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Title: Drilling fluid thinner

A drilling fluid additive is described comprising a mixture of: (a) a sulfoalkylated tannin and (b) chromium acetate selected from the group consisting of chromium (III) acetate and chromium (II) acetate, wherein the chromium acetate is present in a weight ratio of the chromium acetate to the sulfoalkylated tannin in the range of from about 1:20 to about 1:1.
Authors:
Publication Date:
OSTI Identifier:
5536226
Report Number(s):
US 4842770
Resource Type:
Patent
Resource Relation:
Patent File Date: 2 Mar 1988
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; DRILLING FLUIDS; CHEMICAL COMPOSITION; ACETATES; ADDITIVES; CHROMIUM COMPOUNDS; QUANTITY RATIO; TANNIC ACID; AROMATICS; CARBOXYLIC ACID SALTS; CARBOXYLIC ACIDS; FLUIDS; HYDROXY COMPOUNDS; ORGANIC ACIDS; ORGANIC COMPOUNDS; PHENOLS; POLYPHENOLS; TRANSITION ELEMENT COMPOUNDS 020300* -- Petroleum-- Drilling & Production; 030300 -- Natural Gas-- Drilling, Production, & Processing