Kelly Cock Valve: Manual Well Control Safety Valve for Drill Strings
The Emergency Shutdown Challenge
During drilling operations, uncontrolled flow causes:
-Blowout risks when kicks occur during connections
-Expensive mud loss (>$50K/hour in deepwater)
-H2S exposure to personnel without proper barriers
Our kelly cock valves deliver:
✅ Instant 90° shutoff with specialized wrench
✅ 15,000psi working pressure rating
✅ NACE MR0175 compliance for sour service
Dual-Valve Protection System
Upper Kelly Cock
Location: Between swivel and kelly
Function: Primary barrier during tripping
Pressure Rating: 15,000psi WP
Lower Kelly Cock
Location: Between kelly and drill pipe
Function: Secondary barrier during drilling
Pressure Rating: 15,000psi WP
Technical Specifications
| Parameter | Specification |
| Pressure Rating | 5,000psi, 10,000psi, 15,000psi options |
| Temperature Rating | -50°C to 175°C (H2S service) |
| Material Grades | 4140 steel, AISI 4130, F22, alloy 625 |
| Connections | API REG, IF, FH (all standard sizes) |
| Operation | 90° manual rotation with special wrench |
| Compliance | API Spec 7, API RP 7G, NACE MR0175 |
Operational Benefits
✅ Instant Well Control
5-second closure during emergency situations
Dual barriers for redundant protection
✅ H2S Ready
Sour service materials prevent sulfide cracking
NACE testing on every valve
✅ Minimal Maintenance
Hard-coated ball resists erosion
Field-replaceable seals for multiple runs
Field Applications
High-Pressure Drilling: 15,000psi rating for HPHT wells
Sour Gas Fields: NACE MR0175 compliance for H2S service
Deepwater Operations: Reliable backup to BOP stack
Arctic Drilling: Low-temperature operation to -50°C
