油矿地质（4-2） ... 井口压力 Well head pressure 套管压力 Casing pressure，Casing head pressure 油管压力 Tubing pressure，Tubing head pressure ...
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观测项目有水位、采液量、采气量及套管压力等。
Observed items are groundwater level, oil recovery volume, casing pressure and gas recovery volume.
释放单向阀用于释放管柱内的压力使装置顺利从套管中提出。
The releasing one-way valve is used to release the pressure from the casing string and pick up the device properly.
找到了套管周围压力的变化与其变形的规律。
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