High pressure and high temperature optical spectroscopy cell using spherical surfaced lenses in direct contact with a fluid pathway
US8564768B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | May 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0639
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Devices, methods and systems for making optical measurements of a fluid at elevated pressures and temperatures are disclosed. A cell is designed for the optical spectroscopic measurements of fluids or gas using light from ultra violet (UV) to far infrared wavelengths, among other wavelengths. A cell is described that is well suited for applications using very small fluid volumes, on the order of micro liters, such as microfluidic systems. Some described embodiments are suited for very high pressure and temperature environments (for example, 20 kpsi or greater at 175 degree C. or greater). Such conditions, for example, may be found in oilfield downhole environments. Some embodiments provide are inexpensive, and make use of replaceable lenses that are used as a pressure barrier and for collimation of the optical beam path for spectroscopic measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.