Multi-Function Safety Kelly Cock Valve: 3-in-1 Well Control Solution
The Conventional Valve Limitation
Standard kelly cocks require compromise between safety and functionality:
⚠️ Check valve must be installed above kelly cock for complete protection
⚠️ No circulation capability once valve is closed
⚠️ Limited functionality in high-pressure differential environments
⚠️ Additional connections create potential leak paths
Our patented multi-function safety valve (201910398953.0) delivers:
✅ Integrated check/shutoff/circulation in single compact design
✅ No additional check valve required – reduces connection points
✅ Full circulation capability even when valve is activated
✅ Simplified BHA design with enhanced safety
Three-Function Technology
Patented Floating Ball Mechanism
| Function | Mechanical Action | Operational Benefit |
|---|---|---|
| Pressure Relief | Ball floats open with pressure equalization | Easy stabbing during connections |
| Kick Prevention | 90° rotation seals flow path | Positive well control barrier |
| Circulation | Partial rotation enables controlled flow | Kill operations without removal |
Normal Drilling
Valve Fully Open
Connection Operation
Automatic Check Function
Kick Detection
Manual Shutoff
Circulation Through Valve
Well Control Achieved
Technical Specifications
| Parameter | Specification |
|---|---|
| Patent Number | 201910398953.0 |
| Pressure Rating | 5,000psi / 10,000psi / 15,000psi |
| Temperature Range | -50°C to +190°C |
| Material Grades | API 4140/4145H + H2S resistant alloys |
| Ball Mechanism | Patented floating ball design |
| Seal Technology | Dual metal-to-metal and elastomer |
| Connections | API REG, IF, FH (all standard sizes) |
Operational Advantages
A. Multi-Function Capability
Pressure Relief & Circulation:
- Floating ball design enables pressure equalization during connections
- Controlled circulation for kill weight mud pumping
- No tool removal required for circulation operations
B. Material Excellence
Strength & Corrosion Resistance:
- API standard high-strength steel for pressure containment
- H2S resistant alloys prevent sulfide stress cracking
- Precision machining ensures reliable long-term performance
C. Sealing Reliability
High-Pressure Performance:
- Advanced seal technology maintains integrity under high differential pressure
- Dual-seal system provides redundant sealing capability
- Tested performance to 1.5x working pressure
D. Temperature Adaptation
Extreme Environment Operation:
- Special seal materials withstand -50°C to 190°C range
- Consistent performance in arctic and high-temperature applications
- Material stability maintained throughout temperature range
Field Application Benefits
Safety Enhancement
- Eliminates need for separate check valve – reduces potential leak points
- Automatic backflow prevention during connections
- Positive well control with manual override capability
Operational Efficiency
- Faster connections with integrated pressure equalization
- Simplified inventory – one tool replaces multiple components
- Reduced handling with fewer tools to install and maintain
Cost Effectiveness
- Eliminates separate check valve cost ($8,000-$12,000 per valve)
- Reduces connection time by 30-40%
- Minimizes training requirements with intuitive operation
