Running PDC Bit
The following guidelines are produced to highlight the major considerations when running a PDC bit in order to achieve optimum performance.

1. Junk in Hole

- Make sure the bottom of the hole is free of junk and debris as the PDC cutters will be destroyed if drilling steel elements are left in the hole.

2. Fully evaluate the previous bit for gauge deterioration.

- Prior to running a PDC bit it is important to check the gauge on the bit which has just been pulled out of the hole.
https://www.drillingmanual.com/running-pdc-bit/