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 8/04 (2006.01) C09K 8/03 (2006.01) C09K 8/52 (2006.01) E21B 37/06 (2006.01)

Patent

CA 2437522

Fluids and methods 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 limits the adherence of heavy oil and heavy oil laden drill cuttings to drill pipe strings and well bore casings.

Liquides et procédés utiles pour les opérations de forage d'un puits de pétrole. Les liquides comprennent des additifs standards d'amélioration de l'indice de viscosité et de réduction de perte de fluide ainsi que des phosphonates ou des esters phosphoriques de ligands organiques. L'ajout de phosphonates ou d'esters phosphoriques à des concentrations efficaces limite l'adhérence du pétrole lourd et des déblais de forage chargés de pétrole lourd aux trains de tiges et aux tubages de puits.

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