US2843206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for reducing corrosion in oil wells
Assignee: Gulf Oil Corp
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Filing: 1956-10-23
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Granted: 1958-07-15
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Expires: 1976-10-23
Abstract
No abstract record available.
Inventors
- 👤 John F Mcnamara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:37
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN THE OPERATION OF WELL PRODUCING BOTH OIL AND WATER AND HAVING A HIGH RATIO OF WATER TO OIL, THE SAID WELL COMPRISING AN OUTER CASING, AN INNER TUBING AND A LEAD LINE EXTENDING FROM THE UPPER PORTION THEREOF, A PUMP LOCATED WITHIN THE TUBING TO PUMP THE OIL AND WATER UPWARD THERETHROUGH, AND AN ANNULAR SPACE BETWEEN CASING AND TUBING, THE METHOD OF REDUCING CORROSION WHICH COMPRISES: CONTINUOUSLY WITHDRAWING FROM THE UPPER PART OF THE LEAD LINE A SMALL STREAM OF OIL AT A VELOCITY LOW ENOUGH TO EFFECT GRAVITY SEPARATION OF SAID OIL FROM ACCOMPANYING WATER; INTRODUCING A SMALL PROPORTION OF CORROSION INHIBITOR INTO THE WITHDRAWN OIL; CONTINUOUSLY INTRODUCING THE MIXTURE OF WITHDRAWN OIL AND CORROSION INHIBITOR INTO THE SAID ANNULAR SPACE AND CAUSING IT TO FLOW DOWNWARD THERIN TO THE BOTTOM OF THE TUBING AND PUMPING THE SAME UPWARD THERETHROUGH TO THE LEAD LINE IN COMPANY WITH NEWLY-PRODUCED OIL ND WATER.
Claim 2
Dependent Claim
154 words
IN THE OPERATION OF WELL PRODUCING BOTH OIL AND WATER AND HAVING A HIGH RATIO OF WATER TO OIL, THE SAID WELL COMPRISING AN OUTER CASING, AN INNER TUBING AND A LEAD LINE EXTENDING FROM THE UPPER PORTION THEREOF, A PUMP LOCATED WITHIN THE TUBING TO PUMP THE OIL AND WATER UPWARD THERETHROUGH, AND AN ANNULAR SPACE BETWEEN CASING AND TUBING, THE METHOD OF REDUCING CORROSION WHICH COMPRISES: CONTINUOUSLY WITHDRAWING FROM THE UPPER PART OF THE LEAD LINE A SMALL STREAM OF OIL AT A VELOCITY LOW ENOUGH TO EFFECT GRAVITY SEPARATION OF SAID OIL FROM ACCOMPANYING WATER; INTRODUCING A SMALL PROPORTION OF CORROSION INHIBITOR INTO THE WITHDRAWN OIL; CONTINUOUSLY INTRODUCING THE MIXTURE OF WITHDRAWN OIL AND CORROSION INHIBITOR INTO THE SAID ANNULAR SPACE AND CAUSING IT TO FLOW DOWNWARD THERIN TO THE BOTTOM OF THE TUBING AND PUMPING THE SAME UPWARD THERETHROUGH TO THE LEAD LINE IN COMPANY WITH NEWLY-PRODUCED OIL ND WATER.
References Cited (Backward Citations)
US2688368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |