4FZ four-gate blowout preventer

4FZ four-gate blowout preventer is a key well control device used in continuous tubing operations in the oil industry.   Structural designGate configuration: equipped with full-closed gate, shear gate, slip gate and semi-closed gate.Gate features: The slip gate adopts a replaceable structural design, and the tooth design reduces the damage to the continuous tubing. There is a certain gap between the gate assembly and the gate chamber of the shell, allowing the gate to float up and down in the chamber, reducing the switch resistance and rubber core wear.   Working principleThrough hydraulic control, when high-pressure oil enters the cylinder closing chamber, the piston and piston rod are pushed to move the gate assembly along the track defined by the guide ribs in the gate chamber toward the center of the wellhead to achieve well sealing. When high-pressure oil enters the cylinder opening chamber, the gate assembly moves away from the center of the wellhead to open the wellhe…

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