The cost implications of using corrosion resistant alloys (CRAs) for downhole tubing are often significant when assessing the viability of corrosive high temperature fields. The possibility of using internal coating materials to protect carbon steel is therefore a viable option. As part of a programme of work aimed at reducing well costs, the corrosion protection and mechanical properties afforded by a range of thin film coating materials have been investigated. The initial work involved evaluating the coatings corrosion protection in aggressive downhole conditions using high pressure autoclaves. Having established the ability to provide corrosion protection, the next stage was to assess the mechanical resistance to wireline abrasion and tool damage during downhole interventions. Problems associated with the use of thin film coatings downhole and recent concerns over the performance of CRAs are also discussed.

Subject
Costs, Coating performance, Thin films, Coatings, Materials, Wirelines, Tools, Coating damage, Tubing, Internal coatings, Carbon steel, Corrosion protection, Damage
Keywords:
Internal coatings, production tubulars, corrosion resistant alloys, aggressive downhole conditions, oil and gas production, galvanic corrosion
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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