High-Strength Lifting Nipple: Drill Collar Performance in a Compact Package
The Heavy Lifting Challenge
In drilling and completion operations:
-Improper lifting points cause costly damage to premium threads
-Weight limitations of standard lift subs risk dropping expensive BHA components
-Connection mismatches lead to cross-threading and thread galling
Our lifting nipple delivers:
✅ Drill collar equivalent mechanical properties
✅ API spec connections for perfect thread engagement
✅ 250-ton working load capacity
Engineered for Heavy Loads
Material Science Excellence
Property | Standard Lift Sub | Our Lifting Nipple |
Yield Strength | 100-120 ksi | 135-155 ksi |
Impact Toughness | 40-50 J @ -20°C | 60-80 J @ -40°C |
Hardness | HRC 22-28 | HRC 28-32 |
→ AISI 4145HM modified alloy steel
→ Full quench and temper heat treatment
→ Ultrasonic testing on every unit
Technical Specifications
Parameter | Specification |
Size Range | 2-7/8" to 7-5/8" OD |
Thread Types | API REG, IF, FH, DS (double-shoulder) |
Working Load | 50 to 250 tons |
Shoulder Types | Straight shoulder / Tapered shoulder |
Material Grades | 4145HM, 4140, 4130 |
Compliance | API Spec 7-1, API RP 7G, ISO 10407-2 |
Design Configurations
Straight Shoulder Design
-Applications: Standard drilling operations
-Advantages: Maximum shoulder contact area
-Torque Capacity: 25,000 ft-lbs to 80,000 ft-lbs
Tapered Shoulder Design
-Applications: High-pressure sealing applications
-Advantages: Pressure seal to 15,000 psi
-Torque Capacity: 30,000 ft-lbs to 100,000 ft-lbs
Manufacturing Excellence
✅ Precision Threading
CNC machined to API spec tolerances
100% thread gauge inspection
✅ Heat Treatment
Controlled atmosphere quenching
Tempered to optimal hardness
✅ Surface Treatment
Phosphate coating for corrosion resistance
Optional hard banding for wear protection
Operational Benefits
✅ Safety Assurance
4:1 safety factor on all ratings
Non-destructive testing on every unit
✅ Connection Protection
Prevents damage to premium drill string connections
Perfect thread match to API specifications
✅ Versatility
Fits all makes of elevators and spiders
Multiple connection options available
Field Applications
BHA Handling: Safe lifting of bottom hole assemblies
Casing Running: Heavy weight casing string support
Completion Operations: Christmas tree and wellhead installation
Workover Operations: Tubing and drill pipe handling
Offshore Operations: DNV GL certified for marine applications
