Case Study: 6-1/2" SD6533 PDC Bit Delivers Reliable Performance in Heshanggou Formation, Su 25-3-9X Well
Company: Shaanxi Hainaisen Petroleum Technology Co., Ltd
Website: https://www.hnsdrillbit.com/
Project Background
In the Su 25-3-9X well operated by the 40695 drilling crew of the 2005 drilling team, the Heshanggou Formation presented a persistent challenge for the operator. This interval, spanning from 2005m to 2645m, is characterized by complex lithology, high abrasiveness, and frequent well leakage risks, which historically led to low drilling efficiency, frequent bit trips, and extended well construction cycles.
To break through this bottleneck, the operator selected Shaanxi Hainaisen Petroleum Technology Co., Ltd. (HNS Drill Bit) and our 6-1/2" SD6533 series PDC bit (bit number: 2847) to tackle this tough formation.
Bit Performance Highlights
| Parameter | Actual On-Site Result |
|---|---|
| Bit Specification | 6-1/2" SD6533 PDC Bit |
| Bit Number | 2847 |
| Drilling Interval | 2005m – 2645m |
| Total Footage Drilled | 640m |
| Net Drilling Time | 37 hours |
| Average Mechanical ROP | 17.30 m/h |
| Reason for Pulling Out | Well leakage (bit performance remained stable) |
Key Performance Breakdown
- Stable Penetration in Tough Formation: The SD6533 bit achieved a steady average ROP of 17.30 m/h in the highly abrasive Heshanggou Formation, outperforming conventional bits in the same block by over 25%. This consistent performance eliminated the need for mid-run bit changes, directly reducing tripping time and operational costs.
- Full Interval Single Run Completion: The bit successfully drilled the entire 640m target interval in a single run, from 2005m to 2645m, without any performance degradation. This single-run solution minimized downhole exposure time and significantly lowered the risk of borehole instability and other downhole accidents.
- Excellent Durability Under Complex Conditions: Pulled out only due to well leakage (a formation issue unrelated to bit performance), post-run inspection confirmed the PDC cutters remained intact with minimal wear. The bit's robust structure and optimized cutter layout proved its reliability in fractured, leak-prone formations.
- Reduced Drilling Risks: The bit's advanced hydraulic design and balanced cutting structure effectively reduced downhole vibration, ensuring smooth drilling operations even in the complex Heshanggou Formation, which helped the crew maintain control and avoid costly downtime.
Client Testimonial
"The Heshanggou Formation has always been a headache for us—high abrasiveness, frequent well leakage, and bits that wear out too fast. We tried Hainaisen's SD6533 PDC bit on this well, and the results exceeded our expectations.
We drilled 640 meters in 37 hours straight, with a steady ROP of 17.3 m/h, and the bit was still in good shape when we pulled it out for well leakage treatment. No mid-run trips, no unexpected downtime, just solid, reliable performance. This bit saved us a lot of time and money, and we're definitely sticking with Hainaisen for our future wells in this block."
—— Drilling Supervisor, 40695 Drilling Crew, 2005 Drilling Team
Why HNS Drill Bit?
At Shaanxi Hainaisen Petroleum Technology Co., Ltd., we engineer PDC bits specifically for the harsh geological conditions of Chinese onshore oilfields. The SD6533 series is tailored for medium-hard, highly abrasive formations like the Heshanggou Group, featuring:
- High-Impact, Wear-Resistant PDC Cutters: Engineered for long service life and consistent penetration in abrasive lithologies
- Optimized Blade & Hydraulic System: Enhances cuttings removal, reduces bit balling, and minimizes downhole vibration
- Field-Proven Reliability: Tested and validated in hundreds of wells across major Chinese oilfields, delivering consistent performance in complex conditions
- Customized Engineering Support: Our technical team works closely with operators to adjust bit designs for specific well challenges, ensuring maximum efficiency
For more information about our PDC bit solutions, visit our official website: https://www.hnsdrillbit.com/
About Shaanxi Hainaisen Petroleum Technology Co., Ltd
Shaanxi Hainaisen Petroleum Technology Co., Ltd. is a professional manufacturer of oil drilling tools, dedicated to the R&D, production, and sales of high-performance PDC bits, roller cone bits, and downhole drilling tools. With deep industry experience and a focus on technological innovation, we provide cost-effective, reliable drilling solutions for oil and gas operators worldwide.
