公开(公告)号：EP2817475A1

公开(公告)日：2014-12-31

申请号：EP13751961.7

申请日：2013-02-21

申请人： Smith International, Inc.

发明人： DEWEY, Charles H. ,  CAMPBELL, John E. ,  SWADI, Shantanu N. ,  GREGUREK, Philip M.

IPC分类号： E21B7/08 ,  E21B17/03

CPC分类号： E21B7/061 ,  E21B17/06 ,  E21B23/04 ,  E21B33/13 ,  E21B33/14

摘要： A system and method facilitate sidetracking by eliminating one or more trips downhole. A sidetracking system includes a whipstock assembly and a stinger assembly. The stinger assembly has a stinger which extends at least partially through the whipstock assembly. The stinger is coupled to a sub of the sidetracking system by a releasable latch mechanism, such as a shear pin or collet.

摘要翻译： 系统和方法通过消除一个或多个井下行程来促进侧钻。 侧钻系统包括造斜器组件和托管架组件。 托管架组件具有至少部分地延伸穿过造斜器组件的托管架。 托管通过可释放的锁定机构（例如剪切销或夹头）连接到侧轨系统的子系统。

公开(公告)号：EP2681397A2

公开(公告)日：2014-01-08

申请号：EP12768548.5

申请日：2012-04-05

申请人： Smith International, Inc.

发明人： GREGUREK, Philip M. ,  SWADI, Shantanu N. ,  DEWEY, Charles H. ,  ALSUP, Shelton W.

IPC分类号： E21B7/08 ,  E21B29/06

CPC分类号： E21B7/061 ,  E21B7/067

摘要： A system and method facilitate drilling of a lateral wellbore by eliminating one or more trips downhole. The system comprises a drill bit optimized for the drilling operation. The drill bit is coupled to a whipstock via a connector, which minimizes interference with the cutting elements of the drill bit. The connector includes a separation device which facilitates disconnection of the drill bit from the whipstock after the whipstock is anchored at a desired downhole location. The separation device is disposed in the connector to minimize the remaining portions of the connector existing after separation of the drill bit from the whipstock which must be milled by the drill bit prior to drilling the lateral wellbore.