| 摘要 |
<p>A pulling tool (29) for retrieving well tools (90) from a well bore. The present invention allows the reach of the pulling tool (29) to be easily varied. The pulling tool (29) can also be assembled for emergency release by either upward or downward shearing forces. The weight of a well tool (90) engaged by the pulling tool (29) is fully supported by the housing (30) of the pulling tool (29). A manual release feature (99) is provided to release well tools (90) from the pulling tool (29) at the well surface without having to disassemble the pulling tool (29) or shear any pins (35).</p> |
