Q345B Steel Roller Bit Core Barrel , Rock Core Barrel With 8-1/2 Single Roller

Product Specification

Foundation Piling Spare Parts Hard Rock Drilling Tools Core Barrel With 8-1/2 Single Roller Bits

• Core barrel is used for cutting annular ring in rock, concrete and in steel reinforced concrete;
• consequentially the centre core can be broken using rock auger or cross core barrel.
• Using core barrel is possible to increase considerably pressure and torque on the cutting ring which can be equipped with different type of roller bits. 

Cases of Core Barrel With Roller Bit

What Advantages Do Core Barrel With Roller Bit Provide?

Core barrels are designed to operate on the principle of cutting by thrust indentation and shearing rotation, also called the “twisting and tearing” method resulting in a “rock crushing” mechanism depending on the rock strength and other rock characteristics.

The core barrel can be described as a cylindrical steel casing which is fitted with a series of single cone shaped roller bits at the bottom end to drill rock sockets for bored piles. Each roller bit is fitted with a series of tungsten carbide insert buttons for drilling.

Kellyway Core Barrels with roller bits can crack rock with a width approximately equal to the diameter of the roller bit. Therefore, when the drill progresses, a rock core is created and it grows inside the cylindrical body. However, if the diameter of the hole is large, the crack weakens the rock core but not enough to allow its breaking point and extraction. 

• Cutting Structure

Reaming bit mainly consists of four or more cones. Main cutting tooth is Tungsten Carbide insert tooth and steel tooth welded new-type wear- resistant alloy. High quality tungsten carbide tooth of new formula and new technique increases the service life of reaming bit. The pilot is roller cone bit or drag bit.

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• Seal and Lubrication

The bearing seal applys high performance O-ring seal or metal sealed bearing and imported lubrication grease special for bit.

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• Product Predominance

1.It is applied in the big size casing well section, mining and infrastructure building drilling.
2.core barrel with roller bits is used in very strong rock formations(compressive strength>100Mpa).
3.Rock Drilling Core Barrels with Roller Bits adopt the high-carbon steel and special drilling bits angle to keep the drilling strength and efficiency.

Factory Product Pictures

In What Applications Can Core Barrel With Roller Bit Be Used?

• Core Barrel with roller bits is used in very strong rock formations(compressive strength >100Mpa).
• Core Barrels are used when conventional augers are less effective or in conjuction with tapered rock augers for very hard rock drilling.
• The Core Barrel is designed with cutting edge to maximise the penetration rate through less contact surface area having to be cut and removed.

Shipping & Delivery

How Are Core Barrel With Roller Bit Installed?

The core barrel is usually fitted with roller bit which is full with tungsten carbide drill buttons and will cut into the rock as it rolls along. 

It is important to apply sufficient thrust force for biting or indentation as well as cutting force through the rotational torque to produce sufficient damaging stress.

Rock resulting in cracks and chips at the contact area between the drill button and the rock face. While entering the rock face, the material in front and below the button will be initially compressed by loading.

Jobsite

Q1. How long have you been in this business?

Over 10 years experience.

Q2. Do you accept sample order?
Yes sure, please contact us for details.

Q3. How about your after-sales service?
We offer promote technology support for all problems and questions.

Besides, we accept goods return or replace for quality problem.

Q4. How does your company control the quality?

Quality first. In order to guarantee high quality for our products.

Kellyway makes a serious inspection for all products and raw materials in strict procedure.

1. Prompt delivery
2. Best after-sale service
3. The products could be produce according to customer's requirements
4. Inquiries are typically replyed within 24 hours