US3580072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time averaging method and apparatus for obtaining fluid measurements
Assignee: Mobil Oil AS
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Filing: 1967-12-27
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Granted: 1971-05-25
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Expires: 1987-12-27
Abstract
Abstract This specification discloses a method and apparatus for accumulating signals from a water-cut monitor and a flow meter in a form whereby the net oil and net water in an oil-water mixture may be determined. A flow meter signal in the form of constantamplitude, frequency-variable DC pulses is applied to a capacitor to charge the same. A signal from the water-cut monitor is modulated in proportion to the meter signal in order to produce a modulated signal of DC pulses in which pulse amplitude is proportional to water content and pulse frequency is proportional to flow rate. This modulated signal is stored on another capacitor. Both capacitors are interrogated at periodic time intervals in order to obtain read-out signals representative of the charges thereon and the capacitors are discharged. Also disclosed is a system for obtaining gas flow information. In this system a pressure signal is modulated in proportion to a Delta P signal to produce a modulated signal of DC pulses which is applied to a capacitor. The capacitor is interrogated as described above.
Inventors
- 👤 John B Cox
- 👤 Jacque R Stoltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:18
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/64; G01F1/74
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
In a method of characterizing a gas flowing through a fluid distribution system, the steps comprising: a. generating an electrical signal representative of the pressure of said gas in said distribution systems; b. generating an electrical signal representative of the pressure differential across a gas flow meter in said distribution system; c. modulating one of said signals in proportion to the other of said signals to produce a pulsed electric output signal; d. applying said output signal to a capacitor to charge said capacitor over a time interval; e. producing a read-out signal representative of the charge on said capacitor and discharging said capacitor; and f. thereafter charging said capacitor in accordance with step (d) and repeating step (e).
Claim 2
Dependent Claim
119 words
In a method of characterizing a gas flowing through a fluid distribution system, the steps comprising: a. generating an electrical signal representative of the pressure of said gas in said distribution systems; b. generating an electrical signal representative of the pressure differential across a gas flow meter in said distribution system; c. modulating one of said signals in proportion to the other of said signals to produce a pulsed electric output signal; d. applying said output signal to a capacitor to charge said capacitor over a time interval; e. producing a read-out signal representative of the charge on said capacitor and discharging said capacitor; and f. thereafter charging said capacitor in accordance with step (d) and repeating step (e).
Claim 3
Dependent Claim
62 words
The method of claim 1 wherein said pressure differential signal is a DC signal of frequency-variable pulses, said pressure signal is an analog DC signal, and said pressure signal is gated in proportion to said pressure differential signal to produce a modulated signal of DC pulses in which pulse amplitude is proportional to pressure and pulse frequency is proportional to differential pressure.
Claim 4
Dependent Claim
43 words
The method of claim 1 further comprising carrying out steps (a), (b), (c), (d), (e), and (f) at each of a plurality of measuring stations in said fluid distribution system and applying the read-out signals produced in step (e) to a central station.
Claim 5
Dependent Claim
109 words
In an averaging system for determining the cumulative flow of gas, the combination comprising: a pressure transducer for generating an electrical signal representative of static pressure; a differential pressure transducer for generating an electrical signal representative of differential pressure across a gas flow meter; a capacitor; circuit means interconnecting said pressure and differential pressure transducers with said capacitor; modulating means in said circuit means for modulating one of said signals in proportion to the other of said signals to produce a pulsed electric output signal for application to said capacitor; means for producing a read-out signal representative of the charge on said capacitor; and means for discharging said capacitor.
Claim 6
Dependent Claim
109 words
In an averaging system for determining the cumulative flow of gas, the combination comprising: a pressure transducer for generating an electrical signal representative of static pressure; a differential pressure transducer for generating an electrical signal representative of differential pressure across a gas flow meter; a capacitor; circuit means interconnecting said pressure and differential pressure transducers with said capacitor; modulating means in said circuit means for modulating one of said signals in proportion to the other of said signals to produce a pulsed electric output signal for application to said capacitor; means for producing a read-out signal representative of the charge on said capacitor; and means for discharging said capacitor.
Claim 7
Dependent Claim
43 words
The combination of claim 4 further comprising a plurality of said averaging systems at a plurality of measuring stations in a fluid distribution system, a central station, and means for applying the read-out signals from the respective averaging systems to said central station.
References Cited (Backward Citations)
AU226161A
Cited
US3385108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |