Apparatus and methods for fast NMR well logging without instrument speed effects
US9759832B1 · kind B1 · utility
3Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2016 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Apr 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/56563
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for NMR properties of subsurface formations includes a magnet, a transmitter antenna and at least one of a receiver section of the transmit antenna or a separate receiver antenna having a length along the longitudinal dimension of the apparatus which is shorter than a length of the transmitter antenna along the longitudinal dimension. The apparatus includes circuitry for applying radio frequency current pulses to the entire transmitter antenna and for receiving signals by the at least one of the receiver section of the transmitter antenna and the separate receiver antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.