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US 4,538,680 AGranted
Gun below packer completion tool string
AssigneeGeo Vann, Inc.
InventorsEmmet F. Brieger, Flint R. George, Edward A. Colle, Jr.
Life of this patent
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AssigneeGeo Vann, Inc.
InventorsEmmet F. Brieger, Flint R. George, Edward A. Colle, Jr.
Estimating the term…
A perforating gun is suspended downhole in a cased borehole, in underlying relationship relative to a packer device, and adjacent to a hydrocarbon-bearing formation to be completed. A connecting tubing interconnects the gun with the packer device, and includes a rupture barrier therebetween which prevents debris from accumulating within a gun firing head. An upper tubing string is removably connected to the packer device and forms a passageway which extends from the surface of the earth, down through the packer, and to the gun firing head. The upper tubing string includes a seal means and an extension tube which sealingly engages the packer device and penetrates the rupture barrier to provide a passageway through which the gun can be fired from the surface of the earth. This combination of elements prevents malfunction of the gun when the tool is left downhole for an appreciable length of time.
In a borehole which extends from a wellhead down through a formation located downhole thereof which is to be completed, a perforating gun having a gun firing head connected to a lower tubing string, the tubing string is connected to a packer device seated downhole at a location to locate the gun adjacent to said formation, the improvement comprising:
Tool string subassembly adapted for suspension from a packer located downhole in a borehole, said subassembly comprising:
Apparatus for completing a well comprising:
Well apparatus comprising:
Means forming a protective chamber including at one part of the chamber a detonator means exposed to the interior of the chamber and at another part of the chamber a penetrable barrier means;
Dependencies are inferred from the claim text.