Method of well-testing by obtaining a non-flashing fluid sample
US5687791A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1995 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Dec 26, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus and method for testing a well and obtaining a fluid sample therefrom. The apparatus comprises a housing connectable to a tubing string and having a packer at the lower end thereof. The packer is set, and fluid is flowed from a formation or zone of interest into the chamber and then into a sampler in a controlled manner such that the fluid in the housing or sampler does not flash. In one embodiment, a pump is used to flow formation fluid; plugs are used in the housing to first flow dirty fluid and then flow clean fluid into the housing. In another embodiment, a nitrogen cushion is bled slowly to flow fluid into the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.