Patent US3103391A successfully refreshed from Google Patents.
US3103391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill string stabilizer
Assignee: —
•
Filing: —
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Granted: 1963-09-10
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Expires: 1980-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:07
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1042; E21B17/1078
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A DRILL STRING STABLIZER ADAPTED TO BE ROTATABLY MOUNTED UPON A GENERALLY VERTICALLY ORIENTED DRILL STRING COMPRISING: AN ELONGATE CYLINDRICAL ELASTOMERIC BODY HAVING AN OUTSIDE DIAMETER DEFINING THE OUTSIDE DIAMETER OF THE STABILIZER AND AN INSIDE DIAMETER SUBSTANTIALLY EQUAL TO THE PORTION OF THE DRILL STRING UPON WHICH THE STABILIZER IS ADAPTED TO BE MOUNTED; CIRCUMFERENTIALLY SPACED LONGITUDINALLY EXTENDING FLUTES AND RIB SECTIONS DEFINED BY THE EXTERIOR SURFACE OF SAID BODY; AND A LONGITUDINALLY EXTENDING RIGID WEAR MEMBER OF DRILLABLE MATERIAL POSITIONED WITHIN AND AFFIXED TO EACH OF SAID RIBS RESPECTIVELY, EACH OF SAID MEMBERS INCLUDING FIRST AND SECOND LONGITUDINALLY
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) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |