Surface/downhole pressure recording system
US5515039A · kind A · utility
5Cited by
2References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Jul 19, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for the output of data on a two wire cable system from a downhole well tool which has a system with sensor devices, a processor, a clock, a memory and a voltage/current communications device which are all powered by a d.c. battery to a surface read-out where the downhole well tool is actuated for cable transmission of data during operation by an additional power source which is provided from a surface power source so that failure of the cable transmission does not affect the well tool collection of data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.