Patents by Inventor Francois-Jean Trocqueme

Francois-Jean Trocqueme has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Usable device, in particular for the pumping of an extremely viscous fluid and/or containing a sizeable proportion of gas, particularly for petrol production
    Patent number: 4718824
    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:P=P.sub.G -Q/I.sub.pwherein 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.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: January 12, 1988
    Assignee: Institut Francais du Petrole
    Inventors: Henri Cholet, Francois-Jean Trocqueme, Jean Garraux