C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/12 (2006.01) C09K 8/524 (2006.01) E21B 37/06 (2006.01)
Patent
CA 2508339
The present invention relates to an aqueous drilling fluid used for drilling bitumen or heavy oil rich formations. The aqueous drilling fluid comprising; a water soluble cationic polymer capable of encapsulating the bitumen or heavy oil. The encapsulation of bitumen prevents the accretion of bitumen to drill components.
L'invention concerne un fluide de forage aqueux utilisé pour forer dans des formations de bitume ou riches en huiles lourdes. Le fluide de forage aqueux comprend un polymère cationique hydrosoluble capable d'encapsuler le bitume ou l'huile lourde. L'encapsulation du bitume empêche l'accrétion du bitume avec les composants de forage.
Ewanek John
Levey Simon J. M.
Blake Cassels & Graydon Llp
Genesis International Oilfield Services Inc.
New West Drilling Fluids Inc.
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