SUBMARINE DEVICE

摘要

A submarine device includes a hollow tank body (5), a marine riser (3), blowout preventer (BOP) (4) and tie back stem (6). The BOP (4) is located on the hollow tank body (5). The marine riser (3) is connected to a drilling vessel (1) at the upper end and connected to the BOP (4) at the lower end. The tie back stem (6) is connected to the hollow tank body (5) at the upper end and connected to the seabed wellhead by the submarine wellhead apparatus (7) at the lower end and thus connected to the casing (9) for producing oil or gas in the reservoir by the submarine wellhead apparatus (7). A passage for communicating the BOP and the tie back stem system is provided on the hollow tank body. The pipe string for conveying oil, gas, or bit cuttings and drilling mud in the drilling process is divided into two sections, i.e. the tie back stem (6) and the casing (9), by the wellhead apparatus settled on the seabed. Thereby the security of the drilling platform or the drilling vessel in the drilling process is ensured and the operability of the producing system is enhanced.