US3061009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovery from fossil fuel bearing strata
Assignee: Svenska Skifferolje AB
•
Filing: 1958-01-17
•
Granted: 1962-10-30
•
Expires: 1978-01-17
Abstract
No abstract record available.
Inventors
- 👤 William J Shirley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:04
CPC Classifications
E; E21; E21B; E21B36/00; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A METHOD FOR PREVENTING OF TAR CLOGGING IN PRODUCT OUTLETS AND PRODUCT LINES IN RECOVERY OF OIL FROM FUELCONTAINING STRATA BY HEATING IN A BOREHOLE IN SITU IN SAID STRATA WHICH BOREHOLE CONTAINS WATER COLLECTED FROM THE FORMATION, WHICH CONSISTS ESSENTIALLY IN INTRODUCING HYDROCARBON OIL LIQUID UNDER PRESSURE INTO THE BOREHOLE SUFFICIENT TO REPLACE THE WATER IN THE BOREHOLE WITH HYDROCARBON OIL LIQUID INTRODUCED, AND TO DRIVE THE WATER BACK INTO THE FORMATION, HEATING THE STRATA THROUGH THE BOREHOLE UP TO DISTILLATION TEMPERATURE IN THE PRESENCE
Claim 2
Independent Claim
86 words
A METHOD FOR PREVENTING OF TAR CLOGGING IN PRODUCT OUTLETS AND PRODUCT LINES IN RECOVERY OF OIL FROM FUELCONTAINING STRATA BY HEATING IN A BOREHOLE IN SITU IN SAID STRATA WHICH BOREHOLE CONTAINS WATER COLLECTED FROM THE FORMATION, WHICH CONSISTS ESSENTIALLY IN INTRODUCING HYDROCARBON OIL LIQUID UNDER PRESSURE INTO THE BOREHOLE SUFFICIENT TO REPLACE THE WATER IN THE BOREHOLE WITH HYDROCARBON OIL LIQUID INTRODUCED, AND TO DRIVE THE WATER BACK INTO THE FORMATION, HEATING THE STRATA THROUGH THE BOREHOLE UP TO DISTILLATION TEMPERATURE IN THE PRESENCE
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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |