Discharge valve disabler and pressure pulse generator therefrom

A method of disabling a pump and/or discharging fluid from the pump such that the discharged fluid exhibits a pulsed flow rate, the method comprising:

• pumping a fluid with the pump, wherein the pump comprises a pump fluid end and a pump power end:
• wherein the pump fluid end comprises:
• one or more chambers, each of the one or more chambers having a fluid inlet and a discharge outlet and comprising a reciprocating element;
• a suction valve assembly configured to control fluid flow into the chamber;
• and a discharge valve assembly configured to control fluid flow out of the chamber, wherein the reciprocating element is at least partially within a reciprocating element bore of the pump fluid end, wherein the reciprocating element bore extends into the pump fluid end from a back end of the pump fluid end and has a central axis;
• and wherein the discharge valve assembly of at least one of the one or more chambers comprises:
• a discharge valve seat, a movable component, and a controllable holding system (CHS), wherein the CHS comprises a discharge valve arrestor comprising a valve arrestor outer ring and a valve arrestor inner ring, connected by one or more connectors, and provides a valve arrestor bore through which an end of the movable component of the discharge assembly passes during opening and closing of the discharge valve assembly, and wherein the CHS is controllable to, when actuated, capture the movable component of the discharge valve assembly and prevent it from returning to the discharge valve seat, thus holding the discharge valve assembly in an open configuration;
• and
• wherein the pump power end is operable to reciprocate the reciprocating element within the reciprocating element bore of the pump fluid end;
• and
• actuating the CHS of one or more of the at least one of the one or more chambers, whereby the discharge valve assembly of the one or more of the at least one of the one or more chambers is held in the open configuration.

A method of servicing a wellbore, the method comprising:

• fluidly coupling a pump to a source of a wellbore servicing fluid and to the wellbore;
• and
• communicating wellbore servicing fluid into a formation in fluid communication with the wellbore via the pump,
• wherein the pump comprises a pump fluid end and a pump power end, wherein the pump fluid end comprises:
• one or more chambers, each of the one or more chambers having a fluid inlet and a discharge outlet and comprising a reciprocating element;
• a suction valve assembly configured to control fluid flow into the chamber;
• and a discharge valve assembly configured to control fluid flow out of the chamber, wherein the reciprocating element is at least partially within a reciprocating element bore of the pump fluid end, wherein the reciprocating element bore extends into the pump fluid end from a back end of the pump fluid end and has a central axis;
• and wherein the discharge valve assembly of at least one of the one or more chambers comprises:
• a discharge valve seat, a movable component, and a controllable holding system (CHS), wherein the CHS comprises a discharge valve arrestor comprising a valve arrestor outer ring and a valve arrestor inner ring, connected by one or more connectors, and provides a valve arrestor bore through which an end of the movable component of the discharge assembly passes during opening and closing of the discharge valve assembly, and wherein the CHS is controllable to, when actuated, capture the movable component of the discharge valve assembly and prevent it from returning to the discharge valve seat, thus holding the discharge valve assembly in an open configuration;
• and
• wherein the pump power end is operable to reciprocate the reciprocating element within the reciprocating element bore of the pump fluid end.