发明名称 |
PLUNGER LIFT SYSTEM |
摘要 |
<p>An intermittent lift plunger includes at least one seal mandrel, a bottom sub and an upper valve assembly. The valve assembly is closed by a well bottom stop which inserts into the lift plunger and opened by a lubricator stop at the top of the well. The seal mandrel includes a sleeve seal formed from an elastomeric rubber or plastic, which inflates to engage the well bore surface when the valve is closed and a pressure differential exists.</p> |
申请公布号 |
CA2583041(C) |
申请公布日期 |
2015.04.14 |
申请号 |
CA20072583041 |
申请日期 |
2007.03.23 |
申请人 |
STELLARTON TECHNOLOGIES INC. |
发明人 |
AMIES, RYAN;GEORGE, GRANT;JAMES, JORDAN;STEELE, GEOFF |
分类号 |
F04B47/12;E21B34/06;E21B43/12 |
主分类号 |
F04B47/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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