Direct bit drive for deep drilling tools

Details Direct bit drive for deep drilling tools Direct bit drive for deep drilling tools

1979-09-13

1981-05-05

Purser, Ernest R.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

415502, 418 48, E21B 402

Patent

active

042653231

ABSTRACT:
The present invention relates to a direct bit drive for deep drilling tools based on the Moineau principles. The drive is divided into two sections disposed end-to-end and co-axially in line, each with a defined helical working space between surfaces shaped in a manner of helical teeth, the said helical working spaces following oppositely turning helical paths and being arranged for the flow therethrough of the working medium, in axially opposite directions. In this manner, the axially thrust forces transmitted to the bit through the direct bit drive by working medium during a drilling operation are reduced.

REFERENCES:
patent: 2329386 (1943-09-01), Brennan
patent: 2591488 (1952-04-01), Yost
patent: 3203350 (1965-08-01), Chang
patent: 3982858 (1976-09-01), Tschirky

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