PDC Drill Bits: The bits, the diamond inserts, the tungsten carbide inserts.
MWD & Downhole Motor Components: Every hour an MWD or motor operates, it wears out parts…mule shoes, rotatable connectors, electronics, motor linings, bearing packs, collars.
Mud Pumps: In particular, the expendables inside the fluid end of the pump.
Top Drives: In particular, the repair and maintenance of top drives.
Cement: And cementing additives.
Casing Hardware: Centralizers, float shoes, inflatable packers.
Pipe: There has never yet been a well drilled without pipe.