Induction well logging apparatus and method
US6794875B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 2002 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | May 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A coil arrangement and method of collecting and processing data in induction logging of wells is disclosed. The coil arrangement includes three essentially identical coils made of elliptical conductive loops lying in a plane tilted from the axis of the logging tool. Each coil is centered on the same point in space. Data are preferably collected by using the coil arrangement for both transmitter and receiver, and transmitting at three closely-spaced frequencies, one from each of the transmitter coils. The transmitted signals are received and recorded, at which time they are operated on mathematically to create rotation of an after-the-fact virtual sonde for measuring desired earth formation properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.