Verification of a surface controlled subsurface actuating device
US4617960A · kind A · utility
68Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 3, 1985 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | May 3, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8242
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for verifying the effectiveness of electromagnetic signal control of a subsurface safety valve installed in a well. Signals are transmitted from a surface station to actuate the subsurface installed valve. Signals received at the valve are decoded and information relating to them is stored. A sensor detects actual valve actuation and provides signals indicative thereof which are also stored. After the valve is removed from its downhole installation, the stored signals are read, and the data indicated thereby is compared with data recorded at the time of signal transmission from the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.