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1. 发明授权

US07543642B2 Cement compositions containing flexible, compressible beads and methods of cementing in subterranean formations 有权
标题翻译：含有柔性可压缩珠粒的水泥组合物和在地层中固井的方法
公开(公告)号：US07543642B2
公开(公告)日：2009-06-09
申请号：US10350533
申请日：2003-01-24
申请人： B. Raghava Reddy , Krishna M. Ravi , Michael J. Szymanski
发明人： B. Raghava Reddy , Krishna M. Ravi , Michael J. Szymanski
IPC分类号： E21B33/13
CPC分类号： C04B20/04 , C04B20/0032 , C04B28/02 , C09K8/42 , C09K8/46 , C09K8/473 , Y02W30/94 , C04B16/08 , C04B14/104 , C04B16/082 , C04B18/146 , C04B22/124 , C04B2103/20 , C04B2103/48 , C04B2103/50 , C04B24/2688 , C04B24/2641
摘要： Cement compositions comprising flexible, compressible beads, processes for preparing such cement compositions, and methods of cementing in subterranean formations using such cement compositions. One or more flexible, compressible beads are mixed with the cement before pumping the cement into a well bore. The flexible, compressible beads are preferably composed of an elastomeric material such as a copolymer of methylmethacrylate and acrylonitrile; a terpolymer of methylmethacrylate, acrylonitrile, and dichloroethane; a styrene-divinylbenzene copolymer; and polystyrene. The flexible, compressible beads may be heated to expand the beads before mixing with the cement such that the ensuing cement composition will have a desired density. Non-flexible beads such as spherulites may also be added to the cement compositions.
摘要翻译：包含柔性可压缩珠粒的水泥组合物，用于制备这种水泥组合物的方法，以及使用这种水泥组合物在地下地层中固井的方法。在将水泥泵入井眼之前，将一个或多个柔性可压缩的珠与水泥混合。柔性可压缩珠粒优选由弹性材料如甲基丙烯酸甲酯和丙烯腈的共聚物组成; 甲基丙烯酸甲酯，丙烯腈和二氯乙烷的三元共聚物; 苯乙烯 - 二乙烯基苯共聚物; 和聚苯乙烯。在与水泥混合之前，可以加热柔性可压缩珠粒以使珠粒膨胀，使得随后的水泥组合物具有所需的密度。也可以将非柔性珠如球晶添加到水泥组合物中。

2. 发明授权

US07482309B2 Methods of drilling wellbores using variable density fluids comprising coated elastic particles 有权
标题翻译：使用包含涂层弹性颗粒的可变密度流体钻井孔的方法
公开(公告)号：US07482309B2
公开(公告)日：2009-01-27
申请号：US10721055
申请日：2003-11-24
申请人： Krishna M. Ravi , Donald L. Whitfill , B. Raghava Reddy
发明人： Krishna M. Ravi , Donald L. Whitfill , B. Raghava Reddy
IPC分类号： E21B21/00 , C09K8/24 , B01F3/12
CPC分类号： C09K8/03 , C09K8/536 , C09K8/70 , C09K8/92
摘要： The present invention provides variable density fluid compositions and methods for using such compositions in a subterranean formation. One exemplary embodiment of the variable density fluid compositions of the present invention comprises a variable density fluid comprising: a base fluid; and a portion of elastic particles, the elastic particles having an isothermal compressibility factor in the range of from about 1.5×10−3 (1/psi) to about 1.5×10−9 (1/psi).
摘要翻译：本发明提供了可变密度流体组合物和在地下地层中使用这种组合物的方法。本发明的可变密度流体组合物的一个示例性实施方案包括可变密度流体，其包含：基础流体; 和一部分弹性颗粒，弹性颗粒具有在约1.5×10 -3（1 / psi）至约1.5×10 -9（1 / psi）范围内的等温可压缩因子。

3. 发明授权

US07156175B2 Methods of generating gas in well fluids 有权
标题翻译：在井液中产生气体的方法
公开(公告)号：US07156175B2
公开(公告)日：2007-01-02
申请号：US10789712
申请日：2004-02-27
申请人： B. Raghava Reddy , Krishna M. Ravi , James E. Griffith , Frank Zamora , Karen Luke , John L. Dennis, Jr. , Ricky A. Cox
发明人： B. Raghava Reddy , Krishna M. Ravi , James E. Griffith , Frank Zamora , Karen Luke , John L. Dennis, Jr. , Ricky A. Cox
IPC分类号： E21B43/22 , E21B43/27
CPC分类号： C09K8/38
摘要： The present invention relates to methods of chemically generating gas in aqueous fluids utilized in the drilling and completion of wells such as drilling fluids, spacer fluids, and aqueous acid solutions. In one embodiment, the invention provides a method of preventing the formation of fractures in a subterranean formation during a drilling operation. In other embodiments, the present invention provides methods of separating a first fluid and a second fluid in a subterranean formation; methods of forming lightweight well treatment fluids; methods of enhancing the permeability of a subterranean zone; lightweight drilling fluids; lightweight spacer fluids; foamed aqueous acidic well treatment fluids; and methods of making foamed aqueous and aqueous acidic well treatment fluids.
摘要翻译：本发明涉及在钻井液，间隔液和含水酸溶液的钻井和完井中使用的含水流体中化学产生气体的方法。在一个实施例中，本发明提供了一种在钻井操作期间防止在地层中形成裂缝的方法。在其它实施例中，本发明提供了分离地下地层中的第一流体和第二流体的方法; 形成轻型井处理液的方法; 提高地下区域渗透性的方法; 轻型钻井液; 轻质间隔液; 发泡水性酸性处理液; 以及制造发泡的含水和酸性水溶液的处理流体的方法。

4. 发明授权

US07143828B2 Emulsion admixtures for improving cement elasticity 有权
标题翻译：用于改善水泥弹性的乳液混合物
公开(公告)号：US07143828B2
公开(公告)日：2006-12-05
申请号：US10767672
申请日：2004-01-29
申请人： B. Raghava Reddy , Krishna M. Ravi
发明人： B. Raghava Reddy , Krishna M. Ravi
IPC分类号： E21B33/138
CPC分类号： C04B24/2688 , C04B24/2641 , C04B24/2652 , C04B28/02 , C09K8/467 , Y02W30/94 , C04B18/146 , C04B2103/40 , C04B2103/50
摘要： Methods and cement compositions for sealing a subterranean zone penetrated by a wellbore. The cement compositions include cementitious material, a polymer emulsion and a mixing fluid. The polymer emulsion includes at least one polar monomer and at least one elasticity enhancing monomer.
摘要翻译：用于密封井眼穿透的地下区域的方法和水泥组合物。水泥组合物包括水泥质材料，聚合物乳液和混合流体。聚合物乳液包括至少一种极性单体和至少一种弹性增强单体。

5. 发明授权

US07749942B2 Variable density fluids and methods of use in subterranean formations 有权
标题翻译：可变密度流体和地下地层中使用的方法
公开(公告)号：US07749942B2
公开(公告)日：2010-07-06
申请号：US12165760
申请日：2008-07-01
申请人： Krishna M. Ravi , Donald L. Whitfill , B. Raghava Reddy , Mike Szymanski
发明人： Krishna M. Ravi , Donald L. Whitfill , B. Raghava Reddy , Mike Szymanski
IPC分类号： C09K8/24 , E21B21/00
CPC分类号： C09K8/03 , C09K8/035 , C09K8/40 , C09K8/467 , C09K8/508 , C09K8/516 , C09K8/536 , C09K8/68 , C09K8/70 , C09K8/74 , C09K8/88 , C09K8/92
摘要： Herein provided are variable density fluid compositions and methods for using such compositions in a subterranean formation. One exemplary embodiment of the variable density fluid compositions of the present invention comprises a variable density fluid comprising: a base fluid; and a portion of elastic particles, the elastic particles having an isothermal compressibility factor in the range of from about 1.5×10−3 (1/psi) to about 1.5×10−9 (1/psi). Also provided are cement compositions comprising elastic particles, processes for preparing such cement compositions, and methods of cementing in subterranean formations using such cement compositions. One or more elastic particles are mixed with the cement before pumping the cement into a well bore. The elastic particles are preferably composed of an elastomeric material such as a copolymer of methylmethacrylate and acrylonitrile; a terpolymer of methylmethacrylate, acrylonitrile, and dichloroethane; a styrene-divinylbenzene copolymer; and polystyrene.
摘要翻译：本文提供的是可变密度流体组合物和在地下地层中使用这种组合物的方法。本发明的可变密度流体组合物的一个示例性实施方案包括可变密度流体，其包含：基础流体; 和一部分弹性颗粒，弹性颗粒的等温压缩系数在约1.5×10-3（1 / psi）至约1.5×10-9（1 / psi）的范围内。还提供了包含弹性颗粒的水泥组合物，用于制备这种水泥组合物的方法，以及使用这种水泥组合物在地下地层中固井的方法。在将水泥泵入井眼之前，将一种或多种弹性颗粒与水泥混合。弹性颗粒优选由弹性体材料构成，例如甲基丙烯酸甲酯和丙烯腈的共聚物; 甲基丙烯酸甲酯，丙烯腈和二氯乙烷的三元共聚物; 苯乙烯 - 二乙烯基苯共聚物; 和聚苯乙烯。

6. 发明授权

US07650940B2 Cement compositions comprising particulate carboxylated elastomers and associated methods 有权
公开(公告)号：US07650940B2
公开(公告)日：2010-01-26
申请号：US11321113
申请日：2005-12-29
申请人： B. Raghava Reddy , Krishna M Ravi
发明人： B. Raghava Reddy , Krishna M Ravi
IPC分类号： E21B33/13 , E21B33/14
CPC分类号： C04B16/04 , C04B24/2611 , C04B24/2641 , C04B24/2652 , C04B28/02 , C04B2103/0052 , C04B2103/0058 , C04B2111/2038 , C04B2111/34 , C09K8/467 , C04B20/1033
摘要： Methods of cementing comprising: providing a cement composition comprising water, a cement, and a particulate elastomer comprising a carboxy group; and allowing the cement composition to set. Cement compositions comprising water, a cement, and a particulate elastomer comprising a carboxy group.

7. 发明授权

US07424914B2 Cement compositions comprising high aspect ratio materials and methods of use in subterranean formations 失效
标题翻译：包含高纵横比材料的水泥组合物和在地下地层中使用的方法
公开(公告)号：US07424914B2
公开(公告)日：2008-09-16
申请号：US11595147
申请日：2006-11-09
申请人： B. Raghava Reddy , Gunnar Lende , Krishna M. Ravi
发明人： B. Raghava Reddy , Gunnar Lende , Krishna M. Ravi
IPC分类号： E21B33/13
CPC分类号： F02D9/109 , F02B31/085 , F02M26/22 , F02M26/53 , F02M26/54 , F02M35/10222 , F02M35/112 , Y02T10/146
摘要： Cement compositions that include high aspect ratio materials, and methods for using such cement compositions in subterranean formations are provided herein. An example of a method is a method of cementing in a subterranean formation. An example of a composition is a cement composition for use in a subterranean formation.
摘要翻译：本文提供了包括高纵横比材料的水泥组合物，以及在地下地层中使用这种水泥组合物的方法。方法的一个实例是在地层中固井的方法。组合物的实例是用于地下地层的水泥组合物。

8. 发明授权

US07138446B2 Elastomeric admixtures for improving cement elasticity 有权
公开(公告)号：US07138446B2
公开(公告)日：2006-11-21
申请号：US10825976
申请日：2004-04-16
申请人： B. Raghava Reddy , Krishna M. Ravi
发明人： B. Raghava Reddy , Krishna M. Ravi
IPC分类号： C04B28/02
CPC分类号： C04B24/2652 , C04B28/02 , C09K8/46 , C04B14/062
摘要： A method and cementing composition for sealing a subterranean zone penetrated by a well bore, wherein the cementing composition comprises a mixture of cementitious material, acrylonitrile butadiene styrene (ABS), and sufficient water to form a slurry.

9. 发明授权

US06992048B2 Methods of generating gas in well treating fluids 失效
标题翻译：井处理液中产生气体的方法
公开(公告)号：US06992048B2
公开(公告)日：2006-01-31
申请号：US10792999
申请日：2004-03-04
申请人： B. Raghava Reddy , Krishna M. Ravi , Karen Luke , Rickey L. Morgan
发明人： B. Raghava Reddy , Krishna M. Ravi , Karen Luke , Rickey L. Morgan
IPC分类号： C09K3/00
CPC分类号： C04B20/12 , C04B28/02 , C04B28/04 , C04B38/02 , C04B40/0633 , C04B2103/0067 , C09K8/46 , C09K8/473 , C09K8/516 , C09K8/518 , C09K8/703 , Y10S507/902 , C04B2103/42 , C04B20/10 , C04B20/1029 , C04B24/12 , C04B24/129 , C04B2103/0095 , C04B22/002 , C04B22/06 , C04B22/068 , C04B24/383 , C04B2103/48 , C04B2103/445 , C04B14/042 , C04B14/047 , C04B14/06 , C04B14/08 , C04B14/10 , C04B14/301 , C04B20/1025 , C04B20/1037 , C04B20/123 , C04B2103/10 , C04B20/1033
摘要： The present invention relates to methods of generating gas in and foaming well treating fluids during pumping of the treating fluids or after the treating fluids are placed in a subterranean zone, or both. A method of the present invention provides a method of making a foamed well fluid that comprises a gas comprising the steps of combining an aqueous fluid, a surfactant, an encapsulated activator, and a gas generating chemical, the gas generating chemical being present in an amount in the range of from about 0.1% to 100% of a water component in the aqueous well fluid; and allowing the gas generating chemical and the encapsulated activator to react so that gas is generated in the aqueous fluid to form a foamed well fluid. Methods of cementing, fracturing, cementing compositions, fracturing fluid compositions, and foamed well fluid compositions also are provided.
摘要翻译：本发明涉及在泵送处理流体期间或在将处理流体放置在地下区域中之后或在两者之间产生气体并在其中良好地处理流体的方法。本发明的方法提供了一种制造发泡井液的方法，该方法包括一种气体，包括以下步骤：将含水流体，表面活性剂，包封的活化剂和产生气体的化学物质混合，所述气体发生化学物质的量以在水井液中约0.1％至100％的水组分的范围内; 并且允许气体发生化学物质和包封的活化剂反应，使得在含水流体中产生气体以形成发泡井液。还提供了固井，压裂，固井组合物，压裂液组合物和发泡井液组合物的方法。

10. 发明授权

US06722434B2 Methods of generating gas in well treating fluids 有权
标题翻译：井处理液中产生气体的方法
公开(公告)号：US06722434B2
公开(公告)日：2004-04-20
申请号：US10159588
申请日：2002-05-31
申请人： B. Raghava Reddy , Krishna M. Ravi , Karen Luke , Rickey L. Morgan
发明人： B. Raghava Reddy , Krishna M. Ravi , Karen Luke , Rickey L. Morgan
IPC分类号： E21B4322
CPC分类号： C04B20/12 , C04B28/02 , C04B28/04 , C04B38/02 , C04B40/0633 , C04B2103/0067 , C09K8/46 , C09K8/473 , C09K8/516 , C09K8/518 , C09K8/703 , Y10S507/902 , C04B2103/42 , C04B20/10 , C04B20/1029 , C04B24/12 , C04B24/129 , C04B2103/0095 , C04B22/002 , C04B22/06 , C04B22/068 , C04B24/383 , C04B2103/48 , C04B2103/445 , C04B14/042 , C04B14/047 , C04B14/06 , C04B14/08 , C04B14/10 , C04B14/301 , C04B20/1025 , C04B20/1037 , C04B20/123 , C04B2103/10 , C04B20/1033
摘要： Improved methods of generating gas in and foaming well treating fluids introduced into a subterranean zone are provided. A method of the invention includes the steps of combining one or more gas generating chemicals with the well treating fluid and combining one or more delayed encapsulated activators having selected release times with the well treating fluid containing the gas generating chemicals so that the gas generating chemicals react with the delayed encapsulated oxidizing agent activators and gas and foam are formed in the treating fluid while the treating fluid is being pumped and after being placed in the subterranean zone.
摘要翻译：提供了改进的引入井下区域的产生气体和发泡好的处理流体的方法。本发明的方法包括以下步骤：将一种或多种产生气体的化学品与井处理流体组合，并将具有选定释放时间的一种或多种延迟封装的活化剂与含有产生气体的化学物质的井处理流体混合，使气体产生化学物质反应在处理流体被泵送并且被放置在地下区域之后，在处理流体中形成延迟的包封氧化剂活化剂和气体和泡沫。

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