| 摘要 |
A top drive coupler (300) with a body (302) that houses a clutch apparatus (310). The body (302) has a lower threaded end (304). An input shaft (312) has a lower end (314) with bearing recesses (316) for bearings (318), a portion of which also resides in the recesses (317) of the body (302). The coupler (300) provides for the selective rotation of an item connected beneath it by the selective engagement of the clutch apparatus and may be used, e.g., with any top drive casing make-up system, including those according to the present invention. A coupler (300) may be used to selectively increase, reduce, or stop the transmission of torque from the top drive to the torque head and/or other top drive driven devices, e.g. but not limited to tubular torque transmission devices; milling apparatuses and systems; drilling apparatuses and systems; and/or external or internal tubular gripping devices. |
