Patent US3285678A successfully refreshed from Google Patents.
US3285678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill collar stabilizer
Assignee: DRILCO OIL TOOL Inc
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Filing: 1964-01-13
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Granted: 1966-11-15
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Expires: 1984-01-13
Abstract
No abstract record available.
Inventors
- 👤 William R Garrett
- 👤 Jr Samuel T Crews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:36
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A DRILL COLLAR STABILIZER COMPRISING A GENERALLY TUBULAR BODY, MEANS AT EACH END OF THE BODY FOR CONNECTING THE BODY IN A DRILL STRING, A PLURALITY OF HELICAL BLADES INTEGRAL WITH THE OUTER PERIPHERY OF SAID BODY EXTENDING RADIALLY OUTWARDLY THEREFROM, EACH OF SAID BLADES HAVING A PLURALITY OF BEDS OF DEEP HARD FACING IN THE OUTER PERIPHERAL SURFACE THEREOF EXTENDING TRANSVERSELY THEREACROSS, SAID BEDS BEING FORMED BY A PLURALITY OF GROOVES IN THE OUTER PERIPHERIES OF THE BLADES EXTENDING LONGITUDINALLY RELATIVE TO THE STABILIZER BODY AND CIRCUMFERENTIALLY SPACED APART, EACH GROOVE EXTENDING LONGITUDINALLY BEYOND THE UPPER END OF THE ADJACENT GROOVE AT ONE SIDE THEREOF AND THE LOWER END OF THE ADJACENT GROOVE AT THE OTHER SIDE THEREOF, EACH SAID GROOVE BEING FILLED FLUSH WITH A PLURALITY OF CONTIGUOUS TUNGSTEN CARBIDE PELLETS HELD IN PLACE BY BRAZING MATERIAL.
Claim 2
Dependent Claim
139 words
A DRILL COLLAR STABILIZER COMPRISING A GENERALLY TUBULAR BODY, MEANS AT EACH END OF THE BODY FOR CONNECTING THE BODY IN A DRILL STRING, A PLURALITY OF HELICAL BLADES INTEGRAL WITH THE OUTER PERIPHERY OF SAID BODY EXTENDING RADIALLY OUTWARDLY THEREFROM, EACH OF SAID BLADES HAVING A PLURALITY OF BEDS OF DEEP HARD FACING IN THE OUTER PERIPHERAL SURFACE THEREOF EXTENDING TRANSVERSELY THEREACROSS, SAID BEDS BEING FORMED BY A PLURALITY OF GROOVES IN THE OUTER PERIPHERIES OF THE BLADES EXTENDING LONGITUDINALLY RELATIVE TO THE STABILIZER BODY AND CIRCUMFERENTIALLY SPACED APART, EACH GROOVE EXTENDING LONGITUDINALLY BEYOND THE UPPER END OF THE ADJACENT GROOVE AT ONE SIDE THEREOF AND THE LOWER END OF THE ADJACENT GROOVE AT THE OTHER SIDE THEREOF, EACH SAID GROOVE BEING FILLED FLUSH WITH A PLURALITY OF CONTIGUOUS TUNGSTEN CARBIDE PELLETS HELD IN PLACE BY BRAZING MATERIAL.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |