Page 34: of Offshore Engineer Magazine (Aug/Sep 2015)

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RCD rig up on the BOP stack.

Photos from Weatherford.

via two sealing elements. This enhancement enables accurate measurement of ? ow-out parame- ters and provides protection for the

Drilling rig personnel on the surface.

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Automated MPD control mani- fold – Two fully automated drilling chokes, along with a Coriolis mass ? owmeter and a hydraulic power unit, manipulate the choke posi- tion. For this operation, the choke manifold was spotted on the star- board side of the cantilever deck and was connected to the RCD with a 6in co-? ex main ? owline hose.

Throughout the drilling operation, the MPD system software recorded critical real-time data, including

Integrating MPD into the ? ow in and out of the well, ? uid density, temperature and The MPD system was also used in volumetric ? ow rate. freeing a differentially stuck drillstring.

With the bearing assembly While drilling the 8.5in section with a existing rig systemsexisting rig systems installed in the RCD, an additional mud weight of 16.5ppg, the MPD system pressure (BHP) within close tolerance auxiliary line was put in place to ensure applied roughly 550psi SBP to maintain

Revamping older o