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Outside Dia 219mm Overburden Drilling Systems With 3pcs Blocks ISO9001 Approval

Outside Dia 219mm Overburden Drilling Systems With 3pcs Blocks ISO9001 Approval

Outside Dia 219mm Overburden Drilling Systems With 3pcs Blocks ISO9001 Approval

Product Details:

Place of Origin: Hunan, China (Mainland)
Brand Name: teamwhole
Certification: ISO9001
Model Number: Concentric casing system

Payment & Shipping Terms:

Minimum Order Quantity: 1 Set
Price: Negotiation
Packaging Details: Wooden outer , and cartons inner
Delivery Time: 15 work days
Payment Terms: L/C, T/T
Supply Ability: 500 Set/Sets per Month
Detailed Product Description
Machine Type: Drilling Tool Material:: Alloy Steel
Processing Type:: Forging, Forging Use: Well Drilling, Water Well Drilling
Blocks: 3pcs Drill Pipes: 219mm

219mm Concentric Casing system with blocks.

Reliable performance, easy retrieval. 

General Introduction

Application Range:
It is recommended to drill in rock formation where contains some ovals and fracture.
Design Principles:
The stabel and reliable working performance and the less vibration of drill rig.


1) Block rotation direction has large bevel angel to increase stability.

2) Bevel designed block back guides the drilling tools through the casing when the pilot bit is pulled up for easy recovery.
Operation Procedure

1. When drilling starts, the pilot bit drives the ring bit down to the hole, followed the casing shoe and casing tube.

2. When arriving the bedrock, reverse rotation of the tools and pull the pilot bit out from the hole, leaving the ring bit the hole.

3.Perfuse the concrete or move to the next construction procedure.

Raw Material

first class special alloy steel with high strength, heat resistance and wearable
The best tungsten carbides from China are commonly applied.
Tungsten carbide from European is also available.



  • 1. Drill in overburden unstable rock.
  • 2. One step to drill and follow casing
  • 3. Flexible to open or close.
  • 4. Long service life
  • Outside Dia 219mm Overburden Drilling Systems With 3pcs Blocks ISO9001 Approval


Quality Warranty

Our company response for any quality problem caused by material or machining defect.


It is suitable for drilling water wells,geothermal wells, short micropiles medium mini-type grouting hole of building, dam and harbor project.

Our Service

Teamwhole offers the market most comprehensive range of DTH hammers. There are hammer solutions for water well drillers, miners and quarry drillers as well as for contractors in construction, oil and gas. Teamwhole's DTH hammers are available in holes sizes from 3.5 to 48 inches in diameter.
Teamwhole's flexible and stable ODEX system wins great reputation in users. Reliable quality,innovative design and professional service ensure the fulfill of many projects.
We even offer reverse circulating RC hammers for exploration. We are the earliest in China for RC since 2004. Now the RC hammer and bits are delivered to Australia,South Africa,Russia and Mongolia in large scales.
More than 30 experts supports the technology and enhance the development.
Offer the guide service for assembly and problem-analyse service during using.


Northern Europe: foundation, piling
Western Europe: water well and geothermal drilling
Russia: Oil, infrastructure and mining.
South east asia: mining and geothermal
South Africa: mining and water well drilling
Middle east: water well drilling
Oceania: mining, exploration and water well drilling
South America: water well drilling and mining

Contact Details
Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.

Contact Person: Ms.chen

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