Method and device for making a hole in the ground
First Claim
1. A method for making a hole in the ground, according to which a head,- having at least one spray opening which opens outside said head on that end lying forward in the direction of the hole to be made and at least one sidewise-issueing opening, which head is connected to two somewhat flexible continuous drill pipes which are connected to said heads and which are flexible enough to be coiled on a reel and uncoiled therefrom, but which are still rigid enough almost not to get twisted in the ground on themselves or relative to one another during the operation of the head, one of said pipes communicating with said spray opening on the forward end of the head, the other pipe communicating with said sidewise-issueing opening, is driven into the ground notably by pumping fluid under a first high pressure through that pipe which opens on the opening in the forward-lying head end, fluid being at least temporarily pumped under another second pressure through the other pipe, the head being directed in the ground by means of fluid which is pumped through at least one of the pipes and wherewith the head s repelled relative to the wall of the already-formed portion of the hole, until said head has the required direction.
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Accused Products
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.
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Citations
16 Claims
- 1. A method for making a hole in the ground, according to which a head,- having at least one spray opening which opens outside said head on that end lying forward in the direction of the hole to be made and at least one sidewise-issueing opening, which head is connected to two somewhat flexible continuous drill pipes which are connected to said heads and which are flexible enough to be coiled on a reel and uncoiled therefrom, but which are still rigid enough almost not to get twisted in the ground on themselves or relative to one another during the operation of the head, one of said pipes communicating with said spray opening on the forward end of the head, the other pipe communicating with said sidewise-issueing opening, is driven into the ground notably by pumping fluid under a first high pressure through that pipe which opens on the opening in the forward-lying head end, fluid being at least temporarily pumped under another second pressure through the other pipe, the head being directed in the ground by means of fluid which is pumped through at least one of the pipes and wherewith the head s repelled relative to the wall of the already-formed portion of the hole, until said head has the required direction.
Specification