Boring or penetrating the earth – Processes – Boring horizontal bores
Patent
1977-06-10
1978-11-07
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring horizontal bores
175 20, 175161, 405184, E02D 706, E21C 1900, F16L 102
Patent
active
041240820
ABSTRACT:
The disclosed method of cutting a tunnel in plastic soil uses a pipe and a cutting head mounted on one end of the pipe. The inner diameter of the cutting head is less than the inner diameter of the pipe, and the outer diameter of the cutting head is greater than the outer diameter of the pipe. The method comprises the steps of (1) driving the pipe into plastic soil, cutting head first; (2) providing a lubricating flow of water on both the outside and the inside of the pipe adjacent to the cutting head; (3) withdrawing the pipe from the plastic soil in the opposite direction to the direction in which it was inserted; (4) raising the pipe and swinging to dumping area; and (5) suspending the pipe in the air with the cutting head uppermost in order to allow the soil within the pipe to slide out.
REFERENCES:
patent: 2325565 (1943-07-01), Williams
patent: 2599989 (1952-06-01), Haston
patent: 2798692 (1957-07-01), Thomas
patent: 3026950 (1962-03-01), Johnson
patent: 3303657 (1967-02-01), McConnell et al.
patent: 3307643 (1967-03-01), Ferri
patent: 3482641 (1969-12-01), Atkins
patent: 3656563 (1972-04-01), Blinne
patent: 3833075 (1974-09-01), Bachman et al.
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