Systems and methods for installation, design and operation of groundwater monitoring systems in boreholes
US7493954B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 8, 2005 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Jan 13, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Systems and methods for installation and operation of a groundwater monitoring system in a borehole of any angle using a coaxial gas displacement pump with a unique O-ring assembly that serves as a two-position valve for groundwater purging and sampling and also as a housing and sealing mechanism for isolating an optical pressure sensor. The optical sensor measures in-situ hydraulic pressure directly subjacent and adjacent to the surrounding rock fractures and sediment pores without hydraulic interferences from potentiometric equilibration lag time from recovery fluid pressure inside a borehole, in a zone above the optical sensor, or on the inside of a riser pipe that rises to the ground surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.