发明名称 |
Pressure coring apparatus and method of obtaining a core using said apparatus |
摘要 |
A pressure coring apparatus comprises a housing having an upper end and a lower end. A valve is coupled to the lower end of the housing and has an open position for entrance of a core and a closed position for retaining and sealing the core within the housing. A piston assembly is moveably disposed within the housing. A first volume is defined within the housing and between the upper end of the housing and the piston assembly. A second volume is defined within the housing between the lower end of the housing and the piston assembly. A pressure relief device is disposed through the housing and operable to maintain pressure within the first volume and the second volume below a target pressure. |
申请公布号 |
GB2516337(B) |
申请公布日期 |
2015.08.05 |
申请号 |
GB20140006743 |
申请日期 |
2014.04.15 |
申请人 |
NATIONAL OILWELL VARCO, L.P. |
发明人 |
BOBBY T WILSON;DAVID Y MCGEHEE |
分类号 |
E21B25/08;E21B10/02;E21B49/06 |
主分类号 |
E21B25/08 |
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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