Patent US3615959A successfully refreshed from Google Patents.
US3615959A
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Vacuum filling process for liquid filled marine seismic cables
Assignee: Schlumberger Technology Corp
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Filing: 1969-07-22
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Granted: 1971-10-26
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Expires: 1989-07-22
Abstract
Abstract A technique for completely filling a stoppered hollow marine seismic cable with a compatible filling liquid such as kerosene, wherein the air in a hollow cable on a spool is first evacuated with a vacuum pump, and wherein the liquid is thereafter pumped into the cable until it is full. Improved evacuation and filling means are also provided which prevent loss of vacuum during the filling process.
Inventors
- 👤 Larry J Nance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:51
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/38; G01V1/3843; H; H01; H01B; H01B7/00; H01B7/04; H01B7/045; H01B7/12; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0441; Y10T137/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A method for filling flexible, nonmetallic hollow marine seismic cables with a liquid while spooled on a drum, comprising the steps of: closing off one end of a hollow marine seismic cable spooled on a drum, applying a suction to the other end of said cable to evacuate air from the interior of said cable and to reduce the pressure therein, thereafter, without disturbing the condition of the reduced pressure in the interior of the cable, supplying a flow of liquid under pressure to said other end of said cable until the cable is filled with liquid, and sealing said other end to entrap the liquid within the cable.
Claim 2
Independent Claim
167 words
A method of substantially filling the interior of a coiled, flexible, hollow, nonmetallic marine seismic cable or the like with a liquid, comprising connecting a vacuum pump to the interior of said cable at a selected end thereof and sealing off the other end, actuating said pump and evacuating air from the interior of said cable through said selected end to reduce the pressure in the cable, after reducing the pressure in the cable, sealing the interior of said cable from ambient atmospheric pressure, disconnecting said vacuum pump from the interior of said cable without disturbing the reduced pressure in the cable, connecting a supply of liquid to said selected end of said cable, opening the interior of said cable to said supply of liquid, and pumping liquid from said supply into the interior of said cable through said selected end thereof until said interior is at least substantially filled with liquid, disconnecting said supply of liquid from said cable, and sealing said liquid in said cable.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |