Applying pump pressure then activates a sliding collar that opens access ports, enabling circulation across the upper casing interval.
然后施加泵压，使滑动箍启动，于是使进入口开启，从而能够穿过套管上段进行循环。
Applying pump pressure then activates a sliding collar that opens access ports, enabling circulation across the upper casing interval.
然后施加泵压，使滑动箍启动，于是使进入口开启，从而能够穿过套管上段进行循环。
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