钻压，就是当正常钻进时，下放钻柱，把部分钻柱的重力加到钻头上作为钻压。
钻井过程中，近钻头处钻压、扭矩等钻井工程参数的随钻准确测量对安全、高效钻井是十分重要的。
The measurement of engineering parameters near the bit while drilling is of significant importance for the safety and efficiency in a drilling process.
当转速一定时，提高钻压不利于防斜打直。
实验结果表明，钻柱的纵向振动主要与转速和钻压有关。
The results show that longitudinal vibration of drill string is relative to rotary speed and weight on bit (WOB).
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