AMESim-Based Research on Anti-Recoil Control of Riser Tensioner

As the key equipment of the floating drilling riser system, difficult anti-recoil control test, high cost and uncontrollable risk of the domestic riser tensioner restricts its industrial application process. To reduce the risk of sea trial application and improve the anti-recoil control effect of the riser tensioner, the AMESim software is used as the simulation platform to build models of anti-recoil valve, tensioner, riser string and control systems based on the riser system of a floating drilling platform in South China Sea. The anti-recoil control system is also built to study the influence of control parameters and emergency disconnection time against anti-recoil control. The study results show that the cylinder position-main valve opening control curve is the key factor for the anti-recoil control. Different emergency disconnection times have a great influence on the anti-recoil control effect of the tensioner. To avoid the local bending of the riser string when disconnected, it is recommended to select the emergency disconnection time in the vicinity of the 180° phase of the platform heave curve. The study results can provide a basis for the control logic optimization and sea trial application of the riser tensioner.