DISPLACEMENT ANNULAR SWIVEL

摘要

A displacement annular swivel is disclosed consisting of a mandrel with a sleeve assembly positioned around the outside diameter of the mandrel. The sleeve assembly consists of at least one radial bushing such that t he mandrel can be rotated and reciprocated within the sleeve assembly when the sleeve assembly is fixed in a stationary position. At least one sealing element is present on the sleeve assembly to radially seal against the outside diameter of the mandrel. A method for displacing drilling mud from a completed subsea wellbore is also disclosed consisting of closing a blowout preventer around the aforementioned tool connected to the work string. The tool thereby allow s the work string to be rotated and reciprocated when the blowout preventer is closed. Drilling fluid can then be displaced from the wellbore by pumping a fluid such as completion brine through the work string and out the choke and kill lines.