Drilling riser dynamic characteristics of marine deep water

Offshore drilling risers are important for connecting seabed wellhead and drilling vessels. By using fourth-order nonlinear partial differential equations for describing riser movement and the finite difference method (FDM), simulation analysis is conducted on riser forces. Considering the effect of top tension, buoyancy blocks and other factors on riser, corresponding calculation software is developed. The mechanical analysis and calculation program put forward in this paper feature in simplicity, high efficiency and high speed of calculation. They may be well applied to deep water drilling riser design and verification.