Gravel packer

Details Gravel packer Gravel packer

E - Fixed Constructions

21

B

166/9

E21B 33/129 (2006.01) E21B 43/04 (2006.01)

Patent

CA 1254502

ABSTRACT The present invention comprises a retrievable gra- vel packer for circulation and squeeze type gravel packing. The gravel packer includes a compression-set packer element, a J-slot assembly to releasably maintain the gravel packer in an unset mode, a ratchet assembly 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, a closeable crossover assembly to receive fluid from the return passage, relief ports between the intake passage and the return passage, a first valve for closing said intake passage from said circulation passage, a second valve for opening communication through said relief ports, a check ball at the lower end of the gravel packer, and a check ball release assembly- for selectively releasing the check ball from the gravel packer.

514205

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