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    Methods and compositions for controlling lost circulation in subterranean operations
    1.
    发明申请
    Methods and compositions for controlling lost circulation in subterranean operations 有权
    控制地下作业中流失的方法和组成

    公开(公告)号：US20060096759A1

    公开(公告)日：2006-05-11

    申请号：US10982016

    申请日：2004-11-05

    申请人： B. Reddy ,  Donald Whitfill ,  Krishna Ravi ,  Mark Savery

    发明人： B. Reddy ,  Donald Whitfill ,  Krishna Ravi ,  Mark Savery

    IPC分类号： E21B33/138 ,  E21B21/00

    CPC分类号： C09K8/16 ,  C09K8/5045 ,  C09K8/508 ,  C09K8/516 ,  C09K2208/18

    摘要： A lost circulation composition, that comprises a first portion of particles having a weight mean particle size of less than about 20 microns, a second portion of particles having a weight mean particle size in the range of from about 25 microns to about 400 microns, and a third portion of particles having a weight mean particle size in the range of from about 450 microns to about 1,500 microns, wherein the lost circulation composition has a multimodal particle size distribution, is provided, wherein resilient particles, particles comprising a thermoset polymer laminate, or a combination thereof are present in the lost circulation composition in an amount of at least about 20% by weight of the lost circulation composition, is provided. Drilling fluids, methods of controlling lost circulation, and methods of increasing an effective fracture gradient while drilling also are provided.

    摘要翻译： 一种失去循环的组合物，其包含重量平均粒度小于约20微米的第一部分颗粒，重量平均粒径在约25微米至约400微米范围内的第二部分颗粒，以及 提供了重量平均粒度在约450微米至约1,500微米范围内的颗粒的第三部分，其中所述缺失循环组合物具有多峰粒度分布，其中弹性颗粒包含热固性聚合物层压体的颗粒， 或其组合在损失循环组合物中的含量为至少约20重量％的损失循环组合物的量。 提供钻井液，控制流失的方法以及在钻井时提高有效断裂梯度的方法。

    Oilwell sealant compositions comprising alkali swellable latex
    2.
    发明申请
    Oilwell sealant compositions comprising alkali swellable latex 失效

    公开(公告)号：US20060122071A1

    公开(公告)日：2006-06-08

    申请号：US11010117

    申请日：2004-12-08

    申请人： B. Reddy ,  Mark Savery ,  Krishna Ravi ,  Donald Whitfill

    发明人： B. Reddy ,  Mark Savery ,  Krishna Ravi ,  Donald Whitfill

    IPC分类号： E21B43/00 ,  C09K8/00

    CPC分类号： C09K8/5045 ,  C09K8/506 ,  C09K8/508

    摘要： Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.

    Variable density fluids and methods of use in subterranean formations
    3.
    发明申请
    Variable density fluids and methods of use in subterranean formations 有权
    可变密度流体和地下地层中使用的方法

    公开(公告)号：US20050113262A1

    公开(公告)日：2005-05-26

    申请号：US10721055

    申请日：2003-11-24

    申请人： Krishna Ravi ,  Donald Whitfill ,  B. Reddy

    发明人： Krishna Ravi ,  Donald Whitfill ,  B. Reddy

    IPC分类号： C09K7/00

    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 -9范围内的等温可压缩因子 （1psi）。

    Self-dissolving lost circulation treatment for producing formations
    7.
    发明申请
    Self-dissolving lost circulation treatment for producing formations 有权
    用于生产地层的自溶式流失处理

    公开(公告)号：US20050241827A1

    公开(公告)日：2005-11-03

    申请号：US11088559

    申请日：2005-03-24

    申请人： Donald Whitfill ,  Bradley Todd ,  Trinidad Munoz ,  Ashley Donaldson

    发明人： Donald Whitfill ,  Bradley Todd ,  Trinidad Munoz ,  Ashley Donaldson

    IPC分类号： F16D69/02 ,  E21B33/138

    CPC分类号： C09K8/512

    摘要： Methods and compositions for sealing subterranean zones having temperatures in the range of about 80° F. to about 300° F. are provided. In a method of the invention, a sealing composition of the invention of water, a substantially fully hydrated depolymerized polymer and poly lactic acid, with a pH above about 8.5, is introduced into the subterranean zone wherein it becomes substantially rigid and seals the zone when exposed to subterranean zone temperatures above about 80° F. The methods and compositions are particularly advantageous for use in producing zones because the rigid sealing composition self dissolves over time, freeing the seal and the zone for production of fluids. Moreover, the composition is environmentally compatible.

    摘要翻译： 提供了用于密封温度在约80°F至约300°F范围内的地下区域的方法和组合物。 在本发明的方法中，将本发明的水，基本上完全水合的解聚聚合物和聚乳酸的pH值高于约8.5的密封组合物引入到地下区域中，其中其变得基本上刚性并且当 暴露于高于约80°F的地下区域温度。该方法和组合物特别有利于用于生产区域，因为刚性密封组合物自身随时间溶解，释放密封件和产生流体的区域。 此外，组合物与环境相容。

    Methods of using lost circulation compositions
    9.
    发明申请
    Methods of using lost circulation compositions 有权
    使用迷失循环组合物的方法

    公开(公告)号：US20070169937A1

    公开(公告)日：2007-07-26

    申请号：US11337707

    申请日：2006-01-23

    申请人： Melissa Allin ,  John Dennis ,  Donald Whitfill

    发明人： Melissa Allin ,  John Dennis ,  Donald Whitfill

    IPC分类号： E21B33/138

    CPC分类号： C09K8/5083 ,  C09K8/512

    摘要： A method of servicing a wellbore in contact with a subterranean formation, comprising: placing a wellbore servicing fluid comprising a crosslinkable polymer system and a filler into a lost circulation zone within the wellbore. A method of blocking the flow of fluid through a lost circulation zone in a subterranean formation comprising placing a first composition comprising a packing agent into the lost circulation zone, placing a second composition comprising a crosslinkable polymer system and a filler into the lost circulation zone, and allowing the compositions to set into place.

    摘要翻译： 一种维护与地下地层接触的井眼的方法，包括：将包含可交联聚合物体系和填料的井眼维修流体放置在井筒内的失水循环区域中。 一种阻止流体通过地下地层中的失水循环区的流动的方法，包括将包含填料的第一组合物放入到所述失水循环区中，将包含可交联聚合物体系和填料的第二组合物放入所述流失区中， 并允许组合物放置到位。