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公开(公告)号：US06283228B1
公开(公告)日：2001-09-04
申请号：US09737877
申请日：2000-12-15
IPC分类号： E21B4900
摘要： A method for protecting integrity of a core sample during transport from a subterranean formation to the surface comprising: cutting a core sample from the subterranean formation using a drilling fluid; encapsulating the core sample with an encapsulating material that is separate from the drilling fluid and comprises a property which renders the encapsulating material capable of protecting the chemical integrity of the core sample during transport from the subterranean formation to the surface, wherein the property is other than a property selected from the group consisting of a viscosity which increases in response to a decrease in temperature and an ability to solidify in response to a decrease in temperature; and, transporting the encapsulated core sample from the subterranean formation to the surface.
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公开(公告)号：US5881825A
公开(公告)日：1999-03-16
申请号：US780560
申请日：1997-01-08
IPC分类号： E21B25/08
CPC分类号： E21B25/08
摘要： The present invention provides a method for protecting the integrity of a core sample during transport from a subterranean formation to the surface comprising: cutting a core sample from the subterranean formation using a drilling fluid; encapsulating the core sample with an encapsulating material separate from the drilling fluid, the encapsulating material being capable in the absence of a chemical reaction of protecting core sample integrity during transport from said subterranean formation to said surface; and, transporting the encapsulated core sample from the subterranean formation to the surface.
摘要翻译： 本发明提供了一种用于在从地下地层运送到地面期间保护核心样品的完整性的方法，包括：使用钻井液从地层切割芯样品; 用与钻井液分离的封装材料包封核心样品，所述封装材料能够在从所述地层运输到所述表面期间不存在保护核心样品完整性的化学反应; 并且将包封的核心样品从地层运送到表面。
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公开(公告)号：US4963273A
公开(公告)日：1990-10-16
申请号：US245267
申请日：1988-09-16
IPC分类号： C09K8/06
CPC分类号： C09K8/06 , Y10S507/905
摘要： The present invention provides a modified liquid phase drilling fluid having desirable properties of shale swelling inhibition, lubrication, and high temperature performance. The fluid does not rely on the incorporation of inorganic salts or high molecular weight water soluble polymers for control of shale swelling or shale disintegration and exhibits performance characteristics, approaching those of oil base drilling fluids, without the objectionable properties of hydrocarbon oils or its potential hazardous impact on the environment. The fluid is comprised of the following: (1) a liquid phase containing; (a) a water phase comprising fresh water, seawater, brine, simulated brine, or mixtures thereof; and (b) a water-soluble component selected from the class consisting of polyhydric alcohols, glycol, glycol ethers, polypropylene glycols, polyethylene glycols, ethylene oxide-propylene oxide copolymers ("EO-PO"), alcohol-initiated EO-PO copolymers and/or mixtures thereof, the ratio of said water-soluble component in the total liquid phase being from about 5% to about 50% by volume; (2) a viscosifier for suspension of solids in said liquid phase; and (3) a filtration control agent. The fluid with the water soluble component will exhibit a lubricity coefficient lower than that for substantially the same fluid without the water soluble component as determined by the American Petroleum Institute's "Procedure for Determination of Lubricity Coefficient (Tentative)" (1980), and the linear swelling on a reconstituted "gumbo" shale inserted for about 60 minutes of said drilling fluid being from lower than that for substantially the same fluid without the water soluble component, as measured by the "Swelling Test", "Rigsite Shale Evaluation Techniques for Control of Shale-related Wellbore Instability Problems", SPE/IADC Paper No. 16054, pages 52-53, (1987).
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公开(公告)号：US4309329A
公开(公告)日：1982-01-05
申请号：US131328
申请日：1980-03-18
IPC分类号： C08F220/06 , C08F220/56 , C09K8/24 , C08L33/02
CPC分类号： C09K8/24 , C08F220/06 , C08F220/56
摘要： The invention relates to an aqueous solution of a filtration control agent for utilization in said aqueous drilling fluid, useful in a method of forming a filter cake on the wall of a well for the reduction of filtrate from said drilling fluid, which is effective at high temperatures and pressures, the terpolymer consisting essentially of: (1) an alkali metal acrylate units; (2) hydroxyalkyl acrylate units; and (3) acrylamide.
摘要翻译： 本发明涉及一种用于所述含水钻井液的过滤控制剂的水溶液，可用于在井的壁上形成滤饼以从所述钻井液中还原滤液的方法，该方法在高效下 温度和压力，三元共聚物基本上由以下组成：（1）碱金属丙烯酸酯单元; （2）丙烯酸羟烷基酯单元; 和（3）丙烯酰胺。
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公开(公告)号：US4288582A
公开(公告)日：1981-09-08
申请号：US088894
申请日：1979-10-29
IPC分类号： C08F220/06 , C08F220/56 , C09K8/24 , E21B21/00 , C08F22/38
CPC分类号： C08F220/06 , C08F220/56 , C09K8/24 , E21B21/003
摘要： The invention relates to an aqueous drilling fluid composition, a filtration control agent for utilization in said aqueous drilling fluid, and a method of forming a filter cake on the wall of a well for the reduction of filtrate from said drilling fluid, which are effective at high temperatures and pressures, by utilization of a terpolymer of: (1) a monovalent alkali metal salt of acrylic acid; (2) an hydroxy alkyl acrylate; and (3) acrylamide.
摘要翻译： 本发明涉及含水钻井液组合物，用于所述含水钻井液中的过滤控制剂，以及在井壁上形成滤饼以从所述钻井液中还原滤液的方法，所述滤液在 高温和高压，通过使用以下三元共聚物：（1）丙烯酸的一价碱金属盐; （2）丙烯酸羟烷基酯; 和（3）丙烯酰胺。
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公开(公告)号：US5099930A
公开(公告)日：1992-03-31
申请号：US646088
申请日：1991-01-25
摘要： A method is provided for the prevention of balling of formation cuttings upon the surface of drilling equipment and for lubrication of said equipment used in conjunction with subterranean well operations. An aqueous system is prepared to which is added a composition of a water insoluble polyglycol having a molecular weight of from between about 1,200 and about 10,000, an emulsifying surfactant having a hydrophilic/hydrophobic balance of about 4 or more, and a hydrotrope. An additive for use in the method also is disclosed.
摘要翻译： 提供了一种用于防止钻井设备表面上的成形切屑的球磨和用于与地下井操作结合使用的所述设备的润滑的方法。 制备水性体系，向其中加入分子量为约1,200至约10,000的水不溶性聚乙二醇的组合物，具有约4或更高的亲水/疏水平衡的乳化表面活性剂和水溶助长剂。 还公开了用于该方法的添加剂。
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公开(公告)号：US4268400A
公开(公告)日：1981-05-19
申请号：US131327
申请日：1980-03-18
IPC分类号： C08F220/06 , C08F220/56 , C09K8/24 , E21B21/00 , C09K7/02
CPC分类号： C08F220/56 , C08F220/06 , C09K8/24 , E21B21/003
摘要： The invention relates to an aqueous drilling fluid composition, a filtration control agent for utilization in said aqueous drilling fluid, and a method of forming a filter cake on the wall of a well for the reduction of filtrate from said drilling fluid, which are effective at high temperatures and pressures, by utilization of a terpolymer of: (1) a monovalent alkali metal salt of acrylic acid; (2) an hydroxy alkyl acrylate; and (3) acrylamide.
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8.发明授权Method and composition for preserving core sample integrity using an encapsulating material 失效使用封装材料保存核心样品完整性的方法和组合物
公开(公告)号：US5560438A
公开(公告)日：1996-10-01
申请号：US214392
申请日：1994-03-16
摘要： The present invention provides a method for maximizing the chemical integrity and, if desired, maintaining the mechanical integrity of a core sample during transport from a subterranean formation to the surface. The method involves cutting and encapsulating the core sample as it enters the core barrel with an encapsulating material that either (a) inherently is capable of protecting the chemical integrity of the core sample, or (b) is capable of increasing in viscosity and/or solidifying in response to natural decreases in temperature to maintain the mechanical integrity and maximize the chemical integrity of the core sample during transport.
摘要翻译： 本发明提供了一种最大化化学完整性的方法，并且如果需要，在从地层到地面运输过程中保持芯样品的机械完整性。 核心样品进入核心筒的方法包括：（a）固有地能够保护核心样品的化学完整性的封装材料，或（b）能够增加粘度和/或 响应于温度的自然降低而固化以保持机械完整性并且在运输期间使芯样品的化学完整性最大化。
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公开(公告)号：US4941981A
公开(公告)日：1990-07-17
申请号：US245050
申请日：1988-09-16
IPC分类号： C09K8/06
CPC分类号： C09K8/06 , Y10S507/905
摘要： The present invention provides a modified liquid phase drilling fluid having desirable properties of shale swelling inhibition, lubrication, and high temperature performance. The fluid does not rely on the incorporation of inorganic salts or high molecular weight water soluble polymers for control of shale swelling or shale disintegration and exhibits performance characteristics, approaching those of oil base drilling fluids, without the objectionable properties of hydrocarbon oils or its potential hazardous impact on the environment. The fluid is comprised of the following: (1) a liquid phase containing: (a) a water phase comprising fresh water, seawater, brine, simulated brine, or mixtures thereof; and (b) a water-soluble component selected from the class consisting of polyhydric alcohols, glycol, glycol ethers, polypropylene glycols, polyethylene glycols, ethylene oxide-propylene oxide copolymers ("EO-PO"), alcohol-initiated EO-PO copolymers and/or mixtures thereof, the ratio of said water-soluble component in the total liquid phase being from about 5% to about 50% by volume; (2) a viscosifier for suspension of solids in said liquid phase; and (3) a filtration control agent. The fluid with the water soluble component will exhibit a lubricity coefficient lower than that for substantially the same fluid without the water soluble component as determined by the American Petroleum Institute's "Procedure for Determination of Lubricity Coefficient (Tentative)" (1980), and the linear swelling on a reconstituted "gumbo" shale inserted for about 60 minutes of said drilling fluid being from lower than that for substantially the same fluid without the water soluble component, as measured by the "Swelling Test", "Rigsite Shale Evaluation Techniques for Control of Shale-related Wellbore Instability Problems", SPE/IADC Paper No. 16054, pages 52-53, (1987).
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公开(公告)号：US4293427A
公开(公告)日：1981-10-06
申请号：US131329
申请日：1980-03-18
CPC分类号： C09K8/24 , E21B21/003
摘要： The invention relates to an aqueous drilling fluid composition, a filtration control agent for utilization in said aqueous drilling fluid, and a method of forming a filter cake on the wall of a well for the reduction of filtrate from said drilling fluid, by utilization of a copolymer of: (1) a (meth) acrylamido alkyl sulfonic acid or alkali metal salt thereof; and (2) a (meth) acrylamide or N-alkyl (meth) acrylamide. The copolymer may be cross-linked with a quaternary ammonium salt cross-linking agent.
摘要翻译： 本发明涉及含水钻井液组合物，用于所述含水钻井液中的过滤控制剂，以及在井壁上形成滤饼以从所述钻井液中还原滤液的方法，通过使用 共聚物：（1）（甲基）丙烯酰氨基烷基磺酸或其碱金属盐; 和（2）（甲基）丙烯酰胺或（甲基）丙烯酸N-烷基酯。 共聚物可以与季铵盐交联剂交联。
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