Oil Rig Drill Bit 17 Inch PDC Drill Bit of API Spec Bit
1. Description :
Steel is the opposite of matrix of PDC Drill 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.
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. PDC Drill Bit Specification
SPECIFICATION
|
| Size : | 17 " (431.8mm) |
| Drill Body Type : | Steel Body |
| Blades Quantity : | 7 |
| Nozzles Quantity : | 11 |
| API Connection (in) : | 7-5/8" REG |
| Gauge Length (In): | 3 |
OPERATIONAL PARAMETERS
|
| Weight on Bit (KN): | 67- 200 KN |
| RPM Range(Rotary): | 100-DTH |
| Flow Rate(lps): | 57- 76 lps |
| Make-Up Torque(KN): | 81 - 92 KN |
3. PDC Drill Bit Profile
4. PDC Drill Bit Cutters
Polycrystalline Diamond Composite (PDC) cutters of PDC 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's 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. PDC Matrix Body
Matrix of PDC drill bit 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.
