Because of these characteristics, the pressure measurement system with capillary tubing can be used without depth limit and can measure the downhole pressure continuously without time limit.
由于这些特点，毛细管测压系统在使用时无深度限制，可以不受时间限制连续地测取井下压力。
2
The Methodological investigation on the measurement of thickness of downhole casing with ultrasonic pulse echo technique is carried out both in theory and in experiments.
利用理论分析和实验模拟的方法研究了超声脉冲反射技术测量井下套管厚度的方法。
3
Aiming at urgent requirement of drilling leakage zone in real time measurement, the development of wireline downhole leak detector has prodigious practice sense.