Precision measuring system for down-hole production logging oil

Details Precision measuring system for down-hole production logging oil Precision measuring system for down-hole production logging oil

1975-03-07

1976-10-19

Queisser, Richard C.

Measuring and testing

Borehole or drilling

Downhole test

73362AR, E21B 4900, G01K 102, G01K 724

Patent

active

039863930

ABSTRACT:
A precision measuring system of extraordinary accuracy particularly adapted to down-hole production logging tool strings. The disclosure emphasizes both compensating and immunizing error reduction means for hostile environments comprising varying line currents as well as large and rapidly changing ambient temperature extremes. Standard sensors and transducers are utilized, linearized, and error corrected. Calibration means permit outputs in familiar engineering units and scales. Accuracy exceeds .+-. 0.4% of full scale or, in the case of temperature measurements .+-. 1.degree.F from 50.degree.F to 300.degree.F.

REFERENCES:
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patent: 3359801 (1967-12-01), Rasmussen
patent: 3410136 (1968-11-01), Johns et al.
patent: 3490286 (1970-01-01), Schwartz
patent: 3648523 (1972-03-01), Kemper et al.
patent: 3672215 (1972-06-01), Stout et al.
patent: 3688581 (1972-09-01), Le Quernec
patent: 3732728 (1973-05-01), Fitzpatrick
patent: 3906391 (1975-09-01), Murdock
patent: 3933046 (1976-01-01), Ebrecht

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