12 1/4 IADC 117 Milled Tooth Drill Bit China Factory Suppliers(2026 Edition)

High-performance 12 1/4 IADC 117 milled tooth drill bits from a leading China factory. Ideal for soft to medium formations like clay, shale, sandstone, and limestone. Contact top suppliers for durable, API standard drilling solutions.

SupplierHEJIAN YINRUH DRILL BIT MANUFACTURE CO., LTD.www.yhrockdrill.com

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About this product

Product information from the supplier.

The 12 1/4" IADC 117 Milled Tooth Drill Bit is a high-performance cutting tool engineered specifically for well drilling operations. Designed to tackle soft to medium-hard formations, this bit combines robust structural integrity with precision engineering to ensure maximum penetration rates and operational efficiency in challenging subsurface environments.

Featuring an advanced Journal Sealed Bearing system and optimized nozzle configurations, this milled tooth bit is built for durability and stability. It provides an ideal balance of impact resistance and cutting speed, making it a reliable choice for operators seeking to reduce downtime and optimize drilling costs in conventional well construction.

Detailed Parameters

Bit Size (in)	12 1/4	Bit Size (mm)	311
Bearing Type	Journal Sealed Bearing/ Rubber O-Ring	Tooth Type	Milled Tooth
Nozzle Quantity	3	Connection	6-5/8″ API REG
Recommended RPM	150-80 r/min	Recommended WOB	0.35-0.8 KN
Net Weight	90 kg	Gross Weight	95 kg

Key Advantages

High Cutting Speed

Engineered for rapid penetration in soft to medium-hard formations, significantly reducing drilling time.

Anti-Balling Design

Strong self-cleaning ability effectively prevents bit balling, maintaining consistent performance.

Superior Impact Resistance

Built to withstand heavy shocks and vibrations, ensuring stability in various drilling conditions.

Precision Engineering

Utilizes high-grade milled tooth geometry for optimized rock fragmentation and chip removal.

Sealed Bearing System

Journal sealed bearings with rubber O-rings protect against contaminants and extend tool life.

API Standardized

Compliant with 6-5/8″ API REG connections for seamless integration with global drilling rigs.

Product Gallery

Management Platforms

Inventory Control

Real-time tracking of drill bit stock levels to ensure zero project delays.

Performance Monitoring

Analyze ROP (Rate of Penetration) to optimize WOB and RPM settings.

Maintenance Alerts

Automated notifications for tool inspection and seal replacements.

Quality Assurance

Strict adherence to API and IADC standards through digital QC logs.

Logistics Tracking

Global shipping monitoring for rapid delivery to remote drilling sites.

Technical Support

24/7 remote access to engineering experts for on-site troubleshooting.

Investment Return Comparison

Performance Metric	Standard Milled Bit	IADC 117 Optimized Bit	Improvement
Penetration Rate	Baseline	High Efficiency	+20-30%
Tool Lifespan	Average	Extended	+15%
Balling Frequency	Occasional	Very Low	Significant
Operating Cost	Standard	Reduced per Foot	-12%
Down-time Risk	Moderate	Low	Minimized

Frequently Asked Questions

Q: What are the ideal geological formations for the 12 1/4" Milled Tooth Bit?

This bit is specifically optimized for soft to medium-hard formations, providing the best balance of speed and durability in these conditions.

Q: How should WOB and RPM be managed for this drill bit?

We recommend an RPM of 80-150 and a WOB of 0.35-0.8 KN. Note that upper limits of both should not be used simultaneously to prevent premature wear.

Q: What is the benefit of the Journal Sealed Bearing system?

The Journal Sealed Bearing combined with Rubber O-Rings ensures that lubrication is maintained while preventing drilling fluids and debris from entering the bearing assembly.

Q: Is this bit compatible with standard API drilling rigs?

Yes, it features a 6-5/8″ API REG connection, which is a global industry standard for well drilling equipment.

Q: How does the "self-cleaning ability" work in this bit?

The nozzle placement and tooth geometry are designed to maximize fluid flow, which flushes cuttings away rapidly and prevents the bit from "balling up" in sticky formations.

Q: Can this bit be used for hard rock drilling?

While highly effective for soft to medium-hard rock, for very hard or abrasive formations, we recommend our PDC or TCI Tricone bits for better wear resistance.