发明名称 |
VALVE SEAT |
摘要 |
<p>A ball valve seat (10) is disclosed which provides a temporary seal for a plug (40). The valve seat comprises a substantially cylindrical body (30) of a first volume, which defines a seating surface (34). A pressure differential is developed across the valve seat when the plug sealingly engages the seating surface. The body is formed of an elastic material which compresses from a first volume to a smaller second volume by application of a force on the plug, to provide a clearance which is greater than a plugging dimension of the plug, thus allowing passage of the plug downstream. After passage of the plug, the body returns to the first volume.</p> |
申请公布号 |
WO2005106186(A1) |
申请公布日期 |
2005.11.10 |
申请号 |
WO2005GB01662 |
申请日期 |
2005.04.29 |
申请人 |
SPECIALISED PETROLEUM SERVICES GROUP LIMITED;TELFER, GEORGE;SCOTT, EDWARD, DOCHERTY |
发明人 |
TELFER, GEORGE;SCOTT, EDWARD, DOCHERTY |
分类号 |
E21B34/00;E21B23/08;E21B34/14;(IPC1-7):E21B23/08 |
主分类号 |
E21B34/00 |
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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