Roller Kelly Bushing
Tool Description
The roller kelly bushing is the main tool allocated for drilling equipments, and available with different specifications according to different kelly sizes, there are also different types in each specification which are light and heavy type . The roller kelly bushing has two driving methods: four-pin driving and four-direction driving.
Technical parameters and specifications
Kelly size | Four-pin driving | Four-direction driving | ||
in | mm | Center distance(mm) | Pin Diameter(mm) | Across side (mm) |
3 1/2 | 88.9 | 654.05 | 82.9 | 332/342 |
4 1/4 | 107.95 | |||
5 1/4 | 133.35 |
CONOVA has a rigorous, efficient, and professional technical service team, including technical consultation, solution design, downhole tool customization, on-site technical services, and oil and water control effects evaluation.
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