Boring or penetrating the earth – With orienting or racking means for unconnected tools or...
Patent
1982-08-02
1984-07-10
Novosad, Stephen J.
Boring or penetrating the earth
With orienting or racking means for unconnected tools or...
173 43, E21B 1900
Patent
active
044587686
ABSTRACT:
Well drilling apparatus including a powered drilling unit connectable to the upper end of a drill string and adapted to rotate it to drill a well, and a vertically extending guide track structure which guides the drilling unit for movement along the axis of the well, with a portion of the guide track structure being mounted for swinging movement between a drilling position in which the drilling unit is aligned with the axis of the well and a slightly inclined position in which the track structure guides the drilling unit for movement along an inclined axis in alignment with a mousehole, and with the drilling unit also preferably being mounted for movement to a laterally retracted position at a side of the well in which it leaves an area along the axis of the well unobstructed for use of conventional hoisting equipment in making a `round trip` of the drill string out of and then back into the well.
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"Descriptive Data-Bowen ES-7 Electric Drilling Swivel and Accessories."
Green William P.
Neuder William P.
Novosad Stephen J.
Varco International, Inc.
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