公开(公告)号：US06598682B2

公开(公告)日：2003-07-29

申请号：US09797209

申请日：2001-03-01

申请人： Ashley B. Johnson ,  James E. Brooks ,  Lawrence A. Behrmann ,  Adinathan Venkitaraman ,  Ian Walton ,  Anthony P. Vovers ,  Vladimir Vaynshteyn ,  Dinesh R. Patel ,  Michael W. Fruge

发明人： Ashley B. Johnson ,  James E. Brooks ,  Lawrence A. Behrmann ,  Adinathan Venkitaraman ,  Ian Walton ,  Anthony P. Vovers ,  Vladimir Vaynshteyn ,  Dinesh R. Patel ,  Michael W. Fruge

IPC分类号： E21B2900

CPC分类号： E21B43/04 ,  E21B21/00 ,  E21B37/08 ,  E21B43/1195 ,  E21B43/26 ,  E21B49/08 ,  E21B2021/006 ,  E21B2034/002

摘要： A method and apparatus for improving reservoir communication includes, in one arrangement, use of one or more chambers to create an underbalance condition and/or a fluid surge in the wellbore. In another arrangement, a tool string comprises a packer, a circulating valve, and an atmospheric chamber, in which the circulating valve, when open, is adapted to vent a lower wellbore region below the packer when the packer is set, and the atmospheric chamber is capable of being operated to create an underbalance condition below the packer. In yet another arrangement, an apparatus comprises a subsea wellhead equipment including a blow-out preventer, choke line filled with a low density fluid, and a kill line filled with a heavy fluid. The choke line is adapted to be opened to create an underbalance condition in the wellbore. In yet another arrangement, a method of creating an underbalance condition comprises controlling wellbore pressure at least in a perforating interval to achieve a target level, configuring a perforating gun to achieve a target detonation pressure in the perforating gun upon detonation, and creating an underbalance condition in the perforating interval of the wellbore when the perforating gun is shot. In yet another arrangement, a tool string for use in a wellbore extending from a well surface comprises a closure member adapted to be positioned below the well surface, and a chamber defined at least in part by the closure member. The tool string further comprises at least a port selectively openable to enable communication between the chamber and a wellbore region. The port when open creates a fluid surging to the chamber to provide a low pressure condition in the wellbore region. A tool in the tool string is adapted to perform an operation in the low pressure condition.

公开(公告)号：US06244351B1

公开(公告)日：2001-06-12

申请号：US09480083

申请日：2000-01-10

申请人： Dinesh R. Patel ,  Anthony P. Vovers

发明人： Dinesh R. Patel ,  Anthony P. Vovers

IPC分类号： E21B3410

CPC分类号： E21B23/06

摘要： A well string for use in a wellbore having plural fluid regions includes a flow conduit having an inner bore defining one of the fluid regions and an actuating assembly including an operator mechanism, an activation port in communication with the operator mechanism, and a member adapted to block the activation port. The member is moveable by an applied pressure in a first fluid region to expose the activation port to a second fluid region. The operator mechanism includes a piston assembly. The first fluid region may include the annulus region outside the flow conduit, and the second fluid region may include the flow conduit inner bore.

摘要翻译： 用于具有多个流体区域的井筒中的井柱包括具有限定流体区域中的一个的内孔的流动导管和包括操作机构的致动组件，与操作机构连通的活动端口，以及适于 阻止激活端口。 所述构件可通过施加的压力在第一流体区域中移动，以将活化端口暴露于第二流体区域。 操作机构包括活塞组件。 第一流体区域可以包括流动管道外部的环形区域，并且第二流体区域可以包括流动管道内孔。

公开(公告)号：US06588508B2

公开(公告)日：2003-07-08

申请号：US09920430

申请日：2001-08-01

申请人： Robert A. Parrott ,  Haoming Li ,  Anthony P. Vovers ,  Cynthia L. Hickson ,  Harry B. Anderson ,  John M. Corben

发明人： Robert A. Parrott ,  Haoming Li ,  Anthony P. Vovers ,  Cynthia L. Hickson ,  Harry B. Anderson ,  John M. Corben

IPC分类号： E21B43116

CPC分类号： E21B43/119

摘要： A tool string for use in a well includes a filter sub (or trapped pressure regulator sub) that is used with other components to reduce trapped pressure. The filter sub filters out debris that may occur from various types of downhole operations, such as perforating operations. By filtering out larger debris, only gases, liquids, and smaller particles are allowed to enter various components of the tool string. Without the presence of larger solid debris inside certain components of the tool string, the likelihood of plugs being formed is reduced so that gases and liquids can more readily pass out of the tool string as the tool string is retrieved to the surface of the well and the well hydrostatic pressure decreases.

公开(公告)号：US06293344B1

公开(公告)日：2001-09-25

申请号：US09362784

申请日：1999-07-28

申请人： Vance E. Nixon ,  Gary L. Rytlewski ,  Anthony P. Vovers

发明人： Vance E. Nixon ,  Gary L. Rytlewski ,  Anthony P. Vovers

IPC分类号： E21B3402

CPC分类号： E21B34/045

摘要： An apparatus for retaining fluid in a pipe includes an elongated body adapted to be positioned within a subsea wellhead assembly. The elongated body has an end adapted for connection to the pipe, a flow passage for fluid communication with the pipe, and an outer surface for engagement with a sealing member in the subsea wellhead assembly. A first chamber is defined within the elongated body and connected to receive pressure from above the subsea wellhead assembly. A second chamber is defined within the elongated body and connected to receive pressure from below the subsea wellhead assembly. A valve is supported in the elongated body for movement in response to pressure differential between the first and the second chambers. The valve is movable between an open position to permit fluid flow through the flow passage and a closed position to prevent fluid flow through the flow passage.

摘要翻译： 用于将流体保持在管道中的装置包括适于定位在海底井口组件内的细长体。 细长主体具有适于连接到管的端部，用于与管道流体连通的流动通道，以及用于与海底井口组件中的密封构件接合的外表面。 第一腔室被限定在细长体内并被连接以从海底井口组件的上方接受压力。 第二室被限定在细长主体内并连接以从海底井口组件下方接收压力。 阀被支撑在细长体中，用于响应于第一和第二腔室之间的压力差运动。 阀可以在打开位置之间移动，以允许流体流过流动通道和关闭位置，以防止流体流过流动通道。

公开(公告)号：US5320183A

公开(公告)日：1994-06-14

申请号：US963302

申请日：1992-10-16

申请人： Laurent E. Muller ,  Anthony P. Vovers

发明人： Laurent E. Muller ,  Anthony P. Vovers

IPC分类号： E21B23/00 ,  E21B23/06 ,  E21B33/129

CPC分类号： E21B23/006 ,  E21B23/06 ,  E21B33/1291

摘要： A locking apparatus which includes a rupture disc, prevents a packer from setting while being lowered into a wellbore. When the rupture disc ruptures, the packer can then set. The locking apparatus includes a locking sleeve for holding a locking dog into a locking recess in a mandrel. A drag block is locked to the mandrel as long as the locking dog is held into the locking recess of the mandrel. A packer connected to the mandrel is prevented from setting as long as the drag block is locked to the mandrel. Pressure in an annulus around the locking sleeve increases until it exceeds a predetermined threshold pressure value. When the annulus pressure exceeds the threshold pressure value, a rupture disc in the locking sleeve ruptures thereby allowing the annulus pressure to enter a chamber and move the locking sleeve away from the locking dog. When the locking sleeve moves away from the locking dog, any subsequent longitudinal movement of the mandrel moves the locking dog out of its locking recess. When the locking dog moves out of its locking recess, a sleevlet, connected to the locking dog, moves in the same direction as the locking dog thereby filling the locking recess originally occupied by the locking dog. When the sleevlet fills the locking recess, it is ratcheted in place thereby permanently filling the locking recess. When the locking recess is permanently filled, the lock is permanently removed. Therefore, the mandrel is free to move longitudinally relative to the drag block. As a result, the packer can be either set or unset simply by moving the mandrel longitudinally in the wellbore.

摘要翻译： 包括破裂盘的锁定装置防止封隔器在下降到井筒中时固定。 当破裂盘破裂时，封隔器可以安装。 锁定装置包括用于将锁定爪保持在心轴中的锁定凹部中的锁定套筒。 只要锁定爪固定在心轴的锁定凹槽中，阻力块就被锁定到心轴上。 只要拖动块被锁定到心轴上，就防止连接到心轴的封隔器设置。 围绕锁定套筒的环形空间中的压力增加，直到其超过预定阈值压力值。 当环空压力超过阈值压力值时，锁定套筒中的破裂盘破裂，从而允许环空压力进入腔室并使锁定套筒远离锁定爪。 当锁定套筒从锁定爪移开时，心轴的任何随后的纵向移动将锁定爪移出其锁定凹槽。 当锁定爪从其锁定凹槽移出时，连接到锁定爪的袖子沿与锁定爪相同的方向移动，从而填充由锁定狗最初占据的锁定凹部。 当套筒填充锁定凹槽时，其被棘轮固定就位，从而永久地填充锁定凹部。 当锁定凹槽被永久填充时，锁永久地被移除。 因此，心轴相对于阻力块自由地纵向移动。 因此，封隔器可以简单地通过在井筒中纵向移动心轴来设定或不设置。