Low solids shale controlling drilling fluid

Details Low solids shale controlling drilling fluid Low solids shale controlling drilling fluid

1974-12-09

1976-11-02

Guynn, Herbert B.

Compositions

Leather or fur treating

175 65, 252 85B, C09K 702, C09K 704

Patent

active

039896307

ABSTRACT:
An aqueous low solids drilling fluid especially suitable for drilling sloughing, mud yielding shale formations. The drilling fluid has an A.P.I. filtration rate in excess of 100 milliliters, a soluble calcium level in excess of 200 and preferably in excess of 1000 parts per million, a filtrate alkalinity greater than 0.1 milliliters of .02 N sulfuric acid per milliliter of filtrate, at least one pound per barrel excess or undissolved calcium hydroxide, a salinity of at least 50,000 parts per million and a ratio of plastic viscosity to yield point not greater than one.

REFERENCES:
patent: 2044758 (1936-06-01), Cross et al.
patent: 2732343 (1956-01-01), Rowe
patent: 2802783 (1957-08-01), Weiss et al.
patent: 2896915 (1959-07-01), Weiss et al.
patent: 3185642 (1965-05-01), Sawyer et al.
patent: 3852201 (1974-12-01), Jackson

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