US 12,234,819 B2
Fluid end
Mark S. Nowell, Ardmore, OK (US); Kelcy Jake Foster, Ardmore, OK (US); Christopher Todd Barnett, Stratford, OK (US); Brandon Scott Ayres, Ardmore, OK (US); Michael Eugene May; Guy J. Lapointe, Sulphur, OK (US); and Micheal Cole Thomas, Ardmore, OK (US)
Assigned to Kerr Machine Co., Sulphur, OK (US)
Filed by Kerr Machine Co., Sulphur, OK (US)
Filed on Oct. 10, 2023, as Appl. No. 18/483,871.
Application 18/483,871 is a continuation of application No. 17/902,328, filed on Sep. 2, 2022, granted, now 11,788,527.
Application 17/902,328 is a continuation of application No. 17/194,461, filed on Mar. 8, 2021, granted, now 11,434,901, issued on Sep. 6, 2022.
Application 17/194,461 is a continuation of application No. 16/708,773, filed on Dec. 10, 2019, granted, now 10,941,765, issued on Mar. 9, 2021.
Claims priority of provisional application 62/859,256, filed on Jun. 10, 2019.
Claims priority of provisional application 62/777,705, filed on Dec. 10, 2018.
Prior Publication US 2024/0035468 A1, Feb. 1, 2024
Int. Cl. F04B 53/16 (2006.01); E21B 43/26 (2006.01); F04B 37/12 (2006.01); F04B 53/00 (2006.01); F04B 53/22 (2006.01)
CPC F04B 53/16 (2013.01) [E21B 43/2607 (2020.05); F04B 37/12 (2013.01); F04B 53/007 (2013.01); F04B 53/164 (2013.01); E21B 43/26 (2013.01); F04B 53/22 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A fluid end, comprising:
a fluid end body, comprising:
a plurality of bore pairs formed therein, in which each bore pair comprises intersecting horizontal and vertical bores; and
a plurality of internally threaded openings formed therein;
a plurality of stuffing boxes, each stuffing box comprising:
a central passage; and
a plurality of peripheral passages formed therein;
a plurality of fasteners, in which each fastener is positioned within one of the peripheral passages, and in which the fasteners are configured to thread into the internally threaded openings to attach the stuffing box to the fluid end body;
a plurality of plungers, in which each plunger is positioned inside one of the central passages, and in which the plungers are configured to laterally reciprocate within the central passages and the horizontal bores formed in the fluid end body; and
a plurality of plunger packings, each plunger packing installed within the central passage of a corresponding one of the plurality of stuffing boxes; and
a plurality of packing nuts, each packing nut attached to a corresponding one of the stuffing boxes and engaging a corresponding one of the plurality of plunger packings.