US3322218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-port diamond bit
Assignee: ExxonMobil Upstream Research Co
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Filing: 1965-05-04
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Granted: 1967-05-30
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Expires: 1985-05-04
Abstract
No abstract record available.
Inventors
- 👤 Alexander B Hildebrandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:18
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/60; E21B10/61; E21B10/46
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
A DIAMOND CORE BIT COMPRISING: (A) A BODY MEMBER CONTAINING LONGITUDINAL PASSAGEWAYS FOR RECEIVING A CORE AND TRANSMITTING DRILLING FLUID THROUGH SAID MEMBER; (B) AN ANNULAR CROWN CONNECTED TO THE LOWER END OF SAID BODY MEMBER, SAID CROWN INCLUDING (I) A LOWER SURFACE CONTAINING AN AXIAL CORE OPENING AND A PLURALITY OF DISCHARGE PORTS COMMUNICATING WITH SAID PASSAGEWAYS IN SAID BODY MEMBER; (II) A PLURALITY OF LANDS EXTENDING DOWNWARDLY BELOW THE ADJACENT CROWN SURFACE AROUND SAID DISCHARGE PORTS, EACH OF SAID LANDS ENCLOSING A DISCHARGE PORT WHEREBY FLUID DISCHARGED FROM SAID PORT MUST PASS BENEATH SAID LAND TO REACH THE BOREHOLE ANNULUS AND EACH LAND BEING OF SUBSTANTIALLY UNIFORM WIDTH AT ALL POINTS ABOUT THE PORT ENCLOSED THEREIN; AND (III) GAGE SURFACES EXTENDING UPWARDLY ON THE CROWN PERIPHERY; AND (C) A PLURALITY OF DIAMONDS EMBEDDED IN THE LOWER FACES OF SAID LANDS.
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |