Case Study: 6-1/2" SD6541 PDC Bit High-Efficiency Drilling Application in Liujiagou Formation

Project Overview

The Liujiagou Formation is widely recognized as a highly challenging drilling interval in the Ordos Basin oil and gas development block. Characterized by ultra-high rock hardness, strong abrasiveness, and extremely poor drillability, conventional PDC bits operating in this formation commonly face industry pain points including low rate of penetration (ROP), short single-trip footage, rapid abrasive failure, frequent tripping operations, and extended drilling cycles, which significantly increase the comprehensive operation cost for drilling crews.

To address the above technical difficulties, Shaanxi Hainaisen Petroleum Technology Co., Ltd. developed the customized 6-1/2" SD6541 PDC bit based on the detailed lithological characteristics of the Liujiagou Formation. This bit was applied in Well Su 25-16-39X, achieving breakthrough drilling performance and fully verifying the product's superior adaptability to hard and abrasive formations.

Core Drilling & Performance Parameters

On-site Performance Highlights

Industry-leading Single-trip Footage: The 6-1/2" SD6541 bit completed 2150m of total footage in a single trip in the hard Liujiagou Formation, far exceeding the average footage of conventional bits in the same block. It eliminated multiple tripping operations and greatly reduced non-production time.

Ultra-high Efficient Drilling ROP: Achieved an average mechanical ROP of 43m/h, which significantly shortened the drilling cycle of the target interval, helped the drilling crew complete the operation ahead of schedule, and effectively reduced comprehensive drilling costs.

Excellent Wear Resistance & Stability: After 50 hours of continuous net drilling operation, the bit maintained excellent cutting performance and structural integrity throughout the whole process. No abnormal failure such as cutting tooth chipping or matrix damage occurred, fully demonstrating its outstanding reliability in harsh drilling conditions.

Core Advantages of SD6541 Series PDC Bit

Customized Formation-specific Design: The bit structure, cutter layout and hydraulic system are all customized for the lithological characteristics of the Liujiagou Formation, perfectly matching the rock-breaking mechanism of hard and abrasive formations to maximize drilling efficiency.

High-performance Diamond Cutter: Adopted premium grade wear-resistant and impact-resistant PDC cutters, which have excellent anti-abrasion performance in hard formations and strong anti-chipping ability under alternating impact loads, ensuring long-term stable cutting performance.

Optimized Hydraulic Structure Design: The optimized hydraulic flow field design effectively improves bottom-hole cleaning ability, reduces chip hold down effect, avoids repeated cutting of rock cuttings, and further improves ROP while extending the service life of the bit.

High-strength Bit Body Structure: The reinforced matrix structure design ensures the bit has excellent impact resistance and torsional fatigue resistance, can adapt to complex downhole vibration environments, and guarantees the safety and stability of long-distance drilling operations.

About Us

Shaanxi Hainaisen Petroleum Technology Co., Ltd. is a professional manufacturer and service provider of high-performance PDC drill bits, committed to providing customized, efficient and reliable drilling solutions for the global oil and gas, mining, and geothermal drilling industries. With advanced R&D technology, a strict quality control system and rich on-site application experience, we continue to create value for customers by improving drilling efficiency and reducing operation costs.

For more information about our products and solutions, please visit our official website: https://www.hnsdrillbit.com/