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    • 72. 发明授权
    • Aphron-containing well drilling and servicing fluids
    • 含Aphron的钻井和维修液
    • US5881826A
    • 1999-03-16
    • US800727
    • 1997-02-13
    • Tommy F. Brookey
    • Tommy F. Brookey
    • C09K8/20C09K8/575E21B21/00C09K7/02
    • E21B21/00C09K8/206C09K8/5758
    • The invention provides a method and fluid for drilling or servicing a well in a subterranean formation containing lost circulation zones or depleted, low pressure reservoirs. A method of decreasing the density of the fluid circulated in a borehole, decreasing the invasion of fluid into formations contacted by the fluid, or decreasing the lost circulation potential of the fluid is provided by using as the fluid an aqueous liquid having dispersed therein a polymer which increases the low shear rate viscosity of the fluid to the extent that the thixotropic index of the fluid is at least about 10 and a surfactant, and wherein the fluid contains aphrons preferably generated by the turbulence and pressure drop as the fluid exits the drill bit in the vicinity of the formation.
    • 本发明提供了一种用于钻井或维护含有流失区或耗尽的低压储层的地层中的井的方法和流体。 通过使用在其中分散有聚合物的水性液体作为流体来提供减少在钻孔中循环的流体密度的方法,减少流体侵入流体接触的结构,或降低流体的流失能力 其将流体的低剪切速率粘度提高到流体的触变指数至少约为10的程度,并且其中当流体离开钻头时,流体包含优选地由湍流和压力下降产生的气泡 在地层附近。