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    • 98. 发明授权
    • Process for the cleaning of oil and gas wellbores
    • 油气井清洁工艺
    • US06672388B2
    • 2004-01-06
    • US09880592
    • 2001-06-13
    • William M. McGregorDario FomaraTullio PellizzonGiuseppe Li Bassi
    • William M. McGregorDario FomaraTullio PellizzonGiuseppe Li Bassi
    • E21B3700
    • C09K8/52Y10S507/927Y10S507/929
    • Disclosed is a process for cleaning wellbore walls, tubing or casings. The process is characterized by (a) preparing an aqueous surfactant composition containing from about 10% to 60% by weight of a mixture of surfactants, the mixture comprising from 10% to 50% by weight of an anionic derivative of an alkylpolyglycoside, from 35% to 80% by weight of an alkylpolyglycoside and from 5% to 25% by weight of an anionic derivative of a fatty alcohol, their balance being 100%; (b) diluting the aqueous surfactant composition in water to form a diluted aqueous surfactant composition and injecting the diluted aqueous surfactant composition into a wellbore containing drilling mud, oily residues or other undesirable deposits; (c) extracting from the wellbore the diluted aqueous surfactant composition containing the drilling mud, oily residues or other undesirable deposits; (d) removing the drilling mud, oily residues or other undesirable deposits from the diluted aqueous surfactant composition; and (e) optionally, re-using the diluted aqueous surfactant composition.
    • 公开了一种清洁井筒壁,管道或壳体的方法。 该方法的特征在于(a)制备含水表面活性剂组合物,其含有约10重量%至60重量%的表面活性剂混合物,该混合物包含10重量%至50重量%的烷基多糖苷阴离子衍生物,35 %至80重量%的烷基多糖苷和5重量%至25重量%的脂肪醇的阴离子衍生物,其余量为100%; (b)将水性表面活性剂组合物稀释在水中以形成稀释的水性表面活性剂组合物,并将稀释的含水表面活性剂组合物注入含有钻井泥浆,油性残余物或其它不期望的沉积物的井筒中; (c)从井筒中提取含有钻井泥浆,油性残渣或其它不期望的沉积物的稀释的含水表面活性剂组合物; (d)从稀释的水性表面活性剂组合物中去除钻井泥浆,油性残渣或其它不需要的沉积物; 和(e)任选地,再次使用稀释的水性表面活性剂组合物。