Description
6″ PDC Drill Bit — Model LS1655ER (IADC S333)
5-Blade PDC Drill Bit with Dual Cutter Technology (φ16.05mm & φ13.44mm) & 7-Nozzle Layout for Medium to Medium-Hard Formations
Size: 6 in
IADC Code: S333
Blades: 5
Connection: 3 1/2″ API REG
Key Performance Advantages for Drilling Operations:
- Dual Cutter Size Layout (φ16.05mm & φ13.44mm): Combines larger primary cutters for maximum rock shearing with optimized secondary cutters for impact resistance and smooth torque balance.
- 7-Nozzle Hydraulic System (W16X7): Engineered with 7 dedicated fluid outlets to maximize bottom-hole cleaning, maintain low thermal stress on cutters, and prevent bit balling.
- IADC S333 Heavy-Duty Design: Features a rugged 5-blade body built to withstand interbedded layers in medium to medium-hard geological formations.
Product Overview & Technical Description
The LS1655ER is a premium 6″ PDC (Polycrystalline Diamond Compact) Drill Bit certified under IADC S333. Specially engineered for challenging medium to medium-hard rock strata, this bit incorporates a durable 5-blade architecture integrated with dual-diameter PDC cutters (φ16.05mm and φ13.44mm).
Equipped with an advanced 7-nozzle hydraulic design (W16X7) and a standard 3 1/2″ API REG pin connection, the 6″ LS1655ER ensures balanced mud flow distribution across all junk slots. This enhanced hydraulic efficiency cools the cutters rapidly and flushes drill cuttings away instantly, maintaining steady Rate of Penetration (ROP) and prolonging overall bit service life.
Technical Specifications — Model LS1655ER
| Parameter | Specification Value | Engineering Context / Notes |
|---|---|---|
| Bit Size | 6″ | Standard 6-inch hole diameter |
| Bit Type | LS1655ER | PDC fixed-cutter series |
| IADC Code | S333 | Steel/Matrix body, medium to medium-hard formation rating |
| Number of Blade | 5 | 5-blade configuration for enhanced cutter density and stability |
| Cutter Type | PDC | Polycrystalline Diamond Compact shear cutters |
| Primary Cutter Size | φ16.05, φ13.44 mm | Dual cutter design balancing aggressive shearing and impact toughness |
| Nozzle Quantity | 7 | High-density multi-port fluid distribution |
| Nozzle Type | W16X7 | 7-nozzle specification for maximized hydraulic horsepower |
| Rotary Speed (RPM) | 60 – 300 RPM | Wide operating speed range for top drives and downhole PDM motors |
| Weight On Bit (WOB) | 10 – 70 kN (Recommend 20 – 40 kN) | Flexible weight loading window for precise penetration control |
| Hydraulic Flow Rate | 12 – 20 Lps | Optimal volumetric flow rate for bottom-hole clearing |
| Make Up Torque | 7.1 – 11.4 kN.m | Recommended API connection makeup torque |
| API Pin Connection | 3 1/2″ API REG | Standard 3 1/2 inch API Regular thread connection |
Field Problems Solved by LS1655ER PDC Bit
1. Problem: Impact Chipping in Interbedded Rock Layers
Solution: Dual cutter configuration (φ16.05mm + φ13.44mm) distributes structural loads effectively, reducing micro-chipping in harder formations.
2. Problem: Fluid Recirculation & Bit Balling
Solution: The 7 W16X7 nozzle system provides targeted fluid streams across all 5 blade channels, ensuring rapid evacuation of cuttings at flow rates up to 20 Lps.
3. Problem: Rapid Thermal Wear on PDC Cutters
Solution: Multi-nozzle hydraulic placement ensures continuous coolant coverage over every cutter face, extending diamond table lifespan during prolonged runs.
4. Problem: Severe Stick-Slip & High Torque Fluctuations
Solution: The 5-blade profile balances downhole torque during high-speed rotation (60-300 RPM), creating smoother directional and straight-hole drilling.
Recommended Operating Parameters & Guidelines
To maximize operational efficiency and bit life with the 6″ LS1655ER PDC Bit, adhere to the following field guidelines:
- Weight on Bit (WOB): Maintain standard operation between 20 and 40 kN (acceptable total range 10-70 kN). Apply weight smoothly upon bottom contact.
- Rotary Speed (RPM): Run between 60 and 300 RPM based on formation resistance and downhole motor specifications.
- Hydraulic Flow Rate: Keep fluid flow between 12 and 20 Lps to ensure full hydraulic cooling and flushing performance across all 7 nozzles.
- Make-up Torque: Torque connection to 7.1 – 11.4 kN.m using high-quality API thread lubricant.
Frequently Asked Questions (FAQ)
