Oil Drill Collar Thread Repair theory

Oil drill collar for oil wells drilled in the lowest part of the drill string , through the drill pipe and drill bit with taper thread connections . Because of poor working conditions , and therefore the higher the frequency of wear , requiring constant maintenance updates to ensure the normal operation of the drilling platform . For the repair of damaged threads , generally in the thread on the basis of the original processing , to meet the operational needs of the screw thread . Thread Repair can increase oil exploration, mining industry equipment using drill pipe drill collar reuse , extend the actual life of the drill collar , while also serving as resource-saving effect. Lathe repair thread inefficient and relatively low Hydraulic pipe fittings  machining , CNC lathe threading principles and drill collar thread repair works have a certain distinction, affect production and processing efficiency and accuracy of thread . Subject to kinematic principles and screw machine repair theory as key research content. Analysis lathe mechanical structure and the use of ordinary lathe thread feed motion laws, and the use of space geometry approach to sport this movement will function formulas describe the way . Depth analysis of two different processing methods for turning threaded feed , and how to ensure that the movement of thread processing relationship to the correct processing of the tooth type thread . The method describes the use of spatial geometry processing and CNC lathes Thread Thread Repair motion function .