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Simple casing head

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Simple casing head


The casing head is an important connector between the casing and the wellhead device. It is used for connections between casing strings, between the casing and the blowout preventer, and for support and connection between the wellhead and the oil (gas) well after completion. Its lower end is connected to the surface casing by threads, and the upper end is connected to the wellhead device or blowout preventer by flange or clamp. It supports the weight of subsequent casing strings through the hanger, bears the weight of the blowout preventer, forms a pressure seal between the inner and outer casings, provides an outlet for releasing pressure between casing strings, and allows for special operations related to drilling and production processes.

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