Continuous drill feed apparatus

Boring or penetrating the earth – With below-ground tool drive prime mover – With above-ground means

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Details

175104, 175107, 175122, 175162, E21B 420

Patent

active

049711628

ABSTRACT:
A continuous feed system for a drill comprising a down-hole drill assembly having a support end and a drilling bit. Rotation is imported to the down-hole drill assembly between the support end and the drilling bit, which results in a torque being applied to the support end. A vertically disposed support chain has two ends, one end of the chain is connected to the support end. The chain resists the torque with limited torsional flexibility. A drive interacts with the chain at a point between the two ends for positively providing axial extension of a length of the chain.

REFERENCES:
patent: 3150723 (1964-09-01), Hale
patent: 3692123 (1972-09-01), Gyongyosi
patent: 3773121 (1973-11-01), Ikeda
patent: 3872932 (1975-03-01), Gosselin
patent: 4105081 (1978-08-01), Perrand

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