Diamond Rock Drilling 12-1/4 Inch PDC Drill Bit of API Spec
1 . Descriptions:
PDC drill bits prove to be versatile and well-suited for a range of
geological conditions, including soft rocks, hard rocks, and gravel
formations. Their broad applicability makes them a preferred choice
for various engineering projects, effectively meeting specific
project requirements.
While PDC drill bits may come with a relatively higher price tag,
their cost-effectiveness is remarkable. This is due to their
efficient performance, extended lifespan, and exceptional drilling
stability, which collectively contribute to significant economic
benefits during drilling operations.
One of the key advantages of PDC drill bits is their ability to
offer adjustable blade density and shapes. This flexibility allows
for precise drilling control and the achievement of desired
drilling outcomes, even in complex formations that demand specific
drilling approaches.
2. Specification of PDC Drill Bit :
| SPECIFICATION |
| Size : | 12-1/4 inch (311.1mm) |
| Drill Body Type : | Steel Body |
| Blades Quantity : | 5 |
| Nozzles Quantity : | 8 |
| API Connection (in) : | 6-5/8" REG |
| Gauge Length (In): | 3.0 |
| OPERATIONAL PARAMETERS |
| Weight on Bit (KN): | 89 -178 KN |
| RPM Range(Rotary): | 100- DHM |
| Flow Rate(lps): | 48- 56 LPM |
| Make-Up Torque(KN): | 51 -57 KN.M |
3 . PDC 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'S Nozzles
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 improve the
clearing of cuttings.
6. Steel Body PDC Bits
Steel body is the opposite of matrix body. It can of withstanding
high impact loads, but is softer and lacks protective features. The
strength and ductility of steel give steel-bit bodies high impact
resistance.
Steel bodies are considerably stronger than matrix bodies.
A beneficial feature of steel bits is that they can easily be
rebuilt a number of times because worn or damaged cutters can be
replaced rather easily. This is a particular advantage for
operators in low-cost drilling environments.
Polycrystalline diamond compact (PDC) drill bits are different than
roller cones in that they are one piece bodies with no moving
parts. The fixed-cutters shred the rock, so the bit is able to
operate with higher rotation speeds more efficiently in
consolidated formations.
7. Special Requirement :
