| 摘要 |
Present embodiments are directed to a top drive system comprising a hoisting assembly having an upper link, a lower link, and a first joint coupling the upper link and the lower link. The top drive system also includes a main body coupled to the hoisting assembly by a second joint, wherein the hoisting assembly is configured to support the main body, and the main body is configured to support a tubular. Further, the top drive system includes a frame coupled to the main body and a counter moment system configured to apply a force on the first joint to create a bending moment about the second joint. |
