Diverter system and blowout preventer

Details Diverter system and blowout preventer Diverter system and blowout preventer

1984-01-10

1985-10-15

Novosad, Stephen J.

Wells

Above ground apparatus

With seal for reciprocating member

166374, 137869, 251 11, E21B 3306

Patent

active

045468281

ABSTRACT:
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 BOP attached above a spool having a hydraulically driven sleeve/piston. An outlet 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 BOP annular piston and above and below the spool annular piston. The ports below the BOP piston and above the spool piston are in fluid communication with each other. A hydraulic circuit is provided having two valves between a source and a drain of pressurized hydraulic fluid.

REFERENCES:
patent: 3589667 (1971-06-01), Lewis
patent: 4378849 (1983-04-01), Wilks
patent: 4444250 (1984-04-01), Keithahn et al.
patent: 4444401 (1984-04-01), Roche et al.
patent: 4456062 (1984-06-01), Roche et al.
patent: 4456063 (1984-06-01), Roche

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