SYSTEM AND METHOD FOR IDENTIFYING A MODE OF FAILURE IN A PUMP USED IN HYDRAULIC FRACTURING

• US 20160168979A1
• Filed: 12/16/2014
• Published: 06/16/2016
• Est. Priority Date: 12/16/2014
• Status: Abandoned Application

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Dandibhotla, Venkata Bhagavathi, Zhang, Yanchai, Jacobson, Evan Earl, Padarthy, Koti Ratnam
• Application Number:
  US14/571,727
• Publication Number:
  US 20160168979A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: E21B 43/2607 Surface equipment specially adapted for fracturing operations
• CPC Class Codes: E21B 47/008 Monitoring of down-hole pump systems, e.g. for the detection of "pumped-off" conditions
• CPC Class Codes: E21B 47/06 Measuring temperature or pressure
• CPC Class Codes: G01M 10/00 Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels

Abstract

A method for identifying a mode of failure in a pump includes receiving and recording a first set of flow rate pressure values over a specified time period to determine an existing hydraulic signature of the pump. The method then includes receiving and recording real-time flow rate pressure values over a subsequent period of time to determine a current hydraulic signature of the pump. The method further includes comparing the real-time flow rate pressure values to the first set of flow rate pressure values to detect variances in the hydraulic signature and output a mode of failure for the pump.

Claims

1. A method for identifying a mode of failure in a pump, the method comprising:

receiving and recording a first set of flow rate pressure values over a specified time period to determine an existing hydraulic signature of the pump;

receiving and recording real-time flow rate pressure values over a subsequent period of time to determine a current hydraulic signature of the pump; and

comparing the real-time flow rate pressure values to the first set of flow rate pressure values to detect variances in the hydraulic signature and output a mode of failure for the pump.

2. The method of claim 1, wherein the first set of flow rate pressure values is obtained from a pressure sensor associated with one of a suction manifold, a discharge manifold, and a cylinder of the pump.

3. The method of claim 1, wherein the first set of flow rate pressure values over the specified time period is representative of historical performance of the pump.

4. The method of claim 1, wherein the real-time flow rate pressure values over the subsequent period of time is representative of current performance of the pump.

5. The method of claim 1, wherein the first set of flow rate pressure values and the real-time flow rate pressure values are recorded in a memory device.

6. The method of claim 1 further comprising determining a service life of the pump before failure.

7. The method of claim 1 further comprising displaying the mode of failure for the pump, and a service life remaining before failure of the pump on a display device.

8. The method of claim 1 further comprising modulating an operation of the pump based on the comparison between the real-time flow rate pressure values and the first set of flow rate pressure values associated with the pump.

9. The method of claim 1 further comprising comparing the current hydraulic signature of the pump to a historical hydraulic signature of the pump to detect variances in the hydraulic signature and output a mode of failure for the pump.

10. A system for identifying a mode of failure in a pump, the system comprising:

at least one pressure sensor associated with at least one of a suction manifold, a discharge manifold, and a cylinder of the pump to output pressure values associated with the at least one of the suction manifold, the discharge manifold, and the cylinder of the pump;

a historical dataset comprising a first set of flow rate pressure values obtained from the at least one pressure sensor, the first set of flow rate pressure values obtained over a specified time period to determine an existing hydraulic signature of the pump;

a data acquisition engine configured to obtain real-time flow rate pressure values from the at least one pressure sensor, the real-time flow rate pressure values measured during a current operating condition of the pump to determine a current hydraulic signature of the pump; and

a comparison engine in communication with the historical dataset, and the data acquisition system, the comparison engine configured to compare the real-time flow rate pressure values to the first set of flow rate pressure values to detect variances in the hydraulic signatures and output a mode of failure for the pump.

11. The system of claim 10, wherein the at least one pressure sensor comprises:

a first pressure sensor located in the suction manifold of the pump and configured to output a flow rate pressure value associated with the suction manifold;

a second pressure sensor located in the discharge manifold of the pump and configured to output a flow rate pressure value associated with the discharge manifold;

a plurality of third pressure sensors, wherein at least one third pressure sensor is located in each cylinder of the pump such that the third pressure sensors are configured to output a flow rate pressure value associated with the cylinders of the pump.

12. The system of claim 10 further comprising a controller disposed in communication with the comparison engine, the controller configured to determine a location of a leak as being in at least one of a suction valve associated with the suction manifold, a discharge valve associated with the discharge manifold, and packing associated with one or more cylinders of the pump.

13. The system of claim 12, wherein the controller is configured to modulate the operation of the pump based on the comparison between the real-time flow rate pressure values and the first set of flow rate pressure values.

14. The system of claim 10, wherein the comparison engine is configured to determine a service life of the pump before failure.

15. The system of claim 10, further comprising a memory device in communication with the comparison engine, the memory device configured to store the first set of flow rate pressure values and the real-time flow rate pressure values therein.

16. The system of claim 10 further comprising a display device disposed in communication with the comparison engine, the display device configured to display the comparison between the existing hydraulic signature and the current hydraulic signature of the pump.

17. The system of claim 10, wherein the controller is configured to analyze flow rate pressure values from the first pressure sensor, the second pressure sensor, and the third pressure sensors in a time-frequency domain.

18. A non-transitory computer-readable medium having stored thereon sequences of instruction, the sequences of instruction including instruction which when executed by a computer-based system for identifying a mode of failure in a pump, causes the computer-based system to perform operations, comprising:

receiving and recording, by the computer based system, a first set of flow rate pressure values over a specified time period to determine an existing hydraulic signature of the pump;

receiving and recording, by the computer based system, real-time flow rate pressure values over a subsequent period of time to determine a current hydraulic signature of the pump; and

comparing, by the computer based system, the real-time flow rate pressure values to the first set of flow rate pressure values to detect variances in the hydraulic signature and output a mode of failure for the pump.