Recommended Practice for Centralizer Placement and Stop-collar Testing

ANSI/API RECOMMENDED PRACTICE10D-2 FIRST EDITION, AUGUST 2004

REAFFIRMED, JANUARY 2020

ISO 10427-2:2004 (Identical), Petroleum and natural gas industries—Equipment for well cementing— Part 2: Centralizer placement and stop-collar testing

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Copyright © 2004 American Petroleum Institute

API Recommended Practice 10D-2 / ISO 10427-2

API Foreword

This standard shall become effective on the date printed on the cover but may be used voluntarily from the date of distribution.

API publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure 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 or damage resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conflict.

Standards referenced herein may be replaced by other international or national standards that can be shown to meet or exceed the requirements of the referenced standard.

Suggested revisions are invited and should be submitted to the API, Standards Department, 1220 L Street, NW, Washington, DC 20005, or by email to standards@api.org.

The form in this annex is intended for free exchange between owners/operators of the equipment or users of API RP 10D-2.

This American National Standard is under the jurisdiction of the API Subcommittee on Well Cements, SC10. This standard is considered identical to the English version of ISO 10427-2. ISO 10427-2 was prepared by Technical Committee ISO/TC 67 Materials, equipment and offshore structures for petroleum and natural gas industries, SC 3 Drilling and completion fluids, and well cements.

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API Recommended Practice 10D-2 / ISO 10427-2

Contents

Page

API Foreword ii

Foreword iv

Introduction v

1. Scope 1

2. Normative references 1

3. Terms and definitions 1

4. Methods for estimating centralizer placement 3

   1. General 3

   2. Standoff ratio calculation 4

   3. Buoyed weight of casing 5

   4. Calculations for centralizer spacing 6

5. Procedure for testing stop collars 9

   1. General 9

   2. Apparatus 10

   3. Test procedure 11

   4. Reporting of test results 11

Annex A (informative) Documentation of stop-collar test results 12

Bibliography 14

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