A fracturing hose for high-pressure oil fields

Abstract

This invention discloses a fracturing hose for high-pressure oil fields, relating to the field of fracturing hose technology. It includes a hose and a connector disposed at the end of the hose. The outer wall of the connector is provided with a limiting groove and a flange. A limiting component is disposed within the limiting groove. The flange is sleeved on the outside of the connector, and the limiting component is used to limit the position of the flange. The limiting component can replace the limiting screw used in the prior art, thus allowing for convenient installation even without the use of the limiting screw, and axially limiting the position of the flange. This effectively avoids the situation where the limiting screw is cut off by the flange in the prior art. When the flange and connector move relative to each other (usually the flange moves backward), causing the limiting component to detach from the inside of the flange, the limiting component remains as a whole in the limiting groove, preventing it from falling off the connector and injuring people.

Description

Technical Field

[0001] This invention relates to the field of fracturing hose technology, and more specifically, to a fracturing hose for high-pressure oil fields. Background Technology

[0002] Oilfield fracturing hoses, due to harsh operating conditions, high vibration, high pressure, and large flow rates and velocities of the internal medium, would experience stress cracking if the end connections between the steel pipe and the hose were welded. Therefore, flanges and bolts are typically used to connect the pipe ends. After the flange passes through the hose, it is usually... Figure 1 The flange is axially positioned by using split clamps and limit screws on the joint. Figure 2 The illustration shows a fracturing hose manufactured by FET (FORUM ENERGY TECHNOLOGY). This prior art is also used in the patent with patent number CN202410327290 to solve the problem of axial limiting of the flange.

[0003] However, this implementation method has significant problems and safety hazards during use. For example... Figure 3 As shown, the limiting screw located behind the flange will be cut off by the flange, and the cut end will be flattened. After the screw is cut off, the flange will move backward, and the internal split clamps will also fall off, potentially injuring someone. Furthermore, the flattened and deformed screw end cannot be removed, making subsequent maintenance impossible. Figure 4 The image shows a scene where, during the application of existing technology by the applicant's US client and at a PetroChina Western Drilling site, the bolts behind the flange were cut off, the flange shifted, all the internal segmented clamps fell out, and the broken bolt ends were flattened and jammed by the flange, making them impossible to remove. Therefore, the technical problem this invention aims to solve is how to eliminate the limiting screws while still ensuring that the segmented clamps do not fall off after the limiting screws are removed. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides a fracturing hose for high-pressure oil fields, comprising: a hose, and a connector disposed at the end of the hose, the connector being a tubular structure with an outer diameter of r, and the outer wall of the connector being provided with a limiting groove and a flange, the limiting groove being provided with a limiting component, the flange being sleeved on the outside of the connector, and the limiting component being used to limit the position of the flange.

[0006] Preferably, the limiting component consists of at least two arc-shaped limiting blocks and a connector. The limiting blocks are located within the limiting groove, and adjacent limiting blocks are connected by the connector. The limiting blocks are used to limit the position of the flange.

[0007] Preferably, the center hole of the flange is composed of a first hole with an inner diameter of R and a second hole with an inner diameter of Rf. The first hole and the second hole are connected, and Rf > R, R ≥ r. The connection between the first hole and the second hole forms a first end face that abuts against the limiting block.

[0008] Preferably, the limiting block includes an abutting end face that abuts against the inner bottom wall of the limiting groove, a second end face that abuts against the first end face, a third end face and a fourth end face that abut against the two inner side walls of the limiting groove, and a fifth end face that connects to the connector. The third end face and the fourth end face are respectively located on both sides of the abutting end face. The third end face is connected to the second end face, and the fourth end face is connected to the fifth end face. The fifth end face is located between the inner wall of the second hole and the outer wall of the connector.

[0009] Preferably, the connector is a ring-shaped first connector, which has at least two first through holes along the axial direction, and at least one threaded hole on the fifth end face of each limiting block. The number and position of the first through holes are adapted to the number and position of the threaded holes, and the first connector is connected to the fifth end face by screws.

[0010] Preferably, on the end face of the first connector away from the fifth end face, there are a plurality of mounting grooves arranged axially, and the screws are located in the mounting grooves.

[0011] Preferably, the connector is a plurality of arc-shaped second connectors, the number of the second connectors being adapted to the number of the limiting blocks. Each limiting block has at least two threaded holes on its fifth end face, the threaded holes being located at both ends of the limiting block. The second connector has at least two second through holes along the axial direction. The second connector is connected to the threaded holes by screws, and two adjacent limiting blocks are connected by the second connector.

[0012] Preferably, the connector is a third connector, which is detachably connected to the inner wall of the second hole, and the fifth end face selectively abuts against the end of the third connector.

[0013] Preferably, the inner wall of the second hole is provided with an internal thread, and the third connector is an annular structure provided with an external thread, and the outer wall of the third connector is threadedly connected to the inner wall of the second hole.

[0014] Preferably, the outer wall of the flange is provided with a third through hole communicating with the second hole, and an oil nozzle is provided at the opening of the third through hole near the outer wall of the flange.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] By incorporating a detachable limiting component, the limiting screws used in existing technologies and the patent with patent number CN202410327290 can be replaced. This allows for easy installation of the limiting component while eliminating the need for limiting screws, and it also provides axial positioning of the flange. This effectively avoids issues such as... Figure 3 and Figure 4 As shown in the diagram, when the limiting screw is cut off by the flange, and the flange and the joint move relative to each other (usually the flange moves backward), causing the limiting component to come out of the inside of the flange, the limiting component can still remain as a whole in the limiting groove, preventing it from falling off the joint and injuring people.

[0017] The fracturing hose for high-pressure oil fields described in this invention, other advantages, objectives and features of the invention will be apparent in part from the following description, and in part will be understood by those skilled in the art through study and practice of the invention. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is an exploded view of a fracturing hose that has defects in the existing technology.

[0020] Figure 2 This is a promotional image for existing technology.

[0021] Figure 3 This is a photograph of a limit screw after it has been cut in the prior art.

[0022] Figure 4 This is a photograph of a limit screw that cannot be removed after being cut in the existing technology.

[0023] Figure 5 This is a schematic diagram of the first embodiment of the connector.

[0024] Figure 6 This is a cross-sectional view of the first embodiment of the connector.

[0025] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0026] Figure 8This is a schematic diagram of a second embodiment of the connector.

[0027] Figure 9 This is an exploded view of the second embodiment of the connector.

[0028] Figure 10 This is an exploded view of the third embodiment of the connector.

[0029] Figure 11 for Figure 10 The exploded view shown is a cross-sectional view.

[0030] Figure 12 The figures show cross-sectional views of the prior art (shown as B in the figure) and three embodiments of the present invention (shown as C, D, and E in sequence).

[0031] Figure 13 This is a schematic diagram of the grease nipple on the flange.

[0032] In the diagram: 100 split clamp, 200 limit screw, 1 connector, 2 limit groove, 3 flange, 4 limit block, 5 first end face, 6 abutment end face, 7 second end face, 8 third end face, 9 fourth end face, 10 fifth end face, 11 first connector, 12 second connector, 13 third connector, 14 grease nipple. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0034] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0035] like Figures 1-12 As shown, the present invention provides a fracturing hose for high-pressure oil fields, comprising: a hose, and a connector 1 disposed at the end of the hose, the connector 1 being a tubular structure with an outer diameter of r, and the outer wall of the connector 1 being provided with a limiting groove 2 and a flange 3, the limiting groove 2 being disposed along the circumference of the outer wall of the connector 1, as shown. Figure 10As shown, an annular groove is formed around the outer wall of the connector 1. A limiting component is provided inside the limiting groove 2. The limiting component is a detachable, split structure, and the entire limiting component is annular with an outer diameter of Rx. During installation, the flange 3 is first placed on the connector 1, with the limiting groove 2 positioned in front of the flange 3 (near the opening end of the connector 1). Then, the limiting component is assembled onto the limiting groove 2, forming a single unit. The flange 3 is then moved towards the opening of the connector 1, so that the flange 3 is fitted over the connector 1 and the limiting component. The limiting component is used to axially limit the position of the flange 3. By providing a detachable limiting component, the limiting screws used in the prior art and the patent with patent number CN202410327290 can be replaced. Thus, even without using the limiting screws, the limiting component can still be easily installed and axially limit the position of the flange 3. This effectively avoids the occurrence of... Figure 3 and Figure 4 In the case where the limiting screw is cut off by the flange 3, when the flange 3 moves relative to the joint 1 (usually the flange 3 moves backward), causing the limiting component to come out of the flange 3, the limiting component can still remain as a whole on the limiting groove 2, preventing it from falling off the joint 1 and injuring people. The limiting component consists of at least two arc-shaped limiting blocks 4 and a connecting member. The limiting blocks 4 are located in the limiting groove 2, and adjacent limiting blocks 4 are connected by the connecting member. The limiting blocks 4 can be joined end to end to form a limiting ring with an outer diameter of Rx. Because the limiting blocks 4 of the present invention are connected by the connecting member, compared with the prior art that limits the limiting blocks 4 by the flange 3 and must be joined end to end to form a closed ring, the ends of adjacent limiting blocks 4 in the present invention can also be not joined. Depending on the usage scenario and usage requirements, there is a gap between adjacent limiting blocks 4. The limiting blocks 4 are used to limit the position of the flange 3. The center hole of the flange 3 is formed by a first hole with an inner diameter of R and a second hole with an inner diameter of Rf. The first hole and the second hole are located on the same central axis and are interconnected, and Rf≥Rx>R≥r. The connection between the first hole and the second hole forms a first end face 5 that abuts against the limiting block 4. Figure 11As shown. The limiting block 4 includes an abutting end face 6 that abuts against the inner bottom wall of the limiting groove 2, a second end face 7 that abuts against the first end face 5, a third end face 8 and a fourth end face 9 that abut against the two inner side walls of the limiting groove 2, and a fifth end face 10 that connects to the connector. The third end face 8 and the fourth end face 9 are located on both sides of the abutting end face 6. The third end face 8 is connected to the second end face 7, and the fourth end face 9 is connected to the fifth end face 10. The fifth end face 10 is located between the inner wall of the second hole and the outer wall of the connector 1. When installing the limiting block 4, the limiting block 4 is placed in the limiting groove 2, so that the abutting end face 6 (the inner arc surface of the arc-shaped limiting block 4) of the limiting block 4 abuts against the inner bottom wall of the limiting groove 2, as shown. Figure 12 As shown in Figures C, D, and E, at this point, the third end face 8 abuts against the inner wall of one side of the limiting groove 2, the fourth end face 9 abuts against the inner wall of the other side of the limiting groove 2, and the fifth end face 10 is located outside the limiting groove 2 and faces the opening of the connector 1 to facilitate the subsequent assembly and disassembly of the connecting parts. Depending on usage and design requirements, the fifth end face 10 and the fourth end face 9 can be located on the same plane, or the fifth end face 10 can be located outside the limiting groove 2 and extend towards the opening of the connector 1, as shown below. Figure 12 As shown, the fifth end face 10 and the fourth end face 9 can be two parallel surfaces, or they can be two surfaces with a non-zero included angle, such as... Figure 11 As shown. The fourth end face 9 and the third end face 8 can axially limit the position of the limiting block 4, preventing the limiting block 4 from axially wobbling within the limiting groove 2. After the limiting block 4 is placed in the limiting groove 2, the connector can connect all or two adjacent limiting blocks 4 into a whole through the fifth end face 10 (see the first and second embodiments of the connector), or the connector can selectively abut against the fifth end face 10 (see the third embodiment of the connector), thereby preventing the limiting assembly from dispersing and falling off the joint 1. After the limiting assembly is installed, the flange 3 is moved toward the opening of the joint 1, so that the first end face 5 abuts against the second end face 7, thereby allowing the limiting assembly to axially limit the position of the flange 3, preventing the flange 3 from falling off the joint 1. Because Rf≥Rx, flange 3 can rotate relative to the limiting assembly. In order to reduce wear and resistance caused by rotation, a third through hole communicating with the second hole is provided on the outer wall of flange 3. An oil nozzle 14 is provided at the opening of the third through hole near the outer wall of flange 3. Lubricating oil can be injected into the space where the limiting assembly exists through the oil nozzle 14, so that flange 3 can rotate freely relative to the limiting assembly and joint 1, which is convenient for rotating flange 3 to adjust the position of bolt holes during docking.

[0036] In a first embodiment of the connector, the connector is an annular first connector 11. The first connector 11 has at least two first through holes along the axial direction. Each limiting block 4 has at least one threaded hole on its fifth end face 10. The number and position of the first through holes correspond to the number and position of the threaded holes. The first connector 11 is connected to the fifth end face 10 by screws. Typically, the outer diameter of the first connector 11 is not greater than Rf, so that the first connector 11 can be housed in the space between the inner wall of the second hole and the outer wall of the joint 1. On the end face of the first connector 11 away from the fifth end face 10, several mounting grooves are provided along the axial direction, and the screws are located in the mounting grooves. Typically, when the outer diameter of the first connector 11 is less than Rf, there is a gap between the outer wall of the first connector 11 and the inner wall of the second hole. At this time, the limiting component can only restrict the movement of the flange 3 in one axial direction, that is, prevent the flange 3 from coming off the joint 1, but cannot prevent the flange 3 from moving away from the opening of the joint 1, thereby causing the flange 3 to move away from the opening of the joint 1. Although the separation of flange 3 from the limiting component will not affect the use of this invention, in order to achieve bidirectional axial position limitation of flange 3, an L-shaped groove can be provided on the inner wall of the second hole, and a protruding locking block can be provided on the outer wall of the first connector 11. During installation, the locking block of the first connector 11 is inserted into the groove and moves axially. When the locking block reaches the inflection point of the L-shaped groove, the first connector 11 is rotated to make the locking block and the groove engage and limit in the axial direction. Then, the first connector 11 is connected to the fifth end face 10 by screws, which can achieve bidirectional axial position limitation of flange 3.

[0037] In a second embodiment of the connector, the connector comprises a plurality of arc-shaped second connectors 12, the number of which corresponds to the number of limiting blocks 4. Each limiting block 4 has at least two threaded holes on its fifth end face 10, located at both ends of the limiting block 4. Each second connector 12 has at least two second through holes along its axial direction. The second connector 12 is connected to the threaded holes by screws, and adjacent limiting blocks 4 are connected by the second connector 12. During installation, the second connector 12 is installed at the joint between two limiting blocks 4. One part of the second connector 12 is connected to one end of one limiting block 4, and the other part is connected to one end of the other limiting block 4, such as... Figure 8 As shown. In this embodiment, compared with the first embodiment, it is not necessary to drill many holes in the limiting block 4, reducing the amount of processing work for the limiting block 4. Because the second connector 12 is only connected to a part of the limiting block 4, the arc-shaped second connector 12 can be used as a prefabricated part and a general-purpose part. It does not need to be used one-to-one as in the first embodiment of the connector, and can be mass-produced.

[0038] In the third embodiment of the connector, the connector is a third connector 13. The third connector 13 is detachably connected to the inner wall of the second hole, so that the third connector 13 can be connected to the flange 3 as a whole. In this embodiment, the fifth end face 10 is used as an abutment surface to limit the position of the third connector 13. When the flange 3 moves away from the opening of the joint 1, it will move the third connector 13 axially. The end of the third connector 13 will abut against the fifth end face 10, thereby limiting the axial position of the flange 3. Usually, the inner wall of the second hole is provided with internal threads, and the third connector 13 is a ring structure with external threads. The inner diameter of the third connector 13 is not less than r, as long as it can fit on the joint 1. The outer wall of the third connector 13 is threaded to the inner wall of the second hole. Because the third connector 13 adopts the implementation method of being integrated with the flange 3, the limiting block 4 does not need to be processed additionally, reducing the processing difficulty of the limiting block 4, reducing production costs, and effectively reducing lubricant leakage after oil is injected through the oil nozzle 14.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A fracturing hose for high-pressure oil fields, comprising: A hose, and a connector (1) disposed at the end of the hose, characterized in that the connector (1) is a tubular structure with an outer diameter of r, and the outer wall of the connector (1) is provided with a limiting groove (2) and a flange (3), the limiting groove (2) is disposed around the outer wall of the connector (1) to form an annular groove fitted on the outer wall of the connector (1), a limiting component is disposed in the limiting groove (2), the limiting component is a detachable split structure, the flange (3) is fitted on the outside of the connector (1), and the limiting component is used to limit the position of the flange (3); The limiting component consists of at least two arc-shaped limiting blocks (4) and a connector. The limiting blocks (4) are located in the limiting groove (2), and two adjacent limiting blocks (4) are connected by the connector. The limiting blocks (4) are used to limit the position of the flange (3). The limiting blocks (4) are joined end to end to form a limiting ring with an outer diameter of Rx, or there is a gap between the ends of adjacent limiting blocks (4); The center hole of the flange (3) is composed of a first hole and a second hole, the first hole and the second hole are connected, and the connection between the first hole and the second hole forms a first end face (5) that abuts against the limiting block (4). The connector is composed of a first connector (11) and a third connector (13), or is composed of a plurality of arc-shaped second connectors (12) and third connectors (13); The number of the second connector (12) is adapted to the number of the limiting blocks (4). Each limiting block (4) has at least two threaded holes on its fifth end face (10). The threaded holes are located at both ends of the limiting block (4). The second connector (12) has at least two second through holes along the axial direction. The second connector (12) is connected to the threaded holes by screws. Two adjacent limiting blocks (4) are connected by the second connector (12). The third connector (13) is detachably connected to the inner wall of the second hole, and the fifth end face (10) selectively abuts against the end of the third connector (13); The inner wall of the second hole is provided with an internal thread, and the third connector (13) is an annular structure provided with an external thread. The outer wall of the third connector (13) is threadedly connected to the inner wall of the second hole.

2. The fracturing hose for high-pressure oil fields according to claim 1, characterized in that, The inner diameter of the first hole is R, and the inner diameter of the second hole is Rf, where Rf > R ≥ r.

3. The fracturing hose for high-pressure oil fields according to claim 2, characterized in that, The limiting block (4) includes an abutting end face (6) that abuts against the inner bottom wall of the limiting groove (2), a second end face (7) that abuts against the first end face (5), a third end face (8) and a fourth end face (9) that abut against the two inner side walls of the limiting groove (2), and a fifth end face (10) that is connected to the connector. The third end face (8) and the fourth end face (9) are located on both sides of the abutting end face (6). The third end face (8) is connected to the second end face (7), and the fourth end face (9) is connected to the fifth end face (10). The fifth end face (10) is located between the inner wall of the second hole and the outer wall of the connector (1).

4. The fracturing hose for high-pressure oil fields according to claim 3, characterized in that, The first connector (11) is annular and has at least two first through holes along the axial direction. Each limiting block (4) has at least one threaded hole on its fifth end face (10). The number and position of the first through holes are adapted to the number and position of the threaded holes. The first connector (11) is connected to the fifth end face (10) by screws.

5. The fracturing hose for high-pressure oil fields according to claim 4, characterized in that, On the end face of the first connector (11) away from the fifth end face (10), there are a number of mounting grooves along the axial direction, and the screws are located in the mounting grooves.

6. The fracturing hose for high-pressure oil fields according to claim 1, characterized in that, The outer wall of the flange (3) is provided with a third through hole that communicates with the second hole, and an oil nozzle (14) is provided at the opening of the third through hole near the outer wall of the flange (3).

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