Bleedoff tool for well test system

Details Bleedoff tool for well test system Bleedoff tool for well test system

1986-09-08

1987-09-15

Novosad, Stephen J.

Wells

Submerged well

Testing

166340, E21B 3404

Patent

active

046933158

ABSTRACT:
Disclosed is a safety system for well testing, utilizing a new and novel bleedoff tool in the subsea test tree handling string, which provides rapid pressure reduction in the handling string and assures mechanical disconnect of the subsea test tree if the test tree cannot be disconnected hydraulically. The bleedoff tool is operated and opened to bleed pressure from the handling string by applying a predetermined torque. This tool may be extended by pull to transmit higher than opening torque and will transmit torque after opening. The bleedoff tool contains an internal valve, which closes when the bleedoff tool is opened, and retains fluids in the handling string. The bleedoff tool operating torque values are not changed by high internal pressures or great axial tension or compressive loads on the tool.

REFERENCES:
patent: 3451475 (1969-06-01), Price
patent: 3823773 (1974-07-01), Nutter
patent: 4234043 (1980-11-01), Roberts
patent: 4253525 (1981-03-01), Young
patent: 4286661 (1981-09-01), Gazda
patent: 4522370 (1985-06-01), Noack et al.

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