System for adapting top head drilling rigs for reverse circulati

Details System for adapting top head drilling rigs for reverse circulati System for adapting top head drilling rigs for reverse circulati

1979-05-04

1981-06-09

Pate, III, William F.

Boring or penetrating the earth

With above-ground means for handling drilling fluid or cutting

With tool shaft having plural passages for drilling fluid

173 57, 175320, 285137A, E21B 1112, E21B 2102

Patent

active

042719160

ABSTRACT:
A system for adapting top head drilling rigs for reverse circulation drilling includes a generally tubular adapter having an upper end which is threadedly received in the drive head of a top head drill rig. A collar is secured to the tubular adapter by a pair of rotary bearings and includes an exhaust chute for drilling debris and water. A sleeve is also secured to the tubular adapter by rotary bearings, and is provided with an annular chamber which receives compressed air from an outside source. The system also includes a plurality of lengths of drilling pipe having complementary interior and exterior threads at opposed ends thereof. The drilling pipe includes couplings at each end thereof which are joined in sealing relationship by the threaded engagement thereof. A hollow tube is secured to the exterior of the drilling pipe to provide an air flow path between the couplings at the opposed ends thereof. The hollow tubing extends to the sleeve of the adapter to conduct compressed air therefrom down the drilling pipe assembly to purge water and drilling debris from the hole.

REFERENCES:
patent: 2304394 (1942-12-01), Biermann et al.
patent: 3280925 (1966-10-01), Becker et al.
patent: 3489438 (1970-01-01), McClure
patent: 3601206 (1971-08-01), Giantom
patent: 3645343 (1972-02-01), Mays
patent: 3774697 (1973-11-01), Brown
patent: 4171187 (1979-10-01), Reed

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