US2929451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for freeing of and preventing formation of paraffin and asphaltand like obstructions in oil wells, natural gas wells and the like
Assignee: Individual
•
Filing: 1957-01-03
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Granted: 1960-03-22
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Expires: 1977-01-03
Abstract
No abstract record available.
Inventors
- 👤 Frank J Hurlstone
- 👤 Harry A Musham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:31
CPC Classifications
E; E21; E21B; E21B36/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
THE METHOD OF MAINTAINING THE UPWARDLY DISCHARGING OIL OF AN OIL WELL AT SUCH A TEMPERATURE AS WILL PREVENT SOLIDIFICATION OF HYDROCARBON PARTICLES IN THE OIL AND ACCOMPANYING OBSTRUCTION OF THE OIL DISCHARGE, WHICH COMPRISES, HEATING A FLUID TO THE MELTING TEMPERATURE OF THE HYDROCARBON PARTICLES, SIMULTANEOUSLY CIRCULATING THE HEATED FLUID DOWNWARDLY THROUGH TWO CONCENTRIC PATHS AND THROUGHOUT THE UPRIGHT EXTENT OF THE DISCHARGING OIL ALONG WHICH SOLIDIFICATION OF SUCH PARTICLES MAY OCCUR, AND DISCHARGING THE OIL AND MELTED HYDROCARBON MATERIAL UPWARDLY BETWEEN THE CONCENTRIC STREAMS OF HEATED FLUID, WHEREBY TO PREVENT SOLIDIFICATION OF THE HYDROCARBON MATERIAL THROUGHOUT THE UPRIGHT EXTENT OF THE DISCHARGING
References Cited (Backward Citations)
US1565574A
Cited
US2341573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |