Wellhead retrieving tool

Details Wellhead retrieving tool Wellhead retrieving tool

1998-04-01

2000-05-02

Dang, Hoang

Wells

Means for perforating, weakening, bending or separating pipe...

Cutter rotates circumferentially of pipe

166 98, 166361, E21B 2900

Patent

active

060560495

ABSTRACT:
A wellhead retrieval tool is disclosed which is adaptable to a variety of configurations of wellheads. The tool comprises a spear through which a rotary cutter can operate. The tool can be adjustably supported off the top of the wellhead so that the grappling mechanism can be located at the proper distance for a grip on an inward upset or restriction within the wellhead. The clutching mechanism is located outside of the wellhead so as not to contaminate it with cuttings returned with the circulating fluid. The seal bore in the wellhead is protected by the tool to avoid damage. The dogs which engage the internal inward upset or restriction further have wickers or serrations on them to enhance the grip and to resist applied torque.

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