Coiled Tubing Operations an Industry Recommended Practice (IRP) for the Canadian Oil and Gas Industry Volume 21 – 2017

IRP 21: Coiled Tubing Operations An Industry Recommended Practice (IRP) for the Canadian Oil and Gas Industry Volume 21 – 2017 EDITION: 2.0 SANCTION DATE: May 2017 Copyright/Right to Reproduce Copyright for this Industry Recommended Practice is held by Enform, 2017. All rights reserved. No part of this IRP may be reproduced, republished, redistributed, stored in a retrieval system, or transmitted unless the user references the copyright ownership of Enform. Disclaimer This IRP is a set of best practices and guidelines compiled by knowledgeable and experienced industry and government personnel. It is intended to provide the operator with advice regarding the specific topic. It was developed under the auspices of the Drilling and Completions Committee (DACC). The recommendations set out in this IRP are meant to allow flexibility and must be used in conjunction with competent technical judgment. It remains the responsibility of the user of this IRP to judge its suitability for a particular application. If there is any inconsistency or conflict between any of the recommended practices contained in this IRP and the applicable legislative requirement, the legislative requirement shall prevail. Every effort has been made to ensure the accuracy and reliability of the data and recommendations contained in this IRP. However, DACC, its subcommittees, and individual contributors make no representation, warranty, or guarantee in connection with the publication of the contents of any IRP recommendation, and hereby disclaim liability or responsibility for loss or damage resulting from the use of this IRP, or for any violation of any legislative requirements. Availability This document, as well as future revisions and additions, is available from Enform Canada 5055 – 11 Street NE Calgary, AB T2E 8N4 Phone: 403.516.8000 Fax: 403.516.8166 Website: www.enform.ca Table of Contents Coiled Tubing Operations Table of Contents 21.0 Preface ..................................................................................................... xi 21.0.1 Purpose ........................................................................................................ xi 21.0.2 Audience ...................................................................................................... xi 21.0.3 Scope and Limitations ................................................................................ xi 21.0.4 Revision Process ....................................................................................... xii 21.0.5 Sanction ...................................................................................................... xii 21.0.6 Acknowledgements ................................................................................... xiii 21.0.7 Range of Obligations ................................................................................ xiv 21.0.8 Background ............................................................................................... xiv Description of Coiled Tubing Operations ........................................... xiv Equipment Used in Coiled Tubing Operations .................................... xv Personnel for Coiled Tubing Operations ............................................. xv 21.1 Planning .................................................................................................... 1 21.1.1 Job Objectives .............................................................................................. 1 21.1.2 Well Classification and History ................................................................... 1 Well Control for Well Servicing ............................................................. 2 Well Control for Drilling ......................................................................... 5 21.1.3 Personnel Requirements ............................................................................. 6 Demonstrating Competence ................................................................. 6 Training/Certification for Well Servicing Operations .............................. 7 Training/Certification for Drilling Operations ......................................... 8 Welder Qualifications ........................................................................... 8 Experience Required for Critical Sour Operations ................................ 9 Supervision ........................................................................................ 10 21.1.4 Health and Safety Communication ........................................................... 11 21.1.5 Health and Safety Requirements ............................................................... 11 Hazard Assessments ......................................................................... 11 General Safety Requirements ............................................................ 11 Coiled Tubing Safety Requirements ................................................... 13 Critical Sour Well Servicing Safety Requirements .............................. 14 Critical Sour Over/Underbalanced Drilling Operations Planning and Safety Requirements ............................................................................................. 14 May 2017 i Coiled Tubing Operations Table of Contents Critical Sour Well Intervention ............................................................ 14 21.1.6 Emergency Response Plan ....................................................................... 14 21.1.7 Equipment Specifications .......................................................................... 14 21.1.8 Operational Practices and Procedures ..................................................... 15 21.2 BOP Stack and Accumulator Specifications ....................................... 17 21.2.1 Introduction ................................................................................................ 17 Definitions .......................................................................................... 18 Coiled Tubing and Jointed Pipe Operational Comparison ................... 18 21.2.2 General Requirements ............................................................................... 19 Stripper Considerations ...................................................................... 19 BOP Placement .................................................................................. 19 Barriers .............................................................................................. 20 Primary Flow Point ............................................................................. 20 Check Valve/Tubing Shutoff Device ................................................... 21 Reel Isolation Valve ............................................................................ 22 Pressure Deployment Considerations ................................................ 22 Ram-Type BOP Elements .................................................................. 23 Considerations for Underbalanced Versus Overbalanced Operations 23 21.2.3 BOP Stack Configurations for Well Servicing .......................................... 23 Category 0.......................................................................................... 24 Category 1A ....................................................................................... 26 Category 1B ....................................................................................... 28 Category 2 – Sweet ............................................................................ 30 Category 2 – Sour .............................................................................. 32 Category 3 – Sweet ............................................................................ 34 Category 3 – Sour .............................................................................. 36 Category 4 – Sweet or Sour ............................................................... 38 Category 5 – Sweet or Sour ............................................................... 40 Critical Sour ........................................................................................ 42 21.2.4 BOP Stack Configurations for Overbalanced Drilling ............................. 43 Class I ................................................................................................ 43 Class II ............................................................................................... 45 Class III .............................................................................................. 47 Class IV .............................................................................................. 49 Class V ............................................................................................... 51 ii May 2017 Table of Contents Coiled Tubing Operations Class VI .............................................................................................. 53 Critical Sour Drilling ............................................................................ 55 21.2.5 BOP Stack Configurations for Underbalanced Drilling ........................... 59 21.2.6 BOP Stack Configurations for Critical Sour Underbalanced Drilling ..... 59 21.2.7 Accumulator Configurations for Well Servicing ...................................... 64 Accumulator Systems ......................................................................... 64 Backup Nitrogen Systems .................................................................. 66 BOP Operating Controls ..................................................................... 67 BOP Coiled Tubing Unit Operating

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