Wells – Processes – Assembling well part
Reexamination Certificate
2008-06-30
2010-12-21
Bomar, Shane (Department: 3672)
Wells
Processes
Assembling well part
C166S077510
Reexamination Certificate
active
07854265
ABSTRACT:
A pipe gripping assembly having a quill, an actuator and a drive assembly mounts to a top drive of a drilling rig. The quill is connected to a mandrel in the drive assembly. The drive assembly has a tapered mandrel and a set of slips that move along the taper into and out of engagement with the pipe. The actuator is connected to both the quill and a portion of the drive assembly. The actuator includes a motor and at least two sleeves that are threaded together. One sleeve has a spline on its outside diameter that mates to the motor and a gear. Power applied to the motor causes the actuator to move slips in the drive assembly into an engagement position that grips the pipe for lifting and rotating the pipe.
REFERENCES:
patent: 4593773 (1986-06-01), Skeie
patent: 5433279 (1995-07-01), Tessari et al.
patent: 6527047 (2003-03-01), Pietras
patent: 6622796 (2003-09-01), Pietras
patent: 6705405 (2004-03-01), Pietras
patent: 6742584 (2004-06-01), Appleton
patent: 7004259 (2006-02-01), Pietras
patent: 7140443 (2006-11-01), Beierbach et al.
patent: 7140445 (2006-11-01), Shahin et al.
patent: 7213656 (2007-05-01), Pietras
patent: 2003/0173073 (2003-09-01), Snider et al.
patent: 2009/0145594 (2009-06-01), Slack
Bomar Shane
Bracewell & Giuliani LLP
Loikith Catherine
Tesco Corporation
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