1、Design,Operation,and Troubleshooting of Dual Gas-lift WellsAPI RECOMMENDED PRACTICE 19G9SECOND EDITION,APRIL 2015Special NotesAPI publications necessarily address problems of a general nature.With respect to particular circumstances,local,state,and federal laws and regulations should be reviewed.Nei
2、ther API nor any of APIs employees,subcontractors,consultants,committees,or other assignees make anywarranty or representation,either express or implied,with respect to the accuracy,completeness,or usefulness of theinformation contained herein,or assume any liability or responsibility for any use,or
3、 the results of such use,of anyinformation or process disclosed in this publication.Neither API nor any of APIs employees,subcontractors,consultants,or other assignees represent that use of this publication would not infringe upon privately owned rights.API publications may be used by anyone desirin
4、g to do so.Every effort has been made by the Institute to assure theaccuracy and reliability of the data contained in them;however,the Institute makes no representation,warranty,orguarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or
5、damage resulting from its use or for the violation of any authorities having jurisdiction with which this publication mayconflict.API publications are published to facilitate the broad availability of proven,sound engineering and operatingpractices.These publications are not intended to obviate the
6、need for applying sound engineering judgmentregarding when and where these publications should be utilized.The formulation and publication of API publicationsis not intended in any way to inhibit anyone from using any other practices.Any manufacturer marking equipment or materials in conformance wit
7、h the marking requirements of an API standardis solely responsible for complying with all the applicable requirements of that standard.API does not represent,warrant,or guarantee that such products do in fact conform to the applicable API standard.Users of this Recommended Practice should not rely e
8、xclusively on the information contained in this document.Sound business,scientific,engineering,and safety judgment should be used in employing the information containedherein.All rights reserved.No part of this work may be reproduced,translated,stored in a retrieval system,or transmitted by any mean
9、s,electronic,mechanical,photocopying,recording,or otherwise,without prior written permission from the publisher.Contact the Publisher,API Publishing Services,1220 L Street,NW,Washington,DC 20005.Copyright 2015 American Petroleum InstituteForewordNothing contained in any API publication is to be cons
10、trued as granting any right,by implication or otherwise,for themanufacture,sale,or use of any method,apparatus,or product covered by letters patent.Neither should anythingcontained in the publication be construed as insuring anyone against liability for infringement of letters patent.Shall:As used i
11、n a standard,“shall”denotes a minimum requirement in order to conform to the specification.Should:As used in a standard,“should”denotes a recommendation or that which is advised but not required in orderto conform to the specification.This document was produced under API standardization procedures t
12、hat ensure appropriate notification andparticipation in the developmental process and is designated as an API standard.Questions concerning theinterpretation of the content of this publication or comments and questions concerning the procedures under whichthis publication was developed should be dir
13、ected in writing to the Director of Standards,American PetroleumInstitute,1220 L Street,NW,Washington,DC 20005.Requests for permission to reproduce or translate all or any partof the material published herein should also be addressed to the director.Generally,API standards are reviewed and revised,r
14、eaffirmed,or withdrawn at least every five years.A one-timeextension of up to two years may be added to this review cycle.Status of the publication can be ascertained from theAPI Standards Department,telephone(202)682-8000.A catalog of API publications and materials is publishedannually by API,1220
15、L Street,NW,Washington,DC 20005.Suggested revisions are invited and should be submitted to the Standards Department,API,1220 L Street,NW,Washington,DC 20005,standardsapi.org.iiiContentsPage1Scope.12Terms,Definitions,Acronyms,and Abbreviations.12.1Terms and Definitions.12.2Acronyms and Abbreviations.
16、43Benefits of Dual Wells.43.1General.43.2More Efficient Drilling.43.3Dual Gas-lift Alternatives.44Dual Gas-lift Practices.54.1General.54.2Practices That Are Recommended.54.3Defining Unacceptable Wells.64.4Considering Alternatives to Dual Gas-lift.64.5Dual Gas-lift Well Design Issues.64.6Dual Gas-lift Operations.74.7Poor Candidates for Dual Gas-lift.84.8Considering Artificial Lift Alternatives to Dual Gas-lift.85Dual Gas-lift Well Designs.95.1General.95.2Mandrel Spacing.95.3Gas-lift Mandrel Spaci