In the off shore oil and gas industry wirelines are used as single wires for downhole service applications. For this purpose beside high mechanical strengths and lengths without welds, corrosion resistance against the aggressive sour gas conditions of the wells is required. These requirements are met by wirelines made of alloy 926 (UNS N08926), which are well established in the oil and gas industry. The even higher corrosion resistance against sour gas conditions and the mechanical behaviour of alloy 31 (UNS N08031), a new developed Fe-Ni-Cr-Mo alloy with additions of N, makes this alloy a new candidate for wirelines.

This paper presents the requirements for wirelines and shows, why alloy 926 and alloy 31 are well suited for this application.

Subject
Iron nickel chromium alloys, Materials, Corrosion resistant alloys, Stainless alloys, Wirelines, Nickel based alloys, Molybdenum alloys, Sour environments, Sour gas, Corrosion resistance, Sulfide stress cracking, Alloys, Stress corrosion cracking
Keywords:
alloy 926, UNS N06650, alloy 31, UNS N08031, slow strain rate test, pitting corrosion, crevice corrosion, environmental assisted cracking, stress corrosion cracking, sulphide stress cracking
© 2004 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2004
Association for Materials Protection and Performance (AMPP)
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