Method and device for making a hole in the ground

Details Method and device for making a hole in the ground Method and device for making a hole in the ground

1987-08-10

1989-07-25

Taylor, Dennis L.

Boring or penetrating the earth

Processes

Boring with specific fluid

175203, 175424, 405248, E21B 718

Patent

active

048504408

ABSTRACT:
The head is carried by two flexible continuous drill pipes which surround each other and which are flexible enough to be uncoiled from a reel but which are still rigid enough almost not to get twisted in the ground on themselves or relative to each other during the operation of the head. The head is directed in the ground by means of fluid which is pumped through one of the pipes and wherewith the head is repelled relative to the wall of the already formed portion of the hole. One of the pipes connects to one or more directable spray nozzles on the front end of the head, the other one connects to one or more sidewise-issueing openings wherein preferably a directable spray nozzle is mounted.

REFERENCES:
patent: 2548616 (1951-04-01), Priestman et al.
patent: 3424255 (1969-01-01), Mori et al.
patent: 3856095 (1974-12-01), Adair et al.
patent: 4534427 (1985-08-01), Wang et al.

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