Drill collar structure for use in deviated well bore drilling

Details Drill collar structure for use in deviated well bore drilling Drill collar structure for use in deviated well bore drilling

1984-10-09

1985-12-24

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175320, 285 47, 138149, 464 18, E21B 704

Patent

active

045600120

ABSTRACT:
A drill collar is formed by inner and outer tube means having an annular space extending longitudinally therebetween. Rigid filler material in the annular space forms, with the inner and outer tube means, a unitary elongated tubular structure. The rigid filler material precludes movement of the inner and outer tube means relative to each other. A longitudinal bore extends through the tubular structure.

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patent: 3422914 (1969-01-01), Pomeroy
patent: 3926265 (1975-12-01), Boutoucos
patent: 3935632 (1976-02-01), Maxson

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