Aqueous drilling fluid additive, composition and process
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United States of America Patent
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-
May 19, 1981
Issued Date -
N/A
app pub date -
Mar 18, 1980
filing date -
Sep 27, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to an aqueous drilling fluid composition, a filtration control agent for utilization in said aqueous drilling fluid, and a method of forming a filter cake on the wall of a well for the reduction of filtrate from said drilling fluid, which are effective at high temperatures and pressures, by utilization of a terpolymer of: (1) a monovalent alkali metal salt of acrylic acid; (2) an hydroxy alkyl acrylate; and (3) acrylamide.
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