1、Specification for Rotary DrillStem ElementsAPI SPECIFICATION 7FORTIETH EDITION,NOVEMBER 2001EFFECTIVE DATE:MARCH 2002AmericanPetroleumInstituteHelping YouGet The JobDone Right.COPYRIGHT 2003:American Petroloum InstituteSpecification for Rotary DrillStem ElementsUpstream SegmentAPI SPECIFICATION 7FOR
2、TIETH EDITION,NOVEMBER 2001EFFECTIVE DATE:MARCH 2002AmericanPetroleumInstituteHelping YouGet The JobDone Right.COPYRIGHT 2003:American Petroloum InstituteFOREWORDThis specification is under the jurisdiction of the API Subcommittee on Drill Stem Ele-ments and Compounds.American Petroleum Institute(AP
3、I)specifications are published as aids to the procure-ment of standardized equipment and materials,as well as instructions to manufacturers ofequipment or materials covered by an API specification.These specifications are notintended to obviate the need for sound engineering,nor to inhibit in any wa
4、y anyone frompurchasing or producing products to other specifications.The formulation and publication of API specifications and the API monogram program isnot intended in any way to inhibit the purchase of products from companies not licensed touse the API monogram.API specifications may be used by
5、anyone desiring to do so,and diligent effort has beenmade by the Institute to assure the accuracy and reliability of the data contained therein.However,the Institute makes no representation,warranty,or guarantee in connection withthe publication of any API specification and hereby expressly disclaim
6、s any liability orresponsibility for loss or damage resulting from their use,for any violation of any federal,state,or municipal regulation with which an API specification may conflict,or for theinfringement of any patent resulting from the use of an API specification.Any manufacturer marking equipm
7、ent or materials in conformance with the markingrequirements of an API specification is solely responsible for complying with all the appli-cable requirements of that specification.The American Petroleum Institute does not repre-sent,warrant or guarantee that such products do in fact conform to the
8、applicable APIspecification.Metric(SI)conversions of U.S.customary units are provided throughout the text of thisspecification in parentheses,e.g.,6 inches(152.4 millimeters).Metric equivalents of U.S.customary values are also included in tables and figures,some of which are reproduced inthe metric
9、system in Appendix M.Suggested revisions are invited and should be submitted to the standardization manager,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.This standard shall become effective on the date printed on the cover but voluntary con-formance to the revisions may be used in whole or in part and either in lieu of or in conjunc-tion with the current specification from the date of distribution to constitute conformancewith the edition applicable at the date of manufacture.衍COPYRIGHT 2003:American Petroloum Institute
