这里提出的井下压力探测器,在井下温度变化的情况下仍可保持其精度。十分精确、灵敏、稳定的井下压力测量值是各种储集层工程应用中所需要的,如深部储油层,特别是储气层,以及大的地温梯度的区域。在上述的应用场合,压力可达15,000磅/英寸~2(103.5×10~6牛顿/米~2),仪器必须测量一周内逐渐发生的小于1磅/英寸~2(6.9×10~3牛顿/米~2)的压力变化。常规的压力探测器的精度受开采重油时相对高温(180℃至350℃)的影响太大。井下压力探测器带有两个用同样材料做成的同轴管,它们随着压力的变化而在相反的方向上发生收缩 The downhole pressure detector proposed here can still maintain its accuracy under downhole temperature changes. Very accurate, sensitive, and stable downhole pressure measurements are required for various reservoir engineering applications, such as deep reservoirs, especially gas reservoirs, and large geothermal gradients. In the above applications, the pressure can reach 15,000 psi (103.5 x 10-6 N / m2) and the instrument must measure less than 1 psi (6.9 x 10-3) Newtons / M ~ 2) pressure changes. The accuracy of conventional pressure detectors is affected by the relatively high temperatures (180 ° C to 350 ° C) when mining heavy oil. Downhole pressure detectors with two coaxial tubes of the same material shrink in opposite directions as the pressure changes