Drilling fluid

Details Drilling fluid Drilling fluid

1980-05-27

1982-03-30

Guynn, Herbert B.

Compositions

Leather or fur treating

252 855R, 525491, 525505, 528150, 528155, C09K 702

Patent

active

043223001

ABSTRACT:
A water-base well drilling, workover or completion fluid containing a fluid loss control agent prepared by pre-reacting sulfonated phenol with formaldehyde under alkaline conditions and then reacting the mixture with phenol under controlled conditions is described.

REFERENCES:
patent: 2560380 (1951-07-01), Wrightsman
patent: 2649414 (1953-08-01), Salathiel
patent: 2681312 (1954-06-01), Salathiel
patent: 3214373 (1965-10-01), Adolphson
patent: 3956140 (1976-05-01), Nahm et al.

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