关键词: 循环罐液位, 浮球, 数字显示, 实时监测, 连续监测, 溢漏预警

Abstract: At present, ultrasonic level gauge and float ball level meter are mainly used in drilling sites to monitor the mud tanks fluid level. Although the ultrasonic level gauge has achieved real-time and continuous measurement, its monitoring effect is affected to a certain extent when the liquid level fluctuates greatly, and it is easy to produce false alarms. The monitoring of float ball level meter is more stable and reliable, so it has become the main method for the drilling crews to judge the mud tank fluid level. However, the existing float ball level meters cannot record the change of the mud tank fluid level at multiple points in real time, and require personnel on duty to observe and record the mud tank fluid levels regularly. The labor intensity of the personnel is high, the judgment accuracy of overflow and leakage is low, and the timeliness is poor. In addition, the existing technology cannot automatically and accurately identify the mud man feeding, turn on or stopping the pump and so on, the false alarm rate is relatively high. For the above problems, a digital display and overflow and leakage early warning system for mud tanks based on float ball level meter is designed. The field application shows that the systemcan monitor the fluctuation of the mud tanks liquid level in real-time, continuously and stably during the process of pumping, pipe connection and flow rate changing. The monitoring accuracy of the system is ± 1 mm, and a leakage event was successfully warned by the system. The system realizes the digitization of the mud tank fluid level monitoring, which is of great significance for improving the recognition accuracy of overflow and leakage, reducing false alarms and underreporting. It is of great significance to further ensure the safety of drilling.

Key words: mud tank fluid level, float ball, digital display, real-time monitoring, continuous monitoring, overflow and leakage early warning