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US3154156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hole straightening device
Assignee: Atlantic Richfield Co
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Filing: 1960-12-16
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Granted: 1964-10-27
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Expires: 1980-12-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Moore
- 👤 James M Cleary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:33
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/062; E21B17/00; E21B17/10; E21B17/1014; E21B7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN A BOREHOLE DRILLING APPARATUS HAVING A DRILLING MEANS ROTATED BY A DRILL COLLAR STRING, AN IMPROVED BOREHOLE STRAIGHTENER COMPRISING A SUBSTANTIALLY INFLEXIBLE, ELONGATED, CYLINDRICAL SLEEVE ROTATABLY AND FRICTIONALLY MOUNTED ABOUT SAID DRILL COLLAR STRING ADJACENT SAID DRILLING MEANS, FORCE APPLYING MEANS FORMED ON THE LOWER END OF SAID SLEEVE, STOP MEANS LOCATED ON SAID SLEEVE ABOVE SAID FORCE APPLYING MEANS AND LEADING SAID FORCE APPLYING MEANS WITH RELATION TO THE DIRECTION OF ROTATION OF SAID DRILL COLLAR STRING BY A PREDETERMINED ANGLE OF NOT MORE
Claim 2
Dependent Claim
86 words
IN A BOREHOLE DRILLING APPARATUS HAVING A DRILLING MEANS ROTATED BY A DRILL COLLAR STRING, AN IMPROVED BOREHOLE STRAIGHTENER COMPRISING A SUBSTANTIALLY INFLEXIBLE, ELONGATED, CYLINDRICAL SLEEVE ROTATABLY AND FRICTIONALLY MOUNTED ABOUT SAID DRILL COLLAR STRING ADJACENT SAID DRILLING MEANS, FORCE APPLYING MEANS FORMED ON THE LOWER END OF SAID SLEEVE, STOP MEANS LOCATED ON SAID SLEEVE ABOVE SAID FORCE APPLYING MEANS AND LEADING SAID FORCE APPLYING MEANS WITH RELATION TO THE DIRECTION OF ROTATION OF SAID DRILL COLLAR STRING BY A PREDETERMINED ANGLE OF NOT MORE
References Cited (Backward Citations)
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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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |