Research On The Technology Of Subsea Oil And Gas Facilities Leakage Rescue And Containment Device Design

In recent years, the scale of offshore oil production expands unceasingly, with the establishment of many drilling platform, the number of marine pipeline more and more. In addition to seawater, there are numerous solutes, seafloor sediments and Marine organismsmarine in the marine environment, Corrosive environment underwater lead to multiple marine pipeline damage. At the same time, with the process of marine petroleum exploitation, Because of the unbalance of formation pressure and bottomhole pressure may cause overflow accident. Pipeline rupture and formation fracture often occur in today's oil exploitation in our country. These accidents not only cause great economic losses, but also destroyed the marine ecological environment severely. Therefore the research on emergency treatment technology of leakage accident of marine petroleum exploitation is imminent.The purpose of the study is to deal with the spill caused by the process of marine petroleum exploitation, application of "underwater oil gas facilities leakage rescue technology" quickly control and collect oil. As far as possible to avoid the leakage of oil and gas pollution the environment. meet our growing demand of exploitation and utilization of Marine oil and gas safety.Through in-depth analysis the literature of the technical measures to the domestic and foreign major marine oil spill and its response to treatment ,put forward the"underwater oil gas facilities leakage rescue technology" of overall scheme.First uses the containment device in order to buckle spill point to collect the oil. Then the containment devicee is connected with the conveying device with the oil and gas with quick connector device.Finally transmission collected oil continuousto the surface engineering ship store.This paper first proposed the overall plan of "underwater oil gas facilities leakage rescue technology". In case of gas leakage accident, using the control device to collect leaking oil and gas, the containment bottom and bottom soil formation type sealing, the top joint with the valve. As the recovery of oil and gas inlet, high pressure fluid internal dynami. In order to ensure the recovery efficiency and recovery, numerical simulation and theoretical analysis of its internal flow field and on the seabed subsidence problems, so that the structure is optimized, and finally completed the structure design. By analyzing flow field, determine the structure of containment device, through the analysis of containment device in different contact stiffness of soil surface,the ultimate bearing capacity of the soil and soil deformation distribution determine containment device into the mud of the settlement. According to the containment device into the stress state of mud after complete containment device stress analysis and structure design. In order to ensure the structure strength and stiffness ofcontainment device apply to the sea bottom in the applicable conditions, such as the framework for the containment device node, the stress of the whole structure and key bearing structure strength analysis.