发明名称 |
Staging tool seal arrangement for gas wells |
摘要 |
A staging tool arrangement for gas well production assistance, comprising an elongated staging tool having an elongated upper portion and an elongated lower portion. The upper portion has a sliding relationship with the lower portion thereof. A displaceable annular seal is arranged about the lower portion. A displaceable enclosure is arranged on the elongated lower portion so as to slidably expose and to slidably enclose the annular seal. |
申请公布号 |
US8201629(B2) |
申请公布日期 |
2012.06.19 |
申请号 |
US20090586736 |
申请日期 |
2009.09.25 |
申请人 |
GREEN DAVID A.;WELL MASTER CORP. |
发明人 |
GREEN DAVID A. |
分类号 |
E21B31/18;E21B23/00;E21B43/12 |
主分类号 |
E21B31/18 |
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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