Well tool for use with down-hole drilling apparatus

Details Well tool for use with down-hole drilling apparatus Well tool for use with down-hole drilling apparatus

1988-02-29

1991-07-23

Neuder, William P.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

175349, E21B 1710

Patent

active

050335588

ABSTRACT:
A well tool for use in a down-hole drilling assembly wherein the drill bit is rotated without drill pipe rotation comprising a generally tubular body and a plurality of roller assemblies secured to the body, the roller assemblies including rollers which rotate around axes generally transverse to an axis passing lengthwise through the body of the well tool.

REFERENCES:
patent: 712488 (1902-11-01), Black
patent: 1281756 (1918-10-01), Black
patent: 1541791 (1925-06-01), Christofferson
patent: 1721004 (1929-07-01), Debose
patent: 1788377 (1931-01-01), Bishop
patent: 2151646 (1939-03-01), Subkow et al.
patent: 2466239 (1949-04-01), Holcombe
patent: 2877988 (1959-03-01), Cameron et al.
patent: 3338321 (1967-08-01), Pomeroy
patent: 4547833 (1985-10-01), Sharp
patent: 4612987 (1986-09-01), Cheek

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