发明名称 |
DOUBLE BLOCK AND BLEED PLUG |
摘要 |
A pipe plug includes two or more pivotally connected plugging heads that work in combination to double block and bleed a pipe. At least one of the plugging heads has an expandable sealing element that is in communication with an inflation source. The sealing element may be an inflatable sealing element or a compression packer sealing element. A passageway—sections of which may pass through the pivotal connection and into the plugging head—carries the inflation medium from the source to the sealing element. A bleed port passageway is also provided that passes through the plugging head. The leading plugging head may include a cleaning element for sweeping away debris ahead of the plug. The plugging heads may also include a skid plate that slideably engages the interior surface of the pipe to properly orient the plugging heads within the pipe. |
申请公布号 |
EP2350515(B1) |
申请公布日期 |
2017.03.15 |
申请号 |
EP20090822347 |
申请日期 |
2009.03.25 |
申请人 |
TDW DELAWARE, INC. |
发明人 |
YEAZEL, Kenneth, L.;PUCKETT, Gregory, L.;GOSWICK, Richard, L. |
分类号 |
F16L55/124;F16L55/128;F16L55/132;F16L55/134 |
主分类号 |
F16L55/124 |
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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