Borehole seismic receiver
US4715469A · kind A · utility
18Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1985 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Aug 29, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/911
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A seismic receiver is provided for measuring seismic signals transmitted through the earth and received in a well borehole. A reversible electrical motor drives a harmonic drive reducer which amplifies the torque provided to drive a ball screw. The ball screw moves linearly along the axis of the well borehole to control the extension of a clamp arm into and out of an extended position in contact with subsurface earth adjacent the well borehole. A releasable electric clutch is provided so the receiver is retrievable in the event of a power failure while the clamp arm is extended.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.