Product Description
In the demanding environments of deep and ultra-deep well drilling, maintaining a consistent wellbore diameter is critical. Our PDC Gauge Protection technology replaces traditional tungsten carbide and TSP materials with high-performance composite cutters, ensuring your bit stays "in-gauge" longer and performs more efficiently.
1. Product Overview & Core Parameters
Our PDC cutters for gauge protection are engineered through an Ultra-High Pressure High Temperature (HPHT) sintering process. By creating a metallurgical bond between a diamond powder layer and a tungsten carbide substrate, we deliver a product that thrives where others fail.
|
Feature |
Technical Specification |
|
Sintering Conditions |
5.5–7.0 GPa / 1,400–1,600°C |
|
Wear Coefficient |
0.07 mm³ (vs. 15–20 mm³ for Tungsten Carbide) |
|
Impact Toughness |
8–12 J/cm² |
|
Thermal Stability |
Up to 750°C (Silicon-doped diamond layer) |
|
Load Resistance |
Withstands instantaneous impact >18 kN |
2. SPECIFICATION, BENEFITS & PARAMETERS
• Ultra-Low Wear Rate: PDC gauge teeth with a wear coefficient about 1/200 of traditional tungsten carbide to avoid bit failure.
• Ultra-High Impact Resistance: Gradient distribution of Cobalt (6–10wt%) in tungsten carbide substrate to provide enough elasticity to withstand kicks.
• High Thermal Stability: Silicon doping enables diamond layer withstand temperatures of up to 750°C and easily survive bottom-hole temperatures encountered in high-temperature gas wells.
• Diameter Maintenance: Eliminates gauge wear and maintain enough weight-on-bit(WOB) & torque applied to main cutter to maintain consistent Rate of Penetration (ROP).
3. PROCESS / TECHNOLOGY
Gradient Cobalt Distribution allows Cubic Pressing of HPHT Diamonds to be embedded into tungsten carbide without delaminating like TSP. The cobalt allows for a toughened interface layer to stand up to the high-stress concentrations of gravel/ hard rock formations.
4. APPLICATIONS
• Extreme Depth: Drilling beyond 6,900 meters (>21,500') (Yuanba field).
• Gritty/Lithic Formations: Aggresive gravel layers such as those in Tarim Basin.
• High Temperature: High-temperature gas wells with bottom-hole temperatures reaching up to 210°C.
• Long-Section/Low Trip Counts: Drill long-sections where bit trips are expensive.
5. GEOMETRIES & SERVICES
We know your formation is different, that's why we offer:
• Custom Geometries: Different shapes & sizes to fit your bit gauge design.
• Material Modifications: Alter Cobalt levels or diamond grain sizes to fit your toughness vs. wear application.
• Tech. Consulting: Field test evaluation and performance improvement on your own drilling blocks.
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Product Specifications
|
Product No. |
Diameter (mm) |
Height (mm) |
Diamond thickness/mm |
Diamond Chamfer/mm |
TC Chamfer/mm |
|
0808 |
8.0±0.03 |
8.0±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
0813 |
8.0±0.03 |
13.2±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1008 |
10.00±0.03 |
8.0±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1013 |
10.00±0.03 |
13.2±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1308 |
13.44±0.03 |
8.0±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1313 |
13.44±0.03 |
13.2±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1320 |
13.44±0.03 |
20.0±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1613 |
15.88±0.03 |
13.20±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1616 |
15.88±0.03 |
16.31±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1913 |
19.05±0.03 |
13.20±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1916 |
19.05±0.03 |
16.31±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
|
1919 |
19.05±0.03 |
19.00±0.05 |
3.0±0.2 |
0.40±0.05 |
0.76±0.05 |
FAQ
Q: Why would I pick PDC over tungsten carbide(TSP) for gauge protection?
A: A: Tungsten Carbide(TSP) does have higher thermal limits, however TSP is extremely brittle (2–3 J/cm²). Our PDC is almost 4x tougher when it comes to impact. You want the highest toughness when preventing gauge chipping from the unpredictable vibrations of deep well applications.
Q: How does gauge protection with PDC help me increase ROP?
A: A: As a gauge wears down the bit runs "under-gauge" and begins to rub the body of the bit on the wellbore. Essentially losing you energy. If you use PDC gauge teeth your bit will run at full diameter allowing all your torque/energy to go into the cutters breaking rock.
Q: Will these cutters work in high temperature gas wells?
A: A: Absolutely. Our silicon-doped diamond stays stable up to 750°C. That is significantly higher than the normal 210°C bottom-hole temperatures in most high-end petroleum applications.
