Product Overview
Our dual plate check valve is a premium one-way flow control tool installed in coiled tubing downhole assemblies to prevent undesirable reverse fluid flow during well intervention, cementing, fracturing and workover operations. Two independent spring-loaded flap plates close automatically when reverse flow occurs, providing redundant sealing against backpressure. When forward flow is applied, the plates pivot open with minimal pressure drop, allowing high-rate forward circulation. The dual-plate design ensures continued sealing even if one plate is damaged by debris or erosion, greatly enhancing operational safety. Precision machined from high-strength alloy steel with hardened seating surfaces, the check valve delivers reliable long-term performance in abrasive, corrosive and high-pressure downhole environments. Standard threaded connections integrate directly with coiled tubing connectors and bottom hole assemblies. Sour-grade material options complying with NACE MR0175 / ISO 15156 are available for H₂S and CO₂ wells.
Core Features & Benefits
- Dual independent spring-loaded flap plates provide redundant reverse flow sealing
- Low pressure drop forward flow design maximizes pumping efficiency during circulation
- Hardened alloy seating surfaces resist erosion from sand-laden treatment fluids
- Compact short-length body minimizes overall BHA length
- Standard API thread connections at both ends for direct BHA integration
- Field-serviceable plate and seat assembly reduces maintenance cost
- NACE MR0175 / ISO 15156 sour service material options for H₂S wells
- Customizable cracking pressure, thread types and material grades available
Technical Specifications
| Model No. | Tool OD | Bore ID | Connection | Length | Cracking Pressure | Max Working Pressure | Max Flow Rate | Temp Range |
|---|---|---|---|---|---|---|---|---|
| DCV-150 | 1.687" | 0.750" | 1" AMMT | 8" | 0.5 PSI | 10,000 PSI | 3.0 bpm | 0°F~350°F |
| DCV-175 | 1.750" | 0.875" | 1" AMMT | 8" | 0.5 PSI | 10,000 PSI | 3.5 bpm | 0°F~350°F |
| DCV-200 | 2.250" | 1.000" | 1 1/2" AMMT | 10" | 0.5 PSI | 10,000 PSI | 5.0 bpm | 0°F~350°F |
| DCV-250 | 2.875" | 1.250" | 2 3/8" PAC | 12" | 0.5 PSI | 10,000 PSI | 7.0 bpm | 0°F~350°F |
| DCV-150-S | 1.687" | 0.750" | 1" AMMT | 8" | 0.5 PSI | 10,000 PSI | 3.0 bpm | 0°F~350°F |
Note: Custom cracking pressure, thread types and material grades available upon request.
Typical Applications
- Coiled tubing sand washing and casing cleanup to prevent formation fluid backflow
- Acidizing and hydraulic fracturing flow string backflow prevention
- Plug milling operations to stop debris entering upper tubing strings
- Sour well intervention with corrosive production fluid
- Well testing and circulation operations requiring one-way flow control
- Jet washing work for horizontal and deviated wellbores
- Temporary flow isolation during bottom hole tool retrieval
Advantages Over Single-Plate Check Valves
- Dual symmetric plates share flow impact load, reducing single component wear and extending service life
- Lower opening pressure allows circulation to start at smaller pumping pressure
- Balanced plate structure reduces valve vibration under turbulent flow conditions
- Split housing design simplifies maintenance without requiring full tool replacement
- Larger equivalent flow area creates less pumping pressure drop for higher operational efficiency
- More reliable sealing under uneven backflow pressure distribution inside the wellbore
FAQ
Q: What is the cracking pressure of the check valve?
A: Standard cracking pressure is 0.5 PSI. Higher cracking pressures are available upon request.
Q: Can the check valve be serviced in the field?
A: Yes, the plate and seat assembly can be replaced in the field with standard tools.
Q: What sizes are available?
A: Standard sizes range from 1.687" to 2.875" tool OD. Custom sizes available.
Q: Is a sour service version available?
A: Yes, NACE MR0175 compliant material options are available for H₂S service.
Get Custom Datasheet & Factory Quote
We manufacture full series downhole check valves with rigorous QC and complete certification. Contact us with your flow rate, working pressure and well conditions for detailed datasheet and competitive factory quotation.
