Patent ID: 8939203
Filing Date: 2015-01-27
Classification: E21B

Abstract:
1. A system, comprising: a pump disposed downhole in a well to create a fluid flow of a pumped fluid through the pump between an Earth surface of the well and a reservoir; a variable speed drive to control a rotational speed of a motor of the pump; a controller operatively connected to the variable speed drive for enhancing a fluid recovery from the reservoir; a control logic in the controller to continually vary a rotational speed of the motor of the pump; the control logic controlling the motor to continually vary a momentum of the pumped fluid inside a pump housing of the pump and inside a production tubing connected to the pump to create reflected cyclic pressure waves against the pump housing and the production tubing; the pump housing and the production tubing transmitting the pressure waves into the reservoir; and a vibrational energy of the pressure waves enhancing the fluid recovery.