US2889880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing hydrocarbons
Assignee: Gulf Oil Corp
•
Filing: 1955-08-29
•
Granted: 1959-06-09
•
Expires: 1975-08-29
Abstract
No abstract record available.
Inventors
- 👤 Richard V Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:43
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF EXTRACTING OIL FROM AN UNDERGROUND RESERVOIR CONTAINING GRAVITY-SEGREGATED GAS, OIL AND WATER AND HAVING A GAS-OIL CONTACT SURFACE AND AN UNDERLYING OIL-WATER CONTACT SURFACE WHICH COMPRISES PROVIDING A WELL WHICH PENETRATES THE RESERVOIR TO BELOW THE OIL-WATER CONTACT, PROVIDING A FIRST FLOW CHANNEL BETWEEN THE SURFACE OF THE GROUND AND A ZONE OF THE WELL IN THE RESERVOIR ABOVE THE GAS-OIL CONTACT, PROVIDING A SECOND SEPARATE FLOW CHANNEL BETWEEN THE SURFACE OF THE GROUND AND A ZONE OF THE WELL IN THE SAME RESERVOIR INTERMEDIATE THE GAS-OIL CONTACT AND THE WATER-OIL CONTACT, PROVIDING A THIRD SEPARATE FLOW CHANNEL BETWEEN THE SURFACE OF THE GROUND
Claim 2
Independent Claim
107 words
A METHOD OF EXTRACTING OIL FROM AN UNDERGROUND RESERVOIR CONTAINING GRAVITY-SEGREGATED GAS, OIL AND WATER AND HAVING A GAS-OIL CONTACT SURFACE AND AN UNDERLYING OIL-WATER CONTACT SURFACE WHICH COMPRISES PROVIDING A WELL WHICH PENETRATES THE RESERVOIR TO BELOW THE OIL-WATER CONTACT, PROVIDING A FIRST FLOW CHANNEL BETWEEN THE SURFACE OF THE GROUND AND A ZONE OF THE WELL IN THE RESERVOIR ABOVE THE GAS-OIL CONTACT, PROVIDING A SECOND SEPARATE FLOW CHANNEL BETWEEN THE SURFACE OF THE GROUND AND A ZONE OF THE WELL IN THE SAME RESERVOIR INTERMEDIATE THE GAS-OIL CONTACT AND THE WATER-OIL CONTACT, PROVIDING A THIRD SEPARATE FLOW CHANNEL BETWEEN THE SURFACE OF THE GROUND
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) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |