Use of cesium as a tracer in coring operations
US6912898B2 · kind B2 · utility
53Cited by
20References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 8, 2003 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Jul 8, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B25/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for measuring the infiltration of coring fluid into a core sample taken from a formation comprises a) providing a coring fluid containing cesium in a first concentration, b) using the coring fluid and a coring means to generate the core sample, c) determining the concentration of cesium present in the core sample; and d) comparing the core sample cesium concentration to the first concentration. A further preferred step comprises using the comparison in step d) to calculate the degree of infiltration of the coring fluid into the core sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.