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.
