摘要:针对井下作业中RTTS封隔器一次封隔器不坐封、两次验封不合格问题,进行了封隔器受力、下管速度和套管壁不清洁对封隔器的影响分析,认为下管速度过快产生的水击压力,引起水力锚牙与套管摩擦损坏,套管壁水垢太厚,都会影响水力锚的锚定力,造成封隔器上移而影响密封。以现场应用为例,提出应对措施:油管丝扣要密封,严格控制下工具速度,坐封井段套管要清洁干净,适当增加注水井封隔器的坐封负荷。
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