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US3671932A
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Two-sweep signal transmission and reception in seismic exploration
Assignee: Western Atlas International Inc
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Filing: 1970-05-04
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Granted: 1972-06-20
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Expires: 1990-05-04
Abstract
Abstract This invention contemplates a method of seismic exploration using vibrators which are driven simultaneously by the combination of two distinct sweep signals. The combined signal is obtained, for example, by adding or subtracting the two distinct signals. The reflected seismic signals are detected in the usual fashion and recorded on a recording medium such as magnetic tape. If the number of seismic signals transmitted into the ground is an even number then the reflected seismic signals corresponding to each of said distinct signals can be obtained by summing, which includes adding and/or subtracting, the detected seismic signals.
Inventors
- 👤 Mark Holzman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:25
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/003; G01V1/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
A method of seismic exploration comprising the steps of: selecting a first desired electric signal, selecting a second desired electric signal, forming an even number of composite electric signals by algebraically summing said first and second electric signals, converting each composite electric signal to a composite acoustic signal, transmitting each composite acoustic signal into the earth, detecting each transmitted acoustic signal after it has travelled through a portion of the earth, converting each detected signal into a corresponding detected composite electric signal, and recording each detected composite electric signal.
Claim 2
Independent Claim
89 words
A method of seismic exploration comprising the steps of: selecting a first desired electric signal, selecting a second desired electric signal, forming an even number of composite electric signals by algebraically summing said first and second electric signals, converting each composite electric signal to a composite acoustic signal, transmitting each composite acoustic signal into the earth, detecting each transmitted acoustic signal after it has travelled through a portion of the earth, converting each detected signal into a corresponding detected composite electric signal, and recording each detected composite electric signal.
Claim 3
Dependent Claim
19 words
The method of claim 1 and further including the step of: algebraically summing the recorded detected composite electric signals.
Claim 4
Dependent Claim
34 words
The method of claim 2 wherein, the sum of additions and/or subtractions of said recorded detected composite electric signals provides the sum of the detected electric signals resulting only from said first electric signals.
Claim 5
Dependent Claim
34 words
The method of claim 2 wherein, the sum of additions and/or subtractions of said recorded detected composite electric signals provides the sum of the detected electric signals resulting only from said second electric signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |