Downhole pressure gauge converter
US5499533A · kind A · utility
Inventors
Key dates
| Filing date | Aug 26, 1992 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Aug 26, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The apparatus disclosed is a type of downhole pressure gauge to be used to measure and record pressure information about oil and gas wells. The apparatus measures fluctuations in pressure by means of a mechanical pressure sensitive device, such as a Bourdon tube, and records and stores this information by converting mechanical movement, associated with pressure changes as detected by the mechanical pressure sensitive device, into corresponding voltage changes across a potentiometer which are stored in an electronic memory board. The change in voltage over time corresponds to the change in well pressure over time, thereby providing important information to the well operator. Also disclosed is a method for measuring well pressure by means of combining a mechanical pressure sensitive device with an electrical system and an electronic memory board for storing the measurements. Also disclosed is a kit, whereby an existing downhole mechanical pressure gauge can be converted to a mechanical/electrical combination by the replacement of certain parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.