Varel Drill Bit Identification Chart: A Buyer’s Guide for New, Reconditioned, or Rental

I manage buying for a mid-sized drilling services company—roughly $2M a year in bits, stabilizers, and related tools across 12 vendors. I’m not a drilling engineer, and I don’t pretend to be one. I’m the person who signs the POs and then explains to Finance why the PO was worth it.

Over the last five years, I’ve ordered a lot of Varel drill bits. I’ve bought them new, bought them reconditioned, and rented them when a rig was waiting. So when people ask me “what’s the right Varel bit?” I usually say: it depends.

That’s not a dodge. The right bit for a repeatable vertical hole is different from the right bit for a directional hole in mixed geology. The right bit for a program with a two-week lead time is different from the right bit for a rig that’s making hole right now. There is no universal answer, but there is a universal process: identify the bit you actually need, confirm what you’re being quoted, and make sure the price covers what you think it covers.

What I mean by an identification chart

I keep a Varel bit identification chart in my procurement folder. It’s not a poster. It’s a reference table that maps bit models to IADC codes, connections, and recommended operating parameters. The IADC code is the industry’s standard language for roller-cone bits—formation class, cutting structure, bearing/seal design. If a quote doesn’t include the IADC code, I send it back.

For people who don’t live in this world: a typical IADC code looks like 5-3-7. The first digit identifies formation hardness. The second digit identifies cutting structure type. The third digit identifies bearing/seal design. That’s not a full engineering lesson, but it’s enough to know why two different codes are not interchangeable.

People assume the lowest quote means the vendor is more efficient. What they don’t see is which costs are hidden or deferred.

Scenario 1: The stable repeat

If the last run was good, the formation hasn’t changed, and the well plan is basically the same, buy the same bit from the same source. This sounds obvious. But when a new vendor offers you a price that’s $400 lower, it’s tempting to treat this as a commodity purchase.

When I took over purchasing in 2020, I learned that the hard way. A new vendor quoted $410 less than our regular supplier for a Varel bit. I didn’t check the IADC code because I assumed “equivalent” meant equivalent. The bit arrived with a different cutting structure, we wasted a surface hole run, and Finance rejected part of the claim because the PO didn’t specify the code. The $410 savings turned into a $14,000 lesson. (I still have that email as a reminder.)

In this scenario, the identification chart is your confirmation tool. It helps you verify that the part number, IADC code, and connection size match what you’ve been running. It also gives you a way to say no to a substitution that isn’t actually equivalent.

If you’re buying from an authorized Varel distributor, they should be able to pull the chart and confirm the code. If they can’t or won’t, I’d consider that a warning.

Scenario 2: Mixed inventory or multiple wells

When you’re stocking bits for several rigs or a field with variable geology, you don’t need one bit. You need a small library. That’s where an identification chart becomes more than a reference—it becomes a communication tool.

I use it to tag bins, write POs, and tell warehouse staff which bit goes to which well. “Don’t guess” is not a strategy. If the bit doesn’t have a legible stamp, measure it and confirm the connection before you send it out.

This matters even more when you’re buying used or reconditioned equipment. I’ve walked through yards near Chauvin, Louisiana, where used Varel bits sit in bins sorted only by size. Some look identical until you put a gauge on them. A lot of buyers focus on the model number and completely miss the dull grading report. A reconditioned bit with a proper dull grade report is a known tradeoff. A reconditioned bit without one is a lottery ticket. That’s not an exaggeration.

When you compare reconditioning vendors, ask for a scope of work: which parts were replaced, what seal system was used, and how the bit was graded. If the answer is “it’ll be fine,” I’d rather pay more for a paper trail.

Here’s the part that surprises people: I would rather buy a reconditioned bit with transparent grading than a new bit from a vendor who can’t explain their pricing. The first has an honest tradeoff. The second has hidden variables. Hidden variables are how budget overruns start.

Scenario 3: The rig is waiting

Sometimes “which bit” isn’t the real question. The real question is “how fast can someone get me a bit?” When a rig is making hole, downtime is expensive. Rental is not a dirty word. It’s a financing choice.

In our 2024 vendor consolidation project, one supplier quoted a six-week lead time for a new Varel bit. A service company ten miles away had a rental bit on the shelf. The daily rate wasn’t cheap, but the standby cost was far worse. We rented the bit and it paid for itself in one day.

That said, rental pricing is where I’ve seen the most hidden fees. The quote says $150/day, but the final invoice includes freight, inspection, damage waiver, and a “dull grading fee” if the bit comes back with wear. None of those were in the first number they gave me. I’ve learned to ask “what’s NOT included” before I ask “what’s the price.”

The vendor who lists all fees upfront—even if the daily rate looks higher—usually costs less in the end.

Which scenario are you in?

If you’re not sure, ask three questions:

• How repeatable is the operation? If it’s the same interval and the same rig, Scenario 1.
• What’s the cost of a failed run? If it’s high, don’t take a chance on a bit with no service history.
• What’s the real deadline? If you need it this week, rental may be the only answer.

If you land between scenarios, choose the higher-risk answer. When in doubt, a new bit with a verified IADC code is the safer default. But if the cost of standing still is higher than the cost of a gamble, rental may be smarter.

And in every case, start with the chart. Know the IADC code. Know the connection size. Ask for the dull grade report when buying used or reconditioned. If a vendor can’t give you those, they’re not selling you a bit with an accurate description—they’re selling you a surprise.

One caveat: this was accurate as of early 2025. The oilfield changes fast, so verify current availability, rental rates, and product specs with your Varel distributor before you finalize a budget.