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8 1/2'' S419 Steel Body PDC Drilling Bit

Our PDC Bit is a versatile and reliable drilling tool that caters to the needs of various industries. Whether it's the oil and gas industry, mining sector, or geothermal energy exploration, this bit is engineered to deliver consistent and efficient drilling performance. It is designed to handle the rigors of different drilling environments, from shallow wells to deep, high-pressure formations. With its advanced design and quality construction, our PDC Bit offers drillers the confidence to tackle any drilling project with ease. It is a proven solution that helps to improve productivity, reduce costs, and enhance the overall success of drilling operations.
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Product Overview


The 8 1/2'' (215.9mm) S419 Steel Body PDC Drilling Bit is engineered for medium to hard formation drilling, featuring a heat-treated S419 alloy steel body with HRC 45-50 hardness. The bit integrates premium polycrystalline diamond compact (PDC) cutters (13mm diameter) arranged in 5 aggressive cutting blades, providing superior abrasion resistance. Its spiral flute design enhances cuttings evacuation, while the tungsten carbide hardfacing on gauge pads ensures 360° hole cleaning. Certified to API Spec 7-1, the bit supports rotary and steerable drilling systems, with a maximum working temperature of 150°C and weight on bit (WOB) rating up to 250kN. The fluid dynamic design includes three 16mm nozzles arranged in a pressure-balanced configuration, optimizing mud flow for efficient heat dissipation and cuttings removal.


Advantages


Enhanced Formation Adaptability


  • Optimized cutter spacing (18mm) and 22° blade angle strike a balance between aggression and stability in limestone, sandstone, and dolomite formations, reducing torque by 12% through a 15° back rake angle design

  • Proprietary cutter orientation technology improves lateral stability by 20% in dipping formations, as validated by in-house rock mechanics testing (ASTM D2938)

  • Nozzle configuration supports both water-based mud (WBM) and oil-based mud (OBM) systems, with flow rate capacity up to 600 GPM


Durable Construction


  • S419 steel body undergoes dual-stage heat treatment (quenching at 860°C + tempering at 550°C) to achieve uniform hardness, coated with 50μm nickel-chromium layer for H₂S resistance (NACE MR0175 compliant)

  • Laser-welded PDC cutters (shear strength 800MPa) use nano-sintered diamond composite, reducing cutter loss by 30% compared to conventional brazing methods

  • 15mm-wide gauge section with tungsten carbide hardfacing (HV 1200) maintains hole straightness within 0.3° deviation in deviated wells


Operational Efficiency


  • Hydraulic horsepower utilization increased by 15% through computational fluid dynamics (CFD) optimized flutes, reducing equivalent circulating density (ECD) by 8% in high-temperature wells

  • Pre-set bearing clearance (0.05-0.1mm) with silicon nitride ceramic bearings extends service life to 200+ hours under 200 RPM operation

  • MWD/LWD compatibility verified with major service providers (Schlumberger, Halliburton) for seamless integration in directional drilling programs


Applications


  • Onshore oil & gas exploration in medium-hard sedimentary basins (e.g., Permian Basin limestone intervals)

  • Geothermal well drilling in stratified rhyolite and andesite formations

  • Mining exploration for copper/nickel deposits requiring 0.1% hole straightness tolerance

  • Water well drilling in abrasive alluvial layers with >30% quartz content


Accessories


Drill Bit Protector: Rubber-coated steel guard ( Shore A 90 hardness) with anti-static lining, tested to 1.5m drop protection (ISTA 3A compliant)

Nozzle Plug Kit: Tungsten carbide nozzles (12/14/16mm) with precision-machined threads (API 5B), ensuring <0.5% pressure loss at 5000 PSI

Torque Sub: High-strength alloy sub (yield strength 1000MPa) with premium thread compound (Baker Hughes BH-12), reducing rotational vibrations by 40% in hard rock


Why Choose Us


Technical Expertise: 15+ years of PDC bit engineering, including 50+ custom designs for unconventional reservoirs like the Marcellus Shale

Global Compliance: Certified to API Spec 7-1, ISO 9001:2015, and CE PED Module B, with material traceability via blockchain-enabled MTRs

Custom Solutions: In-house 3D scanning and finite element analysis (FEA) for formation-specific cutter layout optimization

Logistics Support: Dedicated air freight partnerships ensuring 72-hour delivery to Houston, Dubai, and Singapore, with customs clearance support



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Hejian Hengji Bit Manufacture Co.,LTD  is specialized in researching and production of rock drilling bits , mainly includes tricone bits, PDC bits, HDD hole opener, foundation single roller cutters, drag bits and related tools with advanced CNC machines and R&D team.

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Junziguan industrial zone, hejian city, hebei province
+86-317 3213999
+86-18232837832
+86-18232837832
+86-18232837832
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