Wellbore fluid sampler and method
US5058674A · kind A · utility
108Cited by
13References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1990 |
| Grant date | Oct 22, 1991 |
| Priority date | — |
| Expiry date | Oct 24, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/082
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well fluid sampling apparatus provides a time delay after actuation of the tool and before a sample is taken. The tool is operated by well pressure acting on a piston. The piston is initially hydraulically blocked so that it cannot move. The time delay is provided after the piston begins moving. Additional time delay devices can optionally be included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.