Production Availability and Reliability - Alain Leroy - E-Book

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Alain Leroy

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Beschreibung

The objective of the book is to provide all the elements to evaluate the performance of production availability and reliability of a system, to integrate them and to manage them in its life cycle. By the examples provided (case studies) the main target audience is that of the petroleum industries (where I spent most of my professional years). Although the greatest rigor is applied in the presentation, and justification, concepts, methods and data this book is geared towards the user.

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Veröffentlichungsjahr: 2018

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Table of Contents

Cover

Preface

1 Basic Concepts

1.1. Introduction

1.2. Definition of terms

1.3. Definition of parameters

1.4. The exponential law/the constant failure rate

1.5. The bathtub curve

2 Mathematics for Reliability

2.1. Introduction

2.2. Basis of probability and statistics

2.3. Formulae and theorems

2.4. Useful discrete probability distributions

2.5. Useful continuous probability distributions

2.6. Statistical estimates

2.7. Fitting of failure distribution

2.8. Hypothesis testing

2.9. Bayesian reliability

2.10. Extreme value probability distributions

3 Assessment of Standard Systems

3.1. Introduction

3.2. Single item

3.3. System reliability

3.4. Specific architectures

3.5. On-guard items

4 Classic Methods

4.1. Introduction

4.2. Failure Mode and Effects Analysis

4.3. Fault trees

4.4. Reliability block diagrams

4.5. Monte Carlo method

5 Petri Net Method

5.1. Introduction

5.2. Petri nets

5.3. IEC 62551 extensions

5.4. Additional extensions

5.5. Facilities provided by software packages

5.6. Petri net construction

5.7. Case study

6 Sources of Reliability Data

6.1. Introduction

6.2. The OREDA project

6.3. The PDS handbook

6.4. Reliability Analysis Center/Reliability Information Analysis Center publications

6.5. Other publications

6.6. Missing information

7 Use of Reliability Test and Field Data

7.1. Introduction

7.2. Reliability test data

7.3. Field data

7.4. Accelerated tests

7.5. Reliability growth

8 Use of Expert Judgment

8.1. Introduction

8.2. Basis

8.3. Characteristics of the experts

8.4. Use of questionnaires

8.5. Use of interactive group

8.6. Use of individual interviews

8.7. Bayesian aggregation of judgment

8.8. Validity of expert judgment

9 Supporting Topics

9.1. Introduction

9.2. Common cause failures

9.3. Mechanical reliability

9.4. Reliability of electronic items

9.5. Human reliability

10 System Reliability Assessment

10.1. Introduction

10.2. Definition of reliability target

10.3. Methodology of system reliability study

10.4. SIL studies

10.5. Description of the case study

10.6. System analysis

10.7. Qualitative analysis

10.8. Quantitative data selection

10.9. System reliability modeling

10.10. Synthesis

10.11. Validity of system reliability assessments

11 Production Availability Assessment

11.1. Introduction

11.2. Definition of production availability target

11.3. Methodology

11.4. System analysis

11.5. Quantitative data selection

11.6. Production availability assessment

11.7. Synthesis

11.8. Uncertainty on the reliability parameters

11.9. Validity of production availability assessments

12 Management of Production Availability and Reliability

12.1. Introduction

12.2. Principles of dependability management

12.3. Technical specifications

12.4. Reliability and production availability program

12.5. Validation of system reliability

12.6. Validation of production availability

Appendices

Appendix 1: Notations and Abbreviations

Appendix 2: Markov Chain

Appendix 3: Comparison of Modeling Methods

Appendix 4: Solutions of Exercises

Bibliography

Index

End User License Agreement

List of Tables

1 Basic Concepts

Table 1.1.

The four safety integrity levels

2 Mathematics for Reliability

Table 2.1.

Useful rules of Boolean algebra

Table 2.2.

Median rank calculation for example 2.6

Table 2.3.

Validity of Benard’s formula

Table 2.4.

Calculations of Kolmogorov test statistic for example 2.7

Table 2.5.

Characteristics of the product of two specific conjugates

3 Assessment of Standard Systems

Table 3.1.

Reliability data for items in Figure 3.4

Table 3.2.

Value of PFD

avg

for five redundancy configurations (without CCF)

4 Classic Methods

Table 4.1.

Reliability and test data for case study 4.3.4

6 Sources of Reliability Data

Table 6.1.

Values of estimates assuming homogeneous and heterogeneous samples

8 Use of Expert Judgment

Table 8.1.

Comparison of the three elicitation methods

Table 8.2.

Comparison estimate of expert-true value

Table 8.3.

Formula for assessing constant failure rate and probability to fail upon demand

9 Supporting Topics

Table 9.1.

Weight of the factors in IEC 61508 table for assessing

β

Table 9.2.

Parameters of the shock method versus beta-factors

Table 9.3.

PDS method: value of main C

MooN

Table 9.4.

Impact of the CCF on system reliability

Table 9.5.

MIL-HDBK-217 environmental factors and oil and gas units

Table 9.6.

Comparison of reliability predictions according to [IMD 09]

Table 9.7.

Comparison of reliability predictions according to [EPS 05]

10 System Reliability Assessment

Table 10.1.

Examples of SIF

Table 10.2.

RRF and SIL equivalence

Table 10.3.

Selected reliability and proof test data

11 Production Availability Assessment

Table 11.1.

Mean production availability vs. number of runs (Monte Carlo simulation)

Table 11.2.

Example of additional results: use of support vessels for subsea plants

Table 11.3.

Comparison of results considering the uncertainty on the reliability parameters

Appendix 2: Markov Chain

Table A2.1.

Useful Laplace transforms

Appendix 3: Comparison of Modeling Methods

Table A3.1.

Reliability and capacity data

Table A3.2.

Results

Guide

Cover

Table of Contents

Begin Reading

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e1

Series Editor

Jean-Paul Bourrières

Production Availability and Reliability

Use in the Oil and Gas Industry

Alain Leroy

First published 2018 in Great Britain and the United States by ISTE Ltd and John Wiley & Sons, Inc.

Apart from any fair dealing for the purposes of research or private study, or criticism or review, as permitted under the Copyright, Designs and Patents Act 1988, this publication may only be reproduced, stored or transmitted, in any form or by any means, with the prior permission in writing of the publishers, or in the case of reprographic reproduction in accordance with the terms and licenses issued by the CLA. Enquiries concerning reproduction outside these terms should be sent to the publishers at the undermentioned address:

ISTE Ltd27-37 St George’s RoadLondon SW19 4EUUK

www.iste.co.uk

John Wiley & Sons, Inc.111 River StreetHoboken, NJ 07030USA

www.wiley.com

© ISTE Ltd 2018

The rights of Alain Leroy to be identified as the author of this work have been asserted by him in accordance with the Copyright, Designs and Patents Act 1988.

Library of Congress Control Number: 2018930621

British Library Cataloguing-in-Publication Data

A CIP record for this book is available from the British Library

ISBN 978-1-78630-168-0

Preface

Any industry is continuously modifying its processes, its organization and its management to cater for new problems. These modifications are part of the day-to-day job as long as these new problems look like the steps of a staircase. This approach is no longer valid if these new problems look like a wall: new equipment, new techniques, new principles, etc., are to be implemented. Reliability engineering emerged as an answer to some of these problems along the years; it finds its roots as a new discipline on the fact that “at the beginning of the Korean War about 70% of Navy electronic gear did not operate properly” [KEC 02]. Reliability engineering soon became part of the equipment development programs in the defense industry and in the civil nuclear industry, with an emphasis on safety performances.

Although it can be considered that the oil and gas industry started to implement these techniques by the mid-70’s with the beginning of subsea production, it took around one more decade for the industry to use them on a regular basis. However, the oil and gas industry is the first industry to perform production availability studies on a regular basis and as part of its plant development programs (offshore units first).

The aim of this book is to provide all of the information requested for efficient specification, assessment, follow-up and management of production availability and reliability characteristics of petroleum systems (upstream, midstream, downstream and petrochemical industries). However, nearly all of the book can be used in most industries, the “oil” theme being mainly on the examples of use provided. The chapters are grouped in five sections, which are given below.

1) Fundamentals are given in

Chapters 1

,

2

and

3

. Definitions as well as mathematics are kept at the minimum vital. However, the meaning and the validity of the bathtub curve and of the early life period are provided with details in

Chapter 1

. Nearly all of the mathematics used in this book is given in

Chapter 2

. Although it is uncommon to do a reliability calculation without a standard laptop computer, basic formulae as well as the availability and reliability of standard systems are given in

Chapter 3

. These formulae are to be considered as a tool for orientating and validating (as far as possible) complex calculations.

2) Modeling techniques are provided in

Chapters 4

and

5

and

Appendix 2

. Failure mode and effects analysis, reliability block diagrams, fault trees and Monte Carlo simulation are described in

Chapter 4

, but

Chapter 5

is dedicated to Petri nets that are not used so much in the oil and gas industry

1

. Markov chains are given in

Appendix 2

as they are not used to assess production availability or reliability parameters in the oil and gas industry.

3)

Chapters 6

,

7

and

8

explain the ways to obtain reliability data. It is uncommon to devote three chapters to reliability data (one on reliability data sources, one on methods for obtaining data from reliability tests and field and one on the use of expert judgment) but the rest of the book is meaningless without them.

4) Techniques that can be considered as a support to the others in the book are in

Chapter 9

. As the limit to high levels of reliability is a common cause of failure, their origin and the existing methods of analysis are presented and a review of existing data sources performed. However, a major theme, “the human factor”, is considered quite briefly as the validity of existing human error quantification methods and data has not been proved in the oil and gas industry. Review of reliability engineering of electronics items and reliability engineering of mechanical pieces are the other topics considered.

5) The assessment of system production availability and system reliability characteristics and their management are explained in

Chapters 10

,

11

and

12

. These chapters provide not only recommendations and case studies but also answers to questions such as “what we can expect from these studies, when to do them, how to perform them, how to specify them, how to include them within the plant life”.

Chapter 12

on management is not only the last chapter of the book but rather it is the one binding all of the others.

As the literature in reliability engineering is large, the references given allow the reader to go deeper into several topics. An extensive use of standards is made as their number and their quality improved drastically over last 10 years.

In any industry, production availability and reliability studies are too often considered as “nice to have”, aiming at demonstrating that contractual requirements are met. A way of preventing the occurrence of this deviation (source of waste of time and money) is to organize the collaboration of reliability technicians and oil and gas professionals all along the life of the project, as well as the use of up-to-date input data and the best modeling techniques. As such, the intended audiences for this book would be as follows:

1) Oil and gas practicing engineers who do not perform any production availability or reliability assessment but want to understand the available techniques, to know the data sources and the results to expect from such assessments.

Chapters 7

,

8

and

9

(except common cause failures) can be skipped for that purpose.

2) Experienced reliability analysts in such assessments seeking to extend their range of expertise. The reading of

Chapters 2

(apart from

section 2.9

on Bayesian reliability), 3, 4 and 7 is unlikely to participate in this extension.

3) Oil and gas managers wanting to understand the benefits of these assessments and the way to use them efficiently.

Chapters 1

,

10

,

11

and

12

are to be read in full for that purpose.

4) Students in availability and reliability wanting to improve their knowledge in production availability and reliability and to apply them to a specific industrial sector. For that purpose,

Chapters 6

and

12

can be skipped.

In addition, comments are provided in the introduction of each chapter to render the reading easier for each of these populations.

Although the book was designed to be easy to read, a rigorous approach was used for any subject. As such, mathematics is used extensively even for the definitions of terms.

I would like to thank my reviewers Brian Monty, Denis Berthelot and Frederic Doux, for their invaluable help.

Alain LEROYFebruary 2018

1

The author of the book started to work with Petri nets in the 80’s.