Drilling data at MeBo200 drill site GeoB22605-1, Black Sea

Drilling data at site GeoB22605-1 were collected during operation of the sea floor drill rig MARUM-MeBo200 during research expedition M142 in November 2017 at the Danube Deep Sea fan in the Black Sea. Vertical movements of the drill head are monitored with an electromagnetic encoder type TXN 11551 FD by TWK Supreme Sensoric GmbH. Drilling depth was calculated by summing up the drill head movements with the drill being connected to the drill string. The accuracy of the calculated drilling depth is about 0.1%. Flow rate of the flush water was measured within the pressure line of the flush water pump by using a RN3/32/15SP360 flowmeter by UK Flowtechnik. The accuracy of the measurement is better than 0.2%

2017年11月于黑海多瑙河深海扇区执行M142号科考航次期间，依托MARUM-MeBo200型海底钻井平台采集了GeoB22605-1站位的钻井数据。钻井机头的垂直位移采用TWK Supreme Sensoric GmbH公司生产的TXN 11551 FD型电磁编码器进行监测。钻井深度通过累加钻井机头位移量计算得到，此时钻井与钻柱保持连接状态，计算所得钻井深度的精度约为0.1%。冲洗水泵压力管路内采用UK Flowtechnik公司生产的RN3/32/15SP360型流量计对冲洗水流量进行测量，该测量的精度优于0.2%。