1.The water circulation, Elastomer & metal-face sealed roller bearing tricone bit. High precision bearing with two thrust faces. Ball lock the cone. Hard faced head bearing surface. Cone bearing inlaid with friction-reducing alloy and then silver-plated. 2.SY/T5217-2000 and API Spec7-1 standard and ISO 9001:2008 SYSTEM; 3.Multiple gauge protection with gauge trimmers on the heel of cone, tungsten carbide inserts and hard facing on the shirttail extend gauge holding capability and bearing life
4.Used for a variety of applicable formations for water well and oilfield
5.The size range from 3" 7/8 to 22".
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