Glycol solution drilling system

Details Glycol solution drilling system Glycol solution drilling system

C - Chemistry, Metallurgy

09

K

C09K 8/08 (2006.01)

Patent

CA 2252161

The invention provides water base well drilling and servicing fluids containing a biopolymer viscosifier and a water soluble polyalkylene glycol shale stabilizing additive therein having enhanced thermal stability, as indicated by the low shear rate viscosity at 0.06 sec-1, the enhanced thermal stability being provided by an amorphous silica viscosifier therein. A method of enhancing the thermal stability of aqueous base well drilling and servicing fluids containing a biopolymer viscosifier and a water soluble polyalkylene glycol shale stabilizing additive therein is disclosed which comprises adding to the fluid an amorphous silica viscosifier.

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