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    Methods and ultra-low density sealing compositions for sealing pipe in well bores
    1.
    发明授权
    Methods and ultra-low density sealing compositions for sealing pipe in well bores 有权
    井筒密封管的方法和超低密度密封组合物

    公开(公告)号：US06367549B1

    公开(公告)日：2002-04-09

    申请号：US09960768

    申请日：2001-09-21

    申请人： Jiten Chatterji ,  Roger S. Cromwell ,  Bobby J. King ,  Dennis W. Gray ,  Ronald J. Crook ,  Frank Zamora

    发明人： Jiten Chatterji ,  Roger S. Cromwell ,  Bobby J. King ,  Dennis W. Gray ,  Ronald J. Crook ,  Frank Zamora

    IPC分类号： E21B3314

    CPC分类号： C04B26/14 ,  C09K8/44 ,  C09K8/46 ,  Y02W30/94 ,  C04B14/08 ,  C04B14/24 ,  C04B18/146 ,  C04B24/42

    摘要： The present invention provides methods and ultra-low density sealing compositions for sealing pipe in well bores penetrating formations which readily fracture at low hydrostatic pressures. A method of the invention basically comprises the steps of providing a hardenable ultra-low density sealing composition comprised of an epoxide containing liquid, a hardening agent, a hardening accelerating agent, a light weight filler and hollow glass michrospheres having a density in the range of from about 5 to 8.5 pounds per gallon, placing the sealing composition in the annulus between the pipe to be sealed and the walls of the well bore and allowing the sealing composition to harden therein.

    摘要翻译： 本发明提供了在低流体静力学压力下容易断裂的井眼穿透地层中密封管道的方法和超低密度密封组合物。 本发明的方法基本上包括以下步骤：提供一种可硬化的超低密度密封组合物，其由含环氧化物的液体，硬化剂，硬化促进剂，轻质填料和中空玻璃多孔体组成，密度范围为 每加仑约5至8.5磅，将密封组合物放置在要密封的管和孔的壁之间的环空中，并允许密封组合物在其中硬化。

    Methods of drilling well bores
    3.
    发明授权
    Methods of drilling well bores 有权
    钻孔井的方法

    公开(公告)号：US06460632B1

    公开(公告)日：2002-10-08

    申请号：US10117746

    申请日：2002-04-05

    申请人： Jiten Chatterji ,  Roger S. Cromwell ,  Bobby J. King ,  Frank Zamora ,  Ronald J. Crook

    发明人： Jiten Chatterji ,  Roger S. Cromwell ,  Bobby J. King ,  Frank Zamora ,  Ronald J. Crook

    IPC分类号： C09K702

    CPC分类号： E21B21/14 ,  C09K8/38

    摘要： 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.

    摘要翻译： 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。