| 摘要 |
The present invention relates to a downhole sensor system for measuring a pressure of a fluid downhole in a well, comprising a well tubular structure having an inside and being arranged in a borehole with a wall and an annulus defined between the well tubular structure and the wall of the borehole, a sensor unit having a pressure unit sensor and being arranged in connection with the well tubular structure, the pressure unit sensor being adapted to measure a pressure of the fluid in the inside of the well tubular structure and/or in the annulus, the sensor unit further comprising a power supply and a communication module, a downhole tool comprising a power supply and a communication module for communication with the sensor unit, wherein the downhole tool further comprises a pressure tool sensor adapted to measure a pressure of the fluid inside the well tubular structure substantially opposite the pressure unit sensor for comparison with the pressure measured by the pressure unit sensor. The present invention also relates to a measuring method, calibrating methods and an isolation testing method. |
