Balanced-activity improved inverse emulsion to inhibit brittle lutite hydration in oil fields
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United States of America Patent
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Oct 2, 1984
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N/A
app pub date -
May 17, 1982
filing date -
May 20, 1981
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Expired
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Abstract
An improved inverse emulsion for use as a drilling fluid that inhibits brittle lutite hydration. The emulsion includes a heavy oil; brine; a viscosity agent with thermostabilizing properties; an emulsifying agent; a thickening agent; a gelatinizing additive; and an alkaline earth metal hydroxide. The emulsion avoids hole collapsing and improves well gage stability.
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