In-hole motor tachometer

Details In-hole motor tachometer In-hole motor tachometer

1982-06-25

1985-10-08

Birmiel, Howard A.

Measuring and testing

Borehole or drilling

Downhole test

367 85, 175 40, 175 45, 175107, G01V 140, E21B 4700

Patent

active

045452415

ABSTRACT:
My invention relates to tachometers for in-hole motors, such as fluid turbine motors used in drilling of bore holes in the earth.

REFERENCES:
patent: 2958511 (1960-11-01), Pfefferle
patent: 2958821 (1960-11-01), Webb
patent: 3756076 (1973-09-01), Quichard et al.
patent: 3908453 (1975-09-01), Jeter
patent: 4386422 (1983-05-01), Mumby et al.
"Borehole Telemetry", Technology Analysis, Birmiel, Technology Assessment & Forecast, U.S. Dept. of Commerce, P.T.O., pp. 60-66, Mar. 1977.

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