US2811208A
Expired / Lapsed
US
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Well cementing apparatus
Assignee: California Research LLC
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Filing: 1955-08-26
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Granted: 1957-10-29
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Expires: 1975-08-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Eadie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:38
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A METHOD OF CEMENTING A WELL CASING IN A WELL BORE WHICH COMPRISES EJECTING FROM THE INTERIOR OF THE CASING THROUGH FIRST FLOW PATHS INTO A LENTH OF THE ANNULAR SPACE BETWEEN THE CASING AND THE WELL BORE RADIALLY DIRECTED JETS OF CEMENT SLURRY AT SUFFICIENTLY HIGH VELOCITY TO ERODE THE DEPOSIT LAYER MUD CAKE FROM THE WELL-BORE AND TO REPLACE SAID DEPOSIT LAYER WITH CEMENT SLURRY, AND CONTINUING THE EJECTION OF SLURRY THROUGH SECOND FLOW PATHS IN THE FORM OF LOWER VELOCITY, RADIALLY DIRECTED STREAMS INTO SAID LENGTH OF SAID ANNULAR SPACE UNTIL THE COMPLETION OF THE CEMENTING OPERATION.
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |