Compositions – Leather or fur treating
Patent
1983-04-21
1985-10-22
Lechert, Jr., Stephen J.
Compositions
Leather or fur treating
166902, 252 855E, 252387, C09K 704
Patent
active
045487200
ABSTRACT:
The present invention relates to a process for scavenging hydrogen sulfide which frequently becomes entrained in drilling fluid during the course of drilling operations through subterranean formations. The process consists of introducing a solid oxidant in powdered form into the circulating drilling fluid when hydrogen sulfide is encountered. The solid oxidants are selected from the group consisting of calcium hypochlorite (Ca(OCl).sub.2), sodium perborate (NaBO.sub.3), potassium permanganate (KMnO.sub.4), and potassium peroxydisulfate (K.sub.2 S.sub.2 O.sub.8). The solid oxidants are soluble in the drilling fluid, promoting fast and complete scavenging reactions without adversely altering the drilling fluid rheology.
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Technology, Apr. 20, 1981, Oil and Gas Journal, p. 63.
Diamond Shamrock Chemicals Company
Dunlap Thoburn T.
Lechert Jr. Stephen J.
Locker Howard J.
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