Methods and systems for operating a fleet of pumps
A system and method for operating a fleet of pumps for a turbine driven fracturing pump system used in hydraulic fracturing is disclosed. In an embodiment, a method of operating a fleet of pumps associated with a hydraulic fracturing system includes receiving a demand Hydraulic Horse Power (HHP) signal. The demand HHP signal may include the Horse Power (HP) required for the hydraulic fracturing system to operate and may include consideration for frictional and other losses. The method further includes operating all available pump units at a percentage of rating below Maximum Continuous Power (MCP) level, based at least in part on the demand HHP signal. Furthermore, the method may include receiving a signal for loss of power from one or more pump units. The method further includes operating one or more units at MCP level and operating one or more units at Maximum Intermittent Power (MIP) level to meet the demand HHP signal.
1. A method of operating a plurality of pump units associated with a high-pressure, high-power hydraulic fracturing assembly, one or more of the plurality of pump units including a turbine engine connected to a pump, the method comprising:
receiving a demand hydraulic horse power (HHP) signal for operation of the hydraulic fracturing assembly;
based at least in part on the demand HHP signal, operating all available pump units of the plurality of pump units at a first output power to achieve the demand HHP;
receiving a loss of power signal for one or more pump units of the plurality of pump units;
after receiving the loss of power signal, designating the one or more pump units as a reduced power pump unit (RPPU) and the remaining pump units as operating pump units (OPU), the one or more pump units of the OPUs includes at least two pump units;
operating the one or more RPPU at a reduced output power below the first output power;
operating one or more of the OPUs at a second output power by over-firing one or more turbine engines of the one or more OPUs to meet the demand HHP signal for operation of the hydraulic fracturing assembly, the first output power being in a selected range of a maximum continuous power (MCP) level of the plurality of pump units, the second output power being greater than the first output power and being in a selected range of the MCP level to a maximum intermittent power (MIP) level of the plurality of pump units; and
operating one or more of the OPUs at a third output power equal to or greater than the first output power.
2. The method of claim 1 , wherein the third output power comprises an output power level in a selected range to approximately the MIP level.
3. The method of claim 1 , wherein the one or more pump units of the OPUs comprises all of the OPUs, and wherein the second output power comprises the MIP level.
4. The method of claim 1 , wherein the first output power comprises an output power level of 100% of the MCP level.
5. The method of claim 1 , wherein the first output power comprises an output power level of 90% of the MCP level.
6. The method of claim 5 , wherein the second output power comprises an output power level of 107% of the MCP level.
7. The method of claim 6 , wherein the second output power comprises an output power level equal to the MIP level.
8. The method of claim 1 , wherein the second output power comprises the MIP level.
9. The method of claim 1 , further comprising after receiving a loss of power signal, shutting down the one or more RPPU.
10. The method of claim 9 , wherein the reduced output power of the one or more RPPU comprises an output power level approximately 20% less than the first output power.
11. The method of claim 1 , further comprising shutting down the one or more RPPU, and wherein the second output power comprises an output power level of approximately the MIP level.
12. A system to control operation of a plurality of pump units associated with a hydraulic fracturing assembly, one or more of the plurality of pump units including a turbine engine connected to a pump, the system comprising:
a controller in communication with the plurality of pump units, the controller including one or more processors and memory having computer-readable instructions stored therein and operable by the processor to:
receive a demand hydraulic horse power (HHP) signal for the hydraulic fracturing assembly,
based at least in part on the demand HHP signal, operate all available pump units of the plurality of pump units at a first output power to achieve the demand HHP,
receive a loss of power signal from one or more pump units of the plurality of pump units,
after receiving the loss of power signal, designate the one or more pump units as a reduced power pump unit (RPPU) and the computer readable instructions being operable to operate the one or more RPPU at a reduced output power below the first output power,
designate the remaining pump units as operating pump units (OPU), the one or more pump units of the OPUs includes at least two pump units,
operate one or more of the OPUs at a second output power by over-firing one or more turbine engines of the one or more OPUs to meet the demand HHP signal of the hydraulic fracturing assembly, the first output power being in a selected range of a maximum continuous power (MCP) level of the plurality of pump units, the second output power being greater than the first output power and being in a selected range of MCP level to a maximum intermittent power (MIP) level of the plurality of pump units, and
operate one or more of the OPUs at a third output power equal to or greater than the first output power.
13. The system of claim 12 , wherein after receiving the loss of power signal, the computer readable instructions are operable to operate one or more of the OPUs at a third output power, the third output power being in a selected range to the MIP level.
14. The system of claim 13 , wherein the third output power comprises an output power level greater than the first output power.
15. The system of claim 13 , wherein the third output power comprises an output power level of approximately equal to the first output power.
16. The system of claim 12 , wherein the one or more pump units of the OPUs comprises all of the OPUs, and wherein the second output power comprises the MIP level.
17. The system of claim 12 , wherein the first output power comprises an output power level of 100% of the MCP.
18. The system of claim 17 , wherein the second output power comprises 107% of the MCP level.
19. The system of claim 18 , wherein the second output power comprises the MIP level.
20. The system of claim 12 , wherein the first output power comprises an output power level of 90% of the MCP level.
21. The system of claim 12 , wherein the second output power comprises the MIP level.
22. The system of claim 12 , wherein the reduced output power of the RPPU comprises an output power level approximately 20% less than the first output power.
23. The system of claim 12 , wherein after receiving the loss of power signal, the computer readable instructions are operable to shut down the one or more RPPU, and the second output power comprises approximately the MIP level.
24. A system to control operation of a plurality of pump units associated with a hydraulic fracturing assembly, the system comprising:
a turbine engine associated with one or more of the plurality of pump units of the hydraulic fracturing assembly;
a driveshaft associated with the one or more pump units of the hydraulic fracturing assembly;
a gearbox associated with the one or more pump units of the hydraulic fracturing assembly, and connected to the turbine engine and driveshaft, for driving the driveshaft; and
a controller in communication with the plurality of pump units, the controller including one or more processors and memory having computer-readable instructions stored therein and operable by the processor to:
receive a demand hydraulic horse power (HHP) signal for the hydraulic fracturing assembly,
based at least in part on the demand HHP signal, operate all available pump units of the plurality of pump units at a first output power to achieve the demand HHP,
receive a loss of power signal from one or more pump units of the plurality of pump units,
after receiving the loss of power signal, designate the one or more pump units as a reduced power pump unit (RPPU) and the computer readable instructions being operable to operate the one or more RPPU at a reduced output power below the first output power,
designate the remaining pump units as operating pump units (OPU), the one or more pump units of the OPUs includes at least two pump units,
operate one or more of the OPUs at a second output power, and
operate one or more OPUs at a third output power by over-firing one or more turbine engines of the one or more OPUs to meet the demand HHP signal of the hydraulic fracturing assembly,
the first output power being in a selected range of a maximum continuous power (MCP) level of the plurality of pump units, the second output power being greater than the first output power and being in a selected range of MCP level to a maximum intermittent power (MIP) level of the plurality of pump units, and the third output power being equal to or greater than the first output power.
25. The system of claim 24 , wherein after receiving the loss of power signal, the computer readable instructions are operable to shut down the one or more RPPU, and the second output power comprises approximately the MIP level.