8-1/2" PDC Bit Field Case: 669m Drilling in Taiyuan Formation, Su 75-48-22X Well
Company: Shaanxi Hainaisen Petroleum Technology Co., Ltd
Website: https://www.hnsdrillbit.com
1. Project Background
The Su 75-48-22X well, operated by Well Team 3677, targets the Taiyuan Formation in the Ordos Basin. This formation is characterized by tight sandstone with high abrasiveness and interbedded hard layers, which historically posed significant challenges for conventional PDC bits: low ROP, short footage, and frequent bit trips that increased drilling costs and operational risks.
Hainasen was tasked with delivering a high-performance PDC bit solution to maximize single-run footage, improve mechanical ROP, and reduce non-productive time for the customer.
2. Bit Specification & Application Parameters
| Item | Details |
|---|---|
| Bit Size & Model | 8-1/2" SD6545 PDC Bit |
| Bit Serial No. | A2902 |
| Well Team | 3677 |
| Well No. | Su 75-48-22X |
| Drilling Interval | 3008m – 3677m |
| Target Formation | Taiyuan Formation |
| Total Footage Drilled | 669m |
| Net Drilling Time | 59h |
| Average Mechanical ROP | 11.34m/h |
3. On-Site Performance & Customer Feedback
3.1 Field Performance Highlights
- Exceptional Single-Run Footage: The SD6545 bit completed 669m of continuous drilling in the abrasive Taiyuan Formation in a single run, eliminating the need for intermediate bit trips and saving over 20 hours of tripping time compared to offset wells.
- Stable High ROP: Maintained an average mechanical ROP of 11.34m/h throughout the entire interval, outperforming competitor bits in the same block by 30%+ and significantly shortening the overall drilling cycle.
- Excellent Bit Integrity: Post-drilling inspection confirmed minimal wear on the PDC cutters and stable gauge retention, proving the bit's outstanding impact and abrasion resistance in hard, interbedded formations.
3.2 Customer On-Site Feedback (Well Team 3677)
"We've used bits from multiple suppliers in the Taiyuan Formation of the Su 75 block, and Hainasen's SD6545 is the best-performing one we've ever run. The 669m single-run footage and 11.34m/h average ROP far exceeded our expectations. The bit stayed stable throughout the entire interval, no vibration, no gauge loss, and we didn't have to make an extra trip for bit change, which directly cut our drilling cost by nearly 15% for this section. We will definitely continue to use Hainasen's PDC bits in our future wells in this block."
4. Technical Advantages of Hainasen SD6545 PDC Bit
The SD6545 bit is a custom-engineered solution for hard, abrasive formations, developed by Hainasen's R&D team with over 10 years of field experience in the Ordos Basin:
- Premium PDC Cutters: Equipped with Hainasen's self-developed high-wear-resistant PDC composite sheets, featuring optimized diamond grain distribution and bonding strength, delivering 2x longer service life than conventional cutters in abrasive sandstone.
- Optimized Hydraulic & Cutting Structure: The unique blade profile and cutter placement design ensure efficient cuttings removal, reduce bit balling, and maintain stable ROP even in high-density drilling fluid conditions.
- Robust Bit Body: Forged steel body with enhanced impact resistance, effectively resisting shock and vibration in interbedded formations, preventing bit damage and ensuring long-term reliability.
- Customized Design: Tailored to the geological characteristics of the Taiyuan Formation in the Ordos Basin, balancing aggressiveness and durability to achieve maximum footage and ROP simultaneously.
5. Conclusion
This field case fully verifies the outstanding performance of Hainasen's SD6545 PDC bit in hard, abrasive formations. The 669m single-run footage and 11.34m/h average ROP in the Su 75-48-22X well not only brought significant cost savings and efficiency improvements to the customer but also further consolidated Hainasen's leading position in the domestic PDC bit market for complex formations.
Shaanxi Hainasen Petroleum Technology Co., Ltd is committed to providing customers with high-performance, cost-effective PDC bit solutions and professional on-site technical support. For more product details and customized solutions, please visit our official website: https://www.hnsdrillbit.com
📞 Contact Us
- Company: Shaanxi Hainaisen Petroleum Technology Co., Ltd
- Website: https://www.hnsdrillbit.com
- Core Products: PDC cutters, PDC drill bits
