DOWNHOLE PORE PRESSURE SENSOR Russian patent published in 2021 - IPC E21B47/06 E21B49/00 

FIELD: measurement.

SUBSTANCE: invention relates to measurement equipment and can be used to measure variations of porous pressures in soil massif and conversion of obtained measurements into digital code during survey, construction and operation of structures, as well as during monitoring of natural landsliding processes. Downhole pressure sensor of digital pore pressure consists of shell 2 located in well 1, inside of which there installed are pore pressure measurement unit 3, temperature measurement unit 4, time service unit 5, memory unit 6, unit 7 for temperature correction of pressure values, comparing unit 8 with threshold values, warning unit 9 and lightning protection terminal 10. Inputs of pore pressure measurement unit 3 and temperature measurement unit 4 are connected to outputs of time service unit 5, and outputs - to inputs of memory unit 6. Outputs of memory unit 6 are connected to inputs of pressure correction temperature correction unit 7. Output of pressure correction temperature correction unit 7 is connected to input of comparison unit 8 with threshold values. Output of comparison unit 8 with threshold values is connected to input of warning unit 9. Output of notification unit 9 is connected to the input of the lightning protection terminal 10.

EFFECT: higher accuracy of measuring pore pressure of the medium by taking into account the effect of temperature changes and the delay effect of the effects of temperature variations.

1 cl, 1 dwg