Targetable drill with pressure telemetering of drill parameters

Details Targetable drill with pressure telemetering of drill parameters Targetable drill with pressure telemetering of drill parameters

1984-07-19

1986-06-24

Novosad, Stephen J.

Boring or penetrating the earth

Automatic control

Of advance or applied tool weight

367 85, 33307, 175 45, E21B 4400, E21B 4702

Patent

active

045962936

ABSTRACT:
A dirigible drilling head is provided with a hydraulic pulser in its rotating inner tube in the form of a spindle piston which can obstruct the flushing medium passage and is displaced by a hydraulic circuit including a hydraulic valve. The hydraulic valve is in turn actuated by a miniature electronic circuit so that a variety of input parameters from respective sensors can be delivered to the circuit and transformed into respective hydraulic pulses which are monitored by a differential pressure pickup connected to the line feeding the flushing liquid to the string.

REFERENCES:
patent: 3841420 (1974-10-01), Russell
patent: 4351037 (1982-09-01), Scherbatskoy
patent: 4386422 (1983-05-01), Mumby et al.
patent: 4407374 (1983-10-01), Wallussek et al.
patent: 4513403 (1985-04-01), Troy

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