Ball-dropping sliding sleeve with a removable ball seat
作者： Li Fuqiang , Zhang Shengpeng , Wang Feiyue , Li Xiaojun , Gao Fei
DOI:
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摘要: A ball-dropping sliding sleeve with a removable ball seat, comprising an outer barrel (1), inner (6) and seat assembly; ring downward facing shoulder (2) is disposed at upper end of the lower joint (3) fixedly mounted in groove (4) formed (1) between (3), least one fracturing lateral hole (5) distributed on circumference side (4). The structure present invention reasonable compact, its usage convenient. Through coiled tubing, connecting (10), (7) (15) which are located inside can be lifted up taken out, widens channel sleeve, eliminates restriction diameter (15), facilitates post-processing complex situations; pressure relieving by holes circular (17) relieve facilitating lifting.
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