• Drill Pipe Dart Test Sub


    The system consists of a drill-pipe dart, a test sub, and an additional safety mechanism. By pumping the drill-pipe dart, the exact volume of the drill-pipe string is determined and the ID of the drillstring is confirmed. After reaching the test sub, it is possible to perform a pressure test with previously specified opening pressure. After reaching the opening pressure and shearing the inner sleeve (pressure drop), work can be continued. A burst disc sub is used in addition to the drill-pipe dart test sub and activated with pressure if required.


    • Determines exact drill-pipe string volume
    • Drift the drill-pipe string
    • Pressure test drill-pipe string
    • Available for all drill-pipe sizes
    • One-size string or combined string