C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/18
C09K 8/20 (2006.01)
Patent
CA 1317448
32268CA ABSTRACT An improved aqueous drilling fluid additive comprising chromium acetate and sulfoalkylated tannins optionally in combination with lignite.
591422
Osler Hoskin & Harcourt Llp
Patel Bharat
Phillips Petroleum Company
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