Modified formation testing apparatus and method
US6157893A · kind A · utility
156Cited by
18References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1999 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Apr 30, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus and method for obtaining samples of pristine formation or formation fluid, using a work string designed for performing other downhole work such as drilling, workover operations, or re-entry operations. An extendable element extends against the formation wall to obtain the pristine formation or fluid sample. While the test tool is in a standby condition, the extendable element is withdrawn within the work string, protected by other structure from damage during operation of the work string. The test apparatus is mounted on a sliding, non-rotating, sleeve on the work string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.