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    • 41. 发明授权
    • Methods of drilling well bores
    • 钻孔井的方法
    • US06460632B1
    • 2002-10-08
    • US10117746
    • 2002-04-05
    • Jiten ChatterjiRoger S. CromwellBobby J. KingFrank ZamoraRonald J. Crook
    • Jiten ChatterjiRoger S. CromwellBobby J. KingFrank ZamoraRonald J. Crook
    • C09K702
    • E21B21/14C09K8/38
    • Improved methods of drilling well bores utilizing foamed aqueous drilling fluids are provided. The methods basically comprise circulating an aqueous drilling fluid containing a single foaming and defoaming surfactant and a gas downwardly through a rotary drill pipe and drill bit connected thereto. Well bore cuttings generated by the drill bit are lifted to the surface by foam produced from the aqueous drilling fluid and gas. Upon reaching the surface, the foamed aqueous drilling fluid is defoamed whereby the cuttings and gas are removed therefrom and the aqueous drilling fluid is combined with additional foaming surfactant when needed and additional gas. The foaming and defoaming of the aqueous drilling fluid are accomplished by changing the pH of the aqueous drilling fluid from basic to acidic which causes the single foaming and defoaming surfactant to foam and defoam the aqueous drilling fluid.
    • 提供了利用泡沫水性钻井液改善钻孔井的方法。 这些方法基本上包括使含有单一发泡和消泡表面活性剂的水性钻井液和气体向下循环通过旋转钻杆和与其连接的钻头。 由钻头产生的井眼切屑由钻井液和气体产生的泡沫提升到表面。 在到达表面时,泡沫含水钻井液被消泡,由此从中除去切屑和气体,并且当需要时将含水钻井液与附加的起泡表面活性剂结合,并且附加气体。 水性钻井液的发泡和消泡是通过将含水钻井液的碱度从碱性变为酸性而实现的,这使单一泡沫和消泡表面活性剂对含水钻井液进行泡沫和消泡。