US3231803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural motor, generator-fed electric drive for drawworks
Assignee: Oil States Industries Inc
•
Filing: 1963-03-04
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Granted: 1966-01-25
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Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Dale H Pryor
- 👤 James E Pryor
- 👤 Albert A Ashton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:14
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
DRILLING APPARATUS COMPRISING, A DRAWWORKS, A PLURALITY OF ELECTRIC MOTORS, MEANS PROVIDING A DRIVING CONNECTION BETWEEN SAID MOTORS AND SAID DRAWWORKS, GENERATOR MEANS, MEANS ELECTRICALLY CONNECTING SAID GENERATOR MEANS TO SAID MOTORS FOR SUPPLYING ELECTRICITY TO SAID MOTORS, ENGINE MEANS, AND MEANS CONNECTING SAID ENGINE MEANS TO SAID GENERATOR MEANS FOR SUPPLYING POWER TO SAID GENERATOR MEANS, SAID ELECTRIC MOTORS HAVING A TOTAL POWER ABSORPTION CAPACITY SUBSTANTIALLY LARGER THAN THE POWER OUTPUT CAPACITY OF THE ENGINE MEANS WHEREBY THE TORQUE AVAILABLE TO DRIVE SAID DRAWWORKS IS SUBSTANTIALLY GREATER THAN WOULD BE AVAILABLE FROM MOTORS HAVING A TOTAL POWER ADSORPTION CAPACITY EQUAL TO THE POWER OUTPUT CAPACITY OF THE ENGINE MEANS.
Claim 2
Dependent Claim
110 words
DRILLING APPARATUS COMPRISING, A DRAWWORKS, A PLURALITY OF ELECTRIC MOTORS, MEANS PROVIDING A DRIVING CONNECTION BETWEEN SAID MOTORS AND SAID DRAWWORKS, GENERATOR MEANS, MEANS ELECTRICALLY CONNECTING SAID GENERATOR MEANS TO SAID MOTORS FOR SUPPLYING ELECTRICITY TO SAID MOTORS, ENGINE MEANS, AND MEANS CONNECTING SAID ENGINE MEANS TO SAID GENERATOR MEANS FOR SUPPLYING POWER TO SAID GENERATOR MEANS, SAID ELECTRIC MOTORS HAVING A TOTAL POWER ABSORPTION CAPACITY SUBSTANTIALLY LARGER THAN THE POWER OUTPUT CAPACITY OF THE ENGINE MEANS WHEREBY THE TORQUE AVAILABLE TO DRIVE SAID DRAWWORKS IS SUBSTANTIALLY GREATER THAN WOULD BE AVAILABLE FROM MOTORS HAVING A TOTAL POWER ADSORPTION CAPACITY EQUAL TO THE POWER OUTPUT CAPACITY OF THE ENGINE MEANS.
References Cited (Backward Citations)
US1511990A
Cited
US2370855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |