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公开(公告)号：US5890540A
公开(公告)日：1999-04-06
申请号：US675922
申请日：1996-07-05
CPC分类号： E21B23/006 , E21B21/10 , E21B34/10
摘要： A downhole tool comprises a tubular body (12) for location in a tubular member, such as a drill string, and defines a through bore (20) and a number of circumferentially spaced ports (26). A valve member which may be in the form of a piston sleeve (24) is mounted in the bore (20) and is movable relative to the body (12) between a first position in which fluid may flow through the port (26) and a second position in which the valve member (24) closes the port (26), the valve member being movable between the first and second positions by application of differential fluid pressure. Movement of the valve member (24) is provided by a cam arrangement including a circumferentially extending cam groove (56) and a cam follower (57).
摘要翻译： 井下工具包括用于定位在管状构件（例如钻柱）中并且限定通孔（20）和多个周向间隔开的端口（26）的管状体（12）。 可以是活塞套（24）形式的阀构件安装在孔（20）中并且可在第一位置和第二位置之间相对于主体（12）移动，第一位置中流体可以流过端口（26）和 阀构件（24）关闭端口（26）的第二位置，阀构件通过施加差动流体压力在第一和第二位置之间移动。 阀构件（24）的移动由包括周向延伸的凸轮槽（56）和凸轮从动件（57）的凸轮装置提供。
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公开(公告)号：US20110308804A1
公开(公告)日：2011-12-22
申请号：US13159764
申请日：2011-06-14
CPC分类号： E21B43/124 , B01F3/12 , B01F5/0463 , E21B43/29
摘要： A downhole mixing tool and method for removing sand and other debris from a wellbore which combines the sand with a treatment fluid so that the sand is lifted to the surface of the well for removal. The tool includes a chamber into which the sand laden fluid is drawn and the treatment fluid is introduced. Ports into the chamber are arranged to provide a pressure drop to draw the sand laden fluid into the chamber and a mixing time within the chamber before sand laden fluid of lower viscosity exits the chamber to travel to the surface. Additional features include blades on the tool for breaking up obstructions prior to being drawn into the chamber and a lubricating line through the tool to introduce lubricating fluid to the blades.
摘要翻译： 一种井下混合工具和从井筒中除去沙子和其他碎屑的方法，其将砂与处理液结合在一起，以使砂被提升到井的表面以除去。 该工具包括一个腔室，吸入含沙液体并引入处理流体。 进入腔室的端口被布置成提供压降以将含沙的流体吸入腔室中，并且在较低粘度的含沙流体离开腔室之前在腔室内的混合时间移动到表面。 附加特征包括刀具上的刀片，用于在被吸入腔室之前破坏障碍物，以及通过该工具的润滑管线将润滑流体引入刀片。
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公开(公告)号：US5853054A
公开(公告)日：1998-12-29
申请号：US836534
申请日：1997-07-22
CPC分类号： E21B10/567 , E21B10/322 , E21B10/5673 , E21B17/10 , E21B47/091
摘要： A 2-stage underreamer for use in a subterranean wellbore includes a unitary body having upper and lower blades mounted in slots formed perpendicular to each other in the body. Separate upper and lower piston assemblies are provided for driving the blades respectively from a storage configuration in which they are located substantially completely within the slots to a use position. The blades each include a steel arm having mounted thereon a base of tungsten nickel cobalt matrix in which diamond and/or tungsten carbide inserts are provided. A signal is given to the surface that the blades are in their extended position by changing the mud.
摘要翻译： PCT No.PCT / GB95 / 02540 Sec。 371日期1997年7月22日 102（e）日期1997年7月22日PCT提交1995年10月31日PCT公布。 公开号WO96 / 13648 日期1996年5月9日在地下井眼中使用的两级扩孔器包括一体的单体，其具有安装在身体中彼此垂直形成的槽中的上下叶片。 提供了分离的上部和下部活塞组件，用于分别从它们基本上完全位于槽内的存储构造到用于使用位置的驱动叶片。 刀片各自包括钢臂，其上安装有钨镍钴基体的基底，其中提供金刚石和/或碳化钨刀片。 通过改变泥浆，给刀片处于伸展位置的信号。
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4.发明授权
公开(公告)号：US5819353A
公开(公告)日：1998-10-13
申请号：US698450
申请日：1996-08-30
IPC分类号： E21B37/02
CPC分类号： E21B37/02
摘要： A tool for the cleaning and conditioning of tubular structures, such as well casings, comprises a central mandrel (1) upon which are mounted a plurality of interchangeable sleeves (4-9). The sleeves at each end bear stabilization elements enabling the tool to be used in a well casing of any disposition and the intermediate sleeves bear conditioning or cleaning elements (12) angularly spaced apart and separated by fluid channels (13), the cleaning elements of adjacent sleeves being off-set to form a substantially helical pattern of cleaning elements and channels to ensure 360.degree. of coverage as a tool is axially displaced within a well casing. The sleeves are mounted in such a way that relative rotation between them and the mandrel is prevented by a combination of keyways and of drive faces between adjacent sleeves formed by cut-away portions.
摘要翻译： 用于清洁和调节管状结构（例如井套）的工具包括中心心轴（1），在其上安装有多个可互换的套筒（4-9）。 每个端部的套筒承受稳定元件，使得该工具能够用于任何布置的井套管中，并且中间套筒承受由流体通道（13）成角度地隔开并分开的调节或清洁元件（12），相邻的清洁元件 袖子被设置成形成清洁元件和通道的大致螺旋形图案，以确保在工具在井套管内轴向移位时的360°的覆盖范围。 套筒以这样一种方式安装，使得它们与心轴之间的相对旋转通过键槽和由切除部分形成的相邻套筒之间的驱动面的组合来防止。
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