Research on new drill string heave compensation system for floating drilling platform

In order to solve the conflict between compensation effect and power consumption of heave compensation system which installed on floating drilling platform, a new type of drill string heave compensation system is designed. This system has the advantages of low energy consumption of passive compensator and stable performance of active compensator. The mathematical model of semi-active heave compensation transient response is established based on MATLAB/SIMULINK through dynamic mechanics analysis. The results of simulation show that the semi-active heave compensation system with good compensation effects is stable and reliable. According to similar theories, heave compensation test bed based on the data of simulation is built to simulate heave movement, drill string load and heave compensation experiment. The experiment results of passive, active and semi-active heave compensation show that the semi-active heave compensation system is the most effective in compensation effect and consumes the lowest energy.