Case Study: 91mm Core Drill Bits Supplied for Urban Foundation Investigation Project in Syria – December 2025
In December 2025, we successfully supplied 300 pieces of 91mm core drill bits for a key urban infrastructure foundation investigation project in Syria.
What made this project stand out was not just the drilling performance in fine‑grained granite, but also the detailed technical discussions and practical negotiation process behind the order. Ultimately, this case shows how professional communication, transparency, and a strong understanding of engineering challenges help build long‑term trust.
Project Background
- Project Date: December 2025
- Location: Syria (Municipal Urban Construction Zone)
- Application: Foundation Geological Investigation
- Formation: Fine‑grained Granite
- Drill Bit Model: 91mm Core Drill Bit
- Total Quantity: 300 PCS
- Average Drilling Speed: 4–5 meters/hour
The client was a local engineering contractor responsible for foundation survey work before large‑scale urban development.
First Contact: A Cautious Buyer
When the client first reached out, the conversation was direct and technical. Their first question wasn’t about price—it was about granite.
They explained that previous suppliers had promised good performance in “hard rock,” but in fine‑grained granite, the bits wore out too quickly. Drilling speed often dropped below 3 m/h after only a short time, and frequent bit replacements were delaying their project.
Their main concern was clear: “We cannot afford unstable performance. Speed fluctuation affects everything.”
For infrastructure projects, drilling delays can lead to machine downtime, higher labor costs, and even contract penalties. Therefore, they were not looking for the cheapest bit—they wanted predictable performance.
Technical Discussion Before Price Negotiation
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Before we discussed pricing, our engineering team asked for:
After reviewing the formation conditions, we explained why many bits struggle in fine‑grained granite:
As a solution, we proposed:
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The 91mm core drill bit used in the Syria project |
At this stage, the client told us something important: “Other suppliers talk about hardness. You talk about wear and balance.” That comment marked a turning point in our discussion.
The Pricing Conversation: Cost vs. Downtime
When the topic of pricing came up, the client compared three different suppliers. Our unit price was not the lowest.
However, they openly stated: “If your bit lasts 20% longer, we save more than the price difference.”
This is a common concern for overseas engineering contractors: they focus on cost per drilled meter, not just the unit price.
To address this, we provided:
- An estimated lifespan comparison
- Suggested rotation speed parameters
- Field usage recommendations
- A replacement cycle calculation
Instead of focusing on price, we emphasized cost efficiency over total drilling depth. This approach built confidence.
Order Confirmation and Production Transparency
After two weeks of technical discussion and internal evaluation, the client confirmed an order of 300 pieces.
Their key requirements were:
- Strict batch-to-batch consistency
- On‑time production and delivery
- Pre‑shipment inspection photos
- Clear export documentation
To meet these, we provided production progress updates at key stages:
- Raw material preparation
- Matrix pressing
- Machining completion
- Final inspection
This level of transparency helped reduce their procurement risk. For overseas buyers, supplier reliability is often more important than marketing claims.
On‑Site Performance in Fine‑Grained Granite
Once deployed in Syria, the bits were used in foundation boreholes through the granite formation.
Reported results:
- Stable drilling speed: 4–5 meters/hour
- Reduced vibration
- Smooth cuttings discharge
- Consistent core quality
- Lower replacement frequency compared to the previous supplier
The client specifically noted: “Speed remained stable throughout the drilling process. That is what we needed.”
In granite formations, consistency is far more valuable than occasional peak performance.
Real Concerns of International Clients
- Predictability Over Promises – They prefer realistic performance data rather than exaggerated claims.
- Total Project Cost – Downtime, machine idle hours, and labor cost matter more than unit price.
- Communication Efficiency – Time zone differences require responsive and clear communication.
- Batch Stability – When ordering 300 pieces, consistency is critical.
Long‑Term Cooperation Potential
After the successful field performance, the client initiated discussions about future infrastructure and geological investigation projects.
Their feedback summarized our cooperation:
- Professional technical support
- Transparent communication
- Stable granite performance
- Reliable delivery
Consequently, this project strengthened mutual trust and opened the door for future collaboration.
Why This Case Demonstrates Real Capability
- A deep technical understanding of granite drilling challenges
- Real negotiation based on engineering logic, not just sales talk
- A cost‑per‑meter calculation approach that aligns with client goals
- Strict production control and quality stability
- A long‑term cooperation mindset
In foundation investigation projects, performance consistency directly determines schedule reliability. And schedule reliability is what makes a project successful.
Conclusion
The December 2025 Syria urban foundation project was more than just a 300‑piece order. It was a partnership built on:
- Technical discussion before pricing
- Risk reduction for the buyer
- Transparent production updates
- Verified granite performance
With a stable drilling speed of 4–5 meters per hour in fine‑grained granite using 91mm core drill bits, this project demonstrates our commitment to engineering reliability over marketing claims.
Facing similar granite formations in your infrastructure, mining, geothermal, or geological investigation projects?
Contact our engineering team for customized drilling solutions backed by real case experience.
Keywords: core drill bits, granite drilling, foundation investigation, Syria drilling project, 91mm core bit, fine-grained granite, drilling performance case study, cost per meter drilling, geological investigation tools, Chenghui drilling tools.