US4477887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low noise mounting for accelerometer used in marine cable
Assignee: Shell USA Inc
•
Filing: 1981-09-08
•
Granted: 1984-10-16
•
Expires: 2001-09-08
Abstract
Abstract A marine seismic streamer cable having both pressure responsive and acceleration responsive transducers disposed therein. The accelerometer responds to acceleration along one axis regardless of its orientation about the other axis. The accelerometer is mounted in the streamer cable and responds to accelerations produced by a seismic source but is insulated from the noise and motion produced as the streamer cable is towed through the water.
Inventors
- 👤 Albert J. Berni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:32
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/20; G01V1/201
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
A seismic streamer cable for use in marine seismic surveys, said cable comprising: a flexible tubular member, said tubular member being filled with a liquid; a plurality of stress members positioned in said flexible tubular member; an acceleration-responsive transducer, said acceleration responsive transducer being potted in an outer case and adapted to measure the vertical component of acceleration independent of its orientation; and a body having an aperture therein for containing said outer case, said body being made of a material such that the density of the combination of said acceleration responsive transducer in said outer case and said body is substantially equal to the density of said liquid.
Claim 2
Dependent Claim
109 words
A seismic streamer cable for use in marine seismic surveys, said cable comprising: a flexible tubular member, said tubular member being filled with a liquid; a plurality of stress members positioned in said flexible tubular member; an acceleration-responsive transducer, said acceleration responsive transducer being potted in an outer case and adapted to measure the vertical component of acceleration independent of its orientation; and a body having an aperture therein for containing said outer case, said body being made of a material such that the density of the combination of said acceleration responsive transducer in said outer case and said body is substantially equal to the density of said liquid.
Claim 3
Dependent Claim
61 words
A seismic streamer cable as recited in claim 1, wherein said plurality of stress members comprises three stress members and wherein said body comprises two end sections having three radial arms with three semicylindrical members sized to fit in the spaces between said radial arms such that one of said three stress members is positioned adjacent each of said semicylindrical members.
Claim 4
Dependent Claim
20 words
A seismic streamer cable as recited in claim 1, wherein said potting material surrounding said acceleration responsive transducer comprises epoxy.
Claim 5
Dependent Claim
26 words
A seismic streamer cable as recited in claim 2, further comprising resilient means for decoupling said acceleration responsive transducer from vibrations propagating along said stress members.
Claim 6
Dependent Claim
25 words
A seismic streamer cable as recited in claim 4, wherein said resilient means comprises resilient foam positioned between said stress members and said semicylindrical members.
Claim 7
Dependent Claim
33 words
A seismic streamer cable as recited in claim 5, wherein said resilient means further comprises resilient foam positioned between the spaces formed between said radial arms of said body and said semicylindrical members.
Claim 8
Dependent Claim
16 words
A seismic streamer cable as recited in claim 6, wherein said body is a metallic housing.
Claim 9
Dependent Claim
28 words
A seismic streamer cable as recited in claim 1, further comprising resilient means for decoupling said acceleration responsive transducer from vibrations propagating along said plurality of stress members.
Claim 10
Dependent Claim
16 words
A seismic streamer cable as recited in claim 8, wherein said resilient means comprises resilient foam.
Claim 11
Dependent Claim
42 words
A seismic streamer cable as recited in claim 1, wherein said body has a plurality of radial arms having apertures therein to accommodate said plurality of stress members and a central aperture, said acceleration responsive means being positioned in said central aperture.
Claim 12
Dependent Claim
33 words
A seismic streamer cable as recited in claim 10, wherein said plurality of stress members comprises three stress members and said plurality of radial arms on said mounting means comprises three radial arms.
References Cited (Backward Citations)
US3054085A
Cited
US3299397A
Cited
US4078223A
Cited
US4210897A
Cited
US4134097A
Cited
US4296481A
Cited
US4317185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |