WO2019173231A1 - Enveloppe de joint d'étanchéité de soupape - Google Patents

Enveloppe de joint d'étanchéité de soupape Download PDF

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Publication number
WO2019173231A1
WO2019173231A1 PCT/US2019/020584 US2019020584W WO2019173231A1 WO 2019173231 A1 WO2019173231 A1 WO 2019173231A1 US 2019020584 W US2019020584 W US 2019020584W WO 2019173231 A1 WO2019173231 A1 WO 2019173231A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
wrap
seal insert
valve assembly
valve member
Prior art date
Application number
PCT/US2019/020584
Other languages
English (en)
Inventor
Gideon Nathanael SPENCER
Jeff Myers
Original Assignee
S.P.M. 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 S.P.M. Flow Control, Inc. filed Critical S.P.M. Flow Control, Inc.
Publication of WO2019173231A1 publication Critical patent/WO2019173231A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • 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
    • F04B53/1087—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring

Definitions

  • This disclosure relates in general to valves for reciprocating pumps, and more particularly, to valve assemblies incorporating seal inserts, and even more particularly, to valve assemblies incorporating seal inserts having a protective wrap.
  • fracturing fluid i.e.. cement, mud, frac sand and other material
  • fracturing fluid is pumped at high pressures into a wellbore to cause the producing formation to fracture.
  • One commonly used pump in hydraulic fracturing is a high pressure reciprocating pump, like the SPM® DestinyTM TWS 2500 frac pump, manufactured by S.P.M. Flow Control, Inc. of Fort Worth, Texas. Accordingly, the fracturing fluid is caused to flow into and out of a pump fluid chamber as a consequence of the reciprocation of a piston-like plunger respectively moving away from and toward the fluid chamber.
  • the pressure inside the chamber decreases, creating a differential pressure across an inlet valve, drawing the fracturing fluid through the inlet valve into the chamber.
  • the pressure inside the chamber substantially increases until the differential pressure across an outlet valve causes the outlet valve to open, enabling the highly pressurized fracturing fluid to discharge through the outlet valve into the wellbore.
  • valves and valve seats Because of the high operating pressures (oftentimes up to 15,000 psi) and the abrasive solid particles associated with the fracturing fluid, the mating surfaces on valves and valve seats tend to wear at a rapid rate, and thus, the valves and valve seats are replaced frequently. This is principally due to the extremely high fluid pressures creating excessive axial loads on the mating surfaces, which become worn and pitted due to particulate from the fracturing fluid being trapped there between.
  • Seal inserts such as, for example, urethane seal inserts, are oftentimes mounted onto one or more of the mating surfaces to decrease damage to the mating surfaces. However, such seal inserts are also susceptible to damage and failure due to the particulate from the fracturing fluid.
  • the seal inserts are less susceptible to the wear and tear and ultimate failure to thereby increase the life of the overall valve assembly.
  • a valve assembly including a valve member and a valve seat body.
  • the valve member is reciprocatably movable toward and away from mating engagement with the valve seat body.
  • the assembly further includes a seal insert positioned to be at the situs of engagement of the valve member with the valve seat body.
  • a protective covering or wrap is disposed over and/or around the seal insert to decrease the damage to the insert and, thus, increase the operating life of the valve assembly.
  • the protective covering or wrap is positioned to cover and/or cushion at least a portion of the seal insert.
  • a valve assembly comprises a valve member, a valve seat body, the valve member reciprocatably movable into and out of engagement with the valve seat body, a seal insert positioned to be at the situs of engagement of the valve member with the valve seat body, and a wrap covering at least a portion of the seal insert.
  • the wrap is positioned to cover at least a portion of the seal insert and, optionally, at least a portion of the valve member.
  • the wrap is disposed around an entirety of the seal insert.
  • the wrap is positioned to cover the seal insert so as to prevent direct contact between the seal insert and the valve seat body.
  • the wrap is positioned to cover the seal insert.
  • the wrap is positioned to cushion the seal insert.
  • the seal insert is disposed on the valve member.
  • the seal insert is formed of a thermoplastic material or urethane.
  • the seal insert is formed of a thermoplastic material.
  • the seal insert is formed of urethane.
  • the seal insert includes fiber or organic reinforcing material.
  • the fiber or organic reinforcing material is randomly disposed or specially oriented within the seal.
  • the fiber or organic reinforcing material is formed of carbon, fibers, glass fibers, cotton fibers, and combinations thereof.
  • the fiber is formed of flat woven fabrics or fiber webs that include fiber bundles.
  • the reinforcing material is formed of a fiber, a film, a mat, a mesh, a rod, a sheet, and combinations thereof.
  • the seal insert is a single piece or layer or a multiple piece or layer.
  • the seal insert has a hardness of greater than 95A durometer and less than a hardness of the valve member and/or valve body.
  • the seal insert has a hardness of greater than 60D durometer and less than a hardness of the valve member and/or valve body.
  • the wrap is formed of an abrasion resistant material.
  • the wrap is formed of a durable fiber material, a flexible, high-temperature material, a high molecular weight material, a strong material, and combinations thereof.
  • the wrap is formed of at least one of a fiberglass, a polytetrafluorethylene (PTFE), a fluorinated ethylene propylene copolymer (FEP), a perfluoroalkoxy (PFA), a copolymer of ethylene and tetrafluoroethylene (PTFE), an ultra- high molecular weight polyethylene (UHMwPE), a high molecular weight polyethylene (HMwPE), a high molecular weight polypropylene (HMwPP), a high density polyethylene (HDPE), a high density polypropylene (HDPP), an organic fiber in the polyamide family, a polyamide, or a combination thereof.
  • PTFE polytetrafluorethylene
  • FEP fluorinated ethylene propylene copolymer
  • PFA perfluoroalkoxy
  • PTFE polytetrafluoroethylene
  • UHMwPE ultra- high molecular weight polyethylene
  • HMwPE high molecular weight polyethylene
  • the wrap includes fiber or organic reinforcing material.
  • the fiber or organic reinforcing material is randomly disposed or specially oriented within the wrap.
  • the fiber or organic reinforcing material is formed of carbon, fibers, glass fibers, cotton fibers, and combinations thereof.
  • the fiber is formed of flat woven fabrics or fiber webs that include fiber bundles.
  • the reinforcing material is formed of a fiber, a film, a mat, a mesh, a rod, a sheet, and combinations thereof.
  • the wrap is a single piece or layer or a multiple piece or layer.
  • the wrap is secured in place using a metal fitting, a plastic fitting, an adhesive, and combinations thereof.
  • the wrap is secured in place using a metal fitting, a plastic fitting, and combinations thereof.
  • the wrap is secured in place using an adhesive.
  • the adhesive is formed of an epoxy adhesive, a polyamide adhesive, a polyurethane adhesive, and combinations thereof.
  • valve assembly comprises a valve seat body, a valve member, the valve member reciprocatably movable into and out of engagement with the valve seat body, a seal insert disposed within a cavity of the valve member and positioned to be at the situs of engagement of the valve member with the valve seat body, and a wrap covering a surface of the seal insert and forming a barrier between the surface of the seal insert and the valve seat body.
  • the wrap is positioned to cover at least a portion of the valve member.
  • the wrap is disposed around the entirety of the seal insert.
  • a valve member for use with a valve assembly comprises an upper valve body portion having an annular engagement surface for contacting the valve seat body, an annular cavity disposed in the engagement surface, a seal insert disposed within the annular cavity, the seal insert forming a portion of the engagement surface, and a wrap covering at least a portion of the seal insert.
  • the valve member is reciprocatingly movable into and out of engagement with the valve seat body.
  • the wrap is positioned to cover at least a portion of the engagement surface.
  • the wrap is disposed around the entirety of the seal insert.
  • the wrap is positioned between the valve member and the seal insert to separate the seal insert from an inner surface of the cavity.
  • a method of manufacturing a valve member for use with a valve assembly comprises forming a cavity in the valve member, installing a seal insert within the cavity, and covering a surface of the seal insert with a wrap to form a barrier between the surface of the seal insert and the valve seat body.
  • the valve assembly comprises a valve seat body. Further, the valve member is reciprocatably movable into and out of engagement with the valve seat body.
  • the installing the seal insert within the cavity step comprises securing the wrap to the valve member to enclose the cavity in the valve member; and injecting the seal insert material through a passageway formed in the valve member and into the enclosed cavity to fill the enclosed cavity.
  • the method further comprises covering the at least a portion of the valve member with the cover.
  • the method further comprises covering at least a portion of the seal insert with the cover between the cavity sidewall and the seal insert.
  • FIG. 1 is a side sectional view of a valve assembly having a seal insert in which a wrap disposed over the seal insert is employed to advantage.
  • FIG. 2A is an enlarged view of a portion of the valve assembly of FIG. 1 in the open position illustrating the wrap positioned to cover the seal insert and a portion of the valve member.
  • FIG. 2B is an enlarged view of a portion of the valve assembly of FIGS. 1 and 2A positioned in a closed position.
  • FIG. 2C is an enlarged view of a valve assembly in which an injection gate/passageway is employed to advantage.
  • FIG. 2D is a top view of the valve assembly of FIG. 2C.
  • FIG. 2E is an enlarged view of a portion of a valve assembly in the open position illustrating a wrap positioned to cover a portion of the valve member and to cushion a portion of the seal insert.
  • FIG. 2F is an enlarged view of a portion of the valve assembly of FIG. 2E positioned in the closed position.
  • FIG. 2G is an enlarged view of a portion of a valve assembly in the open position illustrating a wrap positioned to cover a portion of the seal insert and a portion of the valve member, and to cushion a portion of the seal insert.
  • FIG. 2H is an enlarged view of a portion of the valve assembly of FIG. 2G positioned in the closed position.
  • FIG. 3 is a simplified diagrammatic illustration of a portion of a reciprocating pump assembly incorporating the valve assemblies described herein as the inlet and outlet valves of the pump fluid chamber.
  • a valve assembly 11 includes a reciprocatably movable valve member 12 adapted for movement into and out of engagement (as illustrated by arrow 23) with a valve seat body 13.
  • the valve assembly 11 incorporates at least one seal insert 33 with a wrap 33e positioned to cover or otherwise protect the insert 33 from damage due to repetitive high impact of the valve against the seat and high flow rates of fluid (i.e., slurry, with highly abrasive materials, and corrosive fluids, like acids) running over the surface of the seal insert 33 during operation.
  • fluid i.e., slurry, with highly abrasive materials, and corrosive fluids, like acids
  • the valve seat body 13 typically formed of metal such as cast steel, is preferably a tubular shaped member 15 defining an inner wall portion 18 symmetrically and axially disposed around a central axis 22.
  • the valve seat body 13 has an inclined/conical seating surface 17 at its upper end that extends from an inner wall portion 18 to an outer wall portion 19.
  • the conical contour of seating surface 17 is disposed at an angle 20, which is relative to a plane that is perpendicular to the central axis 22, and which in the embodiment shown also corresponds to the angle of the engagement surface 32 on the valve member 12.
  • some embodiments optionally include an annular seal 21 extending around the exterior of the seat body 13 to enable it to seal when mounting within a flow passage of the pump.
  • the valve member 12 also formed of metal such as cast steel, is reciprocatably movable between an open position (i.e., the valve member 12 is spaced apart from the valve seat body 13 as illustrated in FIGS. 2A, 2E and 2G), and a closed position (i.e., the valve member 12 mates with and otherwise engages the valve seat body 13 as illustrated in FIGS. 2B, 2F and 2H) in response to differential pressure within the pump.
  • the valve member 12 includes three legs 25 having outer ends 27 slideably engaging the inner sidewall 18 of the tubular shaped member 15.
  • the legs 25 are secured to or otherwise integral with a central stem 29, which extends upwardly along the central axis 22 to an upper valve body portion 31.
  • an upper valve body portion 31 flares radially outward from the stem 29 and has a downwardly and outwardly -facing annular seal/engagement surface 32 at its outer diameter.
  • the engagement surface 32 of the valve member 12 is biased into engagement with the seating surface 17 of the valve seat body 13 in the closed position, and biased out of engagement from the seating surface 17 in the open position.
  • a boss 40 extends from the upper end of the upper valve body 31 and is coaxial with the central axis 22.
  • a biasing member such as a coiled spring 75 is disposed between the boss 40 and a portion of the manifold housing of the pump (not illustrated).
  • differential pressure acting on the valve body portion 31 causes the valve member 12 to move in the direction of upward (direction shown by arrow 9) to separate the engagement surface 32 from the seating surface 17. This movement compresses coiled spring 75 and enables fluid flow through the tubular shaped member 15 and between engagement surface 32 and seating surface 17.
  • the stored energy in coiled spring 75 overcomes the differential pressure and exerts a closing force on the valve member 12 to move the valve member 12 in a downward direction (direction shown by arrow 10) to the closed position (FIGS. 2B, 2F and 2H), thereby preventing fluid flow between the engagement surface 32 and the seating surface 17.
  • the seal insert 33 is formed of a first surface 33a, a second surface 33b, and a pair of side surfaces 33c and 33d.
  • the engagement surface 32 includes an annular cavity 34 having an inner surface for securing the seal insert 33 therein, although the engagement surface 32 is optionally formed without an annular cavity 34 such that the seal is directly couplable to the engagement surface 32 via an adhesive or otherwise.
  • the annular cavity 34 is generally disposed at the outer portions of the engagement surface 32; however, the annular cavity 34 may be otherwise positionable (i.e., centrally disposed on surface 32 or at any other position).
  • the cavity 34 can be of any width, depth and/or shape to secure seal insert 33 (and potentially the wrap 33e) therein. In the embodiment illustrated in FIGS.
  • the annular cavity 34 optionally includes a chamfer 35 to enable the seal insert 33 (and potentially the wrap 33e) to deform at least partially within the space defined by the chamfer 35. Deformation of the seal insert 33 (and potentially the wrap 33e) within the space defined by the chamfer 35 enables metal to metal contact between the surfaces 17 and 32 without causing damage to the seal insert 33 and/or the wrap 33e.
  • the wrap 33e covers and otherwise protects the exposed surface of the seal insert 33 and at least a portion of the valve member 12 from abrasion. See also FIGS. 2E-2H.
  • the wrap 33e is sized only to protect the exposed surface of the seal insert 33.
  • the wrap 33e is sized to protect the exposed surface of the seal insert 33 and the entirety of the surface 32 of the valve member 12. See e.g., FIGS. 2G-2H. It should be understood that in addition to or in lieu of providing a seal insert 33 on the surface 32 of the valve member 12, a seal member 33 may be positioned on the seating surface 17 of the valve seat 13.
  • the wrap 33e be machined, molded and/or wrapped to cover the seal insert 33 and as applicable, the portion of the valve member 12. It should be understood that the wrap 33e may be a single piece or layer or a multi-piece or layer and can be formed of a sheet to overlay or formed having a pocket in which the seal insert is disposed therein prior to attachment to the valve member 12.
  • the wrap 33e in addition to covering the seal insert 33 and optionally, the surface 32 of the valve member 12, the wrap 33e may be disposed inside the cavity 34 between the inner surface of the cavity 34 and the seal insert 33 in order to cushion or otherwise support the seal 33. See e.g., FIGS. 2E-2H.
  • the wrap 33e maybe machined, molded and/or wrapped to cover the portion of the valve member 12 and to cushion or support the seal 33. It should be understood that the wrap 33e may be a single piece or layer or a multi-piece or layer and can be formed of a sheet to overlay or formed having a pocket in which the seal insert is disposed therein prior to attachment to the valve member 12.
  • the wrap 33e is formed of an abrasion resistant material.
  • the wrap 33e may be formed of a durable fiber material including, for example, a fiberglass, a flexible, high-temperature material including, for example, a polytetrafluorethylene (PTFE) (e.g., TEFLON® (DuPont Co.)), a fluorinated ethylene propylene copolymer (FEP) (e.g., TEFLON (DuPont Co.)), a perfluoroalkoxy (PFA) (e.g., TEFLON (DuPont Co.)), a copolymer of ethylene and tetrafluoroethylene (PTFE) (e.g., TEFZEL® (DuPont Co.)), and combinations thereof, a high molecular weight material including, for example, an ultra-high molecular weight polyethylene (UHMwPE) (e.g., DYNEEMA® (DSM)),
  • UHMwPE ultra-high mole
  • the wrap 33e optionally includes fiber or organic reinforcement such as, for example, carbon fibers, glass fibers, cotton fibers, or other organic reinforcing material, or combinations thereof, that can be either randomly disposed or specially oriented within the wrap.
  • the fiber reinforcement is optionally formed of flat woven fabrics or fiber webs that include fiber bundles having a large number of individual fibers. Fiber reinforcement is utilized to prevent and/or otherwise reduce the likelihood of delamination of the wrap 33e.
  • the material may in any suitable form.
  • the material may be a fiber, a film, a mat, a mesh, a rod, a sheet, and a combination thereof.
  • the wrap 33e may be a single piece or layer or a multiple piece or layer.
  • the wrap 33e may be any suitable thickness.
  • the wrap 33e may be thicker than the seal insert 33.
  • the wrap 33e may be about the same thickness as the seal insert 33.
  • the wrap 33e may also be thinner than the seal insert 33.
  • the wrap 33e can be secured in place using a metal fitting, a plastic fitting or a combination thereof.
  • a metal fitting e.g., a TEFLON® (DuPont Co.)
  • plastic fittings may be formed of a high-temperature material including, for example, polytetrafluorethylene (PTFE) (e.g., TEFLON® (DuPont Co.)).
  • PTFE polytetrafluorethylene
  • the wrap 33e may be secured in place using an adhesive. Any suitable adhesive may be used.
  • the adhesive may be formed of a polymer material including, for example, an epoxy adhesive, a polyamide adhesive, a polyurethane adhesive and combinations thereof.
  • the seal insert 33 is formed of a conventional thermoplastic material including, for example, urethane.
  • the seal 33 optionally includes fiber or organic reinforcement such as, for example, carbon fibers, glass fibers, cotton fibers, or other organic reinforcing material, or combinations thereof, that can be either randomly disposed or specially oriented within the seal.
  • the fiber reinforcement is optionally formed of flat woven fabrics or fiber webs that include fiber bundles having a large number of individual fibers. Fiber reinforcement is utilized to prevent and/or otherwise reduce the likelihood of delamination of the seal 33.
  • the seal 33 is formed having a hardness of 95A durometer, or greater.
  • the seal 33 is formed to have a hardness value of 60D durometer or more but in no event, greater than the hardness and rigidity of the valve member 12 and/or the valve body 13.
  • the seal insert 33 may be a single piece or layer or a multiple piece or layer.
  • the seal insert 33 may be any suitable thickness.
  • the seal insert 33 may be thicker than the wrap 33e.
  • the seal insert 33 may be about the same thickness as the wrap 33e.
  • the seal insert 33 may also be thinner than the wrap 33e.
  • the valve assembly 11 employs an injection gate/passageway 52 disposed on the valve body 12 extending between the valve body top surface 54 and the annular cavity 34.
  • the passageway 52 enables the seal insert material 33 (urethane or otherwise) to be injected into the annular cavity 34 after the wrap material 33e has been secured to the valve assembly 11.
  • the wrap 33e is secured to the valve body 12 without the seal insert 33 inside the cavity 34.
  • the wrap 33e can be secured to the valve assembly 11 in its entirety (i.e., without the necessity to form an opening through the wrap 33e or between the wrap 33e and the valve body 12) during the injection process. This reduces and/or otherwise minimizes the likelihood of creating a weak spot in the wrap 33e or the connection thereof to the valve body 12
  • the passageway 52 may be formed of a cross section having a different size (i.e., larger or smaller). In some embodiments, the passageway 52 is formed having a cross sectional area that varies in size along the length of the passageway 52. In addition, it should be understood that while passageway 52 is formed having a substantially straight path, the passageway 52 may extend otherwise, such as, for example, in a curved path. In still other embodiments, while the passageway 52 is formed through the top surface 54, it may be otherwise located, such as, for example, on the side of the valve body 12 in which the passageway would curve toward the annular cavity 34.
  • a single passageway 52 is illustrated. It should be understood however, that more than one passageway 52 can be utilized.
  • a plurality of passageways 52 can be formed circumferentially at spaced apart intervals around the valve body 12 top surface 54. It should also be understood that in embodiments in which a seal insert 33 is disposed in the valve seat body 13, a corresponding passageway 52 may also be formed in the valve seat body 13.
  • valve assemblies 11 may be used to particular advantage when incorporated with a reciprocating pump apparatus, for example, the reciprocating pump apparatus of the type disclosed and described in U.S. Patent 7,364,412, issued April 29, 2008, and assigned to the assignee of the present disclosure.
  • a reciprocating pump apparatus for example, the reciprocating pump apparatus of the type disclosed and described in U.S. Patent 7,364,412, issued April 29, 2008, and assigned to the assignee of the present disclosure.
  • the description in such patent is incorporated by reference in its entirety. For example, and as diagrammatically illustrated in FIG.
  • any herein described valve assembly 11 may be used as an inlet valve 100 and/or an outlet valve 102 to move fluid back and forth from a fluid chamber 104 with a reciprocally movable piston 105, thereby respectively opening the inlet valve 100 to draw fracturing fluid into the chamber 104 (with outlet valve spring biased closed) and opening the outlet valve 102 to allow the fluid to flow there through (with inlet valve spring biased closed).
  • the valve assembly 11 is manufactured by providing a valve seat body having a tubular shaped member 15 and a seating surface 17.
  • the method further includes positioning a valve member 12 at least partially within the tubular shaped member 15, the valve member 12 having an engagement surface 32 to contact the seating surface 17 when the valve member 12 is in a closed position.
  • the method also includes securing a seal insert 33 (and, possibly, a wrap 33e) to at least one of the seating surfaces 17 or the engagement surfaces 32.
  • the method also includes securing the seal insert 33 (and, possibly, the wrap 33e) within the cavity 34 on the at least one of the seating surface 17 or the engagement surface 32.
  • the seal insert 33 (and, possibly, the wrap 33e) is preferably molded in place such that the first surface 33a and at least a portion of the side surfaces 33d and 33e are disposed within the cavity 34; however, the seal 33 (and the wrap 33e) can be otherwise installed and secured within the cavity 34. Furthermore, the seal assembly 33 (and the wrap 33e) is also attachable on top of the seal surfaces 32 (via an adhesive or otherwise) not having the cavities 34.
  • valve member 12 has been described as having a plurality of legs 25, a variety of different designs may be employed for the valve members.
  • the angle of the engagement surfaces of the valve member and valve seat body are the same, the principles of operation are the same if the angles slightly differ.
  • valve assemblies have been described herein to operate in conjunction with reciprocating pumps in the presence of highly abrasive fluids, such as fracturing fluids, it is to be understood that many other applications for said valve assemblies he within the scope of the invention.
  • the valve assemblies can be used in pumps pumping drilling fluid directly into the well bore, mining slurry through a pipeline, in pumps that are used to plump fluid with fluid particulars, or in applications other than pumps.
  • the word“comprising” is to be understood in its “open” sense, that is, in the sense of“including”, and thus not limited to its“closed” sense, that is the sense of“consisting only of’.
  • a corresponding meaning is to be attributed to the corresponding words“comprise”,“comprised” and“comprises” where they appear.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)

Abstract

L'invention concerne un ensemble de soupape comprenant un élément soupape et un corps de siège de soupape. L'élément soupape peut se déplacer en va-et-vient en et hors de coopération avec le corps de siège de soupape. L'ensemble comprend en outre un insert d'étanchéité positionné pour se trouver aux endroits de coopération entre l'élément soupape et le corps de siège de soupape. L'ensemble comprend en outre une enveloppe positionnée pour recouvrir l'insert d'étanchéité et pour recouvrir éventuellement une partie de l'élément soupape pour protéger l'insert d'étanchéité contre l'écoulement de fluides et contre un choc violent.
PCT/US2019/020584 2018-03-05 2019-03-04 Enveloppe de joint d'étanchéité de soupape WO2019173231A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862638779P 2018-03-05 2018-03-05
US62/638,779 2018-03-05

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WO2019173231A1 true WO2019173231A1 (fr) 2019-09-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115030893A (zh) * 2022-06-22 2022-09-09 烟台杰瑞石油装备技术有限公司 凡尔体及柱塞泵

Citations (6)

* Cited by examiner, † Cited by third party
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