Core marking system for a sidewall coring tool
US5310013A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Aug 24, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B25/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for reliably indexing and separating sidewall core samples obtained with a sidewall coring tool comprises markers made of a magnetic material and a mechanism body made of a combination of magnetic and non-magnetic materials to reliably insert and position markers in between successive core samples. The sidewall core is not altered in any way by the marking process. Further, a flexible rubber boot apparatus is disclosed to ensure the complete transfer of retrieved samples in cases where the sample is broken, shattered or segmented and to ensure that broken, shattered or segmented cores will be retrieved in cases where the borehole is horizontal and the tool must operate in a horizontal position or in any other rotational orientation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.