Description
Product Description
The hydraulic stage collar with closing plug is a two-stage cementing tool designed for cement placement in highly deviated wells, horizontal wells, and pressure-sensitive formations. It allows cementing operations to be performed in stages, reducing pressure load on weak zones and preventing lost circulation during casing cementing.
In high-angle wells, traditional free-fall opening plugs may not reliably reach the stage collar because of deviation, friction, debris, fluid drag, or long lateral sections. This creates a serious risk of failure to open, delayed second-stage cementing, poor cement placement, and expensive remedial operations.
This hydraulic cementing stage collar eliminates dependence on free-fall opening plug activation. It opens hydraulically through controlled differential pressure from surface, giving operators more predictable activation in wells where gravity-driven plug travel is unreliable.
After the second-stage cementing operation, the closing plug is used to close the tool and isolate the stage ports. This closing sequence is critical for maintaining casing integrity, preventing reverse flow, and ensuring a controlled cementing operation.
The adjustable shear pin system allows field crews to calibrate opening pressure according to the cementing program. This helps defend against surge-pressure activation and prevents premature opening while running casing or circulating before the planned stage operation.
The anti-rotation design improves drill-out efficiency after cementing and reduces rig time during post-cementing cleanout.
What Problem Does It Solve?
| Field Risk | Engineering Solution |
|---|---|
| Free-fall opening plug cannot reach the tool in horizontal wells | Hydraulic opening eliminates dependence on gravity-driven plug travel |
| Failure to open during second-stage cementing | Differential pressure firing provides controlled hydraulic activation |
| Failure to close after second-stage cementing | Closing plug supports controlled shut-off of stage ports |
| Surge pressure causes premature opening | Adjustable shear pins defend against surge-pressure activation |
| Weak formations suffer lost circulation | Two-stage cementing mitigates formation pressure load |
| Excessive ECD in long laterals | Staged cementing supports Equivalent Circulating Density management |
| Tool spins during drill-out | Anti-rotation design slashes PDC drill-out time |
| Long drill-out caused by opening plug components | No free-fall opening plug reduces drill-out obstruction |
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Hydraulic Stage Collar with Closing Plug |
| Alternative Names | Hydraulic Cementing Stage Collar / Closing Plug Stage Collar / Horizontal Well Stage Collar |
| Main Function | Two-Stage Cementing / Staged Cement Placement / ECD Management |
| Opening Method | Hydraulic Opening / Differential Pressure Firing |
| Opening Plug Requirement | No Free-Fall Opening Plug Required |
| Closing Method | Closing Plug Activated Shut-Off |
| Shear Pin System | Adjustable Shear Pins |
| Opening Pressure | Field-Calibrated According to Cementing Program |
| Premature Opening Control | Surge-Pressure Protection During Casing Running and Circulation |
| Drill-Out Design | Anti-Rotation / PDC Drillable Design |
| Applicable Wells | Highly Deviated Wells / Horizontal Wells / ERD Wells |
| Recommended Deviation | Greater Than 30° from Vertical / Horizontal Applications |
| Running Requirement | Slow and Smooth Casing Running to Prevent Premature Opening |
| Application | Primary Cementing / Extended-Reach Cementing / Lost Circulation Mitigation |
| Material | High Strength Alloy Steel Optional |
| Customization | Available According to Casing Size, Thread Type or Drawing |
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
Hydraulic Opening Eliminates Free-Fall Plug Failure
The tool opens hydraulically through differential pressure firing, eliminating dependence on free-fall opening plugs. This prevents plug travel failure in highly deviated wells, horizontal wells, and ERD applications.
Closing Plug Provides Controlled Shut-Off
After second-stage cementing, the closing plug activates the closing sequence and isolates the stage ports. This prevents uncontrolled flow communication and supports casing integrity after cement placement.
Adjustable Shear Pins Prevent Premature Opening
The adjustable shear pin system allows opening pressure to be calibrated according to the cementing program. This defends against surge-pressure activation while running casing or circulating before the planned opening stage.
Mitigates Lost Circulation in Weak Formations
By separating cement placement into stages, the tool mitigates pressure load on weak or fractured formations and prevents severe lost circulation during primary cementing.
Supports ECD Management in Extended-Reach Wells
For long laterals and narrow pressure windows, staged cementing supports Equivalent Circulating Density management and improves cement placement control.
Anti-Rotation Design Slashes Drill-Out Time
The anti-rotation structure prevents internal components from spinning during drill-out. Combined with PDC drillable components and no free-fall opening plug requirement, it reduces post-cementing drill-out time.
Optimized for Horizontal and High-Deviation Wells
Because hydraulic activation does not rely on gravity-driven plug travel, the tool is suitable for highly deviated wells greater than 30° from vertical and horizontal well sections.
Quality Control
| Inspection Item | Description |
|---|---|
| Material Verification | Confirms material grade, heat number and traceability when required |
| Dimensional Inspection | Ensures accurate fit of body assembly and internal components |
| Thread Inspection | Checks casing thread accuracy according to project requirements |
| Hydraulic Opening Check | Verifies hydraulic opening mechanism function |
| Closing Plug Function Check | Confirms closing plug activation and shut-off performance |
| Shear-Pin Calibration Check | Confirms opening pressure setting according to design requirement |
| Surge-Pressure Risk Review | Checks opening pressure configuration against running and circulation conditions |
| Anti-Rotation Function Check | Confirms anti-rotation structure for drill-out support |
| Drill-Out Design Review | Verifies PDC drillable and anti-rotation design requirements |
| Final Inspection | Ensures the hydraulic stage collar is ready for cementing operation |
FAQ
What is a hydraulic stage collar with closing plug used for?
A hydraulic stage collar with closing plug is used for two-stage cementing operations in highly deviated and horizontal wells. It opens hydraulically and closes with a closing plug after second-stage cementing.
Why does this tool not need a free-fall opening plug?
The tool opens by differential pressure from surface. This eliminates dependence on gravity-driven plug travel, which is unreliable in horizontal wells and high-deviation wells.
What is the function of the closing plug?
The closing plug activates the closing sequence after the second-stage cementing operation, shutting off the stage ports and helping maintain casing integrity.
How does the tool prevent premature opening?
The adjustable shear pin system allows opening pressure to be calibrated before running. This defends against premature opening caused by surge pressure during casing running or circulation.
What is differential pressure firing?
Differential pressure firing means the tool is opened by controlled pressure differential from surface, providing predictable activation in horizontal and ERD wells.
Call to Action
If you need a reliable hydraulic stage collar with closing plug, hydraulic cementing stage collar, or horizontal well stage collar for lost circulation mitigation and ECD management, please send us your tool model, working condition, quantity or drawings.
Our team can provide customized hydraulic stage cementing tool solutions for highly deviated wells, horizontal wells, ERD wells and pressure-sensitive cementing operations.
Email: info@shangshanpetro.com
Contact: Contact Us for a Quote
