Water-wettable drilling mud additives containing uintaite

Compositions – Leather or fur treating

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Details

252 8510, 252 8511, C09K 706

Patent

active

050303651

ABSTRACT:
A water-based drilling mud additive comprising a pre-blended combination of about 2 parts of high softening point uintaite, about 1 part of a lower softening point uintaite, about 1 part of causticized lignite, and a strongly lipophilic, non-ionic surfactant is disclosed. This composition decreases shale sloughing and borehole instability during drilling of wells.

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IADC/SPE 17202--"Downhole Simulation Cell Shows Unexpected Effects of Shale Hydration on Borehole Wall", by J. P. Simpson et al., pp. 223-234.
IADC/SPE 17203--"New Laboratory Tests Evaluate the Effectiveness of Gilsonite as a Borehole Stabilizer", by N. Davis II et al., pp. 235-246.
Cagle et al., "Gilsonite Stabilizes Sloughing Shale", Oil & Gas Journal, Mar. 27, 1972, pp. 61-64.

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