| 摘要 |
<p>A gravel-packed pipeline is formed by inserting a liner pipe (22) having a porous pipe (16) contained therein. A conveyor pipe (30) is attached to the liner pipe for conveying filtering material (18) such as gravel. After positioning the liner pipe, the end of the porous pipe is pushed out and anchored (28). The liner is removed while the filtering material is conveyed to the hole (20).</p> |
