Patent US3748638A successfully refreshed from Google Patents.
US3748638A
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Seismic exploration system
Assignee: Shell USA Inc
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Filing: 1971-11-08
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Granted: 1973-07-24
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Expires: 1991-11-08
Abstract
Abstract A seismic data acquisition system and method wherein each geophone station is coupled to a data acquisition and telemetry unit module with individual modules being coupled to each other and a central recording station by a single data link such as a coaxial cable, a pair of conductors or radio link.
Inventors
- 👤 W Montgomery
- 👤 W Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:51
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
171 words
A seismic system comprising: a plurality of geophones, said geophones being divided into groups, each group forming a geophone station; a data acquisition system associated with each geophone station, each data acqusition station including a gain ranging amplifier means, an analog-to-digital conversion means, and data repeater and transmitter means, the geophones of each station being coupled to the gain ranging amplifier associated with the station, said gain ranging amplifier being coupled to the analog-to-digital converter, said analog-to-digital converter being coupled to said data repeater and transmitter means, and a central recording means, each of said data acqusition systems being coupled to the data repeater and transmitter means of the succeeding data acqusition system by a single data link, the last data acqusition system being coupled to said central recording system by a single data link, each of said data acqusition systems receiving digital data from the preceding data acqusition system, adding its own digital data and transmitting the received and added digital data to the succeeding station over said data link.
Claim 2
Dependent Claim
171 words
A seismic system comprising: a plurality of geophones, said geophones being divided into groups, each group forming a geophone station; a data acquisition system associated with each geophone station, each data acqusition station including a gain ranging amplifier means, an analog-to-digital conversion means, and data repeater and transmitter means, the geophones of each station being coupled to the gain ranging amplifier associated with the station, said gain ranging amplifier being coupled to the analog-to-digital converter, said analog-to-digital converter being coupled to said data repeater and transmitter means, and a central recording means, each of said data acqusition systems being coupled to the data repeater and transmitter means of the succeeding data acqusition system by a single data link, the last data acqusition system being coupled to said central recording system by a single data link, each of said data acqusition systems receiving digital data from the preceding data acqusition system, adding its own digital data and transmitting the received and added digital data to the succeeding station over said data link.
Claim 3
Dependent Claim
50 words
The seismic system of claim 1 wherein each of said data acquisition systems includes a local clock, storage means for storing the data received from the preceding station, and means for re-transmitting under the control of the local clock both the stored data and the data produced at the station.
Claim 4
Dependent Claim
15 words
The seismic system of claim 2 wherein said data link comprises a pair of conductors.
Claim 5
Dependent Claim
14 words
The seismic system of claim 2 wherein said data link comprises a coaxial cable.
Claim 6
Dependent Claim
36 words
The seismic system of claim 2 and in addition a data loss detector, said data loss detector actuating said data acqusition system after a preset time delay if no data is received from the preceding station.
Claim 7
Dependent Claim
46 words
The seismic system of claim 2 and in addition means for decoding said incoming data to obtain separate data and incoming clock pulses, a clearing means, said clearing means utilizing said incoming clock pulses to initiate the re-transmission of data under control of said local clock.
Claim 8
Dependent Claim
53 words
The seismic system of claim 6 wherein said storage means comprises a first shift register, a latch circuit and second shift register, said decoded data being supplied to said first shift register in serial form, then transferred to said latch circuit in parallel form and transferred to said second register in parallel form.
Claim 9
Independent Claim
105 words
The method of seismic exploration comprising: establishing a plurality of geophone stations, each station containing at least one geophone; at each geophone station converting the seismic data to a digital form of data under the control of a local clock pulse; transmitting the digital data from each station to the succeding station; in addition re-transmitting from each station the digital data received from the preceding station, said re-tRansmitted data being transmitted under the control of the local clock of the station; transmitting the digital data from the last station to a central recording station under the control of the local clock of the last station.
Claim 10
Independent Claim
105 words
The method of seismic exploration comprising: establishing a plurality of geophone stations, each station containing at least one geophone; at each geophone station converting the seismic data to a digital form of data under the control of a local clock pulse; transmitting the digital data from each station to the succeding station; in addition re-transmitting from each station the digital data received from the preceding station, said re-tRansmitted data being transmitted under the control of the local clock of the station; transmitting the digital data from the last station to a central recording station under the control of the local clock of the last station.
Claim 11
Dependent Claim
29 words
The method of claim 8 and in addition decoding the incoming data to obtain the incoming clock pulse and using the incoming clock pulse to synchronize the local clock.
Claim 12
Dependent Claim
27 words
The method of claim 9 wherein the decoded incoming data is stored for a time period before it is re-transmitted under the control of the local clock.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |