Case Study: 8-1/2" SD6545 PDC Bit Delivers Exceptional Performance in Shiqianfeng Formation, Su 76-5-30 Well
Customer: CNPC Changqing Oilfield
Operator: Shaanxi Hainaisen Petroleum Technology Co., Ltd.
Website: https://www.hnsdrillbit.com/
1. Project Background
The Su 76-5-30 well, located in the Sulige Gas Field of the Ordos Basin, is a key development well targeting the Shiqianfeng Formation. This formation is characterized by hard, abrasive sandstone with high interlayer heterogeneity, which historically posed severe challenges to drill bit performance:
- Low ROP (rate of penetration) leading to extended drilling time
- Severe bit wear requiring frequent tripping operations
- High overall drilling costs and operational risks
The client, a major national oilfield operator, required a PDC bit solution that could deliver stable, high-efficiency drilling in this complex formation, reduce non-productive time, and lower overall well construction costs.
2. Bit Selection & Technical Solution
After a detailed analysis of the formation lithology, well trajectory, and drilling parameters, our engineering team selected the 8-1/2" SD6545 matrix-body PDC bit for this operation. The bit was customized with the following key design features tailored to the Shiqianfeng Formation:
- Cutting Structure: 5-blade, 45° back-rake angle design with premium 1313 PDC cutters, optimized for high-impact resistance and wear resistance in hard, abrasive formations
- Hydraulic System: Deep, smooth hydraulic channels and large-volume nozzles to enhance cuttings removal and reduce bit balling
- Body Material: High-strength matrix body with enhanced impact toughness to withstand the harsh downhole environment
- Gauge Protection: Extended gauge pads with hardfacing to ensure long-term gauge retention and wellbore quality
3. Field Operation Results
3.1 Drilling Performance Data
| Parameter | Value |
|---|---|
| Bit Specification | 8-1/2" SD6545 |
| Bit Serial No. | 688336 |
| Drilling Interval | 2790m – 3102m |
| Well Team | 40695 |
| Well No. | Su 76-5-30 |
| Formation | Shiqianfeng |
| Total Footage Drilled | 312m |
| Net Drilling Time | 30h |
| Average Mechanical ROP | 10.4 m/h |
3.2 Performance Highlights
- Significant ROP Improvement: The average ROP of 10.4 m/h was 35% higher than the offset well average for the same formation, drastically reducing drilling time
- Stable & Reliable Operation: The bit completed the entire 312m interval in a single run with no tripping for bit replacement, eliminating 1-2 round trips and saving over 24 hours of non-productive time
- Excellent Bit Condition: After pulling out of the hole, the bit showed minimal wear on cutters and gauge, with 80% of the cutting structure remaining intact, demonstrating outstanding durability
- Cost Reduction: The single-run high-efficiency drilling reduced the client's overall drilling cost by over 20% for this interval
4. Customer Feedback
"We've been struggling with the Shiqianfeng Formation in the Sulige Gas Field for years. The SD6545 bit from Hainaisen completely exceeded our expectations. The 10.4 m/h average ROP is a new record for our team in this formation, and the fact that it finished the entire interval in one run saved us a ton of time and money. The bit's wear resistance and stability are top-tier, and we've already ordered more SD6545 bits for our upcoming wells in the block. Hainaisen's technical team also provided on-site support throughout the operation, which was a huge help. This is a reliable partner we can count on."—— Drilling Supervisor, Changqing Oilfield 40695 Well Team
5. Conclusion
The successful application of the 8-1/2" SD6545 PDC bit in the Su 76-5-30 well fully validates the superior performance of Hainaisen's PDC bit products in hard, abrasive formations. By combining customized design, premium materials, and professional on-site technical support, we delivered a solution that solved the client's long-standing drilling pain points, achieved significant cost and time savings, and established a new benchmark for efficient drilling in the Shiqianfeng Formation of the Sulige Gas Field.
Shaanxi Hainaisen Petroleum Technology Co., Ltd. remains committed to providing high-performance drilling tools and comprehensive technical solutions for global oil and gas operators. For more information about our products and services, please visit our official website: https://www.hnsdrillbit.com/
📞 Contact Us
Shaanxi Hainaisen Petroleum Technology Co., Ltd.
- Website: https://www.hnsdrillbit.com/
- Email:hainaisen@hnsdrillbit.com
- Address: Xi'an High-tech Zone, Shaanxi, China
