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US3864667A
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Apparatus for surface wave parameter determination
Assignee: ConocoPhillips Co
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Filing: 1970-09-11
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Granted: 1975-02-04
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Expires: 1990-09-11
Abstract
Abstract An improved method and apparatus for determining the parameters of a near surface layer and particularly the parameters of the weathering layer utilizing the variation of phase velocity with respect to frequency of surface waves generated by a continuously varying frequency signal and subsequently utilizing the determined parameters of the weathering layer to calculate a time correction factor to correct the reflection traces of a seismogram.
Inventors
- 👤 Dhari S Bahjat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:39
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
Apparatus for determining the observed frequency and the observed phase shift of a surface wave at a particular test location, the observed frequency and the observed phase shift being utilized to determine the parameters of a near surface layer of the earth, comprising: means for generating a continuously varying frequency seismic signal through the earth; a pair of detectors disposed at the test location adapted to detect the surface wave component of the seismic signal, the detectors being spaced a predetermined distance apart; means for measuring the observed frequency of the surface wave detected by the two detectors; and means for measuring the observed phase shift of the surface wave detected by the two detectors.
Claim 2
Dependent Claim
115 words
Apparatus for determining the observed frequency and the observed phase shift of a surface wave at a particular test location, the observed frequency and the observed phase shift being utilized to determine the parameters of a near surface layer of the earth, comprising: means for generating a continuously varying frequency seismic signal through the earth; a pair of detectors disposed at the test location adapted to detect the surface wave component of the seismic signal, the detectors being spaced a predetermined distance apart; means for measuring the observed frequency of the surface wave detected by the two detectors; and means for measuring the observed phase shift of the surface wave detected by the two detectors.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 wherein the means for measuring the observed frequency is further defined as being a frequency counter connected to each detector at the particular test location.
Claim 4
Dependent Claim
30 words
The apparatus of claim 1 wherein the means for measuring the observed phase shift is further defined as being an oscilloscope connected to each detector at the particular test location.
References Cited (Backward Citations)
US2354548A
Cited
US3015086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |