Deep water repair methods and apparatus
US4155669A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1978 |
| Grant date | May 22, 1979 |
| Priority date | — |
| Expiry date | Feb 24, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63C11/40
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to methods and apparatus for effecting deep water repair of pipelines especially during a pipelaying operation. A damaged portion of the pipeline is located and is prepared for receiving a pipeline plug member by cutting away the damaged portion leaving a prepared pipeline end section. The pipeline plug member is secured in a submersible repair frame which is lowered from a floating vessel into an operational relationship with the prepared pipeline end section. The plug member is aligned with the pipeline end section and is inserted into the end section. Thereafter, the plug member is sealingly secured in the pipeline end section and the repair frame is removed from its operational relationship with the pipeline. The pipeline is dewatered and the end section is then raised onto a floating vessel. The repair frame, in addition to including means for holding and manipulating the plug member, also has a manually operable control panel manipulating means for controlling operations of the repair frame, and a submersible vehicle docking station to position a submersible vehicle in an operative relationship to the control panel manipulating means. The repair frame is…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.