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    • 3. 发明申请
    • Compositions and systems for combatting lost circulation and methods of using the same
    • 打击流通的组成和制度及其使用方法
    • US20110114318A1
    • 2011-05-19
    • US12621329
    • 2009-11-18
    • Ryan G. EzellB. Raghava Reddy
    • Ryan G. EzellB. Raghava Reddy
    • E21B43/16
    • C09K8/5045C09K8/508C09K8/512
    • 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.
    • 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。
    • 7. 发明申请
    • Methods of Using Fluid Loss Additives Comprising Micro Gels
    • 使用包含微凝胶的流体损失添加剂的方法
    • US20110168393A1
    • 2011-07-14
    • US13051077
    • 2011-03-18
    • Ryan G. EzellJun Jim Wu
    • Ryan G. EzellJun Jim Wu
    • C09K8/06E21B43/16
    • C09K8/035C09K8/512C09K2208/18
    • Methods and fluids are provided that include, but are not limited to, a drilling fluid comprising an aqueous base fluid and a fluid loss control additive that comprises at least one polymeric micro gel and a method comprising: providing an aqueous based treatment fluid comprising a fluid loss control additive that comprises at least one polymeric micro gel; placing the aqueous based treatment fluid in a subterranean formation via a well bore penetrating the subterranean formation; allowing the fluid loss control additive to become incorporated into a filter cake located on a surface within the subterranean formation; allowing the filter cake to be degraded; and producing hydrocarbons from the formation. Additional methods are also provided.
    • 提供了方法和流体,其包括但不限于包含含水基础流体和流体损失控制添加剂的钻井流体,所述流体损失控制添加剂包括至少一种聚合物微凝胶和包括以下的方法:提供包含流体的含水基处理流体 包含至少一种聚合物微凝胶的损失控制添加剂; 通过穿透地下地层的井眼将水基处理流体置于地下地层中; 允许流体损失控制添加剂结合到位于地层内的表面上的滤饼中; 允许滤饼降解; 并从地层生产烃类。 还提供了附加的方法。
    • 9. 发明申请
    • Preparation of Micro Gel Particle Dispersions and Dry Powders Suitable For Use As Fluid Loss Control Agents
    • 适用于流体损失控制剂的微凝胶颗粒分散体和干粉的制备
    • US20100256298A1
    • 2010-10-07
    • US12418322
    • 2009-04-03
    • Jun Jim WuRyan G. Ezell
    • Jun Jim WuRyan G. Ezell
    • C08L33/10C08L33/24C08L41/00
    • C08F2/22C08F2/14
    • This invention relates to dispersions and powders of micro gel particles, and more specifically, at least in some instances, dispersions of micro gel particles formed from crosslinked water-soluble or swellable polymers, and methods of preparing such micro gel particle dispersions. In one aspect, the invention provides a method of preparing synthetic micro gel particles, comprising forming a reaction mixture by dissolving or swelling a water-soluble or water-swellable unsaturated monomer, unsaturated crosslinking agent, and radical initiator in a common solvent that is substantially inert toward chain transfer reactions, wherein the monomer and the crosslinking agent polymerize to form crosslinked polymer micro gel particles that are insoluble or at most swellable in the common solvent.
    • 本发明涉及微凝胶颗粒的分散体和粉末,更具体地,至少在某些情况下,由交联的水溶性或可溶胀聚合物形成的微凝胶颗粒的分散体,以及制备这种微凝胶颗粒分散体的方法。 一方面,本发明提供一种制备合成微凝胶颗粒的方法,包括通过将水溶性或水溶胀性或不溶性的不饱和单体,不饱和交联剂和自由基引发剂溶解或溶胀在基本上为 对链转移反应是惰性的,其中单体和交联剂聚合以形成在常见溶剂中不溶或至多可溶胀的交联聚合物微凝胶颗粒。