Patent US3194331A successfully refreshed from Google Patents.
US3194331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill collar with helical grooves
Assignee: ARNOLD PIPE RENTAL Co
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Filing: 1964-05-22
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Granted: 1965-07-13
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Expires: 1984-05-22
Abstract
No abstract record available.
Inventors
- 👤 Edward P Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:03
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/22; E21B17/16; Y; Y10; Y10T; Y10T408/00; Y10T408/34; Y10T408/352; Y10T408/44; Y10T408/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN INTEGRAL ELONGATE TUBULAR MEMBER HAVING MEANS AT OPPOSITE ENDS FOR CONNECTION IN A ROTARY DRILL STRING AND AT LEAST ONE HELICAL GROOVE IN ITS OUTER PERIPHERAL SURFACE, WHICH IS OF V-SHAPED IN SECTION TRANSVERSELY OF THE MEMBER, THE LEG OF THE V-SHAPE WHICH IS LOCATED AT THE LEADING EDGE OF THE GROOVE DURING DRILL STRING ROTATION IN THE NORMAL DRILLING DRICTION BEING ON THE ORDER OF ABOUT THIRTEEN PERCENT AS LONG AS THE OTHER LEG AND PROJECTING INWARDLY TO SAID PERIPHERAL SURFACE AT AN ANGLE OF LESS THN FORTY DEGREES TO A RADIAL LINE AT SAID LEADING EDGE OF THE GROOVE.
Claim 2
Dependent Claim
102 words
AN INTEGRAL ELONGATE TUBULAR MEMBER HAVING MEANS AT OPPOSITE ENDS FOR CONNECTION IN A ROTARY DRILL STRING AND AT LEAST ONE HELICAL GROOVE IN ITS OUTER PERIPHERAL SURFACE, WHICH IS OF V-SHAPED IN SECTION TRANSVERSELY OF THE MEMBER, THE LEG OF THE V-SHAPE WHICH IS LOCATED AT THE LEADING EDGE OF THE GROOVE DURING DRILL STRING ROTATION IN THE NORMAL DRILLING DRICTION BEING ON THE ORDER OF ABOUT THIRTEEN PERCENT AS LONG AS THE OTHER LEG AND PROJECTING INWARDLY TO SAID PERIPHERAL SURFACE AT AN ANGLE OF LESS THN FORTY DEGREES TO A RADIAL LINE AT SAID LEADING EDGE OF THE GROOVE.
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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |