Symmetric Casing Systems with Ring Bit

1.In not stable rock formation, the casing is necessary to follow. 2.Usually in foundation or water well drilling, for large hole boring. 3.drilling depth is better less than 40 metres to control the hole well. larger depth is also available with other designs. 4.match to 12" hammer and 406mm casing tube. 5. air pressure is 25 Bar and air volumn is 1500 cfm. 6. the ring bit is left in the hole.
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Products Details

Product overview导航栏

 Adavantage

1. the concentric design is more reliable and less torque than the eccentric.

2. large impact power to make high speed drilling.

3. straighter hole.

4. easy to follow the casing.

5. reverse rotation and withdraw the pilot bit to use it for next holes.

Specification导航栏

A 

 B C D E

F
Outer Dia. of Casing Tube   Inner Dia. of Casing Tube Reamed Dia. Min. Inner Dia. of Casing Shoe  Hammer Type   Drill Pipes 
mm mm mm mm   mm
114 101-103 125 93 TDS79 60
140 124-127 152 113 TDS98 76
146 127-132 154 115 TDS98 76
168 149-155 184 138 TDS122 76,89
178 159-165 194 148 TDS122 76,89
193 173-180 206 164 TDS139 114
219 199-206 234 185 TDS139,TDS180 114
244 224-231 273 219 TDS180

114

Order Guide:  A+B+C+D+G

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