Earth boring device

Details Earth boring device Earth boring device

1994-02-18

1996-02-20

Dang, Hoang C.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

175400, E21B 708

Patent

active

054921848

ABSTRACT:
In an earth boring device with a boring head (14) rotatable about its axis (16), which boring head for the control of its direction has a control surface (18) inclined to its axis (16) and at least one jet (20) for the discharge of a pressurized boring fluid, with the jet openings being arranged on a side of the boring head parallel to the axis of the boring head and facing away from the control surface (18), the axial spacing of the jets from the boring head tip and their stream direction are so chosen that in the use of the boring head the streams escaping from the jets reach essentially only the region of earth lying to the side of the boring head.

REFERENCES:
patent: 451292 (1891-04-01), McKee
patent: 2196940 (1940-04-01), Potts
patent: 2324102 (1943-07-01), Miller et al.
patent: 2350986 (1944-06-01), Collins
patent: 2686660 (1954-08-01), Storm
patent: 2784943 (1957-03-01), Bylund
patent: 2903239 (1959-09-01), Standridge
patent: 3431991 (1969-03-01), Mikels
patent: 4930586 (1990-06-01), Turin et al.
patent: 4953638 (1990-09-01), Dunn

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