Down hole apparatus for sensing and storing values of physical p

Details Down hole apparatus for sensing and storing values of physical p Down hole apparatus for sensing and storing values of physical p

1975-09-29

1976-08-31

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

340 18P, E21B 4706

Patent

active

039772454

ABSTRACT:
Apparatus for digitally recording the value of pressure and temperature, or other parameters, in a borehole logging instrument. In one embodiment the values of the earth parameter are converted to an A.C. signal, the frequency of which is a function of the value of the parameter. Clock means are provided for presenting, at selected time intervals, voltage pulses of selected short time length. The A.C. signal is gated to a counter for the selected short interval of time, and the count of the counter becomes a measure of the parameter. Solid state memory means are provided, and the output of the counter in the form of binary bits is stored in the memory. Means are provided for retrieving the instrument and reading out of the memory the binary bits as stored.

REFERENCES:
patent: 3732728 (1973-05-01), Fitzpatrick
patent: 3792430 (1974-02-01), Niven, Jr.
patent: 3810387 (1974-05-01), Stancliff

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