sv-6 drill rig, page-29

Shell may have a period between their wells in which MEO can utilise the rig, otherwise Shell would still be paying a dayrate for a rig that is not "making hole" for them. I imagine that Meo will be paying for the Demob/Mob costs and the dayrate during their use of the Rig and Shell pick it back up on their chosen location when it suits them. The international guys do this all the time. If rig supply is in high demand and you sign it up for 3 or 4 years and suddenly you find that your exploration schedule changes then the smart thing to do is to farm it out (get some one else to pay for it until you need it).