US3312281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil production with steam
Assignee: Phillips Petroleum Co
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Filing: 1964-06-04
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Granted: 1967-04-04
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Expires: 1984-06-04
Abstract
No abstract record available.
Inventors
- 👤 William B Belknap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:30
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
APPARATUS FOR ALTERNATELY INJECTING STEAM THRU A WELL INTO AN OIL-BEARING SUBTERRANEAN STRATUM AND STEAM LIFTING OIL PRODUCED BY THE STEAM INJECTION COMPRISING IN COMBINATION: (A) CONCENTRIC CASING AND TUBING STRINGS CONNECTING A WELL HEAD WITH SAID STRATUM PROVIDING AN ANNULUS THEREBETWEEN; (B) A GAS LIFT VALVE POSITIONED AT EACH OF SEVERAL LEVELS IN SAID TUBING STRING FOR INJECTING STEAM INTO SAID TUBING FROM SAID ANNULUS; (C) A STEAM GENERATOR AT GROUND LEVEL ADJACENT SAID WELL HEAD; (D) CONDUIT MEANS FOR PASSING STEAM FROM SAID GENERATOR TO SAID TUBING STRING AND TO SAID ANNULUS; (E) VALVE MEANS IN SAID CONDUIT MEANS FOR ALTERNATELY SEPARATELY PASSING STEAM TO SAID ANNULUS AND TO SAID TUBING STRING; AND (F) MEANS FOR PASSING PRODUCED OIL FROM SAID TUBING STRING TO A PRODUCTION LINE WHEN STEAM IS BEING INJECTED INTO SAID ANNULUS.
Claim 2
Dependent Claim
179 words
A PROCESS FOR PRODUCING OIL FROM AN OIL-BEARING STRATUM THRU A WELL THEREIN PROVIDED WITH A CASING AND A TUBING STRING, WHICH COMPRISES THE STEPS OF: (A) PROVIDING SAID TUBING STRING WITH GAS LIFT VALVES AT SELECTED SPACED-APART LEVELS BEGINNING NEAR THE LEVEL OF SAID STRATUM AND INJECTING SUPERHEATED STEAM AT HIGH PRESSURE FROM A STEAM GENERATOR INTO SAID STRATUM THRU SAID TUBING STRING FOR AN EXTENDED PERIOD SO AS TO CAUSE HOT OIL TO FLOW INTO SAID WELL FROM THE SURROUNDING STRATUM; (B) THEREAFTER, TERMINATING THE INJECTION OF STEAM THRU SAID TUBING STRING AND INJECTING STEAM FROM SAID GENERATOR INTO THE ANNULUS FORMED BY SAID TUBING AND CASING; (C) INJECTING STEAM AT SUBSTANTIALLY LESS PRESSURE THAN IN STEP (A) FROM SAID ANNULUS THRU SAID GAS LIFT VALVES INTO SAID TUBING STRING PROGRESSIVELY AT A SERIES OF DIFFERENT LEVELS THEREIN BEGINNING AT THE LOWERMOST AS THE LIQUID OIL PASSES EACH LEVEL SO AS TO LIFT SAID OIL THRU SAID TUBING WHILE MAINTAINING SAID TUBING OPEN TO FLOW TO A PRODUCTION LINE; AND (D) REPEATING STEPS (A), (B), AND (C).
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |