Boring or penetrating the earth – With tool drive prime mover or above-ground mechanical... – Rotary drive for a relatively advancing tool
Patent
1979-08-24
1981-08-04
Pate, III, William F.
Boring or penetrating the earth
With tool drive prime mover or above-ground mechanical...
Rotary drive for a relatively advancing tool
166 84, 277 31, 308194, 175214, E21B 304
Patent
active
042817242
ABSTRACT:
A drilling head includes a tubular body having removable means for sealing the body to a kelly or other drive tube, a drive bushing releasably mounted in the sealing means to turn the sealing means with the drive tube, the sealing means including a seal tube having a rotating seal means for sealing with the body and a non-rotating seal means for sealing with the drive tube, both seal means being releasably held to the seal tube by common retainer means, such sealing means being rotatably mounted on the body on removable outboard mono-stratum double acting anti-friction thrust bearing means at the top of the body, the outer bearing race being held between annular flanges, one flange being integral with the body and the other releasably connected to the body, and the inner bearing race being held between annular plates releasably connected to the seal tube, the body having a side outlet and flange connection for the drilling fluid return line substantially flush with the body.
REFERENCES:
patent: 2036537 (1936-04-01), Otis
patent: 2129433 (1938-09-01), MacClatchie
patent: 2846247 (1958-08-01), Davis
patent: 3128614 (1964-04-01), Auer
patent: 3361500 (1968-01-01), Pohle
patent: 3724862 (1973-04-01), Biffle
patent: 3977740 (1970-08-01), Struttmann
patent: 4065192 (1977-12-01), Sague
patent: 4089570 (1978-05-01), Makfeld
patent: 4154448 (1979-05-01), Biffle
patent: 4157186 (1979-06-01), Murray
Conley Ned L.
Pate III William F.
Robinson Murray
Rose David Alan
Smith International Inc.
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