US3876464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water and gas blocked logging cable
Assignee: Schlumberger Technology Corp
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Filing: 1973-06-29
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Granted: 1975-04-08
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Expires: 1993-06-29
Abstract
Abstract Method and apparatus for forming a stranded core electrical cable such as well logging cable that is water and gas-blocked by virtue of having all of the interstices of the inner stranded conductor filled with a vulcanizable liquid elastomer before application of an insulative coating. Substantially all void spaces are eliminated by vacuum application of vulcanizable liquid into spools of cable to prevent collection of gas anywhere within the cable that might cause cable malfunction due to high temperatures and pressures or due to migration of gas or water along the core of the cable.
Inventors
- 👤 Richard P Mcnerney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:39
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/32; H01B13/322; H01B13/328
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
A METHOD OF FILLING STRANDED ELECTRICAL CABLE WITH LIQUID AND GAS BLOCKING MATERIAL IN LIQUID FORM TO PROVIDE A FILLED STRANDED CONDUCTOR ABOUT WHICH IS SUBSEQUENTLY DISPOSED A COVERING OF INSULATION MATERIAL, SAID METHOD COMPRISING: PROVIDING A VACUUM CHAMBER; PROVIDING A LENGTH OF STRANDED ELECTRICAL CONDUCTOR WOUND ABOUT A CABLE SPOOL; PLACING A QUANTITY OF VUCANIZABLE GAS AND LIQUID BLOCKING MATERIAL IN LIQUID FORM WITHIN SAID VACUUM CHAMBER; PLACING SAID SPOOL OF WOUND STRANDED ELECTRICAL CONDUCTOR IN SAID VACUUM CHAMBER AND SUBMERGING SAID SPOOL IN SAID LIQUID; CLOSING SAID VACUUM CHAMBER; COMMUNICATING SUBATMOSPHERIC PRESSURE INTO SAID VACUUM CHAMBER CAUSING AIR PRESENT IN THE INTERSTICES OF SAID STRANDARD ELECTRICAL CONDUCTO TO BECOME EVACUATED AND DISPLACED WITH SAID LIQUID; COMMUNICATING SUBATMOSPHERIC PRESSURE TO THE INTERIOR OF SAID SPOOL OF WOUND STRANDED ELECTRICAL CONDUCTOR ADJACENT THE HUB OF SAID SPOOL WHILE SAID SPOOL IS DISPOSED WITHIN SAID VACUUM CHAMBER FOR DISPLACING AIR FROM THE STRANDED CONDUCTOR WOUND AT THE INTERIOR OF SAID SPOOL AND FILLING SAID STRANDED CONDUCTOR WITH SAID LIQUID MATERIAL; AND REMOVING SAID SPOOL OF STRANDED ELECTRICAL CONDUCTOR FROM SAID VACUUM CHAMBER.
Claim 2
Independent Claim
181 words
A METHOD OF FILLING STRANDED ELECTRICAL CABLE WITH LIQUID AND GAS BLOCKING MATERIAL IN LIQUID FORM TO PROVIDE A FILLED STRANDED CONDUCTOR ABOUT WHICH IS SUBSEQUENTLY DISPOSED A COVERING OF INSULATION MATERIAL, SAID METHOD COMPRISING: PROVIDING A VACUUM CHAMBER; PROVIDING A LENGTH OF STRANDED ELECTRICAL CONDUCTOR WOUND ABOUT A CABLE SPOOL; PLACING A QUANTITY OF VUCANIZABLE GAS AND LIQUID BLOCKING MATERIAL IN LIQUID FORM WITHIN SAID VACUUM CHAMBER; PLACING SAID SPOOL OF WOUND STRANDED ELECTRICAL CONDUCTOR IN SAID VACUUM CHAMBER AND SUBMERGING SAID SPOOL IN SAID LIQUID; CLOSING SAID VACUUM CHAMBER; COMMUNICATING SUBATMOSPHERIC PRESSURE INTO SAID VACUUM CHAMBER CAUSING AIR PRESENT IN THE INTERSTICES OF SAID STRANDARD ELECTRICAL CONDUCTO TO BECOME EVACUATED AND DISPLACED WITH SAID LIQUID; COMMUNICATING SUBATMOSPHERIC PRESSURE TO THE INTERIOR OF SAID SPOOL OF WOUND STRANDED ELECTRICAL CONDUCTOR ADJACENT THE HUB OF SAID SPOOL WHILE SAID SPOOL IS DISPOSED WITHIN SAID VACUUM CHAMBER FOR DISPLACING AIR FROM THE STRANDED CONDUCTOR WOUND AT THE INTERIOR OF SAID SPOOL AND FILLING SAID STRANDED CONDUCTOR WITH SAID LIQUID MATERIAL; AND REMOVING SAID SPOOL OF STRANDED ELECTRICAL CONDUCTOR FROM SAID VACUUM CHAMBER.
Claim 3
Dependent Claim
32 words
The method according to claim 1, including the method step of: passing said filled electrical conductor through wiping means for removing excess liquid material from said conductor and for providing a smooth
Claim 4
Dependent Claim
40 words
The method according to claim 1, including the method step of: cycling the subatmospheric pressure condition within said vacuum chamber after said vacuum source of subatmospheric pressure has been applied by oscillating the pressure condition within said vacuum chamber without
Claim 5
Dependent Claim
75 words
The method according to claim 3, including the method step of: communicating subatmospheric pressure to the interior of said spool of wound stranded electrical conductor adjacent the hub of the spool after and simultaneously with communication of said subatmospheric pressure into said vacuum chamber about said spool of wound stranded electrical cable for displacing air from the wound stranded conductor at the interior of the spool and filling said stranded conductor with said liquid material.
Claim 6
Dependent Claim
90 words
The method according to claim 1, including the method step of: providing a container disposed in series with said source of subatmospheric pressure communicated to the interior of said spool; and continuing communication of said subatmospheric pressure to the interior of said spool until a quantity of said liquid material, drawn from the interior portion of the stranded conductor wound about said hub of said spool, enters said container, thereby indicating that all of the air at the interior of the wound stranded conductor has been displaced by said liquid.
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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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |