Optimization of sample cleanup during formation testing
US9068438B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2012 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Jan 12, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/081
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Disclosed is a formation testing tool for extracting formation fluid from an earth formation penetrated by a borehole having a drilling fluid. The tool includes: a sample flow element configured to extract formation fluid from the formation in a sample zone; a sample zone seal forming a perimeter defining the sample zone; a contamination removal flow element configured to extract formation fluid contaminated with the drilling fluid from a contamination removal zone in the formation; a contamination removal zone seal forming a perimeter defining the contamination removal zone, which surrounds and excludes the sample zone; and a controller configured to control a sample flow rate in the sample flow element and a contamination removal flow rate in the contamination flow removal element in order to decrease an amount of time required to acquire a sample of the formation fluid having an acceptable amount of contamination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.