The reamer bits mainly consists of more than 3 cones.cutting structure with premium tungsten carbide hardfacing or premium tungsten carbide insert of formulas and new techniques is utilized,and increases wear-resistance capacibility of reamer.
1.Main sizes: Generally bit diameters: 311mm,346mm,500mm,800mm,900mm and so on, all sizes could be customized by requirements.
2.Application: Hole opener can enlarge a small well hole to bigger diameter in construction field,bridge construction,super highway construction,railway construction etc. This kind of bits are suitbale for different complex formation,shales,limestone,cobblestone and so on.
3.Cutting structure: the hole opener always have multi-cones.Bit cones are splited from tricone bits and welded to bulid a big diameter bit, the pilot is attched with hole opener
Cutting Structure
The reamer mainly consists of four or more cones.Cutting Structure with premium tungsten carbide hardfacing or premium tungsten carbide inserts of new techniques is utilized,and increase wear-resistance capability of reamer .The pilot is three cone bit.
Seal and Lubrication
High performance HNBR O-ring bearing seal and advanced grease for lubrication.
Product Application
It is suitable for the large size well,mining and infrastructure applications.
The size rang is from 28 to 36 inch,and IADC varies is 117,127,517,537.
Current Availability
| size |
| in |
mm |
| 28 |
711.2 |
| 30 |
762.0 |
| 32 |
812.8 |
| 36 |
914.4 |
| IADC |
WOB(kN/mm) |
RPM(r/min) |
Formation |
| 114\115 |
0.3-0.75 |
180-50 |
Soft formation with low compressive strength and high drillability,such as mudstone,clay,chalk,etc |
| 116\117 |
0.3-0.8 |
150-70 |
Soft formation with low compressive strength and high drillability,such as mudstone,clay,chalk,etc |
| 124\125 |
0.3-0.85 |
180-60 |
Soft formation with low compressive strength and high drillability,such as mudstone,clay,salt,loose stands,soft limestone,etc |
| 126\127 |
0.3-0.9 |
150-60 |
Soft formation with low compressive strength and high drillability,such as mudstone,clay,salt,loose stands,soft limestone,etc |
| 134\135 |
0.35-0.95 |
150-50 |
Soft to medium formation with low compressive strength or soft with harder streaks,such as mudstone,shale,soft limestone ,sands,etc |
| 136\137 |
0.35-1.0 |
120-60 |
Soft to medium formation with low compressive strength or soft with harder streaks,such as mudstone,shale,soft limestone ,sands,etc |
| 214\215 |
0.4-0.95 |
150-60 |
medium hard formation with high compressive strength ,such as medium soft shale,anhydrite,medium soft limestone ,medium soft sandstone as well as thick and hard streaks,etc |
| 216\217 |
0.4-1.0 |
100-60 |
medium hard formation with low compressive strength ,such as medium soft shale,limestone and sandstone as well as thick and hard streaks,etc |
| 244 |
0.35-0.95 |
150-50 |
medium hard formation with high compressive strength ,such as hard shale,sands ,limestone,etc |
| 246\247 |
0.4-1.0 |
80-50 |
medium hard formation with high compressive strength ,such as hard shale,sands ,limestone,etc |
| 324\325 |
0.4-1.0 |
120-50 |
hard formation with high strength and abrasiveness such as hard limestone,hard sands,dolomite,hard shale,etc |
Audited Supplier 
){kind=link}