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2009
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Invention
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Tractor with improved valve system.
A hydraulically powered tractor includes an elongated body, ... |
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Invention
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Rotating drill pipe protector attachment and fastener assembly. An attachment and fastener system... |
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Invention
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Tractor with improved valve system.
A hydraulically powered tractor adapted for advancement thro... |
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Invention
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Anti-stall tool for downhole drilling assemblies. An anti-stall tool in an oil well drilling asse... |
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Invention
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Spring-operated anti-stall tool. An anti-stall tool in an oil well drilling assembly that control... |
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2008
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Invention
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Electrically powered tractor. An electrically powered and controlled tractor system includes one ... |
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Invention
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In-situ molded non-rotating drill pipe protector assembly. A non-rotating drill pipe protector sl... |
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2007
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Invention
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Wellbore tractor with fluid conduit sheath. A fluid conduit sheath (18) for a wellbore tractor (1... |
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Invention
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Downhole tractor with turbine- powered motor. A wellbore tractor comprises an elongated body havi... |
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Invention
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Downhole tool with turbine-powered pump. A tool (112) for moving within a passage (132) comprises... |
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Invention
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Downhole tool with closed loop power systems. A tool (112) for moving within a passage (132) comp... |
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2006
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Invention
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Downhole tool with closed loop power systems.
A tool for moving within a passage comprises an el... |
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Invention
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Downhole tool with turbine-powered pump.
A tool for moving within a passage comprises an elongat... |
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Invention
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Downhole tool with turbine-powered motor.
A tool for moving within a passage comprises an elonga... |
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Invention
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Wellbore tractor with fluid conduit sheath.
A fluid conduit sheath for a wellbore tractor can pr... |
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2005
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Invention
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Roller link toggle gripper for downhole tractor. An expandable gripper assembly (100) may be conf... |
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2004
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Invention
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Downhole tractor with improved valve system. A hydraulically powered tractor 100 adapted for adva... |
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2001
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Invention
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Tractor with improved valve system |
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2000
|
Invention
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Long reach rotary drilling assembly. A long reach rotary drilling assembly comprises an elongated... |
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Invention
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Three-dimensional steering tool for controlled downhole extended-reach directional drilling. A st... |
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Invention
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Drill pipe protector assembly. A drill pipe protector assembly for providing hydraulic lift and i... |
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1999
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Invention
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Electro-hydraulically controlled tractor. A tractor (20) for moving within a borehole comprises b... |
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1996
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Invention
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Drill pipe/casing protector assembly. A drill pipe/casing protector assembly (18) for an undergro... |
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Invention
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Coiled tubing friction reducer. A tubing friction reducer (32) is mounted on a length of tubing w... |
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Invention
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Puller-thruster downhole tool. A method and apparatus for propelling a tool having a body within ... |
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1990
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Invention
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Drill pipe/casing protector and method. A drill pipe/casing protector is mounted on a length of d... |
