Drilling fluid

Details Drilling fluid Drilling fluid

C - Chemistry, Metallurgy

09

K

C09K 8/22 (2006.01)

Patent

CA 2058856

A water based drilling fluid comprises: (a) an aqueous medium, (b) a polyalkylene glycol of general formula: Image wherein R is H or CH3, R1 is H or an alkyl group containing 1 to 4 carbon atoms, and n is a number in the range 4 to 200, and (c) a potassium salt. In the case of tetra- and higher molecular weight polyalkylene glycols, there is a synergistic clay-stablising effect between these compounds and the potassium salt.

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