Deepwater blow out throttling apparatus and method
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United States of America Patent
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Sep 2, 2014
Grant Date -
Dec 13, 2012
app pub date -
Jun 9, 2011
filing date -
Jun 9, 2011
priority date (Note) -
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Abstract
A deepwater blow out throttling apparatus and method. The apparatus is sized to reach an equilibrium between the force of the oil flow against the equipment that constitute the apparatus during its assembly and the forces available from the ROV and the drill ship and connexion pipe to hold the pieces in position for assembly. This solution is applicable to all wells and requires sizing the diffusion transition spool and the throttling valves such that the forces of the flow of the free discharging oil can be overcome by the forces available from the ROV and drill ship. Downward loading from the drill ship during the throttling is applied as throttling generates forces and vibration that can exceed the physical strength of the riser piping and connections. Slow closing of the throttling device must be assured to avoid shocking (or water hammering) the oil well installation.
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