US3880765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterflood process using alkoxylated low molecular weight acrylic acid polymers as scale inhibitors
Assignee: ChampionX LLC
•
Filing: 1973-11-12
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Granted: 1975-04-29
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Expires: 1993-11-12
Abstract
Abstract Low molecular weight alkoxylated acrylic acid polymers are introduced into one or more water injection wells and forced through the underground formation to a producing well or wells without being destroyed during such passage.
Inventors
- 👤 James D Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C09; C09K; C09K8/00; C09K8/52; C09K8/528; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
IN A WATERFLOOD SYSTEM IN WHICH WATER IS ADDED TO ONE OR MORE INJECTION WELLS IN ORDER TO FORCE OIL FROM UNDERGROUND FORMATIONS TO ONE OR MORE PRODUCING WELLS, THE PROCESS WHICH COMPRISES INTRODUCING INTO AT LEAST ONE OF SAID INJECTION WELLS A WATER FLOODING COMPOSITION CONTAINING A SCALE INHIBITING AMOUNT OF AN ALKOXYLATED WATER-SOLUBLE ACRYLIC ACID POLYMER HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF 3,000 TO 20,000, SAID ACRYLIC ACID POLYMER BEING ALKOXYLATED WITH FROM 2-60% BY WEIGHT OF ETHYLENE OXIDE OR PROPYLENE OXIDE.
Claim 2
Dependent Claim
86 words
IN A WATERFLOOD SYSTEM IN WHICH WATER IS ADDED TO ONE OR MORE INJECTION WELLS IN ORDER TO FORCE OIL FROM UNDERGROUND FORMATIONS TO ONE OR MORE PRODUCING WELLS, THE PROCESS WHICH COMPRISES INTRODUCING INTO AT LEAST ONE OF SAID INJECTION WELLS A WATER FLOODING COMPOSITION CONTAINING A SCALE INHIBITING AMOUNT OF AN ALKOXYLATED WATER-SOLUBLE ACRYLIC ACID POLYMER HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF 3,000 TO 20,000, SAID ACRYLIC ACID POLYMER BEING ALKOXYLATED WITH FROM 2-60% BY WEIGHT OF ETHYLENE OXIDE OR PROPYLENE OXIDE.
Claim 3
Dependent Claim
42 words
The method of claim 1 where the alkoxylated water-soluble polymer is an acrylic acid polymer which has been ethoxylated with from 2 to 60% by weight of ethylene oxide, said starting polymer having a molecular weight range of from 5,000 to 15,000.
References Cited (Backward Citations)
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |