Well drilling fluid and method

C - Chemistry – Metallurgy – 09 – K

Patent

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31/22

C09K 8/24 (2006.01) C08L 33/14 (2006.01) C08L 33/24 (2006.01) C08L 39/00 (2006.01) C08L 1/28 (2006.01)

Patent

CA 1332502

A drilling fluid comprising an aqueous medium, a water- soluble cationic polymer, a low molecular weight hydroxyethyl cellulose and a generally water-insoluble weighting agent.

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