MECHANICAL DRILLING JAR General overviewModel QJZ Mechanical Drilling Jar is a kind of mechanical drilling jar for downhole stuck freeing. It integrates the up jar and down jar and can free the dragged and stuck accident during the drilling operation. It is an ideal tool for directional well and deep well drilling.Compared with hydraulic or hydro-mechanical drilling jar, the “QJZ” mechanical ...
... Industrial and Commercial Bank of China (ICBC), China Construction Bank (CCB), Bank of China (BOC) and Agricultural Bank of China, respectively ...
... .418114821322.2247.64525V74.7136119.442.993.7325102.418114821326.252.44535V101.6148.3133.342.993.7353102.418114821330.1558.7■ V Series-cartridge ...
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