Downhole seismic source
US7617908B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2006 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Feb 5, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/147
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Elastodynamic waves are generated by a tool having a hammer rotatably connected with a housing by a first hinge and an actuator arm rotatably connected with the hammer by a second hinge. An axial force applied to the actuator arm by a drive shaft and spring is translated and amplified to a radial impact force by rotation of the hammer around the first hinge. The tool may also include a stabilizer arm connected to the actuator arm by a third hinge, and connected to the housing by a fourth hinge. The housing may be an acoustic wireline tool cylinder having an opening that permits the hammer mass to extend outside the housing when rotated in a first direction. The housing may also include a second opening that permits the hammer mass to extend outside the housing when rotated in a second direction, and a third opening that permits the hammer mass to extend outside the housing when rotated between the first and second openings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.