Steerable drilling mole

Details Steerable drilling mole Steerable drilling mole

1990-02-20

1991-03-26

Novosad, Stephen J.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Tool position direction or inclination measuring or...

175 61, 175 74, 175107, E21B 708, E21B 47022

Patent

active

050021389

ABSTRACT:
Steerable mole for making a hole (31) in the ground (30), which drilling mole has a round tubular body (1), a guidable drilling instrument (2, 3) mounted in front on this body (1) by means of a ball and socket joint (4, 5) and means (7-9) mounted in the body (1) in order to guide the drilling instrument (2, 3) in relation to the body (1), characterized in that the ball (4) of the ball and socket joint (4, 5) is fixed to the drilling instrument (2, 3), while the means (7-9) for guiding the drilling instrument (2, 3) have a steering element (7) situated in which turns round the longitudinal axis of the body (1) the body (1) of which the front is directed obliquely at this longitudinal axis of the body (1) and works together with the back of the ball (4) of the ball and socket joint (4, 5) and means ( 8, 9) to rotate the steering element (7) round the longitudinal axis of the body (1).

REFERENCES:
patent: 2167194 (1939-07-01), Anderson
patent: 2685431 (1954-08-01), James
patent: 3888319 (1975-06-01), Bourne, Jr. et al.
patent: 4655299 (1987-04-01), Schoeffler
patent: 4823888 (1989-04-01), Smet
patent: 4907658 (1990-03-01), Stangl et al.
Development of Directional Drilling, "The Lane-Wells Knuckle Joint", published by Lane-Wells, Mar.-Apr. 1938, 1 page.

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