Compositions – Leather or fur treating
Patent
1972-10-16
1976-05-11
Padgett, Benjamin R.
Compositions
Leather or fur treating
252 85P, 252389R, C09K 700
Patent
active
039561429
ABSTRACT:
Water base drilling fluids having superior stability characteristics and having an improved noncorroding nature utilize an additive system comprising an alkali metal lignin, lignite, quebracho, and a water soluble chromium (VI) salt capable of introducing chromate ions into the alkaline water base mud system. An additive system having these four respective ingredients in a weight proportion of about 4:2:1:1 is admixed with a clay-water mixture to formulate the drilling fluid.
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patent: 3307625 (1967-03-01), Johnson et al.
patent: 3441504 (1969-04-01), Browning
Alexander Albert H. D.
McMordie, Jr. Warren C.
Wilson Doyne L.
Hunt B. H.
Oil Base, Inc.
Padgett Benjamin R.
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