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(Total 2 Products for Pipe Drill Phosphating Surface)
Hexagonal Drilling Kelly for Drill String
Square Drilling Kelly Product Features Square Kelly, as the driven part of drill string, locates in the top of it to transmit torque and bear the suspended weight. According to API Spec7-1 Specification, the material quality is 4145H that`s after heat treament, thread hardening treatment and phosphating to better...
Center Through Cable Drilling Pipe
Center Through Cable Drilling Pipes - Φ73×7 Product Features Center through cable drilling pipes is mainly used in underground tunnel directional drilling and geological controlled directional drilling. It plays important role in underground coal seam measurement and mine gas extraction. Center through cable drilling...
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