Method and apparatus for measuring pressure in a sealed well using a differential transducer
US5337601A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1993 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Jan 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method are disclosed for measuring pressure in a sealed well using a differential transducer. A differential transducer is employed in a number of applications to measure either the pressure in the upper portion of a well or the level of liquid contained in the well. In each application, the back side of the differential transducer is vented to the same pressure as is present in the upper portion of the well. In one embodiment, the present invention is used to determine information relating to the liquid level in a well during a soil vapor extraction procedure. The information is then used to control a pump which maintains a desired liquid level in the well. In another embodiment, the present invention is used to determine information relating to the liquid level in a well during a pneumatic slug test. The information is then used to determine how quickly the well can recover from changes in pressure. In an alternate embodiment, the present invention is used to measure the effects of a vacuum applied to one well on another well located some distance away. The measured effect is then used to calculate the permeability of the soil between the wells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.