Boring or penetrating the earth – With signaling – indicating – testing or measuring
Patent
1981-07-20
1984-07-31
Pate, III, William F.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
175 93, 175107, E21B 402
Patent
active
044624697
ABSTRACT:
A motor for driving a rotary drilling bit within a well through which mud is circulated during a drilling operation, with the motor being driven by a secondary fluid which is isolated from the circulating mud but derives energy therefrom to power the motor. A pressure drop in the circulating mud across a choke in the drill string is utilized to cause motion of the secondary fluid through the motor. An instrument which is within the well and develops data to be transmitted to the surface of the earth controls actuation of the motor between different operating conditions in correspondence with data signals produced by the instrument, and the resulting variations in torque in the drill string and/or the variations in circulating fluid pressure are sensed at the surface of the earth to control and produce a readout representative of the down hole data.
REFERENCES:
patent: 3791043 (1974-02-01), Russell
patent: 3862499 (1975-01-01), Isham
patent: 3908770 (1975-09-01), Richter
patent: 3964556 (1976-06-01), Gearhart
patent: 4078620 (1978-03-01), Westlake
patent: 4098359 (1978-07-01), Birdwell
patent: 4181014 (1980-01-01), Zuvela
patent: 4211291 (1980-07-01), Kellner
patent: 4283779 (1981-08-01), Lamel
patent: 4351037 (1982-09-01), Scherbatskoy
AMF Inc.
Dougherty David E.
Gallagher John H.
Pate III William F.
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