US3268274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral blade stabilizer
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1964-05-25
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Granted: 1966-08-23
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Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 John E Ortloff
- 👤 William D Smiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:05
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A DRILL STRING STABILIZER WHICH COMPRISES: (A) A TUBULAR BODY MEMBER PROVIDED WITH MEANS NEAR THE UPPER AND LOWER ENDS THEREOF FOR CONNECTING SAID BODY MEMBER AT AN INTERMEDIATE POSITION IN A ROTARY DRILL STRING; (B) A PLURALITY OF SPIRAL RIBS EXTENDING OUTWARDLY BEYOND SAID BODY MEMBER AT SPACED INTERVALS ABOUT THE PERIPHERY THEREOF, SAID RIBS BEING MADE UP OF LONGITUDINAL SEGMENTS ARRANGED IN SPACED END-TO-END RELATIONSHIP; AND (C) A HARDFACING MATERIAL BONDED TO SAID RIB SEGMENTS TO FORM SMOOTH OUTER SURFACES, SAID HARDFACING MATERIAL COMPRISING REFRACTORY HARDMETAL CARBIDE POWDER GRANULES BETWEEN ABOUT 100 AND ABOUT 400 MESH ON THE TYLER SCREEN SCALE BONDED TOGETHER WITH A METALLIC BINDER HAVING A MELTING POINT BETWEEN ABOUT 1500*F. AND ABOUT 2500*F. AND IN THE MOLTEN STATE HAVING THE ABILITY TO WET SAID POWDER GRANULES.
Claim 2
Dependent Claim
132 words
A DRILL STRING STABILIZER WHICH COMPRISES: (A) A TUBULAR BODY MEMBER PROVIDED WITH MEANS NEAR THE UPPER AND LOWER ENDS THEREOF FOR CONNECTING SAID BODY MEMBER AT AN INTERMEDIATE POSITION IN A ROTARY DRILL STRING; (B) A PLURALITY OF SPIRAL RIBS EXTENDING OUTWARDLY BEYOND SAID BODY MEMBER AT SPACED INTERVALS ABOUT THE PERIPHERY THEREOF, SAID RIBS BEING MADE UP OF LONGITUDINAL SEGMENTS ARRANGED IN SPACED END-TO-END RELATIONSHIP; AND (C) A HARDFACING MATERIAL BONDED TO SAID RIB SEGMENTS TO FORM SMOOTH OUTER SURFACES, SAID HARDFACING MATERIAL COMPRISING REFRACTORY HARDMETAL CARBIDE POWDER GRANULES BETWEEN ABOUT 100 AND ABOUT 400 MESH ON THE TYLER SCREEN SCALE BONDED TOGETHER WITH A METALLIC BINDER HAVING A MELTING POINT BETWEEN ABOUT 1500*F. AND ABOUT 2500*F. AND IN THE MOLTEN STATE HAVING THE ABILITY TO WET SAID POWDER GRANULES.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |