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公开(公告)号：US07677315B2
公开(公告)日：2010-03-16
申请号：US11244345
申请日：2005-10-05
IPC分类号： E21B43/26
CPC分类号： B01F17/0028 , B01F17/005 , C09K8/604 , C09K8/68 , C09K8/72 , C09K8/74
摘要： The present invention provides a method of generating an acid downhole that comprise providing a degradable surfactant; introducing the degradable surfactant into a well bore that penetrates a subterranean formation; and allowing at least a portion of the degradable surfactant to degrade, thereby releasing an acid. Also provided are methods of degrading an acid-soluble component present within a subterranean formation, and methods of reducing the viscosity of a viscosified treatment fluid.
摘要翻译： 本发明提供一种产生酸性井下的方法，其包括提供可降解的表面活性剂; 将可降解表面活性剂引入穿透地层的井眼中; 并使至少一部分可降解表面活性剂降解，从而释放酸。 还提供了降解存在于地层内的酸溶性组分的方法以及降低稠化处理流体的粘度的方法。
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2.发明授权公开(公告)号：US08541051B2
公开(公告)日：2013-09-24
申请号：US10736339
申请日：2003-12-15
申请人： Rajesh K. Saini , Bradley L. Todd
发明人： Rajesh K. Saini , Bradley L. Todd
摘要： The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for degrading filter cake deposited on a subterranean formation. One embodiment of the present invention provides a method of creating particulates coated with acid-releasing degradable material on-the-fly comprising the step of: combining an acid-releasing degradable material with a solvent or a plasticizer to create a coating solution; and, coating the coating solution onto a particulate on-the-fly to create coated particulates. Another embodiment of the present invention provides a gravel pack comprising gravel particles coated on-the-fly with an acid-releasing degradable material.
摘要翻译： 本发明涉及用于处理地下地层的方法和组合物，更具体地说，涉及降解沉积在地层上的滤饼的改进方法和组合物。 本发明的一个实施方案提供了一种在真空下产生涂有释放酸的可降解材料的颗粒的方法，包括以下步骤：将释放酸的可降解材料与溶剂或增塑剂组合以产生涂布溶液; 并将该涂层溶液涂覆在颗粒上以形成涂覆的微粒。 本发明的另一个实施方案提供了一种砾石充填包，其中包含用脱酸剂降解材料在飞行中涂覆的砾石颗粒。
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公开(公告)号：US20130081801A1
公开(公告)日：2013-04-04
申请号：US13252403
申请日：2011-10-04
申请人： Feng Liang , Bradley L. Todd , Thomas D. Welton , Rajesh K. Saini
发明人： Feng Liang , Bradley L. Todd , Thomas D. Welton , Rajesh K. Saini
摘要： The present invention relates to the use of degradable coatings suitable for use on downhole tools. In particular, the present invention relates to pliable coatings for use on downhole tools that have been designed to be able to resist flaking or breaking off of the tool in response to a physical shock. Some embodiments of the present invention provide methods of reacting lactic acid, glycolic acid, or a combination thereof in a polymerization reaction to form a degradable polymer; combining the degradable polymer and a plasticizer to form a coating composition; applying the coating composition to a downhole tool; placing the coated downhole tool into a portion of a subterranean formation; and, hydrolyzing the degradable polymer of the coating composition to release an acid and degrade the coating.
摘要翻译： 本发明涉及适用于井下工具的可降解涂料的应用。 特别地，本发明涉及用于井下工具的柔性涂层，其被设计成能够抵抗物理冲击而抵抗工具的剥落或破裂。 本发明的一些实施方案提供了在聚合反应中使乳酸，乙醇酸或其组合反应形成可降解聚合物的方法; 组合可降解聚合物和增塑剂以形成涂料组合物; 将涂料组合物施加到井下工具; 将涂覆的井下工具放置在地层的一部分中; 并且水解涂料组合物的可降解聚合物以释放酸并降解涂层。
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公开(公告)号：US20080035342A1
公开(公告)日：2008-02-14
申请号：US11502285
申请日：2006-08-10
摘要： Methods of acidizing subterranean formations or well bores, and more specifically, to acidizing systems involving acid-generating fluids that comprise acid-generating compounds and associated methods are provided. An example of a method of the present invention comprises: providing an acid-generating fluid that comprises an acid-generating compound; placing the acid-generating fluid into a well bore penetrating a subterranean formation; and allowing the acid-generating compound to produce an acid that then acidizes at least a portion of the subterranean formation or damage contained in the formation or well bore.
摘要翻译： 提供酸化地下地层或井眼的方法，更具体地说，涉及包含酸产生化合物和相关方法的产酸流体的酸化体系。 本发明的方法的一个实例包括：提供包含产酸化合物的产酸流体; 将产酸流体置于贯穿地下地层的井眼中; 并且允许产酸化合物产生一种酸，然后酸化至少一部分地层或包含在地层或井眼中的损伤。
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5.发明授权Methods of fluid loss control, diversion, and sealing using deformable particulates 有权使用可变形颗粒的流体损失控制，引流和密封方法公开(公告)号：US08936086B2
公开(公告)日：2015-01-20
申请号：US13252349
申请日：2011-10-04
申请人： Feng Liang , Bradley L. Todd , Thomas D. Welton , Rajesh K. Saini
发明人： Feng Liang , Bradley L. Todd , Thomas D. Welton , Rajesh K. Saini
摘要： Method including the steps of providing a treatment fluid that comprises a base fluid and polymeric particulates and introducing the treatment fluid into a subterranean formation having a temperature above about 65° C. The polymeric particulates comprise a degradable polymer and a plasticizer and exhibit a Tg above about −15° C. When the polymeric particulates are placed into a subterranean formation having a temperature above about 65° C. they transform from rigid form to malleable form and are able to provide fluid loss, seal the rock surfaces for fluid diversion, or plug an area along the annulus of a well bore. The malleable particulates then degrade over time in the subterranean formation.
摘要翻译： 方法包括提供包括基础流体和聚合物颗粒的处理流体并将处理流体引入温度高于约65℃的地下地层的步骤。聚合物颗粒包含可降解聚合物和增塑剂并且显示Tg高于 约-15℃。当将聚合物颗粒置于温度高于约65℃的地下地层中时，它们从刚性形式转变为可延展形式并且能够提供流体损失，密封岩石表面用于流体分流，或 沿着井眼的环带堵塞一个区域。 然后随着时间的推移，可延展的颗粒在地层中降解。
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公开(公告)号：US08720555B2
公开(公告)日：2014-05-13
申请号：US13252373
申请日：2011-10-04
申请人： Feng Liang , Bradley L. Todd , Rajesh K. Saini , Stanley J. Heath
发明人： Feng Liang , Bradley L. Todd , Rajesh K. Saini , Stanley J. Heath
IPC分类号： E21B43/25 , E21B43/267 , C09K8/80
摘要： A method for diverting fluids across a perforation tunnel in high-rate water pack operations may include providing a wellbore extending into a subterranean formation, wherein a perforation tunnel provides a fluid connection between the wellbore and the subterranean formation; providing a diverting particulate that comprises a degradable plasticized polymer coating on a particulate; placing the diverting particulate into the perforation tunnel, wherein the step of placing the diverting particulate forms a particulate pack within the subterranean formation and the perforation tunnel; allowing the degradable plasticized polymer coating to deform and fill the interstitial spaces within the particulate pack in the perforation tunnel such that the fluid conductivity between the wellbore and the subterranean formation is substantially blocked; and allowing the plasticized polymer coating to degrade over time thereby substantially restoring the fluid conductivity between the wellbore and the subterranean formation.
摘要翻译： 在高速水包装操作中将流体转移穿过穿孔隧道的方法可以包括提供延伸到地下地层中的井眼，其中穿孔在井筒和地下地层之间提供流体连接; 提供包含颗粒上的可降解塑化聚合物涂层的转向颗粒; 将转向颗粒放置到穿孔隧道中，其中放置转向颗粒的步骤在地层和穿孔隧道内形成颗粒状包装; 允许可降解塑化聚合物涂层变形并填充穿孔隧道内的颗粒包装内的间隙空间，使得井筒和地下地层之间的流体传导性基本上被阻挡; 并且允许塑化的聚合物涂层随着时间的推移而降解，从而基本上恢复井筒和地下地层之间的流体传导性。
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7.发明申请Methods of Fluid Loss Control, Diversion, and Sealing Using Deformable Particulates 有权使用可变形颗粒的流体损失控制，引流和密封方法公开(公告)号：US20130081813A1
公开(公告)日：2013-04-04
申请号：US13252349
申请日：2011-10-04
申请人： Feng Liang , Bradley L. Todd , Thomas D. Welton , Rajesh K. Saini
发明人： Feng Liang , Bradley L. Todd , Thomas D. Welton , Rajesh K. Saini
IPC分类号： E21B43/22
摘要： Method including the steps of providing a treatment fluid that comprises a base fluid and polymeric particulates wherein the polymeric particulates comprise a degradable polymer and a plasticizer and exhibit a Tg above about −15° C.; introducing the treatment fluid into a subterranean formation having a temperature above about 65° C. such that the particulates transform from rigid to malleable form and are able to provide fluid loss, seal the rock surfaces for fluid diversion, or plug an area along the annulus of a well bore; and, degrading the malleable particulates over time in the subterranean formation.
摘要翻译： 方法包括提供包含基础流体和聚合物颗粒的处理流体的步骤，其中聚合物颗粒包含可降解聚合物和增塑剂，并且具有高于约-15℃的Tg。 将处理流体引入具有高于约65℃的温度的地下地层，使得颗粒从刚性变形为可延展形式并且能够提供流体损失，密封岩石表面用于流体分流，或者沿着环形空间 的井眼; 并且在地下地层中随着时间的推移降解可延展的颗粒物。
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8.发明申请Degradable Fluid Sealing Compositions Having an Adjustable Degradation Rate and Methods for Use Thereof 审中-公开可降解流体密封组合物具有可调节的降解速率及其使用方法公开(公告)号：US20130233546A1
公开(公告)日：2013-09-12
申请号：US13414269
申请日：2012-03-07
申请人： Feng Liang , Rajesh K. Saini , Bradley L. Todd , Stanley J. Heath
发明人： Feng Liang , Rajesh K. Saini , Bradley L. Todd , Stanley J. Heath
IPC分类号： E21B33/00
摘要： When performing subterranean treatment operations, it can be desirable to temporarily divert or block fluid flow by forming a degradable fluid seal. Methods for forming a degradable fluid seal can comprise: providing a sealing composition comprising: a degradable polymer, and a water-soluble material comprising a first portion and a second portion of rigid particulates, each portion having a sealing time and a particulate size distribution associated therewith, the particulate size distributions of the first portion and the second portion differing from one another; determining an amount of the first portion relative to the second portion needed to produce a degradable fluid seal having a desired sealing time that is different than that of the sealing time of either the first portion or the second portion; introducing the sealing composition into a subterranean formation; and allowing the sealing composition to form a degradable fluid seal in the subterranean formation.
摘要翻译： 当进行地下处理操作时，可以期望通过形成可降解流体密封来临时转移或阻止流体流动。 用于形成可降解流体密封件的方法可以包括：提供密封组合物，其包含：可降解聚合物和包含刚性颗粒的第一部分和第二部分的水溶性材料，每个部分具有密封时间和相关的颗粒尺寸分布 由此，第一部分和第二部分的颗粒尺寸分布彼此不同; 确定产生具有与第一部分或第二部分的密封时间不同的期望密封时间的可降解流体密封件所需的相对于第二部分的第一部分的量; 将密封组合物引入地层; 并且允许密封组合物在地层中形成可降解的流体密封。
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9.发明申请公开(公告)号：US20120189771A1
公开(公告)日：2012-07-26
申请号：US13435400
申请日：2012-03-30
申请人： Rajesh K. Saini , Bradley L. Todd
发明人： Rajesh K. Saini , Bradley L. Todd
IPC分类号： B05D1/18
摘要： Methods of creating particulates coated with acid-releasing degradable material comprising the steps of: combining an acid-releasing degradable material with a solvent or a plasticizer to create a coating solution; providing a first flowing stream comprising the coating solution; providing a second flowing stream comprising particulates; and, combining the first and second flowing streams to create a third flowing stream comprising particulates coated with the coating solution. Wherein the acid-releasing degradable material comprises at least one acid-releasing degradable material selected from the group consisting of: poly(orthoester); a lactide, a poly(lactide); a glycolide; a poly(glycolide); a poly(ε-caprolactone); a poly(hydroxybutyrate); a substantially water insoluble anhydride; a poly(anhydride); a poly(amino acid); a copolymer of two or more of the above-listed compounds; and any combination thereof.
摘要翻译： 制备涂有释放酸的可降解材料的颗粒的方法，包括以下步骤：将释放酸的可降解材料与溶剂或增塑剂结合以产生涂布溶液; 提供包含所述涂布溶液的第一流动流; 提供包含微粒的第二流动流; 以及组合第一和第二流动流以产生包含涂覆有涂层溶液的微粒的第三流动流。 其中所述释放酸的可降解材料包含至少一种选自以下的释放酸的可降解材料：聚（原酸酯）; 丙交酯，聚（丙交酯）; 乙交酯; 聚（乙交酯）; 聚（ε-己内酯）; 聚（羟基丁酸酯）; 基本上不溶于水的酸酐; 聚（酸酐）; 聚（氨基酸）; 两种或更多种上述化合物的共聚物; 及其任何组合。
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公开(公告)号：US07921912B2
公开(公告)日：2011-04-12
申请号：US11502284
申请日：2006-08-10
IPC分类号： E21B43/25
CPC分类号： C09K8/72
摘要： Methods of acidizing subterranean formations or well bores, and more specifically, to acidizing systems involving acid-generating fluids that comprise acid-generating compounds and associated methods are provided. An example is a method that comprises: providing an acid-generating fluid that comprises an acid-generating compound; placing the acid-generating fluid into a subterranean formation; and allowing an acid to generate from the acid-generating fluid.
摘要翻译： 提供酸化地下地层或井眼的方法，更具体地说，涉及包含产酸化合物和相关方法的产酸流体的酸化体系。 一个实例是一种方法，其包括：提供包含酸产生化合物的产酸流体; 将产酸流体置于地层中; 并且允许酸从产酸流体产生。
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