Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1980-08-25
1982-12-28
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175 62, 175 77, 175 78, E21B 418, E21B 704, E21C 110, E21C 511
Patent
active
043656765
ABSTRACT:
A hole is drilled laterally from a main well bore by lowering a drilling unit into the bore in a position of extension essentially longitudinally thereof, and then swinging the unit to a position of extension transversely of the well bore to drill the lateral hole. The drilling unit is desirably held by a carrier as the drilling unit and carrier are lowered into the well, and preferably is of a self-propelling character adapted to move entirely out of the carrier and grip the wall of the lateral hole in a manner transmitting the reactive forces of the drilling operation directly to the earth formation.
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Boyadjieff George I.
Campbell Andrew B.
Green William P.
Novosad Stephen J.
Varco International, Inc.
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