Numerical simulation of the collision of drilling risers with mooring lines in offshore oil exploitation

摘要

Many important operations in offshore oil industry such as drilling, completion or workover are being performed in congested areas, with increasing proximity between dynamic positioning (DP) drilling units and other production units based on ships or platforms. The drilling column of a DP unit is contained in a rigid riser, connected to a wellhead on the seabottom. If, for some reason, a DP unit operating near to a production unit loses control of its position, it disconnects the riser from the wellhead and may follow a trajectory that leads to the collision of the riser with a mooring line of the production unit.