公开(公告)号：US20150368985A1

公开(公告)日：2015-12-24

申请号：US14767980

申请日：2014-02-11

申请人： Smith Internatinal, Inc.

发明人： Jay M. Eppink

IPC分类号： E21B17/03 ,  E21B4/02 ,  E21B7/00 ,  E21B3/00

CPC分类号： E21B17/03 ,  E21B3/00 ,  E21B4/003 ,  E21B4/02 ,  E21B7/00

摘要： It is desirable to secure a lower end of a down hole assembly in the event of a down hole failure, such as a fractured drive shaft, enabling recovery of the bottom hole assembly and drill bit. To secure the lower end of the down hole assembly, a catch apparatus according to embodiments herein may be used, the catch apparatus including a rotating bearing having a distal end threadably coupled to a distal portion of a drive shaft. The apparatus may also include a stationary bearing having a proximal end threadably coupled to a distal end of an outer housing. A catch ring may be threadably coupled to a proximal end of the rotating bearing, the catch ring having a shoulder radially overlapping a shoulder of the stationary bearing.

摘要翻译： 在井下故障的情况下（例如断裂的驱动轴）可以固定井下组件的下端，从而能够恢复井底组件和钻头。 为了固定井下组件的下端，可以使用根据本文实施例的捕获装置，捕获装置包括旋转轴承，其具有螺纹连接到驱动轴的远侧部分的远端。 该装置还可以包括固定轴承，其具有可与外壳的远端螺纹连接的近端。 止动环可以螺纹连接到旋转轴承的近端，该止动环具有径向地与固定轴承的肩部重叠的肩部。