基于AMESim的隔水管张紧器抗反冲控制研究

作为浮式钻井隔水管系统的关键装备,国产隔水管张紧器因其抗反冲控制试验难度大、成本高、风险不可控等因素,制约着产品的工业化应用进程。为降低隔水管张紧器的海试应用风险,提高张紧器抗反冲控制效果,以AMESim软件为仿真平台,选用南海某浮式钻井平台的隔水管系统为依据,建立抗反冲阀、张紧器、隔水管串及控制系统等相关模型,并搭建抗反冲控制系统,研究控制参数及脱离时刻对抗反冲控制的影响。研究结果表明:液缸位置-主阀开度控制曲线是抗反冲控制的关键因素;不同的脱离时刻对于张紧器抗反冲控制效果影响较大,为避免脱离时隔水管串出现局部弯曲的现象,建议脱离时刻选取在平台升沉曲线180°相位的附近。研究结果可为隔水管张紧器的控制逻辑优化和海试应用提供一定的依据。

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.