Buyer's Case Study: Reducing Drilling Costs With TCI Tricone Bits

When the operations team at MountainView Mining Co. sat down to review their Q1 2024 financial reports, there was one line item that stood out like a sore thumb: drilling costs. The mid-sized iron ore mining company, based in the rugged terrain of the Pacific Northwest, had seen their quarterly spending on rock drilling tools jump by 35% compared to the previous year. What's worse, their drill rigs were spending more time idle than drilling—thanks to frequent bit failures, slow penetration rates, and a maintenance backlog that left crews scrambling to keep up. "We were bleeding money," recalls Jamie Carter, MountainView's Operations Director. "Every time we thought we'd fixed one issue, another popped up. It felt like we were stuck in a cycle of replacing bits, repairing drill rods, and watching our profit margins shrink."

What MountainView didn't know at the time was that their struggles were about to lead them to a game-changing solution: upgrading to high-performance TCI tricone bits. Over the next six months, this shift wouldn't just stabilize their costs—it would cut their drilling expenses by nearly a third, transform their operational efficiency, and set a new standard for how they approached rock drilling. This is the story of how a strategic focus on the right rock drilling tool turned their fortunes around.

The Problem: A Perfect Storm of Drilling Inefficiency

To understand why MountainView's costs were spiraling, it helps to first understand their operation. Founded in 2009, the company operates two iron ore mines in Washington State, extracting roughly 1.2 million tons of ore annually. Drilling is the backbone of their workflow: from exploratory drilling to map ore deposits, to blast hole drilling to loosen rock for extraction, to infrastructure drilling for tunnels and access roads. For years, they'd relied on a hodgepodge of rock drilling tools: older-style tricone bits, a few budget-friendly PDC bits, and even some second-hand equipment to keep costs low. But by early 2024, this approach was unraveling.

The root of the problem? Their drilling sites are dominated by hard, abrasive rock formations—primarily quartzite and granite, with occasional bands of schist. These are notoriously tough on drilling tools, and MountainView's current setup wasn't equipped to handle them. "Our bits were failing left and right," says Mike Torres, Lead Drill Operator with 15 years of experience. "We'd start a blast hole, and within 100 meters, the bit would be dull or chipped. On bad days, we'd go through three bits in a single shift. And each time we changed a bit, we'd lose an hour of drilling time—plus the cost of the new bit itself."

Adding to the frustration was the inconsistency of their tools. MountainView had tried switching to cheaper, off-brand bits to save money, but those lasted even less time. They'd also experimented with matrix body PDC bits, which are known for speed in soft-to-medium rock, but those chipped and cracked in the hard quartzite. "PDCs are great in the right conditions," Torres explains, "but our rock is like drilling through concrete. The PDC cutters would wear down or snap off after just a few holes. We were throwing good money after bad."

The numbers told the full story: In Q1 2024, MountainView spent $255,000 on rock drilling tools alone—including bits, drill rods, and dth drilling tool accessories. Their drill rigs averaged just 120 meters of drilling per bit, with penetration rates hovering around 12 meters per hour. Downtime due to bit changes and maintenance hit 45 hours per month, and their cost per meter drilled had climbed to $28. "We needed a solution that wasn't just a Band-Aid," Carter says. "We needed something that could handle our rock, last longer, and actually make us more efficient. That's when we started asking: What are we missing here?"

The Turning Point: Discovering TCI Tricone Bits

Carter and her team began by auditing their entire drilling process, from the rock formations they were targeting to the specs of their equipment. They brought in a third-party geologist to analyze core samples, confirming that their primary challenge was the hardness and abrasiveness of the rock (rated 7-8 on the Mohs scale, for context). They also reviewed their drill rig data, noting that their current bits were operating at suboptimal RPMs and weight-on-bit (WOB) settings—likely due to operator uncertainty about how to handle frequent bit failures.

It was during a trade show in Denver, in March 2024, that Carter first heard about TCI tricone bits. A representative from RockSolid Tools Inc., a mid-sized supplier specializing in industrial drilling equipment, was showcasing their latest TCI (Tungsten Carbide ｉｎｓｅｒｔ) tricone bit model, the TS-500. "I was skeptical at first," Carter admits. "We'd seen tricone bits before—they've been around for decades. But the RockSolid team explained that modern TCI tricone bits are a far cry from the ones we used 10 years ago. The carbide inserts are harder, the bearing systems are more durable, and the design is optimized for specific rock types. They didn't just sell me a bit—they asked questions about our rock, our rigs, and our pain points. That's when I realized this might be different."

So, what exactly makes a TCI tricone bit different? Unlike PDC bits, which use fixed polycrystalline diamond cutters, tricone bits feature three rotating cones (hence "tricone") embedded with tungsten carbide inserts. As the bit rotates, the cones spin independently, crushing and scraping the rock rather than shearing it—a design that's particularly effective in hard, abrasive formations. The TCI inserts, made from a blend of tungsten carbide and cobalt, are designed to withstand extreme heat and friction, while advanced seal technologies prevent mud and debris from damaging the internal bearings. "Think of it like comparing a sledgehammer to a scalpel," explains Dr. Raj Patel, RockSolid's Lead Product Engineer. "PDCs are great for soft-to-medium rock where you want speed, but TCI tricone bits are workhorses for hard, gritty formations. They absorb impact better, distribute wear more evenly, and just keep going when other bits would fail."

Intrigued, Carter invited RockSolid's technical team to visit MountainView's main mining site for a deeper dive. Over two days, the team analyzed rock samples, reviewed drilling logs, and inspected MountainView's drill rigs (three Atlas Copco FlexiROC D60s, each paired with 3.5-inch drill rods). They also observed a day of drilling operations, noting how Torres and his crew struggled with bit vibration, slow progress, and the time-consuming process of changing bits. "The RockSolid team didn't just tell us what we wanted to hear," Torres says. "They pointed out that our current bits were underdesigned for our rock—too few inserts, weak bearings, and a cone profile that wasn't matching our formation. They recommended their TS-500 model, specifically engineered for hard, abrasive rock like ours."

The TS-500, an 8 ½-inch TCI tricone bit, featured a 12% increase in carbide ｉｎｓｅｒｔ density compared to standard models, a reinforced steel body, and a proprietary "mud-lubricated" bearing system designed to extend life in high-friction environments. RockSolid also suggested adjusting MountainView's drilling parameters: increasing WOB from 18 kN to 22 kN and lowering RPMs from 120 to 90 to reduce heat buildup. "It was a lot to take in," Carter says. "We'd been told for years that faster RPMs meant faster drilling, but the data showed the opposite for our rock. The TS-500 was designed to thrive under higher weight and lower speed—so we decided to trust the process."

The Test: A Six-Week Pilot Project

MountainView's leadership team was cautiously optimistic—but they weren't ready to overhaul their entire operation overnight. Instead, they proposed a pilot project: equip one drill rig with the TS-500 TCI tricone bits and run it alongside their existing setup for six weeks. The goal was simple: compare performance metrics, track costs, and see if the new bits could deliver on RockSolid's promises. "We told the crew: Treat this like a science experiment," Carter recalls. "Log every meter drilled, every minute of downtime, every bit change. We need to know if this works."

Torres was assigned to lead the pilot, and he admits he was nervous. "I'd been burned by 'miracle bits' before," he says. "But from the first time we lowered the TS-500 into the hole, I could tell it was different. The vibration was noticeably less—our old bits would shake so hard you could feel it in the rig cab. This one? It hummed. Smooth as butter." Over the first week, the TS-500 drilled 320 meters before needing a change—more than double the life of their previous bits. Penetration rates climbed to 15 meters per hour, and the crew reported spending less time adjusting the rig's settings. "We hit a section of granite that had eaten through three of our old bits in a day," Torres says. "The TS-500 chewed through it like it was nothing. After that, the crew was sold."

By the end of the six-week pilot, the results were undeniable: The TS-500 had averaged 310 meters per bit, with penetration rates of 14.5 meters per hour. Downtime for that rig dropped to 18 hours, and the cost per meter drilled fell to $19. "We were floored," Carter says. "The numbers spoke for themselves. We immediately ordered enough TS-500 bits to equip all three rigs and scheduled training sessions for our operators to learn the new parameters."

The Rollout: Scaling Up and Overcoming Challenges

Scaling the TS-500 across MountainView's fleet wasn't without its hurdles. For one, the new bits cost 20% more upfront than their previous models—$850 per bit vs. $700. "That gave some of our finance team pause," Carter admits. "But when we showed them the projected savings from longer life and faster drilling, they came around. It was a classic 'pay more now, save more later' scenario."

Another challenge was operator training. While the TS-500 was designed to be user-friendly, the recommended WOB and RPM settings were different from what the crew was used to. RockSolid sent a technical trainer to MountainView's site for three days, leading hands-on sessions on how to adjust the rigs, read bit performance, and identify early signs of wear. "The key was teaching the crew to trust the bit," Torres says. "They were used to babying our old bits—light weight, high RPMs to avoid breaking them. With the TS-500, we needed to lean into the weight and slow down the RPMs. Once they saw the results, it clicked."

Maintenance teams also needed to adapt. The TS-500's bearing system required different care than their old bits—specifically, flushing with clean mud after use to prevent debris buildup. MountainView added a "bit maintenance checklist" to their daily routines, and within a month, the process became second nature. "We also noticed that our drill rods were lasting longer," Torres says. "The reduced vibration from the TS-500 meant less stress on the rods—so we were replacing fewer of those, too. It was a ripple effect."

The Results: Six Months Later

By September 2024, six months after the initial pilot, MountainView's transformation was complete. The team gathered to review the data, and the numbers were staggering. To visualize the impact, here's a breakdown of their key metrics before and after implementing the TS-500 TCI tricone bits:

"The savings were even better than we projected," Carter says. "By Q3, we'd cut our monthly rock drilling tool spending by $24,000—a 28% reduction. Our cost per meter drilled dropped by nearly a third, and we were able to increase our monthly drilling output by 15% without adding any new rigs. That meant we could access more ore deposits, hit our production targets, and even take on a small contract drilling project for a neighboring mine—something we never would have considered before."

Perhaps the most unexpected benefit? Improved safety. With less downtime, crews spent fewer hours working at height (changing bits) and less time in the field during inclement weather. "Safety is always our top priority," Carter says. "The fact that the TS-500 made our sites safer was the cherry on top."

Lessons Learned: What MountainView Discovered About Drilling Efficiency

Looking back, Carter and her team say the shift to TCI tricone bits taught them valuable lessons about how to approach rock drilling. Here are the key takeaways they now share with other mining operations facing similar challenges:

1. Match the Bit to the Rock (Not the Other Way Around)

"We spent years trying to force generic bits to work in our rock," Carter says. "The TS-500 showed us that the right tool for the job isn't a luxury—it's a necessity. Invest in understanding your formation, then find a bit designed for it."

2. Upfront Cost vs. Total Cost of Ownership

"Yes, the TS-500 cost more upfront," Torres adds. "But when you factor in longer life, faster drilling, and less downtime, it's a no-brainer. Total cost of ownership is what matters—not the sticker price."

3. Supplier Partnerships Matter

"RockSolid didn't just sell us bits—they became a partner," Carter says. "Their technical support, training, and willingness to tweak the TS-500 to our needs made all the difference. Don't work with suppliers who don't take the time to understand your operation."

4. Train Your Crew (and Listen to Them)

"Our operators are the ones in the cab, feeling the bit, seeing how it performs," Torres says. "Involve them in the decision-making process, train them thoroughly, and trust their feedback. They'll make or break your success."

The Future: Building on Success

Today, MountainView Mining Co. is in a very different place than it was a year ago. Their drilling costs are stable, their crews are more efficient, and they've even expanded their use of TCI tricone bits to their exploratory drilling program, where they're using smaller-diameter models to map new ore deposits. "We're now looking at other areas where we can optimize," Carter says. "RockSolid has a line of drill rods designed to pair with the TS-500, so we're testing those next. The goal is to create a fully integrated system—bits, rods, rigs, and training—that works together seamlessly."

For other mining or drilling operations struggling with high costs and inefficiency, Carter has a simple message: "Don't accept the status quo. The right rock drilling tool exists—you just need to find it. For us, that tool was the TCI tricone bit. For you, it might be something else. But whatever it is, invest the time to research, test, and trust the process. The savings—and the peace of mind—are worth it."

As for Torres and his crew? They're still raving about the TS-500. "I've been drilling for 15 years, and this is the best bit I've ever used," he says with a grin. "It's not just a tool—it's a game-changer. And in this business, that's worth its weight in gold."