It drilled about 500 feet of blue clays and unconsolidated sands, and this video shows the condition it was in afterward. From the wear patterns and general appearance, it’s clear the rebuild quality was far from ideal.

Key issues observed:
-Poor quality inserts and dull cutters
-Evidence of uneven wear and possible balance issues
-Likely insufficient quality control during the rebuild process

What’s even more surprising? This bit is still in service nearly 3 years later, regularly used for drilling surface casing holes. It’s estimated to have drilled close to 1500 feet total since that rebuild.

Takeaway: This is a strong reminder that not all rebuild shops are created equal. When you rely on rebuilt bits, the rebuild quality directly affects:
-Drilling efficiency
-Tool life
-Bottom hole assembly (BHA) vibration
-And ultimately, well cost

It may be time to reconsider the rebuild provider and establish stricter acceptance criteria before a bit goes back in hole