Riser Fill Up Valve

 The Cameron automatic Riser Fill-Up Valve is designed to prevent collapse of the riser if the level of drilling fluid drops due to intentional drive-off, loss of circulation, or accidental line disconnection.

During normal drilling operations, the valve's internal sleeve is kept closed by a spring. When riser pressure drops, hydrostatic pressure pushes up on the sleeve and overrides the spring force. This causes the valve to open and sea water enters the riser, equalizing the pressure and preventing collapse.

Features:

Automatic opening - When the combination of mud column pressure and pilot compression spring drops to 225 - 325 psi below the ambient ocean pressure, the main 4-way hydraulic valve switches, rerouting supply and accumulator fluid to the open side of the hydraulic cylinders, causing the fill-up valve sleeve to fully open, and sea water enters the riser, equalizing the pressure and preventing collapse.

Remote Opening - The fill-up valve will open when an open pilot hydraulic signal is sent from the surface.

Rapid Opening - Accumulators are used for rapid opening of the fill-up valve and for emergency opening capability when surface

hydraulic supply is lost. Accumulators are sized to provide as many as three function cycles.

Remote Closing - Once the fill-up valve opens, it remains in the open position until commanded to close by a disable/reset signal from the surface.

Field Proven