Aqueous drilling and packer fluids

Details Aqueous drilling and packer fluids Aqueous drilling and packer fluids

C - Chemistry, Metallurgy

09

K

31/19

C09K 8/24 (2006.01) C09K 8/20 (2006.01)

Patent

CA 1170445

A B S T R A C T Aqueous, clay-containing drilling fluids and packer fluids are modified for reduction of viscosity and gel strength upon addition of water soluble lignosulfonates and particular low molecular weight acrylic copolymers. Enhanced reduction of viscosity and gel strength may be obtained by also adding an ethoxylated phenol surfactant.

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