C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/32 (2006.01)
Patent
CA 2359846
Aphron-containing oil based well drilling and servicing fluids are disclosed which seal microfractutres and the like during drilling and well servicing operations, thus decreasing the volume of fluid lost to the formations contacted by the fluids. The fluids comprise an oleaginous liquid as the continuous phase, a viscosifier which imparts a low shear rate viscosity to the fluids of at least 10,000 centipoise, an aphron-generating surfactant, and aphrons. The fluids are used in a conventional method of drilling an oil and/or gas well or in conventional methods of servicing or treating such wells, such as in completion, workover, sand control, and frac pack operations, and as spotting fluids to released stuck pipes or tools in a wellbore.
L'invention concerne le forage de puits et les fluides d'entretien à base d'huile contenant des aphrons; lesdits fluides colmatent les microfractrures (et analogues) pendant les opérations de forage et d'entretien du puits, ce qui permet ainsi de diminuer le volume de fluide perdu dans les formations en contact avec lesdits fluides. Ces derniers contiennent un liquide oléagineux en tant que phase continue, un améliorant de viscosité qui transmet une viscosité à faible vitesse de cisaillement aux fluides d'au moins 10 000 centipoises, un tensioactif générant des aphrons, et des aphrons. Les fluides sont utilisés dans un procédé classique de forage d'un puits de pétrole et/ou de gaz, ou dans des procédés classiques d'entretien ou de traitement de ce genre de puits, tel que les opérations de complétion, de reconditionnement, d'élimination du sable, et de fracturation; et en tant que fluides pour spotting servant à dégager des outils ou des tuyaux coincés dans le puits de forage.
Brookey Tommy F.
Cowan Jack C.
Masi Technologies L.l.c.
Ridout & Maybee Llp
LandOfFree
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