US20130232789A1 - Threaded rod plunger installation tool - Google Patents

Threaded rod plunger installation tool Download PDF

Info

Publication number
US20130232789A1
US20130232789A1 US13/863,070 US201313863070A US2013232789A1 US 20130232789 A1 US20130232789 A1 US 20130232789A1 US 201313863070 A US201313863070 A US 201313863070A US 2013232789 A1 US2013232789 A1 US 2013232789A1
Authority
US
United States
Prior art keywords
plunger
pump
nut
threaded rod
cylinder opening
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.)
Abandoned
Application number
US13/863,070
Inventor
Pankaj Patel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weir SPM Inc
SPM Oil and Gas Inc
Original Assignee
SPM Flow Control Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SPM Flow Control Inc filed Critical SPM Flow Control Inc
Priority to US13/863,070 priority Critical patent/US20130232789A1/en
Assigned to WEIR SPM, INC. reassignment WEIR SPM, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PATEL, PANKAJ
Publication of US20130232789A1 publication Critical patent/US20130232789A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00Pumping installations or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22Arrangements for enabling ready assembly or disassembly
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49229Prime mover or fluid pump making
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49229Prime mover or fluid pump making
    • Y10T29/49231I.C. [internal combustion] engine making
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49229Prime mover or fluid pump making
    • Y10T29/49236Fluid pump or compressor making
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/53Means to assemble or disassemble
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/53Means to assemble or disassemble
    • Y10T29/53796Puller or pusher means, contained force multiplying operator
    • Y10T29/53848Puller or pusher means, contained force multiplying operator having screw operator
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/53Means to assemble or disassemble
    • Y10T29/53796Puller or pusher means, contained force multiplying operator
    • Y10T29/53848Puller or pusher means, contained force multiplying operator having screw operator
    • Y10T29/53857Central screw, work-engagers around screw
    • Y10T29/53891Plate or bar forms work-engager
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/53Means to assemble or disassemble
    • Y10T29/53909Means comprising hand manipulatable tool
    • Y10T29/53943Hand gripper for direct push or pull
    • Y10T29/53952Tube sleeve or ferrule applying or removing

Definitions

  • This invention relates in general to plungers used in reciprocating pumps, and, in particular, to a threaded rod tool for installing a plunger.
  • a reciprocating pump can be used to pump fluid such as chemicals, cement, or other media into a well.
  • Reciprocating pumps typically increase the pressure within a cylinder by reciprocating a plunger longitudinally within the cylinder. Packing is generally used around the plunger and the plunger reciprocates as a crankshaft located within the pump rotates. As the plunger moves away from the cylinder, the pressure of the fluid inside chamber decreases creating a differential pressure across an inlet valve that allows the fluid to enter the cylinder. As plunger moves longitudinally towards the cylinder, the pressure of the fluid inside of the cylinder increases until the differential pressure across an outlet valve opens the outlet valve and allows fluid to exit cylinder.
  • Maintenance of the pump typically includes repacking of the packing surrounding the plunger and revalving of the inlet and outlet valves mentioned above.
  • the pump is disassembled by removing a suction cover plate and removing the plunger, which can be quite heavy. Additional pump components, such as connecting rods and pony rods may need to be stroked out to push out the plunger.
  • the plunger must be reinstalled. The plunger is heavy and requires much effort to push it back into the cylinder through the packing elements. Frequently, installing the plunger requires maintenance personnel to hammer the plunger into place during installation, potentially damaging pump parts or injuring personnel.
  • a threaded rod plunger installation tool is connected to a pump after maintenance is complete.
  • the tool includes a threaded ring that threads into a cylinder opening.
  • the cylinder opening is covered by a suction cover plate during operation and has threads on an interior surface.
  • the threaded ring provides a reaction point during the installation of the plunger.
  • the tool further comprises a nut with a handle and a pair of channels that slide over a lip formed on the exterior side of the threaded ring. The nut in this embodiment is separate from the rest of the tool.
  • the plunger installation tool further comprises a threaded rod that engages a threaded opening on the nut.
  • the rod has an end that can engage the plunger and also has a bolt head on the other end that can be engaged by a driver such as a wrench.
  • the plunger is placed at the cylinder opening and the threaded rod plunger installation tool is mounted onto the pump.
  • a driver such as a wrench or a motorized drill can engage the bolt head and rotate it and thereby advance the threaded rod into the cylinder opening.
  • the nut prevents the threaded rod from backing out as it pushes the plunger into the cylinder bore.
  • the installation tool advantageously generates sufficient force, in one example at least 2000 psi, to push the plunger into place.
  • the threaded rod plunger installation tool thus advantageously provides a safer way to maintain and disassemble pumps because the plunger installation tool, rather than a hammer, can be used to push the plunger back into position within the pump cylinder. This also results in a less time consuming, potentially less damaged parts, and a less labor intensive method of maintaining and disassembling the pumps as hammering of the heavy plunger is eliminated.
  • FIG. 1 is a schematic side view of a prior art reciprocating pump
  • FIG. 2 is a sectional view of the pump of FIG. 1 ;
  • FIG. 3 is an enlarged perspective view of the interior side of one embodiment of a threaded rod installation tool used to install the plunger back into the cylinder opening, constructed in accordance with the invention
  • FIG. 4 is an enlarged perspective view of the exterior side of one embodiment of a threaded rod installation tool used to install the plunger back into the cylinder opening, constructed in accordance with the invention
  • FIG. 5 is a sectional view of one embodiment of a threaded rod installation tool pushing the plunger back into the cylinder opening, constructed in accordance with the invention.
  • reciprocating pump assembly or pump 12 includes a crankshaft housing 13 that comprises a majority of the outer surface of reciprocating pump 12 .
  • Stay rods 15 connect crankshaft housing 13 to a cylinder housing 17 having a set of cylinders 37 ( FIG. 2 ).
  • Each cylinder 37 is in communication with a fluid inlet 19 and a fluid outlet 21 .
  • a suction cover plate 22 connects to an end of each cylinder 17 opposite the housing that houses the stay rods 15 .
  • Pump 12 can be free-standing on the ground, can be mounted to a trailer that can be towed between operational sites, or mounted to a skid such as for offshore operations.
  • crankshaft housing 13 houses a crankshaft 25 , which is typically mechanically connected to a motor (not shown). The motor rotates crankshaft 25 in order to drive reciprocating pump 12 ( FIG. 1 ).
  • crankshaft 25 is cammed so that fluid is pumped from each cylinder 37 at alternating times. As is readily appreciable by those skilled in the art, alternating the cycles of pumping fluid from each of cylinders 37 helps minimize the primary, secondary, and tertiary (et al.) forces associated with reciprocating pump 12 ( FIG. 1 ).
  • a gear 24 is mechanically connected to crankshaft 25 , that is rotated by the motor through gears 26 and 24 .
  • a connector rod 27 is connected to the crankshaft 25 at one end.
  • the connector rod 27 connects to a crosshead 29 through a crosshead wrist pin 31 , which holds connector rod 27 longitudinally relative to crosshead 29 .
  • the connector rod 27 pivots within a crosshead bushing 34 as crankshaft 25 rotates with the other end of connector rod 27 .
  • a pony rod 33 extends from crosshead 29 in a longitudinally opposite direction from crankshaft 25 .
  • Connector rod 27 and crosshead 29 convert rotational movement of crankshaft 25 into longitudinal movement of pony rod 33 .
  • a plunger 35 is connected to pony rod 33 for pumping the fluid passing through cylinder 37 .
  • Packing 36 surrounds plunger 35 .
  • a packing nut 38 is threaded into the cylinder housing 17 , and acts to maintain the packing 36 in the proper position within cylinder 37 .
  • Cylinder 37 includes an interior or cylinder chamber 39 , which is where plunger 35 compresses the fluid being pumped by reciprocating pump 12 ( FIG. 1 ).
  • Cylinder 37 also typically includes an inlet valve 41 and an outlet valve 43 . Valves 41 and 43 are usually spring-loaded valves and are actuated by a predetermined differential pressure. Inlet valve 41 actuates to control fluid flow through fluid inlet 19 into cylinder chamber 39 , and outlet valve 43 actuates to control fluid flow through fluid outlet 21 from cylinder chamber 39 .
  • Plunger 35 reciprocates, or moves longitudinally toward and away from cylinder chamber 39 , as crankshaft 25 rotates.
  • the pressure of the fluid inside chamber 39 decreases creating a differential pressure across inlet valve 41 , which actuates valve 41 and allows the fluid to enter cylinder chamber 39 from fluid inlet 19 .
  • the fluid being pumped enters cylinder chamber 39 as plunger 35 continues to move longitudinally away from cylinder chamber 39 until the pressure difference between the fluid inside chamber 39 and the fluid in fluid inlet 19 is small enough for inlet valve 41 to actuate to its closed position.
  • the pressure on the fluid inside of cylinder chamber 39 begins to increase.
  • Fluid pressure inside cylinder chamber 39 continues to increase as plunger 35 approaches cylinder chamber 39 until the differential pressure across outlet valve 43 is large enough to actuate valve 43 and allow the fluid to exit cylinder 37 through fluid outlet 21 .
  • fluid is only pumped across one side of plunger 35 , therefore reciprocating pump 12 is a single-acting reciprocating pump.
  • Maintenance of the pump 12 typically includes repacking of the packing 36 surrounding the plunger 35 and revalving of the inlet and outlet valves 41 , 43 .
  • the pump 12 is disassembled by removing the suction cover plate 22 and removing the plunger 35 .
  • the connector rod 27 and pony rod 33 can be stroked out to slide the plunger 35 out and provide access to the packing 36 and valves 41 , 43 .
  • installing the plunger 35 requires maintenance personnel to hammer the plunger 35 into place during installation. This approach to reinstall the plunger 35 can damage pump 12 parts and injure personnel.
  • the threaded rod plunger installation tool 50 can be placed proximate to the pump 12 after maintenance is complete.
  • the tool 50 comprises a threaded ring 52 shown threaded on an outer circumference that screws into a threaded pump cylinder opening 53 ( FIG. 5 ).
  • the tool 50 thus provides a reaction point during installation of the plunger 35 .
  • the tool 50 further includes a planar shaped nut 54 with an attached curved handle 56 .
  • the nut 54 lies in a plane that is substantially perpendicular to an axis of the ring 52 .
  • a pair of side channels 58 is formed in an end of the nut 54 opposite where the handle 56 is mounted.
  • the nut 54 can be held by the handle 56 and slid over a lip 60 ( FIG. 5 ) formed on the exterior side of the threaded ring 52 .
  • the channels 58 on the nut 54 slidingly receives the lip 60 on the threaded ring 52 .
  • the nut 54 can be solid or can have a plurality of holes 55 to reduce the weight of the nut 54 .
  • Further comprising the plunger installation tool 50 is a threaded rod 62 that engages a threaded opening 64 on the nut 54 .
  • the threaded rod 62 has a plunger engagement end 66 and a bolt head 68 on the other end for engagement with a driver such as a wrench.
  • the plunger 35 is placed at the cylinder opening 53 and the threaded rod plunger installation tool 50 is mounted onto the threaded cylinder opening 53 with the threaded ring 52 portion.
  • a driver such as a wrench or a motorized drill can engage the bolt head 68 to rotate it and thereby advance the threaded rod 62 into the cylinder opening 53 .
  • the nut 54 prevents the threaded rod 62 from backing out.
  • the installation tool 50 can generate sufficient distributed force, preferably at least 2000 psi, through the driver and reaction points created by the threaded ring 52 and nut 54 , to push the plunger 35 into place. After the plunger 35 is properly in place within the pump cylinder 17 , the threaded rod 62 can be backed out of the nut 54 by the driver. The plunger installation tool 50 can then be removed for storage and the suction cover plate 22 placed back on the cylinder opening 53 .
  • the threaded rod plunger installation tool 50 has a hole at one end through which a rod can pass through and act as the driver rather than a wrench.
  • Reciprocating pumps 12 are large, and complex pieces of equipment with many parts that may have to be replaced as they wear out. Making the disassembly safer, simpler, and less time consuming is thus desirable because it makes pump maintenance safer and less labor intensive.
  • a threaded rod plunger installation tool 50 that can install the plunger 35 back into the pump 12 via a mechanical wrench or power drill, the need for manually hammering the plunger 35 into place is eliminated.
  • the dangerous and labor intensive task of installing the plunger 35 back into the pump 12 after completion of maintenance is eliminated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

A plunger installation tool that exerts a force on a plunger for a reciprocating pump to install the plunger into a pump cylinder opening. Maintenance of the pump typically includes repacking of the packing that surrounds the plunger and revalving of the pump's inlet and outlet valve. To allow repacking or revalving, the pump is disassembled and the plunger is removed. The plunger installation tool threads onto the pump cylinder opening to provide a reaction point for a threaded rod that is driven at one end by a driver and engages the plunger at an opposite end during installation to push the plunger into the cylinder opening without the use of hammers by personnel.

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • This application claims priority to provisional application 61/225,142, filed Jul. 13, 2009.
  • FIELD OF THE INVENTION
  • This invention relates in general to plungers used in reciprocating pumps, and, in particular, to a threaded rod tool for installing a plunger.
  • BACKGROUND OF THE INVENTION
  • Various kinds of pumps can be used in oilfield operations. One type of pump, for example, is a reciprocating pump. The reciprocating pump can be used to pump fluid such as chemicals, cement, or other media into a well. Reciprocating pumps typically increase the pressure within a cylinder by reciprocating a plunger longitudinally within the cylinder. Packing is generally used around the plunger and the plunger reciprocates as a crankshaft located within the pump rotates. As the plunger moves away from the cylinder, the pressure of the fluid inside chamber decreases creating a differential pressure across an inlet valve that allows the fluid to enter the cylinder. As plunger moves longitudinally towards the cylinder, the pressure of the fluid inside of the cylinder increases until the differential pressure across an outlet valve opens the outlet valve and allows fluid to exit cylinder.
  • Maintenance of the pump, typically includes repacking of the packing surrounding the plunger and revalving of the inlet and outlet valves mentioned above. To allow repacking or revalving, the pump is disassembled by removing a suction cover plate and removing the plunger, which can be quite heavy. Additional pump components, such as connecting rods and pony rods may need to be stroked out to push out the plunger. However, during assembly of the pump, the plunger must be reinstalled. The plunger is heavy and requires much effort to push it back into the cylinder through the packing elements. Frequently, installing the plunger requires maintenance personnel to hammer the plunger into place during installation, potentially damaging pump parts or injuring personnel.
  • Thus, installation of the plunger into the cylinder is time consuming, labor intensive, and potentially unsafe to personnel.
  • Thus, a technique would be desired that makes pump maintenance and plunger installation safer, less time consuming, and less labor intensive.
  • SUMMARY OF THE INVENTION
  • In an embodiment of the present invention, a threaded rod plunger installation tool is connected to a pump after maintenance is complete. The tool includes a threaded ring that threads into a cylinder opening. The cylinder opening is covered by a suction cover plate during operation and has threads on an interior surface. The threaded ring provides a reaction point during the installation of the plunger. The tool further comprises a nut with a handle and a pair of channels that slide over a lip formed on the exterior side of the threaded ring. The nut in this embodiment is separate from the rest of the tool.
  • In an embodiment of the present invention, the plunger installation tool further comprises a threaded rod that engages a threaded opening on the nut. The rod has an end that can engage the plunger and also has a bolt head on the other end that can be engaged by a driver such as a wrench.
  • During installation of the plunger the plunger is placed at the cylinder opening and the threaded rod plunger installation tool is mounted onto the pump. A driver such as a wrench or a motorized drill can engage the bolt head and rotate it and thereby advance the threaded rod into the cylinder opening. The nut prevents the threaded rod from backing out as it pushes the plunger into the cylinder bore. The installation tool advantageously generates sufficient force, in one example at least 2000 psi, to push the plunger into place. Once the plunger is properly in place within the pump cylinder, the threaded rod can be backed out of the nut by the driver and the plunger installation tool can then be removed for storage, allowing the suction cover plate to be placed back on the cylinder opening.
  • The threaded rod plunger installation tool thus advantageously provides a safer way to maintain and disassemble pumps because the plunger installation tool, rather than a hammer, can be used to push the plunger back into position within the pump cylinder. This also results in a less time consuming, potentially less damaged parts, and a less labor intensive method of maintaining and disassembling the pumps as hammering of the heavy plunger is eliminated.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic side view of a prior art reciprocating pump;
  • FIG. 2 is a sectional view of the pump of FIG. 1;
  • FIG. 3 is an enlarged perspective view of the interior side of one embodiment of a threaded rod installation tool used to install the plunger back into the cylinder opening, constructed in accordance with the invention;
  • FIG. 4 is an enlarged perspective view of the exterior side of one embodiment of a threaded rod installation tool used to install the plunger back into the cylinder opening, constructed in accordance with the invention;
  • FIG. 5 is a sectional view of one embodiment of a threaded rod installation tool pushing the plunger back into the cylinder opening, constructed in accordance with the invention.
  • DETAILED DESCRIPTION OF THE INVENTION
  • Referring to FIGS. 1 and 2, reciprocating pump assembly or pump 12 includes a crankshaft housing 13 that comprises a majority of the outer surface of reciprocating pump 12. Stay rods 15 connect crankshaft housing 13 to a cylinder housing 17 having a set of cylinders 37 (FIG. 2). Each cylinder 37 is in communication with a fluid inlet 19 and a fluid outlet 21. As shown in FIG. 2, a suction cover plate 22 connects to an end of each cylinder 17 opposite the housing that houses the stay rods 15. Pump 12 can be free-standing on the ground, can be mounted to a trailer that can be towed between operational sites, or mounted to a skid such as for offshore operations.
  • Referring to FIG. 2, a portion of reciprocating pump 12 housed within crankshaft housing 13 is shown. Crankshaft housing 13 houses a crankshaft 25, which is typically mechanically connected to a motor (not shown). The motor rotates crankshaft 25 in order to drive reciprocating pump 12 (FIG. 1). In one embodiment, crankshaft 25 is cammed so that fluid is pumped from each cylinder 37 at alternating times. As is readily appreciable by those skilled in the art, alternating the cycles of pumping fluid from each of cylinders 37 helps minimize the primary, secondary, and tertiary (et al.) forces associated with reciprocating pump 12 (FIG. 1).
  • A gear 24 is mechanically connected to crankshaft 25, that is rotated by the motor through gears 26 and 24. A connector rod 27 is connected to the crankshaft 25 at one end. The connector rod 27 connects to a crosshead 29 through a crosshead wrist pin 31, which holds connector rod 27 longitudinally relative to crosshead 29. The connector rod 27 pivots within a crosshead bushing 34 as crankshaft 25 rotates with the other end of connector rod 27. A pony rod 33 extends from crosshead 29 in a longitudinally opposite direction from crankshaft 25. Connector rod 27 and crosshead 29 convert rotational movement of crankshaft 25 into longitudinal movement of pony rod 33.
  • A plunger 35 is connected to pony rod 33 for pumping the fluid passing through cylinder 37. Packing 36 surrounds plunger 35. A packing nut 38 is threaded into the cylinder housing 17, and acts to maintain the packing 36 in the proper position within cylinder 37. Cylinder 37 includes an interior or cylinder chamber 39, which is where plunger 35 compresses the fluid being pumped by reciprocating pump 12 (FIG. 1). Cylinder 37 also typically includes an inlet valve 41 and an outlet valve 43. Valves 41 and 43 are usually spring-loaded valves and are actuated by a predetermined differential pressure. Inlet valve 41 actuates to control fluid flow through fluid inlet 19 into cylinder chamber 39, and outlet valve 43 actuates to control fluid flow through fluid outlet 21 from cylinder chamber 39.
  • Plunger 35 reciprocates, or moves longitudinally toward and away from cylinder chamber 39, as crankshaft 25 rotates. As plunger 35 moves longitudinally away from cylinder chamber 39, the pressure of the fluid inside chamber 39 decreases creating a differential pressure across inlet valve 41, which actuates valve 41 and allows the fluid to enter cylinder chamber 39 from fluid inlet 19. The fluid being pumped enters cylinder chamber 39 as plunger 35 continues to move longitudinally away from cylinder chamber 39 until the pressure difference between the fluid inside chamber 39 and the fluid in fluid inlet 19 is small enough for inlet valve 41 to actuate to its closed position. As plunger 35 begins to move longitudinally towards cylinder chamber 39, the pressure on the fluid inside of cylinder chamber 39 begins to increase. Fluid pressure inside cylinder chamber 39 continues to increase as plunger 35 approaches cylinder chamber 39 until the differential pressure across outlet valve 43 is large enough to actuate valve 43 and allow the fluid to exit cylinder 37 through fluid outlet 21. In one embodiment, fluid is only pumped across one side of plunger 35, therefore reciprocating pump 12 is a single-acting reciprocating pump.
  • Maintenance of the pump 12, typically includes repacking of the packing 36 surrounding the plunger 35 and revalving of the inlet and outlet valves 41, 43. To allow repacking or revalving, the pump 12 is disassembled by removing the suction cover plate 22 and removing the plunger 35. The connector rod 27 and pony rod 33 can be stroked out to slide the plunger 35 out and provide access to the packing 36 and valves 41, 43. Frequently, installing the plunger 35 requires maintenance personnel to hammer the plunger 35 into place during installation. This approach to reinstall the plunger 35 can damage pump 12 parts and injure personnel.
  • Referring to FIGS. 3-5, an embodiment of a threaded rod plunger installation tool 50 is shown. The threaded rod plunger installation tool 50 can be placed proximate to the pump 12 after maintenance is complete. The tool 50 comprises a threaded ring 52 shown threaded on an outer circumference that screws into a threaded pump cylinder opening 53 (FIG. 5). The tool 50 thus provides a reaction point during installation of the plunger 35. The tool 50 further includes a planar shaped nut 54 with an attached curved handle 56. The nut 54 lies in a plane that is substantially perpendicular to an axis of the ring 52. A pair of side channels 58 is formed in an end of the nut 54 opposite where the handle 56 is mounted. The nut 54 can be held by the handle 56 and slid over a lip 60 (FIG. 5) formed on the exterior side of the threaded ring 52. The channels 58 on the nut 54 slidingly receives the lip 60 on the threaded ring 52. The nut 54 can be solid or can have a plurality of holes 55 to reduce the weight of the nut 54. Further comprising the plunger installation tool 50 is a threaded rod 62 that engages a threaded opening 64 on the nut 54. The threaded rod 62 has a plunger engagement end 66 and a bolt head 68 on the other end for engagement with a driver such as a wrench.
  • During installation of the plunger 35, as shown in FIG. 5, the plunger 35 is placed at the cylinder opening 53 and the threaded rod plunger installation tool 50 is mounted onto the threaded cylinder opening 53 with the threaded ring 52 portion. A driver such as a wrench or a motorized drill can engage the bolt head 68 to rotate it and thereby advance the threaded rod 62 into the cylinder opening 53. The nut 54 prevents the threaded rod 62 from backing out. When the plunger engagement end 66 engages one end of the plunger 35, the continued advancement of the threaded rod 62 in response to its rotation by the driver will force the plunger 35 into the bore 37 of the pump cylinder 17. The installation tool 50 can generate sufficient distributed force, preferably at least 2000 psi, through the driver and reaction points created by the threaded ring 52 and nut 54, to push the plunger 35 into place. After the plunger 35 is properly in place within the pump cylinder 17, the threaded rod 62 can be backed out of the nut 54 by the driver. The plunger installation tool 50 can then be removed for storage and the suction cover plate 22 placed back on the cylinder opening 53.
  • In another embodiment (not shown), the threaded rod plunger installation tool 50 has a hole at one end through which a rod can pass through and act as the driver rather than a wrench.
  • Reciprocating pumps 12 are large, and complex pieces of equipment with many parts that may have to be replaced as they wear out. Making the disassembly safer, simpler, and less time consuming is thus desirable because it makes pump maintenance safer and less labor intensive. By using a threaded rod plunger installation tool 50 that can install the plunger 35 back into the pump 12 via a mechanical wrench or power drill, the need for manually hammering the plunger 35 into place is eliminated. Thus, the dangerous and labor intensive task of installing the plunger 35 back into the pump 12 after completion of maintenance, is eliminated.
  • This written description uses examples to disclose the invention, including the best mode, and also enable a person of ordinary skill in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. These embodiments are not intended to limit the scope of the invention. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims (4)

1.-17. (canceled)
18. A method for installing a plunger during maintenance or assembly of a pump, comprising:
placing a portion of the plunger in a cylinder opening on the pump;
providing a plunger installation tool comprising, a ring with a threaded outer circumference and a lip that projects radially outward from an end of the ring, a nut having a channel along an edge of the nut that extends into the nut from an outer surface of the nut, a threaded bore through the nut, and a threaded rod engaged in the threaded bore;
mating an end of the ring to the cylinder opening on the pump;
mating the nut onto the ring by inserting the lip into the channel;
advancing the threaded rod through the threaded bore in the nut until an engagement end of the rod engages an end of the plunger;
exerting a force on the plunger via a driver acting on the threaded rod to thereby push the plunger into a desired position within the cylinder opening; and
removing the threaded rod, nut, and mating end from the cylinder opening.
19. The method of claim 18, further comprising the step of repacking an area surrounding the plunger.
20. The method of claim 16, wherein the step of mating the ring to the cylinder opening comprises screwing a threaded end of the ring into the cylinder opening.
US13/863,070 2009-07-13 2013-04-15 Threaded rod plunger installation tool Abandoned US20130232789A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/863,070 US20130232789A1 (en) 2009-07-13 2013-04-15 Threaded rod plunger installation tool

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US22514209P 2009-07-13 2009-07-13
US12/835,496 US8418363B2 (en) 2009-07-13 2010-07-13 Threaded rod plunger installation tool
US13/863,070 US20130232789A1 (en) 2009-07-13 2013-04-15 Threaded rod plunger installation tool

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US12/835,496 Division US8418363B2 (en) 2009-07-13 2010-07-13 Threaded rod plunger installation tool

Publications (1)

Publication Number Publication Date
US20130232789A1 true US20130232789A1 (en) 2013-09-12

Family

ID=43450136

Family Applications (2)

Application Number Title Priority Date Filing Date
US12/835,496 Expired - Fee Related US8418363B2 (en) 2009-07-13 2010-07-13 Threaded rod plunger installation tool
US13/863,070 Abandoned US20130232789A1 (en) 2009-07-13 2013-04-15 Threaded rod plunger installation tool

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US12/835,496 Expired - Fee Related US8418363B2 (en) 2009-07-13 2010-07-13 Threaded rod plunger installation tool

Country Status (2)

Country Link
US (2) US8418363B2 (en)
WO (1) WO2011008763A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9249797B2 (en) 2010-12-16 2016-02-02 S.P.M. Flow Control, Inc. Plunger packing with wedge seal having extrusion recess
US20160153443A1 (en) * 2013-10-30 2016-06-02 Lime Instruments, Llc Sensor assembly for measuring dynamic pressure in reciprocating pumps
US10221848B2 (en) 2015-07-02 2019-03-05 S.P.M. Flow Control, Inc. Valve for reciprocating pump assembly
US11448210B2 (en) 2015-07-02 2022-09-20 Spm Oil & Gas Inc. Valve for reciprocating pump assembly

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD748228S1 (en) 2013-01-31 2016-01-26 S.P.M. Flow Control, Inc. Valve seat
WO2013116488A1 (en) 2012-02-03 2013-08-08 S.P.M. Flow Control, Inc. Pump assembly including fluid cylinder and tapered valve seats
US10750787B2 (en) 2018-01-03 2020-08-25 Cqens Technologies Inc. Heat-not-burn device and method
US11415127B2 (en) * 2018-04-27 2022-08-16 Ameriforge Group Inc. Well service pump system structural joint housing having a first connector and a second connector each including one or more lands and grooves that are configured to mate with corresponding lands and grooves in an end cylinder housing and a ram cylinder housing
CN109318175A (en) * 2018-12-10 2019-02-12 中国石油集团西部钻探工程有限公司 Cementing concrete plungers pump plunger dismantling device
WO2020198535A1 (en) * 2019-03-26 2020-10-01 S.P.M. Flow Control, Inc. Novel integrated plunger and packing assembly
US11578710B2 (en) 2019-05-02 2023-02-14 Kerr Machine Co. Fracturing pump with in-line fluid end
US11965503B2 (en) 2019-05-14 2024-04-23 Halliburton Energy Services, Inc. Flexible manifold for reciprocating pump
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
US10808846B1 (en) * 2019-05-14 2020-10-20 Halliburton Energy Services, Inc. Pump plunger with wrench features
US11739748B2 (en) 2019-05-14 2023-08-29 Halliburton Energy Services, Inc. Pump fluid end with easy access suction valve
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
US11560888B2 (en) 2019-05-14 2023-01-24 Halliburton Energy Services, Inc. Easy change pump plunger
US10808851B1 (en) 2019-06-10 2020-10-20 Halliburton Energy Services, Inc. Multi-material frac valve poppet
US10941766B2 (en) 2019-06-10 2021-03-09 Halliburton Energy Sendees, Inc. Multi-layer coating for plunger and/or packing sleeve
US11280326B2 (en) 2019-06-10 2022-03-22 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
US10677380B1 (en) 2019-07-26 2020-06-09 Halliburton Energy Services, Inc. Fail safe suction hose for significantly moving suction port
US11149728B2 (en) * 2019-08-12 2021-10-19 Halliburton Energy Services, Inc. Pump plunger protective packaging
CN113510655B (en) * 2021-06-24 2022-09-06 中国石油化工股份有限公司 Hydraulic end dismounting tool and method for plunger pump for oilfield water injection
WO2024035393A1 (en) * 2022-08-09 2024-02-15 Cqens Technologies Inc. Aerosol device and method for moving consumable

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037460A (en) * 1960-04-26 1962-06-05 Armco Steel Corp Pumps
US3666382A (en) * 1970-03-24 1972-05-30 Roseville Engineering Inc Pump
US3786551A (en) * 1972-04-10 1974-01-22 J Gregg Piston puller
US4009515A (en) * 1974-12-09 1977-03-01 Charles Racin Disc brake piston puller
US4589180A (en) * 1983-05-02 1986-05-20 Caterpillar Tractor Co. Tool for removal of an engine cylinder liner
US5003681A (en) * 1988-08-05 1991-04-02 Schley Paul E Brake tool
US5018261A (en) * 1990-04-10 1991-05-28 Markous Ezaria Y Piston pushing tool
US6195863B1 (en) * 2000-04-06 2001-03-06 Basil R. Blake Disc brake piston installation tool
US6574846B1 (en) * 2001-10-04 2003-06-10 Hsin Fa Kang Tool set for replacing brake pads of disc braking systems
US6755099B2 (en) * 2002-08-09 2004-06-29 Chun Po Huang Drive wrench structure
US20040255445A1 (en) * 2003-01-09 2004-12-23 Lisle Corporation Dual piston disc brake caliper compressor
US7194948B2 (en) * 2005-06-28 2007-03-27 Lai-Chen Liu Secondary pump of brake
US7389579B2 (en) * 2006-02-15 2008-06-24 Rode John E Apparatus for providing a load on a bearing, the bearing having an inner race mounted to a shaft and the bearing retained by a nut
US20100143163A1 (en) * 2008-12-10 2010-06-10 Weir Spm, Inc. Packing Nut Lock and Access Bore Cover Locking Assembly
US7748095B1 (en) * 2007-08-23 2010-07-06 Huguens Phane Brake piston system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07113426B2 (en) 1988-04-26 1995-12-06 儀信 小岩 Valve device
KR100383826B1 (en) 2001-03-22 2003-05-14 김도훈 Valve structure for the plunger pump
US7341435B2 (en) 2002-06-19 2008-03-11 Gardner Denver, Inc. Fluid end
US7506574B2 (en) * 2004-03-11 2009-03-24 Gardner Denver, Inc. Self-tightening cover for pump

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037460A (en) * 1960-04-26 1962-06-05 Armco Steel Corp Pumps
US3666382A (en) * 1970-03-24 1972-05-30 Roseville Engineering Inc Pump
US3786551A (en) * 1972-04-10 1974-01-22 J Gregg Piston puller
US4009515A (en) * 1974-12-09 1977-03-01 Charles Racin Disc brake piston puller
US4589180A (en) * 1983-05-02 1986-05-20 Caterpillar Tractor Co. Tool for removal of an engine cylinder liner
US5003681A (en) * 1988-08-05 1991-04-02 Schley Paul E Brake tool
US5018261A (en) * 1990-04-10 1991-05-28 Markous Ezaria Y Piston pushing tool
US6195863B1 (en) * 2000-04-06 2001-03-06 Basil R. Blake Disc brake piston installation tool
US6574846B1 (en) * 2001-10-04 2003-06-10 Hsin Fa Kang Tool set for replacing brake pads of disc braking systems
US6755099B2 (en) * 2002-08-09 2004-06-29 Chun Po Huang Drive wrench structure
US20040255445A1 (en) * 2003-01-09 2004-12-23 Lisle Corporation Dual piston disc brake caliper compressor
US7194948B2 (en) * 2005-06-28 2007-03-27 Lai-Chen Liu Secondary pump of brake
US7389579B2 (en) * 2006-02-15 2008-06-24 Rode John E Apparatus for providing a load on a bearing, the bearing having an inner race mounted to a shaft and the bearing retained by a nut
US7748095B1 (en) * 2007-08-23 2010-07-06 Huguens Phane Brake piston system
US20100143163A1 (en) * 2008-12-10 2010-06-10 Weir Spm, Inc. Packing Nut Lock and Access Bore Cover Locking Assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9249797B2 (en) 2010-12-16 2016-02-02 S.P.M. Flow Control, Inc. Plunger packing with wedge seal having extrusion recess
US20160153443A1 (en) * 2013-10-30 2016-06-02 Lime Instruments, Llc Sensor assembly for measuring dynamic pressure in reciprocating pumps
US10221848B2 (en) 2015-07-02 2019-03-05 S.P.M. Flow Control, Inc. Valve for reciprocating pump assembly
US11111915B2 (en) 2015-07-02 2021-09-07 SPM Oil & Gas PC LLC Valve for reciprocating pump assembly
US11448210B2 (en) 2015-07-02 2022-09-20 Spm Oil & Gas Inc. Valve for reciprocating pump assembly

Also Published As

Publication number Publication date
WO2011008763A2 (en) 2011-01-20
US20110162187A1 (en) 2011-07-07
US8418363B2 (en) 2013-04-16
WO2011008763A3 (en) 2011-03-31

Similar Documents

Publication Publication Date Title
US8418363B2 (en) Threaded rod plunger installation tool
US20110030213A1 (en) Hydraulic installation tool for pump plunger
US8550102B2 (en) Easily replaceable valve assembly for a high pressure pump
US11828282B2 (en) Suction cover assembly for reciprocating pumps
US11952986B2 (en) Fracturing pump arrangement using a plunger with an internal fluid passage
US11692545B2 (en) Suction cover assembly for reciprocating pumps
US20100325888A1 (en) Carrier for plunger during disassembly
US20110173814A1 (en) Valve Seat Installation and Retrieval Tool
US20080080992A1 (en) Fluid end for duplex pumps
US20190072088A1 (en) Suction cover assembly for reciprocating pumps
US10436193B1 (en) Cylinder liner retainer system with torque multiplier and method
DE102008060659A1 (en) Clamping device for cylinder liners and their use and rinsing pump with clamping device
US7287460B2 (en) Hydraulic retention system for reciprocating pump cylinder liner
US20100158727A1 (en) Suction Port Lock Nut With Stub Buttress Threads
CA2373766C (en) Hydraulic retention system for reciprocating pump cylinder liner
US11149728B2 (en) Pump plunger protective packaging
US11376718B2 (en) Packing screw removal tool
US9080563B2 (en) Pump rod connector apparatus and method
US11815088B1 (en) Tension applying assembly for fluid end
US20240209845A1 (en) Fracturing pump arrangement using a plunger with an internal fluid passage
DE202008016143U1 (en) Clamping device for cylinder liners and rinsing pump with clamping device

Legal Events

Date Code Title Description
AS Assignment

Owner name: WEIR SPM, INC., TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PATEL, PANKAJ;REEL/FRAME:030217/0323

Effective date: 20090709

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION