Tricone Bits Cutting SstructureThe wear-resistance of teeth is enhanced with premium tungsten carbide hardfacing on the tooth suifaces for steel tooth bit.The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit.Tricone Bits Gauge StructureMultiple aguge protection with gauge trimmers on the heel and gauge inserts on the gauge surface of the cone ,tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life.Tricone Bits Bearing StructureHigh precision roller bearing with two thrust faces .Balls lock the cone .The leg bearing can get larger by arranging the rollers in groove of the cone hole,so it can receive more WOB,and suitable for high RPM.Thrust faces hardfaced with wear resistant alloy.Abrasion resistance and seizure resistance of the bearing are improved.Seal and Lubrication Premium HNBR O-ring,optimal seal compression and curved seal structure can enhance seal performance.the pressure compensator system and advanced grease can greatly increase the lubricating reliability.Tricone Bits ApplicationIt can receive higher WOB and faster rotary speed than conventional roller bearing bits .It is suitable for high RPM applications.Recommended Drilling Parameters IADCWOB(kN/mm)(bit dia) RPM(r/min) Applicable Formations 115 0.3--0.75 200--80 Very soft formations with low compressive strength and high drillability,such as clay,mudstone,chalk ,etc. 125 0.3--0.85 200--80 Soft formations with low compressive strength and high drillability,such as mudstone,gypsum ,salt,soft shale,soft limestone,etc. 135 0.3--0.95 180--80 Soft to medium soft formations with low compressive strength and high drillability.such as medium soft shale,hard gypsum,medium soft limestone,medium soft sandstone,soft formation with harder interbeds,etc. 215 0.35--0.75 180--80 Medium formations with high compressive strength ,such as medium soft shale,hard gypsum,medium softlimestone,medium soft sandstone,soft formation with harder interbeds ,etc. Note:The upper limits of WOB and RPM in above table should not be used simultancously.Crystal Web:http://www.bjleeding.com/tel: 86-01057290815mobilephone: 86-13269002360skype: bjleeding02QQ: 973987086Email:leedingj@163.com leedinglj@gmail.com
