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
EP2957708(A1)
申请公布日期
2015.12.23
申请号
EP20150166062
申请日期
2008.12.12
申请人
WEATHERFORD TECHNOLOGY HOLDINGS, LLC
发明人
HEIDECKE, KARSTEN;RIALS, ROSS;FISHER, RALEIGH;OLSTAD, DELANEY MICHAEL