US2933136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well treating method
Assignee: Dow Chemical Co
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Filing: 1957-04-04
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Granted: 1960-04-19
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Expires: 1977-04-04
Abstract
No abstract record available.
Inventors
- 👤 Earl D Ayers
- 👤 James W Rebbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:13
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; E21B33/00; E21B33/10; E21B33/13; E21B33/138; E21B43/26; E21B43/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD OF TREATING AN EARTH FORMATION PENETRATED BY THE BORE OF A WELL PROVIDED WITH THE USUAL CEMENTED CASING, SAID CASING HAVING PERFORATIONS AT A PLURALITY OF LEVELS OPPOSITE THE FORMATION TO BE TREATED, SAID METHOD COMPRISING THE STEPS OF INTRODUCING INTO THE WELL AND THENCE INTO THE EARTH FORMATION THROUGH THE SAID PERFORATIONS A PUMPABLE TREATING AGENT AND INJECTING INTO THE WELL ALONG WITH THE TREATING AGENT BALL-LIKE SEMI-OBTURATING ELEMENTS WHICH ARE LARGER IN DIAMETER THAN THE DIAMETER OF SAID PERFORATIONS AND HAVE A SPECIFIC GRAVITY SUCH THAT SAID ELEMENTS ARE CARRIED ALONG THE BORE BY SAID TREATING AGENT AND BECOME LODGED AGAINST THOSE PERFORATIONS TAKING A DISPROPORTIONATELY LARGE AMOUNT OF THE TREATILNG AGENT AND PARTLY OBTURATES EACH SUCH PERFORATION, THE SEMI-OBTURATING ELEMENTS EACH BEING PROVIDED WITH AN ARRAY OF DISCRETE TREATING AGENT FLOW PATHS SO DISPOSED THAT AT LEAST ONE FLOW PATH PROVIDES COMMUNICATION BETWEEN THE INTERIOR OF THE CASING AND THE PERFORATION REGARDLESS OF HOW THE SEMI-OBTURATING ELEMENT IS ORIENTED WITH RESPECT TO THE PERFORATION AGAINST WHICH IT IS LODGED, AND THEN INTRODUCING ADDITIONAL TREATING
Claim 2
Independent Claim
179 words
A METHOD OF TREATING AN EARTH FORMATION PENETRATED BY THE BORE OF A WELL PROVIDED WITH THE USUAL CEMENTED CASING, SAID CASING HAVING PERFORATIONS AT A PLURALITY OF LEVELS OPPOSITE THE FORMATION TO BE TREATED, SAID METHOD COMPRISING THE STEPS OF INTRODUCING INTO THE WELL AND THENCE INTO THE EARTH FORMATION THROUGH THE SAID PERFORATIONS A PUMPABLE TREATING AGENT AND INJECTING INTO THE WELL ALONG WITH THE TREATING AGENT BALL-LIKE SEMI-OBTURATING ELEMENTS WHICH ARE LARGER IN DIAMETER THAN THE DIAMETER OF SAID PERFORATIONS AND HAVE A SPECIFIC GRAVITY SUCH THAT SAID ELEMENTS ARE CARRIED ALONG THE BORE BY SAID TREATING AGENT AND BECOME LODGED AGAINST THOSE PERFORATIONS TAKING A DISPROPORTIONATELY LARGE AMOUNT OF THE TREATILNG AGENT AND PARTLY OBTURATES EACH SUCH PERFORATION, THE SEMI-OBTURATING ELEMENTS EACH BEING PROVIDED WITH AN ARRAY OF DISCRETE TREATING AGENT FLOW PATHS SO DISPOSED THAT AT LEAST ONE FLOW PATH PROVIDES COMMUNICATION BETWEEN THE INTERIOR OF THE CASING AND THE PERFORATION REGARDLESS OF HOW THE SEMI-OBTURATING ELEMENT IS ORIENTED WITH RESPECT TO THE PERFORATION AGAINST WHICH IT IS LODGED, AND THEN INTRODUCING ADDITIONAL TREATING
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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |