公开(公告)号：US20230287775A1

公开(公告)日：2023-09-14

申请号：US17654515

申请日：2022-03-11

Applicant: Caterpillar Inc.

Inventor： Andy PUBLES ,  Mark Francis GRIMES ,  Riadh BENGUEDDA ,  Yuesheng HE ,  Mark C. PAUL ,  Todd Ryan KABRICH

IPC: E21B43/26 ,  F04B49/02 ,  F04B49/06 ,  F04B49/20

CPC classification number: E21B43/2607 ,  F04B49/02 ,  F04B49/065 ,  F04B49/20 ,  F04B17/03

Abstract: A controller that is associated with a pump system causes a power ramp rate of a motor of the pump system to have an initial power ramp rate. The controller monitors, after causing the power ramp rate of the motor to have the initial power ramp rate, a frequency of a power bus. One or more power sources provide power to the pump system via the power bus. The controller causes, based on monitoring the frequency of the power bus, the power ramp rate of the motor to be modified.

公开(公告)号：US20230243348A1

公开(公告)日：2023-08-03

申请号：US17649531

申请日：2022-01-31

Applicant: Caterpillar Inc.

Inventor： Andy PUBLES ,  Mark C. PAUL ,  Mark Francis GRIMES ,  Todd Ryan KABRICH ,  Riadh BENGUEDDA

IPC: F04B49/06 ,  F04B51/00 ,  E21B43/26

CPC classification number: F04B49/06 ,  F04B51/00 ,  E21B43/2607

Abstract: In some implementations, a controller may obtain a setting for a target discharge pressure associated with a fluid pump driven by a motor that is controlled by a variable frequency drive (VFD). The target discharge pressure may be for use in a pressure test of a system that includes the fluid pump. The controller may determine a target torque for the motor that achieves the target discharge pressure. The controller may cause, via the VFD and in connection with the pressure test, adjustment to a speed of the motor to achieve the target torque for the motor.

公开(公告)号：US20240052826A1

公开(公告)日：2024-02-15

申请号：US17819778

申请日：2022-08-15

Applicant: Caterpillar Inc.

Inventor： Yuesheng HE ,  Andy PUBLES ,  Mark C. PAUL ,  Mark Francis GRIMES

IPC: F04B49/06 ,  E21B43/26

CPC classification number: F04B49/065 ,  E21B43/26

Abstract: In some implementations, a controller may monitor, in connection with a fluid pump driven by a motor that is controlled by a variable frequency drive 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. The controller may determine that the fluid pump is associated with a leak of a particular severity level based on the torque data indicating a deviation that satisfies a first threshold, the speed data indicating a deviation that satisfies a second threshold, and the pressure data indicating a deviation that satisfies a third threshold. The controller may perform at least one operation based on the particular severity level of the leak.

公开(公告)号：US20230243351A1

公开(公告)日：2023-08-03

申请号：US17649525

申请日：2022-01-31

Applicant: Caterpillar Inc.

Inventor： Mark Francis GRIMES ,  Andy PUBLES ,  Mark C. PAUL

IPC: F04B49/20 ,  F04B49/06 ,  E21B43/26

CPC classification number: F04B49/20 ,  F04B49/065 ,  E21B43/26 ,  F04B2203/0207 ,  F04B2203/0209 ,  F04B2203/0204 ,  F04B2205/04

Abstract: In some implementations, a controller may obtain a setting for a maximum discharge pressure associated with a fluid pump that is to be allowed during a hydraulic fracturing operation. The fluid pump may be driven by a motor that is controlled by a variable frequency drive (VFD). The controller may determine a maximum torque for the motor that achieves the maximum discharge pressure. The controller may cause, via the VFD, adjustment to a speed of the motor to maintain a torque of the motor at or below the maximum torque for the motor.