Method for releasing stuck drill pipe

Wells – Processes – Freeing stuck object – grappling or fishing in well

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Details

252 85A, E21B 3103, C09K 702

Patent

active

044946104

ABSTRACT:
A method is revealed for releasing a stuck drill string in a borehole of an underground formation by application of an additive fluid comprising a lower carbon number alcohol and optionally a weighting material and/or diluent.

REFERENCES:
patent: 3217802 (1965-11-01), Reddie et al.
patent: 3899431 (1975-08-01), Hayes et al.
patent: 4012329 (1977-03-01), Hayes et al.
patent: 4356096 (1982-10-01), Cowan et al.
patent: 4411800 (1983-10-01), Green et al.
Gray et al., Composition and Properties of Oil Well Drilling Fluids, Fourth Ed., 1980, Gulf Publishing Co., Houston, Tex., pp. 546, 547, 560 to 564.

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