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    • 10. 发明授权
    • Monovalent cation-containing well fluids
    • 含单价阳离子的井液
    • US07387985B2
    • 2008-06-17
    • US10813314
    • 2004-03-30
    • David P. KippieMorris Arvie, Jr.
    • David P. KippieMorris Arvie, Jr.
    • E21B43/00
    • C09K8/08C09K2208/18Y10S507/903
    • A monovalent cation containing well fluid composed of an aqueous brine containing at least 0.6 equivalents per liter of a water soluble monovalent cation salt, is substantially free of divalent cations, and an amount of a starch derivative selected such that the well fluid has the following characteristics: (a) a low shear rate viscosity greater than about 5,000 centipoise; (b) a high shear rate viscosity at 511 sec−1 in the range from about 15 to about 70 centipoise measured at 120° F. is described. The fluid may be formulated to be substantially free of xanthan gums and preferably has less than 0.25 lb/bbl of xanthan gum.
    • 由含有至少0.6当量/升水溶性一价阳离子盐的含水盐水组成的含有良好流体的单价阳离子基本上不含二价阳离子,并且选择一定量的淀粉衍生物使得该阱流体具有以下特征 :(a)低于约5,000厘泊的低剪切速率粘度; (b)描述了在120°F下测量的在约15至约70厘泊范围内的511秒-1的高剪切速率粘度。 流体可以配制成基本上不含黄原胶,优选具有小于0.25lb / bbl的黄原胶。