Wells – Processes – Graveling or filter forming
Patent
1997-05-13
1999-08-03
Bagnell, David J.
Wells
Processes
Graveling or filter forming
166 51, E21B 4304
Patent
active
059312297
ABSTRACT:
A through tubing gravel pack assembly which is capable of being run on a coiled tubing string inside existing tubing for repairing a preexisting gravel pack. The through tubing gravel pack system comprises a hydraulically releasable running tool and service assembly, a hydraulically set through tubing packer assembly and a crossover sleeve and sliding sleeve valve assembly. The gravel pack assembly is adapted to be shiftable between a circulating mode and a squeeze mode for conducting a circulating gravel pack and/or a squeeze gravel pack without the necessity of having to trip the assembly out of the borehole.
REFERENCES:
patent: 4253522 (1981-03-01), Setterberg
patent: 4541486 (1985-09-01), Wetzel et al.
patent: 5219025 (1993-06-01), Berger et al.
patent: 5370180 (1994-12-01), Barbee
patent: 5377749 (1995-01-01), Barbee
patent: 5443117 (1995-08-01), Ross
patent: 5620050 (1997-04-01), Barbee
"Retrievable Hydraulic Packers for Coiled Tubing", Groundwater Protection Systems (undated).
Dorman et al., "Single-Trip Gravel Pack System Used Effectively on a Highly Deviated Well", Mar., 1994, Second International Conference on Coiled Tubing Operations.
Lehr Douglas J.
Matte James T.
Bagnell David J.
BJ Services Company
Elkassed Abdel G.
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