9 7/8’’(250.8mm) IADC637 hard rock drilling tci tricone drill oil and gad drrill bit

9 7/8’’(250.8mm) IADC637 hard rock drilling tci tricone drill oil and gad drrill bit

1.Select the appropriate type of drill bit based on formation lithological information, hydraulic and drilling parameters. 2.According to the hydraulic parameters to choose the corresponding nozzle, nozzle hole size grade difference should not be too large, so as not to erode the flow channel. 3.Before the drill bit is lowered into the well, 1) check that the size and type of the drill bit match the well diameter, 2) check that the nozzle is fitted, and 3) check that the specifications of the drill bit connecting wireline mating pattern and the joint match. 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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Insert tooth tricone drill bit

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Instructions for the use of drill bits

1.Select the appropriate type of drill bit based on formation lithological information, hydraulic and drilling parameters.
2.According to the hydraulic parameters to choose the corresponding nozzle, nozzle hole size grade difference should not be too large, so as not to erode the flow channel.
3.Before the drill bit is lowered into the well, 1) check that the size and type of the drill bit match the well diameter, 2) check that the nozzle is fitted, and 3) check that the specifications of the drill bit connecting wireline mating pattern and the joint match.
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.

Product specifications
Diameter	9 7/8’’(250.8mm)
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	80-40
WOB	0.5-1.2
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.

Introduction

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.

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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Operating Parameters