초록 ▼

A system is disclosed which may alternatively be used as a diverter or as a blowout preventer for a drilling rig. The system comprises a blowout preventer attached above a spool having a hydraulically driven sleeve/piston. An outlet flow passage in the spool, which may be connected to a vent line, i

A system is disclosed which may alternatively be used as a diverter or as a blowout preventer for a drilling rig. The system comprises a blowout preventer attached above a spool having a hydraulically driven sleeve/piston. An outlet flow passage in the spool, which may be connected to a vent line, is closed off by the sleeve wall when the spool piston is at rest. Hydraulic ports are connected above and below the blowout preventer annular piston and above and below the spool annular piston. The ports below the blowout preventer piston and above the spool piston are in fluid communication with each other. A hydraulic circuit is provided having two valves between a source of pressurized hydraulic fluid and a drain.

대표청구항 ▼

A system adapted for alternative use as a blowout preventer or a diverter, comprising a blowout preventer having a resilient packing means and having a closing port and an opening port by which connection of a source of pressurized hydraulic control fluid to the closing port closes the blowout preve

A system adapted for alternative use as a blowout preventer or a diverter, comprising a blowout preventer having a resilient packing means and having a closing port and an opening port by which connection of a source of pressurized hydraulic control fluid to the closing port closes the blowout preventer and connection of a source of pressurized hydraulic fluid to the opening port opens the blowout preventer, the blowout preventer when open having a vertical flow path for drilling fluid returns, a diverter spool means having a vertical flow path and disposed in series with and below the blowout preventer, hydraulic lines connected respectively between the opening port of the blowout preventer and said single hydraulic valve, between said single hydraulic valve and the lower port of the housing of the diverter spool means, and between the upper port of the housing of the diverter spool means and the closing port of the blowout preventer, and a reservoir of hydraulic control fluid disposed in the diverter housing above the diverter piston when the piston is in the lower position, whereby when the hydraulic valve is in the open position, a source of pressurized hydraulic control fluid is applied to the opening port of the blowout preventer thereby opening the blowout preventer and maintaining the diverter piston in its lower position, and when the hydraulic valve is in the close position, a source of pressurized hydraulic fluid is applied to the lower port of the diverter spool means operably raising the diverter piston from a lower position to an upper position, opening said outlet passage in said housing, forcing the hydraulic fluid from said reservoir above the diverter piston to the closing port of the blowout preventer via the hydraulic line between the upper port of the housing of the spool means and the closing port of the blowout preventer and operably sequentially closing the blowout preventer after the outlet passage in the diverter housing is opened.