Patent US3208521A successfully refreshed from Google Patents.
US3208521A
Expired / Lapsed
US
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Recompletion of wells
Assignee: ExxonMobil Upstream Research Co
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Filing: 1963-08-09
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Granted: 1965-09-28
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Expires: 1983-08-09
Abstract
No abstract record available.
Inventors
- 👤 Warren E Holland
- 👤 Charles L Prokop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:48
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF FORMING A PLUG IN A WELL PIPE COMPRISING THE FOLLOWING STEPS: ANCHORING A SUPPORT MEMBER AT A GIVEN LEVEL IN THE PIPE; DEPOSITING A QUANTITY OF A LIQUID CEMENTITIOUS MIXTURE ON THE SUPPORT MEMBER; INSERTING A CONDUCTIVE METAL ROD IN THE CEMENTITIOUS MIXTURE SO THAT THE ROD EXTENDS SUBSTANTIALLY THROUGH THE CEMENTITIOUS MIXTURE AND IS SUBSTANTIALLY CENTRALLY LOCATED ON THE LONGITUDINAL AXIS OF THE WELL PIPE; AFTER THE CEMENTITIOUS MIXTURE HAS HARDENED FOR A PERIOD OF AT LEAST 2 HOURS, PASSING AN ELECTRICAL DIRECT CURRENT FROM THE WELL PIPE TO THE ROD THROUGH THE HARDENED CEMENTITIOUS MIXTURE UNTIL THERE HAS PASSED AT LEAST 50 COULOMBS OF ELECTRICITY PER SQUARE INCH OF CONTACT BETWEEN THE PIPE AND THE CEMENTITIOUS MIXTURE.
Claim 2
Independent Claim
122 words
A METHOD OF FORMING A PLUG IN A WELL PIPE COMPRISING THE FOLLOWING STEPS: ANCHORING A SUPPORT MEMBER AT A GIVEN LEVEL IN THE PIPE; DEPOSITING A QUANTITY OF A LIQUID CEMENTITIOUS MIXTURE ON THE SUPPORT MEMBER; INSERTING A CONDUCTIVE METAL ROD IN THE CEMENTITIOUS MIXTURE SO THAT THE ROD EXTENDS SUBSTANTIALLY THROUGH THE CEMENTITIOUS MIXTURE AND IS SUBSTANTIALLY CENTRALLY LOCATED ON THE LONGITUDINAL AXIS OF THE WELL PIPE; AFTER THE CEMENTITIOUS MIXTURE HAS HARDENED FOR A PERIOD OF AT LEAST 2 HOURS, PASSING AN ELECTRICAL DIRECT CURRENT FROM THE WELL PIPE TO THE ROD THROUGH THE HARDENED CEMENTITIOUS MIXTURE UNTIL THERE HAS PASSED AT LEAST 50 COULOMBS OF ELECTRICITY PER SQUARE INCH OF CONTACT BETWEEN THE PIPE AND THE CEMENTITIOUS MIXTURE.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |