1、FOREWORDThis Recommended Practice is under the jurisdiction of the API Executive Committee onDrilling and Production Operations.Nothing contained in any API publication is to be construed as granting any right,byimplication or otherwise,for the manufacture,sale,or use of any method,apparatus,orprodu
2、ct covered by letters patent.Neither should anything contained in the publication beconstrued as insuring anyone against liability for infringement of letters patent.This document was produced under API standardization procedures that ensure appropriatenotification and participation in the developme
3、ntal process and is designated as an APIstandard.Questions concerning the interpretation of the content of this publication orcomments and questions concerning the procedures under which this publication wasdeveloped should be directed in writing to the Director of Standards,American PetroleumInstit
4、ute,1220 L Street,N.W.,Washington,D.C.20005.Requests for permission toreproduce or translate all or any part of the material published herein should also beaddressed to the director.Generally,API standards are reviewed and revised,reaffirmed,or withdrawn at least everyfive years.A one-time extension
5、 of up to two years may be added to this review cycle.Status of the publication can be ascertained from the API Standards Department,telephone(202)682-8000.A catalog of API publications and materials is published annually andupdated quarterly by API,1220 L Street,N.W.,Washington,D.C.20005.Suggested revisions are invited and should be submitted to the Standards and PublicationsDepartment,API,1220 L Street,NW,Washington,DC 20005,standardsapi.org.No roproduction or notworking permitled without liconso from IHS
