E3S Web of Conferences.
EDP Sciences.
Vol. 208.
2020.
Drilling costs account for a large proportion whether in onshore or offshore oil gas development, and the same truth for offshore gas hydrates development. Therefore, reducing drilling costs is a prerequisite for realizing industrial development of gas hydrates in sea, only by changing traditional deep water drilling technology portfolio can achieve low-cost development [1]. © The Authors, published by EDP Sciences, 2020.