Fluid pump health protection

A method, comprising:

• monitoring, by a controller in connection with a fluid pump driven by a motor that is controlled by a variable frequency drive (VFD) and over a time period, a torque of the motor to obtain torque data, a speed of the motor to obtain speed data, and a pressure of the fluid pump to obtain pressure data;
• determining, by the controller, that the fluid pump is associated with a leak of a particular severity level, corresponding to a quantity of thresholds satisfied, based on whether the torque data indicates a deviation that satisfies a first threshold, the speed data indicates a deviation that satisfies a second threshold, and the pressure data indicates a deviation that satisfies a third threshold;
• and
• causing, by the controller and based on the particular severity level of the leak, reduction of the speed of the motor by setting a speed target setting to a minimum speed that provides pressurization by the fluid pump.

A controller, comprising:

• one or more memories;
• and
• one or more processors, communicatively coupled to the one or more memories, configured to:
• monitor, in connection with a fluid pump driven by a motor that is controlled by a variable frequency drive (VFD) and over a time period, at least one of a torque of the motor to obtain torque data, a speed of the motor to obtain speed data, or a pressure of the fluid pump to obtain pressure data;
• determine whether the fluid pump is associated with a leak of a particular severity level based on at least one of the torque data indicating a deviation that satisfies a first threshold, the speed data indicating a deviation that satisfies a second threshold, or the pressure data indicating a deviation that satisfies a third threshold;
• determine, with reference to a table indicating sets of operating parameter values associated with cavitation, a cavitation level associated with operating parameters for the fluid pump and the motor,
• the operating parameters including:
• a proppant percentage of a fracking fluid, and
• one or more other operating parameters,
• the table indicating that at a first value for a proppant percentage of the fracking fluid and one or more other values for the one or more other operating parameters cavitation occurs at a first motor speed,
• the table indicating that at a second, different value for the proppant percentage of the fracking fluid and the same one or more other values for the one or more other operating parameters cavitation occurs at a second, different motor speed,
• the sets of operating parameter values including:
• a first set that includes the first value and the one or more other values, and
• a second set that includes the second, different value and the same one or more other values, and
• the cavitation level indicating a probability that cavitation is to occur;
• and
• cause, via the VFD, reduction of the speed of the motor based on at least one of the particular severity level of the leak or the cavitation level.