US3385359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing hydrocarbons from a subsurface formation by thermal treatment
Assignee: Shell USA Inc
•
Filing: 1966-09-29
•
Granted: 1968-05-28
•
Expires: 1986-09-29
Abstract
No abstract record available.
Inventors
- 👤 Offeringa Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:11
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
METHOD OF PRODUCING HYDROCARBONS FROM A SUBSURFACE TAR SAND FORMATION CONTAINING IMMOBILE HYDROCARBONS IN WHICH AT LEAST ONE WELL PENETRATES, COMPRISING: (A) INJECTING ONLY HOT WATER INTO THE FORMATION THROUGH A WELL PENETRATING THE FORMATION; (B) INTERRUPTING THE INJECTION OF THE HOT WATER; (C) THEREAFTER INJECTING STEAM INTO THE FORMATION THROUGH THE SAME WELL; (D) INTERRUPTING THE INJECTION OF THE HOT CONDENSABLE VAPOR; AND
Claim 2
Dependent Claim
64 words
METHOD OF PRODUCING HYDROCARBONS FROM A SUBSURFACE TAR SAND FORMATION CONTAINING IMMOBILE HYDROCARBONS IN WHICH AT LEAST ONE WELL PENETRATES, COMPRISING: (A) INJECTING ONLY HOT WATER INTO THE FORMATION THROUGH A WELL PENETRATING THE FORMATION; (B) INTERRUPTING THE INJECTION OF THE HOT WATER; (C) THEREAFTER INJECTING STEAM INTO THE FORMATION THROUGH THE SAME WELL; (D) INTERRUPTING THE INJECTION OF THE HOT CONDENSABLE VAPOR; AND
References Cited (Backward Citations)
US3126961A
Cited
US2862558A
Cited
US2909224A
Cited
US3266569A
Cited
US3288214A
Cited
US3259186A
Cited
US3221813A
Cited
US3349849A
Cited
US3351132A
Cited
US3292702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |