Method and apparatus for pressure coring with non-invading gel
US5482123A · kind A · utility
40Cited by
26References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Oct 25, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B25/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A pressure core barrel including an inner tube containing a non-invasive gel for encapsulating a core sample. An anti-whirl core bit is employed, and the core bit and inner tube pilot shoe are configured and arranged to prevent damage to the core from drilling fluid. A special high viscosity, low spurt loss coring fluid is employed in the coring operation. When the encapsulated, pressurized care sample is brought to the surface, pressure is bled off and the core sample's chemical and mechanical integrity are substantially preserved by the gel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.