Cov hom ntawm cov cuab yeej downhole feem ntau siv nyob rau hauv offshore roj teb ua tiav thiab cov hlua ntau lawm muaj xws li: Packer, SSSV, Sliding Sleev, (Nipple), Sab Pocket Mandrel, Rooj Npias, Flow Coupling, Blast Joint, Test Valve, Drain Valve, Mandrel, Plug , thiab lwm yam. 1.Packers Lub packer yog ib qho ntawm th...
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