Title:
DOWNHOLE TOOL WITH SLIP RELEASING MECHANISM
Document Type and Number:
WIPO Patent Application WO2008076189
Kind Code:
B1
Abstract:
A downhole tool includes a lock for maintaining a slip in a reduced diameter position when running the tool in the well, and selectively releases the slip to move radially outward to a set position to suspend an anchored portion of the tool within a downhole tubular. The tool includes a mandrel having a through passage, with a hydraulic port within the mandrel that is closed to mandrel internal pressure as the tool is run in the wellbore. A ball seat covers hydraulic ports in the mandrel. A ball may be dropped to seat and increase pressure to open the ports. A piston moves in response to mandrel internal pressure applied through the hydraulic port to unlock the locking device, such that further movement of the piston releases the slip from the reduced diameter position to the set position.
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Inventors:
REIMERT LARRY E (US)
YOKLEY JOHN M (US)
YOKLEY JOHN M (US)
Application Number:
PCT/US2007/023792
Publication Date:
November 06, 2008
Filing Date:
November 15, 2007
Export Citation:
Assignee:
DRIL QUIP INC (US)
REIMERT LARRY E (US)
YOKLEY JOHN M (US)
REIMERT LARRY E (US)
YOKLEY JOHN M (US)
International Classes:
E21B23/00
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