Quartzdyne launches its resonant Quartz pressure transducer. At 0.5 in. in diameter, this transducer is 33% smaller than previous models. Drilling and production monitoring tools take advantage of the transducer's small size by measuring downhole pressure using smaller tools. This enables deeper drilling, monitoring of larger cross-sectional flows, passing of a wire or fiber by the sensor, or simply fitting into tighter applications. The key design element is a thickness-shear-mode quartz resonator that changes frequency proportional to applied pressure.
In rapid pressure/volume/temperature transients, the crystalline sensor equilibrates 50% faster and reports 90% smaller dynamic errors than prior quartz-transducer versions. The crystal oscillates by an application-specific integrated circuit (ASIC), a silicon chip that operates reliable for 5 years at 205°C, and is functional beyond 250° C. The ASIC is housed in a multichip hybrid-electronics module.
The entire transducer assembly has survived qualification testing including shock, vibration, and rapid thermal cycling. Like larger Quartzdyne products, this smaller transducer is accurate to less than 0.02% full scale and drifts less than 0.02% full-scale per annum at maximum conditions of 1,100 bar / 177°C. The transducer assembly is less than 4 in. long. It is available in frequency output or digital output. All wetted materials are rated for downhole corrosive service.