Drill rod table bushing arrangement

Details Drill rod table bushing arrangement Drill rod table bushing arrangement

1976-12-10

1978-09-19

Scott, Samuel

Boring or penetrating the earth

With above-ground cleaner for boring means

64 235, 166 82, E21B 4100

Patent

active

041147014

ABSTRACT:
A drill rod table bushing arrangement which supresses drill steel whip while drilling under high thrust loads, and also prevents drill cuttings from accumulating on the drill table. A power operated ball wedge is operative to engage a drill rod, while high pressure air jets prevent drill cuttings from getting into the bushing.

REFERENCES:
patent: 2758891 (1956-04-01), Kammerer
patent: 2829866 (1958-04-01), Colquitt
patent: 3361493 (1968-01-01), Melton
patent: 3475781 (1969-11-01), Grant

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