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Browsing by Subject "weld flash"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Wpływ wewnętrznego rąbka zwornika przewodu na przepływ płynów wiertniczych
    (2007) Bednarz, Stanisław; Knez, Dariusz
    Drill pipes called drill rods as an essential part of the drill string are used in horizontal directional drilling. The application of frictional welding is the most common method in plain pipes and tool joints connection. The outside and inside surfaces flash at the ends of parts joined arises after this operation as a result of high contact force, simultaneous rotation of tool joint and high temperature in accordance with the materials melting. The outside surface flash is removed by cutting method, however big problems are encountered during removal of the flash inside of the pipe. The paper concerns the influence of the internal flash on the drilling fluid flow during making the hole. The ununiform flash shape creates difficulties in the analytical description of this phenomenon. According to this, computer simulation appears to be a very effective tool for solving this problem. Friction losses and velocity vectors field in the flash zone are evaluated on numerical calculations basis.