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    Wellbore cementing compositions and methods of making and using same
    1.
    发明申请
    Wellbore cementing compositions and methods of making and using same 失效
    井筒固井组合物及其制备和使用方法

    公开(公告)号：US20120090841A1

    公开(公告)日：2012-04-19

    申请号：US12907209

    申请日：2010-10-19

    申请人： B. Raghava REDDY ,  Rahul Chandrakant PATIL ,  Sandip PATIL

    发明人： B. Raghava REDDY ,  Rahul Chandrakant PATIL ,  Sandip PATIL

    IPC分类号： E21B33/13 ,  C04B16/02

    CPC分类号： C09K8/467 ,  C04B24/38 ,  C04B24/383 ,  C04B28/02 ,  C09K8/487 ,  C04B20/023 ,  C04B20/04

    摘要： A method of cementing a wellbore comprising preparing a wellbore cementing composition comprising a cementitious materials and a modified biopolymer additive wherein the modified biopolymer additive is the reaction product of a process comprising contacting a biopolymer and an organic carbonate to form a reaction mixture and subjecting the reaction mixture to a temperature of from about 100° F. to about 250° F. and placing the wellbore cementing fluid in the wellbore. A method of cementing a wellbore comprising contacting a modified biopolymer additive with a cementitious slurry to produce a wellbore cementing composition having an initial viscosity, v0; placing the wellbore cementing composition to a desired depth in a subterranean formation wherein the wellbore cementing composition has a transitional viscosity, vt, during placement in the subterranean formation and a final viscosity, vf, at the desired depth wherein vf≧vt>v0; and allowing the wellbore cementing composition to set.

    摘要翻译： 一种固井井的方法，包括制备包含水泥质材料和改性生物聚合物添加剂的井眼胶结组合物，其中改性生物聚合物添加剂是包括使生物聚合物和有机碳酸酯接触以形成反应混合物并使反应 混合物至约100°F至约250°F的温度，并将井眼固井液置于井筒中。 一种固井井的方法，包括使改性的生物聚合物添加剂与水泥浆料接触以产生具有初始粘度v0的井眼胶结组合物; 将井眼胶结剂组合物放置在地下地层中所需的深度，其中井眼胶结剂组合物在放置在地层中时具有过渡粘度vt，并且在期望深度处具有最终粘度vf，其中vf≥vt> v0; 并允许井筒固井组合物固化。

    METHODS FOR CEMENTING IN A SUBTERRANEAN FORMATION USING A CEMENT COMPOSITION CONTAINING CALCIUM SILICATE HYDRATE SEEDS
    4.
    发明申请
    METHODS FOR CEMENTING IN A SUBTERRANEAN FORMATION USING A CEMENT COMPOSITION CONTAINING CALCIUM SILICATE HYDRATE SEEDS 有权
    使用含有硅酸钙水泥种子的水泥组合物形成地下水的方法

    公开(公告)号：US20120152540A1

    公开(公告)日：2012-06-21

    申请号：US13181303

    申请日：2011-07-12

    申请人： Rahul Chandrakant PATIL ,  Trissa JOSEPH ,  Abhimanyu DESHPANDE ,  Vineet SATHE

    发明人： Rahul Chandrakant PATIL ,  Trissa JOSEPH ,  Abhimanyu DESHPANDE ,  Vineet SATHE

    IPC分类号： E21B33/13

    CPC分类号： C09K8/467 ,  C04B22/0086 ,  C04B28/02 ,  C04B28/188 ,  C04B2103/10 ,  C04B24/2611 ,  C04B14/043 ,  C04B7/02 ,  C04B24/2676

    摘要： According to an embodiment, a method of cementing in a subterranean formation comprises: introducing a cement composition into the subterranean formation, wherein the cement composition comprises: cement; water; and calcium silicate hydrate (C—S—H) seeds, wherein a test cement composition consisting essentially of: the cement; the water; and the C—S—H seeds, and in the same proportions as in the cement composition, develops a compressive strength of at least 1,200 psi (8.3 MPa) when tested at 24 hours, a temperature of 60° F. (15.6° C.), and a pressure of 3,000 psi (20.7 MPa); and allowing the cement composition to set. According to another embodiment, the C—S—H seeds are mesoscopic particles, nanoparticles, or combinations thereof, and wherein the C—S—H seeds are in a concentration in the range of about 1% to about 5% by weight of the cement.

    摘要翻译： 根据一个实施方案，一种在地层中固井的方法包括：将水泥组合物引入所述地下地层，其中所述水泥组合物包括：水泥; 水; 和硅酸钙水合物（C-S-H）种子，其中测试水泥组合物基本上由以下组成：水泥; 水; 和C-S-H种子，并且以与水泥组合物相同的比例，在24小时，温度为60°F（15.6℃）下测试时，形成至少1200psi（8.3MPa）的抗压强度 ）和3,000psi（20.7MPa）的压力; 并允许水泥组合物固化。 根据另一个实施方案，C-S-H种子是介观颗粒，纳米颗粒或其组合，并且其中所述C-S-H种子的浓度范围为所述C-S-H种子重量的约1％至约5％ 水泥。