Additive for reducing gel strength in aqueous drilling fluids

Details Additive for reducing gel strength in aqueous drilling fluids Additive for reducing gel strength in aqueous drilling fluids

1974-07-22

1976-12-21

Guynn, Herbert B.

Compositions

Leather or fur treating

175 65, 252 85C, C09K 702

Patent

active

039987426

ABSTRACT:
The gel strengths and yield points of aqueous fresh water drilling fluids having from 0 to 200 parts per million calcium dissolved therein may be reduced by adding to the drilling fluids an effective amount of a hydrolyzed cereal solid, which is predominantly a hexa-saccharide and higher poly-saccharides. The additive is effective only if the drilling fluid pH is above about 10.0 and preferably about 11.0 or above. The effectiveness is improved by adding from about 1/8 to about 1 pound of a water soluble chromate or dichromate salt per barrel of drilling fluid.

REFERENCES:
patent: 2452021 (1948-10-01), Wayne
patent: 2713029 (1955-07-01), Fuller
patent: 2868726 (1959-01-01), Brukner et al.
patent: 3232871 (1966-02-01), Walker et al.
patent: 3849317 (1974-11-01), Walker

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