Patent ID: 8387704
Filing Date: 2013-03-05
Classification: B63B,E21B

Abstract:
1. A system for simultaneous execution of operations by a drilling rig or completion rig comprising: at least two sustaining beams which are substantially parallel to and separated from each other, which are substantially parallel to the sea surface, and extend horizontally over an entire length of a moon pool; a first mobile base which is supported on the at least two sustaining beams and can move horizontally over the at least two sustaining beams with the use of sliding elements; and a second mobile base which is supported on the at least two sustaining beams and can move horizontally on the at least two sustaining beams with the use of sliding elements, wherein the system is configured such that items of subsea equipment can be simultaneously supported on the first and second mobile bases, respectively, while the items of subsea equipment extend below the at least two sustaining beams in a gravitational direction.