Roller Cone Bit Performance
Roller Cone Bit Performance

Criteria Of Bit Performance
The performance of a bit may be judged on the following criteria:

- How much footage it drilled (ft).
- How fast it drilled (ROP).
- How much it cost to run (the capital cost of the bit plus the operating costs of running it in hole) per foot of hole drilled .

Since the aim of bit selection is to achieve the lowest cost per foot of hole drilled the best method of assessing the bits’ performance is the last of the above.
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