High pressure system

Details High pressure system High pressure system

2006-03-15

2010-02-09

Beach, Thomas A (Department: 3671)

Wells

Submerged well

Connection or disconnection of submerged members remotely...

C166S355000, C166S367000, C175S005000, C405S224400

Reexamination Certificate

active

07658228

ABSTRACT:
An arrangement and method for integrating a high pressure riser sleeve from the upper end of a high pressure drilling and workover riser terminated by an upper BOP close to sea level in one end and by a sub-sea blowout preventer BOP or a low riser package LRP close to the seabed in the lower end. The high pressure riser sleeve being installed, connected and integrated to the high pressure drilling and workover riser and extending up to and above the drill floor, inside a low pressure drilling riser slip joint which is connected to the drilling and workover riser. This relates to offshore drilling and well activities preformed from a floating drilling or workover rig or vessel. Operations can be switched from drilling with jointed drillpipe in a conventional manner, into performing underbalanced wireline and/or coiled tubing activities with full well pressure, much more effectively than with prior art.

REFERENCES:
patent: 5676209 (1997-10-01), Reynolds
patent: 5706897 (1998-01-01), Horton
patent: 6273193 (2001-08-01), Hermann et al.
patent: 2299355 (1996-10-01), None
patent: WO 98/58152 (1998-12-01), None
patent: WO 2005/100737 (2005-10-01), None

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