公开(公告)号：US20220390170A1

公开(公告)日：2022-12-08

申请号：US17340732

申请日：2021-06-07

Applicant: Saudi Arabian Oil Company

Inventor： Khurram Saeed Chishti

IPC: F25J1/00 ,  F25J1/02

Abstract: Systems and methods for controlling a natural gas production system in an upset scenario, and/or during startup of turbo-expander system are disclosed. In one embodiment, a method of operating a Joule-Thomson valve of a natural gas production system includes determining an upset event within the natural gas production system, obtaining a flow rate through at least one expander prior to the upset event, and calculating, based on the flow rate, a percent opening of the Joule-Thomson valve. The method further includes opening the Joule-Thomson valve to the percent opening, controlling the Joule-Thomson valve by a PID controller in a set point tracking mode for a period of time, and controlling the Joule-Thomson valve by the PID controller in an automatic mode.

公开(公告)号：US12007165B2

公开(公告)日：2024-06-11

申请号：US17340732

申请日：2021-06-07

Applicant: Saudi Arabian Oil Company

Inventor： Khurram Saeed Chishti

IPC: F25J1/02 ,  F25J1/00

CPC classification number: F25J1/0022 ,  F25J1/0252 ,  F25J1/0283 ,  F25J1/0298 ,  F25J2210/62 ,  F25J2215/60 ,  F25J2280/50 ,  F25J2290/10

Abstract: Systems and methods for controlling a natural gas production system in an upset scenario, and/or during startup of turbo-expander system are disclosed. In one embodiment, a method of operating a Joule-Thomson valve of a natural gas production system includes determining an upset event within the natural gas production system, obtaining a flow rate through at least one expander prior to the upset event, and calculating, based on the flow rate, a percent opening of the Joule-Thomson valve. The method further includes opening the Joule-Thomson valve to the percent opening, controlling the Joule-Thomson valve by a PID controller in a set point tracking mode for a period of time, and controlling the Joule-Thomson valve by the PID controller in an automatic mode.