| 摘要 |
Present embodiments are directed to a top drive system 40 comprising a hoisting assembly 50 having an upper link 52, a lower link 54, and a first joint 56 coupling the upper link 52 and the lower link 54. The top drive system 40 also includes a main body 58 coupled to the hoisting assembly 50 by a second joint 60, wherein the hoisting assembly 50 is configured to support the main body 58, and the main body 58 is configured to support a tubular 38. Further, the top drive system 40 includes a frame 62 coupled to the main body 58 and a counter moment system 44 configured to apply a force on the first joint 56 to create a bending moment about the second joint 60. |
