Methods and devices for filling tanks with no backflow from the borehole exit
US8997861B2 · kind B2 · utility
0Cited by
35References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 7, 2012 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | May 17, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for sampling fluid from a subsurface formation includes retrieving fluids from the formation using a plurality of pumps. The method also includes the steps of controlling a flow of the retrieved fluids using at least a first valve and a second valve and estimating an operating parameter of at least one pump of the plurality of pumps. The method further includes the step of controlling the first valve and the second valve using the estimated operating parameter to initiate a fluid sampling event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.