Compositions – Leather or fur treating
Patent
1985-04-01
1986-09-30
Guynn, Herbert B.
Compositions
Leather or fur treating
175 72, C09K 702
Patent
active
046145990
ABSTRACT:
The disclosed invention is a novel drilling fluid additive for use in reducing lost circulation in wellbores and a method for employing the invention additive for reducing such lost circulation. The invention additive is lime encapsulated by a reaction-preventive protective casing to prevent the lime from reacting with clays in the borehole until it is desired to breach the casing. The reaction-preventive protective casing may be a film which will dissolve after a desired time of residence in the borehole or a film or waxy substance which will dissolve or melt at a desired temperature in the borehole, releasing the lime to react with clays in the formation or in the borehole to form a cement-like mass.
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Delhommer Harold J.
Guynn Herbert B.
Park Jack H.
Priem Kenneth R.
Texaco Inc.
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