Invention Grant
US08499842B2 Dual barrier plug system for a wellhead 有权
井口双屏障塞系统

Dual barrier plug system for a wellhead
Abstract:
A dual barrier plug system includes a frac spool, having a dual barrier plug disposed within the interior of the frac spool; a valve selector member disposed within the interior of the dual barrier plug; and the plurality of seals are used to seal fluid flow from below the frac spool, and the seals provide two barriers to each fluid flow.
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