US2861636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time setting clay cement and method of correcting lost circulation
Assignee: ExxonMobil Oil Corp
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Filing: 1952-04-18
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Granted: 1958-11-25
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Expires: 1972-04-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph U Messenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:30
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/845; C04; C04B; C04B28/00; C04B28/02; C04B7/00; C04B7/345; C09K8/42; E; E21; E21B; E21B21/00; E21B21/003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A METHOD OF CORRECTING LOST RETURNS OF DRILLING FLUID IN THE DRILLING OF A WELL INTO THE EARTH COMPRISING PLACING IN SAID WELL AT A LOCATION WHERE DRILLING FLUID IS BEING LOST FROM SAID WELL INTO AN EARTH FORMATION A SLURRY OF CLAY CEMENT COMPRISING A CLAY HAVING GEL STRENGTH PROPERTIES, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACTIVATED SILICA, ACTIVATED ALUMINA, AND SILICA-ALUMINA IN AN AMOUNT NOT GREATER THAN ABOUT 10 PERCENT BY WEIGHT OF SAID CLAY CEMENT, SAID SILICA-ALUMINA HAVING THE FORMULA MA(SIO2)B(A12O3)C(H2O)D, WHERE M IS SELECTED FROM THE GROUP CONSISTING OF THE ALKALI AND ALKALINE EARTH METALS AND A=0-0.08, B=0.7-1.56, C=0.02-0.4, AND D=0.25-1.0, AND WATER IN AN AMOUNT NOT GREATER THAN ABOUT 65 PERCENT BY WEIGHT OF SAID SLURRY.
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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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |