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AssigneeWeatherford/Lamb, Inc.
InventorsDon M. Hannegan, Thomas F. Bailey, Simon J. Harrall
Estimating the term…
A system compensates for heave induced pressure fluctuations on a floating rig when a drill string or tubular is lifted off bottom and suspended on the rig, such as when tubular connections are made during MPD, tripping, or when a kick is circulated out during conventional drilling. In one embodiment, a liquid and a gas interface moves along a flow line between a riser and a gas accumulator as the tubular moves up and down. In another embodiment, a pressure relief valve or adjustable choke allows the movement of fluid from the riser when the tubular moves down, and a pump with a pressure regulator moves fluid to the riser when the tubular moves up. In other embodiments, a piston connected with the rig or the riser telescoping joint moves in a fluid container thereby communicating fluid either into or out of the riser annulus.
A system for managing pressure from a floating rig heaving relative to an ocean floor, comprising:
A method for managing pressure from a floating rig heaving relative to an ocean floor, comprising the steps of:
A method for managing pressure from a floating rig heaving relative to an ocean floor, comprising the steps of:
A system for managing pressure from a floating rig heaving relative to an ocean floor, comprising:
A method for managing pressure from a floating rig heaving relative to an ocean floor, comprising the steps of:
A system for managing pressure from a floating rig heaving relative to an ocean floor, comprising:
Dependencies are inferred from the claim text.