| 摘要 |
A force compensator for a top drive assembly includes a carrier block, a pair of top drive link assemblies, a mandrel, and a shock absorber assembly. The top drive link assemblies being positionable on either side of a power swivel and having a lower end connectable to the power swivel, an upper end connected to the carrier block, and being slidably positionable on a derrick of a drilling rig. The mandrel is slidably disposed through the carrier block and has an upper end connectable to a mover assembly of the drilling rig. The shock absorber assembly is interposed between the carrier block and a lower end of the mandrel in such a way that the shock absorber assembly is movable between an expanded condition and a compressed condition. |
