Water well stagnant bottom rehabilitation means and method
US6138750A · kind A · utility
13Cited by
6References
4Claims
0Family size
Inventor
Key dates
| Filing date | Jun 29, 1998 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Jun 29, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus and method of rehabilitating the stagnant bottom of water wells using existing well equipment including a pump and a pressure tank, augmented by valves and a conduit that extends from the surface to near the bottom of the stagnant region at the well bottom. Water pumped from the well is returned under pressure to the well bottom where it displaces the fouled contents of the stagnant region at the well bottom. This elevates the contents of the well bottom to a position above the pump intake, where the contents can then be pumped to waste.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.