Boring or penetrating the earth – With above-ground means to feed tool
Patent
1993-01-19
1994-04-26
Bui, Thuy M.
Boring or penetrating the earth
With above-ground means to feed tool
166 82, E21B 3300
Patent
active
053058399
ABSTRACT:
A drilling head for the controlled operation of the drill string while diverting well fluids from the well. The drilling head incorporates a kelly drive and at least one stripper rubber which rotate with the drill string extending through the drilling head. Rotation of the drive bushing and stripper rubber are controlled by bearings disposed in a bearing chamber of the drilling head through which lubricant is circulated to reduce friction and cool the bearings. A turbine ring attached to the lock nut ring of the kelly drive circulates lubricant through the bearing chamber as it rotates in association with the drive assembly of the drilling head. The turbine pump ring forces circulation of lubricant as the drive assembly rotates in addition to the circulation by the remove lubricant pump or in the event the remote pump fails to operate. The turbine ring includes a plurality of angular slots to force circulation of the lubricant as the drive assembly rotates.
REFERENCES:
patent: 4326584 (1982-04-01), Watkins
patent: 4444401 (1984-04-01), Roche et al.
Alvarez Patricio D.
Bailey Thomas F.
Kalsi Manmohan S.
Moeller Larry F.
Bui Thuy M.
MASX Energy Services Group, Inc.
Sutherland Malcolm L.
Zarins Edgar A.
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