Wellhead casing reinforcing device

The utility model belongs to the field of oil-gas field development, and particularly relates to a wellhead casing reinforcing device. A wellhead casing reinforcing device comprises an oil-string casing, a surface casing is arranged on the outer side of the lower end of the oil-string casing, and an...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ZHANG WENZHE, WANG TAO, ZHAO YI, MA ZHENFENG, LI WEIFENG, YANG QUANZHI, HOU YUNYI, CHI LIBIN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The utility model belongs to the field of oil-gas field development, and particularly relates to a wellhead casing reinforcing device. A wellhead casing reinforcing device comprises an oil-string casing, a surface casing is arranged on the outer side of the lower end of the oil-string casing, and an annulus is formed between the lower end of the oil-string casing and the surface casing; an upper fixing device is arranged at the upper end of the oil-string casing, and a lower fixing device is arranged between the lower end of the oil-string casing and the surface casing; the upper fixing device comprises a slip and an upper pressing disc which are sequentially connected to the upper end of the oil-string casing in a sleeved mode, the upper pressing disc is in a disc shape, and the upper end of the oil-string casing is matched with the slip, the slip and the upper pressing disc. The lower fixing device comprises a lower pressure plate, the top end of the lower pressure plate is connected with the upper pressure