Case Study: PDC Bit Performance in Liujiagou Formation, Su 766-5-30 Well

Client: CNPC Changqing Oilfield

Project Location: Ordos Basin, Shaanxi, China

Bit Supplier: Shaanxi Hainaisen Petroleum Technology Co., Ltd. (HNS Drill Bit)

Website: https://www.hnsdrillbit.com/

1. Project Background

The Liujiagou Formation in the Ordos Basin is a notoriously hard, abrasive sandstone formation with high interbedded shale content, which presents significant challenges for drilling operations. Conventional PDC bits often suffer from severe cutter wear, low ROP (rate of penetration), and short footage, leading to frequent bit trips, extended drilling time, and increased operational costs.

For the Su 766-5-30 well, the client required a PDC bit solution that could deliver:

High ROP in the 8-1/2" intermediate section

Maximum footage in a single run to reduce trip costs

Stable mechanical performance in abrasive sandstone

Reliable field data to support long-term cooperation

2. Bit Solution & Technical Parameters

Hainaisen's engineering team designed a custom 8-1/2" SD96333 PDC bit specifically optimized for the Liujiagou Formation. The bit features:

Premium polycrystalline diamond cutters with enhanced impact and abrasion resistance

Optimized blade profile and hydraulic structure for efficient cuttings removal

Balanced weight-on-bit distribution to reduce vibration and extend bit life

Specialized cutter orientation for hard, abrasive sandstone formations

Field Operation Data

3. Field Performance & Results

The SD96333 PDC bit delivered exceptional performance in the Su 766-5-30 well, far exceeding the client's expectations:

Unmatched Single-Run Footage: The bit drilled 2098 meters in a single run through the entire Liujiagou Formation, eliminating the need for a mid-run bit change and saving 2+ days of rig time.

Industry-Leading ROP: With an average ROP of 40.34 m/h, the bit achieved a 35%+ improvement over conventional bits used in offset wells in the same block.

Minimal Wear & Tear: Post-run inspection showed only minor cutter wear, with the bit remaining in good condition for potential reuse in similar formations.

Cost Reduction: The single-run operation reduced the client's bit cost per meter by 42% and cut overall drilling costs for the section by over 30%.

4. Client Feedback

"We've been struggling with the Liujiagou Formation for years—conventional bits just can't handle the abrasion, and we're always stuck with low ROP and multiple trips. Hainaisen's SD96333 bit was a game-changer for us.

On the Su 766-5-30 well, the bit drilled 2098 meters straight through the formation in one run, with an average ROP of over 40 m/h. That's the best performance we've ever seen in this block. The bit held up perfectly, no vibration issues, no premature wear.

We've already ordered more SD96333 bits for our upcoming wells in the Ordos Basin. Hainaisen's technical team worked with us to customize the bit for our specific formation, and the results speak for themselves. They're not just a supplier—they're a real partner for our drilling operations."

— Drilling Supervisor, Changqing Oilfield 40695 Well Team

5. About Shaanxi Hainaisen Petroleum Technology Co., Ltd.

Shaanxi Hainaisen Petroleum Technology Co., Ltd. (HNS Drill Bit) is a leading manufacturer of high-performance PDC bits, roller cone bits, and downhole tools for the oil and gas, mining, and geothermal drilling industries. With over 10 years of experience in the Ordos Basin and global markets, we specialize in custom bit design for complex formations, delivering reliable, cost-effective solutions that maximize drilling efficiency.

Our core capabilities include:

Custom PDC bit design and manufacturing for all formation types

On-site technical support and drilling optimization

Post-run bit analysis and performance improvement

Global supply chain and after-sales service

For more information about our products and solutions, visit our website at https://www.hnsdrillbit.com/ or contact our sales team for a custom bit solution for your next project.