Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1987-07-13
1988-11-15
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175113, 175406, 175408, E21B 704, E21B 708, E21B 302, E21B 1026
Patent
active
047842300
ABSTRACT:
An apparatus and method for drilling and then installing a production conduit (46) within an enlarged bore hole (D) along an underground path (P) between two surface locations (C, D). Upon completion of a pilot bore hole (B), a reamer (48) enlarges the bore hold (B). The drill string (10) is returned to the exit opening (E) for connection to the production conduit (46) for pulling the conduit (46) within the enlarged opening (D). One embodiment (FIGS. 19-21) utilizes canted rollers (168) for supporting the production conduit (46) at the exit opening (E) and effecting rotation thereof as the production conduit (46) is fed into the enlarged diameter opening (D).
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Cherrington Martin D.
Cherrington William D.
Letchford John F.
Novosad Stephen J.
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