US3259185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of prolonging the usefulness of production wells in thermal-recovery procedures
Assignee: Mobil Oil AS
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Filing: 1958-10-27
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Granted: 1966-07-05
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Expires: 1978-10-27
Abstract
No abstract record available.
Inventors
- 👤 Charles F Gates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:43
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243; E21B36/00; E21B36/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE METHOD OF PROLONGING THE USEFULE LIFE OF A PRODUCTION WELL EMPLOYED TO WITHDRAW PETROLEUM FLUIDS FROM AN OIL SAND BEING OPERATED BY A PROCEDURE WHEREIN COMBUSTION OF COMBUSTIBLE MATERIAL IN SAID OIL SAND HAS BEEN INITIATED AND IS MAINTAINED BY INJECTION OF AN OXYGENBEARING GAS INTO SAID OIL SAND THROUGH AN INJECTION WELL AND PETROLEUM FLUIDS ENTER SAID PRODUCTION WELL FROM SAI D OIL SAND WHICH COMPRISES: CIRCULATING A COOLANT FLUID THROUGH SAID PRODUCTION WELL IN CONTACT WITH SAID PETROLEUM FLUIDS AT LEAST WHEN THE TEMPERATURE OF THE FLUIDS IN THE BOTTOM OF SAID PRODUCTION WELL REACHES THE GREATER OF THE TWO TEMPERATURES 200* F. AND THE TEMPERATURE 100* F. MORE THAN THE ORIGINAL TEMPERATURE OF THE OIL SAND, AND CONTROLLING THE VOLUME OF FLOW OF SAID COOLANT FLUID SO THAT THE TEMPERATURE IN SAID PRODUCTION WELL BOTTOM REMAINS LESS THAN THE IGINTION POINT OF THE COMBUSIBLE FLUIDS THEREIN.
Claim 2
Independent Claim
150 words
THE METHOD OF PROLONGING THE USEFULE LIFE OF A PRODUCTION WELL EMPLOYED TO WITHDRAW PETROLEUM FLUIDS FROM AN OIL SAND BEING OPERATED BY A PROCEDURE WHEREIN COMBUSTION OF COMBUSTIBLE MATERIAL IN SAID OIL SAND HAS BEEN INITIATED AND IS MAINTAINED BY INJECTION OF AN OXYGENBEARING GAS INTO SAID OIL SAND THROUGH AN INJECTION WELL AND PETROLEUM FLUIDS ENTER SAID PRODUCTION WELL FROM SAI D OIL SAND WHICH COMPRISES: CIRCULATING A COOLANT FLUID THROUGH SAID PRODUCTION WELL IN CONTACT WITH SAID PETROLEUM FLUIDS AT LEAST WHEN THE TEMPERATURE OF THE FLUIDS IN THE BOTTOM OF SAID PRODUCTION WELL REACHES THE GREATER OF THE TWO TEMPERATURES 200* F. AND THE TEMPERATURE 100* F. MORE THAN THE ORIGINAL TEMPERATURE OF THE OIL SAND, AND CONTROLLING THE VOLUME OF FLOW OF SAID COOLANT FLUID SO THAT THE TEMPERATURE IN SAID PRODUCTION WELL BOTTOM REMAINS LESS THAN THE IGINTION POINT OF THE COMBUSIBLE FLUIDS THEREIN.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |