公开(公告)号：US11002082B2

公开(公告)日：2021-05-11

申请号：US15737803

申请日：2016-06-16

申请人： Wellbore Integrity Solutions LLC

发明人： Shantanu N. Swadi ,  Charles H. Dewey ,  Tuan Anh Nguyen ,  John Edward Campbell ,  Shelton W Alsup

IPC分类号： E21B7/06 ,  E21B17/02 ,  E21B29/00 ,  E21B23/01

摘要： A departure device couples to a bit using a connector that facilitates release of the bit from the departure device. The connector may be more millable than the departure device and can transmit axial and torque loads between the bit and the departure device. The connector may include a material having lesser strength or hardness than the departure device, and may be millable by the bit. Another example connector may have connection points with the bit, and a movable member of the departure device may a force to the connector and contribute to releasing the connection between the bit and the departure device. A tensile connector between the bit and the movable member may apply a tension force to the movable member, urging the movable member toward an extended position in which the movable member is aligned coherently with a sloped face of the departure device.