| PDC Drill Bit | Underground Formation | Rock Type | Compressive Strength(MPA) | ROP(m/h) |
| M/S112 M/S223 | Very soft: Sticky soft formation with low compressive strength. | Clay Siltstone Sandstone | <25 | >20 |
| M/S222 M/S323 | Soft: Soft formation with low compressive strength and high availability | Clay rock Marl lignite Sandstone | 25~50 | 10~20 |
| M/S323 M/S433 | Medium Soft: Soft to medium formation with low compressive strength and steak | Clay rock Marl Lignite Sandstone Siltstone Anhydrite | 50~75 | 5~15 |
| M322 M443 | Medium: Medium to hard formation with high compressive strength and thin abrasive streak | Mudstone Dark rock shale | 75~100 | 2~6 |
| M422 M444 | Medium hard: Hard and dense formation with high compressive strength and medium avrasiveness | Dark rock hard shale Anhydrite Sandstone Dolomite | 100~150 | 1.5~3 |
| \ | Hard formation | Better only choose tricone bits. PDC bits is not suitable in the drilling rock formation. | ||
Bit Body: The main structure of the entire drill bit, used to mount cutting teeth, water channels, nozzles, etc. It comes in two types: steel body and matrix body.
Steel body drill bits: Easy to machine, good flowability, suitable for soft formations.
Matrix body drill bits: High wear resistance, suitable for hard, abrasive formations.
PDC Cutting Teeth : Constructed from a polycrystalline diamond layer welded to a cemented carbide substrate, they are the main rock-breaking components of the drill bit.They break rocks through shearing action. The arrangement angle, number, and position directly affect drilling speed and lifespan.
Blade: The load-bearing structure that mounts the PDC cutting teeth, generally arranged in a spiral pattern. Its function is to support the cutting teeth, form a chip removal channel, and control the structural strength and guidance of the drill bit.
Nozzle: Mounted on the drill bit face, used to spray drilling fluid to cool the cutting teeth, clean the bottom hole, and remove rock cuttings.
Flow Channel: The channel through which drilling fluid ejected from the nozzle flows, ensuring fluid reaches the bottom of the well, cools the drill bit surface, and removes cuttings.
Gauge Protection: Located on the outer edge of the drill bit, typically composed of wear-resistant materials (such as tungsten carbide or PDC plates), it maintains the wellbore diameter, prevents wear and shrinkage, and improves directional stability.
Steel Body: Supports the entire drill bit structure, ensuring strength and wear resistance; it is the “skeleton” of the drill bit.
