US 12,473,910 B2
Fracturing pump arrangement using a plunger with an internal fluid passage
Kelcy Jake Foster, Sulphur, OK (US); Christopher Todd Barnett, Stratford, OK (US); Micheal Cole Thomas, Azle, TX (US); John Keith, Ardmore, OK (US); and Nicholas Son, Davis, OK (US)
Assigned to Kerr Machine Co., Sulphur, OK (US)
Filed by Kerr Machine Co., Sulphur, OK (US)
Filed on Mar. 13, 2025, as Appl. No. 19/078,792.
Claims priority of provisional application 63/574,498, filed on Apr. 4, 2024.
Claims priority of provisional application 63/571,174, filed on Mar. 28, 2024.
Claims priority of provisional application 63/569,201, filed on Mar. 24, 2024.
Claims priority of provisional application 63/565,378, filed on Mar. 14, 2024.
Prior Publication US 2025/0290505 A1, Sep. 18, 2025
Int. Cl. F04B 53/12 (2006.01); F04B 53/16 (2006.01); E21B 43/26 (2006.01)
CPC F04B 53/125 (2013.01) [F04B 53/129 (2013.01); F04B 53/164 (2013.01); F04B 53/166 (2013.01); E21B 43/2607 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A fluid end, comprising:
a first section comprising a plurality of plunger bores formed therein, each plunger bore joining opposed first and second threaded openings formed in the first section;
a plurality of second sections, each second section configured to thread at least partially into a selected one of the second threaded openings, each second section comprising a through bore coaxially aligned with a selected plunger bore; and
a plurality of reciprocating plungers, each plunger configured to extend at least partially within a selected through bore and at least partially within a selected plunger bore, in which each plunger comprises:
a first end and an opposed second end;
a blind suction bore formed on the first end;
a suction fitting bore formed perpendicular to the suction bore;
a sleeve installed within the suction bore; and
a valve seat installed within the first end of the plunger such that the sleeve is situated intermediate the valve seat and the second end of the plunger;
in which the number of second sections is the same as the number of plunger bores.
 
7. A fluid end, comprising:
a housing comprising a plurality of bores formed therein; and
a plunger configured to reciprocate within a selected one of the plurality of bores, the plunger comprising:
a first end having a blind bore formed therein;
a second end opposed to the first end;
an exterior surface interconnecting the first and second ends, the exterior surface having a suction fitting bore formed therein;
a valve seat installed within the first end of the plunger;
a sleeve installed within the blind bore; and
a valve assembly installed at least partially within the blind bore, the valve assembly comprising:
a valve body configured to engage the valve seat;
a stem joined to the valve body;
a retainer surrounding at least a portion of the stem; and
a spring configured to bias the valve body against the valve seat;
in which the sleeve is configured to receive a portion of the retainer;
in which the retainer is situated intermediate the valve body and the spring.