| 发明名称 |
Abandonment of a branch main |
| 摘要 |
A method for abandoning a branch main 1 joined to a fluid-carrying spine main 2 comprises gaining access to the bore of the branch main 1 at an access point and then permanently blocking the bore of the branch main 1 at a blockage point closer to the junction then to the access point.
|
| 申请公布号 |
US5327924(A) |
申请公布日期 |
1994.07.12 |
| 申请号 |
US19930086458 |
申请日期 |
1993.07.06 |
| 申请人 |
BRITISH GAS PLC |
发明人 |
ELGAR, ANTHONY D.;SALES, BRIAN T.;PARKES, ADRIAN S. |
| 分类号 |
E03B7/02;E03F3/04;F16L1/024;F16L55/10;F16L55/128;F16L55/16;(IPC1-7):F16L55/10 |
主分类号 |
E03B7/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
