Removal of tubulars from wells

Wells – Processes – Freeing stuck object – grappling or fishing in well

Reexamination Certificate

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Details

C166S098000, C294S086250, C294S096000

Reexamination Certificate

active

07036595

ABSTRACT:
Slips slidably disposed on a mandrel for lowering into a well inside a tubular 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 and outer bodies are relatively moved in the well such that the outer body expands against an inner surface of the tubular in the well preparatory to removing the tubular from the well. After removing 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, to disengage the slips from the removed portion of the tubular.

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U.S. Appl. No. 09/669,182, filed Sep. 25, 2000, Charles D. Hailey.

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