API Certified Roller Kelly Bushings from China Suppliers - High-Quality Factory Options for Efficient Drilling Operations
Roller Kelly Bushing Specifications
1. Light Duty Roller Kelly Bushing
| Model | 20-MDP | 17-MDP | LDS |
| Max Torque | 13729 N·m (10126 ft·lbf) | ||
| Drive Type | Square | ||
| Square Kelly Size | 63.5-133.35 mm (2 1/2-5 1/4 in) | ||
| Hexagonal Kelly Size | 76.2-107.95 mm (3-4 1/4 in) | ||
| Dimensions | 458×458×700 mm (18×18×27.5 in) | 508×508×700 mm (20×20×27.5 in) | |
| Weight | 460 kg (1012 lb) | 340 kg (750 lb) | 400 kg (808 lb) |
2. Medium-Duty Roller Kelly Bushing
| Model | 20-HDP | MDS |
| Max Torque | 13729 N·m (10126 ft·lbf) | |
| Drive Type | Square | Pin Shaft |
| Square Kelly Size | 63.5-133.35 mm (2 1/2-5 1/4 in) | |
| Hexagonal Kelly Size | 76.2-107.95 mm (3-4 1/4 in) | |
| Dimensions | 493×493×696 mm (19.4×19.4×27.4 in) | 510×510×720 mm (20×20×28.3 in) |
| Weight | 670 kg (1470 lb) | 420 kg (924 lb) |
3. Heavy Duty Roller Kelly Bushing
| Model | HDS | 27-HDP |
| Max Torque | 32365 N·m (23871 ft·lbf) | 22555 N·m (16636 ft·lbf) |
| Drive Type | Square | Pin Shaft |
| Square Kelly Size | 76.2-152.4 mm (3-6 in) | 63.5-133.35 mm (2 1/2-5 1/4 in) |
| Hexagonal Kelly Size | 76.2-152.4 mm (3-6 in) | 76.2-107.95 mm (3-4 1/4 in) |
| Dimensions | 630×630×740 mm (24.8×24.8×29.1 in) | 630×630×780 mm (24.8×24.8×30.7 in) |
| Weight | 700 kg (1540 lb) | 730 kg (1610 lb) |
Roller Kelly Features
Compatible with a wide range of Square and Hexagonal Kelly sizes.
Quad-roller precision design, four induction-hardened rollers reduce frictional resistance by up to 68% compared to solid bushings.
Available with various standard connection types to meet different rig configurations.
Frequently Asked Questions (FAQ)
What Kelly sizes are compatible with the Roller Kelly Bushings?
Our Roller Kelly Bushings are highly versatile. Depending on the specific model (Light, Medium, or Heavy Duty), they are compatible with Square Kelly sizes ranging from 63.5 mm to 152.4 mm (2 1/2 to 6 in) and Hexagonal Kelly sizes from 76.2 mm to 152.4 mm (3 to 6 in).
How much torque can the Heavy Duty Roller Kelly Bushings handle?
The Heavy Duty Roller Kelly Bushings are built for demanding applications. The HDS model can handle a maximum torque of up to 32,365 N·m (23,871 ft·lbf), while the 27-HDP model supports up to 22,555 N·m (16,636 ft·lbf).
What is the advantage of the quad-roller precision design?
The quad-roller precision design utilizes four induction-hardened rollers. This innovative structure significantly minimizes wear and reduces frictional resistance by up to 68% when compared to traditional solid bushings.
Are these bushings compliant with API standards?
Yes, all our Roller Kelly Bushings are designed with API compliant connections. They are available with various standard connection types to seamlessly integrate with different drilling rig configurations.
What types of drives are available?
We offer both Square and Pin Shaft drive types across our range of Light Duty, Medium-Duty, and Heavy Duty Roller Kelly Bushings to suit your operational requirements.
Can these bushings improve the service life of my equipment?
Absolutely. In a documented Middle Eastern rig operation, our heavy-duty pin drive bushings successfully reduced torque fluctuations by 35%. This performance improvement resulted in a 50% increase in Kelly service life compared to standard bushing systems.