . . 3 7 TESTING REBUILT VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7.2 Valve Core. . . . . . . . . . .
28、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7.3 Reverse Flow (Check) Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7.4 Valve Leakage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29、. . . . . . . . . . . . . . 4 7.5 Hydrostatic Aging Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.6 Valve Stem Travel Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 8 VALVE PRESSURE SETTING. . .
30、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 9 OPERATORS USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 APPENDIX A EXCERPTS FROM API SPEC 11V1, TESTING . . . . . . . . . . . . . . . . . . 9 APPENDIX
31、B EXCERPTS FROM API SPEC 11V1TEST PROCEDURES . . . . . . . . FOR GAS LIFT VALVES AND REVERSE FLOW VALVES . . . . . . 11 Figures 1 Tag for Wellsite Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Shop Form . . . . . . . . . . . . . . . . . . .
32、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2A Shop FormAll Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Reassembly and Test DataAll Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33、 8 15 Typical Sleeve Tester. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 16 Typical Encapsulated Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 17 Typical Gas Lift Valve Probe Test Fixture . . . . . .
34、 . . . . . . . . . . . . . . . . . . . . . . . . . 13 19 Typical Stem and Seat Leakage Testers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 20 Typical Stem and Seat Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14v 1Recommended Practice
35、 for Repair, Testing and Setting Gas Lift Valves1 ScopeRecommended Practice 11V7 applies to repair, testing, and setting gas lift valves and reverse ow (check) valves. This is a recommended practice to present guidelines related to the repair and reuse of valves; these practices are intended to serv
36、e both repair shops and operators. API RP 11V7 refers to test procedures used in API Specication 11V1 and Recom- mended Practice 11V2. Portions of these procedures are included in the appendices of this document. The injection gas pressure operated (IPO) bellows valve is one example of a commonly re
37、paired valve; the spring loaded production pressure operated (PPO) valve is also covered. Other valves, including bellows charged valves in production pressure operated service should be repaired according to the guidelines, however specialty valves are best repaired at the original manufacturers sh
38、op.2 ReferencesAPI Spec 11V1 Gas Lift Valves, Orices, Reverse Flow Valves and Dummy ValvesRP 11V2 Gas Lift Valve PerformanceNACE1MR-01-75 Sulde Stress Cracking Resistant Metallic Materials for Oileld Service3 AbbreviationsThe following abbreviations are used in this recommended practice:Pvo:Test rac
39、k opening pressure at 60F. PVOT:Test rack opening pressure at specied temperature (T).IPO: Injection pressure operated gas lift valve.PPO:Production pressure operated gas lift valve.4 Gas Lift Valve Designation and Construction4.1 VALVE DESIGNATIONThe code for designation of particular gas lift valv
40、es is pre- sented in API Spec 11V1. The designation code identies a valve as wireline or tubing retrievable, injection gas, spring or combination closing force, type of valveproduction pres- sure operated or gas injection pressure operated, size, etc. This basic designation code should apply to rebu
41、ilt as well as new valves. The rebuilder must permanently mark or etch the valve with date (MO/YR), Pvo, port size, and their name, symbol, or trademark for valve identication The valve should be marked using a low stress stamp or etching.4.2 DESIGNThe gas lift valves and reverse ow (check) valves t
42、hat are rebuilt according to this Recommended Practice should adhere to API Spec 11V1, as applied to component inter- changeability, dimensional tolerance of components, packing diameters of wireline retrievable devices, and methods of attachment to provide leak free connections. Component parts sho
43、uld be selected to permit interchange- ability within one type or model line. Dimensions and dimen- sional tolerances of the components of the valves to be rebuilt should not prevent proper operation of the assembled device.4.3 MATERIAL REQUIREMENTSThe material guidelines for metals and elastomers o
44、f the valves to be rebuilt are found in API Spec 11V1. For the initial valve installation in an H2S environment, new equipment is recommended and should comply with NACE MR-01-75. Subsequent replacement equipment should be rebuilt from valves whose components comply with the NACE specication. For ex
45、ample, the operator can use valves which come from the original completion and specify the components to maintain NACE compliance. Since alloy specications in used (exchanged) valves can- not be determined without extensive metallurgical testing, all metals should be assumed to be standard alloys of
46、 stainless steel or monel. Replacement parts should be made of stan- dard alloys equivalent to those provided by the original manu- facturer or as agreed between the repair shop and user. Seats and stems are easily replaced and materials for these components can be specied.4.4 EQUIPMENT REPAIR TERMI
47、NOLOGY 4.4.1 Rebuilt to Original Equipment Specication The terms implying restoration to original (new) equip- ment specications shall be applied to used equipment only when the replacement components match the original manu- facturers specications. These specications should be avail- able to the op
48、erator (purchaser). The term shall not be applied to valve brands and models that have been discontinued. The intent is to prevent use of the terminology when specications are not available for comparison.1NACE International, 1440 South Creek Drive, P.O. Box 218340, Houston, Texas 77218-8340. 2 API
49、11V74.4.2 Repaired Equipment per API Recommended Practice 11V7All equipment restored according to this Recommended Practice can be referred to as repaired equipment per API RP 11V7. All repair facilities should have readily available writ- ten procedures for inspection, disassembly, reassembly, and testing of gas lift equipment.4.4.3 Cleaned and ResetAll equipment that is only cleaned and the (test rack) open- ing pressure reset shall be referred to as cleaned and reset. Equipment in this category will not be stamped as is specied in 4.1 and will not
