PDC Diamond Bit 17-1/2 Inch PDC Insert Bit Of Oilfield Drill Bit
1. Description :
Steel body of PDC Drill Bit is the opposite of matrix body bit . 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 of PDC
Drill Bit .
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.
2. Specification
| SPECIFICATION |
| Size : | 17-1/2 " (444.5mm) |
| Drill Body Type : | Steel Body |
| Blades Quantity : | 7 |
| Nozzles Quantity : | 11 |
| API Connection (in) : | 7-5/8" REG |
| Gauge Length (In): | 4 |
| OPERATIONAL PARAMETERS |
| Weight on Bit (KN): | 67- 200 |
| RPM Range(Rotary): | 100-DTH |
| Flow Rate(lps): | 57- 76 |
| Make-Up Torque(KN): | 82-91 |
3. PDC Drill Bit Profile
4. PDC Drill Bit 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
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. Matrix Body
Matrix is a very hard, rather brittle complex material containing
tungsten carbide grains bonded with a softer, tougher, metallic
binder.
The hardness of a matrix-body PDC has the benefit of not being
susceptible to abrasion and erosion. It is effective in tolerating
high compressive loads, but, compared with steel, has low
resistance to impact loading.
Matrix-body PDC bits are relatively diverse, because matrix is a
compounded material.
In environments in which body erosion is likely to cause a bit to
fail, matrix-body PDC are the preference over steel-body bits. For
diamond-impregnated bits, only matrix-body construction can be
used.
