US3298438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing corrosion
Assignee: Atlantic Richfield Co
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Filing: 1961-02-20
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Granted: 1967-01-17
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Expires: 1981-02-20
Abstract
No abstract record available.
Inventors
- 👤 Donald R Anthony
- 👤 Rado G Loncaric
- 👤 Robert E Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:36
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; Y; Y10; Y10S; Y10S166/00; Y10S166/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A METHOD OF INJECTION LIQUEFIED NORMALLY GASEOUS CORROSION INHIBITOR INTO THE VAPOR SPACE OF THE ANNULUS OF A WELL WHEN THE GASES IN SAID VAPOR SPACE CONTAIN CARBON DIOXIDE WHICH METHOD COMPRISES CONNECTING AN INHIBITOR INJECTION SYSTEM TO AN INLET TO SAID VAPOR SPACE, PUMPING A FIRST AMOUNT OF WATER-MISCIBLE LIQUID INTO SAID INHIBITOR INJECTION SYSTEM, SAID FIRST AMOUNT OF SAID WATER-MISCIBLE LIQUID BEING AT LEAST SUFFICIENT TO REMOVE WATER FROM SAID INHIBITOR INJECTION SYSTEM AND SAID INLET, COOLING A LIQUEFIED NORMALLY GSEOUS CORROSION INHIBITOR TO A TEMPERATURE SUFFICIENT TO PREVENT VAPORIZATION OF SAID INHIBITOR IN SAID INJECTION SYSTEM, SAID LIQUEFIED NORMALLY GASEOUS CORROSION INHIBITOR CHARACTERIZED BY THE FACT THAT SAID INHIBITOR WILL REACT WITH CARBON DIOXIDE ND WATER TO FORM A SOLID SALLLT, PUMPING THROUGH SAID INHIBITOR INJECTION SYSTEM A PREDETERMINED AMOUNT OF SAID INHIBITOR, SAID INHIBITOR CONTACTING SAID FIRST AMOUNT OF WATER-MISCIBLE FLUID IN SAID INJECTION SYSTEM, AND PUMPING THROUGH SAID INHIBITOR INJECTION SYSTEM THENCE TO SAID INLET AND TO SAID VAPOR SPACE A SECOND AMOUNT OF WATER-MISCIBLE LIQUID, SAID SECOND AMOUNT CONTACTING SAID INHIBITOR AND BEING SUFFICIENT TO DISPLACE SAID INHIBITOR FROM SAID INHIBITOR INJECTION SYSTEM AND FROM SAID INLET INTO SAID VAPOR SPACE.
Claim 2
Independent Claim
197 words
A METHOD OF INJECTION LIQUEFIED NORMALLY GASEOUS CORROSION INHIBITOR INTO THE VAPOR SPACE OF THE ANNULUS OF A WELL WHEN THE GASES IN SAID VAPOR SPACE CONTAIN CARBON DIOXIDE WHICH METHOD COMPRISES CONNECTING AN INHIBITOR INJECTION SYSTEM TO AN INLET TO SAID VAPOR SPACE, PUMPING A FIRST AMOUNT OF WATER-MISCIBLE LIQUID INTO SAID INHIBITOR INJECTION SYSTEM, SAID FIRST AMOUNT OF SAID WATER-MISCIBLE LIQUID BEING AT LEAST SUFFICIENT TO REMOVE WATER FROM SAID INHIBITOR INJECTION SYSTEM AND SAID INLET, COOLING A LIQUEFIED NORMALLY GSEOUS CORROSION INHIBITOR TO A TEMPERATURE SUFFICIENT TO PREVENT VAPORIZATION OF SAID INHIBITOR IN SAID INJECTION SYSTEM, SAID LIQUEFIED NORMALLY GASEOUS CORROSION INHIBITOR CHARACTERIZED BY THE FACT THAT SAID INHIBITOR WILL REACT WITH CARBON DIOXIDE ND WATER TO FORM A SOLID SALLLT, PUMPING THROUGH SAID INHIBITOR INJECTION SYSTEM A PREDETERMINED AMOUNT OF SAID INHIBITOR, SAID INHIBITOR CONTACTING SAID FIRST AMOUNT OF WATER-MISCIBLE FLUID IN SAID INJECTION SYSTEM, AND PUMPING THROUGH SAID INHIBITOR INJECTION SYSTEM THENCE TO SAID INLET AND TO SAID VAPOR SPACE A SECOND AMOUNT OF WATER-MISCIBLE LIQUID, SAID SECOND AMOUNT CONTACTING SAID INHIBITOR AND BEING SUFFICIENT TO DISPLACE SAID INHIBITOR FROM SAID INHIBITOR INJECTION SYSTEM AND FROM SAID INLET INTO SAID VAPOR SPACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |