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The Top Drive Valves or IBOPs can be separated into Upper IBOPs and Lower IBOPs. The upper IBOP is positioned between the power swivel and the top drive main shaft. The lower IBOP is positioned between the top drive main shaft and a crossover sub. They are used to shut off flow in the drill sting and to prevent mud loss during tripping operations. Due to the efficiency and potential savings that Top Drive or Power Swivel rigs offer, their usage has consistently increased throughout the last two decades.
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Upper Top Drive Valve Model
Lower Top Drive Valve Model
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