Abstract: A fluid end includes a casing that defines a work space that includes a cross bore space and an inlet bore centered on an inlet bore axis and intersecting the cross bore space, the intersection of the inlet bore and the cross bore space at least partially defined by a first curved edge. An outlet bore is centered on an outlet bore axis and intersects the cross bore space, a plunger bore is centered on a plunger axis and intersects the cross bore space, a first angled surface is defined by the first curved edge, and a second angled surface is disposed adjacent the first angled surface such that the first and second angled surfaces cooperate to define a V-shaped groove having an exterior angle between 180 degrees and 270 degrees.

Abstract: A fluid end of a pump includes a casing defining a plurality of working spaces that each include an inlet bore, an outlet bore, a plunger bore, and a valve cover bore. The bores define a cross bore intersection space, and an inlet bore transition area at the intersection of the inlet bore and the cross bore intersection space. A first V-shaped groove and a second V-shaped groove are formed adjacent the inlet bore transition area with each extending partially around the inlet bore axis. An inlet spring retainer includes first and second engagement portions and is orientable in a first orientation in which the retainer is movable from the inlet bore to the plunger bore and a second orientation in which the retainer engages the first and second V-shaped grooves to inhibit movement of the retainer from the inlet bore to the cross bore intersection space.

Abstract: A fluid end of a pump includes a casing defining a plurality of working spaces that each include an inlet bore centered on an inlet bore axis, an outlet bore centered on a coaxial outlet bore axis, a plunger bore centered on a plunger axis, the plunger axis perpendicular to the inlet bore axis, and a valve cover bore centered on the plunger axis. The inlet bore, the outlet bore, the plunger bore, and the valve cover bore cooperating to define a cross bore intersection space, wherein the casing defines an inlet bore transition area at the intersection of the inlet bore and the cross bore intersection space. A first V-shaped groove is formed adjacent the inlet bore transition area and extends partially around the inlet bore axis and a second V-shaped groove is formed adjacent the inlet bore transition area and extends partially around the inlet bore axis.

Abstract: A fluid end of a high-pressure pump having a bore, a discharge bore, a suction bore, a valve cover bore, and a cross-bore intersection formed in portions of the fluid end. The bore, discharge bore, valve cover bore, and suction bore each having an opening which opens into the cross-bore intersection with the suction and discharge bores substantially orthogonal to the bore. A groove is formed in a wall of the fluid end within in the cross-bore intersection. The groove traverses a curvilinear path around an open space. The groove has a first section and a second section, each section having a first end and a second end. The first and second sections are separated by a gap proximate the bore and valve cover bore. A spring retainer is received into the groove and secured therein for pump operation.

Abstract: A fluid end of a plunger pump has a plunger bore, a discharge bore, a suction bore, a valve cover bore, and a cross-bore intersection formed in portions of the fluid end. The plunger bore, discharge bore, valve cover bore, and suction bore each having an opening which opens into the cross-bore intersection. A valve cover bore axis extends through the opening of the plunger bore which opens into the cross-bore intersection. A groove is formed in the fluid end. The groove traverses a curvilinear path around an open space. Long axes of the discharge bore and suction bore extend into said open space The groove has a first section and a second section. The first section has a first end with a first opening and a second end. The second section has a first end and a second end with an opening. A gap is between said first ends of said first and second sections of said groove. A gap is between said second ends of said first and second sections of said groove. A spring retainer is in the groove.