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51. 发明授权

US06376418B1 Process and catalyst for producing polyolefins having low molecular weight 失效
标题翻译：用于生产低分子量聚烯烃的方法和催化剂
公开(公告)号：US06376418B1
公开(公告)日：2002-04-23
申请号：US09559775
申请日：2000-04-27
申请人： Edwar S. Shamshoum , B. Raghava Reddy , Margarito Lopez
发明人： Edwar S. Shamshoum , B. Raghava Reddy , Margarito Lopez
IPC分类号： B01J3100
CPC分类号： C08F10/00 , C08F4/61912 , C08F4/61927 , C08F110/02 , C08F110/06 , Y10S526/943 , C08F2500/02 , C08F2500/03
摘要： The invention provides a metallocene catalyst for use in preparing polyolefins having low molecular weight. The catalyst comprises a bridged metallocene in which one of the cyclopentadienyl rings is substituted in a substantially different manner from the other ring. The catalyst comprises a metallocene compound generally described by the formula R″(C5R4)(R′2C5C4R′4)MeQp wherein (C5R4) is a substituted cyclopentadienyl ring; (R′2C5C4R′4n) is an indenyl ring or substituted indenyl ring; each R and R′ is hydrogen or hydrocarbyl radical having from 1-20 carbon atoms, a halogen, an alkoxy, and alkoxy alkyl or an alkylamino radical, each R and R′ may be the same or different; (C5R4) has one R substituent in a distal position which is at least as bulky as a t-butyl radical; R″ is a structural bridge between the (C5R4) and (R′2C5C4R′4) rings to impart stereorigidity; Q is a hydrocarbyl radical, such as an alkyl, aryl, alkenyl, alkylaryl or arylalkyl radical having 1-20 carbon atoms or is a halogen; Me is a Group IIIB, IVB, VB, or VIB metal as positioned in the Periodic Table of Elements; and p is the valence of Me minus 2.
摘要翻译：本发明提供用于制备低分子量聚烯烃的茂金属催化剂。该催化剂包括其中一个环戊二烯基环以与另一个环基本不同的方式被取代的桥连茂金属。该催化剂包含一般由式R“（C5R4）（R'2C5C4R'4）MeQp描述的茂金属化合物，其中（C5R4）是取代的环戊二烯基环; （R'2C5C4R'4n）是茚基环或取代的茚基环; 每个R和R'是氢或具有1-20个碳原子的烃基，卤素，烷氧基和烷氧基烷基或烷基氨基，每个R和R'可以相同或不同; （C5R4）在远端位置具有至少与叔丁基一样庞大的一个R取代基; R“是（C5R4）和（R'2C5C4R'4）环之间的结构桥，以赋予立体刚度; Q是烃基，例如具有1-20个碳原子的烷基，芳基，烯基，烷基芳基或芳基烷基，或者是卤素; Me是位于元素周期表中的IIIB，IVB，VB或VIB族金属; 而p是Me的价数减去2。

52. 发明授权

US06201081B1 Catalyst efficiency for supported metallocene catalyst 有权
公开(公告)号：US06201081B1
公开(公告)日：2001-03-13
申请号：US09305135
申请日：1999-05-04
申请人： Edwar S. Shamshoum , Margarito Lopez , B. Raghava Reddy , Theodore G. Harris
发明人： Edwar S. Shamshoum , Margarito Lopez , B. Raghava Reddy , Theodore G. Harris
IPC分类号： C08F442
CPC分类号： C08F10/00 , C08F4/61912 , C08F4/61927 , Y10S526/943 , C08F4/61916
摘要： The invention provides a polymerization process with improved catalyst activity of a metallocene catalyst supported on silica treated with MAO, a process for supporting a metallocene compound on silica treated with MAO, a metallocene catalyst supported on silica treated with MAO within a certain temperature range and a process for making a metallocene catalyst supported on silica treated with MAO. The invention includes supporting the metallocene compound on a MAO-treated silica at a temperature of below 0° C. The supported catalyst is activated with an aluminum alkyl. The catalyst may be prepolymerized in a tubular reactor prior to being introduced into the polymerization reaction zone.

53. 发明授权

US09890319B2 Compositions and systems for combatting lost circulation and methods of using the same 有权
公开(公告)号：US09890319B2
公开(公告)日：2018-02-13
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： C09K8/508 , C09K8/512 , C09K8/504
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.

54. 发明授权

US09518210B2 Compositions and systems for combatting lost circulation and methods 有权
标题翻译：打击流通和方法的组成和制度
公开(公告)号：US09518210B2
公开(公告)日：2016-12-13
申请号：US13460266
申请日：2012-04-30
申请人： Ryan G. Ezell , B. Raghava Reddy
发明人： Ryan G. Ezell , B. Raghava Reddy
IPC分类号： C09K8/504 , C09K8/508 , C09K8/512
CPC分类号： C09K8/5045 , C09K8/508 , C09K8/512
摘要： 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. A method of servicing a wellbore in a subterranean formation comprising placing a composition comprising a dilute solution of a cross-linkable material and an encapsulated activator into a lost circulation zone in the subterranean formation; and allowing the composition to set.
摘要翻译：一种在地下地层中维护井眼的方法，包括将包含金属丙烯酸酯的稀溶液的第一物流放置在地下地层的失水循环区中; 将包含活化剂的第二物流放入所述丢失循环区中; 以及在金属丙烯酸酯和活化剂接触时形成漏失循环材料，其中所述失水循环材料形成约0至约60分钟。一种在地下地层中维护井眼的方法，包括将包含可交联材料的稀溶液和包封的活化剂的组合物放置在地层中的失水循环区域中; 并允许组合物设定。

55. 发明授权

US09175206B2 Gellable treatment fluids having adjustable gel times and methods associated therewith 有权
标题翻译：可凝胶化处理液具有可调凝胶时间和与之相关的方法
公开(公告)号：US09175206B2
公开(公告)日：2015-11-03
申请号：US13454827
申请日：2012-04-24
申请人： B. Raghava Reddy , Larry S. Eoff , Freddy Crespo
发明人： B. Raghava Reddy , Larry S. Eoff , Freddy Crespo
IPC分类号： C09K8/508 , C09K8/512
CPC分类号： C09K8/882 , C09K8/5083 , C09K8/512 , C09K8/887
摘要： Gellable treatment fluids may have their gel times modified by using a polymer mixture therein that contains two or more polymers having disparate average molecular weights. Methods for treating a subterranean formation using such gellable treatment fluids can comprise providing a gellable treatment fluid comprising a polymer mixture and a crosslinking agent, introducing the gellable treatment fluid into a subterranean formation, and allowing the gellable treatment fluid to form a gel in the subterranean formation. The polymer mixture comprises a base polymer and an addend polymer, where the base polymer and the addend polymer each comprise an acrylamide monomer unit or a derivative thereof and have different average molecular weights, such that a molecular weight distribution of the polymer mixture contains at least two local maxima.
摘要翻译：可凝胶化处理液可以通过使用其中含有两种或更多种具有不同平均分子量的聚合物的聚合物混合物来改变凝胶时间。使用这种可胶凝处理流体处理地下地层的方法可以包括提供包含聚合物混合物和交联剂的可凝胶化处理流体，将可凝胶化处理流体引入地层，并允许可凝胶化处理流体在地下形成凝胶形成。聚合物混合物包含基础聚合物和加成聚合物，其中基础聚合物和加成聚合物各自包含丙烯酰胺单体单元或其衍生物，并且具有不同的平均分子量，使得聚合物混合物的分子量分布至少包含两个本地最大值。

56. 发明授权

US09090811B2 Gellable treatment fluids comprising amino group gel-time modifiers and methods for use thereof 有权
标题翻译：包含氨基凝胶时间改性剂的可凝胶化处理液及其使用方法
公开(公告)号：US09090811B2
公开(公告)日：2015-07-28
申请号：US13171718
申请日：2011-06-29
申请人： B. Raghava Reddy , Larry S. Eoff
发明人： B. Raghava Reddy , Larry S. Eoff
IPC分类号： C09K8/512 , C09K8/035 , C09K8/88
CPC分类号： C09K8/588 , C09K8/035 , C09K8/512 , C09K8/887
摘要： Methods for reducing the amount of water produced from a subterranean formation can include the use of a gellable treatment fluid that comprises a gel-time modifier comprising at least one amino group. The gellable treatment fluids can comprise an aqueous base fluid, a base polymer comprising an acrylamide monomer unit, an organic crosslinking agent, and a get-time modifier comprising at least one amino group.
摘要翻译：用于减少从地层产生的水量的方法可以包括使用包含至少一个氨基的凝胶时间改性剂的可凝胶化处理液。可凝胶化的处理流体可以包含含水基础流体，包含丙烯酰胺单体单元的基础聚合物，有机交联剂和包含至少一个氨基的吸附时间改性剂。

57. 发明授权

US09051506B2 Hydration acceleration surfactants in conjunction with high molecular weight polymers, and methods and compositions relating thereto 有权
标题翻译：与高分子量聚合物结合的水合加速表面活性剂，以及与其相关的方法和组合物
公开(公告)号：US09051506B2
公开(公告)日：2015-06-09
申请号：US13586026
申请日：2012-08-15
申请人： B. Raghava Reddy , Freddy Crespo , Larry S. Eoff , Christopher A. Lewis
发明人： B. Raghava Reddy , Freddy Crespo , Larry S. Eoff , Christopher A. Lewis
IPC分类号： E21B43/22 , E21B43/12 , E21B43/16 , E21B33/13 , C09K8/512 , C09K8/88
CPC分类号： C09K8/512 , C09K8/887 , E21B33/13 , E21B43/12 , E21B43/16
摘要： A hydration acceleration surfactant may be utilized in conjunction with high molecular weight polymers in forming high viscosity, aqueous based treatment fluids. Forming such fluids may involve mixing an aqueous base fluid, a hydration acceleration surfactant, a crosslinker polymer, and a base polymer, thereby yielding a treatment fluid, wherein the base polymer is provided in the form of a first polymeric emulsion before mixing and/or the crosslinker polymer is provided in the form of a second polymeric emulsion before mixing. Further, such fluids may be useful in subterranean operations to perform for at least one function within the wellbore and/or the subterranean formation including bridge a fracture, provide fluid loss control, seal a rock surface, enable fluid diversion, plug a void, reduce formation permeability, control water production, and any combination thereof.
摘要翻译：水合加速表面活性剂可以与高分子量聚合物结合使用，以形成高粘度，基于水的处理流体。形成这样的流体可以包括混合水性基础流体，水合加速表面活性剂，交联剂聚合物和基础聚合物，从而产生处理流体，其中基础聚合物在混合之前以第一聚合物乳液的形式提供和/或交联剂聚合物在混合之前以第二聚合物乳液的形式提供。此外，这种流体可用于地下作业中以对井眼和/或地下地层中的至少一个功能进行，包括桥断裂，提供流体损失控制，密封岩石表面，使流体转向，堵塞空隙，减少地层渗透性，控制水产量及其任何组合。

58. 发明授权

US08975217B2 Methods for treating a well with a cross-linked water-soluble polymer-complexed metal cation network and an aromatic compound capable of forming a chelating agent to uncross-link the polymer 有权
标题翻译：用交联的水溶性聚合物复合金属阳离子网络和能够形成螯合剂以使聚合物交联的芳族化合物处理孔的方法
公开(公告)号：US08975217B2
公开(公告)日：2015-03-10
申请号：US12490099
申请日：2009-06-23
申请人： B. Raghava Reddy , Rajesh K. Saini , Sherry G. Gaskins
发明人： B. Raghava Reddy , Rajesh K. Saini , Sherry G. Gaskins
IPC分类号： C09K8/60 , C09K8/68 , C09K8/72 , C09K8/528 , E21B33/13 , C09K8/70 , C09K8/88 , C09K8/92
CPC分类号： C09K8/706 , C09K8/685 , C09K8/887 , C09K8/92 , C09K2208/26
摘要： Methods are provided for treating a portion of a well. The method according to this aspect comprises the steps of: (A) forming a treatment fluid, the treatment fluid comprising: (i) water; (ii) a water-soluble polymer; (iii) a complexed metal cation that: (a) has a valence state of at least three; and (b) is capable of cross-linking the water-soluble polymer; and (iv) an aromatic compound that is capable of dissolving, melting, or chemically decomposing, dissociating, or reacting, to form a chelating agent, wherein the chelating agent comprising vicinal substituents containing donor heteroatoms, and wherein the chelating agent is capable of chelating the metal cation; and (B) introducing the treatment fluid into the well.
摘要翻译：提供了处理井的一部分的方法。根据该方面的方法包括以下步骤：（A）形成处理流体，所述处理流体包括：（i）水; （ii）水溶性聚合物; （iii）络合的金属阳离子：（a）具有至少三价的价态; 和（b）能够交联水溶性聚合物; 和（iv）能够溶解，熔融或化学分解，解离或反应形成螯合剂的芳族化合物，其中所述螯合剂包含含有供体杂原子的连位取代基，并且其中所述螯合剂能够螯合金属阳离子; 和（B）将处理流体引入井中。

59. 发明授权

US08720562B2 Wellbore cementing compositions and methods of making and using same 失效
标题翻译：井筒固井组合物及其制备和使用方法
公开(公告)号：US08720562B2
公开(公告)日：2014-05-13
申请号：US12907209
申请日：2010-10-19
申请人： B. Raghava Reddy , Rahul Chandrakant Patil , Sandip Pati
发明人： B. Raghava Reddy , Rahul Chandrakant Patil , Sandip Pati
IPC分类号： E21B33/13
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。

60. 发明申请

US20130056199A1 LEWIS ACID AS GELATION RETARDER FOR CROSSLINKABLE POLYMER COMPOSITIONS 有权
标题翻译： LEWIS ACID作为可交联聚合物组合物的凝胶阻滞剂
公开(公告)号：US20130056199A1
公开(公告)日：2013-03-07
申请号：US13665151
申请日：2012-10-31
申请人： B. Raghava Reddy , Larry S. Eoff , Julio Estuardo Vasquez , Eldon Dwyann Dalrymple
发明人： B. Raghava Reddy , Larry S. Eoff , Julio Estuardo Vasquez , Eldon Dwyann Dalrymple
IPC分类号： C09K8/588 , E21B43/22
CPC分类号： C09K8/512 , C09K8/5083 , C09K8/882 , C09K8/887
摘要： A treatment fluid for a well including: (a) a water-soluble polymer, wherein the water-soluble polymer comprises a polymer of at least one non-acidic ethylenically unsaturated polar monomer; (b) an organic crosslinker comprising amine groups, wherein the organic crosslinker is capable of crosslinking the water-soluble polymer; (c) a Lewis acid; and (d) water; wherein the treatment fluid is a crosslinkable polymer composition. According to an embodiment, a method for blocking the permeability of a portion of a subterranean formation penetrated by a wellbore is provided, the method including the steps of: (a) selecting the portion of the subterranean formation to be treated; (b) selecting estimated treatment conditions, wherein the estimated treatment conditions comprise temperature over a treatment time; (c) forming the treatment fluid; and (d) injecting the treatment fluid through the wellbore into the portion of the subterranean formation.
摘要翻译：一种用于井的处理流体，包括：（a）水溶性聚合物，其中所述水溶性聚合物包含至少一种非酸性烯属不饱和极性单体的聚合物; （b）包含胺基的有机交联剂，其中所述有机交联剂能够交联所述水溶性聚合物; （c）路易斯酸; 和（d）水; 其中所述处理流体是可交联聚合物组合物。根据一个实施例，提供了一种用于阻挡由井眼穿透的地下地层的一部分渗透性的方法，所述方法包括以下步骤：（a）选择待处理的地层的部分; （b）选择估计的治疗条件，其中估计的治疗条件包括治疗时间以上的温度; （c）形成处理液; 和（d）将处理流体通过井眼注入到地层的部分中。

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