Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Normally curved guide or shaft
Patent
1984-08-03
1985-11-26
Novosad, Stephen J.
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
Normally curved guide or shaft
175107, 175 79, 175325, E21B 708
Patent
active
045549826
ABSTRACT:
Drilling apparatus is disclosed adapted for drilling upwardly a deviated hole from a carriage assembly disposed in a cased vertical hole below a target zone of a hydrocarbon bearing formation. The drilling apparatus includes a drill motor assembly having a drill bit driven by a shaft of a drill bit mud pressure driven motor. A weight on bit assembly is provided below the drill bit motor for imparting "weight-on-bit" drilling force to the drilling bit against the face of the borehole. The weight on bit assembly includes an anti-rotation assembly for preventing rotation of the drill bit motor with respect to the borehole and an axial drive assembly for applying axial force to the drill bit. Apparatus is provided to reverse the direction of the axial force generated by the weight on bit assembly. Apparatus is also provided to limit the axial force applied to the drill bit to a predetermined level.
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Dellinger et al., "Directional Technology Will Extend Drilling Reach" 9/1980 Oil and Gas Journal pp. 153-169.
Goodwin Michael
Hydril Company
Novosad Stephen J.
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