Invention Grant
- Patent Title: Locking clutch for downhole motor
- Patent Title (中): 井下电机锁止离合器
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Application No.: US13063266Application Date: 2008-09-10
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Publication No.: US08776915B2Publication Date: 2014-07-15
- Inventor: James Edmond Beylotte , Lance D. Underwood
- Applicant: James Edmond Beylotte , Lance D. Underwood
- Applicant Address: US TX Houston
- Assignee: Smith International, Inc.
- Current Assignee: Smith International, Inc.
- Current Assignee Address: US TX Houston
- Agency: Osha Liang LLP
- International Application: PCT/US2008/075850 WO 20080910
- International Announcement: WO2010/030272 WO 20100318
- Main IPC: E21B19/22
- IPC: E21B19/22

Abstract:
A locking clutch to selectively transmit torque from a stator of a downhole tool to a rotor of the downhole tool includes at least one locking pawl radially between the rotor and the stator and configured to engage at least one recess formed in an outer periphery of the rotor, and a biasing mechanism configured to bias the at least one locking pawl into an engaged position. The at least one locking pawl includes a load path, two pivot axes, and a mass center. The at least one locking pawl transmits force from the stator to the rotor along the load path when in the engaged position, and centrifugal force urges the at least one locking pawl into a disengaged position when the rotor is rotated about one of the two pivot axes above a disengagement speed.
Public/Granted literature
- US20110214963A1 LOCKING CLUTCH FOR DOWNHOLE MOTOR Public/Granted day:2011-09-08
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