Drilling Experiences of the deep sea drilling vessel CHIKYU in High Current

摘要

Deep Sea Drilling Vessel CHIKYU is the first riser equipped scientific drilling vessel in the world. CHIKYU started the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) from September 2007. The speed of current encountered with CHIKYU has been frequently measured more than 4.0kt throughout NanTroSEIZE. So far, CHIKYU carried out drilling operations. In this report, summaries of experiences and findings associated with high current in drilling operations of CHIKYU are described.