US4463451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for seismic digital data acquisition over water covered areas
Assignee: BP Corp North America Inc
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Filing: 1982-01-11
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Granted: 1984-07-31
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Expires: 2002-01-11
Abstract
Abstract A seismic data acquisition system for use in shallow water covered areas comprises a flotation device which serves also to house the electronic components; anchoring device with mechanical filter device to protect the anchor, so as to insure its maintaining its position; seismic sensor device for detecting seismic waves in the water and converting them to electrical signals; radio receiver device for receiving operational control instructions; and device for amplifying, digitizing and storing the electrical signals provided by the sensor, preferably on a removable tape recording device.
Inventors
- 👤 Ralph E. Warmack
- 👤 O. Guy Marney, Jr.
- 👤 John N. Gallagher
- 👤 Paul R. Passmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:01
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/38; G01V1/16; Y; Y10; Y10S; Y10S181/00; Y10S181/40; Y10S181/402
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A marine seismic data acquisition system, comprising: a seismic recording system; a float adapted to house said seismic recording system; a cable having one end thereof attached to said float; an anchor adapted to fix the position of said float to the sea floor; and tension filter means serially attaching an opposite end of said cable to said anchor for filtering out mechanical forces tending to jar said anchor loose.
Claim 2
Dependent Claim
70 words
A marine seismic data acquisition system, comprising: a seismic recording system; a float adapted to house said seismic recording system; a cable having one end thereof attached to said float; an anchor adapted to fix the position of said float to the sea floor; and tension filter means serially attaching an opposite end of said cable to said anchor for filtering out mechanical forces tending to jar said anchor loose.
Claim 3
Dependent Claim
22 words
The apparatus as in claim 1 in which said tension filter means comprises at least one series combination of spring and mass.
Claim 4
Dependent Claim
67 words
The apparatus as in claim 1 in which said tension filter means comprises: a first selected length of flexible extensible tension means attached at its first end to the opposite end of said cable; a drag weight of selected mass connected at its first end to the second end of said flexible extensible tension means; and said anchor attached to the second end of said drag weight.
Claim 5
Dependent Claim
17 words
The apparatus as in claim 3 in which said flexible extensible tension means comprises a stretched cord.
Claim 6
Dependent Claim
17 words
The apparatus as in claim 3 in which said flexible extensible tension means comprises a helical spring.
Claim 7
Dependent Claim
63 words
The apparatus as in claim 3 in which said drag weight comprises: at least one flat cylindrical weight of heavy material having an axial opening; a rod passing through and locked in said axial opening so that it extends at both ends beyond the faces of said weight; and means at each of said rod means to attach said flexible extensible tension means.
Claim 8
Dependent Claim
38 words
The apparatus as in claim 3 in which said drag weight comprises a monolithic structure of a heavy metal in the form of a central cylinder of selected diameter and length with projecting axial rods at both ends.
References Cited (Backward Citations)
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US3369216A
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US4236234A
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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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |