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Size from 3 7/8" to 26" Covers almost all IADC code. Good quality and after-sale service Meet with API Spec7-1 &ISO 9001: 2008 1>Cutting Structure The wear-resistance of teeth is enhanced with premium tungsten carbide hardfacing on the tooth surfaces for steel tooth bit. 2>Gauge Structure Multiple gauge 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. 3>Bearing Structure High precision roller bearing with two thrust faces. Ball lock the cone. Thrust faces hardface with wear resistant alloy. Abrasion resistance and seizure resistance of the bearing are improved. 4>Seal and Lubrication Premium O-ring, Optimal seal compression and curved seal structure can enhance the seal performance. The pressure compensator system and advanced grease can greatly increase the lubricating reliability. 5>Product Application It is suitable for various formations, and achieves high RPM under low to medium WOB application.Size 17 1/2” (444.5mm) IADC 114 Bearing Type Elastomersealed journal bearing Thread Connection 7 5/8 reg pin WOB(KN/mm) 0.3~0.75 RPM(r/min) 180~60 Applicable Formations Very soft formations with low compressive strength and high drillability, such as clay, mudstone, chalk, etc. Circulation system Mud pump Available sizes: 60mm, 65mm, 76mm, 93mm, 95mm, 98mm (3 7/8” ), 101.6mm, 114mm, 118mm, 120mm, 127mm(5” )130.1mm(5 1/8” ), 133.3mm (5 1/4” ), 139.7mm(5 1/2” ), 142.8mm (5 5/8” ), 149.2mm (5 7/8” )152.4mm (6” ), 155.5mm(6 1/8” ), 158.7mm(6 1/4” ), 161.9mm(6 3/8” ), 165.1mm (6 1/2” )190.5mm (7 1/2” ), 193.6mm (7 5/8” ), 200.0mm (7 7/8” )212.7mm(8 3/8” ), 215.9mm (8 1/2” ), 222.2mm(8 3/4” )241.3(9 1/2” ), 244.4(9 5/8” ), 250.8(9 7/8” )269.8(10 5/8” ), 295.3(11 5/8” )311.1(12 1/4” ), 346.0 (13 5/8” ), 349.2(13 3/4” )374.6(14 3/4” )381(15” ), 393.7(15 1/2” ), 406.4(16” )444.5(17 1/2” ), 508(20” ), 558(22” ), 609.6(24” )660.4(26” ) Available models: Steel tooth(IADC code) 111, 121, 131117, 124, 126, 127, 136, 137211, 311216, 217, 227 TCI(IADC code) 415, 435, 417, 437515, 525, 535, 545, 517, 527, 537, 547615, 625, 635, , 617, 627, 637, 737512, 522, 532, 612, 622, 632, 732
