US3270812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programming
Assignee: Phillips Petroleum Co
•
Filing: 1962-02-16
•
Granted: 1966-09-06
•
Expires: 1982-02-16
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Gilchrist
- 👤 Richard H Langenheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:33
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0688; E; E21; E21B; E21B43/00; E21B43/16; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A METHOD FOR MISCIBLE DISPLACEMENT OF A FLUID FROM AN UNDERGROUND RESERVOIR PENETRATED BY AN INJECTION WELL AND A PRODUCTION WELL COMPRISING THE STEPS OF: INJECTING A FIRST DISPLACEMENT FLUID INTO SAID INJECTION WELL; ALTERNATELY INJECTING A SECOND DISPLACEMENT FLUID; GENERATING A PLURALITY OF CONSTANT INTERVAL ELECTRICAL PULSES; COUNTING SAID PULSES AND ACTUATING A SWITCHING RELAY ONCE FOR A FIRST PREDETERMINED NUMBER OF SAID PULSES TO CHANGE FROM ONE OF SAID DISPLACING FLUIDS TO THE OTHER; AND COUNTING SAID PULSES AND ACTUATING SAID RELAY ONCE FOR A SECOND PREDETERMINED NUMBER OF SAID PULSES TO CHANGE BACK TO SAID ONE FLUID.
References Cited (Backward Citations)
US2994814A
Cited
US2503901A
Cited
US2496779A
Cited
US2867277A
Cited
US2927637A
Cited
US2911156A
Cited
US3036229A
Cited
US3103972A
Cited
US2962610A
Cited
US3030015A
Cited
US3198967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |