Abstract: A fluid end assembly of a hydraulic fluid pump includes a housing, a plug member, a lock cover, and at least one retention pin. The housing may include at least one bore. The plug member may be positioned at least partially within the at least one bore. The lock cover may be coupled to the housing and configured to retain the plug member within the at least one bore during operation of the fluid end assembly. The at least one retention pin may extend at least partially through a portion of the lock cover to retain the lock cover in a rotational position that retains the plug member at least partially within the bore.

Abstract: A retaining assembly for coupling a fluid end component to a fluid end casing. The retaining assembly includes a pair for clamp members, each of which has a pair of rails that define a wedge-shaped groove therebetween. The groove applying an increasing amount of pre-load force or tension to a flange of the fluid end components and a flange of the fluid end casing to drive them together. The amount of pre-load tension applied can vary and can be determined by the user and amount of tightening of the clamp members.

Abstract: A fluid end assembly of a hydraulic fluid pump includes a housing, a plug member, a lock cover, and at least one retention pin. The housing may include at least one bore. The plug member may be positioned at least partially within the at least one bore. The lock cover may be coupled to the housing and configured to retain the plug member within the at least one bore during operation of the fluid end assembly. The at least one retention pin may extend at least partially through a portion of the lock cover to retain the lock cover in a rotational position that retains the plug member at least partially within the bore.

Abstract: A method of closing an externally open segment of a fluid end of a reciprocating pump with a closure assembly includes inserting a non-circular closure element into a segment of a fluid end casing in a first direction while the non-circular closure element is disposed in a first orientation. The non-circular closure element is rotated to a second orientation that is angularly offset from the first orientation with respect to at least one axis of rotation. The non-circular closure element is further moved within the segment of the fluid end casing in a second direction that is opposite the first direction to cause the non-circular closure element to seat within the segment.

Abstract: A closure element for a fluid end of a reciprocating pump is installable within a segment of a casing of the fluid end to substantially close the segment. The closure element includes a main body that extends from an interior surface to an exterior surface, and at least a portion of the main body has a non-circular cross-sectional shape. A fluid end for the closure element may include a plurality of segments and at least a portion of at least one segment of the plurality of segments may have a non-circular cross-sectional shape configured to receive and secure a closure element with a non-circular cross-sectional shape.

Abstract: A closure element for a fluid end of a reciprocating pump is installable within a segment of a casing of the fluid end to substantially close the segment. The closure element includes a main body that extends from an interior surface to an exterior surface, and at least a portion of the main body has a non-circular cross-sectional shape. A fluid end of the closure element may include a plurality of segments and at least a portion of at least one segment of the plurality of segments may have a non-circular cross-sectional shape configured to receive and secure a closure element with a non-circular cross-sectional shape.

Abstract: A fluid end assembly of a hydraulic fluid pump includes a housing, a plug member, a lock cover, and at least one retention pin. The housing may include at least one bore. The plug member may be positioned at least partially within the at least one bore. The lock cover may be coupled to the housing and configured to retain the plug member within the at least one bore during operation of the fluid end assembly. The at least one retention pin may extend at least partially through a portion of the lock cover to retain the lock cover in a rotational position that retains the plug member at least partially within the bore.

Abstract: A method of assembling a fluid end includes inserting a valve through a bore of a housing of the fluid end and into an interior volume of the fluid end, inserting a valve cover into the bore such that the valve cover seals the bore, and coupling a lock cover to the housing, the lock cover positioned over the bore to prevent removal of the valve cover from the bore. When the lock cover is coupled to the housing, the lock cover does not apply a preload against the valve cover.

Abstract: A method of assembling a fluid end includes inserting a valve through a bore of a housing of the fluid end and into an interior volume of the fluid end, inserting a valve cover into the bore such that the valve cover seals the bore, and coupling a lock cover to the housing, the lock cover positioned over the bore to prevent removal of the valve cover from the bore. When the lock cover is coupled to the housing, the lock cover does not apply a preload against the valve cover.

Abstract: A method of assembling a fluid end includes inserting a valve through a bore of a housing of the fluid end and into an interior volume of the fluid end, inserting a valve cover into the bore such that the valve cover seals the bore, and coupling a lock cover to the housing, the lock cover positioned over the bore to prevent removal of the valve cover from the bore. When the lock cover is coupled to the housing, the lock cover does not apply a preload against the valve cover.

Abstract: A method of assembling a fluid end includes inserting a valve through a bore of a housing of the fluid end and into an interior volume of the fluid end, inserting a valve cover into the bore such that the valve cover seals the bore, and coupling a lock cover to the housing, the lock cover positioned over the bore to prevent removal of the valve cover from the bore. When the lock cover is coupled to the housing, the lock cover does not apply a preload against the valve cover.

Abstract: A well servicing pump includes a power end and a fluid end operably coupled to the power end. The fluid end includes a casing that defines at least one pumping chamber, the pumping chamber at least partially defined by a spherical wall, and a first cylindrical wall extending along a first axis and defining a portion of a power end bore, the first cylindrical wall intersecting the spherical wall to define a first interface edge. A second cylindrical wall extends along a second axis and defines a portion of a discharge bore, the second cylindrical wall intersecting the spherical wall to define a second interface edge, and a third cylindrical wall extends along a third axis and defines a portion of a suction bore, the third cylindrical wall intersecting the spherical wall to define a third interface edge, wherein the first axis, the second axis, and the third axis are arranged between 100 and 140 degrees with respect to one another.

Abstract: A pump including a housing defining a plurality of inlet bores. A first interior wall is arranged to at least partially define a first of the plurality of inlet bores. The first interior wall has a contour in a cross section taken normal to the plunger axes. The first interior wall is at least partially defined by the revolution of the contour about a first inlet axis that is normal to and intersects a first of the plurality of plunger axes. The contour includes a cylindrical portion arranged parallel to the first inlet axis, a planar portion extending in a direction perpendicular to the first inlet axis and spaced a first distance from the plunger axis, and a convex bulge portion extending from the cylindrical portion and spaced a second distance from the plunger axis. The contour further includes a V-shaped groove portion extending from the convex bulge portion.

Abstract: A well servicing pump includes a power end and a fluid end operably coupled to the power end. The fluid end includes a casing that defines at least one pumping chamber, the pumping chamber at least partially defined by a spherical wall, and a first cylindrical wall extending along a first axis and defining a portion of a power end bore, the first cylindrical wall intersecting the spherical wall to define a first interface edge. A second cylindrical wall extends along a second axis and defines a portion of a discharge bore, the second cylindrical wall intersecting the spherical wall to define a second interface edge, and a third cylindrical wall extends along a third axis and defines a portion of a suction bore, the third cylindrical wall intersecting the spherical wall to define a third interface edge, wherein the first axis, the second axis, and the third axis are arranged between 100 and 140 degrees with respect to one another.

Abstract: A pump including a housing defining a plurality of inlet bores. A first interior wall is arranged to at least partially define a first of the plurality of inlet bores. The first interior wall has a contour in a cross section taken normal to the plunger axes. The first interior wall is at least partially defined by the revolution of the contour about a first inlet axis that is normal to and intersects a first of the plurality of plunger axes. The contour includes a cylindrical portion arranged parallel to the first inlet axis, a planar portion extending in a direction perpendicular to the first inlet axis and spaced a first distance from the plunger axis, and a convex bulge portion extending from the cylindrical portion and spaced a second distance from the plunger axis. The contour further includes a V-shaped groove portion extending from the convex bulge portion.

Abstract: A fluid end of a high-pressure pump having a power end bore, a discharge bore, a suction bore, an access bore, and a cross-bore intersection formed in portions of the fluid end is provided. A transitional open area opens into the cross-bore intersection from the power end bore; a transitional open area opens into the cross-bore intersection from the access bore; a transitional open area opens into the cross-bore intersection from the suction bore; and a transitional open area opens into the cross-bore intersection from the discharge bore. A spherical geometry is created in the cross-bore intersection. A spherical surface forms an outer boundary of the cross-bore intersection.

Abstract: A fluid end of a high-pressure pump having a power end bore, a discharge bore, a suction bore, an access bore, and a cross-bore intersection formed in portions of the fluid end is provided. A transitional open area opens into the cross-bore intersection from the power end bore; a transitional open area opens into the cross-bore intersection from the access bore; a transitional open area opens into the cross-bore intersection from the suction bore; and a transitional open area opens into the cross-bore intersection from the discharge bore. A spherical geometry is created in the cross-bore intersection. A spherical surface forms an outer boundary of the cross-bore intersection.