Drilling fluid containing a copolymer filtration control agent

Details Drilling fluid containing a copolymer filtration control agent Drilling fluid containing a copolymer filtration control agent

1980-03-18

1981-10-06

Guynn, Herbert B.

Compositions

Leather or fur treating

252 85A, C09K 702

Patent

active

042934273

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, by utilization of a copolymer of: (1) a (meth) acrylamido alkyl sulfonic acid or alkali metal salt thereof; and (2) a (meth) acrylamide or N-alkyl (meth) acrylamide. The copolymer may be cross-linked with a quaternary ammonium salt cross-linking agent.

REFERENCES:
patent: 2718497 (1955-09-01), Oldham et al.
patent: 3679000 (1972-07-01), Kaufman
patent: 3734873 (1973-05-01), Anderson et al.
patent: 4024040 (1977-05-01), Phalangas et al.
patent: 4048077 (1977-09-01), Engelhardt et al.
patent: 4107057 (1978-08-01), Dill et al.

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