Bleeding off a hydraulic fracturing manifold used in oil and gas extraction operations

A method, comprising:

• at least partially depressurizing a hydraulic fracturing discharge manifold to a surface location when the hydraulic fracturing discharge manifold is fluidically isolated from a plurality of hydraulic fracturing pumps, said hydraulic fracturing discharge manifold being operably coupled between the plurality of hydraulic fracturing pumps and one or more wells,
• wherein at least partially depressurizing the hydraulic fracturing discharge manifold to the surface location when the hydraulic fracturing discharge manifold is fluidically isolated from the plurality of hydraulic fracturing pumps comprises:
• opening one or more valves, operably coupled to the hydraulic fracturing discharge manifold when a plurality of additional valves are closed, the plurality of additional valves being:
• operably coupled between the hydraulic fracturing discharge manifold and corresponding ones of the plurality of hydraulic fracturing pumps;
• and
• closable to fluidically isolate the hydraulic fracturing discharge manifold from the plurality of hydraulic fracturing pumps,
• and
• receiving fluid flow to the surface location from the hydraulic fracturing discharge manifold through the one or more valves;
• while at least partially depressurizing the hydraulic fracturing discharge manifold to the surface location, detecting, using one or more sensors, one or more fluid conditions of the hydraulic fracturing discharge manifold;
• and
• based on detecting the one or more fluid conditions of the hydraulic fracturing discharge manifold using the one or more sensors, impeding additional depressurization of the hydraulic fracturing discharge manifold to the surface location,
• wherein impeding additional depressurization of the hydraulic fracturing discharge manifold to the surface location comprises closing, or at least partially closing, the one or more valves.

A non-transitory computer readable medium having stored thereon computer-readable instructions executable by one or more processors to perform operations which comprise:

• at least partially depressurizing a hydraulic fracturing discharge manifold to a surface location when the hydraulic fracturing discharge manifold is fluidically isolated from a plurality of hydraulic fracturing pumps, said hydraulic fracturing discharge manifold being operably coupled between the plurality of hydraulic fracturing pumps and one or more wells,
• wherein at least partially depressurizing the hydraulic fracturing discharge manifold to the surface location when the hydraulic fracturing discharge manifold is fluidically isolated from the plurality of hydraulic fracturing pumps comprises:
• opening one or more valves operably coupled to the hydraulic fracturing discharge manifold when a plurality of additional valves are closed, the plurality of additional valves being:
• operably coupled between the hydraulic fracturing discharge manifold and corresponding ones of the plurality of hydraulic fracturing pumps;
• and
• closable to fluidically isolate the hydraulic fracturing discharge manifold from the plurality of hydraulic fracturing pumps,
• and
• receiving fluid flow to the surface location from the hydraulic fracturing discharge manifold through the one or more valves;
• while at least partially depressurizing the hydraulic fracturing discharge manifold to the surface location, detecting, using one or more sensors, one or more fluid conditions of the hydraulic fracturing discharge manifold;
• and
• based on detecting the one or more fluid conditions of the hydraulic fracturing discharge manifold using the one or more sensors, impeding additional depressurization of the hydraulic fracturing discharge manifold to the surface location,
• wherein impeding additional depressurization of the hydraulic fracturing discharge manifold to the surface location comprises closing, or at least partially closing, the one or more valves.

A system, comprising:

• one or more sensors operably coupled to a hydraulic fracturing discharge manifold,
• wherein the one or more sensors are configured to detect one or more fluid conditions of the hydraulic fracturing discharge manifold while the hydraulic fracturing discharge manifold is at least partially depressurized to a surface location, and
• wherein the hydraulic fracturing discharge manifold is operably coupled between a plurality of hydraulic fracturing pumps and one or more wells;
• and
• one or more valves operably coupled to the hydraulic fracturing discharge manifold,
• wherein a plurality of additional valves are operably coupled between the hydraulic fracturing discharge manifold and corresponding ones of the plurality of hydraulic fracturing pumps,
• wherein the plurality of additional valves are closable to fluidically isolate the hydraulic fracturing discharge manifold from the plurality of hydraulic fracturing pumps,
• wherein the one or more valves are openable when the plurality of additional valves are closed to receive fluid flow therethrough from the hydraulic fracturing discharge manifold, thereby at least partially depressurizing the hydraulic fracturing discharge manifold to the surface location when the hydraulic fracturing discharge manifold is fluidically isolated from the plurality of hydraulic fracturing pumps, and
• wherein the one or more valves are closable, or at least partially closable, based on detection of the one or more fluid conditions of the hydraulic fracturing discharge manifold by the one or more sensors, to thereby impede additional depressurization of the hydraulic fracturing discharge manifold to the surface location.