Fail-safe one trip perforating and gravel pack system
Patent
·
OSTI ID:5784845
This patent describes a fail-safe one trip system for a combined gravel packing and perforating apparatus insertable in a cased well by a tubing string. The method of perforating and gravel packing the production zone of a subterranean well with one trip of a tubing conduit. This method consists of: assembling at the surface for attachment to the end of a tubing conduit: setting the first packer in a position above the desired production formation with the perforating mechanism adjacent the desired production zone; increasing the fluid pressure in the well annulus to a level sufficient to actuate the firing assembly; releasing the first packer and lowering, the tubing string to position the screen adjacent the perforated production zone, and then resetting the first packer; increasing the fluid pressure in the tubing string to a level sufficient to cause setting of the second packer; and introducing gravel carrying fluid through the tubing string to flow downwardly along the casing annulus between the first and second packers, through the screen, and upwardly through the tubing string to the casing annulus at a point above the second packer.
- Assignee:
- Baker Oil Tools Inc., Orange, CA
- Patent Number(s):
- US 4566538
- OSTI ID:
- 5784845
- Country of Publication:
- United States
- Language:
- English
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