Wells – Processes – Freeing stuck object – grappling or fishing in well
Patent
1980-01-24
1981-07-21
Novosad, Stephen J.
Wells
Processes
Freeing stuck object, grappling or fishing in well
166 63, 166 65R, 166169, 166307, E21B 3103
Patent
active
042793041
ABSTRACT:
A wire line well tool is connected to a fluid gun which is run into the hole along with the tool. Should the tool become stuck, the gun is actuated, e.g. electrically, to direct mud active fluid around the stuck tool and the inside of the well bore, to destroy the pressure imbalance about the tool and to exert a radial force pushing the tool toward the center of the hole to free same.
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patent: 2308361 (1943-01-01), Fearon
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patent: 2900026 (1959-08-01), Trusheim
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patent: 3217802 (1965-11-01), Reddie et al.
patent: 3800876 (1974-04-01), Eggleston
patent: 4166500 (1979-09-01), McPhee
Oil Base, Inc., Bulletin, "SFT Sets Pipe Free", 5 pp.
Dresser-Magcobar, Drilling Fluids Product Data Memorandum, No. 1122, Nov. 11, 1969, one p.
Baker Oil Tools, Inc., "Operating Instructions, Wire Line Pressure Setting Assembly and Firing Head", Unit No. 3154, Aug. 15, 1977, 3 pp.
Conley Ned L.
Novosad Stephen J.
Robinson Murray
Rose David Alan
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