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发明授权
CN104395552B 井下设备 有权 转让

井下设备
摘要：
一种井下设备，包括：管状主体(34a，b)；在主体(34a)的壁内的第一端口和第二端口(36，38)；以及流体压力响应阀装置，该流体压力响应阀装置具有：与第一压力相关联的锁定的第一配置，其中第一端口(36)被打开而第二端口(38)被关闭；与高于第一压力的第二压力相关联的解锁的第二配置，其中第一端口(36)被打开而第二端口(38)被关闭；以及与低于第二压力的第三压力相关联的第三配置，其中第二端口(38)被打开并且第一端口(36)被关闭。
摘要（英）：

A downhole apparatus including a tubular body, first and second ports in a wall of the body, and a fluid pressure-responsive valve arrangement having a locked first configuration associated with a first pressure in which the first port is open and the second port is closed, an unlocked second configuration associated with a second pressure higher than the first pressure in which the first port is open and the second port is closed, and a third configuration associated with a third pressure lower than the second pressure in which the second port is open and the first port is closed.

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