Design of a Simple Subsea Wellhead and Christmas Tree and Verification of Key Operating Parameters
Subsea wellheads and Christmas trees are key pieces of equipment for the subsea development of offshore oil and gas fields,as well as key pieces of equipment for underwater production systems.They are widely used in medium-deep water oil and gas fields.With the increasing pressure on oil and gas storage and production in China's offshore areas,the development model of subsea wellheads is gradually shifting to shallow water areas,accelerating the research and development process of shallow water subsea wellheads and Christmas tree systems in China.Compared with the traditional medium-deep-water oil and gas field development,shallow-water oil and gas development puts more emphasis on cost and efficiency control.Based on the analysis of the characteristics of shallow water wellheads and Christmas tree devices at home and abroad,a simple,low-cost shallow water wellhead and Christmas tree system for water injection wells in combination with the physical parameters of an oil field at home was designed.Combining the structural characteristics of the jack-up rig,the drilling and completion operation process and the operation process was sorted out,and a stability and strength analysis model for the high-pressure riser was established,and the safe working load at the top of the high-pressure riser was proposed,which providing reference for the subsea development of water injection wells in similar sea areas at home and abroad.
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