H2S LPR N Valve Standard Downhole Tester Valve For Drill Stem Testing Valve
                                         
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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 ......                                         
                                        
                                            XI 'AN ZZ TOP OIL TOOLS CO.,LTD
                                         
                                        
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Pressure Operated tester valve (LPR-N Valve)
                                         
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                                            ... tester valve (LPR-N Valve) is a full- opening, annulus pressure-operated valve. It measures multiple closed-in pressures in cased holes where pipe manipulation is restricted and a full-opening string is required. The nitrogen chamber is ......                                         
                                        
                                            DST Oiltools Co., Ltd
                                         
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