Seismic telemetric system for land operations
US4117448A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Apr 13, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The telemetric system consists of a large number of identical cable sections laid over the ground end-to-end, in a long array or "spread". The cables have a number of external connectors along their length for connecting geophone groups. The cables are electrically and physically interconnected by a like number of data transceiver modules. The data transceiver modules contain circuitry to receive and process data from the various geophone groups. A recording and control unit is connected to the spread at some convenient accessible location. The recording and control unit transmits control signals to the respective data transceiver modules. In response to the control signals, the respective modules transmit digital seismic signals, back to the recording and control unit. The cable sections and data transceiver modules are not polarized; that is, it is immaterial which end of a cable section is plugged into which side of a transceiver module. The same telemetric link that is used to transmit command and interrogation pulses to the respective transceiver modules is also used to receive digital data words from the respective modules. Accordingly, a direction sense circuit in each modul…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.