Drilling fluids, drilling fluids additives and methods...

Details Drilling fluids, drilling fluids additives and methods... Drilling fluids, drilling fluids additives and methods...

C - Chemistry, Metallurgy

09

K

C09K 8/035 (2006.01) C09K 8/04 (2006.01) C09K 8/524 (2006.01) E21B 21/00 (2006.01)

Patent

CA 2437061

Fluids useful in oil well drilling operations are described. The fluids comprise standard viscosifying and fluid loss control additives along with phosphonates or phosphate esters of organic ligands. The addition of the phosphonates or phosphate esters at effective concentrations prevents the adherence of heavy oil and heavy oil laden drill cuttings to drill pipe strings and well bore casings.

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