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節(jié)流管匯

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節(jié)流管匯

節(jié)流管匯是控制井涌、實施油氣井壓力控制技術的必要設備。在防噴器關閉條件下，利用節(jié)流閥的啟閉，控制一定的套管內壓力來維持井底壓力始終略大于地層壓力，避免地層流體進一步流入井內。此外在實施關井時，可用節(jié)流管匯泄壓以實現(xiàn)軟關井。

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節(jié)流管匯是液壓防噴器的配套裝置，控制井噴、油氣井壓力的主要設備，通過節(jié)流閥的節(jié)流作用實施壓井作業(yè)，替換出井里被污染的泥漿，同時控制井口套管壓力與立管壓力，恢復泥漿液柱對井底的壓力控制，制止溢流。通過節(jié)流閥的泄壓作用，降低井口壓力，實現(xiàn)“軟關井”，通過放噴閥的大量泄流作用，降低井口套管壓力，保護井口防噴器組。

- 節(jié)流管匯主要部件包括：節(jié)流閥、閘閥、管線、管子配件、壓力表等組成；

- 節(jié)流閥有三種：手動調節(jié)式、固定式及液動式；

- 閘閥有兩種：手動式或液動式；

- 可以配液控箱以實現(xiàn)遠程控制。

節(jié)流管匯是控制井涌、實施油氣井壓力控制技術的必要設備。在防噴器關閉條件下，利用節(jié)流閥的啟閉，控制一定的套管內壓力來維持井底壓力始終略大于地層壓力，避免地層流體進一步流入井內。此外在實施關井時，可用節(jié)流管匯泄壓以實現(xiàn)軟關井。當井內壓力升高到一定極限時，通過它來放噴以保護井口。

當井內壓力升高時，可通過節(jié)流管匯上的節(jié)流閥（有手動可調式、液動式和固定式三種）的開啟與關閉來釋放井內流體以控制套管內壓力。套管內壓力超過一定壓差時可通過閘閥直接放噴。

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