发明名称 |
Casing joint assembly for producing an annulus gas cap |
摘要 |
A casing joint assembly and methods for producing an annulus gas cap using the casing joint assembly. The casing joint assembly comprises a first valve and a second valve to control fluid pressure in the sealed annulus between the casing string and a wall of the well bore or another casing string. |
申请公布号 |
GB2532889(A) |
申请公布日期 |
2016.06.01 |
申请号 |
GB20160000639 |
申请日期 |
2013.08.08 |
申请人 |
Landmark Graphics Corporation |
发明人 |
Robert F Mitchell |
分类号 |
E21B34/06;E21B17/08;E21B34/10;E21B41/00;E21B43/10 |
主分类号 |
E21B34/06 |
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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