



IADC | WOB(KN/mm Bit Dia.) | RPM(r/min) | Applicable Formations |
435 515 | 0.20~0.70 | 200~80 | Soft with very low compressive strength such as shale ,clay, sandstone ,soft limestone ,etc |
535 | 0.35~0.80 | 200~80 | Medium soft with low compressive strength and harder abrasive stringers ,such as hard shale ,hared gypsolyte, soft limestone, sandstone and dolomite with stringer ,etc |
417 437 | 0.35~0.90 | 140~70 | Very soft with low compressive strength and high drillability, such as shale, clay, sandstone and conglomerate ,etc. |
517 527 | 0.35~1.05 | 120~50 | Soft with low compressive strength, such as shale, clay, sandstone, soft limestone, salt bed and hard gypsolyte, etc |
537 547 | 0.35~1.05 | 110~40 | Medium soft with low compressive strength and harder abrasive stringers, such as hard shale, hard gypsolyte, soft limestone, sandstone and dolomite with stringers ,etc |
617 627 | 0.35~1.05 | 80~40 | Medium hard with high compressive strength and thick &hard stringers, such as hard shale, limestone, sandstone and dolomite, etc |
637 737 | 0.70~1.20 | 70~40 | Medium hard with high compressive strength and high abrasiveness ,such as limestone ,dolomite, sandstone and chert ,etc |
Note: The upper limits of WOB and RPM in above table should not be used simultaneously |


OUR EQUIPMENT



Company Competitive Power:
1. Our strength lies in having the most professional and seasoned senior engineers, leading the field with unmatched expertise.
We proudly guarantee products of supreme quality.
2.MANUFACTURER Our strategic positioning ensures that we offer the most competitive prices in the market.
3. The foundation of our business is built on the integrity and dedication of our sincere sales team.
4. We cater to diverse needs with a wide array of sizes and dimensions available.
5. A robust inventory of bulk stock guarantees rapid and efficient delivery.
6. We offer the finest after-sales service, ensuring complete customer satisfaction.
We warmly welcome your inquiries and invite you to visit our state-of-the-art factory.
Information you may want to know before ordering:
2. Processing time of order Depending on the order quantity, it usually takes 15 days for production. If we have the stock you requested, it is only 2 or 3 days.
3. Shipping method Sample order: We recommend express delivery, such as DHL/UPS/TNT/FEDEX or air freight. Bulk order: We recommend air or sea freight.
4. Quality control We have our own experienced quality control.
Each order will be strictly inspected and tested before shipment.
5. After-sales service:
1. Our sales team will answer your questions within 24 hours (except holidays).
2. Technical support will be available at any time.
3. Once the failure caused by the quality of our products is confirmed, it will be replaced free of charge.
6. Are you a manufacturing company or a trading company?
We are a professional manufacturer.
7. Do you have a quality control system?
Yes, we check each production process and test the pressure of each tool to ensure that there is no problem.
8. How to buy products from you?
Very easy! Please leave me a message and tell me your requirements, let me know you are interested in our products. Will get the details with you soon.
9. Can you tell me your size and specifications?
1. Give me your drawings and detail requirements.
2. After you check our brochure, please give me the product number.
3. Don't forget to tell me the quantity, it is very important.
4. Tell me your size and specifications.
. Your destination port.