Method for positioning a drilling rig onto an offshore platform

摘要

The invention relates to a method for positioning a drilling rig onto an offshore platform provided with a fixed first rig skid beam and a fixed second rig skid beam arranged horizontally and parallel to each other and defining a longitudinal direction, said method being characterized by the following steps: a. positioning a vessel near the offshore platform, said vessel transporting the drilling rig with a skid system comprising a first skid assembly to engage with the first rig skid beam and a second skid assembly to engage with the second rig skid beam, each first and second skid assembly comprising at least two skid shoes to engage with the respective first or second rig skid beam, a gripping unit to grip the respective first or second rig skid beam, and a push-pull device to apply push and pull forces between the gripping unit and one of the at least two skid shoes; b. adjusting a distance between the first and second skid assembly to correspond to a distance between the first and second rig skid beam; and c. positioning the drilling rig onto the offshore platform such that the first and second skid assembly engage with the first and second rig skid beam respectively to support the drilling rig from the first and second rig skid beam and to skid the drilling rig relative to the first and second rig skid beam in the longitudinal direction.