Method for transmission of pressure signals through a conduit
US4308884A · kind A · utility
11Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1980 |
| Grant date | Jan 5, 1982 |
| Priority date | — |
| Expiry date | Jul 24, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86445
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved method for transmitting fluid pressure signals through a conduit is disclosed wherein time delay is minimized. In the practice of this invention, a pressure pulse is applied to a conduit for a predetermined time interval and thereafter reduced to a maintenance level. The invention is particularly useful in sequentially controlling subsea oil well valves from a remote surface station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.