What is a kelly bar ?
A hollow bar attached to the top of the drill column in rotary drilling rig.
Usuall there are interlocking kelly type,frictional kelly type,full-interlocking kelly type and combined interlocking type.
Round and square type both can be tailored according to clients request.
| OEM/ODM | Both |
| Material | Q345B /Q460D / 35CrMo With Special Heat Treatment |
| Manufacture Process | Robot Welding ,Gas Shielded welding , Manual DC Welding |
| Tailored | Round /Square |
Specification
| No. | Diammeter of The First Section | Sections | Key Pressure Type | Length of per section(m) | Drill depth | Torque(KN.M) |
| 1 | ¢299 | 3 | | | Interlocking | 9-12 | 24-45 | 100 -120 |
| 2 | ¢342 | 3 | 4 | | Interlocking | 9 - 12 | 24-45 | 100 -120 |
| 3 | ¢355 | 3 | 4 | | Interlocking | 9 - 14 | 24 - 56 | 100-120 |
| 4 | ¢368 | 3 | 4 | | Interlocking | 9 - 14 | 24 - 56 | 150-180 |
| 5 | ¢377 | 3 | 4 | | Interlocking | 9 - 14 | 24 - 56 | 150-180 |
| 6 | ¢394 | 3 | 4 | | Interlocking | 9 - 15 | 24 - 58 | 180-200 |
| 7 | ¢406 | 3 | 4 | | Interlocking | 9 - 15 | 24 - 58 | 180-200 |
| 8 | ¢419 | 3 | 4 | | Interlocking | 9 - 15 | 24 - 58 | 200-230 |
| 9 | ¢440(445) | 3 | 4 | | Interlocking | 9 - 15 | 24 – 58 | 220-260 |
| 10 | ¢470 (482) | 3 | 4 | | Interlocking | 9 - 16 | 24 – 60 | 220-260 |
| 11 | ¢508 | 3 | 4 | | Interlocking | 9 – 18 | 24 – 68 | 260-360 |
| 12 | ¢530 (540) | 3 | 4 | 5 | Interlocking | 9 – 20 | 32 – 92 | 320-400 |
| 13 | ¢580(575) | 3 | 4 | 5 | Interlocking | 9 – 20 | 32 – 92 | 360-420 |
| 14 | ¢630 | 3 | 4 | 5 | Interlocking | 9 - 22 | 32 - 102 | 400-500 |
Our company founded in 2004, headquartered in Beijing, branch factory in Shouguang, Shandong. The company is mainly engaged in the production and sales of rotary piling kelly bars , drilling tools, rotary piling rig overhaul, rig sales and accessories supply.
Over the years we focus on research and development of the production of kelly bars, drill tools, with complete kelly bars fabriction and testing equipments, as well as we own professional research , design, sales and after-sales service team. Our company has a number of self-developed patented products, matched with domestic and abroad brands such as SANY, CRRC, XCMG, Bauer, Soilmec, IMT and other brand rigs , exported to Southeast Asia, the United States, Russia, the Middle East and other countries.
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