US3621380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for seismic-magnetic prospecting
Assignee: Texas Instruments Inc
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Filing: 1969-01-02
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Granted: 1971-11-16
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Expires: 1989-01-02
Abstract
Abstract Seismic disturbances are impinged upon underground magnetic bodies to cause time varying changes in the magnetic field of the bodies. These time varying changes are sensed to provide indications of the magnetization and depth of the bodies. Seismic reflections from the seismic disturbances are also sensed and recorded, with the time varying changes processed in conjunction with the seismic reflections to eliminate noise and otherwise enhance the magnetic data.
Inventors
- 👤 Carl A Barlow Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:21
CPC Classifications
G; G01; G01V; G01V11/00; G01V1/00; G01V1/003; G01V3/00; G01V3/18; G01V3/26; G01V3/265
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
The method of seismic exploration comprising: a. generating a seismic disturbance, b. generating first electrical signals representative of time varying changes in the magnetic field of subsurface structure caused by impingement of said seismic disturbance upon said structure, c. receiving reflections of said seismic disturbance, d. generating second electrical signals representative of said reflections, and e. processing said first signals in conjunction with said second signals to enhance said first signals and produce an output signal representative of the magnetization and depth of said subsurface structure.
Claim 2
Independent Claim
86 words
The method of seismic exploration comprising: a. generating a seismic disturbance, b. generating first electrical signals representative of time varying changes in the magnetic field of subsurface structure caused by impingement of said seismic disturbance upon said structure, c. receiving reflections of said seismic disturbance, d. generating second electrical signals representative of said reflections, and e. processing said first signals in conjunction with said second signals to enhance said first signals and produce an output signal representative of the magnetization and depth of said subsurface structure.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said processing comprises: cross-correlating said first and second signals.
Claim 4
Dependent Claim
26 words
The method of claim 1 and further comprising: deconvolving said first signals to generate output signals representative of the magnetization and depth of said subsurface structure.
Claim 5
Dependent Claim
32 words
The method of claim 1 and further comprising: generating representations of the time interval between the generation of said seismic disturbance and the impingement of said seismic disturbance on said subsurface structure.
Claim 6
Dependent Claim
93 words
Apparatus for detection of a magnetic structure comprising: a. a source for directing compressional signals toward said magnetic structure, b. means for detecting time varying changes in the magnetic field of said magnetic structure caused by the impingement of said compressional signals, c. means for generating indications of the time intervals between generation of said compressional waves and the impingement thereof on said magnetic structure, and d. means responsive to said detected time varying changes and said indications of time intervals for generating representations of the magnetization and position of said magnetic structure.
Claim 7
Dependent Claim
93 words
Apparatus for detection of a magnetic structure comprising: a. a source for directing compressional signals toward said magnetic structure, b. means for detecting time varying changes in the magnetic field of said magnetic structure caused by the impingement of said compressional signals, c. means for generating indications of the time intervals between generation of said compressional waves and the impingement thereof on said magnetic structure, and d. means responsive to said detected time varying changes and said indications of time intervals for generating representations of the magnetization and position of said magnetic structure.
Claim 8
Dependent Claim
20 words
The apparatus of claim 5 and further comprising: means for cross-correlating signals representative of said changes in the magnetic field.
Claim 9
Dependent Claim
30 words
The apparatus of claim 5 and further comprising: means for deconvolving said time varying changes in the magnetic field for generating said representations of the magnetization of said magnetic structure.
Claim 10
Dependent Claim
15 words
The apparatus of claim 5 wherein said means for detecting comprises at least one magnetometer.
Claim 11
Dependent Claim
20 words
The apparatus of claim 5 and further comprising geophone means for generating electrical signals in response to said compressional signals.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |