公开(公告)号：EP2588709A2

公开(公告)日：2013-05-08

申请号：EP11801341.6

申请日：2011-06-24

申请人： National Oilwell Varco, L.P.

发明人： LIOTTA, Joseph, James ,  ENSLEY, Eric, Trevor ,  JOHNSON, Christopher, Dale

IPC分类号： E21B33/06 ,  E21B47/09

CPC分类号： E21B33/062 ,  E21B33/06 ,  E21B34/16 ,  Y10T137/0318 ,  Y10T137/8175 ,  Y10T137/8225 ,  Y10T137/8242 ,  Y10T137/8292

摘要： A blowout preventer for sealing a tubular of a wellbore is provided. The blowout preventer has a housing having a bore therethrough for receiving the tubular, at least one ram slidably positionable in the housing (each of the rams having a ram block for sealing engagement about the tubular), an actuator for selectively driving the ram block (the actuator comprising a piston slidably positionable in a cylinder), and a monitor for detecting the piston therein. The monitor has a visual indicator on an exterior of the cylinder. The visual indicator is operatively coupled to the piston for displaying a position of the piston as the piston travels within the cylinder whereby a position of the ram may be determined.

摘要翻译： 提供一种用于密封井筒管的防喷器。 防喷器具有壳体，其具有穿过其中的孔，用于容纳可滑动地定位在壳体中的管状的至少一个柱塞（每个柱塞具有用于密封与管状物接合的压头块），用于选择性地驱动压头块的致动器 致动器包括可滑动地定位在气缸中的活塞）和用于检测活塞的监视器。 显示器在气缸外部有一个视觉指示器。 视觉指示器可操作地联接到活塞，用于当活塞在气缸内行进时显示活塞的位置，从而确定压头的位置。

公开(公告)号：EP3122987A1

公开(公告)日：2017-02-01

申请号：EP15715099.6

申请日：2015-03-26

申请人： National Oilwell Varco, L.P.

发明人： LIOTTA, Joseph, James ,  ENSLEY, Eric, Trevor ,  JOHNSON, Christopher, Dale

IPC分类号： E21B33/06 ,  E21B33/064

CPC分类号： E21B33/06 ,  E21B33/0422 ,  E21B33/064

摘要： A blowout preventer includes a housing having a flow path therethrough in fluid communication with a wellbore penetrating a subsurface formation and a sealing assembly positionable in the housing about the flow path. The sealing assembly includes a piston slidably positionable in the housing and a packer element. The packer element includes a plurality of fingers and a packer seal. The fingers include a housing portion and a piston portion. The housing portion is slidably movable along the housing and the piston portion is slidingly movable along the piston. The fingers are engageable by the piston and movable to a sealed position about the flow path, and the packer seal is energized to form a seal about the blowout preventer to seal the wellbore in the subsurface formation.

摘要翻译： 提供了用于密封穿透地下地层的井眼的防喷器和密封组件。 防喷器包括壳体，该壳体具有与井筒流体连通的穿过其的流动通道和可围绕流动路径定位在壳体中的密封组件。 密封组件包括可滑动地定位在壳体中的活塞和封隔器元件。 封隔器元件包括多个指状物和封隔器密封件。 手指包括壳体部分和活塞部分。 壳体部分沿着壳体可滑动地移动，并且活塞部分可沿活塞滑动移动。 手指可以通过活塞接合并且可以围绕流动路径移动到密封位置，由此封隔器密封件通电以形成围绕防喷器的密封。

公开(公告)号：EP2588709B1

公开(公告)日：2018-02-21

申请号：EP11801341.6

申请日：2011-06-24

申请人： National Oilwell Varco, L.P.

发明人： LIOTTA, Joseph, James ,  ENSLEY, Eric, Trevor ,  JOHNSON, Christopher, Dale

IPC分类号： E21B33/06 ,  E21B34/16

CPC分类号： E21B33/062 ,  E21B33/06 ,  E21B34/16 ,  Y10T137/0318 ,  Y10T137/8175 ,  Y10T137/8225 ,  Y10T137/8242 ,  Y10T137/8292

摘要： A blowout preventer for sealing a tubular of a wellbore is provided. The blowout preventer has a housing having a bore therethrough for receiving the tubular, at least one ram slidably positionable in the housing (each of the rams having a ram block for sealing engagement about the tubular), an actuator for selectively driving the ram block (the actuator comprising a piston slidably positionable in a cylinder), and a monitor for detecting the piston therein. The monitor has a visual indicator on an exterior of the cylinder. The visual indicator is operatively coupled to the piston for displaying a position of the piston as the piston travels within the cylinder whereby a position of the ram may be determined.

公开(公告)号：EP3250780A1

公开(公告)日：2017-12-06

申请号：EP16703014.7

申请日：2016-01-18

申请人： National Oilwell Varco, L.P.

发明人： CANTLON, Kyle, Brett ,  LIOTTA, Joseph, James

IPC分类号： E21B33/06

CPC分类号： E21B33/062 ,  E21B33/064 ,  F16K3/0227 ,  F16K3/029 ,  F16K27/044

摘要： The disclosure relates to a seal assembly (230) for a ram of a blowout preventer for sealing a wellbore penetrating a subterranean formation. The wellbore has a tubular to pass fluid therefrom. The rams are positionable about the tubular. The seal assembly includes a compound seal carried by the ram. The compound seal includes a face seal (454) having a sealing surface (337) sealingly engageable about the tubular and a support seal (456) positionable adjacent to the face seal a distance from the sealing surface. The sealing surface extends along a front face thereof engageable with at least one of the tubular and the face seal of another ram. The support seal is non- engageable with the tubular during sealing and is more deformable than the face seal whereby the compound seal is supported during sealing.