US2743779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cementing wells
Assignee: Individual
•
Filing: 1951-04-28
•
Granted: 1956-05-01
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Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:42
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF FORMING A CEMENT PLUG FOR SEALING OFF A SUB-SURFACE FORMATION WITHIN A WELL BORE HAVING A STANDING FLUID COLUMN THEREIN INCLUDING, INTRODUCING CEMENT INTO THE WELL BORE BELOW THE FORMATION AND DIRECTING SAID CEMENT INTO THE SUB-SURFACE FORMATION SURROUNDING THE BORE, THEN REDUCING THE PRESSURE OF THE STANDING FLUID COLUMN ON THE CEMENT BY LIFTING A PORTION OF THE FLUID COLUMN ABOVE THE CEMENT UPWARDLY WITHIN THE WELL BORE TO PERMIT THE FORMATION PRESSURE TO PARTIALLY DISPLACE THE CEMENT BACK TOWARD THE WELL BORE TO CONSOLIDATE THE CEMENT INTO A SOLID PLUG, AND THEREAFTER MAINTAINING THE PRESSURE CONDITIONS OF THE FORMATION AND THE REMAINDER OF THE FLUID COLUMN IN EQUILIBRIUM AND CONSTANT UNTIL THE CEMENT HAS SET.
Claim 2
Independent Claim
120 words
THE METHOD OF FORMING A CEMENT PLUG FOR SEALING OFF A SUB-SURFACE FORMATION WITHIN A WELL BORE HAVING A STANDING FLUID COLUMN THEREIN INCLUDING, INTRODUCING CEMENT INTO THE WELL BORE BELOW THE FORMATION AND DIRECTING SAID CEMENT INTO THE SUB-SURFACE FORMATION SURROUNDING THE BORE, THEN REDUCING THE PRESSURE OF THE STANDING FLUID COLUMN ON THE CEMENT BY LIFTING A PORTION OF THE FLUID COLUMN ABOVE THE CEMENT UPWARDLY WITHIN THE WELL BORE TO PERMIT THE FORMATION PRESSURE TO PARTIALLY DISPLACE THE CEMENT BACK TOWARD THE WELL BORE TO CONSOLIDATE THE CEMENT INTO A SOLID PLUG, AND THEREAFTER MAINTAINING THE PRESSURE CONDITIONS OF THE FORMATION AND THE REMAINDER OF THE FLUID COLUMN IN EQUILIBRIUM AND CONSTANT UNTIL THE CEMENT HAS SET.
References Cited (Backward Citations)
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US1758156A
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US2079517A
Cited
US2268010A
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US2368424A
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US2293904A
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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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |