Case Study: 6-1/2" PDC Bit Delivers Exceptional Performance in Su 25-3-9X Well, Yanchang Formation

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 operator faced a critical challenge in the Yanchang Formation: the 707m well section was plagued by unstable borehole walls and frequent well leakage risks, which severely restricted drilling efficiency and increased operational costs. Traditional bits often struggled with low ROP and short service life in this formation, leading to multiple tripping operations and extended drilling cycles.

To address this pain point, the operator partnered with Shaanxi Hainaisen Petroleum Technology Co., Ltd. (HNS Drill Bit) to deploy our 6-1/2" SD6533 series PDC bit (bit number: 2845) for the entire 707m interval.

Bit Performance Highlights

Key Performance Breakdown

Unmatched ROP: The SD6533 bit achieved an average mechanical ROP of 51.92 m/h, a 30%+ improvement over conventional bits used in offset wells in the same block. This drastically reduced the time spent drilling the Yanchang Formation, cutting down the overall well construction cycle significantly.

Full Interval Single Run: The bit completed the entire 707m target interval in a single run, with a total footage of 1298m. No bit change was required during the operation, eliminating costly tripping time and reducing the risk of downhole accidents.

Excellent Bit Condition at Pullout: The bit was pulled out only due to well leakage issues unrelated to bit performance. Post-run inspection confirmed that the cutters were intact, with minimal wear, proving the bit's durability and reliability in complex formation conditions.

Stable Drilling Performance: The bit's optimized cutter layout and hydraulic structure effectively reduced vibration, ensuring stable drilling even in the fractured, leak-prone Yanchang Formation, minimizing borehole instability risks.

Client Testimonial

"We've been struggling with low ROP and frequent bit failures in the Yanchang Formation for years. The SD6533 PDC bit from Hainaisen completely changed the game. We finished the 707m section in just 25 hours with an average ROP of over 51m/h, and the bit was still in great shape when we pulled it out for well leakage treatment.

This bit not only saved us a huge amount of drilling time and cost, but also reduced the number of tripping operations, making the whole drilling process much safer and more efficient. We will definitely continue to use Hainaisen's PDC bits in 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 focus on developing high-performance PDC bits tailored to the complex geological conditions of Chinese oilfields. The SD6533 series is designed specifically for medium-hard, fractured formations like the Yanchang Group, featuring:

Premium PDC Cutters: High-wear-resistance cutters for long service life and consistent ROP

Optimized Blade & Hydraulic Design: Reduces vibration, improves cuttings removal, and prevents bit balling

Customized Solutions: We work closely with operators to adjust bit designs for specific well conditions, ensuring maximum drilling 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 bits, dedicated to R&D, production, and sales of high-performance PDC bits, roller cone bits, and other drilling tools. With years of experience in the petroleum drilling industry, we provide reliable, cost-effective drilling solutions for oil and gas operators worldwide.