US3097433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
cubberly
Assignee: —
•
Filing: —
•
Granted: 1963-07-16
•
Expires: 1980-07-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:39
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A WELL TOOL FOR USE IN A WELL BORE INCLUDING A HOUSING, A PAIR OF TUBULAR COLLARS ON SAID HOUSING WHEREIN AT LEAST ONE OF SAID COLLARS IS SLIDABLE ON SAID HOUSING PERMITTING RELATIVE MOVEMENT BETWEEN SAID COLLARS, BOWS SPRINGS PIVOTALLY CONNECTED TO SAID COLLARS, RESPECTIVELY HAVING A PEREFORMED CURVATURE SO THAT THE CENTRAL PORTIONS OF SAID SPRINGS NORMALLY EXTEND OUTWARDLY OF SAID HOUSING INTERMEDIATE OF A FULLY COLLAPSED AND A FULLY EXTENDED POSITION FOR SAID CENTRAL PORTIONS OF SAID SPRINGS SAID PREFORMED CURVATURE BEING SYMMETRICAL ABOUT A MIDPOINT OF EACH SPRING, THE SHAPE OF ONE-HALF OF EACH SPRING HAVING A CURVATURE DEFINED BY THE FORMULA
Claim 2
Dependent Claim
106 words
A WELL TOOL FOR USE IN A WELL BORE INCLUDING A HOUSING, A PAIR OF TUBULAR COLLARS ON SAID HOUSING WHEREIN AT LEAST ONE OF SAID COLLARS IS SLIDABLE ON SAID HOUSING PERMITTING RELATIVE MOVEMENT BETWEEN SAID COLLARS, BOWS SPRINGS PIVOTALLY CONNECTED TO SAID COLLARS, RESPECTIVELY HAVING A PEREFORMED CURVATURE SO THAT THE CENTRAL PORTIONS OF SAID SPRINGS NORMALLY EXTEND OUTWARDLY OF SAID HOUSING INTERMEDIATE OF A FULLY COLLAPSED AND A FULLY EXTENDED POSITION FOR SAID CENTRAL PORTIONS OF SAID SPRINGS SAID PREFORMED CURVATURE BEING SYMMETRICAL ABOUT A MIDPOINT OF EACH SPRING, THE SHAPE OF ONE-HALF OF EACH SPRING HAVING A CURVATURE DEFINED BY THE FORMULA
References Cited (Backward Citations)
US2170527A
Cited
US2639512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |