Patent ID: 9624739
Date: 2017-04-18
CPC Classifications: E21B

Claim:
1. An offshore drilling rig comprising: a drill floor deck having a hole defining a first well centre; a support structure including one or more guide members, displaced from and located on a first side of the first well centre; a mounting structure for suspending suspendable auxiliary equipment from an elevated position above the drill floor deck and into the first well centre; a first hoisting system configured for hoisting and lowering tubular equipment through the first well centre, wherein the first hoisting system is operable independently of the mounting structure; first pipe handling equipment for moving tubular equipment to the first hoisting system so as to allow the first hoisting system to hoist or lower the tubular equipment through the first well centre; and wherein: the mounting structure is connected to the one or more guide members of the support structure such that the one or more guide members of the support structure supports the mounting structure and the suspended suspendable auxiliary equipment, and the mounting structure is movable vertically along the guide members of the support structure between at least a lower position and said elevated position; and the lower position is for rigging up the suspendable auxiliary equipment to the mounting structure at the lower position, and the elevated position is for allowing lowering or hoisting of the suspendable auxiliary equipment suspended from the mounting structure through the first well centre.