Invert emulsion drilling mud

Details Invert emulsion drilling mud Invert emulsion drilling mud

1993-10-20

1995-12-05

Tucker, Philip

Earth boring, well treating, and oil field chemistry

Earth boring

Contains inorganic component other than water or clay

C09K 700

Patent

active

054729378

ABSTRACT:
A water-in-oil invert emulsion drilling mud is prepared with a nitrogen-containing compound, as a brine solution in the aqueous phase, to prevent the hydration of subterranean formation clays. Suitable nitrogen-containing compounds include alkali metal, alkaline-earth metal and ammonium nitrates and nitrites, and hydrates and complexes thereof. The nitrogen-based invert emulsion mud of the present invention eliminates the use of calcium chloride in the prior art invert emulsion drilling muds, thereby reducing the environmental impact of the drilling operation.

REFERENCES:
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patent: 2856356 (1958-10-01), Weiss et al.
patent: 2868726 (1959-01-01), Brukner et al.
patent: 2876197 (1959-03-01), Watkins
patent: 2896915 (1959-07-01), Weiss et al.
patent: 3311553 (1967-03-01), Weiss et al.
patent: 4360599 (1982-11-01), Loken et al.
patent: 4617048 (1986-10-01), Salladay et al.
patent: 5309999 (1994-05-01), Cowan et al.
patent: 5314022 (1994-05-01), Cowan et al.
English-Language Translation of SU 1,684,305 Abstract of SU 751,967 and English-language Abstract of SU751,967.

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