US3908761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining liquid production from a well
Assignee: Shell USA Inc
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Filing: 1974-08-05
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Granted: 1975-09-30
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Expires: 1994-08-05
Abstract
Abstract A method for determining the liquid flow in a pipe having turbulent flow, for example, 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
- 👤 Maurice M Patterson
- 👤 Bass C Sheffield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:57
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B43/00; E21B43/12; E21B43/121; F; F04; F04B; F04B49/00; F04B49/10; F04B49/106; G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/74
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A method for controlling the operation of an artificially lifted oil well comprising: measuring at the surface fluctuations in the pressure of the fluid flow from the well; measuring the RMS value of the fluctuations; integrating the RMS signal occurring in a predetermined time period to obtain a signal related to the liquid flow from the well; comparing said integrated signal with a pre-set signal representing the desired liquid flow from the well over the time period to obtain an error signal; and controlling the aritificial lift means in response to said error signal.
Claim 2
Independent Claim
94 words
A method for controlling the operation of an artificially lifted oil well comprising: measuring at the surface fluctuations in the pressure of the fluid flow from the well; measuring the RMS value of the fluctuations; integrating the RMS signal occurring in a predetermined time period to obtain a signal related to the liquid flow from the well; comparing said integrated signal with a pre-set signal representing the desired liquid flow from the well over the time period to obtain an error signal; and controlling the aritificial lift means in response to said error signal.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the well is a gas lift well and the quantity of gas injected into the well is controlled.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein the well is a rod pumped well and the on and off cycle of the pump is controlled.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |