DUAL PUMP VFD CONTROLLED MOTOR ELECTRIC FRACTURING SYSTEM
The present invention provides a method and system for providing on-site electrical power to a fracturing operation, and an electrically powered fracturing system. Natural gas can be used to drive a turbine generator in the production of electrical power. A scalable, electrically powered fracturing fleet is provided to pump fluids for the fracturing operation, obviating the need for a constant supply of diesel fuel to the site and reducing the site footprint and infrastructure required for the fracturing operation, when compared with conventional systems.
1 . A system, comprising:
a dedicated electric power source comprising at least one transportable electric turbine generator;
a blender tub;
a fluid additive system;
a fluid addition source hopper;
an inlet electric motor driving an inlet pump in communication with a fluid additive source and configured to pump the fluid additive source into and out of the blender tub;
an electrical transformer configured to step down voltage from the at least one transportable electric turbine generator to a voltage appropriate for one or more blender motors;
a variable frequency drive in electrical communication with the one or more blender motors; and
a control system in communication with the electric blender system, the variable frequency drive, and a fracturing fluid pump, the control system configured to regulate delivery of blended fracturing fluid from the blender tub to the fracturing fluid pump to provide fracturing fluid to a wellbore at a controlled pressure.
2 . The system of claim 1 , wherein the electric blender system comprises:
a blender tub;
a fluid additive system;
a fluid addition source hopper; and
an inlet electric motor configured to drive an inlet pump, in communication with a fluid additive source and configured to pump the fluid additive source into and out of the blender tub.
3 . The system of claim 1 , further comprising a plunger-style fracturing pump coupled to the at least one electric motor associated with the trailer.
4 . The system of claim 1 , further comprising a control system in communication with the plurality of fracturing modules and the electric blender system.
5 . The system of claim 4 , wherein the control system is configured to regulate delivery of treatment fluid from the blender system to the fracturing fluid pump into a wellbore.
6 . The system of claim 1 , wherein the drive comprises a variable frequency drive in communication with one or more of the electric motors,
7 . The system of claim 6 , wherein the variable frequency drive is configured to control the speed of a fracturing fluid motor.
8 . The system of claim 4 , wherein the control system in communication with a fracturing fluid pump and motor is configured to monitor a fracturing fluid pressure of a fracturing fluid pump.
9 . The system of claim 5 , wherein the control system is configured to communicate with one or more variable frequency drives to provide fracturing fluid to the wellbore at a constant pressure.
10 . The system of claim 1 , further comprising an electrical transformer in electrical communication with the at least one transportable electric turbine generator.
11 . The system of claim 10 , wherein the electrical transformer is configured to step down a voltage from the at least one transportable electric turbine generator to a voltage appropriate for at least one of the electric motors.
12 . The system of claim 1 , wherein the at least one transportable turbine generator is configured to provide a dedicated source of electrical power for fracturing operations at a wellbore.
13 . A method of delivering pressurized fluid to a wellbore to be fractured, comprising:
providing a dedicated electric power source including at least one transportable electric turbine generator;
supplying electrical power from the at least one transportable electric turbine generator through an electrical transformer configured to step down voltage to a level appropriate for one or more blender motors;
operating a variable frequency drive in electrical communication with the one or more blender motors;
providing an electric blender system comprising a blender tub, a fluid additive system, and a fluid addition source hopper;
actuating an electric motor to drive an inlet pump in communication with a fluid additive source to pump the fluid additive source into and out of the blender tub;
blending the fluid additive with a base fluid within the blender tub to form a blended fracturing fluid; and
regulating, via a control system in communication with the electric blender system, the variable frequency drive, and a fracturing fluid pump, delivery of the blended fracturing fluid from the blender tub to the fracturing fluid pump to provide the fracturing fluid to a wellbore at a controlled pressure.
14 . The method of claim 13 , wherein the one or more blender motors are coupled to an inlet electric motor configured to drive an inlet pump, in communication with a fluid additive source and configured to pump the fluid additive source into and out of the blender tub.
15 . The method of claim 13 , further comprising providing a variable frequency drive in communication with the electric motor, wherein the variable frequency drive is configured to control the speed of the electric motor.
16 . The method of claim 13 , further comprising providing the control system in communication with the electric motor and the at least one transportable electric turbine generators.
17 . The method of claim 16 , wherein the control system is configured to monitor a fracturing fluid pressure of a fracturing fluid pump.
18 . The method of claim 13 , further comprising providing the control system configured to communicate with one or more variable frequency drives to provide fracturing fluid to the wellbore at a constant pressure.
19 . The method of claim 13 , further comprising providing an electrical transformer in electrical communication with the at least one transportable electric turbine generator.
20 . The method of claim 19 , wherein the electrical transformer steps down a voltage from the at least one transportable electric turbine generator to a voltage appropriate for the electric motor.