Apparatus and methods for making azimuthal resistivity measurements with off-set directional antennas
US10365391B2 · kind B2 · utility
2Cited by
2References
11Claims
0Family size
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Key dates
| Filing date | Sep 9, 2017 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Sep 13, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A resistivity measuring tool used in a drillstring having a drill bit on a distal end for drilling a wellbore in a formation includes a tool body having a longitudinal axis, a pair of transmitter antennas having magnetic moments parallel to the longitudinal axis of the tool body, and a pair of receiver antennas radially spaced from the longitudinal axis of the tool body and having transverse magnetic moment components pointed in opposite directions, wherein at least one of the receiver antennas has a transverse magnetic moment angled with respect to a component normal to the longitudinal axis of the tool body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.