| Customization: | Available |
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| After-sales Service: | 1 Year |
| Warranty: | 1 Year |
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SUZHOU ENERGY TOOL CO., LTD is established specially for serving Oil and Gas Industry by providing Drilling Equipment and Spare Parts. Our strength is at Drilling, PDC bits (steel and matrix), Tricone bit, under-reamer and mud motor.. All equipment is API certified and have been well tested and commissioned before delivery.
♦Advanced technology&Equipment, International standard.
♦R&D center for rock drilling tools, high precision CNC machines, API&ISO Certified.
♦10+ Years & 30 Countries service experience.
♦Optimized solutions for various of requirement.
| Table of classification of formation hardness and bit selection | |||||
| Roller cone bit | IADC code of diamond bit | Formation description | Rock type | Compressive strength(Mpa) | ROP(m/h) |
| IADC code | |||||
| 111/124 | M/S112~M/S223 | Very soft:sticky soft formation with low compressive strength. | Clay | <25 | >20 |
| Siltstone | |||||
| sandstone | |||||
| 116/137 | M/S222~M/S323 | Soft:soft formation with low compressive strength and high drillability. | Clay rock | 25~50 | 10~20 |
| Marl | |||||
| Lignite | |||||
| sandstone | |||||
| 417/527 | M/S323~M/S433 | Medium soft:soft to medium formation with low compressive strength and steak. | Clay rock | 50~75 | 5~15 |
| Marl | |||||
| Lignite | |||||
| Sandstone | |||||
| Siltstone | |||||
| Anhydrite | |||||
| Tuff | |||||
| 517/537 | M322~M443 | Medium:medium to hard formation with high compressive strength and thin abrasive streak. | Mudstone | 75~100 | 2~6 |
| Dark rock | |||||
| shale | |||||
| 537/617 | M422~M444 | Medium hard:hard and dense formation with high compressive strength and medium abrasiveness. | Dark rock | 100~200 | 1.5~3 |
| Hard shale | |||||
| Anhydrite | |||||
| Sandstone | |||||
| Dolomite | |||||
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