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Contact: Dr.Robert Roschen

Tel: +86-21-54994419

Mobile: +8613764195009

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Email: roschen@roschen.com

Web: www.roscenmining.com

Concentric Drilling And Casing System

Roschen CDC system can be used to install casings in many different types of overburdens, and in all types of natural formations. The CDC system drills straight holes and penetrates boulders easily. The system is designed for use with permanent casings, which are welded together progressively during drilling and left in the hole. It can be used to drill and case comparatively deep holes, depending on the application, hole inclination, and ground conditions.

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Concentric Drilling and Casing System for hard rock Overburden Tools Overburden Drilling Systems


Overburden tools, Roschen CDC Concentric system product range M50 168.3mm

 

Overburden tools
 


Below is a presentation of Halco systems of Overburden tools.
 

Systems

 

Roschen CDC Concentric system product range

 

CDC - Concentric Drilling and Casing system



Roschen casing advancing system quality can be replaced of by Halco tubex system, atlas copco casing advancing system basis on the quality grade, and in the after sales service.


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CDC type Casing, OD Casing wall Pilot diameter Reaming diameter Casing shoe Max. drill bit diameter
thickness diameter
  mm mm mm mm mm mm
M40 139.7 5,6 127.5 154 116 115
M50 168.3 6 155 182.3 142 140
M60 193.7 6 180 212 167 165
DHD340 139.7 5,6 127.5 154 116 115
DHD350 168.3 6 155 182.3 142 140
DHD360 193.7 6 180 212 167 165
TD40 139.7 5,6 127.5 154 116 115
QL50 168.3 6 155 182.3 142 140
QL60 193.7 6 180 212 167 165

 

 

 

 

Roschen CDC System

 

 

Roschen CDC system can be used to install casings in many different types of overburdens, and in all types of natural formations. The CDC system drills straight holes and penetrates boulders easily. The system is designed for use with permanent casings, which are welded together progressively during drilling and left in the hole. It can be used to drill and case comparatively deep holes, depending on the application, hole inclination, and ground conditions.

 

 

The system consists of a pilot bit and a concentric ring-bit/casing shoe assembly. The ring bit and casing shoe are delivered as a single unit, connected to each other via a rotary joint. These two components, together with a DTH hammer, the drill pipes and the casings, make up the complete system.

 

 

Roschen EDC TUBEX XL Product range

 

 

EDC - Eccentric Drilling and Casing system

 

 

TUBEX Casing, recom. size Min. wall Max. drill bit Reaming
XL type mm thickness diameter diameter
Max. OD/Min. ID mm mm mm
90 115/102 5 90 123
115 142/128 5 115 152
140 171/157 5 140 187
165 196/183 5,5 165 212
180 219/194 6,3 180 232
190 222/205 6,3 190 237
240 273/260 6,3 240 306
280 327/305 7,1 280 370



TUBEX XL

Roschen TUBEX XL tool systems for DTH hammers are designed to drill-and-case simultaneously through overburdens. When reaching the bedrock or required depth, the drill string is removed easily from the hole, leaving the casings in place. 




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