Internal pipeline plug for deep subsea operations
US4493589A · kind A · utility
4Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1983 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Feb 2, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/1283
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Pressure-tight pipeline plugs are used in subsea connection operations to achieve a lightweight pipe condition which facilitates alignment by easing handling problems. An internal plug is provided for this purpose which is particularly useful for connection operations using a pipelay vessel, and which is capable of sealing, remotely releasing and then being pumped out of the line to a terminus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.