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    Methods and compositions for altering the viscosity of treatment fluids used in subterranean operations
    73.
    发明授权
    Methods and compositions for altering the viscosity of treatment fluids used in subterranean operations 有权
    用于改变地下作业中使用的处理液的粘度的方法和组合物

    公开(公告)号：US08114818B2

    公开(公告)日：2012-02-14

    申请号：US12009027

    申请日：2008-01-16

    申请人： B. Raghava Reddy ,  Narongsak Tonmukayakul

    发明人： B. Raghava Reddy ,  Narongsak Tonmukayakul

    IPC分类号： C09K8/68

    CPC分类号： C09K8/86 ,  C09K8/035 ,  C09K8/502 ,  C09K8/506 ,  C09K8/5083 ,  C09K8/64 ,  C09K8/68 ,  C09K8/82 ,  C09K8/882 ,  C09K2208/30

    摘要： An embodiment of the present invention includes a method comprising introducing a cyclodextrin modifier into a well bore penetrating a subterranean formation. Another embodiment of the present invention includes a method of reducing viscosity of a treatment fluid comprising contacting a treatment fluid comprising a base fluid and a viscosifying agent with at least a cyclodextrin modifier wherein the cyclodextrin modifier interacts with the viscosifying agent to reduce viscosity of the treatment fluid. Another embodiment of the present invention includes a method of increasing viscosity of an aqueous fluid comprising contacting at least a hydrophobically modified polymer and a cyclodextrin modifier in the presence of at least the aqueous fluid, wherein the cyclodextrin modifier interacts with the hydrophobically modified polymer to viscosify the aqueous fluid. Another embodiment of the present invention includes a subterranean treatment fluid comprising a base fluid and a cyclodextrin modifier.

    摘要翻译： 本发明的一个实施方案包括一种方法，其包括将环糊精改性剂引入穿透地层的井筒中。 本发明的另一个实施方案包括降低处理流体的粘度的方法，包括使包含基础流体和增粘剂的处理流体与至少一种环糊精改性剂接触，其中环糊精改性剂与增粘剂相互作用以降低处理粘度 流体。 本发明的另一个实施方案包括增加含水流体的粘度的方法，包括在至少含水流体存在下使至少一种疏水改性聚合物和环糊精改性剂接触，其中该环糊精改性剂与该疏水改性聚合物相互作用以进行粘合 含水液体。 本发明的另一个实施方案包括含有基础流体和环糊精改性剂的地下处理流体。

    Compositions and systems for combatting lost circulation and methods of using the same
    74.
    发明申请
    Compositions and systems for combatting lost circulation and methods of using the same 有权
    打击流通的组成和制度及其使用方法

    公开(公告)号：US20110114318A1

    公开(公告)日：2011-05-19

    申请号：US12621329

    申请日：2009-11-18

    申请人： Ryan G. Ezell ,  B. Raghava Reddy

    发明人： Ryan G. Ezell ,  B. Raghava Reddy

    IPC分类号： E21B43/16

    CPC分类号： C09K8/5045 ,  C09K8/508 ,  C09K8/512

    摘要： A method of servicing a wellbore in a subterranean formation comprising preparing a composition comprising a base fluid, a thixotropic viscosifier, a gellable composition and a bridging material, applying a shear force to the composition such that the composition viscosity decreases, introducing the composition into a lost circulation zone in the subterranean formation, wherein the lost circulation zone comprises cavities greater than about 200 microns in diameter, decreasing the shear force applied to the composition, and allowing the composition to set in the lost circulation zone. A method of servicing a wellbore in a subterranean formation comprising placing a first stream comprising a dilute solution of a metal acrylate into a lost circulation zone in the subterranean formation, placing a second stream comprising an activator into the lost circulation zone, and forming a lost circulation material upon contacting of the metal acrylate and the activator, wherein the lost circulation material forms in from about 0 to about 60 minutes.

    摘要翻译： 一种在地下地层中维护井眼的方法，包括制备包含基础流体，触变增粘剂，可胶凝组合物和桥连材料的组合物，向组合物施加剪切力使得组合物粘度降低，将组合物引入 地下地层中的失水循环区，其中所述失水循环区包括直径大于约200微米的空腔，降低施加于所述组合物的剪切力，并允许所述组合物置于所述失水循环区中。 一种在地下地层中维护井筒的方法，包括将包含金属丙烯酸酯稀溶液的第一物流放置在地层中的失去循环区域中，将包含活化剂的第二物流放入到损失的循环区中， 金属丙烯酸酯和活化剂接触时的循环材料，其中所述失水循环材料形成约0至约60分钟。

    Casing shoes and methods of reverse-circulation cementing of casing
    75.
    发明授权
    Casing shoes and methods of reverse-circulation cementing of casing 有权
    套管鞋套和反向循环固井方法

    公开(公告)号：US07938186B1

    公开(公告)日：2011-05-10

    申请号：US11940095

    申请日：2007-11-14

    申请人： Anthony M. Badalamenti ,  Simon Turton ,  Karl W. Blanchard ,  Ronald R. Faul ,  Michael G. Crowder ,  Henry E. Rogers ,  James E. Griffith ,  B. Raghava Reddy

    发明人： Anthony M. Badalamenti ,  Simon Turton ,  Karl W. Blanchard ,  Ronald R. Faul ,  Michael G. Crowder ,  Henry E. Rogers ,  James E. Griffith ,  B. Raghava Reddy

    IPC分类号： E21B33/12

    CPC分类号： E21B34/102 ,  E21B21/10 ,  E21B33/14

    摘要： A method having the following steps: running a circulation valve comprising a reactive material into the well bore on the casing; reverse-circulating an activator material in the well bore until the activator material contacts the reactive material of the circulation valve; reconfiguring the circulation valve by contact of the activator material with the reactive material; and reverse-circulating a cement composition in the well bore until the reconfigured circulation valve decreases flow of the cement composition. A circulation valve for cementing casing in a well bore, the valve having: a valve housing connected to the casing and comprising a reactive material; a plurality of holes in the housing, wherein the plurality of holes allow fluid communication between an inner diameter of the housing and an exterior of the housing, wherein the reactive material is expandable to close the plurality of holes.

    摘要翻译： 一种具有以下步骤的方法：将包括反应性材料的循环阀运送到所述壳体上的井眼中; 在井眼中使活化剂材料反向循环，直到活化剂材料接触循环阀的反应性材料; 通过活化剂材料与反应性材料的接触来重新配置循环阀; 并使井眼中的水泥组合物反向循环，直到重新配置的循环阀减少水泥组合物的流动。 一种用于将套管固定在井眼中的循环阀，所述阀具有：连接到所述壳体并包括反应性材料的阀壳体; 所述壳体中的多个孔，其中所述多个孔允许所述壳体的内径和所述壳体的外部之间的流体连通，其中所述反应性材料可膨胀以封闭所述多个孔。

    Storable nonaqueous cement slurries and methods of using same
    77.
    发明授权
    Storable nonaqueous cement slurries and methods of using same 有权
    可储存的非水性水泥浆料及其使用方法

    公开(公告)号：US07575055B2

    公开(公告)日：2009-08-18

    申请号：US11428771

    申请日：2006-07-05

    申请人： B. Raghava Reddy ,  Mfon Antia

    发明人： B. Raghava Reddy ,  Mfon Antia

    IPC分类号： E21B33/13

    CPC分类号： C09K8/467 ,  C04B14/06 ,  C04B24/2611 ,  C04B28/02 ,  C04B14/047 ,  C04B14/064 ,  C04B24/02 ,  C04B24/2641 ,  C04B24/2652 ,  C04B24/2664 ,  C04B24/2676 ,  C04B2103/40

    摘要： A method of servicing a wellbore comprising preparing a nonaqueous storable cementitious composition, mixing said composition with an aqueous fluid and, placing said composition into a wellbore. A method of cementing comprising preparing a mixture of cement, a suspension fluid, a dehydrating agent, a first surfactant, and a suspension aid, adding an aqueous solution and a second surfactant to said mixture and, placing the mixture downhole, and allowing the cement to set. A method of producing a lightweight cement slurry comprising the addition of a nonaqueous fluid to cement and water wherein the water content is less than about 40% by total weight of the composition. A method of servicing a wellbore comprising preparing a cement composition comprising from about 80% by weight cement suspended in a nonaqueous fluid, and stabilizing said cement composition through the addition of a suspension aid.

    摘要翻译： 一种维修井筒的方法，包括制备非水可储存的水泥质组合物，将所述组合物与含水流体混合，并将所述组合物置于井筒中。 一种固井方法，包括制备水泥，悬浮液，脱水剂，第一表面活性剂和悬浮助剂的混合物，向所述混合物中加入水溶液和第二表面活性剂，并将混合物置于井下，并允许水泥 设置。 一种生产轻质水泥浆料的方法，包括向水泥和水中加入非水性流体，其中水含量小于组合物总重量的约40％。 一种维修井筒的方法，包括制备包含约80重量％悬浮在非水流体中的水泥的水泥组合物，以及通过添加悬浮助剂来稳定所述水泥组合物。

    Cement compositions containing flexible, compressible beads and methods of cementing in subterranean formations
    78.
    发明授权
    Cement compositions containing flexible, compressible beads and methods of cementing in subterranean formations 有权
    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。

    Self repairing cement compositions and methods of using same
    79.
    发明授权
    Self repairing cement compositions and methods of using same 有权
    自修水泥组合物及其使用方法

    公开(公告)号：US07530396B1

    公开(公告)日：2009-05-12

    申请号：US12107416

    申请日：2008-04-22

    申请人： B. Raghava Reddy ,  Feng Liang ,  Russell M. Fitzgerald ,  David Meadows

    发明人： B. Raghava Reddy ,  Feng Liang ,  Russell M. Fitzgerald ,  David Meadows

    IPC分类号： E21B33/13

    CPC分类号： C09K8/467 ,  C04B24/163 ,  C04B24/2641 ,  C04B24/2652 ,  C04B24/2676 ,  C04B24/42

    摘要： A method of servicing a wellbore comprising placing a cement composition comprising a cementitious material, water, and an elastomeric material comprising a bonding polar group into a wellbore, and allowing the cement composition to set to form a set cement, wherein the elastomeric material has a phase transition temperature, exhibits cold flow behavior, or both at less than or equal to the bottom hole static temperature of the wellbore. A method of servicing a cased wellbore penetrating a formation, comprising introducing a self-repairing cementitious material into a wellbore, and allowing the cement to set, wherein upon a loss of structural integrity the set cement self-repairs, and wherein the loss of structural integrity comprises the formation of flow pathways for fluid migration in the cement and self-repair comprises obstructing potential pathways for fluid migration.

    摘要翻译： 一种维修井孔的方法，包括将包含粘结极性基团的水泥组合物，水和包含粘结极性基团的弹性体材料的水泥组合物放置在井眼中，并且允许水泥组合物凝固形成固定水泥，其中弹性体材料具有 相转变温度，表现出冷流行为，或两者都小于或等于井眼的井底静态温度。 一种对穿透地层的套管井眼进行维修的方法，包括将自修复的水泥质材料引入井眼中，并允许水泥固化，其中，在失去结构完整性的情况下，固定水泥自修复，并且其中结构损失 完整性包括形成用于水泥中流体迁移的流动路径，并且自我修复包括阻碍流体迁移的潜在途径。

    Methods of drilling wellbores using variable density fluids comprising coated elastic particles
    80.
    发明授权
    Methods of drilling wellbores using variable density fluids comprising coated elastic particles 有权
    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。