Drill rig operator cab viewport

Details Drill rig operator cab viewport Drill rig operator cab viewport

1998-12-23

2000-08-01

Dayoan, D. Glenn

Boring or penetrating the earth

With particular accommodation for personnel

175209, 52112, 521711, E21B 4100

Patent

active

060952636

ABSTRACT:
A viewport is located in the floor of a drill rig operator's cab to enable a rig operator to view drilling operations. As drilling commences, the operator may view the material underlying the rig and make a visual determination that the coal seam has been reached, by identifying that the material has the characteristic black color of the coal. When the coal seam is reached, the drilling operation is then altered accordingly to prevent overdrilling.

REFERENCES:
patent: 1972846 (1934-09-01), Kelley
patent: 3756330 (1973-09-01), Russell, Jr.
patent: 3800890 (1974-04-01), Gyongyosi et al.
patent: 3863787 (1975-02-01), Ertl
patent: 4434861 (1984-03-01), Howeth
patent: 4580312 (1986-04-01), Van Raaij
patent: 4732462 (1988-03-01), Bel

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