12 1/4''311mm IADC537G carbide insert tricone tci drill bit China manufacturer

The tricone bit comprises three rotating cones, bearing systems, legs, nozzles and seals as its key components. When working, the cones revolve with the drill string and rotate simultaneously. Rock is removed by a combined effect of impact crushing, shear scraping and indentation fracturing. 4.The drill bit should be lowered in accordance with the prescribed operating procedures for lowering the well, and after the drill bit has made contact with the bottom of the well, please make sure to press gently and turn slowly (drilling pressure 5-15kN, speed 60r/min). After 30 minutes, the drilling pressure can be gradually increased to normal.

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tricone bit tci bit tci drill bit tricone drill bit

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Details

Introduction

TCI Tricone bit is an important tool for oil drilling. When the cone bit is working, the cutting teeth alternately contact the bottom of the well, the rock breaking torque is small, the contact area between the cutting teeth and the bottom of the well is small, the specific pressure is high, and it is easy to eat into the formation; the total length of the working edge is large, so the wear is relatively reduced. The roller cone bit can accommodate a variety of formations from soft to hard.

Tricone bits’ design enables them to efficiently drill various geological formations. Each cone on the bit has teeth or inserts made from very hard materials like tungsten carbide which are custom-designed to resist the abrasive nature of rocks being drilled. The shape and fabrication method of these teeth or inserts vary depending on the kind of rock formation being drilled into

Features

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	120-50
WOB	0.45-1.0
Application Formation	Soft to medium formations with low compressive strength, such as medium, soft shale, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds, etc.

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.

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

Application

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

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