Design and Experimental Research of a Wellhead Overflow Monitoring System for Open-Circuit Drilling of Natural Gas Hydrate

Natural gas hydrate is easy to decompose and leak due the changes in temperature pressure during drilling, which causes safety accidents. Early monitoring of wellhead overflow a practical effective measure prevent blowouts other Herein, methane system for open-circuit drilling marine natural was designed. The consisted an overwater acoustic reception part underwater self-contained part, matching construction environment exploitation. Compared with existing logging technology (measurement while drilling), early warning content were realized at all stages casing running, cementing, completion fracturing process System communication data acquisition tests completed different water depths through sea trials, verified effectiveness design. research results provide important theoretical technical implications promoting development spill hydrates.