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Standard casing head

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Standard casing head


The casing head is one of the core components of the wellhead equipment in drilling, mainly used to secure the wellhead structure and perform multiple functions. As a key hub connecting the downhole casing string with surface equipment, it not only supports the weight of all casing strings except the surface casing but also seals the annular space of the casing to prevent pressure cross-flow, ensuring well control safety. During the drilling phase, the casing head provides the installation base for the blowout preventer, and during the oil production period, it transitions to connect the tubing head and Christmas tree. Additionally, its side outlet function supports cement squeeze, pressure balancing, and emergency fluid injection, significantly enhancing cementing quality and operational flexibility.

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