Preparation of sea water muds useful for earth drilling operatio

Details Preparation of sea water muds useful for earth drilling operatio Preparation of sea water muds useful for earth drilling operatio

1973-11-26

1976-05-04

Guynn, Herbert B.

Compositions

Leather or fur treating

252 85C, C09K 702

Patent

active

039546284

ABSTRACT:
A low viscosity sodium carboxymethyl cellulose polymer, e.g. which has a degree of substitution (D.S.) of, say, 0.9 or higher and a Brookfield viscosity of 400 to 3100 centipoise as a 2 percent solution in distilled water at 25.degree.C, when added to a non-dispersed sea water drilling fluid followed by addition of a sodium carboxymethyl cellulose (sodium CMC) which has a D.S. of, say, 0.9 or higher and Brookfield viscosity of greater than about 10,000 centipoise as a 2 percent solution in distilled water at 25.degree.C yields a low water loss drilling fluid which has a lower viscosity and lower gel strength than when the same materials are added in reverse order or when only one or the other is added step-wise by itself to the drilling fluid.

REFERENCES:
patent: 2425768 (1947-08-01), Wagner
patent: 3471402 (1969-10-01), Shannon
patent: 3668122 (1972-06-01), Branscum
Hercules Cellulose Gum--Properties and Uses, booklet published by Hercules Powder Co., 1960, pp. 1-10 and 17.
Hercules Cellulose Gum, booklet by Hercules Incorporated, Wilmington, Del., 1968, pp. 1-6, 10-22, 28, 29 and 31.

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