Borehole flow modulator and inverted seismic source generating system
US10001573B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2010 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | Nov 25, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to the vertical seismic profiling (VSP) of geological formations in which profiling is used to obtain information for performing precise interpretations of geophysical seismic data and better understanding of geophysical information. The disclosure involves using a sound source for generating primary and secondary seismic pulses within well boreholes. The seismic profiling system obtains information regarding a geological formation traversed by a borehole with controllable downhole seismic pulse generators with drill string tool(s). The tool(s) have contact with and are coupled to the formation. A seismic pulsing device (SPD) is attached to a portion of the drill string and a valve controller is used to control opening and closing the valve causing high amplitude short duration ultra wide band pressure pulses, generating primary seismic waves sent into surrounding geological formations. This generates secondary seismic waves received that can be detected by geophones or similar devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.