The PPS71 Quartz Geothermal Tools are designed for extreme, high temperature downhole conditions. The robust electronics combined with vacuum flask technology allow these products to perform at 350 °C (662 °F) continuously, for four hours. The tool measures pressure, temperature, casing collar location, flow profile and gamma ray, and can be configured as either a memory tool or surface read out tool surface read out tool (SRO) tool. The measurements are done with a superior quartz transducer, a fast response resistance temperature detector (RTD), either a continuous or fullbore spinner flowmeter, magnetic CCL and sensitive gamma ray crystal. By combining the downhole measurements with PPS’s DepthWatcher (PPS36), a depth versus time recorder, customers have the capability to create synchronized profile logs which have many applications for the end user such as monitoring radioactive tracers in injected fluids, interpreting lithology, estimating shale volume and correlating cores with logged depth.

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Pressure Sensor TypeQuartz
Pressure Range5K psi | 10K psi | 18K psi
Accuracy± 0.02% FS
Temperature Sensor TypeRTD (Pt1,000; 4-wire)
Temperature Range300 °C (572 °F) | 350 °C (662 °F)
Accuracy± 0.5 °C
Resolution0.01 °C
Flow Profile Sensor TypeReed Switch/magnetic
Spinner Range5 – 7,000 RPM
Accuracy (< 20 RPS)± 0.5 revolution
Accuracy (> 20 RPS)± 0.25 revolution
Resolution (< 20 RPS)0.5 RPS
Resolution (> 20 RPS)0.1 RPS
Gamma Sensor TypeCrystal, NaI
SensitivityTypically 1.7 CPS/API