US 12,421,950 B2
Variable diameter valve bores for thru rod fluid ends
Konner Casey Kay, Broken Arrow, OK (US); Adam Bradley Avey, Tulsa, OK (US); and Christopher Calvin Call, Broken Arrow, OK (US)
Assigned to GD ENERGY PRODUCTS, LLC, Tulsa, OK (US)
Filed by GD Energy Products, LLC, Tulsa, OK (US)
Filed on Nov. 22, 2023, as Appl. No. 18/517,054.
Prior Publication US 2025/0163902 A1, May 22, 2025
Int. Cl. F04B 39/10 (2006.01); F04B 43/06 (2006.01); F04B 49/12 (2006.01); F04B 49/18 (2006.01); F04B 53/10 (2006.01)
CPC F04B 39/1046 (2013.01) [F04B 49/12 (2013.01); F04B 49/18 (2013.01); F04B 43/06 (2013.01); F04B 53/1087 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A reciprocating pump, comprising:
a power end configured to generate pumping power;
a fluid end having a fluid end casing including:
an inlet bore having a valve seat located therein, the valve seat having a first inner surface and a flow area defined by a plane extending across the valve seat;
a plunger bore having a second inner surface defining a plunger bore inner diameter;
a first hole extending through the fluid end casing from a first outer surface of the fluid end casing to a second outer surface of the fluid end casing opposite the first outer surface, the first hole having a first longitudinal axis; and
a second hole extending through the fluid end casing from the first outer surface to the second outer surface, the second hole having a second longitudinal axis, the second hole extending parallel to the first hole, the second longitudinal axis is spaced apart from the first longitudinal axis by a first distance; and
a plurality of couplers mounting the fluid end to the power end, the plurality of couplers including a first coupler extending through the first hole and a second coupler extending through the second hole, each of the first coupler and the second coupler is connected at one end to the power end and has a fastener secured to its other end to retain the fluid end casing,
wherein the plunger bore inner diameter divided by the flow area is a first ratio, the first ratio multiplied by the first distance is a second ratio, and the second ratio is less than 22.