High temperature drilling mud stabilizer

Details High temperature drilling mud stabilizer High temperature drilling mud stabilizer

1984-02-07

1985-10-15

Guynn, Herbert B.

Compositions

Leather or fur treating

252 85C, C09K 702

Patent

active

045472971

ABSTRACT:
Aqueous drilling fluids containing a hydroxy containing alumina component such as AlO(OH) and a polyvinyl alcohol (PVA) reaction product such as an aldehyde reacted PVA are stabilized for use at temperatures as high as 350.degree. F. (177.degree. C.) by adding stabilizer anions such as sulfate, tartrate and citrate to the resulting drilling fluid. The anions can be added as an acid or in the salt form with sodium and potassium salts being preferred. The salts are preferably added in 0.2 to 10% by weight of the drilling fluid. These stabilized drilling fluids can also be used in seawater.

REFERENCES:
patent: 3762485 (1973-10-01), Chesser et al.
patent: 4349443 (1982-09-01), Block
patent: 4389319 (1983-06-01), Block et al.
patent: 4428845 (1984-01-01), Block
patent: 4431550 (1984-02-01), Block

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