C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/508 (2006.01) C09K 8/12 (2006.01) C09K 8/52 (2006.01) E21B 33/13 (2006.01)
Patent
CA 2556367
Well bore servicing fluids are provided that include a thermally activated viscosification compound. Further, methods of servicing a well bore are provided that include displacing such a servicing fluid into the well bore, wherein a viscosity of the servicing fluid increases as it passes down the well bore due to its temperature increasing. Thus, the viscosity of the servicing fluid is effective to suspend solids therein when the servicing fluid is in the well bore. The servicing fluid may be, for example, a cement slung, a drilling fluid, a gravel packing fluid, a fracturing fluid, a completion fluid, or a work-over fluid. In an embodiment, the thermally activated viscosification compound includes at least one water-soluble hydrophobically modified polymer comprising a hydrophobic substituent having from about 1 to about 22 carbon atoms.
L'invention concerne des fluides d'entretien de forage de puits lesquels contiennent un composé de viscosification thermoactivé. L'invention concerne également des procédés d'entretien d'un forage de puits consistant à déplacer ledit fluide d'entretien à l'intérieur du forage du puits, lorsqu'une viscosité du fluide d'entretien augmente à mesure qu'il descend dans le puits du fait de son augmentation de température. Ainsi, la viscosité du fluide d'entretien permet de mettre efficacement en suspension les solides lorsque ledit fluide d'entretien se trouve dans le puits. Le fluide d'entretien peut être, par exemple, un coulis de ciment, un fluide de forage, un fluide de gravillonnage des crépines, un fluide de fracture, un fluide de complétion ou un fluide de reconditionnement. Dans un mode de réalisation, le composé de viscosification thermoactivé contient au moins un polymère hydrosoluble à modification hydrophobe renfermant un substituant hydrophobe ayant environ 1 à environ 22 atomes de carbone.
Koch Ronney R.
Reddy Bairreddy Raghava
Robb Ian D.
Sandy Joe M.
Zamora Frank
Halliburton Energy Services Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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