Oil Filling Joint: Precision Fluid Injection for Downhole Tool Maintenance
The Tool Lubrication & Pressure Equalization Challenge
Inadequate filling systems cause:
⚠️ Contamination during fluid injection leading to tool failure
⚠️ Incomplete filling resulting in air pockets and reduced performance
⚠️ Pressure imbalance accelerating seal and bearing wear
⚠️ Time-consuming maintenance procedures increasing non-productive time
Our Oil Filling Joint Delivers:
✅ Sealed injection path preventing contamination
✅ Complete air evacuation for 100% fluid fill
✅ Pressure-balanced operation up to 10,000 PSI
✅ Quick-connect design reducing maintenance time by 70%
Design Features & Working Principle
Closed-System Injection Technology
| Feature | Specification | Functional Benefit |
|---|---|---|
| Dual-Seal System | Primary elastomer + secondary metal seal | Zero contamination during injection |
| Check Valve Design | Spring-loaded stainless steel check valve | Prevents backflow and maintains pressure |
| Vent Port | Integrated air bleed channel | Ensures complete fluid fill without air pockets |
| Connection Interface | SAE J1926 standard or custom OEM ports | Compatible with existing filling systems |
Technical Specifications
| Parameter | Specification |
|---|---|
| Pressure Rating | 10,000 PSI operating / 15,000 PSI test |
| Temperature Range | -40°C to 150°C |
| Flow Capacity | 1-5 GPM (depending on size) |
| Material Construction | 316 Stainless Steel body, Viton® seals |
| Connection Sizes | 1/4″ NPT to 1″ NPT (standard) |
| Weight | 0.5-2.5 kg (size dependent) |
Operational Advantages
Maintenance Efficiency
- 70% faster filling compared to conventional methods
- No disassembly required for routine lubrication
- Visual fill indicators for easy operation verification
Reliability & Safety
- Closed-system design eliminates environmental contamination
- Pressure relief safety valve prevents over-pressurization
- Corrosion-resistant materials for long-term reliability
Field Applications & Performance Data
Application Scenarios
- MWD/LWD Tools: Lubrication replenishment during rig floor service
- Top Drive Bearings: In-service lubrication without disassembly
- Hydraulic BOP Rams: Fluid volume compensation between tests
- Mud Motor Bearings: Pressure-balanced oil injection
Performance Metrics
✅ Fill Time: 3-8 minutes per tool (versus 15-25 minutes conventional)
✅ Fill Completeness: 100% fluid fill verified by pressure testing
✅ Contamination Prevention: Zero reported fluid contamination incidents
✅ Service Life: 5,000+ cycles without seal replacement
