700mm 28inch Assembled Bit Hole Opener For Water Well And Vertical
Mine Drilling
The Hole Opener Advantage fully heat-treated alloy steel. With
cutters for Soft,Medium Hard format Straighter Holes - By drilling
a smaller hole with a "pilot" bit, then attaching that said bit
onto the bottom of the the hole opener. The hole opener will follow
the path of the hole drilled by the smaller bit. Larger Holes with
Smaller Rigs - By drilling a hole in stages, larger holes can be
drilled with smaller rigs. A smaller hole requires less power.
Replacing Cutters and Cutting Cost - On most Hole Opener designs,
the cutters can be easily replaced. The cost to replace a cutter is
a fraction of the cost to replace a large tricone rock bit. Cost of
Large Rock Bits - Larger diameter rock bits not only cost a lot,
they can be difficult to find. A more economic solution is to use a
hole opener that uses smaller tricone rock bit segments..
| Reamer size(inch) | 9-78 |
| Center pipe diamater | 90-230 |
| Thread connection | Pin*box (IF,REG,NC,FH) or as ordered |
| Application | Application Expanding rock holes in water wells, oil wells, natural
gas wells, mine shafts, etc. Advantages: Low cost and high
performance-to-price ratio. Dramatically reduce drilling costs |
