Introduction
Steel tooth structure effectively improving the wearing resistance of the teeth and greatly increasing the rate of penetration.
Features
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.
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.
Nozzle：These nozzles are much sturdier and provide greater flow capacity and maximize fluid distribution to the cones.
Technology
1.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
2.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.
IADC CODE
Bit Type |
IADC | Recommend parameter |
Apply formation | |
Pulldown (kN/mm) | Rotation speed (r/min) | |||
Rubber sealed | 117 | 0.35~0.90 150~80 | Extremely soft formations with low compressive strength and high drillability, such as soft shale, clay, salt rock, etc. | |
127 | 0.35~1.00 150~70 | Low compressive strength, high drillability soft formation, such as shale clay, salt rock, soft limestone,etc | ||
417 | 0.35~0.90 140~70 | Extremely soft formations with low compressive strength and high drillablity, such as shale, clay, sandstone, conglomerate, etc | ||
437 | 0.35~0.95 140~60 | Extremely soft formations with low compressive strength and high drillability, such as shale, clay, sandstone, conglomerate, etc | ||
447 | 0.35~1.00 140~60 | Soft formations with low compressive strength and high drillability, such as shale, clay, salt rock, sandstone, soft limestone, gypsum, etc. | ||
517 | 0.35~1.05 120~50 | Soft formations with low compressive strength and high drillability, such as shale, clay, sandstone, soft limestone, etc. | ||
527 | 0.35~1.05 120~50 | Soft formations of compressive strength, such as shale, clay, sandstone, soft limestone, salt rock, anhydrite, etc. | ||
537 547 | 0.35~1.05 110~40 | Compressive strength, medium soft, with hard abrasive interlayer, such as hard shale, anhydrite, soft limestone, sandstone, etc | ||
617 627 | 0.35~1.05 80~40 | High compressive strength, medium to hard, with thick hard intercalations such as hard shale, limestone, dolomite, sandstone, etc | ||
637
| 0.70~1.20 70~40 | High compressive strength, high abrasive and medium hard formations such as limestone, dolomite, sandstone,flint,etc | ||
Journal bearing.Hardfaced head bearing surface.inner hole of cone is silver-plated.The load capacity and seizure resistance of the bearing is greatly improved.0 ring seal is made of the more wear resistance high saturated buna-N with the increased seal section and precisely designed sealing flflange in the cone sealing area increased the reliability of the seal.
HC Series Composite Sealed Bearing Bits
The series bits are sealed with composite rubber of sliding bearing,which can bear higher bit pressure and higher rotation speed,the service life of the bearings can be prolonged.
The bearing composite rubber seal ring, more suitable for the working environment and operating parameters of tricone bits.
The bit is made of cemented carbide inserts with high strength and wear resistance ,the inserts strength and wear resistance improved.
HM Series Metal Sealed Bearing Bits
Metal sealed with journal bearing. Hardfaced head bearing surface,inner hole of cone is silver-plated. The load capacity and sei-zure resistance of the bearing is greatly improved. High wear re-sistance and excellent cutting ability of the insert bit are given full play by using carbide compact of high strength and high toughness in combination with optimized compact numbers and rows,the exposure height and special shaped compacts
Mining Tricone Drill Bits
HENGJI BIT ,mining tricone drill bit is mainly used in large open-pit mining operations,such as open-pit coal mines,copper Mines,iron ore mines,molybdenum mines and other non-ferrous metal mined.The bits are used on rotary drills, with a proven reputation of high performance and low cost.
Mining tricone dril bit consists of a bearing structure,cutting structure,shirttal and lug enhancement structures,flow channel system and a thread connection.
The bearing structure consists of lug bearing,cone bearing,seal beaing,main rollers,minor rollers ,locking bearing balls,axle thruse plate, and recess thrust plate,they are categorised into air