US2585378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementing of wells
Assignee: Stanolind Oil and Gas Co
•
Filing: 1946-03-01
•
Granted: 1952-02-12
•
Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Riley F Farris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:49
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/5045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A WELL CEMENTING METHOD COMPRISING INTRODUCING INTO A WELL A FIRST HYDRAULIV CEMENT SLURRY CONTAINING A STARCHY MATERIAL, FOLLOWING SAID FIRST HYDRAULIC CEMENT SLURRY WITH A SECOND SLURRY OF COARSELY GROUND HYDRAULIC CEMENT CLINKER, SAID SECOND SLURRY BEING INTRODUCED INTO SAID WELL UNDER PRESSURE, WHEREBY SAID SECOND SLURRY WILL BE PHYSICALLY DEHYDRATED WHEN IT CONTACTS A PERMEABLE FORMATION IN SAID WELL, AND A SQUEEZE PRESSURE IS OBTAINED.
Claim 2
Dependent Claim
67 words
A WELL CEMENTING METHOD COMPRISING INTRODUCING INTO A WELL A FIRST HYDRAULIV CEMENT SLURRY CONTAINING A STARCHY MATERIAL, FOLLOWING SAID FIRST HYDRAULIC CEMENT SLURRY WITH A SECOND SLURRY OF COARSELY GROUND HYDRAULIC CEMENT CLINKER, SAID SECOND SLURRY BEING INTRODUCED INTO SAID WELL UNDER PRESSURE, WHEREBY SAID SECOND SLURRY WILL BE PHYSICALLY DEHYDRATED WHEN IT CONTACTS A PERMEABLE FORMATION IN SAID WELL, AND A SQUEEZE PRESSURE IS OBTAINED.
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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) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |