WO2011002902A2 - Support pour piston pendant le démontage - Google Patents

Support pour piston pendant le démontage Download PDF

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Publication number
WO2011002902A2
WO2011002902A2 PCT/US2010/040628 US2010040628W WO2011002902A2 WO 2011002902 A2 WO2011002902 A2 WO 2011002902A2 US 2010040628 W US2010040628 W US 2010040628W WO 2011002902 A2 WO2011002902 A2 WO 2011002902A2
Authority
WO
WIPO (PCT)
Prior art keywords
pump
carrier assembly
plunger
mating end
nest
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.)
Ceased
Application number
PCT/US2010/040628
Other languages
English (en)
Other versions
WO2011002902A3 (fr
Inventor
John E. Hawes
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
Original Assignee
Weir SPM 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 Weir SPM Inc filed Critical Weir SPM Inc
Publication of WO2011002902A2 publication Critical patent/WO2011002902A2/fr
Publication of WO2011002902A3 publication Critical patent/WO2011002902A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49238—Repairing, converting, servicing or salvaging
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53961—Means to assemble or disassemble with work-holder for assembly

Definitions

  • This invention relates in general to plungers used in reciprocating pumps, and, in particular, to a carrier that holds the plunger during maintenance.
  • Various lands 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 that 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. Additional pump components, such as connecting rods and pony rods may need to be stroked out to push out the plunger.
  • the plunger is heavy and requires at least one person to be in position to pull and support the weight of the plunger. Another person would repack and revalve the pump in the meantime. Thus, two people are required to perform maintenance on the pump.
  • a carrier assembly is connected to a reciprocating pump for supporting a plunger removed from the pump during maintenance or disassembly.
  • a semi-cylindrical mating end can engage a cylinder opening on the pump.
  • the cylinder opening previously covered by a suction cover plate, has threads on an interior surface.
  • the mating end screws into the cylinder opening, with a semi-cylindrical flange on the mating end being in contact with the exterior of the pump along a periphery of the cylinder opening.
  • an upward facing concave surface or nest for receiving and supporting the plunger is connected at one end to the flange of the mating end.
  • the nest is cantilevered and holds and supports the weight of the plunger during maintenance or disassembly of the pump. Further, the nest has approximately a length equal to that of the plunger it supports.
  • a hinge runs longitudinally down the middle of the carrier assembly to allow the assembly to fold or pivot about the hinge. Further, the nest may be adjustable to allow handling of varying sizes of plungers.
  • the carrier assembly may be a single piece or fabricated from multiple pieces.
  • the carrier assembly thus advantageously provides a safer way to maintain and disassemble pumps because the carrier assembly, and not a person, supports the weight of the plunger. This also results in a less time consuming, and less labor intensive method of maintaining and disassembling the pumps as only one person, as opposed to two, is needed to perform maintenance procedures such as repacldng and revalving of the pump.
  • Figure 1 is a schematic side view illustration of a prior art reciprocating pump
  • Figure 2 is a sectional view of the pump of FIG. 1;
  • Figure 3 is an enlarged perspective view of one embodiment of a carrier connected to a cylinder opening to receive and hold the plunger, constructed in accordance with the invention.
  • Figure 4 is an enlarged frontal view of one embodiment of the carrier connected to a cylinder opening to receive and hold the plunger, constructed in accordance with the invention.
  • reciprocating pump assembly or pump 12 includes a crankshaft housing 13 that houses the power portion of reciprocating pump 12.
  • Stay rods 15 connect crankshaft housing 13 to a fluid end 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 37 opposite the crankshaft housing 13.
  • 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 bull gear 24 is mechanically connected to crankshaft 25 and is rotated by a motor through pinion gear 26.
  • 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 the 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 is mounted in the inner diameter of cylinder 37 and 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 pressurizes the fluid being pumped by reciprocating pump 12 (FIG. 1).
  • Cylinder 17 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 17, 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 of the fluid inside of cylinder chamber 39 begins to increase.
  • Fluid pressure inside cylinder chamber 39 continues to increase as plunger 35 approaches cylinder 17 until the differential pressure across outlet valve 43 is large enough to actuate valve 43 and allow the fluid to exit cylinder 17 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 push the plunger 35 out the opening 53 (FIG. 3) previously closed by cover plate 22.
  • Repacking and revalving can thus require two people as the plunger 35 is heavy and someone needs to be in position to pull and support the weight of plunger 35..
  • the carrier assembly 50 includes a threaded semi-circular annular mating end 52 shown coaxially set within a correspondingly contoured opening 53.
  • a semi-circular nest 54 is shown in the embodiment of FIG. 3 that is coaxial with and projecting from a side of the mating end 52 outside of the opening 53.
  • the nest 54 is elongated and has an upper surface profiled so the plunger 35 can be set thereon during disassembly.
  • the mating end 52 has a partial set of threads 57 on its outer surface and a semi-cylindrical flanged portion 58 on an end outside of the opening 53.
  • the flanged portion 58 extends radially past the cylinder opening 53 and is in contact with an exterior of the cylinder housing 17 adjacent the cylinder opening 53.
  • Cylinder opening 53 has a threaded inner radius so the cover plate 22 can be set therein.
  • the partial set of threads 57 on end 52 mate with the threads (not shown) in opening 53.
  • a hinge 56 runs longitudinally along the carrier assembly 50 to allow the assembly 50 to fold longitudinally along the middle. Alternatively, a plurality of hinges can be utilized; optionally, the carrier assembly 50 can be a single piece.
  • the threads 57 on the mating end 52 may engage the threads in the cylinder opening 53 after the suction cover plate 22 is removed.
  • the nest 54 forms an upward facing, concave surface that can receive and hold the plunger 35 during disassembly.
  • Carrier assembly 50 is thus cantilever supported and may be at least as long as the plunger 35.
  • the plunger 35 can be placed back into the cylinder opening 53 and the carrier assembly 50 can be removed.
  • the suction cover plate 22 can then be placed back in the cylinder opening 53.
  • the cai ⁇ ier assembly 50 is fabricated from multiple pieces, with the mating end 52 being separate from the nest 54.
  • the mating end 52 is not threaded. Instead a hinge is located at the cylinder opening 53 to mate with a hinge on the mating end 52.
  • a plurality of vertical ribs or protrusions are formed on either side of the cylinder opening 53.
  • a plurality of slots formed on the mating end 52 can slidingly engage the ribs to support the carrier assembly 50.
  • the concave and upward facing surface of the nest 54 may be adjusted to receive plungers 35 of varying size.
  • 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 and less time consuming is thus desirable because it makes pump maintenance safer less labor intensive.
  • a carrier assembly 50 that can mate with the cylinder opening 53 and that can hold the plunger 35 during disassembly, the need for two people to remove the plunger 35 is eliminated. Thus, revalving and repacking can be performed by one person.

Landscapes

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

Abstract

L'invention concerne un support qui tient un piston de pompe à piston pendant l'entretien. L'entretien de la pompe comprend typiquement le changement de la garniture qui entoure le piston et le changement de la soupape d'entrée et de sortie de la pompe. Pour permettre le changement de garniture ou de soupape, la pompe est démontée et le piston est retiré. Le support s'adapte à la pompe afin de tenir et supporter le poids du piston pendant le démontage, en permettant à une personne d'effectuer le changement de la garniture ou de la soupape de la pompe.
PCT/US2010/040628 2009-06-30 2010-06-30 Support pour piston pendant le démontage Ceased WO2011002902A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US22194709P 2009-06-30 2009-06-30
US61/221,947 2009-06-30
US12/826,493 2010-06-29
US12/826,493 US20100325888A1 (en) 2009-06-30 2010-06-29 Carrier for plunger during disassembly

Publications (2)

Publication Number Publication Date
WO2011002902A2 true WO2011002902A2 (fr) 2011-01-06
WO2011002902A3 WO2011002902A3 (fr) 2011-03-31

Family

ID=43379160

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/040628 Ceased WO2011002902A2 (fr) 2009-06-30 2010-06-30 Support pour piston pendant le démontage

Country Status (2)

Country Link
US (1) US20100325888A1 (fr)
WO (1) WO2011002902A2 (fr)

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
US10221848B2 (en) 2015-07-02 2019-03-05 S.P.M. Flow Control, Inc. Valve for reciprocating pump assembly
US10240597B2 (en) 2012-02-03 2019-03-26 S.P.M. Flow Control, Inc. Pump assembly including fluid cylinder and tapered valve seats
USD856498S1 (en) 2013-01-31 2019-08-13 S.P.M. Flow Control, Inc. Valve seat
US11448210B2 (en) 2015-07-02 2022-09-20 Spm Oil & Gas Inc. Valve for reciprocating pump assembly

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110030213A1 (en) * 2009-08-07 2011-02-10 Weir Spm, Inc. Hydraulic installation tool for pump plunger
UA109683C2 (uk) 2010-12-09 2015-09-25 Зміщений клапанний отвір у поршневому насосі
JP5806310B2 (ja) * 2011-06-23 2015-11-10 平田機工株式会社 ワーク支持装置
US9073183B2 (en) * 2012-04-17 2015-07-07 Chieh-Yuan Chen Rotary device for a cutting tool assembling and disassembling apparatus
US20150068007A1 (en) * 2013-09-12 2015-03-12 Kenneth James Conques Pump Plunger Alignment Device
CA2931644C (fr) 2013-11-26 2019-08-06 S.P.M. Flow Control, Inc. Siege de vanne a utiliser dans des pompes de fracturation
US10302080B2 (en) * 2015-05-01 2019-05-28 Graco Minnesota Inc. Two piece pump rod
US10655616B1 (en) 2018-05-22 2020-05-19 Qes Pressure Control Llc Plunger tool for reciprocation pump
US10808846B1 (en) * 2019-05-14 2020-10-20 Halliburton Energy Services, Inc. Pump plunger with wrench features

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990079544A (ko) * 1998-04-07 1999-11-05 카오루 수에요시 플런저펌프 및 그 시스템
KR100402825B1 (ko) * 2001-03-21 2003-10-22 김도훈 압력이 자동 조절되는 플런저 펌프의 패킹구조
US6415487B1 (en) * 2001-05-31 2002-07-09 Dana Corporation Service tool for removal of valve seal assembly
US7425120B2 (en) * 2005-04-26 2008-09-16 Wanner Engineering, Inc. Diaphragm position control for hydraulically driven pumps
US7665974B2 (en) * 2007-05-02 2010-02-23 Wanner Engineering, Inc. Diaphragm pump position control with offset valve axis

Cited By (6)

* 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
US10240597B2 (en) 2012-02-03 2019-03-26 S.P.M. Flow Control, Inc. Pump assembly including fluid cylinder and tapered valve seats
USD856498S1 (en) 2013-01-31 2019-08-13 S.P.M. Flow Control, Inc. Valve seat
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
US20100325888A1 (en) 2010-12-30
WO2011002902A3 (fr) 2011-03-31

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