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Built on an S419 steel body and a five-blade cutting structure, this 8 1/2'' PDC drilling bit balances aggressiveness with lateral stability in interbedded limestone, sandstone, and dolomite. The cutters shear rock cleanly while the spiral flutes sweep cuttings away, keeping the hole face visible to the fluid and the bit quietly “on bottom.” The nickel-hardened gauge pads resist abrasive wear, so you maintain full gauge, fewer wiper trips, and a smoother BHA ride.
Operators typically deploy this bit as a workhorse for vertical and directional intervals where consistent ROP, predictable torque response, and easy MWD/LWD compatibility matter more than chasing a single record run. From geothermal kick-offs to water-well sections, it’s designed to show up, run steady, and reach TD without drama.
Formation-matched cutting structure: Five blades with 13 mm cutters deliver a confident bite without chatter in medium-to-hard sequences—ideal when the geology swings from friable sands to cemented streaks.
Hydraulic cleanliness by design: Three precision jetted nozzles focus flow at the bit face; cuttings leave fast, torque stays smooth, pumps sound even. Less regrind, less heat.
Hardwearing gauge: Full-circumference tungsten-carbide hardfacing protects the last line of diameter control, helping maintain hole quality for casing and ream runs.
Thermal and chemical resilience: Heat-treated steel body and robust cutter braze deliver stability in high-temperature OBM and WBM environments.
Serviceability: Standard API REG pin, straightforward nozzle swaps, and conventional break-in practices keep crews moving with minimal learning curve.
| Item | Value |
|---|---|
| Bit Size | 8 1/2'' (215.9 mm) |
| Model | S419 Steel Body PDC Drilling Bit |
| Body Material | S419 alloy steel, heat-treated (approx. HRC 45–50) |
| Blade Count | 5 blades |
| Primary Cutter | 13 mm PDC cutters |
| Nozzles | 3 × 16 mm jetted nozzles |
| Gauge Protection | Tungsten-carbide hardfacing on gauge pads |
| Flow Capacity | Up to ~600 GPM (design dependent) |
| Max Operating Temperature | Up to ~150°C (design dependent) |
| Standards | API Spec 7-1 (manufacturing compliance) |
| Recommended Mud Systems | WBM / OBM |
| Connection | 4-1/2'' API REG PIN (typical for this size class) |
Size & Connection: Diameter, face profile, API REG connection options.
Blade/Cutter Architecture: Blade count, cutter size and grade, back-rake, cutter layout logic.
Hydraulics: Nozzle quantity/size, jetting vs. big-flush designs, flow windows.
Operating Windows: Recommended WOB, RPM, flow rates, and compatible mud systems.
Formation Envelope & Use Cases: From soft to hard strata, vertical vs. directional, HDD vs. oilfield vs. geothermal vs. water well.
Materials & Protection: Body type (steel/matrix), gauge hardfacing, erosion-resistant features.
Standards & Compliance: API 7-1, ISO-based QMS, inspection practices.
Packaging & Logistics: Crating specs, common lanes, lead times, export readiness.
Customization: Cutter grade upgrades, blade count changes, nozzle kits, sidetrack and bi-center options.
After-Sales/Warranty: Consumables support, nozzle packs, bit breakers, basic warranty language.
These modules align with how engineers, procurement, and field supervisors evaluate PDC bits in RFPs and on supplier pages.
Productivity with predictability: The S419 steel body and balanced five-blade pattern deliver steady ROP while protecting gauge—less time lost to torque spikes or unexpected trips.
Integration without friction: Standard API connections, common nozzle sizes, and conventional make-up/torque values streamline rig-up across mixed fleets.
Quality system discipline: Manufacturing and inspection practices aligned to API Spec 7-1 and ISO-style QMS reduce variation and help every bit run like the last one.
Application support: Formation review, nozzle selection guidance, and post-run dull grading help your team lock in repeatable performance well to well.
Q1. Which formations suit this 8 1/2'' S419 PDC bit best
Medium to hard, including limestone, sandstone, and dolomite with abrasive stringers. The five-blade layout and 13 mm cutters balance speed and stability in interbedded sections.
Q2. What operating window should we plan for
Plan conventional PDC practices in this diameter: moderate WOB with steady RPM and sufficient flow to keep the face clean. Nozzle swaps allow you to tune hydraulics for WBM or OBM and maintain a cool, debris-free cutting zone.
Q3. Can we customize the bit for a specific interval
Yes. Typical levers include cutter grade, back-rake, secondary chamfers, nozzle sizing, and optional gauge features. Share lithology, interval length, planned mud, and rig limits to receive a configuration that matches your objectives.
Q4. How does it lower total well cost
By holding gauge, clearing cuttings efficiently, and limiting torque spikes, the bit reduces non-productive time—fewer wiper trips, cleaner casing runs, and more consistent ROP across the section.
Built on an S419 steel body and a five-blade cutting structure, this 8 1/2'' PDC drilling bit balances aggressiveness with lateral stability in interbedded limestone, sandstone, and dolomite. The cutters shear rock cleanly while the spiral flutes sweep cuttings away, keeping the hole face visible to the fluid and the bit quietly “on bottom.” The nickel-hardened gauge pads resist abrasive wear, so you maintain full gauge, fewer wiper trips, and a smoother BHA ride.
Operators typically deploy this bit as a workhorse for vertical and directional intervals where consistent ROP, predictable torque response, and easy MWD/LWD compatibility matter more than chasing a single record run. From geothermal kick-offs to water-well sections, it’s designed to show up, run steady, and reach TD without drama.
Formation-matched cutting structure: Five blades with 13 mm cutters deliver a confident bite without chatter in medium-to-hard sequences—ideal when the geology swings from friable sands to cemented streaks.
Hydraulic cleanliness by design: Three precision jetted nozzles focus flow at the bit face; cuttings leave fast, torque stays smooth, pumps sound even. Less regrind, less heat.
Hardwearing gauge: Full-circumference tungsten-carbide hardfacing protects the last line of diameter control, helping maintain hole quality for casing and ream runs.
Thermal and chemical resilience: Heat-treated steel body and robust cutter braze deliver stability in high-temperature OBM and WBM environments.
Serviceability: Standard API REG pin, straightforward nozzle swaps, and conventional break-in practices keep crews moving with minimal learning curve.
| Item | Value |
|---|---|
| Bit Size | 8 1/2'' (215.9 mm) |
| Model | S419 Steel Body PDC Drilling Bit |
| Body Material | S419 alloy steel, heat-treated (approx. HRC 45–50) |
| Blade Count | 5 blades |
| Primary Cutter | 13 mm PDC cutters |
| Nozzles | 3 × 16 mm jetted nozzles |
| Gauge Protection | Tungsten-carbide hardfacing on gauge pads |
| Flow Capacity | Up to ~600 GPM (design dependent) |
| Max Operating Temperature | Up to ~150°C (design dependent) |
| Standards | API Spec 7-1 (manufacturing compliance) |
| Recommended Mud Systems | WBM / OBM |
| Connection | 4-1/2'' API REG PIN (typical for this size class) |
Size & Connection: Diameter, face profile, API REG connection options.
Blade/Cutter Architecture: Blade count, cutter size and grade, back-rake, cutter layout logic.
Hydraulics: Nozzle quantity/size, jetting vs. big-flush designs, flow windows.
Operating Windows: Recommended WOB, RPM, flow rates, and compatible mud systems.
Formation Envelope & Use Cases: From soft to hard strata, vertical vs. directional, HDD vs. oilfield vs. geothermal vs. water well.
Materials & Protection: Body type (steel/matrix), gauge hardfacing, erosion-resistant features.
Standards & Compliance: API 7-1, ISO-based QMS, inspection practices.
Packaging & Logistics: Crating specs, common lanes, lead times, export readiness.
Customization: Cutter grade upgrades, blade count changes, nozzle kits, sidetrack and bi-center options.
After-Sales/Warranty: Consumables support, nozzle packs, bit breakers, basic warranty language.
These modules align with how engineers, procurement, and field supervisors evaluate PDC bits in RFPs and on supplier pages.
Productivity with predictability: The S419 steel body and balanced five-blade pattern deliver steady ROP while protecting gauge—less time lost to torque spikes or unexpected trips.
Integration without friction: Standard API connections, common nozzle sizes, and conventional make-up/torque values streamline rig-up across mixed fleets.
Quality system discipline: Manufacturing and inspection practices aligned to API Spec 7-1 and ISO-style QMS reduce variation and help every bit run like the last one.
Application support: Formation review, nozzle selection guidance, and post-run dull grading help your team lock in repeatable performance well to well.
Q1. Which formations suit this 8 1/2'' S419 PDC bit best
Medium to hard, including limestone, sandstone, and dolomite with abrasive stringers. The five-blade layout and 13 mm cutters balance speed and stability in interbedded sections.
Q2. What operating window should we plan for
Plan conventional PDC practices in this diameter: moderate WOB with steady RPM and sufficient flow to keep the face clean. Nozzle swaps allow you to tune hydraulics for WBM or OBM and maintain a cool, debris-free cutting zone.
Q3. Can we customize the bit for a specific interval
Yes. Typical levers include cutter grade, back-rake, secondary chamfers, nozzle sizing, and optional gauge features. Share lithology, interval length, planned mud, and rig limits to receive a configuration that matches your objectives.
Q4. How does it lower total well cost
By holding gauge, clearing cuttings efficiently, and limiting torque spikes, the bit reduces non-productive time—fewer wiper trips, cleaner casing runs, and more consistent ROP across the section.
