| 摘要 |
A breakout tool including a breakout tong adapted to grip a first one of the two components of a drill string. The breakout tool can be used for breaking out the two components of a drill string while a second one of the two components is held stationary. The breakout tong includes a first jaw and a second jaw, with the second jaw pivotally coupled to the first jaw at a first pivot point. A small hydraulic cylinder is provided in the breakout tong for forcing the second jaw to pivot about the first pivot point when it is activated wherein, in use, the first drill string component can be gripped between the second jaw and the first jaw. A main hydraulic cylinder is adapted to be mounted on the drill rig, and which is mechanically coupled to the breakout tong for applying a torque to the breakout tong. In use, the two components of the drill string can be broken apart by the breakout tong gripping the first drill string component and applying a torque thereto via the main hydraulic cylinder. |
