Interlocking/Friction Kelly Bar For Bauer Rotary Drilling Rig
Contact us:
TEL: 0086-0731-84078482
Email: cecilia@hm-machinery.com
Quick Details
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Packaging & Delivery
| Packaging Details: | as per customer requirement |
| Delivery Detail: | 15 days |
Product Description
Kelly Bar Description
Kelly bars are key components in the execution of boreholes by hydraulic rotary drilling rigs. Teleskopic Kelly bars transfer torque and crowd force from the rotary drive to the drilling tool. Hunan HM Machinery Co is a highly specialized manufacturer of telescopic kelly bars to be applied to any type of piling rig available in the market such as Bauer, Sany, Xcmg, Zoomlion, Sunward, Soilmec, IMT, Mait.... Kelly bars are featuring specific
construction details:
• 2 - 5 fold telescopic
• the tubular kelly sections are manufactured from high-tensile steel to ensure minimum weight at adequate strength
• torque transfer capacity • interlocking kelly bar type • friction kelly bar type • locks and wear-resistant drive rails (accordingly with rotary sleeve) • Robust Terminal joints, that are the terminal part of each telescopic pipe, provided to transfer torque and crowd force to the kelly bar • bottom shock absorbers • standardised square kelly drive stub for connecting all types of drilling tools HM Machinery Co kelly bars |
Interlocking Kelly Bar
Interlocking kelly bar system are especially designed for drilling into hard materials and when crowd force application is required.Locking kelly bars are provided with drive rails designed with locking pockets on their length and corresponding termina joints locking guides. The purpose is to interlock each telescopic element to the inner following one in order to apply the maximum torque and crowd force developed by the base rig.Therefore the rotary table inner drive is also equipped with locking pockets,. When extracting the locking bar from down the hole, the combination of lifting and rotating counterclockwise will allow the telescopic element to unlock. interlocking Kelly bars are usually supplied with 3 or 4 telescopic elements.
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Friction Kelly Bar
Friction kelly bar derives its name from the means by which it transfer torque to the drilling tool. The telescopic elements are advanced by using the “frictional contact” from each of the friction drive rails that run down the outside of each kelly bar. These drive rails, on the outside of each kelly bar, are driven by the rotary table and the terminal joints of each successively larger diameter kelly bar. The terminal joint is long piece on the inside and at the bottom of each kelly bar. Friction kelly bars are normally supplied in 4 or 5 telescopic elements as they are mostly used for deep piles in medium hard soil conditions.
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Why choose us
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Step 1: Market Research Before Design Kelly Bar
During March,2009- Oct,2009, our company random statistical failure kelly bars which were from different kelly bar manufacturers in the market, total 50 cases, we sumarized and analysis:
the top problem with kelly bar quality issues are kelly bar stuck and kelly pipe crack which you can find from above marketing research report.
 Our Technical-Inner Key |
Our Structure Features:
1)Good design of kelly pipe system
2)Big Gag between each kelly pipe
3)Thick Inner and outer key
4)Arc slab structure
5)Waist-full form and plug welding
Our Technical Advantage:
1）Big Gap can get space for welding more thick key which can increase contact area during torque transfer and pressing
2)Reduce Kelly Bar Stuck Ratio
3)Not use 1 m pipe joint welding technical can get well straightness and reduce welding stress
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Our Technical-Key Layout
Structure Features:
1)Overlab joint Structure for Inner key and outer key
2)Proper gap between inner key and outer key
Technical Advantage:
1)Reduce the ratio of kelly bar stuck,kelly pipe stick, key slipping;
2)Proper gap can reduce the contract time and delivery impact force of inner key and outer key
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Our Technical-Pressing Point
Structure Features:
1)Plug welding for pressing position;
2)Alloy sintering technical inlay abraision-resistant alloy power(tungsten caribide, nickel)
Technicl Advantage:
1)Increase welding strength;
2)Increase pressing position wear resistant property;
Step 3: Kelly Bar Application Case
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Step 4: How to select Kelly Bar
Please fill below form and send email to us or get technical support from us to choose right kelly bar for you
   
Packing & Delivery
Our Company
Factory and Offices
Work Shop and Store
 Fair Show: Bauma China Exhibition-2010  Our Quality Control
1 Kelly Bar Technical Agreement with Drawing
- Offer kelly bar operation parameter
( Rig Machine
2 Material Quality Report
- Offer all material quality report
- choose the top
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- Offer Quality supervision and inspection record document for each manufacture procedure
- Technology standard for each procudure
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FAQ
1: Are you manufacturer?
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2: How is your kelly bar quility?
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3.What kind of kelly bar can we provide?
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4. What warranty do we provide?
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5. What payment terms do we accept?
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4. What warranty do we provide?
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5. What payment terms do we accept?
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Hunan HM Machinery Co.,Ltd.
湖南恒迈机械有限公司
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