bottom hole densimeter

例句：

1. 1. The bottom hole densimeter was used to measure the depth of the well.
   底孔密度计被用来测量井的深度。
2. 2. The engineer used the bottom hole densimeter to determine the optimal drilling parameters.
   工程师使用底孔密度计来确定最佳的钻探参数。
3. 3. During the drilling process, the bottom hole densimeter was used to monitor the fluid flow rate.
   在钻井过程中，底孔密度计被用来监测流体的流量。