Method of releasing stuck pipe or tools and spotting fluids ther

Details Method of releasing stuck pipe or tools and spotting fluids ther Method of releasing stuck pipe or tools and spotting fluids ther

1999-02-09

2000-11-21

Suchfield, George

Wells

Processes

Freeing stuck object, grappling or fishing in well

175 69, 507102, 507202, 507910, 507940, C09K 702, C09K 706, E21B 3100, E21B 3103

Patent

active

061489174

ABSTRACT:
Aphron-containing spotting fluids and their use in releasing pipe or tools stuck in the filter cake on the sides of a borehole are disclosed. The spotting fluids comprise a liquid, either aqueous, oleaginous, or mixtures thereof, a viscosifier which imparts a low shear rate viscosity to the fluids of at least 10,000 centipoise, an aphron-generating surfactant, and aphrons. The spotting fluids are used in a conventional method of releasing pipes or tools stuck in the filter cake on the sides of a borehole during conventional drilling or well servicing operations.

REFERENCES:
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patent: 3246696 (1966-04-01), Fox, Jr.
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patent: 4614235 (1986-09-01), Keener et al.
patent: 5127475 (1992-07-01), Hayes et al.
patent: 5141920 (1992-08-01), Bland et al.
patent: 5716910 (1998-02-01), Totten et al.
patent: 5881826 (1999-03-01), Brookey
patent: 5977030 (1999-11-01), House

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