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US 8,939,203 B2Granted
Enhancing well fluid recovery
AssigneeSchlumberger Technology Corporation
InventorDavid Eslinger
Life of this patent
Estimating the term…
Abstract
A system usable with a well includes a waveform generator for enhancing fluid recovery from a reservoir by controlling a production pump or an injection pump downhole in the well with waveform signals to create a pressure wave which propagates into the reservoir and enhances the recovery of the fluid.
Claims15
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.
5 more elements
A waveform generator, comprising:
- a waveform generation logic to create a waveform signal for controlling a motor of a downhole pump;
- a connector for transmitting the waveform signal to a speed controller of the motor;
- the waveform generation logic varying a speed of the downhole pump to create changes in a fluid momentum of a fluid being pumped within the downhole pump resulting in pressure waves inside the downhole pump;
- wherein a housing of the downhole pump transmits the pressure waves created by the changes in fluid momentum into the reservoir to increase a flow of a hydrocarbon from the reservoir.
1 more element
Dependencies are inferred from the claim text.