US3887305A - Reciprocating pump - Google Patents

Reciprocating pump Download PDF

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Publication number
US3887305A
US3887305A US351825A US35182573A US3887305A US 3887305 A US3887305 A US 3887305A US 351825 A US351825 A US 351825A US 35182573 A US35182573 A US 35182573A US 3887305 A US3887305 A US 3887305A
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United States
Prior art keywords
plunger
cylindrical casing
lantern ring
discharge
sealing member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US351825A
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English (en)
Inventor
Kazuichi Ito
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Individual
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Individual
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Publication of US3887305A publication Critical patent/US3887305A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/125—Reciprocating valves
    • F04B53/126—Ball valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/164—Stoffing boxes

Definitions

  • a reciprocating p p comprising: a cylinder having a discharge check valve in the neighborhood of an end [2%] $5.81. 417/439, 4l7/55429a/86j thereof; a diaphragm or a bellows forming 3 'l 2 phragm chamber with a recess at the other end of said 1 0 care 417 439.
  • a plunger driving means casing holding said I ,3 diaphragm or bellows between itself and said cylinder; a hollow tubular plunger connected at an end with [56] Refemnces cued said diaphragm and having at the other end a plunger UNITED STATES PATENTS check valve; a conduit for connecting a liquid inlet 1,584,843 5/ 1926 Carroll 417/437 means communicating with said cylinder and said dia- ,73 H 31 Per ons 4l7/439 phragm chamber; and a partition dividing the inside of i 5 2 7 said cylinder between a suction side chamber and a 5 ton....
  • the present invention relates to a reciprocating pump incorporating a plunger and a diaphragm or bellows and having superior characteristics in safety, uniformity in pumping volume, durability, and high pressure applicability.
  • Prior art liquid suction and discharge means of this type may be classified into two main types, namely a plunger type reciprocating pump and a diaphragm type reciprocating pump.
  • the plunger type reciprocating pump has a disadvantage in that it is difficult to completely prevent leakage of liquid from a gland packing. In such a plunger reciprocating pump which is completely sealed at first, the gland packing and the plunger itself are worn through daily usage for years resulting in leakage of the liquid.
  • This disadvantage of the plunger reciprocating pump becomes a serious difficulty when it is used with a poisonous liquid, an airhardening liquid, or a liquid corrosive to the materials constructing the pump.
  • the diaphragm type reciprocating pump though free from the disadvantage inherent in the plunger reciprocating pump, has disadvantages in that its pumping is inferior in uniformity in volume to the plunger reciprocating pump and that the life of the diaphragm is exceedingly short since it is subjected to high pressure on the discharge side.
  • the reciprocating pump according to the present invention has the advantages of both the plunger type and the diaphragm type reciprocating pumps while obviating the disadvantages thereof.
  • the primary object of the present invention is to provide a reciprocating pump having the characteristic of the diaphragm type reciprocating pump, namely resistance to leakage while keeping the characteristics of the plunger type reciprocating pump, namely uniformity in pumping volume and high discharge pressure (high lift).
  • Another object of this invention is to provide a reciprocating pump obviating the disadvantage of the plunger type reciprocating pump in which the gland packing is exposed to the atmosphere and which has the advantage that the leaked liquid is sent back to the suction side.
  • Still another object of this invention is to provide a reciprocating pump obviating another disadvantage of the plunger type reciprocating pump, namely the danger that the liquid leaks through the gland packing into the plunger drive means by adopting the advantage of the sealed construction of the diaphragm type reciprocating pump.
  • Yet another object of this invention is to provide a reciprocating pump having the advantage that the diaphragm is exposed only to the low pressure on the suction side in order to overcome the disadvantage of the diaphragm that it is too weak to stand the high discharge pressure.
  • a further object of this invention is to provide a reciprocating pump having the advantage that the pressure on the gland packing is freely controlled from the outside of the pump.
  • the reciprocating pump according to the present invention comprises:
  • a cylinder provided with a discharge valve case means having a discharge check valve in the neighborhood of an end thereof, a recess at the other end, and a liquid inlet means in the neighborhood of the other end;
  • a plunger driving means casing having an opening provided with a peripheral wall for holding said diaphragm or bellows between itself and the peripheral walls of the other end of said cylinder;
  • a hollow tubular plunger connected at an end to a crosshead reciprocably received within said casing and to said diaphragm or bellows, having at the other end a plunger check valve, and having in the neighborhood of the other end an inlet port;
  • a lantern ring provided in the neighborhood of said liquid inlet means within said cylinder, and having a bore for communicating with said liquid inlet means and a hole for receiving said plunger therethrough;
  • a gland packing extra tightening means comprising: a gland packing gland having a ring-shaped end urged against the discharge chamber side surface of the gland packing at said discharge chamber side, said ringshaped end being connected with the other end by means of a plurality of legs; and an adjust screw having the tip thereof urged against said other end of said gland packing gland and the head end thereof being operable from the outside of said one end of said cylinder.
  • FIG. I is a sectional view of an embodiment of the reciprocating pump according to the present invention.
  • FIGS. 2 and 3 are sectional views showing the manner in which the apparatus of the invention operates.
  • an embodiment of the present invention has a pump body A comprising cylindrical casing B and a plunger driving means housing C.
  • the cylinder B has a check valve 1 in the neighborhood of an end thereof, a discharge conduit 2 having a flange 2', a liquid inlet conduit 3 having a flange 3' in the neighborhood of the other end thereof, and an adjusting screw 4 threaded into one end thereof.
  • a tubular plunger 7 having an outlet port 5 provided with a check valve 5' at an end thereof and an inlet port 6 in the neighborhood of the other end thereof.
  • Said inlet port 6 of the plunger 7 opens within a lantern ring 8 having a through hole 8' communicating with the liquid inlet means 3 of said cylinder B.
  • Said lantern ring 8 is held between two groups of gland packings 9 and 10.
  • the gland packing group 9 has its surface on the side opposed to the lantern ring urged against the inside base surface of the cylinder B.
  • a gland packing gland 11 is urged against the surface of the gland packing group 10 on the side opposed to the lantern ring.
  • the gland packing gland 11 has a ringshaped portion 11a at an end and a disk portion 11b at the other end.
  • the ring-shaped portion 11a and the disk portion 11b are connected integrally by means of a plurality of legs lie.
  • the ring-shaped portion 11a is urged against said gland packing group 10, and the disk portion 11b abuts adjusting screw 4 provided for adjusting the tightness of the gland packing by adjusting screw 4.
  • the plunger driving means casing C comprises a crankshaft 12, a crank 13, a slide bar 14, a crosshead 15, and a diaphragm 16.
  • a cylindrical crank 13 is eccentrically fixed to the crank shaft 12 an end of which is extends outside the driving means casing C.
  • the slide bar 14 is at an end pivotally fitted to said crank 13 and at the other end pivotally supported at the base of the crosshead 15 through a pin 17.
  • a diaphragm 16 At the tip of the crosshead 15 is mounted a diaphragm 16 the pheripheral of which is held and fixed between the cylinder B and housing C.
  • a bolt 15' the tip of which is threadably fixed to the base of said plunger 7 while a conduit 19 extends from a diaphragm chamber 18 formed by the diaphragm 16 and the top inner surface of the driving means, the tip of said conduit being connected to the inlet means 3 of the cylin der B.
  • Numeral 20 designates an O-ring surrounding screw 4.
  • Numerals 21 and 22 designate valve locking means respectively provided by projections at the upper dead points of the check valve 1 and the plunger valve 5'.
  • crank-shaft 12 is connected at an end with a motor (not shown) for driving the crank-shaft 12 through suitable means such as, for example. a reduction mechanism.
  • the check valve l closes and the plunber valve 5' opens. Accordingly, the liquid in the liquid inlet 3 flows through the inlet port 6 of the plunger 7 and pushes the plunger valve 5' up to enter the pump chamber.
  • the volume of the liquid sucked into the pump chamber during said stroke is, likewise, roughly equal to the product of the distance over which the plunger 7 moved back from the gland packing group 10 and the sectional area of the plunger 7. In other words, the volume of liquid discharged from the discharge valve body 2 is equal to the product of the sectional area of the plunger 7 and the stroke dimension thereof.
  • the reciprocating pump according to the present invention conveys the liquid repeating suction and discharge strokes by the reciprocating movement of the hollow plunger.
  • the diaphragm l6 pulsates synchronously with the reciprocating movement of the plunger 7. Therefore, even when a portion of the liquid sucked into the lantern ring infiltrates into suction chamber 18 through a space between the gland packing group 9 and the inner wall of the cylinder B or the hollow plunger 7, the liquid is returned to liquid inlet means 3 by the conduit 19. And, even when the liquid at the discharge side leaks by the discharge pressure through the space between the gland packing group 10 and the inner wall of the cylinder B or the hollow plunger 7, the leaked liquid is automatically returned to the liquid inlet means 3. Therefore, the pump according to the present invention is completely free from the possibility that the liquid leaks out of the pump.
  • the reciprocating pump according to the present invention has the following effects which cannot be achieved by any of the known reciprocating pumps of this type:
  • the known plunger type and diaphragm type reciprocating pumps have the possibility that, when the amount of suction is less than lOO percent, it cannot secure sufficient uniformity in pumping volume.
  • the known diaphragm type reciprocating pump has a serious disadvantage in that the diaphragm is deformed by the discharge pressure to considerably interrupt the uniformity in pumping volume.
  • a volume of liquid equal to the sectional area of the plunger '7 and the suction and discharge strokes is constantly discharged regardless of the distance of said strokes, thus securing a uniform pumping rate.
  • the known diaphragm type reciprocating pump is not suitable for discharging at high pressure, for example 300 500 atmospheres, since there is naturally a limit to the thickness of the diaphragm and the discharge pressure is exerted directly onto the diaphragm.
  • high pressure for example 300 500 atmospheres
  • the inside of the suction chamber 18 and the suction side is always maintained at a pressure below 1 Kg/cm since the high pressure on the discharge side is checked by the plunger valve 5', thereby achieving a smooth reciprocating motion without the possibility of damage to diaphragm 16 by the high pressure.
  • the known plunger type reciprocating pump has a disadvantage in that the leakage through the gland packing increases as the pressure increases.
  • the pump according to the present invention as described above, even when leakage occurs, the leaked liquid is returned to the suction side under normal pressure. Accordingly, the pump according to the present invention can be safely used for liquid requiring a high discharge pressure.
  • a partition means dividing the cylindrical easing into a suction chamber adjacent the other end and a discharge chamber adjacent the one end.
  • the partition means including a lantern ring having a bore communicating with the inlet conduit and gland packings adjacent the lantern ring and providing a seal between the lantern ring and the suction and discharge chambers, respectively,
  • a tubular plunger defining an axial bore reciprocably received in the cylindrical casing in an axial passage of the lantern ring, the tubular plunger having two ends and one of the plunger ends being connected to the flexible sealing member,
  • an inlet port being arranged in the plunger adjacent the one end thereof and communicating with the axial bore
  • a drive means mounted in the housing and connected to the one end of the tubular plunger for re ciprocating the plunger in the cylindrical casing between positions wherein the inlet port is in and out of register with the inlet conduit, and
  • the tightening means comprising a gland packing gland having two ends and a plurality of legs interconnecting the two gland packing gland ends, and an adjusting screw threadedly mounted in the one cylindrical casing end being operable from the outside of the casing, the adjusting screw bearing against one of the ends of the gland packing gland and urging the other end thereof against the gland packing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Revetment (AREA)
US351825A 1972-03-27 1973-04-17 Reciprocating pump Expired - Lifetime US3887305A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47031072A JPS4898632A (enrdf_load_stackoverflow) 1972-03-27 1972-03-27

Publications (1)

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US3887305A true US3887305A (en) 1975-06-03

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US351825A Expired - Lifetime US3887305A (en) 1972-03-27 1973-04-17 Reciprocating pump

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JP (1) JPS4898632A (enrdf_load_stackoverflow)

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4541779A (en) * 1981-10-08 1985-09-17 Birdwell J C Mud pump
US4681516A (en) * 1985-05-20 1987-07-21 Graco Inc. Leakage preventing liquid supply pump
US4768714A (en) * 1984-05-31 1988-09-06 Luchsinger Pedro W Portable sprayer with leak control and agitator
US4784588A (en) * 1984-03-14 1988-11-15 Kioritz Corporation Plunger pump
US4798333A (en) * 1984-05-31 1989-01-17 Luchsinger Pedro W Portable sprayer with improved combination of piston and diaphragm pump
US5017105A (en) * 1989-08-28 1991-05-21 Grunbeck Waseraufbereitung Gmbh Metering pump
US5184943A (en) * 1991-03-08 1993-02-09 Frank And Robyn Walton 1990 Family Trust Rolling diaphragm injection pump
US5569021A (en) * 1995-01-17 1996-10-29 The United States Of America As Represented By The Department Of Energy Hydraulic pump with in-ground filtration and monitoring capability
US20050220643A1 (en) * 2002-01-21 2005-10-06 Kensuke Honma Rotary type fluid machine
US20060045782A1 (en) * 2004-08-27 2006-03-02 Lincoln Industrial Corporation Low-friction reciprocating pump
WO2007118568A1 (de) * 2006-04-13 2007-10-25 Lincoln Gmbh Förderpumpe und dichtungsanordnung hierfür
CN105090010A (zh) * 2014-05-17 2015-11-25 上海尼可尼流体系统有限公司 静密封柱塞泵
US20160208796A1 (en) * 2013-10-14 2016-07-21 Continental Automotive Gmbh High Pressure Pump
US10947967B1 (en) 2020-03-11 2021-03-16 Halliburton Energy Services, Inc. Discharge valve disabler and pressure pulse generator therefrom
US10989188B2 (en) 2019-07-26 2021-04-27 Halliburton Energy Services, Inc. Oil field pumps with reduced maintenance
US11002120B1 (en) * 2020-02-28 2021-05-11 Halliburton Energy Services, Inc. Dynamic packing seal compression system for pumps
US11073144B1 (en) 2020-02-14 2021-07-27 Halliburton Energy Services, Inc. Pump valve assembly
US11105327B2 (en) 2019-05-14 2021-08-31 Halliburton Energy Services, Inc. Valve assembly for a fluid end with limited access
US11231111B2 (en) 2019-05-14 2022-01-25 Halliburton Energy Services, Inc. Pump valve seat with supplemental retention
US11261863B2 (en) 2019-05-14 2022-03-01 Halliburton Energy Services, Inc. Flexible manifold for reciprocating pump
US11280326B2 (en) 2019-06-10 2022-03-22 Halliburton Energy Services, Inc. Pump fluid end with suction valve closure assist
US11441687B2 (en) 2019-05-14 2022-09-13 Halliburton Energy Services, Inc. Pump fluid end with positional indifference for maintenance
US11530750B2 (en) 2019-12-24 2022-12-20 Halliburton Energy Services, Inc. Horizontal balanced guided valve
US11560884B2 (en) 2019-11-18 2023-01-24 Kerr Machine Co. Fluid end
US11560888B2 (en) 2019-05-14 2023-01-24 Halliburton Energy Services, Inc. Easy change pump plunger
US11578710B2 (en) * 2019-05-02 2023-02-14 Kerr Machine Co. Fracturing pump with in-line fluid end
US11578711B2 (en) 2019-11-18 2023-02-14 Kerr Machine Co. Fluid routing plug
US11635068B2 (en) 2019-11-18 2023-04-25 Kerr Machine Co. Modular power end
US11644018B2 (en) 2019-11-18 2023-05-09 Kerr Machine Co. Fluid end
US11686296B2 (en) 2019-11-18 2023-06-27 Kerr Machine Co. Fluid routing plug
US11739748B2 (en) 2019-05-14 2023-08-29 Halliburton Energy Services, Inc. Pump fluid end with easy access suction valve
US11808364B2 (en) 2021-11-11 2023-11-07 Kerr Machine Co. Valve body
US11808254B2 (en) 2019-11-18 2023-11-07 Kerr Machine Co. Fluid end assembly
US11920583B2 (en) 2021-03-05 2024-03-05 Kerr Machine Co. Fluid end with clamped retention
US11946465B2 (en) 2021-08-14 2024-04-02 Kerr Machine Co. Packing seal assembly
US11965504B2 (en) 2022-02-11 2024-04-23 Kerr Machine Co. Manifold assembly
US11965503B2 (en) 2019-05-14 2024-04-23 Halliburton Energy Services, Inc. Flexible manifold for reciprocating pump
US12018662B2 (en) 2019-11-18 2024-06-25 Kerr Machine Co. High pressure pump
US12258950B2 (en) 2023-01-12 2025-03-25 Gd Energy Products, Llc Open channel plunger for fracking pumps
US12292040B2 (en) 2019-11-18 2025-05-06 Kerr Machine Co. High pressure pump
US12297827B2 (en) 2023-06-05 2025-05-13 Kerr Machine Co. Fluid end with clamped retention
US12338813B2 (en) 2023-10-03 2025-06-24 Kerr Machine Co. Liquid cooled plunger system
US12404942B2 (en) 2020-02-14 2025-09-02 Halliburton Energy Services, Inc. Plunger or piston with hardened insert

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1584843A (en) * 1924-01-07 1926-05-18 Sun Shipbuilding & Dry Dock Co Slush-pump structure
US1787700A (en) * 1928-08-01 1931-01-06 Laurence M Persons Packing for pumps
US2281933A (en) * 1936-05-27 1942-05-05 Henry T Gage Differential pump
US2678609A (en) * 1948-03-06 1954-05-18 Emsco Mfg Company Lubricating and sealing means
US2696785A (en) * 1949-03-11 1954-12-14 Blue Co John Metering pump for liquid anhydrous ammonia or other liquids
US2771846A (en) * 1954-05-17 1956-11-27 John Blue Company Inc Variable-capacity metering pump
US2898867A (en) * 1954-11-29 1959-08-11 Milton Roy Co Pump with sealing arrangement
US2957422A (en) * 1956-01-09 1960-10-25 Dempster Mill Mfg Co Pumps

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1584843A (en) * 1924-01-07 1926-05-18 Sun Shipbuilding & Dry Dock Co Slush-pump structure
US1787700A (en) * 1928-08-01 1931-01-06 Laurence M Persons Packing for pumps
US2281933A (en) * 1936-05-27 1942-05-05 Henry T Gage Differential pump
US2678609A (en) * 1948-03-06 1954-05-18 Emsco Mfg Company Lubricating and sealing means
US2696785A (en) * 1949-03-11 1954-12-14 Blue Co John Metering pump for liquid anhydrous ammonia or other liquids
US2771846A (en) * 1954-05-17 1956-11-27 John Blue Company Inc Variable-capacity metering pump
US2898867A (en) * 1954-11-29 1959-08-11 Milton Roy Co Pump with sealing arrangement
US2957422A (en) * 1956-01-09 1960-10-25 Dempster Mill Mfg Co Pumps

Cited By (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4541779A (en) * 1981-10-08 1985-09-17 Birdwell J C Mud pump
US4784588A (en) * 1984-03-14 1988-11-15 Kioritz Corporation Plunger pump
US4768714A (en) * 1984-05-31 1988-09-06 Luchsinger Pedro W Portable sprayer with leak control and agitator
US4798333A (en) * 1984-05-31 1989-01-17 Luchsinger Pedro W Portable sprayer with improved combination of piston and diaphragm pump
US4681516A (en) * 1985-05-20 1987-07-21 Graco Inc. Leakage preventing liquid supply pump
US5017105A (en) * 1989-08-28 1991-05-21 Grunbeck Waseraufbereitung Gmbh Metering pump
US5184943A (en) * 1991-03-08 1993-02-09 Frank And Robyn Walton 1990 Family Trust Rolling diaphragm injection pump
US5569021A (en) * 1995-01-17 1996-10-29 The United States Of America As Represented By The Department Of Energy Hydraulic pump with in-ground filtration and monitoring capability
US20050220643A1 (en) * 2002-01-21 2005-10-06 Kensuke Honma Rotary type fluid machine
US20060045782A1 (en) * 2004-08-27 2006-03-02 Lincoln Industrial Corporation Low-friction reciprocating pump
WO2007118568A1 (de) * 2006-04-13 2007-10-25 Lincoln Gmbh Förderpumpe und dichtungsanordnung hierfür
US20110020157A1 (en) * 2006-04-13 2011-01-27 Lincoln Gmbh Feed pump and sealing arrangement for same
US20160208796A1 (en) * 2013-10-14 2016-07-21 Continental Automotive Gmbh High Pressure Pump
US10132311B2 (en) * 2013-10-14 2018-11-20 Continental Automotive Gmbh High pressure pump
CN105090010A (zh) * 2014-05-17 2015-11-25 上海尼可尼流体系统有限公司 静密封柱塞泵
US12221957B2 (en) 2019-05-02 2025-02-11 Kerr Machine Co. Fracturing pump arrangement using a plunger with an internal fluid passage
US11578710B2 (en) * 2019-05-02 2023-02-14 Kerr Machine Co. Fracturing pump with in-line fluid end
US11952986B2 (en) 2019-05-02 2024-04-09 Kerr Machine Co. Fracturing pump arrangement using a plunger with an internal fluid passage
US12276270B2 (en) 2019-05-02 2025-04-15 Kerr Machine Co. Fracturing pump arrangement using a plunger with an internal fluid passage
US11592011B2 (en) 2019-05-02 2023-02-28 Kerr Machine Co. Fracturing pump with in-line fluid end
US11952990B2 (en) 2019-05-02 2024-04-09 Kerr Machine Co. Fracturing pump arrangement using a plunger with an internal fluid passage
US11231111B2 (en) 2019-05-14 2022-01-25 Halliburton Energy Services, Inc. Pump valve seat with supplemental retention
US11441687B2 (en) 2019-05-14 2022-09-13 Halliburton Energy Services, Inc. Pump fluid end with positional indifference for maintenance
US11739748B2 (en) 2019-05-14 2023-08-29 Halliburton Energy Services, Inc. Pump fluid end with easy access suction valve
US11965503B2 (en) 2019-05-14 2024-04-23 Halliburton Energy Services, Inc. Flexible manifold for reciprocating pump
US11560888B2 (en) 2019-05-14 2023-01-24 Halliburton Energy Services, Inc. Easy change pump plunger
US11261863B2 (en) 2019-05-14 2022-03-01 Halliburton Energy Services, Inc. Flexible manifold for reciprocating pump
US11105327B2 (en) 2019-05-14 2021-08-31 Halliburton Energy Services, Inc. Valve assembly for a fluid end with limited access
US12247563B2 (en) 2019-05-14 2025-03-11 Halliburton Energy Services, Inc. Flexible manifold for reciprocating pump
US11280326B2 (en) 2019-06-10 2022-03-22 Halliburton Energy Services, Inc. Pump fluid end with suction valve closure assist
US12228127B2 (en) 2019-06-10 2025-02-18 Halliburton Energy Services, Inc. Pump fluid end with suction valve closure assist
US11885316B2 (en) 2019-06-10 2024-01-30 Halliburton Energy Services, Inc. Pump fluid end with suction valve closure assist
US10989188B2 (en) 2019-07-26 2021-04-27 Halliburton Energy Services, Inc. Oil field pumps with reduced maintenance
US11635068B2 (en) 2019-11-18 2023-04-25 Kerr Machine Co. Modular power end
US11635151B2 (en) 2019-11-18 2023-04-25 Kerr Machine Co Modular power end
US12221958B2 (en) 2019-11-18 2025-02-11 Kerr Machine Co. Modular power end
US11808254B2 (en) 2019-11-18 2023-11-07 Kerr Machine Co. Fluid end assembly
US11846282B2 (en) 2019-11-18 2023-12-19 Kerr Machine Co. High pressure pump
US11859611B2 (en) 2019-11-18 2024-01-02 Kerr Machine Co. Fluid routing plug
US11644018B2 (en) 2019-11-18 2023-05-09 Kerr Machine Co. Fluid end
US12292040B2 (en) 2019-11-18 2025-05-06 Kerr Machine Co. High pressure pump
US12281645B2 (en) 2019-11-18 2025-04-22 Kerr Machine Co. Modular power end
US12264661B2 (en) 2019-11-18 2025-04-01 Kerr Machine Co. High pressure pump
US11578711B2 (en) 2019-11-18 2023-02-14 Kerr Machine Co. Fluid routing plug
US11686296B2 (en) 2019-11-18 2023-06-27 Kerr Machine Co. Fluid routing plug
US11560884B2 (en) 2019-11-18 2023-01-24 Kerr Machine Co. Fluid end
US12018662B2 (en) 2019-11-18 2024-06-25 Kerr Machine Co. High pressure pump
US12188458B2 (en) 2019-11-18 2025-01-07 Kerr Machine Co. Fluid end assembly
US11530750B2 (en) 2019-12-24 2022-12-20 Halliburton Energy Services, Inc. Horizontal balanced guided valve
US12404942B2 (en) 2020-02-14 2025-09-02 Halliburton Energy Services, Inc. Plunger or piston with hardened insert
US11073144B1 (en) 2020-02-14 2021-07-27 Halliburton Energy Services, Inc. Pump valve assembly
US11002120B1 (en) * 2020-02-28 2021-05-11 Halliburton Energy Services, Inc. Dynamic packing seal compression system for pumps
US10947967B1 (en) 2020-03-11 2021-03-16 Halliburton Energy Services, Inc. Discharge valve disabler and pressure pulse generator therefrom
US11920583B2 (en) 2021-03-05 2024-03-05 Kerr Machine Co. Fluid end with clamped retention
US11946465B2 (en) 2021-08-14 2024-04-02 Kerr Machine Co. Packing seal assembly
US12305628B2 (en) 2021-08-14 2025-05-20 Kerr Machine Co. Packing seal assembly
US11808364B2 (en) 2021-11-11 2023-11-07 Kerr Machine Co. Valve body
US12264671B2 (en) 2022-02-11 2025-04-01 Kerr Machine Co. Manifold assembly
US11965504B2 (en) 2022-02-11 2024-04-23 Kerr Machine Co. Manifold assembly
US12258950B2 (en) 2023-01-12 2025-03-25 Gd Energy Products, Llc Open channel plunger for fracking pumps
US12297827B2 (en) 2023-06-05 2025-05-13 Kerr Machine Co. Fluid end with clamped retention
US12338813B2 (en) 2023-10-03 2025-06-24 Kerr Machine Co. Liquid cooled plunger system

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