US2776713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementing of wells
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-09-30
•
Granted: 1957-01-08
•
Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 Bryan E Morgan
- 👤 Charles L Prokop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:19
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/502
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD FOR CEMENTING OIL AND GAS WELLS, AND THE LIKE, WHICH COMPRISES PUMPING A SLURRY OF PORTLAND CEMENT, THE REACTION PRODUCT RESULTING FROM TREATING A WATER SLURRY OF HIGH-GRADE SODIUM BENTONITE WITH ONE OF THE LARGER QUATERNARY AMMONIUM COMPLEXES, AND OIL INTO A WELL BORE PENETRATING AN EARTH FORMATION, SAID CEMENT, OIL AND REACTION PRODUCT BEING PRESENT IN SAID SLURRY IN SUFFICIENT AMOUNTS TO FORM A FILTER CAKE, IMPOSING PRESSURE ON SAID SLURRY IN EXCESS OF FORMATION PRESSURE TO FORCE A PORTION OF SAID SLURRY AT LEAST INTO CONTACT WITH THE FORMATION AND TO DEPOSIT CEMENT SOLIDS, REMOVING EXCESS CEMENT SLURRY FROM THE WELL BORE WHILE MAINTAINING SAID PRESSURE, AND THEN FORCING WATER THROUGH THE PORTION OF THE DEPOSITED SOLIDS TO SET SAID CEMENT.
Claim 2
Independent Claim
125 words
A METHOD FOR CEMENTING OIL AND GAS WELLS, AND THE LIKE, WHICH COMPRISES PUMPING A SLURRY OF PORTLAND CEMENT, THE REACTION PRODUCT RESULTING FROM TREATING A WATER SLURRY OF HIGH-GRADE SODIUM BENTONITE WITH ONE OF THE LARGER QUATERNARY AMMONIUM COMPLEXES, AND OIL INTO A WELL BORE PENETRATING AN EARTH FORMATION, SAID CEMENT, OIL AND REACTION PRODUCT BEING PRESENT IN SAID SLURRY IN SUFFICIENT AMOUNTS TO FORM A FILTER CAKE, IMPOSING PRESSURE ON SAID SLURRY IN EXCESS OF FORMATION PRESSURE TO FORCE A PORTION OF SAID SLURRY AT LEAST INTO CONTACT WITH THE FORMATION AND TO DEPOSIT CEMENT SOLIDS, REMOVING EXCESS CEMENT SLURRY FROM THE WELL BORE WHILE MAINTAINING SAID PRESSURE, AND THEN FORCING WATER THROUGH THE PORTION OF THE DEPOSITED SOLIDS TO SET SAID CEMENT.
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) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |