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Your position now:Nera Petroleum Mechanical Manufacture Co., Ltd > The drilling tool > Kelly Cock Valve > Kelly cock Valve
Kelly cock Valve

Kelly cock Valve can be divided into the top kelly cock valve and the lower kelly cock, drilling fluid can flow freely without pressure through the kelly cock. It is used as a drill pipe safety valve or installed in the top of kelly pipe to prevent the fluid blowing out, kelly; or installed in the bottom of the kelly pipe, to prevent the loss of drilling fluid when the kelly is removed.

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