Device for positioning of a drill bit

Details Device for positioning of a drill bit Device for positioning of a drill bit

1990-07-20

1991-10-29

Kisliuk, Bruce M.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

175 45, 175220, 33 1H, 299 1, 173 20, 173 39, E21B 700, E21B 4702

Patent

active

050607359

ABSTRACT:
Device for positioning of a drill bit (1) at a positioning plane (2). A drill rig (3) is provided with two video cameras (9) for sensing the position of a light source (8) adjacent the drill bit. The video cameras are aligned in parallel. The image fields of the video cameras are displaced such relative to each other that the light source gives two points (20,21) on a monitor (10) common to the two cameras if the light source is situated outside the positioning plane and one point (11) if the light source is situated in the positioning plane.

REFERENCES:
patent: 3891039 (1975-06-01), Logerstrom
patent: 4027210 (1977-05-01), Weber
patent: 4238828 (1980-12-01), Hay et al.
patent: 4367021 (1983-01-01), Nordgren et al.
patent: 4506745 (1985-03-01), Bjor
patent: 4639868 (1987-01-01), Tanaka et al.
patent: 4708395 (1987-11-01), Petry et al.

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