Apparatus and method for wellbore resistivity determination and imaging using capacitive coupling
US6600321B2 · kind B2 · utility
78Cited by
7References
18Claims
0Family size
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Key dates
| Filing date | Mar 4, 2002 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Mar 4, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for obtaining resistivity images of a borehole having an oil-based mud includes a rotating measure electrode on a measurement-while-drilling apparatus. A modulated measure current is capacitively coupled to the formation through the nonconducting mud. The electrode may be carried on a stabilizer of the drilling assembly. An extendable arm may be used to maintain a desired distance between the electrode and the formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.