美国Serata Geomechanis公司推出第二代改进了的地层物性/应力测量仪P-2000型。这是一种计算机控制的钻孔探头,它可在原位测定复杂岩层的物性和软可塑性地层的应力状态。仪器以液压同时驱动处于不同方向的活塞使八只探头伸出并刺入钻孔壁。该系统可自动采集、分析并以图形显示在计算机上。软件把八个活塞所推动的探头揭示的各触点性质加以 Serata Geomechanis, Inc. of the United States introduced the second generation of improved formativity / stress gauge P-2000. This is a computer-controlled borehole probe that determines the physical properties of complex formations and the stress state of soft plastic formations in situ. The instrument hydraulically simultaneously drives the pistons in different directions to have eight probes stick out and pierce the borehole wall. The system can automatically collect, analyze and graphically display on the computer. The software incorporates the various contact properties revealed by the probe driven by the eight pistons