WO2023045019A1 - 一种盘根包组件、液力端和柱塞泵 - Google Patents

一种盘根包组件、液力端和柱塞泵 Download PDF

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Publication number
WO2023045019A1
WO2023045019A1 PCT/CN2021/126681 CN2021126681W WO2023045019A1 WO 2023045019 A1 WO2023045019 A1 WO 2023045019A1 CN 2021126681 W CN2021126681 W CN 2021126681W WO 2023045019 A1 WO2023045019 A1 WO 2023045019A1
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WO
WIPO (PCT)
Prior art keywords
packing
ring
valve box
spacer ring
spacer
Prior art date
Application number
PCT/CN2021/126681
Other languages
English (en)
French (fr)
Inventor
姜琛
李晓斌
张树林
李朋
王继鑫
Original Assignee
烟台杰瑞石油装备技术有限公司
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Publication of WO2023045019A1 publication Critical patent/WO2023045019A1/zh

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    • 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
    • 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
    • F04B53/02—Packing the free space between cylinders and pistons
    • 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

Definitions

  • At least one embodiment of the present disclosure relates to a packing pack assembly, a liquid end, and a plunger pump.
  • Hydraulic fracturing construction has gradually become the main production stimulation measure in oilfields. It pumps fracturing fluid (including sand-carrying fluid) to the bottom of the well under high pressure to achieve fracturing operations, thereby increasing oil and gas production.
  • fracturing fluid including sand-carrying fluid
  • a key component of this method of operation is the plunger pump that generates the high-pressure fracturing fluid.
  • a plunger pump is mainly composed of two parts, the power end and the liquid end.
  • At least one embodiment of the present disclosure relates to a packing pack assembly, a liquid end and a plunger pump, and at least one embodiment of the present disclosure also relates to a conversion piece, a liquid end and a plunger pump.
  • At least one embodiment of the present disclosure relates to a packing pack assembly, fluid end, and plunger pump to resist wear.
  • At least one embodiment of the present disclosure provides a packing package assembly, including: a spacer ring; a pressure ring, the pressure ring and the spacer ring are arranged along the extension direction of the axis of the packing package assembly; and a sealing assembly, Located between the spacer ring and the pressure ring; the sealing assembly includes a first packing ring, the first packing ring is at least partially in contact with the spacer ring, and the first packing ring is close to the One of the surface of the spacer ring and the surface of the spacer ring close to the first packing ring includes a protrusion, and the surface of the first packing ring close to the spacer ring and the surface of the spacer ring close to the spacer ring Another of the surfaces of the first packing ring includes a recess, the protrusion being at least partially located within the recess.
  • the convex portion and the concave portion are at least partially in contact.
  • the cross-section of the contact surface between the first packing ring and the spacer ring in a plane passing through the axis includes at least one of a V-shape, an arc shape, a wave shape, and a zigzag shape.
  • one of the surface of the first packing ring that is close to the spacer ring and the surface of the spacer ring that is close to the first packing ring includes a plurality of recesses, and the surface of the first packing ring that is close to the spacer ring
  • the other of the surface of the spacer ring and the surface of the spacer ring close to the first packing ring includes a plurality of protrusions, and the plurality of recesses match the plurality of protrusions.
  • the surface of the spacer ring opposite to the surface in contact with the first packing ring has a sealing groove, and a sealing ring is arranged in the sealing groove.
  • the sealing assembly further includes two second packing rings, and the compression ring, the two second packing rings, the first packing ring, and the spacer ring The extension of said axis of the pack assembly is aligned.
  • the contact surface of the first packing ring and its adjacent second packing ring, the contact surface of the two second packing rings, the pressure ring and its adjacent second packing ring includes at least one of a V shape, an arc shape, a wave shape, and a zigzag shape.
  • At least one embodiment of the present disclosure further provides a fluid end, including any packing package assembly described above.
  • the liquid end further includes: a valve box, including a packing cavity, the packing cavity configured to accommodate the packing pack assembly; a packing pressure cap, configured to compress the packing pack assembly, and
  • the conversion piece is arranged between the valve box and the packing pressure cap, and is configured to connect the valve box and the packing pressure cap, and the material of the conversion piece is different from that of the valve box.
  • the conversion piece has a hardness greater than that of the valve box.
  • the outer end surface of the transition piece is fixedly connected with the valve box by welding.
  • the outer end surface of the transition piece is flush with the end surface of the valve box.
  • the conversion piece includes internal threads and external threads, the conversion piece is threaded to the valve box, and the conversion piece is threaded to the packing pressure cap.
  • the transition piece includes a main body portion and an extension portion located at a first end of the main body portion, and the extension portion protrudes from the main body portion toward the axis of the transition piece.
  • the transition piece further includes a plurality of depressions located at the second end of the main body, the first end and the second end are opposite ends of the transition piece, and the plurality of depressions are evenly distributed layout.
  • At least one embodiment of the present disclosure also provides a plunger pump, including any fluid end described above.
  • At least one embodiment of the present disclosure relates to a transition piece, a fluid end, and a plunger pump to prevent a valve box and a packing gland from becoming unusable due to threaded adhesive snapping.
  • At least one embodiment of the present disclosure provides a transition piece, the transition piece is cylindrical and includes a channel extending from a first end of the transition piece to a second end of the transition piece, the first end and the The second end is the two opposite ends of the transition piece, the transition piece includes a main body, the inner surface of the main body includes internal threads, and the outer surface of the main body includes external threads.
  • the transition piece further includes an extension portion located at the first end of the main body portion, and the extension portion protrudes from the main body portion toward the axis of the transition piece.
  • the size of the extension part in the radial direction of the conversion part is larger than the size of the main part in the radial direction of the conversion part, and smaller than two times the size of the main part in the radial direction of the conversion part. times.
  • the transition piece further includes a plurality of depressions located at the second end of the main body, and the plurality of depressions are evenly distributed.
  • At least one embodiment of the present disclosure provides a liquid end, including: a valve box, including a packing cavity; a packing pack assembly, located in the packing cavity; and a packing pressure cap, at least partially located in the packing cavity and is configured to press the packing pack assembly toward the inside of the valve box, and a conversion piece is arranged between the inner wall of the packing cavity of the valve box and the packing pressure cap, so that the valve
  • the box is connected to the packing pressure cap
  • the transition piece is cylindrical and includes a channel extending from the first end of the transition piece to the second end of the transition piece, the transition piece includes a main body, the The inner surface of the main body includes internal threads, the outer surface of the main body includes outer threads, and the material of the transition piece is different from that of the valve box.
  • the material of the valve box includes stainless steel.
  • the conversion piece has a hardness greater than that of the valve box.
  • the thermal conductivity of the transition piece is greater than the thermal conductivity of the valve box.
  • the outer end surface of the transition piece is fixedly connected with the valve box by welding.
  • the outer end surface of the transition piece is flush with the end surface of the valve box.
  • the conversion part is a circular structural part.
  • the transition piece includes a main body portion and an extension portion located at a first end of the main body portion, and the extension portion protrudes from the main body portion toward the axis of the transition piece.
  • the transition piece further includes a plurality of depressions located at the second end of the main body, the first end and the second end are opposite ends of the transition piece, and the plurality of depressions are evenly distributed layout.
  • the conversion piece is connected to the valve box through the external thread, and the conversion piece is connected to the packing pressure cap through the internal thread.
  • the fluid end further includes a plunger
  • the valve box further includes a plunger chamber
  • the plunger is disposed in the plunger chamber.
  • At least one embodiment of the present disclosure also provides a plunger pump, including any fluid end described above.
  • Figure 1 is a schematic diagram of a fluid end.
  • Fig. 2 is a schematic diagram of the packing package assembly of the fluid end in Fig. 1 .
  • Fig. 3 is a schematic diagram of a packing package assembly provided by an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of a fluid end including the packing pack assembly shown in FIG. 3 provided by an embodiment of the present disclosure.
  • Fig. 5 is a schematic diagram of a packing package assembly provided by another embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of a fluid end including the packing pack assembly shown in FIG. 5 provided by an embodiment of the present disclosure.
  • Fig. 7 is a partial schematic diagram of a liquid end provided by an embodiment of the present disclosure.
  • Fig. 8 is a perspective view of a conversion element provided by an embodiment of the present disclosure.
  • Fig. 9 is a partial schematic diagram of a fluid end provided by an embodiment of the present disclosure.
  • Fig. 10 is a schematic perspective view of a conversion element provided by another embodiment of the present disclosure.
  • the present disclosure addresses the problem that the valve box 101 and the packing package assembly 103 are easily worn, and provides a wear-resistant packing package assembly, a fluid end containing the packing package assembly, and a column containing the fluid end plug pump.
  • Fig. 1 is a partial schematic diagram of a fluid end.
  • the liquid end includes a valve box 101 , a plunger 102 , a packing package assembly 103 , and a packing pressure cap 104 .
  • the material of the valve box 101 includes stainless steel.
  • the packing cap 104 is an important part of the liquid end, and its main function is to press the packing package assembly 103 into the packing cavity of the valve box 101 through the thread structure.
  • the plunger 102 reciprocates rapidly, it can realize High-pressure hydraulic seal at the plunger.
  • the plunger 102 can reciprocate in the plunger cavity, so that the hydraulic end of the plunger pump sucks in low-pressure liquid and discharges high-pressure liquid.
  • packing pack assembly 103 is located in the packing cavity.
  • the packing cavity is configured to receive a packing pack assembly.
  • the packing gland 104 is located at least partially within the packing cavity and is configured to compress the packing pack assembly 103 toward the interior of the valve box 101 .
  • the crank linkage mechanism in the power end drives the plunger in the liquid end to reciprocate, and the packing pressure cap 104 can lock the packing package assembly 103 (packing seal assembly) in the liquid end , when the plunger is constantly reciprocating, it can realize the sealing of the high-pressure fluid at the plunger.
  • Fig. 2 is a schematic diagram of the packing package assembly of the fluid end in Fig. 1 .
  • the packing package assembly 103 includes a sealing assembly 1031 , a spacer ring 1032 , and a pressure ring 1033 .
  • the pressure ring 1033 and spacer ring 1032 are arranged along the extension direction of the axis C0 of the packing pack assembly.
  • the seal assembly 1031 includes a first packing ring 1031a and a second packing ring 1031b.
  • FIG. 2 is illustrated by taking the sealing assembly 1031 including one first packing ring 1031a and two second packing rings 1031b as an example.
  • the hardness of the first packing ring 1031a is less than the hardness of the second packing ring 1031b.
  • the first packing ring 1031a is a floppy disk root ring
  • the second packing ring 1031b is a hard disk root ring.
  • the material of the first packing ring 1031a includes rubber.
  • the material of the second packing ring 1031b includes fiber-containing rubber.
  • the second packing ring 1031b includes cloth rubber.
  • the material of the first packing ring 1031a and the material of the second packing ring 1031b are not limited to the above examples, and can be determined according to requirements.
  • the packing package assembly 103 is installed in the packing cavity of the valve box 101, and the plunger is set in the plunger cavity of the valve box 101.
  • the plunger 102 will reciprocate rapidly Movement, alternating loads are generated in the cavity, the surface of the packing pressure cap 104 is a threaded structure, and the packing package assembly 103 is pressed tightly in the packing cavity of the valve box 101 by screwing the threads, and the high-pressure liquid at the plunger is Sealed to prevent leakage.
  • the above-mentioned packing pack assembly 103 has the following disadvantages or deficiencies when in use: as shown in Figure 1 and Figure 2, since it is a fracturing operation, the cavity of the valve box 101 is filled with sand-carrying fracturing fluid, during the operation, The fracturing sand will enter the gap between the packing pack assembly 103 and the valve box 101 through the gap between the valve box 101 and the spacer ring 1032, and the gap between the spacer ring 1032 and the first packing ring 1031a (soft disk root ring). In the gap, due to the continuous and rapid alternating loads generated in the cavity of the valve box 101, the packing package assembly 103 will also continuously move left and right.
  • the packing package assembly 103 After a period of use, the packing package assembly 103 will be worn out and cannot be used. root package 103. After replacing the packing pack 103 many times, the inner wall of the valve box 101 will be severely dented due to wear and tear. In this case, even if the packing pack assembly is replaced with a new one, the high-pressure liquid in the valve box cannot be well sealed, resulting in failure to use.
  • FIG. 3 is a schematic diagram of a packing package assembly provided by an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of a fluid end including the packing pack assembly shown in FIG. 3 provided by an embodiment of the present disclosure.
  • the packing package assembly 203 includes a sealing assembly 2031 , a spacer ring 2032 , and a compression ring 2033 .
  • the pressure ring 2033 and the spacer ring 2032 are arranged along the extension direction of the axis C0 of the packing pack assembly 203 .
  • the seal assembly 2031 includes a first packing ring 2031a.
  • the first packing ring 2031a is adjacent to the spacer ring 2032 .
  • that element A and element B are adjacent means that no other element A and no other element B are provided between the element A and element B.
  • the first packing ring 2031 a is in at least partial contact with the spacer ring 2032 .
  • the contact surface between the first packing ring 2031a and the spacer ring 2032 is V-shaped, forming a wear-resistant packing pack assembly and a wear-resistant liquid end.
  • the surface of the first packing ring 2031a in contact with the spacer ring 2032 is V-shaped
  • the surface of the spacer ring 2032 in contact with the first packing ring 2031a is V-shaped
  • the contact surface between 2031a and the spacer ring 2032 is V-shaped, which can increase the contact area to prevent the fracturing sand in the liquid from entering the gap between the valve box 101 and the packing package assembly 103 during operation, avoiding prolonged Use wear valve box 101 and packing package assembly 103 to prolong service life.
  • the service life of the valve box 101 and the packing package assembly 203 is extended, which can reduce the number of on-site maintenance and improve the operation efficiency, which plays an important role in the safe and stable operation of the equipment.
  • the spacer ring 2032 functions to separate the sealing assembly 2031 from the valve box 101 in the first direction X
  • the pressure ring 2033 functions to compress the sealing assembly 2031
  • the spacer ring 2032 and the pressure ring 2033 can be made of metal or plastic materials.
  • the metal includes copper
  • the plastic includes polyetheretherketone (PEEK), but not limited thereto.
  • the spacer ring 2032 and the pressure ring 2033 can be selected from appropriate materials according to requirements.
  • the spacer ring 2032 and the first packing ring 2031a The opposite surface of the contact surface has a sealing groove (groove) 320 , and a sealing ring 121 is arranged in the sealing groove 320 .
  • the sealing ring 121 is set in the sealing groove 320 of the spacer ring 2032 to prevent the fracturing sand from entering the gap between the valve box 101 and the packing package assembly 103 and wear the valve box 101 and the packing package assembly 103, thereby prolonging the service life. Reduce the number of on-site maintenance, improve operating efficiency, and benefit the safe and stable operation of the equipment.
  • seal Assembly 2031 also includes a second packing ring 2031b.
  • FIG. 2 is illustrated by taking the sealing assembly 2031 including one first packing ring 2031a and two second packing rings 2031b as an example.
  • the hardness of the first packing ring 2031a is less than the hardness of the second packing ring 2031b.
  • the first packing ring 2031a is a floppy disk root ring
  • the second packing ring 2031b is a hard disk root ring.
  • the contact surface of the first packing ring 2031a and the second packing ring 2031b adjacent to it, the contact surface of two second packing rings 2031b, the pressure ring 2033 and the first packing ring adjacent to it includes at least one of V-shape, arc-shape, wave-shape, and zigzag shape.
  • the shape of the above-mentioned contact surface is not limited to the situation given above, as long as the area of the contact surface can be increased.
  • the first The contact surface between the first packing ring 2031a and the second packing ring 2031b is V-shaped, of course, other shapes that can increase the contact surface can also be used.
  • the contact surface of the second packing ring 2031b is V-shaped, of course, other shapes that can increase the contact surface can also be used.
  • the contact surface between the ring 203 and the second packing ring 2031b is V-shaped, and of course, other shapes that can increase the contact surface can also be used.
  • the sealing ring 121 when in use, first install the sealing ring 121 into the sealing groove 320 of the spacer ring 2032, then put the spacer ring 2032 with the sealing ring 121 into the packing cavity of the valve box 101, and then load a first A packing ring 2031a, a second packing ring 2031b, another second packing ring 2031b, and a compression ring 2033, and finally use the packing pressure cap 104 to compress the entire packing package assembly 103 in the packing cavity, The plunger 102 is then installed so that the plunger 102 can seal the internal high-pressure liquid when it reciprocates.
  • FIG. 5 is a schematic diagram of a packing package assembly provided by another embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of a fluid end including the packing pack assembly shown in FIG. 5 provided by an embodiment of the present disclosure.
  • the difference between the packing package assembly 203 shown in FIG. 5 and the packing package assembly 203 shown in FIG. 3 is that: the contact surface between the first packing ring 2031a and the spacer ring 2032 is zigzag, and the disc shown in FIG. 5
  • the spacer ring 2032 in the root bag assembly 203 is not provided with a sealing groove.
  • the sealing groove 320 can be arranged in the valve box 101 .
  • the first direction X is perpendicular to the second direction Y.
  • the first direction X may be an axial direction
  • the second direction Y may be a radial direction.
  • one of the surface S1 of the first packing ring 2031a close to the spacer ring 2032 and the surface S2 of the spacer ring 2032 close to the first packing ring 2031a includes a convex portion PT1, and the first packing ring
  • the other of the surface S1 of the spacer 2031a close to the spacer ring 2032 and the surface S2 of the spacer 2032 close to the first packing ring 2031a includes a concave portion PT2, and the convex portion PT1 is at least partially located in the concave portion PT2, so that it is compatible with the first packing ring
  • the convex portion PT1 is at least partially located in the concave portion PT2, so that it is compatible with the first packing ring
  • the state of contact furthermore, prevents the fracturing sand in the liquid from entering the gap between the valve box 101 and the packing package assembly 103 during the operation, and wears the valve box 101 and the packing package assembly 103 .
  • the axis C0 of the packing pack assembly 203 extends along the first direction X.
  • Both can play a role in preventing the fracturing sand in the liquid from entering the gap between the valve box 101 and the packing package assembly 103 .
  • the surface S1 of the first packing ring 2031a close to the spacer ring 2032 and the surface S2 of the spacer ring 2032 close to the first packing ring 2031a are not as shown in the figure 3 shows complete contact, but there is a certain interval between the top end of the convex portion PT1 and the bottom end of the concave portion PT2, but both sides of the top end of the convex portion PT1 and both sides of the bottom end of the concave portion PT2 are in contact. That is, during the movement of the plunger, the surface S1 of the first packing ring 2031a close to the spacer ring 2032 and the surface S2 of the spacer ring 2032 close to the first packing ring 2031a are at least partially in contact.
  • the convex portion PT1 and the concave portion PT2 match.
  • one of the surface S1 of the first packing ring 2031a close to the spacer ring 2032 and the surface S2 of the spacer ring 2032 close to the first packing ring 2031a includes a plurality of protrusions PT1.
  • the surface S1 of a packing ring 2031a close to the spacer ring 2032 and the other surface S2 of the spacer ring 2032 close to the first packing ring 2031a include a plurality of concave parts PT2, and a plurality of convex parts PT1 and a plurality of concave parts PT2 match.
  • the contact surface between the first packing ring 2031a and the spacer ring 2032 is zigzag, it includes a plurality of convex portions PT1 and a plurality of concave portions PT2.
  • the axis C0 of the packing pack assembly 203 may coincide with the axis of the plunger 102 .
  • the axis C0 of the packing pack assembly 203 may coincide with the axis of the plunger cavity.
  • the axis C0 of the packing package assembly 203 may be the centerline C0 of the packing package assembly 203 .
  • the centerline C0 of the packing package assembly 203 may be a connecting line connecting the centers of at least two components in the packing package assembly 203 .
  • Each element in the packing package assembly 203 is annular.
  • the center of each element in the packing pack assembly 203 is the circle center of the element.
  • the contact surface of the first packing ring 2031 a and the spacer ring 2032 is not flat.
  • the contact surface of the first packing ring 2031 a and the spacer ring 2032 is the contact surface when the two are in full contact.
  • the cross-section of the contact surface of the first packing ring 2031 a and the spacer ring 2032 in a plane passing through the axis C0 includes at least one of V-shape, arc-shape, wave-shape, and saw-tooth shape.
  • the length of the contact surface of the first packing ring 2031a and the spacer ring 2032 in the cross-section of the plane passing through the axis C0 is greater than that of the contact surface of the first packing ring 2031a and the spacer ring 2032 The length in the radial direction of the packing package assembly 203 .
  • the arc may have a larger radian to obtain a larger contact area.
  • the central angle of the arc is greater than or equal to 60 degrees and less than or equal to 180 degrees, but not limited thereto.
  • the plane passing through the axis C0 includes the plane where the first direction X and the second direction Y are located, which may be the plane where the paper plane is located.
  • the first packing ring 2031 a and the spacer ring 2032 are arranged in the first direction X.
  • the pressure ring 2033 , the two second packing rings 2031 b , the first packing ring 2031 a , and the spacer ring 2032 are arranged sequentially in the first direction X.
  • a sealing groove 320 is provided in the valve box 101 .
  • the sealing groove 320 disposed in the valve box 101 is beneficial to the protection of the valve box 101 .
  • At least one embodiment of the present disclosure further provides a fluid end, including any packing package assembly described above.
  • At least one embodiment of the present disclosure also provides a plunger pump, including any fluid end described above.
  • the present disclosure improves the hydraulic end of the plunger pump for the buckling problem of the valve box 101 and the packing pressure cap 104 .
  • the material of the valve box in the industry is generally changed from carbon steel to stainless steel.
  • the stainless steel material has a high alloy content and good comprehensive performance. Meet the harsh working conditions on site and greatly improve the service life of the equipment.
  • the reasons for the snapping of the valve box 101 made of stainless steel are as follows: the packing cap 104 generates heat due to friction during rotation, and the thermal conductivity of stainless steel is relatively low (10-30w/m ⁇ °C, about 1% of that of carbon steel /3), when the pressure and heat generated destroy the chromium oxide layer, the thread teeth will be directly blocked/sheared, and due to the soft nature of stainless steel, adhesion will occur.
  • Fig. 7 is a partial schematic diagram of a liquid end provided by an embodiment of the present disclosure.
  • Fig. 8 is a three-dimensional schematic diagram of a conversion element provided by an embodiment of the present disclosure.
  • Fig. 9 is a partial schematic diagram of a fluid end provided by an embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a conversion piece 106 , the conversion piece 106 is cylindrical, the inner surface of the conversion piece 106 includes internal threads 1062 , and the outer surface of the conversion piece 106 includes external threads 1061 .
  • an embodiment of the present disclosure provides a conversion piece.
  • the conversion piece 106 is cylindrical, and the conversion piece 106 includes a main body 106 a.
  • the transition piece 106 is cylindrical and includes a channel 160 extending from the first end E1 of the transition piece to the second end E2 of the transition piece, the inner surface of the main body portion 106a includes internal threads, The outer surface of the main body portion 106a includes external threads.
  • the inner surface of the main body 106 a of the conversion piece 106 includes internal threads 1062
  • the outer surface of the main body 106 a of the conversion piece 106 includes external threads 1061 , so as to facilitate the connection between the conversion piece 106 and other components.
  • the transition piece 106 further includes an extension portion 106b located at one end of the main body portion 106a, and the extension portion 106b protrudes inward, that is, the extension portion 106b protrudes from the main body portion toward the axis A0 of the transition piece 106 106a.
  • the main body portion 106 a has a cylindrical shape with both ends opened.
  • the section of the transition piece 106 in a plane passing through the axis of the transition piece 106 is L-shaped.
  • the main body portion 106a and the extension portion 106b are integrally formed and integrally formed.
  • the extension portion 106 b in the conversion member 106 can serve the purpose of pressing the compression ring 1033 .
  • the conversion member 106 may not be provided with the extension portion 106b.
  • the extension part 106b is larger in the radial direction of the conversion part than the main body part 106a is in the radial direction of the conversion part. And less than twice the size of the main body portion 106a in the radial direction of the conversion element.
  • the radial direction of the transition piece is the direction of its diameter.
  • a recess 1060 is formed at one end of the transition member 106 .
  • the setting of the recess 1060 facilitates disassembly of the conversion part 106 by a disassembly tool.
  • a protrusion corresponding to the recess 1060 is provided on the removal tool.
  • a plurality of recesses 1060 are formed at one end of the conversion member 106 .
  • a plurality of depressions 1060 may be evenly distributed at one end of the main body portion 106 a to facilitate disassembly of the conversion member 106 .
  • the shape and size of the depression 1060 are not limited to those shown in FIG. 8 , and the shape and size of the depression 1060 can be adjusted as required.
  • the transition member 106 includes the extension portion 106b
  • the recess 1060 and the extension portion 106b are respectively disposed at opposite ends of the main body portion 106a. That is, an extension portion 106b is provided at one end of the main body portion 106a, and a recess 1060 is provided at the other end of the main body portion 106a.
  • one end of the main body 106a on which the extension 106b is disposed is the first end
  • one end of the main body 106a on which the recess 1060 is disposed is the second end
  • the first end and the second end are opposite ends of the conversion element.
  • the axis A0 of the conversion part and the axis C0 of the packing pack assembly may coincide, but it is not limited thereto.
  • the liquid end includes a valve box 101 , a plunger 102 , a packing package assembly 103 , and a packing pressure cap 104 .
  • the function of the packing pressure cap 104 is as described above, and will not be repeated here.
  • a transition piece 106 is provided between the valve box 101 and the packing pressure cap 104 .
  • the transition piece 106 is disposed between the inner wall of the packing chamber of the valve box 101 and the packing pressure cap 104 to connect the valve box 101 and the packing pressure cap 104 .
  • the transition piece 106 is disposed at the connection position between the valve box 101 and the packing pressure cap 104 .
  • the fluid end provided by the present disclosure makes the valve box less likely to be damaged by adding a conversion piece 106, so that the fluid end can be used for a long time without maintenance, and the production efficiency of the operation is improved.
  • adding a conversion piece 106 at the packing cavity 108 can isolate the thread of the packing gland 106 from the connecting thread of the valve box 101, preventing the risk of snapping during later operation and improving work efficiency.
  • the conversion part 106 can be removed and replaced with a new conversion part, which avoids damage to the valve box and saves operating costs.
  • FIG. 7 shows a plunger cavity 109 for accommodating the plunger 102 (as shown in FIG. 9 ), the plunger 102 being located in the plunger cavity 109 .
  • valve box 101 shown in FIG. 7 and FIG. 9 is made of stainless steel.
  • the embodiment of the present disclosure is described by taking the material of the valve box 101 as stainless steel as an example.
  • the conversion member 106 is made of the same material as the valve box 101 .
  • the threads between the valve box 101 and the packing pressure cap 104 are separated, so as to avoid buckling phenomenon.
  • the material of the conversion member 106 is different from that of the valve box 101 , and the thread between the stainless steel valve box 101 and the packing cap 104 can be separated by switching the material of the threaded connection position to avoid buckling.
  • the material of the transition member 106 and the material of the valve box 101 are selected from existing materials.
  • the transition member 106 is a ring-shaped structural member.
  • the conversion piece 106 includes external threads 1061 for threaded connection with the valve box 101
  • the conversion piece 106 includes internal threads 1062 for threaded connection with the packing pressure cap 104 .
  • two elements of a threaded connection are in contact with each other.
  • the outer circle of the transition piece 106 is threaded for threaded connection with the valve box 101
  • the inner circle of the transition piece 106 is also threaded for threaded connection with the packing gland 104 Connected by thread.
  • the outer end surface of the transition piece 106 can be welded together with the valve box 101 by welding.
  • FIG. 7 shows the weld groove 107 .
  • the end of the conversion member 106 away from the packing pack assembly 104 is flush with the end surface 1010 of the valve box 101 .
  • the hardness of the transition piece 106 is greater than that of the valve box 101 .
  • the material of the conversion element 106 includes metal or alloy material.
  • the thermal conductivity of the transition member 106 is greater than the thermal conductivity of the valve box 101 . That is, the conversion member 106 has better thermal conductivity than the valve box 101 .
  • the material of the conversion element 106 includes tungsten carbide or 440C stainless steel, but is not limited thereto.
  • the outer end surface of the conversion piece 106 and the valve box 101 can also be welded together by welding.
  • Fig. 10 is a schematic perspective view of a conversion element provided by another embodiment of the present disclosure. Compared with the conversion member 106 shown in FIG. 8 , the conversion member 106 shown in FIG. 10 is not provided with an extension portion 106 b , and the rest can refer to the conversion member 106 shown in FIG. 8 .
  • At least one embodiment of the present disclosure also provides a plunger pump, including any fluid end described above.
  • the plunger pump is used to pressurize the liquid at a first pressure to a liquid at a second pressure, the second pressure being greater than the first pressure.
  • the aforementioned fluids include fracturing fluids, but are not limited thereto.
  • the packing pack assembly, fluid end and plunger pump provided by the embodiments of the present disclosure can be used as oil field fracturing equipment for oil extraction.
  • the packing package assembly 103 in the liquid end or plunger pump shown in FIG. 9 may also adopt the packing package assembly 203 provided by the embodiment of the present disclosure. That is, the packing package assembly 103 in the fluid end or plunger pump shown in FIG. As a result, the packing package assembly 203 can refer to the above description, and will not be repeated here.

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Abstract

提供一种盘根包组件、液力端和柱塞泵。该盘根包组件包括：隔环；压环，所述压环和所述隔环沿所述盘根包组件的轴线的延伸方向排列；以及密封组件，位于所述隔环和所述压环之间；所述密封组件包括第一盘根环，所述第一盘根环与所述隔环至少部分接触，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之一包括凸部，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之另一包括凹部，所述凸部至少部分位于所述凹部之中。该盘根包组件、液力端和柱塞泵耐磨损。

Description

一种盘根包组件、液力端和柱塞泵
相关申请的交叉引用
出于所有目的，本申请要求于2021年09月24日递交的中国专利申请第202122318121.9号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开至少一实施例涉及一种盘根包组件、液力端和柱塞泵。
背景技术
水力压裂施工逐渐成为油田的主要增产措施，其在高压力作用下将压裂液(包括携砂液)泵送到井底，实现压裂作业，从而增加油气产量。该施工方式的关键组成部分是产生高压力的压裂液的柱塞泵。
例如，柱塞泵主要由动力端和液力端两部分组成。
发明内容
本公开的至少一实施例涉及一种盘根包组件、液力端和柱塞泵，本公开的至少一实施例还涉及一种转换件、液力端和柱塞泵。
一方面，本公开的至少一实施例涉及一种盘根包组件、液力端和柱塞泵，以耐磨损。
本公开的至少一实施例提供一种盘根包组件，包括：隔环；压环，所述压环和所述隔环沿所述盘根包组件的轴线的延伸方向排列；以及密封组件，位于所述隔环和所述压环之间；所述密封组件包括第一盘根环，所述第一盘根环与所述隔环至少部分接触，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之一包括凸部，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之另一包括凹部，所述凸部至少部分位于所述凹部之中。
例如，所述凸部和所述凹部至少部分接触。
例如，所述第一盘根环与所述隔环的接触面在通过所述轴线的平面内的截面包括V形、弧形、波浪形、和锯齿形至少之一。
例如，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之一包括多个凹部，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之另一包括多个凸部，所述多个凹部和所述多个凸部匹配。
例如，所述隔环的与所述第一盘根环接触的表面的相对的表面具有密封槽，所述密封槽内设有密封圈。
例如，所述密封组件还包括两个第二盘根环，且所述压环、所述两个第二盘根环、所述第一盘根环、以及所述隔环沿所述盘根包组件的所述轴线的延伸向排列。
例如，所述第一盘根环和与其相邻的第二盘根环的接触面、所述两个第二盘根环的接触面、所述压环和与其相邻的第二盘根环的接触面在通过所述轴线的平面内的截面包括V形、弧形、波浪形、和锯齿形至少之一。
本公开至少一实施例还提供一种液力端，包括上述任一盘根包组件。
例如，液力端还包括：阀箱，包括盘根腔，所述盘根腔被配置为容纳所述盘根包组件；盘根压帽，被配置为压紧所述盘根包组件，以及转换件，设置在所述阀箱和所述盘根压帽之间，被配置为连接所述阀箱和所述盘根压帽，所述转换件的材质与所述阀箱的材质不同。
例如，所述转换件的硬度大于所述阀箱的硬度。
例如，所述转换件的外端面通过焊接的方式与所述阀箱固定连接。
例如，所述转换件的外端面与所述阀箱的端面齐平。
例如，所述转换件包括内螺纹和外螺纹，所述转换件与所述阀箱通过螺纹连接，所述转换件与所述盘根压帽通过螺纹连接。
例如，所述转换件包括主体部和位于所述主体部的第一端的延伸部，所述延伸部朝向所述转换件的轴线凸出于所述主体部。
例如，所述转换件还包括位于所述主体部的第二端的多个凹陷，所述第一端和所述第二端为所述转换件的相对的两端，所述多个凹陷均匀分散布置。
本公开至少一实施例还提供一种柱塞泵，包括上述任一液力端。
另一方面，本公开的至少一实施例涉及一种转换件、液力端和柱塞泵，以防止阀箱和盘根压帽因螺纹粘合咬扣而无法使用的情况。
本公开至少一实施例提供一种转换件，所述转换件为筒形且包括从所述转换件的第一端延伸至所述转换件的第二端的通道，所述第一端和所述第二 端为所述转换件的相对的两端，所述转换件包括主体部，所述主体部的内表面包括内螺纹，所述主体部的外表面包括外螺纹。
例如，所述转换件还包括位于所述主体部的所述第一端的延伸部，所述延伸部朝向所述转换件的轴线凸出于所述主体部。
例如，所述延伸部在所述转换件的径向上的尺寸大于所述主体部在所述转换件的径向上的尺寸，并小于所述主体部在所述转换件的径向上的尺寸的两倍。
例如，所述转换件还包括位于所述主体部的所述第二端的多个凹陷，所述多个凹陷均匀分散布置。
本公开至少一实施例提供一种液力端，包括：阀箱，包括盘根腔；盘根包组件，位于所述盘根腔中；盘根压帽，至少部分位于所述盘根腔中并被配置为朝向所述阀箱内部压紧所述盘根包组件，以及转换件，设置在所述阀箱的盘根腔的内壁和所述盘根压帽之间，以将所述阀箱和所述盘根压帽连接，所述转换件为筒形且包括从所述转换件的第一端延伸至所述转换件的第二端的通道，所述转换件包括主体部，所述主体部的内表面包括内螺纹，所述主体部的外表面包括外螺纹，所述转换件的材质与所述阀箱的材质不同。
例如，所述阀箱的材质包括不锈钢。
例如，所述转换件的硬度大于所述阀箱的硬度。
例如，所述转换件的导热率大于所述阀箱的导热率。
例如，所述转换件的外端面通过焊接的方式与所述阀箱固定连接。
例如，所述转换件的外端面与所述阀箱的端面齐平。
例如，所述转换件为圆环形结构件。
例如，所述转换件包括主体部和位于所述主体部的第一端的延伸部，所述延伸部朝向所述转换件的轴线凸出于所述主体部。
例如，所述转换件还包括位于所述主体部的第二端的多个凹陷，所述第一端和所述第二端为所述转换件的相对的两端，所述多个凹陷均匀分散布置。
例如，所述转换件与所述阀箱通过所述外螺纹连接，所述转换件与所述盘根压帽通过所述内螺纹连接。
例如，液力端还包括柱塞，所述阀箱还包括柱塞腔，所述柱塞设置在所述柱塞腔中。
本公开至少一实施例还提供一种柱塞泵，包括上述任一液力端。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1为一种液力端的示意图。
图2为图1中的液力端的盘根包组件的示意图。
图3为本公开一实施例提供的盘根包组件的示意图。
图4为本公开一实施例提供的含有图3所示的盘根包组件的液力端的示意图。
图5为本公开另一实施例提供的盘根包组件的示意图。
图6为本公开一实施例提供的含有图5所示的盘根包组件的液力端的示意图。
图7为本公开一实施例提供的一种液力端的局部示意图。
图8为本公开一实施例提供的一种转换件的立体示意图。
图9为本公开一实施例提供的一种液力端的局部示意图。
图10为本公开另一实施例提供的一种转换件的立体示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语包括物理的或者机械的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表 示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
一方面，本公开针对阀箱101和盘根包组件103容易被磨损的问题，提供一种耐磨损盘根包组件、含有该盘根包组件的液力端，以及含有该液力端的柱塞泵。
图1为一种液力端的局部示意图。如图1所示，液力端包括阀箱101、柱塞102、盘根包组件103、以及盘根压帽104。例如，阀箱101的材料包括不锈钢。盘根压帽104为液力端中的重要部件，主要作用是通过螺纹结构，将盘根包组件103压紧在阀箱101的盘根腔中，当柱塞102快速往复运动时，能够实现柱塞处高压液力的密封。例如，柱塞102可以在柱塞腔内往复运动，以使得柱塞泵的液力端吸入低压液体，排出高压液体。例如，盘根包组件103位于盘根腔中。例如，盘根腔被配置为容纳盘根包组件。例如，盘根压帽104至少部分位于盘根腔中并被配置为朝向阀箱101内部压紧盘根包组件103。
在作业过程中，动力端中的曲柄连杆机构带动液力端中的柱塞进行往复运动，盘根压帽104可以将液力端中的盘根包组件103(盘根密封组件)锁紧，当柱塞不断往复运动时，可以实现柱塞处高压流体的密封。
图2为图1中的液力端的盘根包组件的示意图。例如，如图1和图2所示，盘根包组件103包括密封组件1031、隔环1032、以及压环1033。例如，如图2所示，压环1033和隔环1032沿盘根包组件的轴线C0的延伸方向排列。
例如，如图2所示，密封组件1031包括第一盘根环1031a和第二盘根环1031b。图2以密封组件1031包括一个第一盘根环1031a和两个第二盘根环1031b为例进行说明。例如，第一盘根环1031a的硬度小于第二盘根环1031b的硬度。例如，第一盘根环1031a为软盘根环，第二盘根环1031b为硬盘根环。例如，第一盘根环1031a的材料包括橡胶。例如，第二盘根环1031b的材料包括含有纤维的橡胶。例如，第二盘根环1031b包括夹布橡胶。第一盘根环1031a的材料和第二盘根环1031b的材料不限于以上例举，可以根据需要而定。
如图1和图2所示，盘根包组件103安装在阀箱101的盘根腔中，柱塞设置在阀箱101的柱塞腔中，在作业过程中，柱塞102会快速进行往复运动，腔体内产生交变载荷，盘根压帽104的表面为螺纹结构，通过螺纹旋紧将盘 根包组件103压紧在阀箱101的盘根腔内，对柱塞处的高压液体进行密封，防止泄露。
然而，上述盘根包组件103在使用时，有以下缺点或不足：如图1和图2所示，由于是压裂作业，阀箱101的腔体内为携砂压裂液，作业过程中，压裂砂会通过阀箱101与隔环1032之间的间隙、隔环1032与第一盘根环1031a(软盘根环)之间的间隙进入到盘根包组件103与阀箱101之间的缝隙中，由于阀箱101的腔体内不断的快速产生交变载荷，盘根包组件103也会不断的左右移动，盘根包组件103使用一段时间后就会产生磨损而无法使用，需要更换盘根包103。多次更换盘根包103后，由于磨损，使得阀箱101的内壁会出现严重的凹陷，该情况下，即使更换新的盘根包组件也无法良好密封阀箱内的高压液体，而导致无法使用。
图3为本公开一实施例提供的盘根包组件的示意图。图4为本公开一实施例提供的含有图3所示的盘根包组件的液力端的示意图。
如图3和图4所示，盘根包组件203包括密封组件2031、隔环2032、以及压环2033。例如，如图3和图4所示，压环2033和隔环2032沿盘根包组件203的轴线C0的延伸方向排列。例如，如图3和图4所示，密封组件2031包括第一盘根环2031a。例如，第一盘根环2031a与隔环2032相邻。例如，元件A和元件B相邻是指该元件A和元件B之间不设置其他的元件A且不设置其他的元件B。例如，第一盘根环2031a与隔环2032至少部分接触。为了使得盘根包组件和含有该盘根包组件的液力端耐磨损，第一盘根环2031a与隔环2032的接触面为V形，形成耐磨损盘根包组件和耐磨损液力端。
如图3和图4所示，第一盘根环2031a的与隔环2032接触的表面为V形，隔环2032的与第一盘根环2031a接触的表面为V形，第一盘根环2031a与隔环2032的接触面为V形，可以增大接触面积，以防止作业过程中，液体中的压裂砂进入到阀箱101与盘根包组件103之间的缝隙中，避免长时间使用磨损阀箱101及盘根包组件103，延长使用寿命。阀箱101及盘根包组件203的使用寿命延长，可以减少现场维护保养的次数，提高作业效率，对设备的安全稳定运行有重要作用。
例如，如图4所示，隔环2032起到在第一方向X上分隔密封组件2031和阀箱101的作用，压环2033起到压紧密封组件2031的作用。例如，隔环2032和压环2033可采用金属或塑料材料制作。例如，金属包括铜，塑料包括 聚醚醚酮(PEEK)，但不限于此，隔环2032和压环2033可以根据需要选择适合的材料。
例如，如图3和图4所示，为了防止作业过程中，液体中压裂砂进入到阀箱101与盘根包组件103之间的缝隙中，隔环2032的与第一盘根环2031a接触的表面的相对的表面具有密封槽(凹槽)320，密封槽320内设有密封圈121。密封圈121设置在隔环2032的密封槽320内，避免压裂砂进入到阀箱101与盘根包组件103之间的缝隙中而磨损阀箱101及盘根包组件103，延长使用寿命，减少现场维护保养的次数，提高作业效率，利于设备的安全稳定运行。
例如，如图3和图4所示，为了防止作业过程中，液体中压裂砂进入到阀箱101与盘根包组件103之间的缝隙中磨损阀箱101及盘根包组件103，密封组件2031还包括第二盘根环2031b。图2以密封组件2031包括一个第一盘根环2031a和两个第二盘根环2031b为例进行说明。例如，第一盘根环2031a的硬度小于第二盘根环2031b的硬度。例如，第一盘根环2031a为软盘根环，第二盘根环2031b为硬盘根环。
例如，在一些实施例中，第一盘根环2031a和与其相邻的第二盘根环2031b的接触面、两个第二盘根环2031b的接触面、压环2033和与其相邻的第二盘根环2031b的接触面在通过轴线C0的平面内的截面包括V形、弧形、波浪形、和锯齿形至少之一。对于上述接触面的形状不限于上述给出的情形，只要能增加接触面的面积的形状即可。
例如，如图3和图4所示，为了防止作业过程中，液体中压裂砂进入到阀箱101与盘根包组件103之间的缝隙中磨损阀箱101及盘根包组件103，第一盘根环2031a与第二盘根环2031b的接触面为V形，当然，也可以采用其他可以增大接触面的形状。
例如，如图3和图4所示，为了防止作业过程中，液体中压裂砂进入到阀箱101与盘根包组件103之间的缝隙中磨损阀箱101及盘根包组件103，两个第二盘根环2031b的接触面为V形，当然，也可以采用其他可以增大接触面的形状。
例如，如图3和图4所示，为了防止作业过程中，液体中压裂砂进入到阀箱101与盘根包组件103之间的缝隙中磨损阀箱101及盘根包组件103，压环203与第二盘根环2031b的接触面为V形，当然，也可以采用其他可以增 大接触面的形状。
例如，在使用时，先将密封圈121装入隔环2032的密封槽320中，再将带有密封圈121的隔环2032装入阀箱101的盘根腔中，再依次装入一个第一盘根环2031a、一个第二盘根环2031b、另一个第二盘根环2031b、以及压环2033，最后用盘根压帽104将整个盘根包组件103压紧在盘根腔中，再安装柱塞102，使柱塞102往复运动时能够密封内部高压液体。
图5为本公开另一实施例提供的盘根包组件的示意图。图6为本公开一实施例提供的含有图5所示的盘根包组件的液力端的示意图。图5所示的盘根包组件203与图3所示的盘根包组件203的区别在于：第一盘根环2031a与隔环2032的接触面为锯齿形，并且，图5所示的盘根包组件203中的隔环2032没有设置密封槽，该情况下，如图6所示，可以将密封槽320设置在阀箱101中。
图3至图6示出了第一方向X和第二方向Y。第一方向X垂直于第二方向Y。第一方向X可为轴向方向，第二方向Y可为径向方向。
如图3至图6所示，第一盘根环2031a的靠近隔环2032的表面S1和隔环2032的靠近第一盘根环2031a的表面S2之一包括凸部PT1，第一盘根环2031a的靠近隔环2032的表面S1和隔环2032的靠近第一盘根环2031a的表面S2之另一包括凹部PT2，凸部PT1至少部分位于凹部PT2之中，从而，与第一盘根环与隔环的接触面为平面的情况相比，使得盘根包组件203左右移动时，即使第一盘根环2031a和隔环2032稍有分离，第一盘根环2031a和隔环2032还是处于接触的状态，进而，避免作业过程中，液体中压裂砂进入到阀箱101与盘根包组件103之间的缝隙中磨损阀箱101及盘根包组件103。盘根包组件203的轴线C0沿第一方向X延伸。例如，在第一盘根环2031a和隔环2032的间隔小于第一盘根环2031a和隔环2032的接触面的沿盘根包组件203的轴线C0的延伸方向上的最大尺寸的前提下，都可以起到避免液体中压裂砂进入到阀箱101与盘根包组件103之间的缝隙中的作用。在第一盘根环2031a和隔环2032有间隔的情况下，第一盘根环2031a的靠近隔环2032的表面S1和隔环2032的靠近第一盘根环2031a的表面S2并不是如图3所示的完全接触，而是在凸部PT1的顶端和凹部PT2的底端之间有一定的间隔，但凸部PT1的顶端的两侧和凹部PT2的底端的两侧是接触的。即，在柱塞运动的过程中，第一盘根环2031a的靠近隔环2032的表面S1和隔环2032的靠近 第一盘根环2031a的表面S2至少部分接触。
例如，如图3至图6所示，凸部PT1和凹部PT2匹配。
例如，如图5和图6所示，第一盘根环2031a的靠近隔环2032的表面S1和隔环2032的靠近第一盘根环2031a的表面S2之一包括多个凸部PT1，第一盘根环2031a的靠近隔环2032的表面S1和隔环2032的靠近第一盘根环2031a的表面S2之另一包括多个凹部PT2，多个凸部PT1和多个凹部PT2匹配。例如，在第一盘根环2031a和隔环2032接触面为锯齿形的情况下，包括多个凸部PT1和多个凹部PT2。
例如，如图3至图6所示，盘根包组件203的轴线C0可以与柱塞102的轴线重合。例如，例如，盘根包组件203的轴线C0可以与柱塞腔的轴线重合。
例如，如图3至图6所示，盘根包组件203的轴线C0可为盘根包组件203的中心线C0。
例如，如图3至图6所示，盘根包组件203的中心线C0可以为盘根包组件203中的至少两个元件的中心的连线。盘根包组件203中各个元件均为环形。例如，盘根包组件203中每个元件的中心为该元件的圆心。
如图3至图6所示，第一盘根环2031a和隔环2032的接触面不为平面。例如，在本公开的实施例中，第一盘根环2031a和隔环2032的接触面为两者完全接触时的接触面。
如图3至图6所示，第一盘根环2031a与隔环2032的接触面在通过轴线C0的平面内的截面包括V形、弧形、波浪形、和锯齿形至少之一。
如图3至图6所示，第一盘根环2031a与隔环2032的接触面的在通过轴线C0的平面内的截面内的长度大于第一盘根环2031a与隔环2032的接触面的在盘根包组件203的径向上的长度。
例如，本公开的实施例提供的盘根包组件中，接触面为弧形的情况下，弧形可具有较大的弧度，以获得较大的接触面积。例如，弧形的圆心角大于或等于60度，小于或等于180度，但不限于此。
例如，如图4和图9所示，通过轴线C0的平面包括第一方向X和第二方向Y所在的平面，可以为纸面所在的平面。
如图3至图6所示，第一盘根环2031a和隔环2032在第一方向X上排列。如图3至图6所示，压环2033、两个第二盘根环2031b、第一盘根环2031a、隔环2032在第一方向X上依次排列。
例如，如图6所示，密封槽320设置在阀箱101中。与图3和图4所示的密封槽320设置在隔环2032中的情况相比，密封槽320设置在阀箱101中利于对阀箱101的保护。
本公开至少一实施例还提供一种液力端，包括上述任一盘根包组件。
本公开至少一实施例还提供一种柱塞泵，包括上述任一液力端。
另一方面，本公开针对阀箱101和盘根压帽104的咬扣问题，对柱塞泵的液力端做了改进。
随着作业工况越来越恶劣，为了延长液力端中的阀箱的使用寿命，行业内普遍将阀箱的材质由碳钢更换为不锈钢，不锈钢材质合金含量较高，综合性能好，可以满足现场恶劣的作业工况，很大程度提高设备的使用寿命。
随着全球能源供应结构的变化，页岩气和致密油等非常规能源逐渐发挥越来越重要的作用，因此对压裂施工方式提出了更高的要求。随着非常规能源的大范围开采，压裂作业的压力更高、作业时间更长，这些都会加速柱塞泵的损坏，特别是作为液力端核心部件的阀箱，在高压力作用下发生疲劳失效和磨损。在油田现场使用过程中，对液力端进行维保或更换不仅会浪费大量的人力和物力，还会影响作业效率。
然而，上述盘根压帽104在拆装时，由于不锈钢材质的阀箱101合金含量高，材质相对较软，盘根压帽104上的螺纹很容易与不锈钢材质的阀箱101上的螺纹粘连，从而发生咬扣的情况。而且，柱塞泵的液力端含有大量的压裂砂，使用时盘根包组件103也会产生大量的碎屑或杂质，这些压裂砂和杂质一旦进入到盘根压帽与不锈钢材质的阀箱101之间的螺纹中，将会大大增加咬扣的风险。含有不锈钢材质的阀箱101的液力端容易出现咬扣的问题。例如，在图1所示的液力端中，不锈钢材质的阀箱101发生咬扣后，螺纹损坏后导致阀箱101无法继续使用，损坏严重的甚至无法修复。通常，出现咬扣问题后盘根压帽104无法拆卸，只能将整个液力端全部更换，不仅影响现场的作业效率，而且浪费人力物力。
例如，不锈钢材质的阀箱101咬扣的原因如下：盘根压帽104在旋转过程中因摩擦产生热量，不锈钢的导热率相对较低(10-30w/m·℃，约为碳钢的1/3)，当产生的压力与热量破坏氧化铬层时，使得螺纹牙直接发生阻塞/剪切，由于不锈钢特性较软，进而发生粘着的现象。
图7为本公开一实施例提供的一种液力端的局部示意图。图8为本公开 一实施例提供的一种转换件的立体示意图。图9为本公开一实施例提供的一种液力端的局部示意图。
如图8所示，本公开一实施例提供一种转换件106，转换件106为筒形，转换件106的内表面包括内螺纹1062，转换件106的外表面包括外螺纹1061。
如图7至图9所示，本公开一实施例提供一种转换件，转换件106为筒形，转换件106包括主体部106a。例如，如图7和图8所示，转换件106为筒形且包括从转换件的第一端E1延伸至转换件的第二端E2的通道160，主体部106a的内表面包括内螺纹，主体部106a的外表面包括外螺纹。
如图8所示，转换件106的主体部106a的内表面包括内螺纹1062，转换件106的主体部106a的外表面包括外螺纹1061，以利于转换件106与其他部件的连接。
如图7至图9所示，转换件106还包括位于主体部106a的一端的延伸部106b，延伸部106b向内凸出，即，延伸部106b朝向转换件106的轴线A0凸出于主体部106a。如图7至图9所示，主体部106a为两端开口的筒形。
例如，如图7至图9所示，转换件106的在通过转换件106的轴线的平面内的截面为L型。例如，主体部106a和延伸部106b为一体结构，一体成型。如图9所示，转换件106中的延伸部106b可以起到压紧压环1033的目的。当然，在其他的实施例中，转换件106也可以不设置延伸部106b。
例如，如图7至图9所示，为了较好的起到转换和压紧压环的作用，延伸部106b在转换件的径向上的尺寸大于主体部106a在转换件的径向上的尺寸，并小于主体部106a在转换件的径向上的尺寸的两倍。例如，转换件的径向为其直径的方向。
如图8所示，转换件106的一端设有凹陷1060。在拆卸转换件106时，凹陷1060的设置利于转换件106通过拆卸工具进行拆卸。例如，拆卸工具上设有与凹陷1060对应的凸起。
如图8所示，转换件106的一端设有多个凹陷1060。例如，多个凹陷1060可以在主体部106a的一端均匀分散布置，以利于转换件106的拆卸。
需要说明的是，凹陷1060的形状和尺寸不限于图8所示，可以根据需要调整凹陷1060的形状和尺寸。
例如，在转换件106包括延伸部106b的情况下，凹陷1060和延伸部106b分设在主体部106a的相对的两端。即，主体部106a的一端设置延伸部106b， 主体部106a的另一端设置凹陷1060。例如，主体部106a的设置延伸部106b的一端为第一端，主体部106a的设置凹陷1060的一端为第二端，第一端和第二端为转换件的相对的两端。
例如，在转换件和盘根包组件安装完成后，转换件的轴线A0和盘根包组件的轴线C0可以重合，但不限于此。
如图7至图9所示，液力端包括阀箱101、柱塞102、盘根包组件103、以及盘根压帽104。盘根压帽104的作用如上所述，在此不再赘述。如图7和图9所示，在阀箱101和盘根压帽104之间设有转换件106。例如，转换件106设置在阀箱101的盘根腔的内壁和盘根压帽104之间，以将阀箱101和盘根压帽104连接。例如，如图7和图9所示，转换件106设置在阀箱101和盘根压帽104的连接位置处。通过设置转换件106，避免后期使用过程出现如图1所示的液力端中阀箱101和盘根压帽104因螺纹粘合咬扣而无法使用的情况。
本公开提供的液力端，考虑到阀箱损坏的原因和形式，通过增设转换件106，使得阀箱不易被损坏，使液力端能够长时间使用而不用维护，提高作业生产效率。
例如，在盘根腔108(如图7所示)处增加转换件106，可以将盘根压帽106的螺纹与阀箱101的连接螺纹隔离，防止后期作业使用时发生咬扣的风险，提高作业效率。
在本公开提供的液力端中，增加转换件106后，如果后期作业出现螺纹损坏，可以将转换件106加工去除后更换一个新的转换件，避免了阀箱的损坏，节约了作业成本。
图7示出了柱塞腔109，用以容纳柱塞102(如图9所示)，柱塞102位于柱塞腔109中。
例如，图7和图9所示的阀箱101的材质包括不锈钢。本公开的实施例以阀箱101的材质为不锈钢为例进行说明。
例如，在一些实施例中，转换件106的材质与阀箱101的材质相同。通过设置转换件106，将阀箱101与盘根压帽104之间的螺纹隔开，避免产生咬扣现象。
例如，转换件106的材质与阀箱101的材质不同，通过螺纹连接位置材质的转换，可以将不锈钢材质的阀箱101与盘根压帽104之间的螺纹隔开， 避免产生咬扣现象。
在本公开的实施例中，转换件106的材质以及阀箱101的材质均从已有材料中选取。
例如，如图7至图9所示，转换件106为圆环形结构件。例如，如图7至图9所示，转换件106包括外螺纹1061，用以与阀箱101通过螺纹连接，转换件106包括内螺纹1062，用以与盘根压帽104通过螺纹连接。在本公开提供的液力端中，螺纹连接的两个元件彼此相接触。
例如，如图7至图9所示，转换件106的外圆为螺纹结构，用以与阀箱101通过螺纹连接，转换件106的内圆也为螺纹结构，用以与盘根压帽104通过螺纹连接。
例如，如图7和图9所示，为了便于转换件106与阀箱101的牢固连接，转换件106的外端面可以用焊接的方式与阀箱101焊接在一起。图7示出了焊接坡口107。
例如，如图9所示，为了利于焊接操作，转换件106的远离盘根包组件104的一端与阀箱101的端面1010齐平。
例如，转换件106的硬度比阀箱101的硬度大。例如，转换件106的材质包括金属或合金材料。
例如，转换件106的导热率比阀箱101的导热率大。即，转换件106比阀箱101的导热性能更好。
例如，转换件106的材质包括碳化钨或440C不锈钢，但不限于此。
例如，如图7和图9所示，在安装时，首先将盘根包组件103放入阀箱101的盘根腔108内，将转换件106拧到不锈钢材质的阀箱101上，将盘根压帽104拧到转换件106上，将盘根包组件103压紧，最后再将柱塞102装入，使柱塞102往复运动时能够密封内部高压液体。
例如，在安装时，将转换件106拧到不锈钢材质的阀箱101上之后，还可以通过焊接的方式将转换件106的外端面与阀箱101焊接在一起。
图10为本公开另一实施例提供的一种转换件的立体示意图。图10所示的转换件106与图8所示的转换件106相比，没有设置延伸部106b，其余可参照图8所示的转换件106。
本公开至少一实施例还提供一种柱塞泵，包括上述任一液力端。柱塞泵用于将第一压力的液体增压为第二压力的液体，第二压力大于第一压力。例如， 上述液体包括压裂液，但不限于此。
例如，本公开的实施例提供的盘根包组件、液力端和柱塞泵可作为一种油田压裂设备，用于石油开采。
需要说明的是，图9所示的液力端或柱塞泵中的盘根包组件103也可以采用本公开的实施例提供的盘根包组件203。即，图9所示的液力端或柱塞泵中的盘根包组件103替换为本公开的实施例提供的盘根包组件203，以使得液力端或柱塞泵具有耐磨损的效果，盘根包组件203可参照如上描述，在此不再赘述。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (16)

  1. 一种盘根包组件，包括：
    隔环；
    压环，所述压环和所述隔环沿所述盘根包组件的轴线的延伸方向排列；以及
    密封组件，位于所述隔环和所述压环之间；
    其中，所述密封组件包括第一盘根环，所述第一盘根环与所述隔环至少部分接触，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之一包括凸部，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之另一包括凹部，所述凸部至少部分位于所述凹部之中。
  2. 根据权利要求1所述的盘根包组件，其中，所述凸部和所述凹部至少部分接触。
  3. 根据权利要求1或2所述的盘根包组件，其中，所述第一盘根环与所述隔环的接触面在通过所述轴线的平面内的截面包括V形、弧形、波浪形、和锯齿形至少之一。
  4. 根据权利要求1-3任一项所述的盘根包组件，其中，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之一包括多个凹部，所述第一盘根环的靠近所述隔环的表面和所述隔环的靠近所述第一盘根环的表面之另一包括多个凸部，所述多个凹部和所述多个凸部匹配。
  5. 根据权利要求1-4任一项所述的盘根包组件，其中，所述隔环的与所述第一盘根环接触的表面的相对的表面具有密封槽，所述密封槽内设有密封圈。
  6. 根据权利要求1-5任一项所述的盘根包组件，其中，所述密封组件还包括两个第二盘根环，且所述压环、所述两个第二盘根环、所述第一盘根环、以及所述隔环沿所述盘根包组件的所述轴线的延伸向排列。
  7. 根据权利要求6所述的盘根包组件，其中，所述第一盘根环和与其相邻的第二盘根环的接触面、所述两个第二盘根环的接触面、所述压环和与其相邻的第二盘根环的接触面在通过所述轴线的平面内的截面包括V形、弧形、波浪形、和锯齿形至少之一。
  8. 一种液力端，包括根据权利要求1-7任一项所述的盘根包组件。
  9. 根据权利要求8所述的液力端，其中，所述液力端还包括：
    阀箱，包括盘根腔，所述盘根腔被配置为容纳所述盘根包组件；
    盘根压帽，被配置为压紧所述盘根包组件，以及
    转换件，设置在所述阀箱和所述盘根压帽之间，被配置为连接所述阀箱和所述盘根压帽，
    其中，所述转换件的材质与所述阀箱的材质不同。
  10. 根据权利要求9所述的液力端，其中，所述转换件的硬度大于所述阀箱的硬度。
  11. 根据权利要求9或10所述的液力端，其中，所述转换件的外端面通过焊接的方式与所述阀箱固定连接。
  12. 根据权利要求11所述的液力端，其中，所述转换件的外端面与所述阀箱的端面齐平。
  13. 根据权利要求9-12任一项所述的液力端，其中，所述转换件包括内螺纹和外螺纹，所述转换件与所述阀箱通过螺纹连接，所述转换件与所述盘根压帽通过螺纹连接。
  14. 根据权利要求9-13任一项所述的液力端，其中，所述转换件包括主体部和位于所述主体部的第一端的延伸部，所述延伸部朝向所述转换件的轴线凸出于所述主体部。
  15. 根据权利要求14所述的液力端，其中，所述转换件还包括位于所述主体部的第二端的多个凹陷，所述第一端和所述第二端为所述转换件的相对的两端，所述多个凹陷均匀分散布置。
  16. 一种柱塞泵，包括根据权利要求8-15任一项所述的液力端。
PCT/CN2021/126681 2021-09-24 2021-10-27 一种盘根包组件、液力端和柱塞泵 WO2023045019A1 (zh)

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