Patent US2894584A successfully refreshed from Google Patents.
US2894584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well completion
Assignee: Jersey Production Research Co
•
Filing: 1956-12-24
•
Granted: 1959-07-14
•
Expires: 1976-12-24
Abstract
No abstract record available.
Inventors
- 👤 Bertie F Birdwell
- 👤 Gerald G Priest
- 👤 Bryan E Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:52
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/502; Y; Y10; Y10S; Y10S507/00; Y10S507/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A METHOD FOR COMPLETING AND SERVICING A WELL CONTAINING DRILLING FLUID IN WHICH HIGH TEMPERATURES OF THE ORDER OF 200* TO 250*F. ARE ENCOUNTERED WHICH COMPRISES PLACING IN SAID WELL AN EMULSION, CONTAINING FROM ABOUT 5% TO ABOUT 95% BY VOLUME OF AN AQUEOUS MEDIUM, FROM ABOUT 5% TO ABOUT 95% BY VOLUME OF AN OILY MEDIUM, A WEIGHTING AGENT IN AN AMOUNT WITHIN THE RANGE BETWEEN ABOUT 1% BY WEIGHT TO ABOUT SATURATION DISSOLVED IN AT LEAST ONE OF SAID MEDIA, AND AN EMULSIFYING AGENT SELECTED FROM THE ALKALI METAL SALTS OF PURIFIED LIGNIN SULFONIC ACIDS, IN WHICH SUGARS, HEMICELLULOSES, AND OTHER DEGRADATION PRODUCTS HAVE BEEN REMOVED, CONTAINING FROM ABOUT 3% TO ABOUT 33% BY WEIGHT SULFONATE GROUPS AND AMMONIUM AND ALKALI METAL SALTS OF LIGNIN SULFONIC ACIDS CONTAINING FROM ABOUT 38% TO ABOUT 57% LIGNIN SULFONIC
Claim 2
Independent Claim
138 words
A METHOD FOR COMPLETING AND SERVICING A WELL CONTAINING DRILLING FLUID IN WHICH HIGH TEMPERATURES OF THE ORDER OF 200* TO 250*F. ARE ENCOUNTERED WHICH COMPRISES PLACING IN SAID WELL AN EMULSION, CONTAINING FROM ABOUT 5% TO ABOUT 95% BY VOLUME OF AN AQUEOUS MEDIUM, FROM ABOUT 5% TO ABOUT 95% BY VOLUME OF AN OILY MEDIUM, A WEIGHTING AGENT IN AN AMOUNT WITHIN THE RANGE BETWEEN ABOUT 1% BY WEIGHT TO ABOUT SATURATION DISSOLVED IN AT LEAST ONE OF SAID MEDIA, AND AN EMULSIFYING AGENT SELECTED FROM THE ALKALI METAL SALTS OF PURIFIED LIGNIN SULFONIC ACIDS, IN WHICH SUGARS, HEMICELLULOSES, AND OTHER DEGRADATION PRODUCTS HAVE BEEN REMOVED, CONTAINING FROM ABOUT 3% TO ABOUT 33% BY WEIGHT SULFONATE GROUPS AND AMMONIUM AND ALKALI METAL SALTS OF LIGNIN SULFONIC ACIDS CONTAINING FROM ABOUT 38% TO ABOUT 57% LIGNIN SULFONIC
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) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |