Patent US3140744A successfully refreshed from Google Patents.
US3140744A
Expired / Lapsed
US
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Oil well heater
Assignee: Variperm Co
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Filing: 1961-05-29
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Granted: 1964-07-14
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Florent H Bailly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:47
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A HEATER INSERTABLE INTO AN UNDERGROUND OIL-BEARING STRATUM THROUGH AN OIL WELL CASING COMPRISING AN UPPER MANIFOLD, A LOWER MANIFOLD, A PLURALITY OF VERTICAL FLUID CIRCULATING TUBES EXTENDING BETWEEN THE MANIFOLDS AND FLUIDLY COMMUNICATING WITH THE MANIFOLDS FOR CIRCULATION OF FLUID BETWEEN THE MANIFOLDS, SAID TUBES BEING DISPOSED ABOUT A VERTICAL AXIS OF THE HEATER, ARCUATE PERMEABLE CONCRETE SHELL SECTIONS DISPOSED BETWEEN THE TUBES AND EXTENDING BETWEEN THE MANIFOLDS AND THE TUBES TO DEFINE A CENTRAL LONGITUDINAL CAVITY AXIALLY OF THE HEATER EXTENDING FROM THE UPPER MANIFOLD TO THE LOWER MANIFOLD, AN OIL CONDUCTOR PIPE, MEANS FOR CONNECTING THE OIL CONDUCTOR PIPE TO THE HEATER FOR FLUID FLOW COMMUNICATION WITH THE CAVITY, MEANS FOR CONNECTING THE UPPER MANIFOLD TO A SOURCE OF HEATED FLUID, AND MEANS FOR CONNECTING THE UPPER MANIFOLD TO HEATED FLUID OUTLET MEANS.
Claim 2
Dependent Claim
136 words
A HEATER INSERTABLE INTO AN UNDERGROUND OIL-BEARING STRATUM THROUGH AN OIL WELL CASING COMPRISING AN UPPER MANIFOLD, A LOWER MANIFOLD, A PLURALITY OF VERTICAL FLUID CIRCULATING TUBES EXTENDING BETWEEN THE MANIFOLDS AND FLUIDLY COMMUNICATING WITH THE MANIFOLDS FOR CIRCULATION OF FLUID BETWEEN THE MANIFOLDS, SAID TUBES BEING DISPOSED ABOUT A VERTICAL AXIS OF THE HEATER, ARCUATE PERMEABLE CONCRETE SHELL SECTIONS DISPOSED BETWEEN THE TUBES AND EXTENDING BETWEEN THE MANIFOLDS AND THE TUBES TO DEFINE A CENTRAL LONGITUDINAL CAVITY AXIALLY OF THE HEATER EXTENDING FROM THE UPPER MANIFOLD TO THE LOWER MANIFOLD, AN OIL CONDUCTOR PIPE, MEANS FOR CONNECTING THE OIL CONDUCTOR PIPE TO THE HEATER FOR FLUID FLOW COMMUNICATION WITH THE CAVITY, MEANS FOR CONNECTING THE UPPER MANIFOLD TO A SOURCE OF HEATED FLUID, AND MEANS FOR CONNECTING THE UPPER MANIFOLD TO HEATED FLUID OUTLET MEANS.
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) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |