Field Case Study: 8-1/2" SD9633 PDC Bit Delivers Exceptional Performance in Liujiaogou Block
Customer: CNPC Changqing Oilfield
Location: Liujiaogou Block, Ordos Basin, China
Bit Model: 8-1/2" SD9633 Steel Body PDC Bit
Operator: Well Team 50503
Well No.: Su 75-46-20X
Date of Operation: Q2 2025
Company: Shaanxi Hainaisen Petroleum Technology Co., Ltd (Hainaisen)
Project Background
The Liujiaogou Block in the Ordos Basin is a mature development area for Changqing Oilfield, characterized by hard, abrasive sandstone and interbedded shale formations in the 1029–2880m interval. Historically, operators faced significant challenges in this section:
Low ROP (rate of penetration) due to formation abrasiveness
Frequent bit trips leading to high non-productive time (NPT)
High bit wear and short service life, increasing operational costs
Changqing Oilfield sought a reliable PDC bit solution to improve drilling efficiency, reduce trip frequency, and lower overall well costs in the block. Hainaisen, a leading manufacturer of high-performance PDC drill bits, was selected to provide a custom-engineered solution for this application.
Bit Design & Technical Advantages
The 8-1/2" SD9633 steel body PDC bit was specifically engineered for the Liujiaogou Block’s hard, abrasive formations, with key design features tailored to the application:
| Parameter | Specification |
|---|---|
| Bit Size | 8-1/2" (215.9mm) |
| Blade Count | 5 Blades |
| Cutter Size | 16mm Premium PDC Cutters |
| Body Material | High-Strength Alloy Steel |
| Hydraulic Design | Optimized Nozzle Layout for Enhanced Cutting Cleaning |
| Profile | Aggressive Profile for High ROP in Hard Formations |
Key Design Innovations:
Premium PDC Cutters: High-wear-resistant cutters with enhanced impact toughness, engineered to withstand the abrasive sandstone and reduce cutter chipping/breakage.
Optimized Hydraulics: Custom nozzle placement ensures efficient cuttings evacuation, preventing balling and maintaining consistent ROP.
Robust Steel Body: High-strength alloy steel body provides excellent structural integrity, reducing bit deflection and improving stability in interbedded formations.
Field Performance Results
The 8-1/2" SD9633 PDC bit was run in Well Su 75-46-20X by Well Team 50503, drilling the 1029–2880m interval in the Liujiaogou Block. The performance results exceeded customer expectations:
| Performance Metric | Result |
|---|---|
| Total Drilling Interval | 1029m – 2880m |
| Total Footage Drilled | 1851m |
| Total Drilling Time | 70 hours |
| Average ROP | 26.44 m/h |
| Bit Condition After Pull | Minimal Wear, Ready for Reuse in Similar Formations |
Performance Breakdown vs. Offset Wells:
Footage: 35% higher than offset wells using competitor bits in the same interval
ROP: 42% faster than the block average for the 1029–2880m section
Trips: Eliminated 1 planned bit trip, reducing NPT by over 12 hours
Cost per Foot: Reduced by 28% compared to offset wells
Customer Feedback
Following the successful run, the drilling supervisor from Well Team 50503 provided the following on-site feedback:
"We’ve struggled with slow ROP and frequent bit changes in the Liujiaogou Block for years. The Hainaisen SD9633 bit completely changed the game. We drilled 1851 meters in just 70 hours, with an average ROP of 26.44 m/h—far better than any bit we’ve used in this area. The bit came out in excellent condition, with minimal cutter wear, and we’re already planning to run this model in our next 3 wells in the block. Hainaisen’s technical support team was on-site to assist with bit selection and drilling parameters, which made the entire process seamless. This is the best PDC bit we’ve used for this formation, hands down."
Additional feedback from Changqing Oilfield’s engineering department:
"The SD9633 bit delivered consistent, reliable performance across the entire interval. The reduction in NPT and cost per foot has a direct, positive impact on our block development economics. We look forward to expanding our partnership with Hainaisen for more challenging formations in the Ordos Basin."
Conclusion
The 8-1/2" SD9633 PDC bit from Hainaisen demonstrated exceptional performance in the Liujiaogou Block, delivering significant improvements in ROP, footage, and cost efficiency for Changqing Oilfield. The bit’s custom-engineered design, combined with Hainaisen’s on-site technical support, solved long-standing drilling challenges in the block, reducing operational costs and improving project timelines.
Hainaisen remains committed to developing high-performance, application-specific PDC drill bits that deliver measurable value to our customers. For more information on our SD series PDC bits or to discuss a custom solution for your drilling project, contact our technical team today.
About Shaanxi Hainaisen Petroleum Technology Co., Ltd
Hainaisen is a leading manufacturer of premium PDC drill bits, diamond compact cutters, and downhole drilling tools, serving the global oil and gas industry. With a focus on innovation, quality, and customer success, we deliver custom-engineered solutions for the most challenging drilling environments worldwide.
Website: https://www.hnsdrillbit.com
Contact: For technical inquiries and sales, reach out to our international team at [hainaisen@hnsdrillbit.com]
