Rock Drilling Bit 17-1/2 Inch Steel Body Diamond PDC Drill Bit of
API Spec
1 . PDC Drill Bit Descriptions:
PDC bits are specifically engineered for high-speed drilling in
shale, limestone, and sandstone formations. Diverging from roller
cones, these polycrystalline diamond compact (PDC) drill bits are
solid bodies without any movable components.
There are steel body and Matrix body PDC Bit . The two bit are the
same just different on the material and manufacutre process
Different .
The Steel body are used on the middle hard to hard formation, Then
matrix body are used on the hard fromation to very hard formation .
Steel body advantage is : price is lower than matrix bdoy at the
same condition . But steel body can improve the blades accounts to
improve the cutter performance .
2. PDC Drill Bit Specification:
Polycrystalline diamond compacts PDC bit in the Oil and Gas
Industry PDC bits get their name from the polycrystalline diamond
compacts used for their cutting structure. A PDC bit is a drill bit
fitted with industrial diamond cutters instead of hardened metal
teeth.
| BIT DESIGN |
| size | 17-1/2inch |
| IADC Code | S333 |
| Body type | Steel Body |
| Blade Count | 8 |
| Primary Cutter Size | Ф16 mm |
| Gage Cutter | Ф16 mm |
| Nozzles | #10*5 |
| Gauge Length | 3.5" in |
| API Connection | 7-5/8REG |
| Weight | 228KG |
| OPERATIONAL PARAMETERS |
| Weight on Bit (KN): | 66-198 |
| RPM Range(Rotary): | 100- DHM |
| Flow Rate(lps): | 28- 39 LPM |
| Make-Up Torque(KN): | 900-1200KN.M |
3 . PDC Drill Bit profile
4 . PDC Drill Bit 'S Cutters
Polycrystalline Diamond Composite (PDC) cutters are the main point
of contact for a drill bit. PDC bits remove the rock mainly by
shearing.
The PDC cutters are exposed to a lot of heating and cooling down
the well, a very challenging environment.
PDC cutters that have lower thermal degradation and more thermal
stability generally achieve higher ROP and increased wear
resistance. So, optimizing the cutter is important.
5. PDC Drill Bit Nozzles
PDC Drill bit nozzles help clear the cutting area and cool the
Polycrystalline Diamond Composite (PDC) cutters.
Effective placement of these nozzles along with the angle they are
set at plays a critical role on how efficient the drill bit
performs.
Fluid channels also complement nozzle placement to imp
