| 摘要 |
Slips slidably disposed on a mandrel for lowering into a well inside a tubul ar to be removed from the well move outwardly to engage the tubular upon withdrawing the mandrel carrying the slips from the well. In one implementation there is a conical surface such that movement between the slips and the conical surface expands the slips outwardly. These inner a nd outer bodies are relatively moved in the well such that the outer body expands against an inn er surface of the tubular in the well preparatory to removing the tubular from the well. After removin g the tool string and at least part of the tubular engaged by the slips out of the well, inner structure of the removal tool can be pulled, in a direction opposite to which the lifting force was applied, t o disengage the slips from the removed portion of the tubular.
|
