Patent ID: 11867043
Assignee: KLX ENERGY SERVICES LLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  F | IPC E  F

Claim 21:
22. A pressure control system for a hydraulic fracturing operation at a well site, comprising:
a high pressure frac line;
a system controller;
a pressure relief valve system, comprising:
a first fluid bypass line having a fluid inlet and an opposing fluid outlet, wherein the fluid inlet for the fluid bypass line is in fluid communication with the high pressure frac line;
a pressure sensor residing proximate the fluid inlet and configured to sense fluid pressure within the high pressure frac line, and to generate electrical signals representative of fluid pressure readings within the high pressure frac line in real time;
one or more electraulically-actuated valves configured to move between an open state and a closed state in response to command signals from the system controller;

a pressure bleed-off valve, comprising:
a second fluid bypass line having a fluid inlet and an opposing fluid outlet, and wherein the fluid inlet for the second fluid bypass line is also in fluid communication with the high pressure frac line;
a high pressure transducer located proximate the fluid inlet for the second bypass line;
a first plug valve residing along the fluid bypass line;
a first electric actuator residing along the first plug valve and configured to rotate the first plug valve between open and close positions; and

wherein the system controller is configured to:
(i) receive the electrical signals from the pressure sensor, and process those signals by comparing fluid pressure readings with a stored pressure threshold, wherein the system controller is programmable to set the stored pressure threshold and to send actuation signals to open the one or more electraulically-actuated valves in response to determining that the pressure along the high pressure frac line meets or exceeds the stored pressure threshold; and
(ii) send command signals to the first actuator of the pressure bleed-off system to rotate the first plug valve between open and close positions, and wherein the system controller is configured to receive control instructions from an operator remote from the pressure control system.