Kenneth B Harker

US Patent:

20150007650, Jan 8, 2015

Filed:

Jul 2, 2013

Appl. No.:

13/934058

Inventors:

- Wilmington DE, US
Brennan F. Crellin - Cedar Hills UT, US
Kenneth R. Harker - West Jordan UT, US

International Classification:

E21B 47/06

US Classification:

7315251, 374136

Abstract:

Quartz resonator pressure transducers for use in subterranean boreholes include a quartz pressure sensor and an electronic temperature sensor. Temperature sensors include a constant current generator, a proportional to absolute temperature (PTAT) current generator, and a relaxation oscillator. Pressure transducers may include such a temperature sensor. Methods of monitoring pressure in a subterranean borehole may include monitoring a frequency output of a quartz pressure sensor and monitoring a frequency output of an electronic temperature sensor.