8 1/2 Inches PDC Drill Bit M137 for Very Hard Rocks Drilling
- Manufacturer: Hebei Solidkey petroleum machinery co;ltd
Medium-hard to hard formations with lowcompressive strength , such as hard shale, limestone, sandstone, dolomite, hard gypsum,marble, etc.
Cangzhou, China251mm Roller Cone Bit Replaceable Block For Hard Rocks Drilling HDD Rock Reamers
- Manufacturer: Hebei Solidkey petroleum machinery co;ltd
Hard formations for high compressive strength, such as sandstone, hard shale, dolomite, hard gypsum, chert, granite, etc.
Cangzhou, China
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