It USES the vibrations produced by a drill bit while drilling as a downhole seismic energy source.

随钻地震技术是利用钻井期间旋转钻头的振动作为井下震源。

youdao

The seismic source USES the rotation of centrifugal quality to produce seismic energy. The produced sweep signals are recorded by clockwise and counter clockwise rotation at each source point.

这种地震震源采用离心质量旋转地震能量，在每个震源点记录下顺时针转动和逆时针转动所产生的扫描信号。

youdao

On that basis, the vertical lapse stack source, energy concentrated bullet and explosive seismic hammer source have been developed.

在此基础上，研制了垂直延迟叠加震源、聚能弹震源和爆炸地震锤震源。

youdao