Additive for reducing fluid loss or filtration rate for aqueous

Details Additive for reducing fluid loss or filtration rate for aqueous Additive for reducing fluid loss or filtration rate for aqueous

1973-09-14

1976-05-11

Guynn, Herbert B.

Compositions

Leather or fur treating

252 85C, C09K 702

Patent

active

039561410

ABSTRACT:
The fluid loss or filtration rate of aqueous drilling fluids containing either high salinity or high soluble calcium can be controlled with conventional products such as prehydrolyzed starch; however, if the aqueous drilling fluid contains both high salinity and high calcium ion concentrations, starch is not effective for control of fluid loss. The fluid loss of such an aqueous drilling fluid saturated with calcium hydroxide and containing high levels of salinity may be reduced by adding to the drilling fluid a small but effective amount of a cationic starch product.

REFERENCES:
patent: 2399986 (1946-05-01), Chapman
patent: 2732343 (1956-01-01), Rowe
patent: 2802783 (1957-08-01), Weiss et al.
patent: 2813093 (1957-11-01), Caldwell et al.
patent: 2871189 (1959-01-01), Brukner
patent: 2876217 (1959-03-01), Paschall
patent: 2935509 (1960-05-01), Paschall
patent: 2975124 (1961-03-01), Caldwell et al.
patent: 3051699 (1962-08-01), Elizer et al.

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