Wells – Processes – Graveling or filter forming
Patent
1985-01-17
1985-09-10
Novosad, Stephen J.
Wells
Processes
Graveling or filter forming
166297, 166 51, 175 452, E21B 4304, E21B 4310
Patent
active
045400512
ABSTRACT:
The invention provides a method and apparatus for effecting the perforating of a well casing and the gravel packing of the perforated areas of the well casing with one trip into the well of a combined perforating and gravel packing apparatus. This desirable objective is accomplished by a design of the crossover mandrel normally employed in gravel packing apparatus. The mandrel disclosed herein provides, in its run-in position, a continuous axial passage through its entire length, permitting a detonating bar to be dropped therethrough to actuate a perforating gun. Subsequent to the perforation operation, a ball is dropped and seated on an annular sleeve carried within the hollow mandrel which permits the development of internal pressure within the mandrel. Such internal pressure is employed not only to effect the setting of a fluid pressure actuated packer but also to shift the ball supporting sleeve downwardly and uncover a crossover port in the mandrel which permits the gravel packing operation to be carried out conventionally.
REFERENCES:
patent: 3072204 (1963-01-01), Brown
patent: 3361204 (1968-01-01), Howard et al.
patent: 3627046 (1971-12-01), Miller
patent: 3726343 (1973-04-01), Davis, Jr.
patent: 3913676 (1975-10-01), Barbee, Jr. et al.
patent: 3939927 (1976-02-01), Bohn
patent: 4372384 (1983-02-01), Kinney
Salerni John V.
Schmuck Phillip W.
Wetzel Rodney J.
Baker International Corporation
Bui Thuy M.
Novosad Stephen J.
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