Patent US3157232A successfully refreshed from Google Patents.
US3157232A
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Method of acidizing wells
Assignee: Halliburton Co
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Filing: 1961-06-19
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Granted: 1964-11-17
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Expires: 1981-06-19
Abstract
No abstract record available.
Inventors
- 👤 Ramos Joseph
- 👤 Jr Homer Charles Mclaughlin
- 👤 Ronney R Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:35
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF ACIDIZING OIL-BEARING EARTHEN FORMATIONS TO INCREASE THE PRODUCTIVITY THEREOF WHICH COMPRISES CHARGING A F ORMALDEHYDE SOLUTION INTO A WELL AS A FIRST REACTANT, AND, AS A SECOND REACTANT, AN AMMONIUM SALT SOLUTION CAPABLE OF REACTNG WITH THE FIRST REACTANT TO FROMA A FREE ACID, CONTACTING THE FIRST REACTANT WITH THE SECOND REACTANT THEREBY FORMING THE FREE ACID, AND DIRECTING THE ACID FORMED INTO AND THROUGHOUT THE OIL-BEARING EARTHEN FORMATION.
Claim 2
Independent Claim
72 words
A METHOD OF ACIDIZING OIL-BEARING EARTHEN FORMATIONS TO INCREASE THE PRODUCTIVITY THEREOF WHICH COMPRISES CHARGING A F ORMALDEHYDE SOLUTION INTO A WELL AS A FIRST REACTANT, AND, AS A SECOND REACTANT, AN AMMONIUM SALT SOLUTION CAPABLE OF REACTNG WITH THE FIRST REACTANT TO FROMA A FREE ACID, CONTACTING THE FIRST REACTANT WITH THE SECOND REACTANT THEREBY FORMING THE FREE ACID, AND DIRECTING THE ACID FORMED INTO AND THROUGHOUT THE OIL-BEARING EARTHEN FORMATION.
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |