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A B C
Outer Dia. (mm) Inner Dia. (mm) Length (m)
108 93 1 1.5 2
114 101 1 1.5 2
127 114 1 1.5 2
146 127 1 1.5 2
168 149 1 1.5 2
178 159 1 1.5 2
183 163 1 1.5 2
193 173 1 1.5 2
203 183 1 1.5 2
219 199 1 1.5 2
244 224 1 1.5 2
273 251 1 1.5 2
323 301 1 1.5 2
406 382 1 1.5 2
457 133 1 1.5 2
508 483 1 1.5 2

 

small-productApplication Range: It is suitable for drilling water wells, geothermal wells, short miscopies, medium mini-type grouting hole of building, dam and harbor project.

Design Principles: Make the casing follow easy and the equipment and operation simple.

Outstanding Advantages´╝ÜSimple structure, easy operation, reliable quality, retrievable drilling tools, and long service life.

 

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A: Discharge Head B: Drill Rod C: Guide Sleeve
D: DTH Hammer E: Casing Tube F: Guide Device
G: Casing Shoe H: Reamer I: Pilot Bit
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1ÒÇüWhen drilling starts, the reamer opens and enlarges the hole to drive the casing shoe and casing tube down.
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2ÒÇüWhen the drilling in over-burden formation is finished, reverse the rotation to close the reamer, then the assembly can be pulled up through the casing tube.
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3ÒÇüThe casing tube can be left in the hole, or can be pulled out by means of grout sealing material.
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4ÒÇüUse the normal drilling tools to drill and achieve to the desired depth.