Patent US2648522A successfully refreshed from Google Patents.
US2648522A
Expired / Lapsed
US
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Method of recovering lost circulation in wells
Assignee: Individual
•
Filing: 1951-04-24
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Granted: 1953-08-11
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Expires: 1971-04-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Armentrout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:33
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/003; Y; Y10; Y10S; Y10S106/00; Y10S106/01; Y10S106/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE METHOD OF RECOVERING CIRCULATION WHICH HAS BEEN LOST IN THE COURSE OF DRILLING A WELL WHICH COMPRISES INTRODUCING INTO THE CIRCULATION FLUID SUCCESSIVE SLUGS OF SCREENED GRAVEL WHICH SLUGS ARE OF PROGRESSIVELY DECREASING PARTICLE SIZE AND EACH OF WHICH HAS MIXED THEREWITH A SEALING COMPOSITION COMPRISING AN AQUEOUS MIXTURE CONTAINING SUBSTANTIAL AMOUNTS OF COARSE GROUND, DRIED, BENTONITE CLAY, EXPANDED PERLITE, AND A FINELY DIVIDED SILICIOUS MATERIAL WHEREBY THE LARGER GRAVEL PARTICLES IN THE SLUGS FIRST TO BE INTRODUCED MAY LODGE IN CRACKS OR CREVICES IN WHICH THE CIRCULATION IS BEING LOST AND FORM A FRAMEWORK ON WHICH THE SMALLER PARTICLES MAY DEPOSIT AND THE SEALING COMPOSITION MAY OCCUPY THE SPACES BETWEEN THE PARTICLES AND DUE TO THE CONTINUED EXPANSION OF THE BENTONITE CLAY BY ITS ABSORPTION OF WATER AFTER IT HAS COME TO REST BETWEEN THE PARTICLES THE ENTIRE MASS MAY BE LOCKED IN PLACE.
Claim 2
Independent Claim
146 words
THE METHOD OF RECOVERING CIRCULATION WHICH HAS BEEN LOST IN THE COURSE OF DRILLING A WELL WHICH COMPRISES INTRODUCING INTO THE CIRCULATION FLUID SUCCESSIVE SLUGS OF SCREENED GRAVEL WHICH SLUGS ARE OF PROGRESSIVELY DECREASING PARTICLE SIZE AND EACH OF WHICH HAS MIXED THEREWITH A SEALING COMPOSITION COMPRISING AN AQUEOUS MIXTURE CONTAINING SUBSTANTIAL AMOUNTS OF COARSE GROUND, DRIED, BENTONITE CLAY, EXPANDED PERLITE, AND A FINELY DIVIDED SILICIOUS MATERIAL WHEREBY THE LARGER GRAVEL PARTICLES IN THE SLUGS FIRST TO BE INTRODUCED MAY LODGE IN CRACKS OR CREVICES IN WHICH THE CIRCULATION IS BEING LOST AND FORM A FRAMEWORK ON WHICH THE SMALLER PARTICLES MAY DEPOSIT AND THE SEALING COMPOSITION MAY OCCUPY THE SPACES BETWEEN THE PARTICLES AND DUE TO THE CONTINUED EXPANSION OF THE BENTONITE CLAY BY ITS ABSORPTION OF WATER AFTER IT HAS COME TO REST BETWEEN THE PARTICLES THE ENTIRE MASS MAY BE LOCKED IN PLACE.
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |