UDT Tubing Retrievable Injection Pressure Operated Gas Lift Valves
All the gas lift valves features floating valve seat, which facilitates seat change outs to make valve repair easier and more economical.
UDT tubing retrievable injection pressure operated gas lift valves
UDT tubing retrievable injection pressure operated gas lift valves uses nitrogen charged, multi ply monel bellows to provide the force necessary to maintain the valve normally in closed position. These gas lift valves are installed in conventional mandrels for injection of gas into the tubing string. These valves are manufactured in variety of port sizes to suit a wide range of gas injection volume and flow rates. All the gas lift valves features floating valve seat, which facilitates seat change outs to make valve repair easier and more economical.
Operations
Injection gas enters the valve and acts on the effective bellow area. As the injection gas pressure overcomes the precharged pressure, the bellow compresses and lifts the stem tip off the seat. Injection gas then flows through the seat, past the reverse flow check valve, and into the production tubing. These valves are fitted with reverse flow check valves at the bottom to prevent production fluid backflow. The reverse flow check valves have elastomeric primary seal and metal to metal secondary seal to prevent tubing to casing communication. Reverse flow check valves are rated to 5000 psi differential pressure.
Special Features
- Field proven design and operation.
- Guided valve stem for precise alignment with the seat during operation.
- Reverse flow check valve fitted at the bottom to prevent backflow from tubing to casing.
- Mechanical stops limit bellows travel in both directions. This provides bellows protection and assures long life by keeping bellows travel within design limits.
- Tungsten carbide ball and seat provides long wear against abrasive and corrosive fluids.
- Replaceable floating seat.
- Large dome volume gives smooth stable valve operation that prevents stem and seat cutting.
- Manufactured from a variety of premium grade materials to provide corrosion and erosion resistance for the intended application. Stainless steel or Monel options are typically utilized for the outer and main body components.
- These valves can be charged with nitrogen gas from 400-1800 psi.
- Inspection and testing as per the stringent requirements of erstwhile API 11V1 & API 19G2
Specifications.
Key features of all UDT Swift Connectors
Self-aligned & no cross threading
Strength characteristics higher than casing pipe.
Make-up in 4 turn from stab to full make up
4 turn rotation make-up prevents connector back-off
Suitable for piling/jetting.
Visual indication of make-up
Low torque make-up with rig tongs.
Preloaded for fatigues.
High-pressure sealing.
Reversible and reusable
ENGINEERING DATA FOR UDT TUBING RETRIEVABLE INJECTION PRESSURE OPERATED GAS LIFT VALVES
