Superheterodyne seismic vibrator and method
US7907474B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2007 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Apr 27, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/588
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A seismic energy source includes at least a first and a second acoustic radiator operatively coupled to a non-linear medium proximate an upper limit of formations in the Earth's subsurface. The first and second acoustic radiators are configured to convert electrical energy directly into acoustic energy. The source includes means for operating the first and the second acoustic radiator at respective first and second frequencies. The first and second frequencies are selected such that substantially no acoustic energy propagates through the non-linear medium. The first and the second frequencies are selected such that a difference therebetween is swept through a range of frequencies of seismic energy capable of propagating through the Earth's subsurface to at least one acoustic impedance boundary within the Earth's subsurface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.