Multi-Function Kelly Cock Valve: 3-in-1 Well Control Solution
The Conventional Valve Limitation
Standard kelly cocks require:
-Separate check valve above kcock for full protection → added connections & failure points
-No circulation capability once closed → requires valve removal for killing operations
-Limited functionality in high-pressure differential environments
Our multi-function valve delivers:
✅ Integrated check/shutoff/circulation in single compact design
✅ 45MPa pressure differential operation
✅ -50°C to 190°C temperature range
Triple-Function Technology
1. Floating Ball Valve Mechanism
| Function | Mechanical Action | Application |
| Pressure Relief | Ball floats open with pressure equalization | Easy stabbing during connections |
| Shutoff | 90° rotation seals flow path | Emergency well control |
| Circulation | Partial rotation enables controlled flow | Kill operations without removal |
2. Advanced Materials Package
Body: API 4140/4145H steel with quench & temper treatment
Internals: 718 alloy & 17-4PH for H2S service (NACE MR0175)
Seals: Perfluoroelastomer compound (-50°C to 190°C)
3. High-Pressure Sealing Technology
Dual-seal system: Metal-to-metal primary, elastomer secondary
45MPa closing capability: Against full differential pressure
Zero-leak performance: API 6A PR2 testing protocol
| Technical Specifications | |
| Parameter | Specification |
| Pressure Rating | 15,000psi/103.5MPa (API 6A PSL 3) |
| Temperature Range | -50°C to +190°C |
| Operation | 90° manual rotation + automatic check |
| Connections | API REG, IF, FH (all standard sizes) |
| Materials | NACE MR0175 compliant options |
| Testing Standard | API 6A PR2, API RP 7G |
Operational Advantages Over Conventional Valves
✅ Eliminates Additional Tools
No separate check valve required → reduces connection points by 50%
Single tool maintenance versus multiple valve inventory
✅ Enhanced Safety
Automatic check function prevents backflow during connections
Visual position indicator shows open/closed status
✅ Operational Flexibility
Circulate through valve during kill operations
Pressure equalization feature enables easy stabbing
Field Applications
HPHT Drilling: 190°C high-temperature operations
Sour Gas Fields: Full NACE MR0175 compliance for H2S service
Arctic Operations: -50°C low-temperature performance
Deepwater: 15,000psi working pressure rating
Underbalanced Drilling: Maintains pressure integrity during connections
