The roller kelly bushing is a vital tool in oil drilling operations, designed to work seamlessly with the rotary table bushing to drive the kelly. Equipped with four rollers, this bushing minimizes friction between the kelly and the bushing, significantly extending the service life of the kelly. Compatible with both square and hexagonal kellys of various sizes, it offers versatile solutions for different drilling applications. The bushing connects to various rotary tables and is available in two rotation forms: square rotation and pin shaft rotation. Manufactured in compliance with API Spec 7K “Drilling Equipment Specification,” it meets stringent industry standards for design and production.
Key Features:
- Friction Reduction: Four rollers reduce friction between the kelly and the bushing, extending kelly lifespan.
- Versatility: Compatible with a wide range of square and hexagonal kelly sizes.
- API Spec 7K Compliance: Meets industry standards for reliability and safety.
- Multiple Connection Options: Available in square rotation and pin shaft rotation forms for flexible use.
We can also source similar or related equipment and parts from China to meet your specific requirements.
Specifications Tables
1. 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) |
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. 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) |
Applications and Role
The roller kelly bushing plays a critical role in reducing friction and wear between the kelly and the rotary table bushing, thereby extending the kelly’s service life. This bushing is essential for ensuring smooth and efficient drilling operations, accommodating various sizes of square and hexagonal kellys. By reducing friction, the bushing helps maintain the integrity of the drill string and enhances the overall efficiency of drilling operations.
