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15000psi Drill Stem Test ToolsHydraulic Jar Big John Jar For Cased Hole Drill Stem Testing 5" x 15000psi Introudction of Hydraulic Jar The hydraulic jar is the Halliburton Big John Jar, which is used as a safety tool in the well downhole ... Read More
2021-09-01 13:06:35
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