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1. 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。

2. 发明申请

US20090038855A1 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的使用方法
公开(公告)号：US20090038855A1
公开(公告)日：2009-02-12
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： C09K8/02 , E21B43/22
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。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。

3. 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。

4. 发明申请

US20090137431A1 Oilwell sealant compositions comprising alkali swellable latex 失效
公开(公告)号：US20090137431A1
公开(公告)日：2009-05-28
申请号：US12357335
申请日：2009-01-21
申请人： B. Raghava Reddy , Mark R. Savery , Krishna M. Ravi , Donald L. Whitfill
发明人： B. Raghava Reddy , Mark R. Savery , Krishna M. Ravi , Donald L. Whitfill
IPC分类号： C09K8/00
CPC分类号： C09K8/5045 , C09K8/506 , C09K8/508
摘要： Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.

5. 发明授权

US07284611B2 Methods and compositions for controlling lost circulation in subterranean operations 有权
标题翻译：控制地下作业中流失的方法和组成
公开(公告)号：US07284611B2
公开(公告)日：2007-10-23
申请号：US10982016
申请日：2004-11-05
申请人： B. Raghava Reddy , Donald L. Whitfill , Krishna M. Ravi , Mark R. Savery
发明人： B. Raghava Reddy , Donald L. Whitfill , Krishna M. Ravi , Mark R. Savery
IPC分类号： E21B33/138 , E21B21/00
CPC分类号： C09K8/16 , C09K8/5045 , C09K8/508 , C09K8/516 , C09K2208/18
摘要： A lost circulation composition, that comprises a first portion of particles having a weight mean particle size of less than about 20 microns, a second portion of particles having a weight mean particle size in the range of from about 25 microns to about 400 microns, and a third portion of particles having a weight mean particle size in the range of from about 450 microns to about 1,500 microns, wherein the lost circulation composition has a multimodal particle size distribution, is provided, wherein resilient particles, particles comprising a thermoset polymer laminate, or a combination thereof are present in the lost circulation composition in an amount of at least about 20% by weight of the lost circulation composition, is provided. Drilling fluids, methods of controlling lost circulation, and methods of increasing an effective fracture gradient while drilling also are provided.
摘要翻译：一种失去循环的组合物，其包含重量平均粒度小于约20微米的第一部分颗粒，重量平均粒径在约25微米至约400微米范围内的第二部分颗粒，以及提供了重量平均粒度在约450微米至约1,500微米范围内的颗粒的第三部分，其中所述缺失循环组合物具有多峰粒度分布，其中弹性颗粒包含热固性聚合物层压体的颗粒，或其组合在损失循环组合物中的含量为至少约20重量％的损失循环组合物的量。提供钻井液，控制流失的方法，以及钻井时提高有效裂缝坡度的方法。

6. 发明授权

US08383558B2 Oilwell sealant compositions comprising alkali swellable latex 失效
公开(公告)号：US08383558B2
公开(公告)日：2013-02-26
申请号：US12357335
申请日：2009-01-21
申请人： B. Raghava Reddy , Mark R. Savery , Krishna M. Ravi , Donald L. Whitfill
发明人： B. Raghava Reddy , Mark R. Savery , Krishna M. Ravi , Donald L. Whitfill
IPC分类号： E21B33/13 , E21B43/00 , C09K8/00
CPC分类号： C09K8/5045 , C09K8/506 , C09K8/508
摘要： Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.

7. 发明授权

US07488705B2 Oilwell sealant compositions comprising alkali swellable latex 失效
标题翻译：含有可膨胀乳液的油井密封剂组合物
公开(公告)号：US07488705B2
公开(公告)日：2009-02-10
申请号：US11010117
申请日：2004-12-08
申请人： B. Raghava Reddy , Mark R. Savery , Krishna M. Ravi , Donald L. Whitfill
发明人： B. Raghava Reddy , Mark R. Savery , Krishna M. Ravi , Donald L. Whitfill
IPC分类号： E21B33/13 , E21B43/00 , C09K8/00
CPC分类号： C09K8/5045 , C09K8/506 , C09K8/508
摘要： Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.
摘要翻译：提供了包含碱溶胀性胶乳和pH增加材料的密封剂组合物及其使用方法来维护井筒。在一个实施方案中，密封剂组合物可用于井眼中，并且包括碱溶胀性胶乳和pH增加材料。密封剂组合物可以具有约7至约14的pH。在其它实施方案中，pH增加材料包括产生碱的材料。碱性物质可以包括碱金属和碱土金属碳酸盐，碱金属和碱土金属的碳酸氢盐，碱金属和碱土金属氢氧化物，碱金属和碱土金属氧化物，碱金属和碱土金属磷酸盐，碱金属和碱土金属磷酸氢盐，碱金属和碱土金属硫化物，硅酸盐的碱金属和碱土金属盐，铝酸盐的碱金属和碱土金属盐，水溶性或水分散性有机胺，聚合胺，氨基醇或其组合。

8. 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。

9. 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。

10. 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。

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