发明名称 |
PERFORATING GUN FOR UNDERBALANCED PERFORATING |
摘要 |
A perforating gun has shaped charges that can generate a high-pressure gas. A valve sub connects to the perforating gun and a reservoir sub connects to the valve sub. The valve sub has an enclosure with a port. A mandrel in the enclosure has a piston head and a fluid path extending at least partially through the mandrel. A sleeve is slidably mounted on the mandrel and selectively blocks fluid flow through the port. A pressure chamber in the sleeve receives the generated high-pressure gas via the fluid path. The sleeve slides toward the perforating gun after a predetermined pressure is created by the generated high-pressure gas in the pressure chamber. The reservoir sub may have at least one chamber in fluid communication with the interior of the valve sub. |
申请公布号 |
CA2896228(A1) |
申请公布日期 |
2016.12.29 |
申请号 |
CA20152896228 |
申请日期 |
2015.07.09 |
申请人 |
OWEN OIL TOOLS LP |
发明人 |
LAGRANGE, TIMOTHY E.;GARTZ, JEFFREY |
分类号 |
E21B43/117;E21B34/14 |
主分类号 |
E21B43/117 |
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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