US3285290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for plugging pipelines
Assignee: Benson Electric Co
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Filing: 1962-04-23
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Granted: 1966-11-15
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Expires: 1982-04-23
Abstract
No abstract record available.
Inventors
- 👤 Morrison Bill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/1283; G; G01; G01M; G01M3/00; G01M3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A METHOD OF ISOLATING AND SIMULTANEOUSLY EVACUATING A SECTION OF PIPELINE, COMPRISING INSTALLING EXTERNALLY CONTROLLED PLUG STOPPING DEVICES IN THE WALL OF SAID PIPELING AT POINTS DEFINING THE UPSTREAM AND DOWNSTREAM EXTREMITIES OF SAID SECTION, INSTALLING AN AUXILLIARY, EXTERNALLY CONTROLLED PLUG STOPPING DEVICE IN THE WALL OF SAID PIPELINE AT A POINT ADJACENT TO BUT SPACED DOWNSTREAM FROM SAID UPSTREAM STOPPING DEVICE, INDEPENDENTLY INTRODUCING FIRST AND SECOND PORTABLE, RADIALLY EXPANDIBLE PLUGS INTO SAID PIPELINE ANTERIOR TO SAID UPSTREAM EXTREMITY SEQUENTIALLY TRANSPORTING SAID PLUGS THROUGH SAID PIPELINE BY MEANS OF THE FLUID FLOWING THEREIN, STOPPING SAID FIRST PLUG BY ACTUATING SAID AUXILIARY PLUG STOPPING DEVICE, STOPPING AND EXPANDING SAID SECOND PLUG AT THE UPSTREAM EXTREMITY OF SAID SECTION, RELEASING SAID FIRST PLUG FROM SAID AUXILIARY STOPPING DEVICE, INTRODUCING INTO SAID SECTION BEHIND SAID FIRST PLUG, AN INERT PRESSURE FLUID, TRANSPORTING SAID FIRST PLUG THROUGH SAID SECOND UNDER THE FORCE OF SAID INERT FLUID TO THEREBY EVACUATE THE FLUID IN ADVANCE THEREOF, STOPPING AND EXPANDING SAID FIRST PLUG AT THE DOWNSTREAM EXTREMITY OF SAID SECTION, AND RELEASING THE INERT FLUID FROM THE ISOLATED SECTION.
Claim 2
Independent Claim
182 words
A METHOD OF ISOLATING AND SIMULTANEOUSLY EVACUATING A SECTION OF PIPELINE, COMPRISING INSTALLING EXTERNALLY CONTROLLED PLUG STOPPING DEVICES IN THE WALL OF SAID PIPELING AT POINTS DEFINING THE UPSTREAM AND DOWNSTREAM EXTREMITIES OF SAID SECTION, INSTALLING AN AUXILLIARY, EXTERNALLY CONTROLLED PLUG STOPPING DEVICE IN THE WALL OF SAID PIPELINE AT A POINT ADJACENT TO BUT SPACED DOWNSTREAM FROM SAID UPSTREAM STOPPING DEVICE, INDEPENDENTLY INTRODUCING FIRST AND SECOND PORTABLE, RADIALLY EXPANDIBLE PLUGS INTO SAID PIPELINE ANTERIOR TO SAID UPSTREAM EXTREMITY SEQUENTIALLY TRANSPORTING SAID PLUGS THROUGH SAID PIPELINE BY MEANS OF THE FLUID FLOWING THEREIN, STOPPING SAID FIRST PLUG BY ACTUATING SAID AUXILIARY PLUG STOPPING DEVICE, STOPPING AND EXPANDING SAID SECOND PLUG AT THE UPSTREAM EXTREMITY OF SAID SECTION, RELEASING SAID FIRST PLUG FROM SAID AUXILIARY STOPPING DEVICE, INTRODUCING INTO SAID SECTION BEHIND SAID FIRST PLUG, AN INERT PRESSURE FLUID, TRANSPORTING SAID FIRST PLUG THROUGH SAID SECOND UNDER THE FORCE OF SAID INERT FLUID TO THEREBY EVACUATE THE FLUID IN ADVANCE THEREOF, STOPPING AND EXPANDING SAID FIRST PLUG AT THE DOWNSTREAM EXTREMITY OF SAID SECTION, AND RELEASING THE INERT FLUID FROM THE ISOLATED SECTION.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |