1、Gauging and Inspection of Casing, Tubing, and Line Pipe ThreadsAPI RECOMMENDED PRACTICE 5B1FIFTH EDITION, OCTOBER 1999REAFFIRMED, MAY 2015Gauging and Inspection of Casing, Tubing, and Line Pipe ThreadsUpstream SegmentAPI RECOMMENDED PRACTICE 5B1FIFTH EDITION, OCTOBER 1999REAFFIRMED, MAY 2015SPECIAL
2、NOTESAPI 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 towarn and properly train and equip
3、 their employees, and others exposed, concerning healthand safety risks and precautions, nor undertaking their obligations under local, state, or fed-eral laws.Information concerning safety and health risks and proper precautions with respect to par-ticular materials and conditions should be obtaine
4、d from the employer, the manufacturer orsupplier of that material, or the material safety data sheet.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, or prod-uct covered by lette
5、rs patent. Neither should anything contained in the publication be con-strued as insuring anyone against liability for infringement of letters patent.Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at least everyfive years. Sometimes a one-time extension of up to two year
6、s will be added to this reviewcycle. This publication will no longer be in effect five years after its publication date as anoperative API standard or, where an extension has been granted, upon republication. Statusof the publication can be ascertained from the APIUpstream Segment telephone (202) 68
7、2-8000. 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 notification and participation in the developmental process an
8、d is designated as an APIstandard. Questions concerning the interpretation of the content of this standard or com-ments and questions concerning the procedures under which this standard was developedshould be directed in writing to the general manager of theUpstream Segment, AmericanPetroleum Instit
9、ute, 1220 L Street, N.W., Washington, D.C. 20005. Requests for permissionto reproduce or translate all or any part of the material published herein should also beaddressed to the general manager.API standards are published to facilitate the broad availability of proven, sound engineer-ing and operat
10、ing practices. These standards are not intended to obviate the need for apply-ing sound engineering judgment regarding when and where these standards should beutilized. The formulation and publication of API standards is not intended in any way toinhibit anyone from using any other practices.Any man
11、ufacturer marking equipment or materials in conformance with the markingrequirements of an API standard is solely responsible for complying with all the applicablerequirements of that standard. API does not represent, warrant, or guarantee that such prod-ucts do in fact conform to the applicable API
12、 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 Publishing Services, 1220 L
13、 Street, N.W., Washington, D.C. 20005.Copyright 1999 American Petroleum InstituteUNCONTROLLED COPY-Copyright 1999 American Petroleum Institute FOREWORDThis recommended practice is under the jurisdiction of the API Subcommittee on Stan-dardization of Tubular Goods.No provision of this recommended pra
14、ctice shall be cause for rejection of casing or tubingprovided the threads are in accordance with the requirements of the latest edition of APIStandard 5B.This recommended practice is presented as a guide and instructional tool for pipe millinspectors, third party inspectors, and users interested in
15、 developing skills in inspection ofthreads on oil country tubular goods and line pipe. It includes pictures of numerous gaugesand measuring instruments. Every effort has been made to present gauges without regard tothe origin of manufacture. Additionally, inclusion of certain gauges should not be co
16、nstruedas an endorsement of the instrument or its manufacture. Similarly, the exclusion of anygauge is not an indication of dissatisfaction with that instrument.API publications may be used by anyone desiring to do so. Every effort has been made bythe Institute to assure the accuracy and reliability
17、 of the data contained in them; however, theInstitute makes no representation, warranty, or guarantee in connection with this publicationand hereby expressly disclaims any liability or responsibility for loss or damage resultingfrom its use or for the violation of any federal, state, or municipal re
18、gulation with which thispublication may conflict.Suggested revisions are invited and should be submitted to the general manager ofthe Upstream Segment, American Petroleum Institute, 1220 L Street, N.W., Washington,D.C. 20005.iiiUNCONTROLLED COPY-Copyright 1999 American Petroleum Institute UNCONTROLL
19、ED COPY-Copyright 1999 American Petroleum Institute CONTENTSPage1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、 . . . . . 11.2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.1 Requirements . . . . . . . .
21、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.2 Equivalent Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22、. . . . . . . . . . . . . . . . . . . 34 API THREADED CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44.1 Line Pipe Thread . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.2 Round Tubing and Casing Threa
23、ds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.3 Buttress Thread-Casing (Threaded and Coupled). . . . . . . . . . . . . . . . . . . . . . . . . 54.4 Extreme-Line Thread (Integral Connection). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84.5 Rounded Nose . .
24、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 VISUAL THREAD INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85.1 Visual Thread Inspection (VTI). . . . . . . . . . . . . . . . . . . . . . . . . . . .
25、. . . . . . . . . . . 85.2 Procedure for Evaluation of Visually Located Thread Imperfections . . . . . . . . 105.3 Procedure for Coupling Makeup Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 CARE OF INSPECTION GAUGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26、 . . . . . . . . . 136.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146.3 Handling. . . . . .
27、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146.4 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 CALIBRATION AND VERIFICATION OF DIAL INDICATORS ANDFIXED GAUGES .
28、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147.1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147.2 Verification . . . . . . . . . . . . . . . . . . . . . . . . .
29、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 THREAD INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
30、58.2 Inspection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158.3 Round Thread Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168.4 Line Pipe Thread Inspection . . . . . . . . . . . . . . . . .
31、 . . . . . . . . . . . . . . . . . . . . . . . 308.5 Buttress Thread Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338.6 Extreme-Line Thread Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379 SUPPLEMENTAL MEASUREMENT
32、S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 479.1 Thread Contour Microscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 479.2 Seal-Ring Groove Relative Depth and Concentricity Gauging . . . . . . . . . . . . . 47Figures1 Schematic Diagr
33、am of an Oil or Gas Well Completed with a Hung Liner . . . . . . . 12 Typical Pipe Coupling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Line Pipe Thread Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34、 6vUNCONTROLLED COPY-Copyright 1999 American Petroleum Institute Page4 Round Thread Casing and Tubing Thread Configuration . . . . . . . . . . . . . . . . . . . . 65 Buttress Thread Configuration for 133/8-in. OD and Smaller Casing . . . . . . . . . . . 76 Buttress Thread Configuration for 16-in. OD
35、 and Larger Casing . . . . . . . . . . . . . . 77 Extreme-Line Casing Thread Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 External Thread Inspection Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 Featheredge . . . . . . . . . . . . .
36、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1210 Razor Edge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1211 Dial-Indicator Type Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37、. . . . . . . . . . . . . 1312 Fixed-Type Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1413 Gauge Storage Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1414 Thread Depth Gauge Setting
38、 Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1515 Basic Dimensions of Line Pipe Threads and Casing andTubing Round Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1616 Pin End Thread on Which is Drawn a Longitudinal
39、 Line to FacilitateInspectionCoupling Longitudinal Line is Drawn in Similar Manner . . . . . . . . 1617 Picture of Scale Correctly Held for Total Thread Length Determination . . . . . . . 1718 Balanced-Dial Type Gauge for Measuring Thread Height of Internal Threadsand All External Threads. . . . . .
40、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1719 Thread Height Gauge for Internal Threads 3-in. OD and Smaller. . . . . . . . . . . . . 1720 Setting Standards for (a) API Round and Vee-Type Threads, (b) Extreme-Lineand 16-in. and Larger Buttress Threads, and (c) Ve
41、e-Block Setting Standardfor Contact and Point Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1821 Height Gauge Applied to Setting Standard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1822 Continuous-Dial Height Gauge Applied to a Vee Block .
42、. . . . . . . . . . . . . . . . . . . 2223 Continuous-Dial Type Gauge Applied to a Setting Standard. . . . . . . . . . . . . . . . . 2224 External/Internal Thread Height Gauge Applied to a Thread. . . . . . . . . . . . . . . . . 2225 Balanced-Dial Type Gauge Applied to Thread Showing Small Error inT
43、hread Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2226 Lead Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2327 Lead Setting Standard with External/Internal Lead G
44、auge Applied . . . . . . . . . . . 2528 External Thread Taper Caliper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2529 Internal Taper Caliper for 41/2-in. OD and Larger ShowingGauge Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
45、 . . . . . . . . . . . . . . 2530 Internal Thread Taper Caliper for Pipe Less Than 41/2-in. OD . . . . . . . . . . . . . . . 2631 Assembled Internal Taper Gauge for 41/2-in. OD and Larger Pipe . . . . . . . . . . . . 2732 Flush-Type Ring Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . .
46、. . . . . . . . . . . . . . . . . 2733 Insert Style Plug Gauge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2834 Step-Type Ring Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2835 Template-Type Ring Gaug
47、e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2836 Standoff of Master Plug and Working Ring Gauges . . . . . . . . . . . . . . . . . . . . . . . 2937 Standoff Lines Style Plug Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
48、38 Template Style Plug Gauge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3039 Full-Crested Threads and Triangle Stamp Measurement on a ButtressThread Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
49、 . . . 3340 Step-Type External/Internal Buttress Thread Height Gauge for 16-in., 185/8-in., and20-in. Diameter Pipe and Couplings and All Extreme-Line Casing Threads . . . . . . 3441 Buttress Thread Runout Gauge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3642 Buttress Thread Ring Gauge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3743 Extreme-Line Length Templates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3844 Extreme-Line Casing Configuration 5-in. through 75/8-in. OD. . . . .
