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LPR N Valve Standard Downhole Tester Valve For Drill Stem Testing Valve
The LPR N Tester Valve is a standard tester valve in drill stem testing service. The N valve is a full-opening, annulus pressure-operated valve. The full bore design of tester valve permits measuring multiple closed-in pressures in cased holes where pipe manipulation is restricted and a full-opening string is required.
The nitrogen chamber of LPR N Valve is charged at the surface to a selected pressure determined by surface temperature and bottomhole temperature and pressure. If the intended test requires a permanent packer that uses a stinger mandrel or seal nipple, a variety of Halliburton bypass tools are available, depending on field application, to help ensure that the formations and downhole equipment are protected from excessive pressure build up.
Technical parameter of LPR N Valve
| size/in | Working pressure /Mpa | Service environment | Working temperature | Connection |
| 3 7/8” | 105 | Mud, Crude Oil, Natural gas with H2S and acid | --29oC ~+204oC | EUE IF CAS |
| 5” | ||||
