US3854038A
Expired / Lapsed
US
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Method and apparatus for compensating fluid flow for a variable physical condition
Assignee: Halliburton Co
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Filing: 1973-08-27
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Granted: 1974-12-10
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Expires: 1993-08-27
Abstract
Abstract A method and system for compensating a manifestation of fluid flow for a variable physical condition of the fluid in which pulses from a condition response transducer and from a fixed frequency oscillator are algebraically combined to control the duration of a gating impulse initiated responsively to fluid flow. The gating impulse is utilized to pass pulses from the oscillator as packets of pulses in which the number of packets is related to fluid flow and in which the number of pulses in each packet is related to the variable physical condition of the fluid.
Inventors
- 👤 R Mckinley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:28
CPC Classifications
G; G01; G01F; G01F15/00; G01F15/02; G01F15/022; G01F15/024
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
111 words
A method for compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising the steps of: a. providing a first signal having a frequency related to gross fluid flow; b. providing a second signal having a frequency related to a variable physical condition of the fluid; c. providing a third signal having a predetermined fixed frequency; d. providing a d.c. control signal in response to the second and third signals; and, e. gating the third signal in response to the first signal and the d.c. control signal to thereby provide an output signal related to fluid flow compensated for the variable physical condition of the fluid.
Claim 2
Independent Claim
111 words
A method for compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising the steps of: a. providing a first signal having a frequency related to gross fluid flow; b. providing a second signal having a frequency related to a variable physical condition of the fluid; c. providing a third signal having a predetermined fixed frequency; d. providing a d.c. control signal in response to the second and third signals; and, e. gating the third signal in response to the first signal and the d.c. control signal to thereby provide an output signal related to fluid flow compensated for the variable physical condition of the fluid.
Claim 3
Dependent Claim
59 words
The method of claim 1 wherein said d.c. control signal is provided by the steps of: subtracting the frequency of one of said second and third signals from the frequency of the other of said second and third signals to provide a difference signal; and, providing a d.c. signal related in amplitude to the frequency of the difference signal.
Claim 4
Dependent Claim
18 words
The method of claim 2 wherein said one of the second and third signals is the third signal.
Claim 5
Dependent Claim
25 words
The method of claim 3 including the further step of nonlinearly modifying the frequency of the difference signal prior to providing the d.c. control signal.
Claim 6
Dependent Claim
40 words
The method of claim 4 including the further step of subtracting the frequency of one of said first and output signals from the frequency of the other of said first and output signals to thereby provide a second difference signal.
Claim 7
Dependent Claim
18 words
The method of claim 5 wherein said one of the first and output signals is the output signal.
Claim 8
Dependent Claim
18 words
The method of claim 1 including the further step of subtracting the output signal from the first signal.
Claim 9
Dependent Claim
25 words
The method of claim 7 including the further step of nonlinearly modifying the responsiveness of the d.c. control signal and the second and third signals.
Claim 10
Dependent Claim
25 words
The method of claim 1 including the further step of nonlinearly modifying the responsiveness of the d.c. control signal and the second and third signals.
Claim 11
Independent Claim
143 words
A method for compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising the steps of: a. providing a first series of pulses at a frequency related to gross fluid flow; b. providing a second series of pulses at a frequency related to a variable physical condition of the fluid; c. providing a third series of pulses at a predetermined fixed frequency; and, d. gating pulses in the third series of pulses in each of a plurality of gating intervals to thereby provide a fourth series of pulses, each of said gating intervals being initiated responsively to a pulse in the first series of pulses and being related in duration to the frequencies of the second and third series of pulses to thereby provide a manifestation of fluid flow compensated for a variable physical condition of the fluid.
Claim 12
Independent Claim
143 words
A method for compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising the steps of: a. providing a first series of pulses at a frequency related to gross fluid flow; b. providing a second series of pulses at a frequency related to a variable physical condition of the fluid; c. providing a third series of pulses at a predetermined fixed frequency; and, d. gating pulses in the third series of pulses in each of a plurality of gating intervals to thereby provide a fourth series of pulses, each of said gating intervals being initiated responsively to a pulse in the first series of pulses and being related in duration to the frequencies of the second and third series of pulses to thereby provide a manifestation of fluid flow compensated for a variable physical condition of the fluid.
Claim 13
Dependent Claim
27 words
The method of claim 10 including the step of subtracting the pulses in the fourth series of pulses from the pulses in the first series of pulses.
Claim 14
Dependent Claim
30 words
The method of claim 11 wherein the duration of each of the gating intervals is related to the difference between the frequencies of the second and third series of pulses.
Claim 15
Dependent Claim
33 words
The method of Claim 12 wherein the frequencies of the second and third series of pulses are the same at the value of the variable physical condition for which no compensation is desired.
Claim 16
Dependent Claim
33 words
The method of claim 10 wherein the frequencies of the second and third series of pulses are the same at the value of the variable physical condition for which no compensation is desired.
Claim 17
Independent Claim
169 words
A method of compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising the steps of: a. providing a first series of pulses related in repetition rate to gross fluid flow; b. providing a second series of pulses at a substantially constant repetition rate; c. providing a third signal related to the variable physical condition of the fluid for which the manifestation of fluid flow is to be compensated; and, d. providing packets of pulses during a plurality of time intervals, the number of pulse packets being related to the number of pulses in the first series of pulses, the number of pulses in each packet being related to the number of pulses in the second series of pulses which occur during one of the time intervals, and the duration of each of the time intervals being related to the number of pulses in the third signal which are provided in a time interval immediately following a pulse in the first series of pulses.
Claim 18
Independent Claim
169 words
A method of compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising the steps of: a. providing a first series of pulses related in repetition rate to gross fluid flow; b. providing a second series of pulses at a substantially constant repetition rate; c. providing a third signal related to the variable physical condition of the fluid for which the manifestation of fluid flow is to be compensated; and, d. providing packets of pulses during a plurality of time intervals, the number of pulse packets being related to the number of pulses in the first series of pulses, the number of pulses in each packet being related to the number of pulses in the second series of pulses which occur during one of the time intervals, and the duration of each of the time intervals being related to the number of pulses in the third signal which are provided in a time interval immediately following a pulse in the first series of pulses.
Claim 19
Independent Claim
117 words
A system for compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising: means for providing a first signal having a frequency related to gross fluid flow; means for providing a second signal having a frequency related to a variable physical condition of the fluid; means for providing a third signal having a predetermined fixed frequency; means responsive to said second and third signal providing means for providing a d.c. control signal; and, gating means responsive to said first and control signal providing means for gating pulses from said third signal providing means to thereby provide an output signal related to fluid flow compensated for the variable physical condition of the fluid.
Claim 20
Independent Claim
117 words
A system for compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising: means for providing a first signal having a frequency related to gross fluid flow; means for providing a second signal having a frequency related to a variable physical condition of the fluid; means for providing a third signal having a predetermined fixed frequency; means responsive to said second and third signal providing means for providing a d.c. control signal; and, gating means responsive to said first and control signal providing means for gating pulses from said third signal providing means to thereby provide an output signal related to fluid flow compensated for the variable physical condition of the fluid.
Claim 21
Dependent Claim
69 words
The system of claim 16 wherein said d.c. control signal providing means includes: means for subtracting the number of pulses provided by one of said second and third signal providing means from the number of pulses provided by the other of said second and third signal providing means to thereby provide a difference signal; and, means responsive to said difference signal providing means for providing said d.c. control signal.
Claim 22
Dependent Claim
22 words
The system of claim 17 wherein said one of said second and third signal providing means is said third signal providing means.
Claim 23
Dependent Claim
22 words
The system of claim 18 including means for nonlinearly modifying the frequency of the difference signal from said difference signal providing means.
Claim 24
Dependent Claim
48 words
The system of claim 19 including means for subtracting the number of pulses provided by one of said first and output signal providing means from the number of pulses provided by the other of said first and output signal providing means to thereby provide a second output signal.
Claim 25
Dependent Claim
22 words
The system of claim 20 wherein said one of said first and output signal providing means is said output signal providing means.
Claim 26
Dependent Claim
26 words
The system of claim 16 including means for subtracting the number of pulses in said output signal from the number of pulses in said first signal.
Claim 27
Dependent Claim
27 words
The system of claim 22 including means for nonlinearly modifying the relationship of said d.c. control signal providing means to said second and third signal providing means.
Claim 28
Dependent Claim
27 words
The system of claim 16 including means for nonlinearly modifying the relationship of said d.c. control signal providing means to said second and third signal providing means.
Claim 29
Independent Claim
157 words
A system for compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising: means for providing a first series of pulses at a frequency related to gross fluid flow; means for providing a second series of pulses at a frequency related to a variable physical condition of the fluid; means for providing a third series of pulses at a predetermined fixed frequency; and, means for gating pulses in the third series of pulses in each of a plurality of gating intervals to thereby provide a fourth series of pulses, said gating in each being responsive to said first series of pulses providing means to initiate each of said gating intervals, said gating means being responsive to said second and third series of pulses providing means in controlling the duration of each of said gating intervals to thereby provide a manifestation of fluid flow compensated for a variable physical condition of the fluid.
Claim 30
Independent Claim
157 words
A system for compensating a manifestation of fluid flow for a variable physical condition of the fluid comprising: means for providing a first series of pulses at a frequency related to gross fluid flow; means for providing a second series of pulses at a frequency related to a variable physical condition of the fluid; means for providing a third series of pulses at a predetermined fixed frequency; and, means for gating pulses in the third series of pulses in each of a plurality of gating intervals to thereby provide a fourth series of pulses, said gating in each being responsive to said first series of pulses providing means to initiate each of said gating intervals, said gating means being responsive to said second and third series of pulses providing means in controlling the duration of each of said gating intervals to thereby provide a manifestation of fluid flow compensated for a variable physical condition of the fluid.
Claim 31
Dependent Claim
32 words
The system of claim 25 including means for subtracting the pulses provided by said fourth series of pulses providing means from the pulses provided by said first series of pulses providing means.
Claim 32
Dependent Claim
33 words
The system of claim 26 wherein the frequencies of the second and third series of pulses are the same at the value of the variable physical condition for which no compensation is desired.
Claim 33
Dependent Claim
33 words
The system of claim 25 wherein the frequencies of the second and third series of pulses are the same at the value of the variable physical condition for which no compensation is desired.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |