Usable device, in particular for the pumping of an extremely viscous fluid and/or containing a sizeable proportion of gas, particularly for petrol production
US4718824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1984 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Sep 12, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D16/2066
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control process for a rotary pump which is immersed in a fluid produced by a well involves the use of a rotary pump driven by a variable speed motor and comprises the steps of acting upon the rotational speed of the motor according to a pressure difference which exists between the pressure of the fluid measured in the proximity of the pump and the production pressure of the well. The production pressure P of the well being given by the formula: EQU P=P.sub.G -Q/I.sub.p wherein P.sub.G is equal to the pressure of the unused deposit; that is, the pressure of the fluid deposit when the fluid deposit is at rest and there is no production of the well, Q equals the pump flow rate according to the motor rotation speed and I.sub.p is equal to the well productivity indication. The apparatus for carrying out the process includes, in combination, a helicoid rotary pump and an electric motor driving the pump at a speed proportional to the frequency of the electric current fed to the motor and is provided with an arrangement for automatically adjusting the flow delivered by the pump. The adjusting arrangement includes at least one pressure sensor delivering a signal linked to the submergence …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.