Abstract: A valve assembly comprising a valve body, a valve housing, and a spring member coupling the valve body to the valve housing. The spring member is configured to align the contact surface of the valve body with the valve seat inside the valve housing. The spring member can be located on the discharge side of the valve body. The valve assembly may be disposed in a fluid end of a positive displacement pump that is operated to flow a wellbore servicing fluid into a wellbore.

Abstract: A pump comprising a bore pump fluid end having a reciprocating element bore, a discharge valve assembly comprising a discharge valve seat and a discharge valve body, and a suction valve assembly comprising a suction valve seat and a suction valve body; a hollow, cylindrical reciprocating element; a hollow reciprocating element adapter comprising a first end having a fluid inlet opposite a second end having a fluid outlet, wherein the second end of the reciprocating element adapter is connected to and in fluid communication with the fluid intake end of the reciprocating element; a pump power end having a push rod connected to the first end of the reciprocating element adapter; and a movable manifold comprising a reciprocating element end and a fluid intake end, wherein the reciprocating element end of the movable manifold is connected to and in fluid communication with the fluid inlet of the reciprocating element adapter.

Abstract: An apparatus, which may be operated as a heat engine and/or a heat pump, includes moveable separators at a cold side and/or moveable separators at a hot side. Each separator divides a volume into two smaller volumes. Working fluid may be sequentially filled and emptied from volumes between the separators. The separators may move to maintain uniform pressure in the volumes. Hot-side separators may allow for near adiabatic compression/expansion of working fluid. Cold-side separators may allow for near adiabatic expansion/compression of working fluid. Two displacers are positioned between the cold-side separators and the hot-side separators. The displacers are independently actuatable to force working fluid into and out of the volumes between separators and into and out of a variable intermediate volume between the displacers. Heat exchangers, including a warming heat exchanger, are provided to heat, cool, and warm working fluid as it flows between separated volumes and the intermediate volume.

Abstract: An apparatus, which may be operated as a heat engine and/or a heat pump, includes moveable separators at a cold side and/or moveable separators at a hot side. Each separator divides a volume into two smaller volumes. Working fluid may be sequentially filled and emptied from volumes between the separators. The separators may move to maintain uniform pressure in the volumes. Hot-side separators may allow for near adiabatic compression/expansion of working fluid. Cold-side separators may allow for near adiabatic expansion/compression of working fluid. Two displacers are positioned between the cold-side separators and the hot-side separators. The displacers are independently actuatable to force working fluid into and out of the volumes between separators and into and out of a variable intermediate volume between the displacers. Heat exchangers, including a warming heat exchanger, are provided to heat, cool, and warm working fluid as it flows between separated volumes and the intermediate volume.

Abstract: An apparatus, which may be operated as a heat engine and/or a heat pump, includes moveable separators at a cold side and/or moveable separators at a hot side. Each separator divides a volume into two smaller volumes. Working fluid may be sequentially filled and emptied from volumes between the separators. The separators may move to maintain uniform pressure in the volumes. Hot-side separators may allow for near adiabatic compression/expansion of working fluid. Cold-side separators may allow for near adiabatic expansion/compression of working fluid. Two displacers are positioned between the cold-side separators and the hot-side separators. The displacers are independently actuatable to force working fluid into and out of the volumes between separators and into and out of a variable intermediate volume between the displacers. Heat exchangers, including a warming heat exchanger, are provided to heat, cool, and warm working fluid as it flows between separated volumes and the intermediate volume.

Abstract: An apparatus, which may be operated as a heat engine and/or a heat pump, includes moveable separators at a cold side and/or moveable separators at a hot side. Each separator divides a volume into two smaller volumes. Working fluid may be sequentially filled and emptied from volumes between the separators. The separators may move to maintain uniform pressure in the volumes. Hot-side separators may allow for near adiabatic compression/expansion of working fluid. Cold-side separators may allow for near adiabatic expansion/compression of working fluid. Two displacers are positioned between the cold-side separators and the hot-side separators. The displacers are independently actuatable to force working fluid into and out of the volumes between separators and into and out of a variable intermediate volume between the displacers. Heat exchangers, including a warming heat exchanger, are provided to heat, cool, and warm working fluid as it flows between separated volumes and the intermediate volume.

Abstract: An MRAM device comprising an array of MRAM elements, with each element having an MRAM bit influenced by a magnetic field from a current flowing through a conductor, also includes a magnetic keeper formed adjacent the conductor to advantageously alter the magnetic field. The magnetic keeper alters the magnetic field by concentrating the field within the keeper thereby reducing the extent in which fringe field exists, thus allowing the MRAM elements to be formed closer to increase the areal density of the MRAM device. Increase in magnetic field flux due to the magnetic keeper allows operation of the MRAM device with lowered power. Soft magnetic materials such as nickel iron, nickel iron cobalt, or cobalt iron may be used to form the magnetic keeper.

Abstract: An MRAM device comprising an array of MRAM elements, with each element having an MRAM bit influenced by a magnetic field from a current flowing through a conductor, also includes a magnetic keeper formed adjacent the conductor to advantageously alter the magnetic field. The magnetic keeper alters the magnetic field by concentrating the field within the keeper thereby reducing the extent in which fringe field exists, thus allowing the MRAM elements to be formed closer to increase the areal density of the MRAM device. Increase in magnetic field flux due to the magnetic keeper allows operation of the MRAM device with lowered power. Soft magnetic materials such as nickel iron, nickel iron cobalt, or cobalt iron may be used to form the magnetic keeper.

Abstract: An MRAM device comprising an array of MRAM elements, with each element having an MRAM bit influenced by a magnetic field from a current flowing through a conductor, also includes a magnetic keeper formed adjacent the conductor to advantageously alter the magnetic field. The magnetic keeper alters the magnetic field by concentrating the field within the keeper thereby reducing the extent in which fringe field exists, thus allowing the MRAM elements to be formed closer to increase the areal density of the MRAM device. Increase in magnetic field flux due to the magnetic keeper allows operation of the MRAM device with lowered power. Soft magnetic materials such as nickel iron, nickel iron cobalt, or cobalt iron may be used to form the magnetic keeper.

Abstract: An MRAM device comprising an array of MRAM elements, with each element having an MRAM bit influenced by a magnetic field from a current flowing through a conductor, also includes a magnetic keeper formed adjacent the conductor to advantageously alter the magnetic field. The magnetic keeper alters the magnetic field by concentrating the field within the keeper thereby reducing the extent in which fringe field exists, thus allowing the MRAM elements to be formed closer to increase the areal density of the MRAM device. Increase in magnetic field flux due to the magnetic keeper allows operation of the MRAM device with lowered power. Soft magnetic materials such as nickel iron, nickel iron cobalt, or cobalt iron may be used to form the magnetic keeper.