A fracturing hose assembly and method of making the same

Abstract

The application relates to a fracturing hose assembly and a preparation method thereof, and relates to the technical field of hoses and hose connections. The fracturing hose assembly comprises a hose joint, a hose pipe body and a wear-resistant sleeve. The end of the hose pipe body is provided with a stripping section. The hose joint comprises a locking core and a sleeve assembly sleeved on the outer side of the locking core. The locking core is inserted into the inner cavity of the stripping section, the sleeve assembly is installed on the outer side of the stripping section, and the stripping section is clamped between the locking core and the sleeve assembly through the buckling deformation of the sleeve assembly. The outer surface of the locking core is provided with a plurality of first protrusions configured to be matched with the sleeve assembly to compress the stripping section into a curved locking structure when the sleeve assembly is buckled and deformed. The wear-resistant sleeve is installed in the inner cavities of the hose pipe body and the locking core, and the outer wall of the wear-resistant sleeve is tightly attached to the inner wall of the hose pipe body and the inner wall of the locking core. The technical scheme of the application comprehensively solves the technical problems of fast joint wear and easy seal failure.

Description

Technical Field

[0001] This application relates to the technical field of hoses and hose connections, and more particularly to a fracturing hose assembly and its manufacturing method. Background Technology

[0002] In oil and gas fracturing operations, fracturing hoses offer advantages over fracturing steel pipes, including longer service life, lower cost, and easier installation, making them a key component for high-pressure fluid transport and widely used in unconventional oil and gas development. With the increasing prevalence of high-pressure, long-cycle operations, higher demands are being placed on the wear resistance and sealing stability of fracturing hose assemblies.

[0003] Existing fracturing hose assemblies still have obvious technical defects: First, the metal parts of the joints wear out faster than the hose body, and the wear resistance is insufficient, which greatly shortens the overall service life; Second, the joint seal is located at the junction of the soft and hard parts of the fracturing hose assembly, which is a stress concentration area. High-frequency vibration during the fracturing process can easily cause seal failure and media leakage, leading to premature scrapping of the fracturing hose assembly.

[0004] Solving the problems of joint wear resistance and sealing failure in fracturing hose assemblies under actual working conditions is an urgent issue that technical personnel in the field need to address. Summary of the Invention

[0005] This application provides a fracturing hose assembly and its manufacturing method, which comprehensively solves the technical problems of rapid joint wear and easy seal failure.

[0006] In a first aspect, this application provides a fracturing hose assembly, comprising: a hose connector, a hose body, and a wear-resistant sleeve; the end of the hose body is provided with a stripping section; the hose connector includes a locking core with an inner cavity and a sleeve assembly fitted outside the locking core; the locking core is inserted into the inner cavity of the stripping section, the sleeve assembly is installed on the outer side of the stripping section, and the sleeve assembly is deformed by pressing to clamp the stripping section between the locking core and the sleeve assembly; the outer surface of the locking core is provided with a plurality of first protrusions, the first protrusions being configured to cooperate with the sleeve assembly when the sleeve assembly is deformed by pressing to compress the stripping section into a bent locking structure; the wear-resistant sleeve is installed in the inner cavity of the hose body and the inner cavity of the locking core, and the outer wall of the wear-resistant sleeve is tightly fitted with the inner wall of the hose body and the inner wall of the locking core, respectively.

[0007] In one possible implementation, the sleeve assembly includes a first sleeve and a second sleeve fitted around the outside of the first sleeve; the first sleeve is installed on the outside of the peeling section, and the inner wall of the first sleeve is provided with a second protrusion that mates with the first protrusion.

[0008] In one possible implementation, the hose connector further includes a positioning ring; the positioning ring is disposed between the locking core and the sleeve assembly for axial positioning.

[0009] In one possible implementation, the hose body comprises, from the inside out, an inner rubber layer, an inner fabric layer, a steel wire reinforcement layer, an outer fabric layer, and an outer rubber layer; the inner rubber layer, the inner fabric layer, the outer rubber layer, and the outer fabric layer corresponding to the peeling section are completely peeled off, exposing the steel wire reinforcement layer.

[0010] In one possible implementation, the peeling length of the inner adhesive layer matches the length of the locking section of the locking core, the locking section being the section on the locking core where the plurality of first protrusions are provided; the peeling length of the outer adhesive layer matches the length of the first sleeve.

[0011] In one possible implementation, the wear-resistant sleeve includes a wear-resistant layer and a warning layer; the warning layer is a layer structure with color markings.

[0012] In one possible implementation, the outer diameter of the first protrusion of the locking core is equal to the inner diameter of the peeling section; the inner diameter of the locking core is equal to the inner diameter of the hose body, and the outer diameter of the wear-resistant sleeve is equal to the inner diameter of both the locking core and the hose body.

[0013] Secondly, this application provides a method for preparing a fracturing hose assembly as described in any of the above claims, comprising: stripping the adhesive from the end of the hose body to form a stripped section; inserting a locking core of a hose connector into the inner cavity of the stripped section, and installing a sleeve assembly of the hose connector on the outer side of the stripped section; causing radial deformation of the sleeve assembly through a crimping process to clamp and fix the stripped section between the locking core and the sleeve assembly, and cooperating with a plurality of first protrusions on the outer surface of the locking core with the sleeve assembly to press the stripped section into a bent locking structure; installing a wear-resistant sleeve into the inner cavity of the hose body and the inner cavity of the locking core; and performing a secondary shaping treatment on the installed wear-resistant sleeve to ensure that the outer wall of the wear-resistant sleeve is tightly bonded to the inner wall of the hose body and the inner wall of the locking core, respectively.

[0014] In one possible implementation, the secondary shaping process of the installed wear-resistant sleeve specifically includes: connecting the plug plate to the end of the hose body; and injecting a heat medium into the wear-resistant sleeve through an injection hole provided on the plug plate.

[0015] In one possible implementation, before performing secondary shaping on the installed wear-resistant sleeve, the method further includes: trimming the ends of the wear-resistant sleeve so that the ends of the wear-resistant sleeve are flush with the end face of the locking core.

[0016] This application provides a fracturing hose assembly and its manufacturing method, which has the following advantages compared with the prior art: The technical solution of this application continuously installs a wear-resistant sleeve in the inner cavity of the hose body and the locking core, and makes the outer wall of the sleeve tightly fit with the inner wall of both, so that the high-pressure fluid medium directly contacts the inner wall of the wear-resistant sleeve, thereby avoiding the scouring and wear of the metal parts of the hose joint and the rubber layer inside the tube by the fluid, and significantly improving the overall wear resistance life of the assembly. At the same time, multiple first protrusions on the outer surface of the locking core cooperate with the sleeve assembly to press the peeling section into a bent locking structure by clamping. The first protrusions realize the dual functions of mechanical connection and high-pressure sealing between the hose joint and the hose body. This connection method without independent sealing section moves the sealing function forward to the connection end with the hose joint, reduces the sealing position, and reduces the risk of sealing failure due to high-frequency vibration, thereby comprehensively solving the technical problems of rapid joint wear and easy sealing failure. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 This is a schematic diagram of one embodiment of a fracturing hose assembly provided in this application; Figure 2 This is a schematic diagram of the hose body of one embodiment of a fracturing hose assembly provided in this application; Figure 3 This is a schematic diagram of the hose connector of one embodiment of a fracturing hose assembly provided in this application; Figure 4This is a schematic diagram of the structure of the first protrusion in one embodiment of a fracturing hose assembly provided in this application; Figure 5 This is a schematic diagram of the wear-resistant sleeve of one embodiment of a fracturing hose assembly provided in this application; Figure 6a This is a schematic diagram of the structure of a fracturing hose assembly provided in this application before trimming; Figure 6b This is a trimmed structural schematic diagram of one embodiment of a fracturing hose assembly provided in this application; Figure 7 This is a schematic diagram of the secondary shaping of an embodiment of the fracturing hose assembly provided in this application; Figure 8 This is a schematic flowchart of an embodiment of a method for preparing a fracturing hose assembly provided in this application.

[0021] Figure label: 1. Hose connector; 2. Hose body; 3. Wear-resistant sleeve; 21. Inner rubber layer; 22. Inner fabric layer; 23. Steel wire reinforcement layer; 24. Outer fabric layer; 25. Outer rubber layer; 11. Locking core; 111. First protrusion; 12. Positioning ring; 13. First sleeve; 14. Second sleeve; 31. Wear-resistant layer; 32. Warning layer; 4. Blocking plate; 41. Injection hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0024] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrases "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]." Example 1, see Figure 1 , Figure 1 This is a structural schematic diagram of one embodiment of a fracturing hose assembly provided in this application, as shown below. Figure 1 As shown, the fracturing hose assembly includes a hose connector 1, a hose body 2, and a wear-resistant sleeve 3, as detailed below: In one embodiment, the end of the hose body 2 is provided with a stripping section.

[0028] In one embodiment, the hose body 2 comprises, from the inside out, an inner rubber layer 21, an inner fabric layer 22, a steel wire reinforcement layer 23, an outer fabric layer 24, and an outer rubber layer 25; as shown Figure 2 As shown, Figure 2 This is a schematic diagram of the hose body of one embodiment of a fracturing hose assembly provided in this application.

[0029] In one embodiment, the inner adhesive layer 21, the inner fabric layer 22, the outer adhesive layer 25, and the outer fabric layer 24 corresponding to the peeling section are completely peeled off, exposing the steel wire reinforcement layer 23.

[0030] Preferably, the inner adhesive layer 21 and the outer adhesive layer 25 corresponding to the peeling section may be completely removed, exposing the inner fabric layer 22, the steel wire reinforcement layer 23 and the outer fabric layer 24; or, the inner adhesive layer 21, the inner fabric layer 22 and the outer adhesive layer 25 corresponding to the peeling section may be completely removed, exposing the steel wire reinforcement layer 23 and the outer fabric layer 24.

[0031] In one embodiment, the peeling length of the inner adhesive layer 21 is matched with the length of the locking section of the locking core 11, wherein the locking section is the section on the locking core 11 in which the plurality of first protrusions 111 are provided; the peeling length of the outer adhesive layer 25 is matched with the length of the first sleeve 13, which can ensure accurate clamping position and uniform force.

[0032] Preferably, the peeling length of the inner adhesive layer 21 is consistent with the length of the locking section of the locking core 11, and the peeling length of the outer adhesive layer 25 is consistent with the length of the first sleeve 13.

[0033] Specifically, before assembling and connecting the hose body 2 and the hose connector 1, the end of the hose body 2 is first stripped of its adhesive to form a stripped section, so that the steel wire reinforcement layer 23 is exposed, which facilitates reliable crimping with the hose connector 1.

[0034] like Figure 3 As shown, Figure 3 This is a schematic diagram of the hose connector structure of one embodiment of a fracturing hose assembly provided in this application, as shown below. Figure 4 As shown, Figure 4 This is a schematic diagram of the hose connector of one embodiment of a fracturing hose assembly provided in this application.

[0035] In one embodiment, the hose connector 1 includes a locking core 11 with an inner cavity and a sleeve assembly fitted onto the outside of the locking core 11; the locking core 11 is inserted into the inner cavity of the peeling section, the sleeve assembly is installed on the outside of the peeling section, and the sleeve assembly is deformed by pressing to clamp the peeling section between the locking core 11 and the sleeve assembly; the outer surface of the locking core 11 is provided with a plurality of first protrusions 111, the first protrusions 111 being configured to cooperate with the sleeve assembly when the sleeve assembly is deformed by pressing to compress the peeling section into a bent locking structure.

[0036] In one embodiment, the sleeve assembly includes a first sleeve 13 and a second sleeve 14 fitted around the outside of the first sleeve 13; the first sleeve 13 is installed on the outside of the peeling section, and the inner wall of the first sleeve 13 is provided with a second protrusion that cooperates with the first protrusion 111.

[0037] Specifically, the second sleeve 14 is used to reinforce the first sleeve 13 and improve the overall crimping strength.

[0038] Specifically, the locking core 11 has a through-cavity, and its outer surface is provided with a plurality of first protrusions 111 to form a locking section. Compared with conventional crimp connector cores which do not have a sealing section and rely solely on the first protrusions 111 to achieve a locking connection with the hose body 2, the length of the locking core 11 is shortened by 50% compared with conventional crimp connector cores due to the reduction in functionality, which can effectively reduce the weight of the hose assembly.

[0039] Preferably, the first protrusion 111 is a first trapezoidal protrusion, and the second protrusion is a second trapezoidal protrusion that cooperates with the first trapezoidal protrusion.

[0040] Preferably, the number of the first trapezoidal protrusions includes, but is not limited to, 2, 3 or 4.

[0041] Specifically, the first protrusion 111 and the second protrusion cooperate to compress the peeling section into a bending locking structure when it is pressed and deformed, that is, to compress the steel wire reinforcement layer 23 into a bending locking structure so as to firmly lock the steel wire reinforcement layer 23.

[0042] Preferably, the bending locking structure is a wave-shaped bending locking structure.

[0043] In one embodiment, the outer diameter of the first protrusion 111 of the locking core 11 is equal to the inner diameter of the stripping section, and the inner diameter of the locking core 11 is equal to the inner diameter of the hose body 2.

[0044] In one embodiment, the hose connector 1 further includes a positioning ring 12.

[0045] Specifically, the positioning ring 12 is disposed between the locking core 11 and the sleeve assembly for axial positioning to prevent positional displacement during assembly.

[0046] In one embodiment, the assembly process of the hose connector 1 and the hose body 2 is as follows: First, the end of the hose body 2 is stripped to a fixed length, removing the inner rubber layer 21, outer rubber layer 25, inner fabric layer 22, and outer fabric layer 24 respectively, exposing the steel wire reinforcement layer 23 to form a stripped section; then, the locking core 11 is inserted into the inner hole of the stripped section, and a positioning ring 12 is assembled on the outside of the locking core 11 to achieve axial positioning; subsequently, the first sleeve 13 is fitted onto the outside of the stripped section, and the first sleeve 13 is radially pressed by a crimping device to deform it and... The stripping section is clamped and fixed between the locking core 11 and the first sleeve 13. The first protrusion 111 on the locking core 11 and the second protrusion on the inner wall of the first sleeve 13 cooperate with each other to press the steel wire reinforcement layer 23 in the stripping section into a wave-shaped bending structure to achieve a firm lock. Then, the second sleeve 14 is fitted onto the outside of the first sleeve 13 that has been crimped. The second sleeve 14 is fixed to the outside of the first sleeve 13 by crimping deformation again, forming a reinforcement constraint on the first sleeve 13, thereby completing the overall crimping assembly of the hose connector 1 and the hose body 2.

[0047] In one embodiment, the wear-resistant sleeve 3 is installed in the inner cavity of the hose body 2 and the inner cavity of the locking core 11, and the outer wall of the wear-resistant sleeve 3 is tightly fitted with the inner wall of the hose body 2 and the inner wall of the locking core 11, respectively.

[0048] In one embodiment, the wear-resistant sleeve 3 is an integral continuous tubular structure, which is extruded from a wear-resistant polymer material.

[0049] Preferably, the wear-resistant polymer material includes, but is not limited to, ultra-high molecular weight polyethylene.

[0050] In one embodiment, the wear-resistant sleeve 3 includes a wear-resistant layer 31 and a warning layer 32; the warning layer 32 is a layer structure with color markings; such as Figure 5 As shown, Figure 5 This is a schematic diagram of the wear-resistant sleeve of one embodiment of a fracturing hose assembly provided in this application.

[0051] Preferably, the color indicator is red to visually indicate the wear status.

[0052] In one embodiment, the outer diameter of the wear-resistant sleeve 3 is equal to the inner diameter of the locking core 11 and the inner diameter of the hose body 2, which can ensure that the internal flow channel of the fracturing hose assembly is smooth, without steps or breaks, and reduce the resistance to medium flow.

[0053] Specifically, after the hose body 2 and hose connector 1 are crimped together, the wear-resistant sleeve 3 is continuously installed in the inner cavity of the hose body 2 and the inner cavity of the locking core 11. Its outer diameter is consistent with the inner diameter of the locking core 11 and the inner diameter of the hose body 2, so that the outer wall of the wear-resistant sleeve 3 is tightly fitted with the inner wall of the hose body 2 and the locking core 11, forming a continuous and uninterrupted wear-resistant surface that runs through the hose body and the connector. This fundamentally avoids the interruption gaps caused by separately setting wear-resistant layers on the connector and the hose body, and eliminates the easily worn weak areas.

[0054] In one embodiment, before installing the wear-resistant sleeve 3, the hose body 2 and the hose connector 1 are passivated. This process removes burrs, sharp edges, and oxide layers from the inner wall of the hose body 2 and the inner wall of the locking core 11, making the inner wall clean and moderately rough. This significantly improves the bonding strength and tightness between the wear-resistant sleeve 3 and the inner wall of the hose body 2 and the inner wall of the locking core 11, preventing the wear-resistant sleeve 3 from loosening, slipping, or partially detaching during use.

[0055] In one embodiment, the length of the wear-resistant sleeve 3 is greater than the total length of the inner cavity after the hose body and hose connector are crimped together. This allows for trimming allowance after the wear-resistant sleeve 3 is installed into the inner cavity of the hose body 2 and the inner cavity of the locking core 11, so that the end face of the wear-resistant sleeve 3 is flush with the end face of the locking core 11. Figure 6a As shown, Figure 6a This is a schematic diagram of the structure of a fracturing hose assembly provided in this application before trimming; as shown. Figure 6b As shown, Figure 6b This is a schematic diagram of the trimmed structure of one embodiment of a fracturing hose assembly provided in this application.

[0056] In one embodiment, after the wear-resistant sleeve 3 is trimmed, it undergoes a secondary shaping process to stimulate the adhesion of the hose body 2 and hose connector 1 to the wear-resistant sleeve 3.

[0057] Specifically, the secondary shaping process involves connecting the plug plate 4 to the end of the hose body 2, and injecting a heat medium into the wear-resistant sleeve through the injection hole 41 on the plug plate 4 for secondary shaping. This completes the secondary shaping of the wear-resistant sleeve 3, ensuring a tight bond between the wear-resistant sleeve 3 and the inner cavity of the hose body 2 and the inner cavity of the locking core 11, thereby improving the bonding stability and service life. Figure 7 As shown, Figure 7 This is a schematic diagram of the secondary shaping of an embodiment of a fracturing hose assembly provided in this application.

[0058] Preferably, the temperature of the injected heat medium is set to 100℃-200℃, the pressure is set to 0.5MPa-1MPa, and the heat and pressure holding time is set to 30-60 minutes.

[0059] Example 2, see Figure 2 , Figure 8 This is a schematic flowchart of an embodiment of a method for manufacturing a fracturing hose assembly provided in this application, as shown below. Figure 8 As shown, the preparation method of this fracturing hose assembly includes steps S1-S5, as follows: Step S1: Peel the adhesive from the end of the hose body to form a peeled section.

[0060] In one embodiment, the outer and inner layers of the hose body are peeled off sequentially according to a preset size. Based on the required mating length for assembly, the outer rubber layer, outer fabric layer, inner rubber layer, and inner fabric layer at the end of the hose body are peeled off to a fixed length, fully exposing the steel wire reinforcement layer in the corresponding area, forming a peeled section for mating with the hose connector.

[0061] In one embodiment, during the peeling process, the peeling length of the inner rubber layer and inner fabric layer corresponding to the peeling section is consistent with the length of the locking section on the locking core where the first protrusion is provided, and the peeling length of the outer rubber layer and outer fabric layer corresponding to the peeling section is consistent with the axial length of the first sleeve, ensuring that the peeling range completely corresponds to the locking area of ​​the hose connector and the crimping area of ​​the first sleeve.

[0062] Step S2: Insert the locking core of the hose connector into the inner cavity of the stripping section, and fit the sleeve assembly of the hose connector onto the outside of the stripping section.

[0063] In one embodiment, the sleeve assembly includes a first sleeve and a second sleeve fitted around the outside of the first sleeve; the first sleeve is installed on the outside of the peeling section, and the inner wall of the first sleeve is provided with a second protrusion that cooperates with the first protrusion.

[0064] In one embodiment, after the stripping section is processed, the locking core of the hose connector is slowly and smoothly inserted into the inner cavity of the stripping section at the end of the hose body along the axial direction, so that the outer wall of the locking core fits tightly with the inner wall of the stripping section, ensuring that the first protrusion on the locking core completely corresponds to the mating area of ​​the stripping section. After assembly, coaxial positioning is achieved, providing a stable internal foundation for subsequent clamping and locking.

[0065] In one embodiment, after the locking core is assembled, the first sleeve is axially fitted onto the outside of the stripping section of the hose body, so that the first sleeve covers the outside of the stripping section, and the second protrusion on the inner wall of the first sleeve and the first protrusion on the outer wall of the locking core form a radially corresponding mating position, so as to ensure that the two can accurately engage during subsequent crimping.

[0066] In one embodiment, after the first sleeve is installed in place, the second sleeve is then installed axially on the outside of the first sleeve, so that the second sleeve completely covers the outer wall of the first sleeve, forming a double-layer sleeve structure. During the installation process, the first sleeve, the second sleeve, the locking core, and the peeling section are axially aligned and radially centered, thus completing the overall pre-installation and positioning of the sleeve assembly.

[0067] Step S3: The sleeve assembly is radially deformed by a pressing process, the peeling section is clamped and fixed between the locking core and the sleeve assembly, and the multiple first protrusions on the outer surface of the locking core cooperate with the sleeve assembly to press the peeling section into a bent locking structure.

[0068] In one embodiment, after the sleeve assembly is assembled and positioned, a clamping device is used to apply a uniform radial clamping force to the first sleeve and the second sleeve, so that the sleeve assembly undergoes controllable radial plastic deformation under pressure, and the radial dimension shrinks inward, thereby tightly clamping and fixing the peeling section between the locking core and the sleeve assembly to form a stable clamping structure.

[0069] In one embodiment, during the clamping process, multiple first protrusions on the outer surface of the locking core form a mutually interlocking and radially corresponding fit with the second protrusions on the inner wall of the first sleeve as the clamping action is performed. Under the joint squeezing action of the inner and outer protrusions, the peeling section and the internal steel wire reinforcement layer are compressed and form a bent locking structure, which increases the interlocking area and pull-out resistance between the joint and the tube body.

[0070] In one embodiment, by step-by-step or synchronous crimping, the first sleeve is first deformed and locked, and then the second sleeve on the outside reinforces and constrains the first sleeve to prevent springback after crimping, ensuring the bending and locking structure is durable and reliable, and finally achieving a high-strength, non-loosening fixed connection between the hose connector and the hose body.

[0071] Step S4: Install the wear-resistant sleeve into the inner cavity of the hose body and the inner cavity of the locking core.

[0072] In one embodiment, before installing the wear-resistant sleeve into the inner cavity of the hose body and the inner cavity of the locking core, the method further includes: passivating the hose body and the hose connector.

[0073] Specifically, the passivation treatment is mainly carried out on the inner wall of the hose body and the inner wall of the locking core in the hose connector to remove impurities, foreign objects and processing residues from the inner wall surface.

[0074] Specifically, burrs, sharp edges, flash, and metal oxide layers on the inner wall of the hose and locking core are removed through physical or chemical passivation. This eliminates sharp edges and microscopic protrusions on the inner wall, preventing these defects from scratching or puncturing the wear-resistant sleeve during the push-and-installation process, and ensuring the structural integrity of the wear-resistant sleeve.

[0075] Specifically, the passivated inner wall surface can form a clean, uniform, and appropriately rough bonding base surface, which not only provides a flat installation mating surface for the wear-resistant sleeve, but also significantly enhances the bonding strength between the wear-resistant sleeve and the inner wall of the hose and the inner wall of the locking core in the subsequent secondary shaping process. This prevents the wear-resistant sleeve from loosening, slipping, or partially detaching under the impact of high-pressure fluid, thereby improving the overall service life of the assembly.

[0076] In one embodiment, the wear-resistant sleeve is an integral continuous tubular structure, which is extruded from a wear-resistant polymer material.

[0077] In one embodiment, after the hose connector and hose body are crimped together, the wear-resistant sleeve is slowly inserted axially from the end of the hose body, so that it passes through the inner cavity of the hose body and the inner cavity of the locking core in sequence, until the wear-resistant sleeve is completely laid in the entire internal flow channel.

[0078] In one embodiment, during the push-installation process, the wear-resistant sleeve is kept coaxial with the inner cavity of the tube body and the locking core to avoid tube wall scratches and sleeve wrinkles, so that the outer wall of the wear-resistant sleeve is initially in contact with the inner wall of the hose tube and the inner wall of the locking core, without lifting, offset, or gaps.

[0079] In one embodiment, after the wear-resistant sleeve is installed in place, the wear-resistant sleeve completely covers the inner wall of the hose body and the locking core, forming a continuous and integrated inner lining structure, providing a uniform and flat bonding base for subsequent secondary shaping processing.

[0080] Step S5: Perform a secondary shaping process on the installed wear-resistant sleeve to ensure that the outer wall of the wear-resistant sleeve is tightly bonded to the inner wall of the hose body and the inner wall of the locking core.

[0081] In one embodiment, the length of the wear-resistant sleeve is greater than the total length of the inner cavity after the hose body and hose connector are crimped together.

[0082] Specifically, an integral continuous tubular wear-resistant sleeve with a length greater than the total length of the inner cavity after the hose body and hose connector are crimped is used. This ensures that the wear-resistant sleeve can fully extend into and cover the entire inner wall of the hose body and locking core during installation, avoiding exposed areas at the end of the inner cavity due to dimensional deviations or installation errors. At the same time, it provides sufficient machining allowance for subsequent trimming processes, ensuring that the wear-resistant sleeve can completely cover the entire working flow channel.

[0083] In one embodiment, before performing secondary shaping on the installed wear-resistant sleeve, the method further includes: trimming the ends of the wear-resistant sleeve so that the ends of the wear-resistant sleeve are flush with the end face of the locking core.

[0084] Specifically, by pre-trimming the edges to ensure that the end dimensions are regular and the end faces are flush, the sealing effect can be avoided during the subsequent secondary shaping process due to the sleeve end being too long, skewed, or protruding. In one embodiment, the secondary shaping process of the installed wear-resistant sleeve specifically includes: connecting the plug plate to the end of the hose body; and injecting a heat medium into the wear-resistant sleeve through the injection hole provided on the plug plate.

[0085] Preferably, the temperature of the injected heat medium is set to 100℃-200℃, the pressure is set to 0.5MPa-1MPa, and the heat and pressure holding time is set to 30 minutes-60 minutes.

[0086] Specifically, the plugging plate is first sealed to the end of the hose, forming a closed internal cavity between the plugging plate, the hose, and the connector. This ensures no leakage occurs during subsequent injection of the heat medium and provides a sealed pressure environment for the shaping process. Heat medium is continuously injected into the internal cavity of the wear-resistant sleeve through the pre-set injection holes on the plugging plate. The temperature of the heat medium is strictly controlled within the range of 100℃-200℃, while the internal pressure is stabilized between 0.5MPa-1MPa. This temperature and pressure are maintained for 30-60 minutes, allowing the heat energy and pressure of the heat medium to act evenly on the inner wall of the wear-resistant sleeve. Under the combined effect of the temperature and pressure of the heat medium, the wear-resistant sleeve undergoes thermal expansion deformation, and its outer wall is tightly pressed against the inner wall of the hose and the inner wall of the locking core. The wear-resistant sleeve is in full contact and tightly fitted with both inner walls, achieving a firm bond and eliminating gaps between the sleeve and the inner wall. This ultimately forms a continuous, non-loosening, and non-detaching integrated wear-resistant lining structure.

[0087] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0088] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0089] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fracturing hose assembly, characterized in that, include: Hose connectors, hose bodies, and wear-resistant sleeves; The end of the hose body is provided with a stripping section; The hose connector includes a locking core with an inner cavity and a sleeve assembly fitted onto the outside of the locking core; The locking core is inserted into the inner cavity of the peeling section, the sleeve assembly is installed on the outside of the peeling section, and the sleeve assembly is deformed by pressing to clamp the peeling section between the locking core and the sleeve assembly; The outer surface of the locking core is provided with a plurality of first protrusions. The first protrusions are configured to cooperate with the sleeve assembly when the sleeve assembly is pressed and deformed, and to press the peeling section into a bent locking structure. The wear-resistant sleeve is installed in the inner cavity of the hose body and the inner cavity of the locking core, and the outer wall of the wear-resistant sleeve is in close contact with the inner wall of the hose body and the inner wall of the locking core, respectively.

2. The fracturing hose assembly according to claim 1, characterized in that, The sleeve assembly includes a first sleeve and a second sleeve fitted onto the outside of the first sleeve; The first sleeve is installed on the outside of the peeling section, and the inner wall of the first sleeve is provided with a second protrusion that cooperates with the first protrusion.

3. The fracturing hose assembly according to claim 1, characterized in that, The hose connector also includes a positioning ring; The positioning ring is disposed between the locking core and the sleeve assembly for axial positioning.

4. The fracturing hose assembly according to claim 2, characterized in that, The hose body comprises, from the inside out, an inner rubber layer, an inner fabric layer, a steel wire reinforcement layer, an outer fabric layer, and an outer rubber layer. The inner adhesive layer, the inner fabric layer, the outer adhesive layer, and the outer fabric layer corresponding to the peeling section are completely peeled off, exposing the steel wire reinforcement layer.

5. The fracturing hose assembly according to claim 4, characterized in that, The peeling length of the inner adhesive layer is matched with the length of the locking section of the locking core, and the locking section is the section on the locking core where the plurality of first protrusions are provided; The peeling length of the outer adhesive layer matches the length of the first sleeve.

6. The fracturing hose assembly according to claim 1, characterized in that, The wear-resistant sleeve includes a wear-resistant layer and a warning layer; The warning layer is a layer structure with color markings.

7. The fracturing hose assembly according to claim 1, characterized in that, The outer diameter of the first protrusion of the locking core is equal to the inner diameter of the peeling section; The inner diameter of the locking core is equal to the inner diameter of the hose body, and the outer diameter of the wear-resistant sleeve is equal to the inner diameter of both the locking core and the hose body.

8. A method for preparing a fracturing hose assembly as described in any one of claims 1 to 7, characterized in that, include: The ends of the hose are stripped of adhesive to create a stripped section. Insert the locking core of the hose connector into the inner cavity of the stripping section, and install the sleeve assembly of the hose connector on the outside of the stripping section; The sleeve assembly is radially deformed by a pressing process, and the peeling section is clamped and fixed between the locking core and the sleeve assembly. Multiple first protrusions on the outer surface of the locking core cooperate with the sleeve assembly to press the peeling section into a bent locking structure. The wear-resistant sleeve is installed in the inner cavity of the hose body and the inner cavity of the locking core; The wear-resistant sleeve is subjected to a secondary shaping process after installation, so that the outer wall of the wear-resistant sleeve is tightly bonded to the inner wall of the hose body and the inner wall of the locking core.

9. The method for preparing the fracturing hose assembly according to claim 8, characterized in that, The secondary shaping process for the installed wear-resistant sleeve specifically includes: Connect the plug to the end of the hose body; A heat medium is injected into the wear-resistant sleeve through an injection hole provided on the plug plate.

10. The method for preparing the fracturing hose assembly according to claim 8, characterized in that, Before performing secondary shaping treatment on the installed wear-resistant sleeve, the process also includes: The end of the wear-resistant sleeve is trimmed so that the end of the wear-resistant sleeve is flush with the end face of the locking core.

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