US3303893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for controlling operation of turbodrill
Assignee: Individual
•
Filing: 1964-03-27
•
Granted: 1967-02-14
•
Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Justin A Varney
- 👤 Frederick M Varney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:10
CPC Classifications
E; E21; E21B; E21B44/00; E21B44/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
IN AN APPARATUS TO CARRY OUT A MECHANICAL OPERATION IN A WELL BORE, THE COMBINATION OF: A PIPE STRING ADAPTED FOR LOWERING INTO THE WELL BORE, THE PIPE STRING BEING LONGITUDINALLY EXTENSIBLE AND CONTRACTIBLE; A ROTARY PROCESSING TOOL IN THE LOWER END OF THE A PIPE STRING TO PERFORM THE MECHANICAL OPERATION; POWER MEANS TO ROTATE THE PROCESSING TOOL RELATIVE TO THE PIPE STRING; MEANS TO VARY THE WEIGHT IMPOSED ON THE ROTARY PROCESSING TOOL IN RESPONSE TO EXTENDION AND CONTRACTION OF THE PIPE STRING WHEREBY THE WEIGHT IMPOSED ON THE ROTARY TOOL MAY BE VARIED BY RAISING AND LOWERING THE UPPER END OF THE PIPE STRING; SIGNAL MEANS RESPONSIVE TO EXTENSION AND CONTRACTION OF THE PIPE STRING TO INDICATE THE MAGNITUDE OF THE WEIGHT IMPOSED ON THE ROTARY PROCESSING TOOL; SIGNAL MEANS RESPONSIVE TO ROTATION OF THE CUTTING TOOL RELATIVE TO THE PIPE STRING TO INDICATE WHEN THE RATE OF ROTATION OF THE PROCESSING TOOL DROPS TO A PREDETER-
Claim 2
Dependent Claim
160 words
IN AN APPARATUS TO CARRY OUT A MECHANICAL OPERATION IN A WELL BORE, THE COMBINATION OF: A PIPE STRING ADAPTED FOR LOWERING INTO THE WELL BORE, THE PIPE STRING BEING LONGITUDINALLY EXTENSIBLE AND CONTRACTIBLE; A ROTARY PROCESSING TOOL IN THE LOWER END OF THE A PIPE STRING TO PERFORM THE MECHANICAL OPERATION; POWER MEANS TO ROTATE THE PROCESSING TOOL RELATIVE TO THE PIPE STRING; MEANS TO VARY THE WEIGHT IMPOSED ON THE ROTARY PROCESSING TOOL IN RESPONSE TO EXTENDION AND CONTRACTION OF THE PIPE STRING WHEREBY THE WEIGHT IMPOSED ON THE ROTARY TOOL MAY BE VARIED BY RAISING AND LOWERING THE UPPER END OF THE PIPE STRING; SIGNAL MEANS RESPONSIVE TO EXTENSION AND CONTRACTION OF THE PIPE STRING TO INDICATE THE MAGNITUDE OF THE WEIGHT IMPOSED ON THE ROTARY PROCESSING TOOL; SIGNAL MEANS RESPONSIVE TO ROTATION OF THE CUTTING TOOL RELATIVE TO THE PIPE STRING TO INDICATE WHEN THE RATE OF ROTATION OF THE PROCESSING TOOL DROPS TO A PREDETER-
References Cited (Backward Citations)
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US2879032A
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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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |