Concentric System Symmetrix Overburden Casing System With Wings

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.

Different Structures:

Concentric system with ring bits,with wings and with blocks.

Operation Procedure

1. when the drilling starts, the wings swing out, and reams to drive the casing shoes and tubes into the hole.

2. When finished the drilling in overburden rock formations, reverse the drilling tools and the wings will get closed, and the drilling tools can be raised from the hole.

3. Next construction can be followed.

Steel:

first class special alloy steel with high strength, heat resistance and wearable

Carbide
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

How to complete the whole deal

Step:

1. Firstly decide the design, material and color

2. Decide the size in accordance with client's requirement and our

recommendation

3. We will give the best offer.

4. Client's accept the offer and we send proforma invoice.

5. Client transfers 30%-50% deposit and production begins

6. After production, we will send ready products photo

7. After client's confirmation, we will arrange shipment, and send

copy shipping documents like B/L, commercial invoice and

packing list

8. Client transfer balance payment and we will send original

documents by DHL or EMS

Changsha Tianhe Drilling Tools and Machinery Co., Ltd., is a professional geotechnical drilling tools manufacturer since 2002. We’re located in Jinzhou New District,Ningxiang County, Changsha,Hunan province.Our main products include DTH (down-the-hole) hammers and bits with capacity of drilling holes from 64mm--1020mm in diameter, DTH drilling tools with large diameter for deep hole drilling, eccentric casing system (ODEX) and concentric casing system, reserve circulation hammers and bits, drilling rig, rock drilling accessories and other relative equipment. They are widely used in mining,water well and geothermal drilling, anchoring, foundation and infrastructure, piling,tunneling and other construction and geotechnical engineering. They are exported to Sweden,Swiss,Finland,Italy, France, Germany, Australia,South Korea,South Africa,Chile, Brazi and other 30 countries.Teamwhole is proved to be the right choice by more than 1000 customers all over the world.

Our registered capital is 6.5 million USD, and monthly capacity is about 1000 sets of hammers. We have about 300 employees,among them there are 80 specialized technicians,30 of them have over 20 years working experiences in DTH drilling tools research and development. We have the ISO9001:2008 certificate,over 30 technical patents, and 3 registered trademarks.We’re a council unit of China Drilling Steel and Drilling Tools Association,the director unit of China Heat Treatment Association, the well-known trademark enterprise of Hunan Province, the high-tech enterprise of Hunan Province, the geotechnical drilling equipment engineering of Changsha City Technology research center and enterprise technology center.

The company always guide themselves with the service concept "focus on users' requirements and meet to customers" needs " , flexibly apply the unique technology, strictly comply with the standards of ISO9001 quality system, professionally commit to research, development and application, and sincerely produce the rock drilling tools with most specifications, easy operation, reliable quality and good prices for all the global users. With strong technical strength, we are making efforts to creat the best brand of Chinese drilling tools, and to be the top manufacturer in the world.