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                當前位置:首頁 > 免費電話 > 常見問答
                雙作用抽油泵的概述
                來源:www.yvettesblogs.com? 發布時間:2015-05-20 08:56?? 瀏覽次數:
                【問】雙作用抽油泵的概述
                【答】1、工作原理:
                上沖程時下部固定閥打開。與此同時,上腔室體積減小,壓力增大,上固定閥關閉,下游動閥關閉,上腔室的油流啟開上游動閥,通過上柱塞排出地面。
                下沖程時下固定閥關閉,下游動閥打開,上游動閥關閉,原油通過下柱塞、上柱塞、進入油管。與此同時,上腔室體積增大,壓力降低,上固定閥打開,原油從油管與套管的環形空間進入汲油。
                2、結構特點:
                ⑴一個往復沖程可完成兩次汲油和排油的過程,比泵徑和工作參數完全相同的抽油泵提高了產液量。
                ⑵因為下沖程時桿柱下行阻力較大,不宜在原油粘度過大而出砂嚴重的油井中使用,且抽油桿柱易斷脫。
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