套管悬挂器可确保套管柱被正确地放置，它一般包括一个密封装置，以便将套管环形空间与上部的井口部件隔离。
The casing hanger provides a means of ensuring that the string is correctly located and generally incorporates a sealing device or system to isolate the casing annulus from upper wellhead components.
油管四通和油管悬挂器分两种密封结构形式，一种是直 座式橡胶密封，一种是 锥 座式金属硬密封，可根据不同需要确定其选用形式。
The seals of tubing spool and tubing hanger are classified as two types:vertical rubber seal and tapper metal seal. Users can select one of them upon their requirement.
最简单最基础的应用就是在无需密封的时候，作为悬挂器使用；
The simplest and most basic application is as a Gauge Hanger where no sealing mechanism is required;
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