US5125847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling device for pipeline heating system
Assignee: Petroleo Brasileiro SA Petrobras
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Filing: 1991-09-13
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Granted: 1992-06-30
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Expires: 2011-09-13
Abstract
Abstract A device electrically connects fluid-carrying pipelines, particularly subsea pipelines carrying viscous fluids and/or containing organic residues, allowing for the application of electricity through same, with the purpose of heating those pipelines, so as to prevent or eliminate deposits of organic residues onto the internal walls of the pipelines. The device permits also the utilization of electricity in combination with the simutaneous injection of special fluids. Basically, it includes an electrically conducting pipe (5) which is introduced in a terminal pipe (1) carrying viscous fluid, which is put in contact with the internal steel layer (3) of the terminal pipe (1) by means of electrically conducting fastening element (8).
Inventors
- 👤 Carlos Alberto D. Goncalves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:42
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/01; F16L53/00; F16L53/30; F16L53/35; F16L53/37
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
Coupling device for a pipeline heating system for a flexible pipeline, comprising: a segment of electrically conducting pipe (5) introduced in a terminal pipe of said flexible pipeline (1), electrically isolating elements (6, 7) maintaining said segment of pipe remote from an internal steel layer (3) of said flexible pipeline (1), said segment of electrically conducting pipe (5) having in an extremity thereof internal to the flexible pipeline a fastening element (8) which achieves electrical contact between the flexible pipe line (1) and the segment of electrically conducting pipe (5); and means for connecting another extremity of the segment of electrically conducting pipe (5) to a source of electrical power and said segment of electrically conducting pipe being fastened to the terminal pipe of the flexible pipeline (1) by means of a sealing element (10) and a terminal coupling element (9).
Claim 2
Dependent Claim
141 words
Coupling device for a pipeline heating system for a flexible pipeline, comprising: a segment of electrically conducting pipe (5) introduced in a terminal pipe of said flexible pipeline (1), electrically isolating elements (6, 7) maintaining said segment of pipe remote from an internal steel layer (3) of said flexible pipeline (1), said segment of electrically conducting pipe (5) having in an extremity thereof internal to the flexible pipeline a fastening element (8) which achieves electrical contact between the flexible pipe line (1) and the segment of electrically conducting pipe (5); and means for connecting another extremity of the segment of electrically conducting pipe (5) to a source of electrical power and said segment of electrically conducting pipe being fastened to the terminal pipe of the flexible pipeline (1) by means of a sealing element (10) and a terminal coupling element (9).
Claim 3
Dependent Claim
53 words
Coupling device for a pipeline heating system, according to claim 1, wherein said segment of electrically conducting pipe (5) is connected to a bifurcated pipe to permit the injection of special fluids, such as solvents, air or water, simultaneously along with the application of electricity to said segment of electrically conducting pipe (5).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |