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_RP_19B-2021.pdf

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1、Evaluation of Well PerforatorsAPI RECOMMENDED PRACTICE 19BTHIRD EDITION,JULY 2021Special NotesAPI publications necessarily address problems of a general nature.With respect to particular circumstances,local,state,and federal laws and regulations should be reviewed.The use of API publications is volu

2、ntary.In some cases,third parties or authorities having jurisdiction may choose to incorporate API standards by reference and may mandate compliance.Neither API nor any of APIs employees,subcontractors,consultants,committees,or other assignees make any warranty or representation,either express or im

3、plied,with respect to the accuracy,completeness,or usefulness of the information contained herein,or assume any liability or responsibility for any use,or the results of such use,of any information or process disclosed in this publication.Neither API nor any of APIs employees,subcontractors,consulta

4、nts,or other assignees represent that use of this publication would not infringe upon privately owned rights.Users of this Recommended Practice should not rely exclusively on the information contained in this document.Sound business,scientific,engineering,and safety judgment should be used in employ

5、ing the information contained herein.Work sites and equipment operations may differ.Users are solely responsible for assessing their specific equipment and premises in determining the appropriateness of applying the Recommended Practice.At all times users should employ sound business,scientific,engi

6、neering,and judgment safety when using this Recommended Practice.API is not undertaking to meet the duties of employers,manufacturers,or suppliers to warn and properly train and equip their employees,and others exposed,concerning health and safety risksAPI publications may be used by anyone desiring

7、 to do so.Every effort has been made by the Institute to ensure 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 loss o

8、r damage resulting from its use or for the violation of any authorities having jurisdiction with which this publication may conflict.API publications are published to facilitate the broad availability of proven,sound engineering and operating practices.These publications are not intended to obviate

9、the need for applying sound engineering judgment regarding when and where these publications should be used.The formulation and publication of API publications is not intended in any way to inhibit anyone from using any other practices.Any manufacturer marking equipment or materials in conformance w

10、ith 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 products do in fact conform to the applicable API standard.All rights reserved.No part of this work may be r

11、eproduced,translated,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 Publishing Services,200 Massachusetts Avenue,NW,Suite 1100,Washington,DC 20001-5571.Co

12、pyright 2021 American Petroleum InstituteiiForewordNothing contained in any API publication is to be construed as granting any right,by implication or otherwise,for the manufacture,sale,or use of any method,apparatus,or product covered by letters patent.Neither should anything contained in the publi

13、cation be construed as insuring anyone against liability for infringement of letters patent.The verbal forms used to express the provisions in this document are as follows.Shall:As used in a standard,“shall”denotes a minimum requirement to conform to the standard.Should:As used in a standard,“should

14、”denotes a recommendation or that which is advised but not required to conform to the standard.May:As used in a standard,“may”denotes a course of action permissible within the limits of a standard.Can:As used in a standard,“can”denotes a statement of possibility or capability.This document was produ

15、ced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an API standard.Questions concerning the interpretation of the content of this publication or comments and questions concerning the procedures under which

16、 this publication was developed should be directed in writing to the Director of Standards,American Petroleum Institute,200 Massachusetts Avenue,NW,Suite 1100,Washington,DC 20001.Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.Generally,API standards are reviewed and revised,reaffirmed,or withdrawn at least every five years.A one-time extension of up to two years may be added to this review cycle.Status o

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