cup packer

cup packer

[′kəp ‚pak·ər]
(petroleum engineering)
A cup-shaped sealing device inserted into the drill stem and lowered into a well to permit pressure testing of the casing and blowout preventers.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Key Statement: The open end of the cup packer bore is filled with an elastomer to prevent the intrusion of sand and debris.