Stability Analysis Method of Shallow Water Subsea Wellhead Based on Jack-Up Rig

With the prominent contradictions in the use of shallow water and the economic constraints of marginal oil and gas fields, the application of shallow water subsea development model is gradually being promoted. The shallow water subsea wellhead development mode adopts jack-up rig for drilling and completion operations, and the stability of subsea wellhead is crucial to ensure safety. In order to promote the technological progress of shallow water subsea wellhead development mode and improve the technical level of subsea drilling and completion equipment, a typical stack-up of shallow water subsea wellhead and riser system based on jack-up rig is proposed. The analysis model of the subsea wellhead and riser system under drilling and completion conditions is introduced in detail. The global dynamic control equation of the subsea wellhead and riser system in the shallow water subsea wellhead development mode is established, and the global stability analysis results of the subsea wellhead riser system are obtained using finite element method. The research results can provide valuable reference for the development of shallow water subsea development mode and equipment technologies, as well as the safe application in offshore oil and gas field.