Description
The DV float collar and shoe, also known as double valve float equipment, double valve float collar, or float collar and float shoe assembly, is used in oil and gas well cementing operations to control one-way cement slurry flow and eliminate cement backflow into the casing after displacement.
During primary cementing, reverse flow is one of the most critical float equipment failures. U-tube slurry inversion can force cement slurry from the annulus back into the casing, destroy displacement control, contaminate the casing ID, weaken annular zonal isolation, and create costly remedial cementing work.
This DV float collar/shoe integrates spring-loaded check valve technology to secure one-way flow control and maintain hydrostatic pressure balancing after cement placement. The double valve configuration provides additional backflow control reliability for demanding cementing operations.
For severe service applications, the product can be designed and tested to API RP 10F IIIC severe service performance requirements. This means the float equipment can be validated for extreme cementing conditions such as 400°F / 204°C high temperature, high reverse differential pressure, and continuous high-sand abrasive circulation exceeding 24 hours when required by the cementing program.
The large flow area truncates pressure drop and strengthens slurry shear erosion resistance during long-period abrasive circulation. Drillable plastic and cement inner components allow fast drill-out with conventional or PDC bits, with typical drill-out time of approximately 15–20 minutes.
Optional configurations include double valve, down-jet, and up-jet designs according to well conditions and cementing program requirements.
What Problem Does It Solve?
| Field Risk | Engineering Solution |
|---|---|
| Cement slurry flows back into casing after displacement | Double valve system eliminates reverse flow path |
| U-tube slurry inversion occurs after pumps stop | Spring-loaded check valves secure one-way shut-off |
| Annular cement integrity is compromised | Backflow control guarantees annular zonal isolation integrity |
| High reverse pressure challenges float equipment | API RP 10F IIIC severe service performance validates reverse-pressure reliability |
| HPHT cementing damages valve performance | 400°F / 204°C severe service capability secures high-temperature operation |
| Abrasive slurry erodes valve components | Slurry shear erosion resistance protects valve performance |
| Circulation pressure becomes excessive | Large flow area truncates pressure drop |
| Drill-out consumes excessive rig time | PDC drillable components cut drill-out time to 15–20 minutes |
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | DV Float Collar/Shoe |
| Alternative Names | DV Float Equipment / Double Valve Float Collar / Float Collar and Shoe Assembly |
| Product Category | Float Collar & Float Shoe Equipment |
| Main Function | Cement Backflow Control / One-Way Flow Integrity |
| Valve Type | Spring-Loaded Check Valve / Double Valve Optional |
| Backflow Control | U-Tube Slurry Inversion Suppression |
| Pressure Function | Hydrostatic Pressure Balancing |
| Performance Reference | API RP 10F IIIC Severe Service Performance Available |
| Severe Service Criteria | 400°F / 204°C, High Reverse Differential Pressure, 24+ Hour High-Sand Abrasive Circulation |
| Flow Design | Large Flow Area |
| Erosion Resistance | Slurry Shear Erosion Resistance |
| Applicable Wells | Vertical / Highly Deviated / Horizontal Wells |
| Service Conditions | HPHT / Sour Gas / Abrasive Cementing Applications |
| Drill-Out Design | Conventional Bit / PDC Bit Drillable |
| Inner Components | Plastic & Cement Drillable Components |
| Typical Drill-Out Time | Approximately 15–20 Minutes |
| Optional Configuration | Double Valve / Down-Jet / Up-Jet |
| Customization | Available According to Float Collar, Float Shoe or Casing Size |
Need a custom specification?
Send us your tool model, working condition, quantity or technical drawing. Our team can help confirm the suitable product configuration and provide a quotation.
Email: info@shangshanpetro.com
Contact: Contact Us for a Quote
Product Features & Benefits
Double Valve System Eliminates Cement Backflow
The DV configuration provides redundant one-way flow control. After cement displacement, the spring-loaded valves close against reverse flow and eliminate cement slurry backflow into the casing.
API RP 10F IIIC Severe Service Performance
The float equipment can be supplied to API RP 10F IIIC severe service performance requirements. This performance level is designed for extreme cementing applications involving high temperature, high reverse pressure, and long-duration abrasive circulation.
400°F / 204°C High-Temperature Capability
For severe cementing environments, the product can be configured for 400°F / 204°C service conditions, supporting HPHT wells and demanding primary cementing operations.
U-Tube Slurry Inversion Suppression
The valve system suppresses U-tube slurry inversion after pumping stops. This secures cement placement integrity and prevents reverse flow from damaging the casing cementing program.
Hydrostatic Pressure Balancing
The float collar and shoe system maintains one-way shut-off under hydrostatic imbalance, supporting pressure stability after displacement and improving cementing control.
Large Flow Area Truncates Pressure Drop
The optimized internal passage reduces flow restriction and truncates pressure drop during circulation and cement displacement.
Slurry Shear Erosion Resistance
The flow path is designed to resist shear erosion caused by cement slurry, drilling fluid solids, and high-sand abrasive circulation. This protects valve reliability during severe service.
Fast Conventional and PDC Drill-Out
Plastic and cement drillable inner components allow fast drill-out with conventional or PDC bits. Typical drill-out time is approximately 15–20 minutes, reducing post-cementing rig time.
Optional Double Valve, Down-Jet and Up-Jet Designs
Different cementing programs may require redundancy, directional jetting, or special circulation behavior. Optional double valve, down-jet, and up-jet configurations are available.
Applications
The DV float collar and shoe is widely used in:
Oil and gas well cementing
Primary cementing operations
Float collar systems
Float shoe systems
Cement backflow control
U-tube slurry inversion suppression
Hydrostatic pressure balancing
Annular zonal isolation
Highly deviated wells
Horizontal wells
HPHT cementing operations
Sour gas wells
Abrasive circulation service
API RP 10F severe service float equipment
PDC drillable float equipment systems
Quality Control
| Inspection Item | Description |
|---|---|
| Material Verification | Confirms material quality and component traceability when required |
| Dimensional Inspection | Ensures accurate fit with casing, float collar or float shoe assembly |
| Valve Function Test | Verifies spring-loaded opening and closing response |
| Backflow Control Check | Confirms one-way shut-off and U-tube slurry inversion suppression |
| Reverse Pressure Review | Checks valve response under reverse pressure conditions |
| Flow Area Inspection | Confirms optimized flow path and pressure drop control |
| Erosion Resistance Review | Reviews valve structure for slurry shear erosion resistance |
| Drill-Out Design Review | Confirms PDC drillable inner component design |
| Optional Configuration Check | Verifies double valve, down-jet or up-jet structure when required |
| Final Inspection | Ensures the DV float collar/shoe is ready for cementing operation |
FAQ
What is a DV float collar and shoe used for?
A DV float collar and shoe is used in cementing operations to provide one-way flow control and eliminate cement slurry backflow into the casing after displacement.
What is U-tube slurry inversion?
U-tube slurry inversion occurs when hydrostatic imbalance forces cement slurry from the annulus back into the casing after pumping stops. The spring-loaded valve system suppresses this reverse flow.
What does API RP 10F IIIC severe service performance mean?
API RP 10F IIIC severe service performance is used for demanding float equipment applications. It can involve severe criteria such as 400°F / 204°C temperature, high reverse differential pressure, and continuous high-sand abrasive circulation exceeding 24 hours when required.
How does the product handle abrasive cement slurry?
The internal flow path is designed for slurry shear erosion resistance, protecting valve performance during long-period circulation with abrasive slurry or sand-laden fluids.
Can this product be used in horizontal wells?
Yes. The DV float collar and shoe can be used in vertical wells, highly deviated wells, and horizontal wells.
How long does drill-out take?
The inner components are made from drillable plastic and cement materials. Typical drill-out time is approximately 15–20 minutes with conventional or PDC bits.
What optional configurations are available?
Optional configurations include double valve, down-jet, and up-jet designs according to cementing program requirements.
What information is needed for quotation?
Please provide casing size, float collar or float shoe type, well condition, valve configuration, service temperature, pressure requirement, quantity and drawings if available.
Call to Action
If you need reliable DV float collar and shoe, double valve float equipment, or API RP 10F severe service float equipment for cement backflow control, please send us your tool model, working condition, quantity or drawings.
Our team can provide customized float collar and float shoe solutions for vertical wells, deviated wells, horizontal wells, HPHT wells, sour gas wells and demanding cementing applications.
Email: info@shangshanpetro.com
Contact: Contact Us for a Quote
