Foam gravel packer

Wells – Means for forming filter beds

Patent

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Details

166278, E21B 4304

Patent

active

046289933

ABSTRACT:
The present invention comprises a retrievable gravel packer especially adapted for gravel packing with a foam, for circulation and squeeze type gravel packing. The gravel packer includes a compression-set packer element, J-slot means to releasably maintain the gravel packer in an unset mode, ratchet means to releasably lock the gravel packer in a set mode, an intake passage to receive fluid from a tubing string, a return passage to receive fluid from a gravel screen below the gravel packer, a circulation passage extending from the exterior of the gravel packer to intake passage, closeable crossover means to receive fluid from the return passage, first valve means to prevent flow between the intake passage and the return passage, second valve means to prevent flow between the intake passage and the circulation passage, and valve actuation means for selectively opening and closing said first and second valve means.

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Abstract from application Ser. No. 756,885 by Gary D. Zunkel and Michael L. Bolin, filed 7/19/85.
Abstract from application Ser. No. 756,886 by Gary D. Zunkel filed 7/19/85.
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Abstract from application Ser. No. 757,040 by Gary D. Zunkel and Michael L. Bolin, filed 7/19/85.
Abstract from application Ser. No. 757,109 by Gary D. Zunkel filed 7/19/85.
Abstract from application Ser. No. 757,115 by Gary D. Zunkel filed 7/19/85.

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