It USES the vibrations produced by a drill bit while drilling as a downhole seismicenergysource.
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。
2
The seismicsource USES the rotation of centrifugal quality to produce seismicenergy. 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。
3
On that basis, the vertical lapse stack source, energy concentrated bullet and explosive seismic hammer source have been developed.