Wells – Submerged well – Means removably connected to permanent well structure
Patent
1981-08-06
1984-02-21
Novosad, Stephen J.
Wells
Submerged well
Means removably connected to permanent well structure
60403, 60415, 175 5, E21B 3404
Patent
active
044324200
ABSTRACT:
A riser tensioner safety system for preventing damage to a floating drilling vessel in a broken cable event or an emergency disconnect of the riser is disclosed. The system uses standard pneumatic/hydraulic tensioning devices together with a safety valve which is installed in the hydraulic fluid supply line to the tensioning device. The valve is held open by tension in the riser tensioner lines. If tension drops below a predetermined level due to a broken cable event or an emergency disconnect of the riser, the valve closes rapidly preventing acceleration of the tensioner piston.
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Baer Gregory G.
Gregory Edward W.
Bell Keith A.
Exxon Production Research Co.
Neuder William P.
Novosad Stephen J.
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