Case Study: 6-1/2" SD6522 PDC Bit Delivers Exceptional Drilling Performance in Sulige Gas Field
Project Background
The Sulige Gas Field in the Ordos Basin is one of China's core tight gas production blocks. The Liujia Gou Formation, a key drilling interval in this area, is notorious for its complex lithology, high abrasiveness, and interbedded hard formations. These geological features have long created major pain points for drilling operations: low penetration rates, short bit service life, and frequent tripping that drives up non-productive time and overall well construction costs.
Our client, partnering with the No.40607 Drilling Team, needed a fit-for-purpose high-performance PDC bit. The goal was to find a tool that could withstand the harsh downhole conditions of the Liujia Gou Formation, deliver consistent footage, and boost drilling efficiency to shorten the well completion cycle.
Bit & Well Basic Information
| Parameter | Field Details |
|---|---|
| Bit Model & Size | 6-1/2" SD6522 PDC Bit |
| Bit Serial Number | A2789 |
| Drilling Crew | No.40607 Drilling Team |
| Well Number | Su 25-16-35SX |
| Target Formation | Liujia Gou Formation |
Actual Drilling Performance Data
Our 6-1/2" SD6522 PDC bit was deployed to drill the interval from 697m to 2830m in Well Su 25-16-35SX, with the following verified operational results:
| Performance Indicator | Actual Result |
|---|---|
| Drilled Interval | 697m – 2830m |
| Total Footage Drilled | 2133 Meters |
| Net Drilling Time | 70 Hours |
| Average Rate of Penetration (ROP) | 30.5 Meters/Hour |
Key Performance Highlights
Exceptional Durability for Single-Run Full Interval Drilling
The bit completed 2133 meters of continuous drilling in a single run, fully penetrating the challenging Liujia Gou Formation with no need for mid-section bit replacement. This eliminated multiple unplanned tripping operations, drastically cutting non-productive time for the drilling team.
Industry-Leading Drilling Efficiency
With an average ROP of 30.5 meters per hour, our SD6522 bit significantly outperformed the average penetration rate of offset wells in the same formation. Its optimized cutting structure maintained stable, high-efficiency drilling even in highly abrasive interbedded layers, enabling the client to finish the interval well ahead of the planned schedule.
Superior Adaptability to Complex Formation Conditions
Engineered specifically for hard, abrasive formations, the SD6522 model features a premium wear-resistant cutter layout, optimized hydraulics for effective bit face cleaning, and anti-balling design. This engineering ensured consistent, smooth performance across the entire 2133-meter interval, with no sudden ROP drop or tool failure.
Project Conclusion
This field application fully validates the outstanding performance of our 6-1/2" SD6522 PDC bit in the complex, high-abrasion Liujia Gou Formation. By delivering industry-leading footage, penetration rate, and downhole reliability, we helped our client reduce drilling costs, shorten well construction time, and hit their project targets efficiently.
At HNS Drill Bit, we specialize in designing and manufacturing custom high-performance PDC drill bits tailored to solve our clients' unique formation and drilling challenges. Contact us today to find the optimal drilling solution for your next project.
