Application:Friction kelly bars are normally supplied in 4 or 5 telescopic elements, they are mostly used for deep piles in in silt,clay and less dense sand and gravel.
Kelly sections: Kelly bar 2-5 sections.
Type: Interlocking/friction/combined kelly bar.
Size:Diameter range from 355mm-630mm.
Friction Kelly bar is another type of kelly bar, which the external key is composed of 3 or 6 wear -resistant strip without lock recesses.This kelly bar can form pressure force when the kelly bar is rotary.can produce peripheral force and the rotary passing down the pressure force,can produce the friction force.This kelly bar has the advantage of operating sample ,drilling deep,but with less pressure transmission.
|Model||Drilling depth（m）||A（mm）||B（mm）||D（mm）||Total weight（T）|
|5 sections Friction φ377-5*10m||45||10190||46700||11400||5.08|
|5 sections Friction φ377-5*12m||55||12190||56700||13400||6.10|
|5 sections Friction φ406-5*13m||58||13075||60800||14570||8.02|
|5 sections Friction φ406-5*15m||68||15075||70800||16570||9.27|
|5 sections Friction φ445-5*13m||58||13075||60800||14570||9.79|
|5 sections Friction φ445-5*15m||68||15075||70800||16570||11.30|
|5 sections Friction φ419-5*13m||58||13075||60800||14570||8.98|
|5 sections Friction φ419-5*15m||68||15075||70800||16570||10.17|
|5 sections Friction φ470-5*13m||58||13075||60800||14570||11.05|
|5 sections Friction φ470-5*15m||68||15075||70800||16570||12.75|
|6 sections Friction φ508-6*13m||68||13075||60800||14580||12.7|
|6 sections Friction φ508-6*15m||81||15075||70800||16580||14.65|
|6 sections Friction φ580-6*18m||99||18050||98000||19750||20.54|
|6 sections Friction φ580-6*20m||110||20050||110000||21750||22.82|
|5 sections Friction φ530-5*16m||72||16050||88000||17750||15.30|
|5 sections Friction φ530-5*18m||82||18050||98000||19750||17.21|
|6 sections Friction φ630-6*20m||110||20050||113300||21700||25.89|
|6 sections Friction φ630-6*24m||130||24050||137300||25700||31.07|
|Other types can be manufactured as per customers’ demand.|
The core R&D, processing and production personnel are all from the leading enterprises of this industry, with more than ten years of experience in the design and manufacture of kelly bars. We have provided tailor-made Kelly bar and technical services for almost all the well-known brand names of rotary drilling rigs both at home and abroad.
The steel pipe used in the Kelly bar comes from the selected materials made by the first-class steel enterprises at home and abroad. The yield strength and service life are more than doubled compared with the general-purpose products, meeting the rigorous requirements in drilling soft soil and various strata.
The core parts of Kelly bar, such as square head, driving keys, and pressurizing point are made of imported steel, and go through special heat treatment and surface strengthening treatment, which not only features high yield strength, wear resistance, impact resistance, strain capacity, welding property and corrosion resistance, but also meets the high reliability requirements of kelly bar in the construction ofhard rock, large diameter and super deep piles.
From the strict control of raw materials to multi-layer and multi-step precise welding, we comply with strict quality standards and monitoring systems in all aspects of kelly bar production to ensure 100% highstandard quality. We are also the first kelly bar manufacturer in China to provide customers with a one-year warranty.