Drill Pipe Wiper Dart (DWP)
Product Overview
The Drill Pipe Wiper Dart is a rubber wiping device used in liner hanger applications to ensure clean and effective cement displacement. Dropped from surface, it separates cement from drilling fluid, preventing contamination and wiping the internal drill pipe ID to avoid cement sheathing or buildup.
Key Features
- Field-customizable fin configuration for optimal wiping performance
- Available in 3- and 4-fin designs to suit various well conditions
- Latching nose securely locks and seals into liner wiper plug
- Provides clear displacement indication during liner cementation
- Integrated anti-rotation mechanism ensures reliable drill-out performance
Applications & Completion Scenarios
- Used in liner hanger cementing operations
- Prevents fluid cross-contamination during displacement
- Ideal for wells requiring clean cement placement and debris-free drill pipe ID
Advantages
- Customizable fin geometry improves wiping efficiency across pipe sizes
- Secure locking and sealing ensure reliable plug engagement
- Elastomer composition resists swelling and wear in OBM/WBM environments
Compatibility
Compatible with standard liner wiper plugs, liner hanger systems, and drill pipe sizes from 3 1/2″ to 5″.
Certifications & Quality Assurance
Manufactured and tested to meet internal quality standards and API specifications for liner running and cementing accessories.
Technical Specifications
Operational Parameters
| Parameter | Specification |
|---|---|
| Fin Configuration | 3-fin or 4-fin |
| Function | Separation of fluids, internal drill pipe wiping |
| Material | High-strength elastomer |
| Application Pressure | Up to 5,000 psi (typical cementing operations) |
| Drill-Out | Non-rotating locking mechanism |
Mechanical Specifications
| Drill Pipe Size | Dim 1 | Dim 2 | Dim 3 | Dim 4 |
|---|---|---|---|---|
| 3 1/2" | 3.13" | 2.13" | 1.844" | 1.605" |
| 4" | 3.71" | 2.62" | 1.844" | 1.605" |
| 4 1/2" | 4.50" | 3.13" | 2.180" | 1.977" |
| 5" | 4.50" | 3.13" | 2.180" | 1.977" |
Survivability / Limits
| Property | Value |
|---|---|
| Temperature Rating | Up to 150°C |
| Drill Pipe Compatibility | 3 1/2" – 5" |
| Wiper Material | Resilient elastomer resistant to oil-based and water-based muds |