SUBSEA MANIFOLD

摘要

PURPOSE: A deep seafloor structure is provided to prevent plugs such as hydrate and wax from being produced inside a pipe by allowing seawater to flow into a second fluid passage and an oil supply pipe when a main valve is closed. CONSTITUTION: A deep seafloor structure (100) comprises a first fluid passage (112), a second fluid passage (120), a main valve (122), and a seawater inlet (130). The main valve is arranged between the first fluid passage and the second fluid passage to be selectively opened or closed. The seawater inlet allows seawater to flow in through the second fluid passage when the main valve is closed and a fluid is unable to flow in through the first and second fluid passages.