12 1/4'' inches 311.1mm IADC 617 TCI Tricone Drill Bit For Hard Rock Drilling

Tricone drill bits are among the most commonly used and classic bits in petroleum, natural gas, geological exploration, water well and engineering drilling. By means of three rotating cones, the teeth on the cones crush rocks through rolling, impacting and shearing. They are adaptable to various formations from soft to medium and hard, featuring high drilling efficiency, long service life and good stability.

keyword:

tricone drill bit tricone bit tci tricone bit tricone rock bit tricone roller bit drill bit tci bit tricone cone bit

Category:

Introduction

Tricone drill bits are among the most commonly used and classic bits in petroleum, natural gas, geological exploration, water well and engineering drilling.

By means of three rotating cones, the teeth on the cones crush rocks through rolling, impacting and shearing. They are adaptable to various formations from soft to medium and hard, featuring high drilling efficiency, long service life and good stability.

TCI Tricone Bit is suitable for soft to hard formation such as clay,mudstone,limestone,sandstone,hard shale,dolomite, etc. Tricone bit with high strength toughness of carbide tooth reduces rate of gear broken and with high-performance wear resistant materials improve the wear resistance and service life of the bit.

Features

1.Bearing Structure: High precision journal bearing with two thrust faces. Ball locked cone. Hardfaced head bearing surface. Cone bearing inlaid with friction reducing alloy and then silver-plated. Abrasion resistance and seizure resistance of the bearing are improved, and suitable for high rotary speed.

2.Cutter: premium carbide teeth having increased resistance to breaking and abrasion, maximum increase cutting structure operating life.

3.Gauge protection: more tungsten carbide inserts are placed in the gauge to reduce the wear in the abrasive formation. It can protect gauge and increases the stability and life of the bit.

4.Nozzle：These nozzles are much sturdier and provide greater flow capacity and maximize fluid distribution to the cones.

Product specifications
Diameter	12 1/4''(311.1mm)
Bearing type	Rubber Sealed Bearings
Tooth Type	(Tungsten Carbide inserts)
Circular Type	mud
Thread Connection	6 5/8 API REG
Wheel diameter protection (diameter retention)	Available
Shirttail Protection	Available
Operating parameters
RPM(r/min)	90-50
WOB(kn/mm)	0.45-1.1
Application Formation	Medium formations with high compressive strength, such as medium soft shale, hard gypsum, medium soft limestone, medium soft sandstone and soft formations with hard inclusions.

Technology

1.Seal and Lubrication: The bearing seal is adapting the high quality HNBR O-ring. The best seal compression and the radial seal structure can enhance the seal performance. The compensation system and the high quality bit grease can limit pressure differential, and greatly increase the lubricating reliability.

2.Six-point Gauge Stability: The design delivers near six-point contact with the borehole wall for unequalled bit stability that protects the cutting structure from damaging lateral blows
3.Motor hardfacing: Tungsten carbide particle hardfacing is applied liberally along the shirttail and extended up the leading edge of the bit leg for additional protection in high-speed, directional or abrasive applications

Structure and Working Principle

The main body consists of three cones, bearing system, leg, nozzles, seals, etc.

During operation:The cones revolve with the drill string and rotate on their own axes at the same time.

Rock breaking mechanism:Composite rock breaking by impact crushing + shear scraping + indentation fracturing.

Application

Soft to hard formations with several hard inter-bed,such as clay/chalk/ compressive mudstone/hard gysum/salt/shale/limestone/dolomite.etc

Popular models

Operating Parameters