Method and apparatus for refurbishing deficient pipes
US4830538A · kind A · utility
5Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1988 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Mar 16, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/1657
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A refurbishing method for an existing pipeline under the sea or on the ground by inserting a rigid inner pipe having its front end temporarily blocked includes (a) driving the rigid pipe by increasing the volume of the fluid filled and sealed in the new pipe, (b) driving the new pipe by an axial force with the aid of a holder at the rear rim of the new pipe, and (c) regulating the movement of the new pipe. An apparatus to carry out the above-mentioned method is also provided. After inserting one pipe, all defines of the apparatus are detached, then another new pipe is connected, and repeated insertions end up as complete pipeline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.