Scleroglucan based drilling mud
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United States of America Patent
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Mar 18, 1997
Issued Date -
N/A
app pub date -
Jan 17, 1995
filing date -
Apr 19, 1990
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Abstract
Base composition for water-based drilling muds allowing the number and the amount of the other constituents of the mud to be restricted. In addition to the base solvent, fresh water, sea water or salt water, the said base composition comprises scleroglucan as viscosity agent, the mycelium which produced it and bentonite or an equivalent in limited amount.
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