The PEI Journal is published quarterly. PEI members receive this magazine as a benefit of their membership.
Additional annual subscriptions are available to members for $49.00 and non-members for $129.00.
The PEI Journal is published by the Petroleum Equipment Institute, P.O. Box 2380, Tulsa, OK 74101-2380 USA.

Editorial correspondence should be sent to Robert Renkes, Managing Editor, Petroleum Equipment Institute, P.O. Box 2380, Tulsa, OK 74101-2380 USA; telephone +1 918 494 9696; fax +1 918 491 9895. Advertising correspondence and materials should be sent to Judy Flanagan, Data Key Communications, Inc., 5794 Widewaters Parkway, Dewitt, NY 13214; telephone +1 315 445 2347; fax +1 315 445 9336.

As the official magazine of the Petroleum Equipment Institute (PEI), a non-profit corporation, this publication carries authoritative notices and articles in regard to the activities of PEI. In all other respects, neither PEI nor the publisher of The PEI Journal, Data Key Communications, Inc. is responsible for the contents thereof or the opinions of the contributors.

Entire contents are Copyright © 2008 by Data Key Communications, Inc. All rights reserved. Nothing may be reproduced in whole or in part without written permission of the publishers. Data Key Communications, Inc. reserves the right to print portions of or all of any correspondence mailed to the editors without liability on its part and no such correspondence will be returned.

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