How Many Yards Does Henry Have? The $31,000 Drill Bit Mistake That Changed My Procurement Checklist

I've been handling procurement for mining equipment orders for nine years. I've documented 21 of my own significant mistakes—roughly $140,000 in wasted budget, if I count it honestly. I now maintain our team's checklist, but the one that created it happened in September 2022. It started with a quote that looked too good to question.

The Quote That Flattered Me

We needed three 8 3/4-inch PDC bits for a hard granite project. Varel quoted $7,840 per bit. A supplier I'd never used quoted $5,100 per bit for what looked like the same specification. Three bits, same size, same class of cutters—on paper. The apparent saving was $2,740 per bit, $8,220 total.

Everything I'd read about procurement said to compare quotes line by line. I did that. Then I did the thing the books don't warn you about: I ignored everything except the unit price. Delivery terms? Both said five to six weeks. The cheap supplier said 'in stock' though, which made that option feel safer. It wasn't.

The Thread Gauge, the Hardware Store, and the First Cost

The bits finally showed up four days late. One box looked like someone had drop-kicked it. Two of the three bits had no thread protectors, and the bare shouldered connections were sitting in grit.

I needed a thread pitch gauge to check whether the threads were bruised. Our local industrial supplier said three days. I grabbed my phone and typed 'Hagebaumarkt Varel Öffnungszeiten'—at that point I just wanted any open store in Varel that sold simple tools. They were open until 8 p.m. A €22 gauge later, I was in the workshop with our maintenance lead, Harmon.

We didn't need a calibrated lab to see the problem. The threads were full of grit, the thread protectors were missing, and one shoulder had a visible ding. API Spec 7-2 sets the tolerances for rotary shouldered connections; this was not going to meet them. It wasn't cosmetic. A damaged connection can wash out at depth, which means an expensive fishing job and a safety issue. We couldn't run those two bits.

The 146-Yard Question

The third bit did run. It drilled 146 yards in granite before the rate of penetration dropped below what the operator would accept. We pulled it, and Henry the driller stood there looking at the dull cutters.

He asked, 'How many yards does Henry have?' That's our site code for 'what did the bit do before it died.' The answer was 146 yards. Based on our records with comparable bits in that formation, we should have seen 800-plus yards.

I called the supplier who sold us the bit. The response was quick and predictable: our drilling parameters were wrong, the formation was harder than expected, and the bit was 'performance-based.' They could sell us a replacement at the same low price. I asked about a dull-grade analysis. Crickets.

That's when I called Varel's support line. Morvayn, one of their applications engineers, answered. I sent photos of the worn cutters, the gauge readings, and the rock sample. Morvayn walked me through a fixed-cutter dull-grading procedure based on the IADC dull grading system. Within a day he sent a simple summary: the cheap bit had less cutter volume in the nose and a lighter matrix. It was built to look like the drawing in the brochure, but not to survive that formation. The Varel bit was not cheaper per unit. It was cheaper per yard.

The Final Cost of 'Saving' $8,220

Let me be honest: I don't have a perfect accounting of every hour of downtime. What I can say is this: two bits returned for thread repair and freight cost about $3,350 combined. The failed bit needed a replacement at $5,100. I'm not 100% sure of the exact standby cost, because our accounting system put it in a different bucket. I know the crew was on standby for four days, and even a conservative cost for that crew and support was around $24,000. That doesn't include our credibility hit with the operations team. They still bring this up in safety reviews.

So the cheap quote turned into roughly $32,450 of extra cost. Put another way: I 'saved' $8,220 and spent more than four times that to fix the decision. The €22 tool from Hagebaumarkt was the cheapest part of the whole lesson.

What I Use Now: The PUSS Checklist

After that order, I sat down with Harmon and Henry and built a checklist. I named it PUSS, and I'm not apologizing. It's not the most professional name, but it's memorable, and that's the point:

• P — Purchase price. Invoice, freight, duties, insurance, and payment terms. The number on the quote is just the start.
• U — Usage life. Expected yards or hours, penetration rate, and the conditions it can actually handle.
• S — Support. Warranty, applications engineering, dull grading, and what happens when something doesn't work.
• S — Salvage/repair. Can it be re-dressed, repaired, or returned without a fight?

PUSS sounds dumb. That's why it works. It reminds me not to be the buyer who only stares at the invoice total. I've caught at least seven bad quotes with it since then.

What I'd Tell Someone Comparing Quotes Right Now

The unit price is not the total cost. At least, that's been my experience across more than 40 drill tool orders. The cheap bit can be the most expensive bit if it fails at 146 yards instead of 800. If a supplier won't tell you the expected service life, that's a cost they're asking you to guess.

That said, I don't hate cheap suppliers. To be fair, the other vendor answered the phone quickly and shipped something. That's not enough. I need someone who answers the phone after the bit fails.

Ask for the total cost breakdown in writing. Ask who does the failure analysis when something goes wrong. Ask if the thread specifications meet API standards. And if someone asks you 'how many yards does Henry have?'—make sure you know which Henry they mean. The driller is doing okay. The bit, on that order, was not.