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    Cement compositions comprising aromatic sulfonated polymers and methods of using the same
    1.
    发明授权
    Cement compositions comprising aromatic sulfonated polymers and methods of using the same 有权
    包含芳族磺化聚合物的水泥组合物及其使用方法

    公开(公告)号：US07438758B2

    公开(公告)日：2008-10-21

    申请号：US11780192

    申请日：2007-07-19

    申请人： Ashok K. Santra ,  B. Raghava Reddy ,  Russell M. Fitzgerald

    发明人： Ashok K. Santra ,  B. Raghava Reddy ,  Russell M. Fitzgerald

    IPC分类号： C04B24/20

    CPC分类号： C04B28/02 ,  C04B24/163 ,  C09K8/493

    摘要： A method of servicing a wellbore that penetrates a subterranean formation includes displacing a cement composition comprising an aromatic sulfonated polymer into the wellbore and allowing the cement composition to set. In an embodiment, a transition time of the cement composition is less than or equal to about 60 minutes, alternatively less than or equal to about 50 minutes, less than or equal to about 40 minutes, less than or equal to about 30 minutes, less than or equal to about 20 minutes, or less than or equal to about 10 minutes. Thus, the transition time may be short enough to inhibit a substantial amount of gas migration into the cement composition before it sets. In yet another embodiment, the cement composition exhibits a viscosity that increases from a value of 35 Bc (Bearden units) to about 100 Bc in about 10 minutes or less when the cement composition sets.

    摘要翻译： 维护渗透地下地层的井筒的方法包括将包含芳族磺化聚合物的水泥组合物置于井眼中并使水泥组合物凝固。 在一个实施方案中，水泥组合物的过渡时间小于或等于约60分钟，或者小于或等于约50分钟，小于或等于约40分钟，小于或等于约30分钟，更少 大于或等于约20分钟，或小于或等于约10分钟。 因此，过渡时间可能足够短以在其组合之前抑制大量气体迁移到水泥组合物中。 在另一个实施方案中，当水泥组合物组合时，水泥组合物表现出在大约10分钟或更短时间内从35Bc（Bearden单元）的值增加到约100Bc的粘度。

    Cement compositions comprising aromatic sulfonated polymers and methods of using the same
    2.
    发明授权
    Cement compositions comprising aromatic sulfonated polymers and methods of using the same 有权
    包含芳族磺化聚合物的水泥组合物及其使用方法

    公开(公告)号：US07290613B2

    公开(公告)日：2007-11-06

    申请号：US10966937

    申请日：2004-10-15

    申请人： Ashok K. Santra ,  B. Raghava Reddy ,  Russell M. Fitzgerald

    发明人： Ashok K. Santra ,  B. Raghava Reddy ,  Russell M. Fitzgerald

    IPC分类号： E21B33/138

    CPC分类号： C04B28/02 ,  C04B24/163 ,  C09K8/493

    摘要： A method of servicing a wellbore that penetrates a subterranean formation includes displacing a cement composition comprising an aromatic sulfonated polymer into the wellbore and allowing the cement composition to set. In an embodiment, a transition time of the cement composition is less than or equal to about 60 minutes, alternatively less than or equal to about 50 minutes, less than or equal to about 40 minutes, less than or equal to about 30 minutes, less than or equal to about 20 minutes, or less than or equal to about 10 minutes. Thus, the transition time may be short enough to inhibit a substantial amount of gas migration into the cement composition before it sets. In yet another embodiment, the cement composition exhibits a viscosity that increases from a value of 35 Bc (Bearden units) to about 100 Bc in about 10 minutes or less when the cement composition sets.

    摘要翻译： 维护渗透地下地层的井筒的方法包括将包含芳族磺化聚合物的水泥组合物置于井眼中并使水泥组合物凝固。 在一个实施方案中，水泥组合物的过渡时间小于或等于约60分钟，或者小于或等于约50分钟，小于或等于约40分钟，小于或等于约30分钟，更少 大于或等于约20分钟，或小于或等于约10分钟。 因此，过渡时间可能足够短以在其组合之前抑制大量气体迁移到水泥组合物中。 在另一个实施方案中，当水泥组合物组合时，水泥组合物表现出在大约10分钟或更短时间内从35Bc（Bearden单元）的值增加到约100Bc的粘度。

    Methods of retarding the setting of a cement composition using biodegradable monomers
    5.
    发明授权
    Methods of retarding the setting of a cement composition using biodegradable monomers 有权
    使用可生物降解的单体阻止水泥组合物凝固的方法

    公开(公告)号：US07350574B2

    公开(公告)日：2008-04-01

    申请号：US11158531

    申请日：2005-06-22

    申请人： Ashok K. Santra ,  Russell M. Fitzgerald

    发明人： Ashok K. Santra ,  Russell M. Fitzgerald

    IPC分类号： E21B33/13 ,  E21B33/14

    CPC分类号： C04B24/123 ,  C04B28/02 ,  C04B2103/22 ,  C04B2111/00146 ,  C09K8/467 ,  C04B24/18 ,  C04B24/003 ,  C04B22/0013 ,  C04B24/06 ,  C04B24/26

    摘要： Methods of retarding the setting of a cement composition comprise including one or more secondary amines substituted with a carboxyl group or salts thereof (e.g., 3-hydroxy N,N′-iminodisuccinic acid) in the cement composition. The inclusion of such materials in cement compositions may be highly beneficial. In wellbores having BHCT's of less than or equal to about 250° F., the use of the secondary amine as the set retarder ensures that the thickening time of the cement composition is sufficient to allow the cement composition to be pumped to its desired downhole location. Further, the secondary amine may be used in combination with conventional set retarders to enhance the ability of those retarders to increase the thickening time of the cement composition at higher BHCT's, e.g., from about 250° F. to about 525° F.

    摘要翻译： 阻止水泥组合物凝固的方法包括在水泥组合物中包括一个或多个被羧基取代的仲胺或其盐（例如3-羟基N，N'-亚氨基二琥珀酸）。 将这些材料包含在水泥组合物中可能是非常有益的。 在具有小于或等于约250°F的BHCT的孔筒中，使用仲胺作为凝结缓凝剂确保了水泥组合物的增稠时间足以使水泥组合物被泵送到其所需的井下位置 。 此外，仲胺可以与常规固化缓凝剂组合使用，以增强这些缓凝剂在较高BHCT下例如约250°F至约525°F时增加水泥组合物的增稠时间的能力。

    Cement compositions comprising biodegradable monomers for retarding the setting thereof
    6.
    发明授权
    Cement compositions comprising biodegradable monomers for retarding the setting thereof 有权
    包含用于延缓其凝固的可生物降解的单体的水泥组合物

    公开(公告)号：US07537656B2

    公开(公告)日：2009-05-26

    申请号：US11158693

    申请日：2005-06-22

    申请人： Ashok K. Santra ,  Russell M. Fitzgerald

    发明人： Ashok K. Santra ,  Russell M. Fitzgerald

    IPC分类号： C04B24/04 ,  C04B24/12

    CPC分类号： C04B28/02 ,  C04B24/123 ,  C04B2103/0072 ,  C04B2103/0074 ,  C04B2111/00146 ,  C09K8/467 ,  C04B2103/22 ,  C04B22/0013 ,  C04B24/003 ,  C04B24/06 ,  C04B24/161 ,  C04B24/18

    摘要： Cement compositions may comprise one or more secondary amines substituted with a carboxyl group or salts thereof (e.g., 3-hydroxy N,N′-iminodisuccinic acid) for retarding the setting of such compositions. The inclusion of such materials in cement compositions may be highly beneficial. In wellbores having BHCT's of less than or equal to about 250° F., the use of the secondary amine as the set retarder ensures that the thickening time of the cement composition is sufficient to allow the cement composition to be pumped to its desired downhole location. Further, the secondary amine may be used in combination with conventional set retarders to enhance the ability of those retarders to increase the thickening time of the cement composition at higher BHCT's, e.g., from about 250° F. to about 525° F.

    摘要翻译： 水泥组合物可以包含一个或多个被羧基取代的仲胺或其盐（例如3-羟基N，N'-亚氨基二琥珀酸），用于延缓这种组合物的固化。 将这些材料包含在水泥组合物中可能是非常有益的。 在具有小于或等于约250°F的BHCT的孔筒中，使用仲胺作为凝结缓凝剂确保了水泥组合物的增稠时间足以使水泥组合物被泵送到其所需的井下位置 。 此外，仲胺可以与常规固化缓凝剂组合使用，以增强这些缓凝剂在较高BHCT下例如约250°F至约525°F时增加水泥组合物的增稠时间的能力。

    Methods of increasing the thickening times of phosphate-based cementitious compositions in high-temperature wellbores
    8.
    发明授权
    Methods of increasing the thickening times of phosphate-based cementitious compositions in high-temperature wellbores 有权
    增加磷酸盐基水泥组合物在高温井筒中的增稠时间的方法

    公开(公告)号：US07527098B2

    公开(公告)日：2009-05-05

    申请号：US10855202

    申请日：2004-05-27

    申请人： Ashok K. Santra ,  Russell M. Fitzgerald

    发明人： Ashok K. Santra ,  Russell M. Fitzgerald

    IPC分类号： E21B33/13

    CPC分类号： C04B28/342 ,  C09K8/42 ,  Y10S106/01 ,  C04B14/06 ,  C04B14/28 ,  C04B14/303 ,  C04B14/304 ,  C04B14/308 ,  C04B22/0013 ,  C04B22/06 ,  C04B24/10

    摘要： A wellbore may be cemented by preparing a cementitious composition comprising water, a metal oxide or hydroxide compound, a phosphate compound, a borate compound, and a sugar, followed by displacing the cementitious composition into the wellbore. The metal oxide or hydroxide compound reacts with the phosphate compound in the wellbore to set into a hard mass. The synergistic effect of the borate compound and the sugar may increase a thickening time of the cementitious composition to in a range of from about 2 hours to about 11 hours at ambient temperatures in the wellbore. As such, the thickening time is sufficient to allow the cementitious composition to be placed in its desired location in the wellbore before setting.

    摘要翻译： 可以通过制备包含水，金属氧化物或氢氧化物，磷酸盐化合物，硼酸盐化合物和糖的水泥组合物，随后将水泥质组合物置换到井筒中来将井筒粘结。 金属氧化物或氢氧化物与井眼中的磷酸盐化合物反应，形成硬质块。 硼酸盐化合物和糖的协同作用可能使水泥组合物的增稠时间在井筒中的环境温度下在约2小时至约11小时的范围内。 因此，增稠时间足以允许水泥组合物在凝固之前放置在井眼中的所需位置。