Method of sealing pores, and lost circulation additive therefor

Details Method of sealing pores, and lost circulation additive therefor Method of sealing pores, and lost circulation additive therefor

1979-06-21

1981-01-27

Guynn, Herbert B.

Compositions

Leather or fur treating

175 72, C09K 702

Patent

active

042474035

ABSTRACT:
By separating the woody ring portion of corncobs from the pith and chaff portions a lost circulation additive for drilling muds is produced which does not appreciably increase the yield point of the drilling mud. Improved particle size distributions for lost circulation additives is also given and claimed which permits low concentrations of the additive to produce seals withstanding 1000 psig.

REFERENCES:
patent: 2812161 (1957-11-01), Mayhew
patent: 2943679 (1960-07-01), Scott et al.
patent: 2943680 (1960-07-01), Scott et al.

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