초록 ▼

This invention is of a drilling fluid composition containing a liquid thixotrope, which thixotrope is free of solvents or any other diluent, and is in easily usable, liquid form, pourable at ambient temperatures, and which provides effective and efficient rheological properties when used at low leve

This invention is of a drilling fluid composition containing a liquid thixotrope, which thixotrope is free of solvents or any other diluent, and is in easily usable, liquid form, pourable at ambient temperatures, and which provides effective and efficient rheological properties when used at low levels in such compositions. In a specific aspect, the invention provides an oil or oil invert emulsion drilling fluid composition containing one or more organoclays, and in addition contains a additive which comprises the reaction product of an alkoxylated nitrogen containing compound or a diamine, and one or more polycarboxylic acids in a specified equivalent ratio.

대표청구항 ▼

1. An oil or invert oil based drilling fluid composition comprising:a) an oil or invert oil drilling fluid base formulation containing one or more organoclays and; b) one or more rheological additives which when free of diluent are pourable at ambient temperature comprising the condensation reaction

1. An oil or invert oil based drilling fluid composition comprising:a) an oil or invert oil drilling fluid base formulation containing one or more organoclays and; b) one or more rheological additives which when free of diluent are pourable at ambient temperature comprising the condensation reaction product of: i) one or more polycarboxylic acids; and ii) a chemical selected from the group consisting of one or more liquid alkoxylated nitrogen containing compounds and polyetherdiamines which contain ≥2 active hydrogen groups; wherein the ratio of equivalents of carboxyl acids groups to the equivalents of active hydrogen groups is between 1.05 to 2.10.