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secondary well control technology
释义
secondary well control technology
Encyclopedia
工学
二级井控技术
释
secondary well control technology
二级井控技术
当一级井控失效后,井内的液柱压力小于地层压力,井底处于欠平衡状态,此时采取关井,控制节流阀的开度等措施实现节流循环,在井口造成一定的回压,利用该回压与井内剩余液柱压力之和平衡地层压力,抑制地层流体向井内的侵入,同时将井内的地层流体排出、重浆压井,从而重建井眼与地层之间平衡关系,恢复正常钻井作业的井控技术。
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