发明名称 |
APPARATUS FOR PASSIVE REMOVAL OF SUBSURFACE CONTAMINANTS |
摘要 |
An apparatus (10) is provided which passively removes contaminated gases for m a subsurface (16). The apparatus (10) includes a riser pipe (12) extending into a subsurface (16) which has an exterior end in fluid communication with a valve (32). When well pressure is greater than atmospheric pressure, the val ve (32) opens to release contaminants into the atmosphere, and when well pressu re is less than atmospheric pressure, the valve (32) closes to prevent flow of air into the well (18). The valve assembly of the invention comprises a lightweight ball (42) which is lifted from its valve seat (40) with a slight pressure drop between the well (18) and the atmosphere.
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申请公布号 |
CA2221770(C) |
申请公布日期 |
2002.04.02 |
申请号 |
CA19962221770 |
申请日期 |
1996.05.22 |
申请人 |
WESTINGHOUSE SAVANNAH RIVER COMPANY |
发明人 |
PEMBERTON, BRADLEY;ROSSABI, JOSEPH;MAY, CHRISTOPHER;RIHA, BRIAN |
分类号 |
B09C1/00;B09C1/10;E21B34/02;E21B34/16;E21B43/12;E21B43/34;(IPC1-7):B09B1/00 |
主分类号 |
B09C1/00 |
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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