Wellbore pressure is transmitted through an insulating metal bellows to a volume of silicone oil surrounding the quartz pressure crystal. Changes in hydrostatic pressure alter the resonance frequency. A second crystal, not subjected to external pressure, provides temperature compensation and allows for precision, high-resolution pressure calculations.
Transient analysis of extraction and accumulation pressure.
– Measurement of the pressure gradient at the bottom of the well. INTERFACTION AND TOOL COMBINATIONS Mbus, SRO (Surface Read) or Ultrawire™ Mbus QPS direct interfaces to MPL, XMW and XSH telemetry tools Can be used for memory logging or SRO. SRO QPS can be placed anywhere in the chain and can be combined with a second Ultrawire QPS can be placed anywhere in the chain and can be combined with another Can be used for memory or register SRO. Compatible with Sondex and OPTIONS Ultrawire™ toolbus (UW) or Memory toolbus (Mbus) Slickline memory or surface read mode (with suitable telemetry controller)
QPS Telemetry XTU or UMT
Pressure (maximum) 105MPa
Temperature (max.) 177°C
Measuring range 0 – 15000 psi
Resolution 0.008psi & <0.005 Deg C
Linearity <0.01% FS
Repeatability <0.01% FS
Hysteresis <0.01% FS
Drifts Less than 3psi per year
Voltage (nominal) 18VDC
Measuring point 74mm
Corrosion resistance of the material
Through end thread (top/bottom) 13/16″ 12 UN2A
GO End connector (top/bottom) 4mm single banana connector.