The multi-level circulation header is a connector that provides multiple water eye and annulus circulation on/off switching by dropping balls into the wellhead. Each ball drop can produce a clear on/off position. This product is suitable for large displacement wells and horizontal wells, and is usually used for well washing or leak plugging operations during drilling.
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A special bypass valve is a tool that provides circulation matching through pressure difference. It is an ideal tool for use in highly inclined and horizontal wells.
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Incremental circulation valve (bypass valve)
An incremental bypass valve is a drilling tool bypass valve. Before drilling into the oil and gas reservoir, the drilling tool bypass valve is connected to the outside of the drill string near the drill bit. When the drill bit water eye is blocked during well control operations, the bypass valve can establish a new circulation channel to continue the well control operation.
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