US2842338A
Expired / Lapsed
US
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Composition and method for plugging and consolidating
Assignee: Pan American Petroleum Corp
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Filing: 1956-05-17
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Granted: 1958-07-08
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Expires: 1976-05-17
Abstract
No abstract record available.
Inventors
- 👤 Robert W Davis
- 👤 James L Lummus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:22
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/56; C09K8/57; C09K8/575; C09K8/5751; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; C09K8/24; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
THE METHOD OF INCREASING THE DEGREE OF CONSOLIDATION AND DECREASING THE PERMEABILITY OF FORMATIONS PENETRATED BY A WELL COMPRISING DRILLING SAID WELL USING A DRILLING FLUID CONTAINING AT LEAST ABOUT W/4M POUNDS OF A WATER-SOLUBLE CALCIUM SALT PER BARREL OF DRILLING FLUID, WHERE W IS THE POUND MOLECULAR WEIGHT OF SAID SALT AND M IS THE NUMBER OF CALCIUM IONS PER MOLECULE OF SAID SALT, AND SUBSEQUENTLY INJECTING INTO SAID FORMATION AN AQUEOUS SOLUTION CONTAINING FROM ABOUT 5 TO ABOUT 50 PERCENT BY WEIGHT OF POLYACRYLIC ACID, SAID POLYACRYLIC ACID HAVING A MOLECULAR WEIGHT SUCH THAT A 10 PERCENT BY WEIGHT AQUEOUS SOLUTION THEREOF HAS A VISCOSITY IN THE RANGE OF BETWEEN ABOUT 5 AND ABOUT 200 CENTIPOISES.
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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |