Patent US3215215A successfully refreshed from Google Patents.
US3215215A
Expired / Lapsed
US
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Diamond bit
Assignee: ExxonMobil Upstream Research Co
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Filing: 1962-08-27
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Granted: 1965-11-02
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Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Jackson M Kellner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:23
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A ROTARY DRILL BIT COMPRISING: (A) A BODY MEMBER PROVIDED WITH MEANS NEAR THE UPPER END THEREOF FOR CONNECTING SAID BIT TO THE LOWER END OF A ROTARY DRILL STRING; (B) A CROWN ATTACHED TO THE LOWER END OF SAID BODY MEMBER FOR ENGAGING THE FORMATION AT THE BOTTOM OF A BOREHOLE, SAID BODY MEMBER AND CROWN CONTAINING A FIRST FLUID PASSAGEWAY EXTENDING FROM AN OPENING IN SAID BODY MEMBER ABOVE SAID CROWN TO AN OPENING IN THE LOWER SURFACE OF SAID CROWN NEAR THE LONGITUDINAL AXIS OF SAID BIT AND A PLURALITY OF ADDITIONAL FLUID PASSAGEWAYS EXTENDING LONGITUDINALLY IN SAID BODY MEMBER AND CROWN FROM OPENINGS NEAR THE UPPER END OF SAID BODY MEMBER TO DISCHARGE PORTS EXTENDING UPWARDLY IN THE LOWER SURFACE OF SAID CROWN AT POINTS LATERALLY DISPLACED FROM THE LONGITUDINAL AXIS OF SAID BIT;
Claim 2
Dependent Claim
138 words
A ROTARY DRILL BIT COMPRISING: (A) A BODY MEMBER PROVIDED WITH MEANS NEAR THE UPPER END THEREOF FOR CONNECTING SAID BIT TO THE LOWER END OF A ROTARY DRILL STRING; (B) A CROWN ATTACHED TO THE LOWER END OF SAID BODY MEMBER FOR ENGAGING THE FORMATION AT THE BOTTOM OF A BOREHOLE, SAID BODY MEMBER AND CROWN CONTAINING A FIRST FLUID PASSAGEWAY EXTENDING FROM AN OPENING IN SAID BODY MEMBER ABOVE SAID CROWN TO AN OPENING IN THE LOWER SURFACE OF SAID CROWN NEAR THE LONGITUDINAL AXIS OF SAID BIT AND A PLURALITY OF ADDITIONAL FLUID PASSAGEWAYS EXTENDING LONGITUDINALLY IN SAID BODY MEMBER AND CROWN FROM OPENINGS NEAR THE UPPER END OF SAID BODY MEMBER TO DISCHARGE PORTS EXTENDING UPWARDLY IN THE LOWER SURFACE OF SAID CROWN AT POINTS LATERALLY DISPLACED FROM THE LONGITUDINAL AXIS OF SAID BIT;
References Cited (Backward Citations)
US1785120A
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US2708103A
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US2738167A
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US2854219A
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US2950090A
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FR1232026A
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FR1257184A
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US3055443A
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US3075592A
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US3086602A
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US3112803A
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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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |