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| Customization: | Available |
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| Customized: | Customized |
| Standard: | API |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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| 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 | |||||








Q1: Can you customize drill bits for specific drilling conditions?
A:Yes, we can customize drill bits to meet specific drilling conditions and requirements, including custom sizes, shapes, and features.
Q2:What is your payment term?
A:We usually accept T/T , L/C and other secure payment options.
Q3: How about the delivery time?
A: Generally, it will take 15 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q4: What's the size range of your bits?
A: The size of Steel Body Bit is from 4-1/8'' to 26''; The size of Matrix Body Bit is from 3-1/2'' to 17-1/2''.
Q5: Do you offer technical support?
A: Yes, we provide comprehensive technical support and after-sales service.
Q6: How do you guarantee your quality?
Answer: All of our production are in lines of ISO9001 and API 7-1 certifications
https://annengjie888.en.made-in-china.com