Drilling and completion fluid

Details Drilling and completion fluid Drilling and completion fluid

E - Fixed Constructions

21

B

31/32

E21B 43/22 (2006.01) C09K 8/22 (2006.01)

Patent

CA 1296514

Abstract of the Disclosure A drilling mud comprises water, a gelling agent, a defoamer and at least 6% by volume of a glycerine selected from the group consisting of glycerine, polyglycerine and mixtures thereof. The drilling mud is normally prepared by adding to a pre-existing water based mud having therein the gelling agent, caustic soda, lignite and lignosulfonate. A completion fluid comprises water, a defoamer and at least 6% by volume of a glycerine selected from the group consisting of glycerine, polyglycerine and mixtures thereof.

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