Formation sampling methods and systems
US10533415B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2016 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Sep 6, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/94
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A formation sampling method includes disposing a downhole tool comprising a packer and an expandable probe within a wellbore. The method also includes performing pressure transient testing by setting the expandable packer and the probe to engage a wall of the wellbore and measuring a pressure response at the expandable packer and the probe while withdrawing formation fluid into the downhole tool through the expandable packer. The method further includes monitoring a contamination level of the formation fluid during the pressure transient testing, and performing formation sampling with the probe in response to determining that the monitored contamination level meets a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.