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.
Abstract:
Thickness shear mode resonator pressure sensors include a housing having an outer dimension that is less than 0.575 inch (14.605 millimeters). Pressure transducers may include a quartz pressure sensor and a quartz reference sensor, wherein an electronics assembly of the pressure transducer is configured to drive at least one of the quartz pressure sensor and the quartz reference sensor at a frequency greater than 10 MHz. Transducer assemblies include an electronics assembly configured to drive at least one quartz sensor of the transducer assembly at a frequency greater than 10 MHz.