Wells – Processes – Destroying or dissolving well part
Patent
1997-04-11
1999-03-16
Neuder, William
Wells
Processes
Destroying or dissolving well part
166 557, 294 8634, E21B 3310
Patent
active
058818162
ABSTRACT:
A packer mill system for milling a packer in a wellbore has been invented which has, in certain aspects, a bushing with a hollow generally cylindrically shaped bushing body with a bottom, a top, a bushing bore extending therethrough from top to bottom, and at least one key on an interior surface thereof, the at least one key projecting inwardly into the bushing bore, a mandrel initially disposable within the bushing, the mandrel having a hollow generally cylindrically shaped mandrel body with a top, a bottom, a mandrel bore extending therethrough from top to bottom, and a slot system formed in an exterior surface of the mandrel body, the at least one key disposed for movement through the slot system, engagement apparatus connected to the bottom of the mandrel body for engaging the packer, milling apparatus connected to the bottom of the bushing body and disposed for movement therethrough of the engagement apparatus, the slot system having a series of one or more interconnected slots through which the at least one key is movable, the series of interconnected slot(s) including one or more exits at the top and at the bottom for movement of the at least one key out from the slot system thereby freeing the bushing from the mandrel. In certain aspects torsion or torque is applied only by the slot system and only in a single direction so that, when using a downhole motor, a rotary shoe or other mill can be replaced or redressed and then reinserted into the wellbore through the slot system to continue milling.
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McClung Guy
Neuder William
Weatherford / Lamb, Inc.
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