US3834227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining liquid production from a well
Assignee: Shell USA Inc
•
Filing: 1973-05-02
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Granted: 1974-09-10
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Expires: 1993-05-02
Abstract
Abstract A method for determining the liquid flow in a pipe having either slug or two-phase flow wherein the dynamic pressure fluctuations are measured, and converted to a useful signal. The root mean square of the signal is obtained and integrated over a specific time interval to obtain the liquid flow in the pipe.
Inventors
- 👤 M Patterson
- 👤 B Sheffield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:08
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; E; E21; E21B; E21B47/00; E21B47/10; G01F1/74
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
A method for differentiating between liquid and gas flow iN a well producing hydrocarbons and having two-phase flow; said method comprising: measuring at the surface fluctuations in the pressure of turbulent fluid flow from said well and measuring the RMS value of the fluctuations in the pressure; and integrating said RMS signal occurring in a predetermined time period to obtain the liquid flow from the well.
Claim 2
Independent Claim
66 words
A method for differentiating between liquid and gas flow iN a well producing hydrocarbons and having two-phase flow; said method comprising: measuring at the surface fluctuations in the pressure of turbulent fluid flow from said well and measuring the RMS value of the fluctuations in the pressure; and integrating said RMS signal occurring in a predetermined time period to obtain the liquid flow from the well.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein the pressure fluctuation signal is an electrical signal and the energy is measured by taking the root mean square of the signal.
Claim 4
Dependent Claim
24 words
The method of claim 2 wherein the well is a gas lift well and pressure fluctuations below two cycles per second are not measured.
Claim 5
Independent Claim
58 words
A method for determining total liquid flow in a well having turbulent flow comprising: measuring at the surface fluctuations in the pressure of liquid flow in said well and measuring the RMS value of the fluctuations in the pressure; and integrating said RMS signal occurring in a predetermined time period to obtain the liquid flow in the well.
Claim 6
Independent Claim
58 words
A method for determining total liquid flow in a well having turbulent flow comprising: measuring at the surface fluctuations in the pressure of liquid flow in said well and measuring the RMS value of the fluctuations in the pressure; and integrating said RMS signal occurring in a predetermined time period to obtain the liquid flow in the well.
References Cited (Backward Citations)
SU150656A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |