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Double Flapper Check Valve For Coiled Tubing Tool String Safety Valve
The Double Flapper Check Valve is a safety valve connected to the
coiled tubing connector.The function of double flapper check valve
is to prevent wellbore fluids from entering the CT string in the
event of failure or damage to the coiled tubing string or surface
equipment, while allowing fluid pumped through the CT string to
enter the wellbore. The Double Flapper Check Valve has two flapper
cartridges which can be dissembled and replaced quickly. In the CT
string has a pinhole, the downhole check valve assembly is the
primary well control barrier. It is generally run directly below
the connector.
Maximum flow area through the flapper cartridges reduces unnecessary back pressure on the surface pumps. The flow path through the flapper cartridges does not restrict the passage of balls or darts if required during operations such as cementing.
Specification of Double Ended Roll-On Connector
CT Size | OD | ID | Connection | Operating Pressure | Temp. Rating | Tensile Strength | Service | |||||||||||||||||||||||||||||||
1 11/16” | 1.687” | 0.75” | 1” AMMT | 5000psi | 0-400F | 50000lbs | Normal | |||||||||||||||||||||||||||||||
2 1/8” | 2.125” | 0.89” | 1 1/2” AMMT | 5000psi | 0-400F | 90000lbs | Normal | |||||||||||||||||||||||||||||||
2 7/8” | 2.875” | 1.375” | 2 3/8” PAC | 5000psi | 0-400F | 120000lbs | Normal | |||||||||||||||||||||||||||||||
3 1/8” | 3.125” | 1” | 2 3/8” PAC | 5000psi | 0-400F | 140000lbs | Normal | |||||||||||||||||||||||||||||||
1 11/16” | 1.687” | 0.75” | 1” AMMT | 5000psi | 0-400F | 30000lbs | H2S | |||||||||||||||||||||||||||||||
2 1/8” | 2.125” | 0.89” | 1 1/2” AMMT | 5000psi | 0-400F | 55000lbs | H2S | |||||||||||||||||||||||||||||||
2 7/8” | 2.875” | 1.375” | 2 3/8” PAC | 5000psi | 0-400F | 88000lbs | H2S | |||||||||||||||||||||||||||||||
3 1/8” | 3.125” | 1.375” | 2 3/8” PAC | 5000psi | 0-400F | 96000lbs | H2S |