Downhole sampling tool with check valve piston
US10487652B2 · kind B2 · utility
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1References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2016 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Jun 4, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sampling tool includes a tubular member and a sampling piston positioned within the tubular member. The sampling piston has a bore formed axially-therethrough. A secondary piston is positioned within the bore of the sampling piston. A check valve assembly is positioned at least partially within the tubular member. The secondary piston and the check valve assembly move together with respect to the tubular member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.