Patent ID: 9074446
Filing Date: 2015-07-07
Classification: E21B

Abstract:
1. A system for managed pressure drilling and for workover of a hydrocarbon well with a wellhead, the system comprising: a floating structure located in a body of water, the floating structure comprising a drill floor and a work deck, the work deck being movably arranged in relation to the drill floor; a riser and a slip joint, the slip joint being connected to the underside of the work deck and to the upper end of the riser such that the work deck can be moved relative to the riser, the riser extending from the slip joint and down to a subsea BOP which is arranged on the wellhead of the hydrocarbon well; a plurality of riser tensioners each of which is connected to the slip joint such that the riser is held under tension; a BOP which, when the system is in use, is arranged on the work deck; and a high-pressure riser which, when the system is in use, is arranged in and extends through the riser and the slip joint and is connected to the BOP on the work deck and to the subsea BOP, thereby forming a continuous high-pressure connection from the BOP on the work deck down to the hydrocarbon well.