发明授权
- 专利标题： Lining of pipelines using a continuous tubular pull-through plastic liner
- 专利标题（中）： 使用连续管状拉通塑料衬管衬里管道
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申请号： US708264申请日： 1991-05-28
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公开(公告)号： US5135698A公开(公告)日： 1992-08-04
- 发明人: Mamdouh M. Salama , Louis H. Wolfe , Thomas L. L. Pugh
- 申请人： Mamdouh M. Salama , Louis H. Wolfe , Thomas L. L. Pugh
- 申请人地址： OK Ponca City
- 专利权人： Conoco Inc.
- 当前专利权人： Conoco Inc.
- 当前专利权人地址： OK Ponca City
- 主分类号： B29C63/46
- IPC分类号： B29C63/46 ; E21B29/10 ; F16L55/165
摘要：
A tubular plastic liner having a coefficient of thermal expansion greater than the coefficient of thermal expansion of a pipeline is cooled to reduce its outside diameter below the inside diameter of the pipeline, which is also cooled, and is then pulled into the pipeline. After the pulling operation is completed the liner and pipeline are allowed to return to normal temperature, whereupon the liner expands to conform to the inside diameter of the pipeline.
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