Drilling head

Details Drilling head Drilling head

1979-08-24

1981-10-06

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

277 31, 285363, E21B 304

Patent

active

042930472

ABSTRACT:
A drilling head includes a tubular body with top, bottom and side openings. An oriented side outlet with an oriented replaceable bushing is releasably connected to the side opening. The head without the side outlet will pass through most rotary tables.
A top closure closes the annulus between a portion of the head above the side opening and a drive tube such as a kelly extending through the head. The top closure includes a rotor, adapted to form a non-rotating seal with the kelly, and a stator, with a rotating seal between the stator and rotor. The stator is supported on and releasably connected to the body. The rotor includes a seal tube rotatably supported by inboard bearings on the stator located above the rotating seal. The top closure is small enough to pass through even rotary tables that are too small to pass the drilling head.

REFERENCES:
patent: 2063839 (1936-12-01), Crooks et al.
patent: 3023012 (1962-02-01), Wilde
patent: 3033011 (1962-05-01), Garrett
patent: 3400938 (1968-09-01), Williams
patent: 3661469 (1972-05-01), Brown et al.
patent: 3934887 (1976-01-01), Biffle
patent: 4185857 (1980-01-01), Saracco

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