Boring or penetrating the earth – Boring with explosion in inaccessible hole – Firing control mechanically actuated in bore
Patent
1985-05-22
1987-01-13
Novosad, Stephen J.
Boring or penetrating the earth
Boring with explosion in inaccessible hole
Firing control mechanically actuated in bore
E21B 4311
Patent
active
046357335
ABSTRACT:
Method and apparatus by which a gun firing head is maintained free of debris. An upper tubing string runs downhole in a cased borehole to a packer device. A jet gun, having a firing head located at the upper end thereof, is connected to a lower tubing string. A vent assembly is connected in series relationship within the lower string, and underlies the packer device. A barrier is contained within the lower tubing in underlying relationship to the vent and isolates the tubing interior immediately above the gun from contact with well fluids. A gun firing device is run from the surface, downhole through the packer device, and penetrates the barrier to gain access to the gun firing head, whereupon the gun is detonated, thereby perforating the casing and penetrating the payzone. Production occurs back through the perforations, up through the lower annulus, into the vent, and up the lower tubing string, through the packer, and up through the upper tubing string to the surface of the earth where the production is gathered.
REFERENCES:
patent: 2366373 (1945-01-01), Voorhees
patent: 3712378 (1973-01-01), Olivier
patent: 3931855 (1976-01-01), Vann et al.
patent: 4009757 (1977-03-01), Vann
patent: 4066282 (1978-01-01), Vann
patent: 4140188 (1979-02-01), Vann
patent: 4151880 (1979-05-01), Vann
patent: 4299287 (1981-11-01), Vann et al.
Vann; "Fill Disc Sub" more than a year before 06/07/82/.
Brieger Emmet F.
Colle, Jr. Edward A.
George Flint R.
Jones Hilton B.
Vann Roy R.
Bui Thuy M.
Halliburton Company
Novosad Stephen J.
Walkowski Joseph A.
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