FB-2 Equalizing Check Valve Wireline Lock Mandrel 

I. Overview:
FB-2 Equalizing Check Valve is actually a one-way plug, which can only withstand the pressure difference between the upper and lower. Compared with other plugs, it has the characteristics of convenient and reliable fishing.
The main purpose:
(1) Check whether the oil pipe is sealed;
(2) Setting hydraulic packer;
(3) Prevent the liquid from flowing back to the oil layer in the gas lift well;
(4) Protect the bottom layer when the top layer is increased.
II. Technical parameters:
Specifications: 2.75″/ 2.81″;
Salvage neck: 2.313″;
III. Structural characteristics and use:
FB-2 Equalizing Check Valve is composed of salvage neck, backing ring, steel ball, mandrel, outer cylinder, sealing assembly, lower joint, plug cap, etc.
Use the casting tool to connect the FB-2 Equalizing Check Valve, go down to the Baker R-type seat joint, shock down and cut off the shearing pin to lift out the casting tool to complete the setting.
When pulling out, use the tool to shock and cut the hexagon socket flat end set screw upwards, lift the tool string up after the pressure at the upper and lower ends is balanced, and pull out the FB-2 Equalizing Check Valve.
IV, matters needing attention:
Before use, check whether the screws and sealing assemblies are damaged, and replace them in time if they are damaged.

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