Small diameter dual pump pollutant recovery system
US4934458A · kind A · utility
Inventors
Key dates
| Filing date | Mar 10, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Mar 10, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/047
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A groundwater pollutant recovery system using the cone of depression approach, in which a sensing probe having liquid level sensors responsive to both water and pollutant levels and having attached to it the pollutant intake is deployed in a recovery well above the submerged water and pollutant pumps. The pollutant intake on the sensing probe is attached to the pollutant pump by an extendable hose so that the sensing probe may be raised and lowered in response to changing hydraulic conditions in the well without the necessity of changing the water or pollutant pump positions. The recovery sequence is controlled by a microprocessor under the control of a program responsive to the liquid levels indicated by the sensors in the sensing probe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.