Arrangement for removing borehole cuttings by reverse circulatio

Details Arrangement for removing borehole cuttings by reverse circulatio Arrangement for removing borehole cuttings by reverse circulatio

1980-12-01

1983-01-18

Novosad, Stephen J.

Boring or penetrating the earth

Below-ground mechanical motion converting means relatively...

175 65, 175324, E21B 704, E21B 716, E21B 718, E21B 1008

Patent

active

043687873

ABSTRACT:
An arrangement for drilling deviated wellbores, such as in extended reach drilling, which is particularly designed to reduce the chance of pressure-differential sticking of the drill string by removing the drilling cuttings from the wellbore bottom by reverse circulation of the drilling fluid using a pump powered by the cones of the rotary bit. The drill string is turned by a rotary, and as the drill string turns, the cones turn as they are rolled on the bottom of the hole. A power drive is taken off the bit cones, and powers a pump which pumps mud from the annulus, around and through the bit, and up the drill pipe. In this way, troublesome cuttings are kept out of the annulus, and the cuttings are more effectively removed by pumping up and out the drill pipe.

REFERENCES:
patent: 2174102 (1939-09-01), Catland
patent: 3416618 (1968-12-01), Kunnemann

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