US2739476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric flowmeter
Assignee: Union Oil Company of California
•
Filing: 1950-05-15
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Granted: 1956-03-27
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Expires: 1970-05-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Earle R Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:35
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/113; E21B27/00; E21B27/02; E21B47/11; G; G01; G01F; G01F1/00; G01F1/704
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
AN APPARATUS FOR DETERMINING THE RATE OF FLOW OF A FLOWING LIQUID IN AN OIL WELL WHICH COMPRISES A TUBULAR SECTION INSERTABLE IN SAID WELL, MEANS FOR SUSPENDING SAID TUBULAR SECTION WITHIN SAID WELL, A FIRST INSULATED REACTANCE ELEMENT MOUNTED WITHIN AND TOWARD ONE EXTREMITY OF SAID TUBULAR SECTION, A SECOND INSULATED REACTANCE ELEMENT MOUNTED WITHIN AND TOWARD THE OTHER EXTREMITY OF SAID TUBULAR SECTION, EACH OF SAID REACTANCE ELEMENTS BEING MOUNTED IN KNOWN SPACED RELATIONSHIP TO EACH OTHER AND IN SUCH MANNER AS NOT TO OBSTRUCT FLUID FLOW THROUGH SAID TUBULAR SECTION, AN ELECTRON-COUPLED RADIO FREQUENCY OSCILLATOR, MEANS CONNECTING SAID REACTANCE ELEMENTS IN CIRCUIT WITH SAID OSCILLATOR IN SUCH MANNER AS TO CAUSE VARIATIONS IN POWER OUTPUT OF SAID OSCILLATOR IN RESPONSE TO VARIATIONS IN REACTANCE OF EITHER OF SAID REACTANCE ELEMENTS, AND POWER MEASURING-RECORDING MEANS ELECTRICALLY COUPLED TO SAID OSCILLATOR TO DETECT FLUCTUATIONS IN THE POWER OUTPUT OF SAID OSCILLATOR AND TO INDICATE TIME LAPSES BETWEENS AID FLUCTUATIONS IN POWER OUTPUT.
Claim 2
Independent Claim
163 words
AN APPARATUS FOR DETERMINING THE RATE OF FLOW OF A FLOWING LIQUID IN AN OIL WELL WHICH COMPRISES A TUBULAR SECTION INSERTABLE IN SAID WELL, MEANS FOR SUSPENDING SAID TUBULAR SECTION WITHIN SAID WELL, A FIRST INSULATED REACTANCE ELEMENT MOUNTED WITHIN AND TOWARD ONE EXTREMITY OF SAID TUBULAR SECTION, A SECOND INSULATED REACTANCE ELEMENT MOUNTED WITHIN AND TOWARD THE OTHER EXTREMITY OF SAID TUBULAR SECTION, EACH OF SAID REACTANCE ELEMENTS BEING MOUNTED IN KNOWN SPACED RELATIONSHIP TO EACH OTHER AND IN SUCH MANNER AS NOT TO OBSTRUCT FLUID FLOW THROUGH SAID TUBULAR SECTION, AN ELECTRON-COUPLED RADIO FREQUENCY OSCILLATOR, MEANS CONNECTING SAID REACTANCE ELEMENTS IN CIRCUIT WITH SAID OSCILLATOR IN SUCH MANNER AS TO CAUSE VARIATIONS IN POWER OUTPUT OF SAID OSCILLATOR IN RESPONSE TO VARIATIONS IN REACTANCE OF EITHER OF SAID REACTANCE ELEMENTS, AND POWER MEASURING-RECORDING MEANS ELECTRICALLY COUPLED TO SAID OSCILLATOR TO DETECT FLUCTUATIONS IN THE POWER OUTPUT OF SAID OSCILLATOR AND TO INDICATE TIME LAPSES BETWEENS AID FLUCTUATIONS IN POWER OUTPUT.
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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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |