专利检索 ap:("Schlumberger Holdings Limited") AND inv:"SCHIEL, Mark" 第 1 页

1.

发明授权
FLAPPER VALVE 有权

公开(公告)号：EP2671006B1

公开(公告)日：2020-03-25

申请号：EP12746616.7

申请日：2012-02-13

申请人： Schlumberger Holdings Limited

发明人： MACRAE, Jonathan , FINCI, Bulent , PEDRAZA, Jaime , SCHIEL, Mark , PORTER, Robert, Crispin

IPC分类号： E21B34/06 , F16K15/03

2.

发明公开
FLAPPER VALVE 审中-公开
标题翻译：拍门

公开(公告)号：EP2671006A2

公开(公告)日：2013-12-11

申请号：EP12746616.7

申请日：2012-02-13

申请人： Schlumberger Holdings Limited

发明人： MACRAE, Jonathan , FINCI, Bulent , PEDRAZA, Jaime , SCHIEL, Mark , PORTER, Robert, Crispin

IPC分类号： F16K1/18 , F16K3/04

CPC分类号： E21B34/06 , E21B2034/005 , F16K15/033 , Y10T137/7898

摘要： A flapper valve includes a valve body, a valve cover pivotally coupled to the valve body at a hinge between an open and closed position, and a biasing element biasing the valve cover to the closed position. The valve cover includes an interior face comprising a sealing surface and a boss including a face surrounded by a beveled edge joining the boss with the sealing surface.