Drill director

Details Drill director Drill director

1975-09-15

1977-08-09

Purser, Ernest R.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Tool position direction or inclination measuring or...

175 61, 175 73, 175 94, 175230, E21B 704

Patent

active

040404943

ABSTRACT:
The casing of a drill motor axis is provided with a deflection barrel free to turn to position the barrel relative to the motor to apply lateral force to the side of the motor directed along any desired radius. A gravity actuated mercury potentiometer connected to the barrel provides a barrel orientation responsive electric transmitter for remote indication of the barrel orientation in the hole being drilled. A hydraulic stepping motor and meshing teeth are used to position the barrel azimuthally about the motor axis with the use of vertical alignment means.

REFERENCES:
patent: 2890859 (1959-06-01), Garrison
patent: 2953350 (1960-09-01), Moore
patent: 3023821 (1962-07-01), Etherington
patent: 3126971 (1964-03-01), Kellner et al.
patent: 3298449 (1967-01-01), Bachman et al.
patent: 3326305 (1967-06-01), Garrett et al.
patent: 3561549 (1971-02-01), Garrison et al.
patent: 3581404 (1968-05-01), Sanfead
patent: 3791042 (1974-02-01), Bell
patent: 3823787 (1974-07-01), Haworth et al.
patent: 3853186 (1974-12-01), Dahl et al.
patent: 3888319 (1975-06-01), Bourne, Jr. et al.

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