Design of High-precision Underground Storage Electronic Pressure Gauge

Linshan WEI

Southwest Petroleum University, Chengdu, CHINA

Abstract: In order to measure formation pressure data more accurately, the paper developed a high-precision underground storage electronic pressure gauge. The pressure gauge consists of two parts: downhole instrument and ground processing. Downhole instrument uses87C652

microcontroller as the core to complete the collection and storage of well pressure and temperature. The ground processing part realized downhole data playback and processing. The paper detailing the structure and indicators of the instrument, as well as the system

hardware design and software design. The instrument can be achieved within the pressure range of 0Mpa ~ 70Mpa (temperature -40℃~ 150℃) measurement, the pressure accuracy up to 0.05%, which meets the requirements of the underground test.

Keywords: Formation pressure; High-precision; Electronic pressure gauge; Microcontroller; Pressure measurement