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11.发明授权Additive for increasing the density of a fluid for casing annulus pressure control 有权用于增加套管环空压力控制的流体密度的添加剂公开(公告)号：US07449431B2
公开(公告)日：2008-11-11
申请号：US11015125
申请日：2004-12-17
CPC分类号： B41F31/26 , B41F31/027 , Y10S507/906
摘要： A method of controlling the pressure of a casing annulus in a subterranean well that includes injecting into the casing annulus a composition including a base fluid and a polymer coated colloidal solid material. The polymer coated colloidal solid material includes: a solid particle having an weight average particle diameter (d50) of less than two microns, and a polymeric dispersing agent coated onto the surface of the solid particle during the comminution (i.e. grinding) process utilized to make the colloidal particles. The polymeric dispersing agent may be a water soluble polymer having a molecular weight of at least 2000 Daltons. The solid particulate material may be selected from materials having of specific gravity of at least 2.68 and preferably the solid particulate material may be selected from barium sulfate (barite), calcium carbonate, dolomite, ilmenite, hematite, olivine, siderite, strontium sulfate, combinations and mixtures of these-and other similar solids.
摘要翻译： 一种控制地下井中的壳体环的压力的方法，其包括向壳体环空注入包含基础流体和聚合物涂覆的胶态固体材料的组合物。 聚合物涂覆的胶体固体材料包括：具有小于2微米重量平均粒径（d <50>）的固体颗粒和在粉碎期间涂覆在固体颗粒表面上的聚合物分散剂 （即研磨）工艺用于制备胶体颗粒。 聚合物分散剂可以是分子量至少为2000道尔顿的水溶性聚合物。 固体颗粒材料可以选自具有至少2.68的比重的材料，并且优选固体颗粒材料可以选自硫酸钡（重晶石），碳酸钙，白云石，钛铁矿，赤铁矿，橄榄石，菱铁矿，硫酸锶，组合 以及这些和其它类似固体的混合物。
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公开(公告)号：US06803347B1
公开(公告)日：2004-10-12
申请号：US09533750
申请日：2000-03-23
IPC分类号： C09K902
摘要： A low molecular weight, high melting point, crystalline, oil soluble additive for use in wellbore fluids is provided that is preferably a ground crystalline material of melting point over 80° C., preferably over 100° C. which is readily soluble in produced hydrocarbons such as crude oil and lighter condensates, and which exhibits a molecular weight of less than 1000, and preferably less than 500, and more preferably less than 300. Its particle size can be adjusted to bridge efficiently across different pore size formations and control its solubility rate.
摘要翻译： 提供了用于井眼流体的低分子量，高熔点，结晶，油溶性添加剂，其优选是熔点超过80℃，优选超过100℃的研磨结晶材料，其易于溶解在生产的烃 例如原油和较轻的缩合物，并且其分子量小于1000，优选小于500，更优选小于300.可以调节其粒径以有效跨越不同孔径的结构并控制其溶解度 率。
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13.发明授权Composition of base fluid and polymeric dispersing agent-absorbed polymer-coated colloidal particles 有权基础液和聚合物分散剂吸收的聚合物涂覆胶体颗粒的组成公开(公告)号：US07727939B2
公开(公告)日：2010-06-01
申请号：US11015124
申请日：2004-12-17
CPC分类号： B41F31/26 , B41F31/027 , Y10S507/906
摘要： A method of controlling the pressure of a casing annulus in a subterranean well that includes injecting into the casing annulus a composition including a base fluid and a polymer coated colloidal solid material. The polymer coated colloidal solid material includes: a solid particle having an weight average particle diameter (d50) of less than two microns, and a polymeric dispersing agent coated onto the surface of the solid particle during the cominution (i.e. grinding) process utilized to make the colloidal particles. The polymeric dispersing agent may be a water soluble polymer having a molecular weight of at least 2000 Daltons. The solid particulate material may be selected from materials having of specific gravity of at least 2.68 and preferably the solid particulate material may be selected from barium sulfate (barite), calcium carbonate, dolomite, ilmenite, hematite, olivine, siderite, strontium sulfate, combinations and mixtures of these and other similar solids that should be apparent to one of skill in the art.
摘要翻译： 一种控制地下井中的壳体环的压力的方法，其包括向壳体环空注入包含基础流体和聚合物涂覆的胶态固体材料的组合物。 聚合物涂覆的胶态固体材料包括：重均粒径（d50）小于2微米的固体颗粒，以及在用于制备（a）的过程中涂覆在固体颗粒表面上的聚合物分散剂 胶体颗粒。 聚合物分散剂可以是分子量至少为2000道尔顿的水溶性聚合物。 固体颗粒材料可以选自具有至少2.68的比重的材料，并且优选固体颗粒材料可以选自硫酸钡（重晶石），碳酸钙，白云石，钛铁矿，赤铁矿，橄榄石，菱铁矿，硫酸锶，组合 以及这些和其他类似固体的混合物，其对于本领域技术人员应该是显而易见的。
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公开(公告)号：US06861394B2
公开(公告)日：2005-03-01
申请号：US10026063
申请日：2001-12-19
CPC分类号： C09K8/536 , Y10S507/902 , Y10S507/906 , Y10S507/921
摘要： A wellbore fluid including a peroxide degradable polymer and an encapsulated peroxide source. The peroxide degradable polymer may be a polysaccharide. The peroxide source may include an inorganic peroxide, including zinc and alkaline earth metal peroxides, such as magnesium peroxide. The encapsulating material may be a polymer, including enteric polymers. The release of peroxide, from peroxide sources generally, can be controlled by means of pH such that peroxide source can be activated, and peroxide released, by a change in pH. In a wellbore, this pH change can be effected by using produced fluids to lower the pH of a more basic wellbore fluid.
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