Gravel packer

Details Gravel packer Gravel packer

1985-07-19

1987-01-13

Leppink, James A.

Wells

Means for forming filter beds

166126, 166131, 166150, E21B 4304

Patent

active

046357165

ABSTRACT:
The present invention comprises a weight-set single-zone gravel packer which may be retrieved from a gravel screen after gravel packing or, alternatively, left in place attached to the screen as a production packer. The gravel packer includes a compression-set packer element, a first 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 the interior of a gravel screen below the gravel packer, a closeable crossover assembly to receive fluid from the return passage to the wellbore annulus above the gravel packer, a first check valve to prevent flow down to the gravel screen through the return passage, a second check valve adapted to selectively connect the intake passage with the gravel packer, and a second J-slot assembly for selectively disconnecting the tubing string from the gravel packer.

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