PDC Coring Bit Powers Xi’an Hard Limestone Exploration
2× higher ROP, 550 m bit life, zero redrilling in fractured hard limestone.
Project Overview: In June 2022, an exploration company in Xi’an faced a highly challenging drilling project involving hard and fractured limestone formations. The 24‑meter depth required reliable drilling tools capable of withstanding abrasive rock while maintaining a high rate of penetration. They chose our PDC coring bits – we delivered 500 bits and the project was completed efficiently.
⚠️Challenge: Hard, fractured limestone formation
The Xi’an project site consisted of hard fractured limestone, a formation notorious for its high abrasiveness and structural instability. Conventional coring bits wore out quickly, drilled slowly, and experienced frequent failures, leading to extended project timelines and increased costs. The customer urgently needed a durable, high‑performance solution to shorten drilling cycles while maintaining core quality.
🔧Solution: Custom‑designed PDC coring bits
Specially selected diamond tables and substrates to resist abrasion from hard limestone.
Increased blade count and back rake to accelerate penetration and reduce vibration.
Enhanced matrix toughness to withstand impacts in fractured zones.
Optimized nozzle placement ensures efficient cuttings removal and cooling.
📈Key Results
🗣️Customer Feedback
“After switching to PDC coring bits, our drilling efficiency improved dramatically. The project timeline was greatly shortened, and the tool durability exceeded our expectations.”
✅Conclusion
This case fully demonstrates the superior performance of our PDC coring bits in hard, fractured limestone formations. Thanks to optimized cutting technology, a robust bit body design, and efficient hydraulics, the customer achieved faster penetration, longer bit life, and lower overall project costs. If your exploration project faces similar challenges, our PDC coring bits are the ideal choice for efficient, durable, and economical drilling.