Main structure features:
1. Floating bearing structure. The floatingelements are made of new materials with high strength, high elasticity, high wear resistance and can endure high temperature, and bearing surface is treated with solid lubricant. This decreases the relative linear velocity of the bearing couple and reduces the temperature of the friction surfaces, which results in improved reliability and working life of the bearing under large WOB and high RPM conditions.
2. The O-ring seal is made of high-saturated buna-N with good wear resistance and which can endure high temperature. The increased seal section reduces unit pressure on the seal, and finely designed sealing flange increases reliability of the seal.
3. Ball locked cone, suitable for high rotary speed.
4. All-rubber compensator is used to limit pressure differential and prevent drilling fluid from entering the lubrication system and this provides the bearing system with good assurance of lubrication.
5. New type of wear resistant grease that can sustain high temperature up to 250 degree is utilized.
6. High wear resistance and excellent cutting ability of the insert bit are given by using carbide compacts with high strength and high toughness in combination with optimized number of compacts and rows, compact exposure height and special shaped compacts. For steel tooth bit, the tooth surface is hardfaced with new type of wear resistant material and thus working life of the cutting structure is extended while high ROP is also maintained.
Product predominance: FA series tri-cone bits are O-ring sealed floating bearing products. This series of bits are suitable for high RPM and high WOB drilling applications and they can be used to drill formations from very soft to very hard by selecting proper cutting structures.
Available sizes and types of FA series tri-cone bits: FAT127, FA437, FA447G, FA5117G, FA537G, FAT617G, FAT637G, FAT737G, etc.
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