Boring rig alignment apparatus and method

Details Boring rig alignment apparatus and method Boring rig alignment apparatus and method

1975-07-30

1977-04-12

Martin, Jr., William D.

Geometrical instruments

Straight-line light ray type

Alignment device

33 1H, 33228, 33309, 356149, G01C 1500

Patent

active

040166554

ABSTRACT:
Methods and apparatus for vertical alignment of a borehole rig directly over a drilling site involve use of a camera placed in parallel orientation to the drilling mast or drill string and sighted in on the drill target, then allowed to swing free to the true-plumb position, thereafter bringing the mast back into parallel orientation with the now-plumb camera.

REFERENCES:
patent: 2517295 (1950-08-01), Esher
patent: 3426146 (1969-02-01), Seaman
patent: 3635565 (1972-01-01), Colson

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