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High Performance Extension Multicolor Friction Kelly Bar for Rotary Piling Rig
  • High Performance Extension Multicolor Friction Kelly Bar for Rotary Piling Rig
  • High Performance Extension Multicolor Friction Kelly Bar for Rotary Piling Rig
  • High Performance Extension Multicolor Friction Kelly Bar for Rotary Piling Rig
  • High Performance Extension Multicolor Friction Kelly Bar for Rotary Piling Rig

High Performance Extension Multicolor Friction Kelly Bar for Rotary Piling Rig

Place of Origin China
Brand Name APIE
Model Number Friction/Interlocking Kelly Bar
Product Details
Color:
Black ,yellow Or As Required
Material:
Q345B
Process:
Interlocking,Friction And Combined
Abrasion Resistance:
Strong
Kelly Bar Pipe:
Germany Imported Or Domestic High Strength Seamless
Usage:
Deep Foundations,building,bridge,high-speed Rail Etc
Service:
Customized Service Drilling Spare Parts
Tube Material:
Seamless Alloy Steel Drilling Spare Parts
Payment & Shipping Terms
Minimum Order Quantity
1 Set
Price
US$ 2000-10000 Set
Packaging Details
Nude packing
Delivery Time
30 days
Payment Terms
L/C,D/A,D/P,T/T,Western Union,MoneyGram
Supply Ability
30 Set/Sets per Month
Product Description

Product Description:

A Kelly bar is an essential element in hydraulic rotary drilling rigs, acting as a telescopic shaft that conveys both torque and crowd force from the rig to the drilling tool. This component is vital for achieving deep drilling, enabling the rig to penetrate greater depths. It plays a key role in numerous applications, such as foundation drilling, construction projects, and mining operations.

Kelly bars can be categorized into two primary types: friction kelly bars and interlocking kelly bars. Friction kelly bars derive their name from the frictional interaction between the rails of each segment. In contrast, interlocking kelly bars lack this frictional contact; instead, they feature drive ribs equipped with locking devices that enhance torque transfer to each section. Standard kelly bars are designed as fully lockable systems, incorporating a mechanical locking mechanism that connects each element to both the outer bar and the rotary drive.

Kelly bars play a vital role in the creation of boreholes using hydraulic rotary drilling rigs. They simultaneously transmit the torque from the rotary drive and the crowd pressure from the crowd system to the drilling tool. A kelly bar is comprised of multiple telescopic tubular sections featuring a system of drive keys and locking recesses welded onto their outer surfaces. Typically, standard kelly bars are equipped with six drive keys on each section. These tubular sections are crafted from high-tensile steel to achieve a balance of minimal weight and sufficient strength. Standard kelly bars are available as either friction kelly bars or fully interlocking kelly bars, compatible with various drilling rigs.



名称

Name

型号

Type

重量

Weight(T)

运输长度 钻孔深度

Transport

Length(mm)

Drilling Depth(m)

φ377 Friction Kelly Bar

φ377×5×12 6.0 55
13300

φ377 Interlocking Kelly Bar

φ377×4×12 7.0 13550 42

φ445 Friction Kelly Bar

φ445×5×13 10.0 14510 55

φ445 Friction Kelly Bar

φ445×5×15 11.5 16510 65

φ445 Interlocking Kelly Bar

φ445×4×12 9.5 13645 40

φ445 Interlocking Kelly Bar

φ445×4×15 11.5 16645 52

φ508 Friction Kelly Bar

φ508×6×15 15.0 16585 81

φ508 Interlocking Kelly Bar

φ508×4×12 10.5 13550 40




Features:


Kelly bars come with a range of standard features, including:

  • Telescopic configurations that vary from 2 to 6 elements for applications in piling
  • Depth capabilities that range from 10m to 110m
  • Torque transfer capacities between 80kNm and 500kNm
  • Choices of both interlocking and friction kelly bars
  • High-grade seamless steel construction
  • Six cams and drive ribs to enhance operational efficiency
  • A top flange for connecting the kelly bar to a kelly swivel
  • Upper and/or lower spring shock absorbers to improve stability
  • A square kelly box for easy attachment of drilling tools
  • A drive pipe that transmits torque and crowd force to the kelly bar

When choosing a kelly bar for a drilling rig, it is essential to focus on those made from high-quality steel with strong mechanical characteristics. Whether purchasing new or used kelly bars, look for products that come with origin and quality certifications to guarantee their reliability and longevity. Additionally, all kelly bars can feature a noise-damping system designed to reduce disruptive, high-frequency noise during operation. This system uses sound-absorbing materials on the outer section of the kelly bar, which are protected by steel plates.


High Performance Extension Multicolor Friction Kelly Bar for Rotary Piling Rig 0High Performance Extension Multicolor Friction Kelly Bar for Rotary Piling Rig 1


FAQ:
Q: How long is your delivery time?
A: Usually it is 5~10 days if the goods are in stock. Or it is 45 days if the goods are not in stock, it is according to quantity.


Q: What ‘s your terms of payment?
A: Payment<=100USD, 100% in advance. Payment>=1000USD, 50% T/T in advance balance before shipment. irrevocable LC at sight.


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