Wells – Processes – Freeing stuck object – grappling or fishing in well
Patent
1997-08-13
1999-09-07
Neuder, William
Wells
Processes
Freeing stuck object, grappling or fishing in well
294 8624, 166 98, E21B 3100
Patent
active
059472022
ABSTRACT:
A device for latching onto a down hole object located within a well bore is claimed. The device will include a mandrel connected to a work string and with an end adapted to engage the object. The device also includes a biasing member disposed about the mandrel; and, a collet member operatively disposed about the mandrel. The collet member will have a first end adapted to cooperate with the biasing member and a second end that contains an engaging member, operatively associated with the second end of the mandrel, for engaging the object. The mandrel and the collet member cooperate to form a chamber. The device will also include a locking member, contained within the chamber, for locking the mandrel and collet member together so that the mandrel and collet member act as one member. The locking member includes: a detent member; a housing member containing the detent member; a piston, adapted for containment within the chamber, for activating the locking member; and, a groove on the mandrel that cooperates with the detent member. The device may further comprise an activation port, associated with the mandrel, for activating the piston so that the housing member holds the detent member within the groove. The work string may be attached to a drill string, coiled tubing string or other work string. The object may be a stuck down hole tool, a down hole packer means, or some other type of apparatus used in the drilling, completion, and/or production of wells. Also disclosed is a method of engaging a down hole object with the spear device.
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Neuder William
Thru-Tubing Technology, Inc.
LandOfFree
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