Analysis of global forces in the wellhead/wellhead connector as a function of wellhead lateral support and stiffness

Abstract

During the life of a well (typically 20 years), a number of operations need to be performed that requires the wellhead/wellhead connector to connect directly to a rig through a riser system. While connected to the vessel the wellhead and conductor system is subjected to many forces from the riser, BOP, waves and vessel. In deep water a small movement from the vessel can mean a large movement in the riser and BOP stack, which leads to higher loads on the wellhead/wellhead connector. This project will look into the angle of rotation and displacement of the wellhead datum considering bending stiffness and lateral support of the wellhead. Bending moment and shear forces obtained from a riser analysis of a drilling riser (done in OrcaFlex) will be applied at the wellhead datum.