مته سه‌مخروطی Feilong ۸ ۳/۸ | IADC 537 | با بلبرینگ ژورنال و آب‌بند فلزیTCI
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قطر: ۲۱۲٫۷ میلی‌متر | اتصال: "۱/۲ ۴ API REG | وزن: ۳۸٫۵ کیلوگرم (خالص)
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سازند هدف: نرم تا متوسط (شیل، آهک، ماسه‌سنگ) با لایه‌های سخت و ساینده
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ساختار برشی: اینسرت‌های قاشقی آفست (ردیف داخلی) + گوه‌ای (ردیف بیرونی و پاشنه) با فاصله‌گذاری نامنظم برای کاهش ارتعاش و شکست کاربید
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بلبرینگ: ژورنال با آب‌بند فلز-به-فلز — مقاوم در برابر دما، سیال خورنده و سایش؛ عمر بیشتر و سفر کمتر
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حفاظت گیج (اختیاری): روکش کاربید تنگستن روی شِرتیل + اینسرت پاشنه — حفظ قطر کامل چاه
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پارامترهای عملیاتی: RPM ۵۰–۲۲۰ | WOB ۰٫۴۵–۱٫۰ kN/mm | گشتاور بستن ۱۶٫۳–۲۱٫۷ kN·m
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مزایای کلیدی: نرخ نفوذ بالا، هزینه کمتر به ازای هر متر، عمر عملیاتی طولانی، هدایت‌پذیری عالی (عمودی/موتور/RSS)، انطباق کامل با API
- کاربرد: حفاری نفت و گاز، چاه آب و پروژه‌های مهندسی عمران
Tricone Drill Bit Feilong 8 3/8"- IADC 537
The 8 3/8-inch tricone drill bit (IADC 537) by Feilong Ruituo is engineered for soft to medium formations, combining a precision journal bearing with an advanced metal-to-metal seal that outperforms conventional elastomeric seals in high-temperature, chemically aggressive, and highly abrasive downhole conditions. This sealing technology prevents cuttings and mud ingress, extending bit life and reducing costly trips
:Key Specifications
Nominal Diameter: 212.7 mm (8 3/8")
Connection: 4 1/2" API REG
Weight: 38.5 kg net / 41.5 kg gross
Overall Height: 350 mm
Packaging: 530 × 290 × 290 mm robust cartons
IADC Code: 537 — TCI inserts (5), soft-to-medium formations (3), sealed journal bearing with metal-to-metal seal (7)
Bearing System: Precision journal bearing with metal-to-metal seal
Cutting Structure: Offset crested scoop inserts (inner rows) + wedge-shaped carbide inserts (outer rows and heel), with non-uniform spacing to disrupt harmonic vibrations and prevent carbide fatigue
Gauge Protection (optional): Tungsten carbide hardfacing on shirttail leading edges + carbide inserts at cone heel — maintains full-gauge hole diameter
Recommended Operating Parameters
Rotary Speed: 50–220 RPM
Weight-on-Bit: 0.45–1.0 kN per mm of bit diameter
Make-up Torque: 16.3–21.7 kN·m
Target Formations
Medium-soft shales, limestones, sandstones, and medium-strength formations containing harder, abrasive interbeds
Competitive Advantages
Superior ROP: Optimized insert arrangement delivers high penetration rates in soft-to-medium formations, reducing rotating hours and cost-per-meter
Premium Carbide Quality: Rigorously controlled sintering ensures wear resistance, consistent performance, and fewer bit trips
Metal-Sealed Journal Bearing: Greater load capacity, shock resistance, and thermal stability versus open or rubber-sealed designs — longer runs, fewer failures, lower fishing risk
Exceptional Steerability: Suitable for vertical wells, motor-assisted directional drilling, and rotary steerable systems (RSS) across a wide range of trajectories
Operational Flexibility: Broad RPM window (50–220) accommodates conventional rotary, PDM, and RSS applications; clearly defined WOB and torque specs enable repeatable optimal performance.
Full API Compliance: Threaded connection conforms to API 4-1/2 REG; dimensional accuracy within tight tolerances; comprehensive QC from raw material certification to final functional testing.
:Bottom Line
With its synergistic combination of journal bearing with metal seal, advanced carbide insert technology, and effective gauge protection, the 8 3/8" IADC 537 tricone bit is a smart, cost-effective investment for drilling contractors, oilfield service companies, and national oil companies — delivering higher penetration rates, lower cost per meter, extended bit life, superior borehole quality, and minimized operational risk.
Applications: Oil and gas drilling, water well drilling, and civil engineering projects
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