In one embodiment, a top drive system includes a quill; a motor operable to rotate the quill; a gripper operable to engage a joint of casing; a connector bi-directionally rotationally coupled to the quill and the gripper and longitudinally coupled to the gripper; and a compensator longitudinally coupled o the quill and the connector. The compensator is operable to allow relative longitudinal movement between the connector and the quill.
申请公布号
EP2450524(A1)
申请公布日期
2012.05.09
申请号
EP20120153779
申请日期
2008.12.12
申请人
WEATHERFORD/LAMB, INC.
发明人
HEIDECKE, KARSTEN;RIALS, ROSS;FISHER, RALEIGH;OLSTAD, DELANEY MICHAEL