1982-09-13
1985-02-19
Footland, Lenard A.
Cutlery
308 6R, F16C 3104
Patent
active
045001413
ABSTRACT:
An idler guide for a rotary drilling rig has a plurality of spring-loaded floating bearings along the inside wall of a cylindrical bearing member for stabilizing and guiding the rotational and axial movement of drill pipe through the guide. The floating bearings are spring-loaded to move inwardly or outwardly along the radius of the cylindrical bearing to accommodate both new and worn drill steel pipe. The bearings are free to rotate with any resultant combination of axial or rotational movements of the drill steel. Individual bearing members may be replaced through the exterior wall of the idler guide. A floating ring in the bottom of the idler guide deflects drilling fines from entering in the gap between the inside of the guide and the outside of drill pipe.
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patent: 3003830 (1961-10-01), Blazek
patent: 3301102 (1967-01-01), De Lara
patent: 3674324 (1972-07-01), Schweizer et al.
patent: 3951470 (1976-04-01), McLean
Barber Industries; "Barber Rotary Deck Bushings"; Bulletin, 1900.
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