Drilling fluid concentrates

Details Drilling fluid concentrates Drilling fluid concentrates

E - Fixed Constructions

21

B

E21B 10/60 (2006.01) B01F 17/00 (2006.01) C09K 8/04 (2006.01) C09K 8/24 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2247719

A pourable concentrate suitable for forming structured surfactant drilling muds on dilution with aqueous electrolyte comprises:- a) from 30 to 80% by weight, based on the weight of the composition, of surfactant consisting of at least 25%, based on the weight of the surfactant, of an anionic surfactant, from 0 to 70% by weight, based on the total weight of surfactant, of an alkanolamide, and from 0 to 20% based on the total weight of surfactant, of other non-ionic surfactant and/or amphoteric surfactants; b) from 3 to 60% by weight of the composition of a compound of the formula RHX where R is hydrogen or a C1-6 alkyl group and X is a random or block copolymeric chain comprising a total of from 3 to 20 ethoxy and propoxy units in a relative numerical proportion of 0 to 10:1; and c) up to 65% by weight of water.

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