Fracturing hose for high-pressure oil field

Abstract

The invention discloses a fracturing hose for a high-pressure oil field, and relates to the technical field of fracturing hoses, the fracturing hose comprises a hose and a connector arranged at the end of the hose, the outer wall of the connector is provided with a limiting groove and a flange, a limiting assembly is arranged in the limiting groove, the flange is arranged outside the connector in a sleeving mode, and the flange is connected with the limiting assembly. The limiting assembly is used for limiting the position of the flange. The limiting assembly can replace a limiting screw used in the prior art, and therefore under the condition that the limiting screw is not used, the limiting assembly can still be conveniently installed, and the position of the flange is limited in the axial direction. Therefore, the situation that the limiting screw is cut off by the flange in the prior art is effectively avoided, and when the flange and the connector generate relative movement (generally, the flange moves backwards), and the limiting assembly is separated from the interior of the flange, the limiting assembly can still serve as a whole to be reserved on the limiting groove, and the situation that the limiting assembly falls off from the connector and hurts people is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing hoses, and more particularly to a fracturing hose used in high-pressure oil fields. Background Art

[0002] Oilfield fracturing hose, due to the harsh working conditions, large vibration, high pressure, large internal medium flow, high flow rate and other reasons, if the end connectors of the steel pipe and the hose are connected by welding, stress cracking will occur during use, so the pipe ends are usually connected by flanges and bolts. After the flange passes through the hose, it is usually Figure 1 The axial position of the flange is limited by arranging a split clamp and a limit screw on the joint. Figure 2 This is a demonstration diagram of a fracturing hose produced by FET (FORUM ENERGY TECHNOLOGY). Patent No. CN202410327290 also applies this prior art to solve the problem of axial limitation of the flange.

[0003] However, this implementation method has huge problems and potential safety hazards during use. Figure 3 As shown in the figure, the limit screw behind the flange will be cut off by the flange and the cut-off portion will be flattened. After the screw is cut off, the flange moves backward and the internal split clamp will fall off, injuring people. In addition, the screw cut-off portion cannot be removed after being flattened and deformed, making subsequent maintenance impossible. Figure 4 The following are photos of the applicant's American client and the western drilling site of PetroChina using the prior art. The bolts behind the flange were cut off, the flange was displaced, the internal split clamps all fell out, and the screw fractures were flattened by the flange and stuck and could not be removed. Therefore, how to cancel the limit screws and still ensure that the split clamps will not fall off after canceling the limit screws is a technical problem to be solved by the present invention. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

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

[0006] Preferably, the limiting assembly is composed of at least two arc-shaped limiting blocks and a connecting piece, the limiting block is located in the limiting groove, and two adjacent limiting blocks are connected by the connecting piece, and the limiting block is 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 is connected to the second hole, and Rf>R, R≥r. The connection between the first hole and the second hole forms a first end face abutting against the limit block.

[0008] Preferably, the limit block includes an abutting end face abutting the inner bottom wall of the limit groove, a second end face abutting the first end face, a third end face and a fourth end face abutting the two inner side walls of the limit groove, and a fifth end face connected to the connecting piece, 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, the fourth end face is connected to the fifth end face, and the fifth end face is located between the inner wall of the second hole and the outer wall of the joint.

[0009] Preferably, the connecting member is an annular first connecting member, the first connecting member is provided with at least two first through holes in the axial direction, and at least one threaded hole is provided on the fifth end face of each limit block, the number and position of the first through holes are adapted to the number and position of the threaded holes, and the first connecting member is connected to the fifth end face by screws.

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

[0011] Preferably, the connecting member is a plurality of arc-shaped second connecting members, the number of the second connecting members is adapted to the number of the limit blocks, at least two threaded holes are arranged on the fifth end face of each limit block, the threaded holes are located at both ends of the limit block, the second connecting member is axially provided with at least two second through holes, the second connecting member is connected to the threaded holes by screws, and two adjacent limit blocks are connected by the second connecting member.

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

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

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

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

[0016] By setting a detachable limit assembly, the limit screws used in the prior art and the patent with patent number CN202410327290 can be replaced. In this way, when the limit screws are not used, the limit assembly can still be easily installed and the position of the flange can be limited in the axial direction. This effectively avoids the following problems: Figure 3 and Figure 4 In the case where the limit screw is cut off by the flange as shown in the figure, when the flange and the joint move relative to each other (usually the flange moves backward), causing the limit assembly to fall out of the inside of the flange, the limit assembly can still remain in the limit groove as a whole, avoiding falling off the joint and injuring people.

[0017] The other advantages, objectives and features of the fracturing hose for high-pressure oil fields described in the present invention will be partially reflected in the following description, and will also be partially understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 The exploded view of the fracturing hose having defects in the prior art.

[0020] Figure 2 This is a promotional image of the prior art.

[0021] Figure 3 This is a photo of the limit screw after being sheared in the prior art.

[0022] Figure 4 This is a photo of a prior art in which a limit screw cannot be removed after being sheared.

[0023] Figure 5 A schematic diagram of a first embodiment of a connecting piece.

[0024] Figure 6 It is a cross-sectional view of a first embodiment of a connecting piece.

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

[0026] Figure 8Schematic diagram of a second embodiment of the connecting member.

[0027] Fig. 9 It is an exploded view of the second embodiment of the connecting piece.

[0028] Fig.10 It is an exploded view of the third embodiment of the connecting piece.

[0029] Fig.11 for Fig.10 A cross-sectional view of the exploded view shown.

[0030] Fig.12 It is a cross-sectional view of the prior art (shown in B in the figure) and three embodiments of the present invention (the three embodiments are shown in C, D, and E respectively).

[0031] Fig.13 Schematic diagram of the oil nozzle on the flange.

[0032] In the figure: 100 split clamp, 200 limit screws, 1 joint, 2 limit grooves, 3 flanges, 4 limit blocks, 5 first end faces, 6 abutting end faces, 7 second end faces, 8 third end faces, 9 fourth end faces, 10 fifth end faces, 11 first connecting pieces, 12 second connecting pieces, 13 third connecting pieces, 14 oil nozzles. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

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

[0035] like Figure 1-Figure 12 As shown, the present invention provides a fracturing hose for high-pressure oil fields, comprising: a hose, and a joint 1 arranged at the end of the hose, the joint 1 is a tubular structure with an outer diameter of r, and the outer wall of the joint 1 is provided with a limiting groove 2 and a flange 3, the limiting groove 2 is arranged along the circumference of the outer wall of the joint 1, as shown in FIG. Fig.10As shown, an annular groove is formed on the outer wall of the joint 1, and a limiting component is arranged in the limiting groove 2. The limiting component is a detachable split structure, and the limiting component is in the shape of a ring with an outer diameter of Rx. During installation, the flange 3 is first put on the joint 1, and the limiting groove 2 is located in front of the flange 3 (close to the opening end of the joint 1), and then the limiting component is assembled on the limiting groove 2, and the limiting component is formed as a whole and installed on the limiting groove 2, and then the flange 3 is moved in the direction of the opening of the joint 1, so that the flange 3 is sleeved on the outside of the joint 1 and the limiting component, and the limiting component is used to limit the position of the flange 3 in the axial direction. By setting a detachable limiting component, the limiting screws used in the prior art and the patent with patent number CN202410327290 can be replaced, so that when the limiting screws are not used, the limiting component can still be easily installed, and the position of the flange 3 can be limited in the axial direction. This effectively avoids the following problems: Figure 3 and Figure 4 The limit screw shown in the figure is cut off by the flange 3. When the flange 3 and the joint 1 move relative to each other (usually the flange 3 moves backward), causing the limit assembly to fall out of the flange 3, the limit assembly can still remain on the limit groove 2 as a whole to avoid falling off the joint 1 and injuring people. The limit assembly is composed of at least two arc-shaped limit blocks 4 and a connecting piece. The limit block 4 is located in the limit groove 2, and two adjacent limit blocks 4 are connected by the connecting piece. The limit blocks 4 are connected end to end to form a limit ring with an outer diameter of Rx. Because the limit blocks 4 of the present invention are connected by connecting pieces, compared with the prior art in which the limit blocks 4 are limited by the flange 3 and must be connected end to end to form a closed ring, the adjacent limit blocks 4 of the present invention may not be connected end to end. According to different usage scenarios and usage requirements, a state in which there is a gap between two adjacent limit blocks 4 is formed. The limit block 4 is used to limit the position of the flange 3. The center hole of the flange 3 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 located on the same central axis and are connected to each other, 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 limit block 4. Fig.11As shown. The limit block 4 includes an abutting end face 6 abutting against the inner bottom wall of the limit groove 2, a second end face 7 abutting against the first end face 5, a third end face 8 and a fourth end face 9 abutting against the two inner side walls of the limit groove 2, and a fifth end face 10 connected to the connecting piece, the third end face 8 and the fourth end face 9 are respectively located on both sides of the abutting end face 6, the third end face 8 is connected to the second end face 7, the fourth end face 9 is connected to the fifth end face 10, and the fifth end face 10 is located between the inner wall of the second hole and the outer wall of the joint 1. When installing the limit block 4, place the limit block 4 in the limit groove 2, and let the abutting end face 6 of the limit block 4 (the inner arc surface of the arc-shaped limit block 4) abut against the inner bottom wall of the limit groove 2, as shown Fig.12 As shown in Figures C, D, and E, at this time, the third end face 8 abuts against the inner side wall of one side of the limiting groove 2, the fourth end face 9 abuts against the inner side 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 disassembly and assembly of the connector. According to the use and design requirements, the fifth end face 10 and the fourth end face 9 can be located on the same plane, and the fifth end face 10 can also be located outside the limiting groove 2 and extend to the opening of the connector 1, as shown in Figures C, D, and E. Fig.12 As shown, the fifth end face 10 and the fourth end face 9 may be two parallel surfaces, or may be two surfaces having a non-zero angle, such as Fig.11 As shown. The fourth end face 9 and the third end face 8 can limit the position of the limit block 4 in the axial direction to prevent the limit block 4 from shaking axially in the limit groove 2. After the limit block 4 is placed in the limit groove 2, the connector can connect all or two adjacent limit blocks 4 as a whole through the fifth end face 10 (see the first and second embodiments of the connector for details), or the connector can selectively abut against the fifth end face 10 (see the third embodiment of the connector for details), so that the limit assembly will not disperse and fall off from the joint 1. After the limit assembly is installed, move the flange 3 toward the opening direction of the joint 1, so that the first end face 5 abuts against the second end face 7, so that the limit assembly can limit the position of the flange 3 in the axial direction to prevent the flange 3 from falling off the joint 1. Because Rf≥Rx, the flange 3 can rotate relative to the limit assembly. In order to reduce the wear and resistance caused by the rotation, a third through hole connected to the second hole is provided on the outer wall of the flange 3, and an oil nozzle 14 is provided at the opening of the third through hole near the outer wall of the flange 3. Lubricating oil can be injected into the space where the limit assembly is located through the oil nozzle 14, so that the flange 3 can be rotated freely relative to the limit assembly and the joint 1, which is convenient for rotating the flange 3 to adjust the position of the bolt hole during docking.

[0036] In a first embodiment of the connector, the connector is an annular first connector 11, the first connector 11 is provided with at least two first through holes in the axial direction, and at least one threaded hole is provided on the fifth end face 10 of each limit block 4, the number and position of the first through holes are adapted to the number and position of the threaded holes, and the first connector 11 is connected to the fifth end face 10 by screws. Usually, the outer diameter of the first connector 11 is not greater than Rf, so that the first connector 11 can be received in the space between the inner wall of the second hole and the outer wall of the joint 1, and a plurality of mounting grooves are provided in the axial direction on the end face of the first connector 11 away from the fifth end face 10, and the screws are located in the mounting grooves. Usually, when the outer diameter of the first connector 11 is less than Rf, a gap is left between the outer wall of the first connector 11 and the inner wall of the second hole. At this time, the limit assembly can only limit the movement of the flange 3 in a single direction in the axial direction, that is, to prevent the flange 3 from falling out of the joint 1, but it cannot prevent the flange 3 from moving in the direction away from the opening of the joint 1, thereby causing the law The flange 3 is separated from the limit assembly. Although the separation of the flange 3 and the limit assembly will not affect the use of the present invention, in order to achieve the bidirectional axial position limitation of the flange 3, an L-shaped groove can be set on the inner wall of the second hole, and a raised block can be set on the outer wall of the first connecting member 11. During installation, the block of the first connecting member 11 is inserted into the groove and moved axially. When the block reaches the turning point of the L-shaped groove, the first connecting member 11 is rotated to allow the block and the groove to be axially engaged and limited, and then the first connecting member 11 is connected to the fifth end face 10 by screws, so that the bidirectional axial position limitation of the flange 3 can be achieved.

[0037] In a second embodiment of the connecting member, the connecting member is a plurality of arc-shaped second connecting members 12, the number of the second connecting members 12 is adapted to the number of the limiting blocks 4, at least two threaded holes are provided on the fifth end face 10 of each limiting block 4, the threaded holes are located at both ends of the limiting block 4, the second connecting member 12 is axially provided with at least two second through holes, the second connecting member 12 is connected to the threaded holes by screws, and two adjacent limiting blocks 4 are connected by the second connecting member 12. When the second connecting member 12 is installed, it is installed at the joint of the two limiting blocks 4, a part of the second connecting member 12 is connected to one end of one of the limiting blocks 4, and the other part is connected to one end of the other limiting block 4, such as Figure 8 In this embodiment, compared with the first embodiment, it is not necessary to drill many holes on the limit block 4, which reduces the processing workload of the limit block 4. Because the second connecting member 12 is only connected to a part of the limit block 4, the arc-shaped second connecting member 12 can be used as a prefabricated member and a universal member, and does not need to be used for one thing like the first embodiment of the connecting member, and can be mass-produced.

[0038] In the third embodiment of the connector, the connector is a third connector 13, and 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 for limiting the third connector 13. When the flange 3 moves in a direction away from the opening of the joint 1, it will move along the axial direction with the third connector 13, and 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 an internal thread, and the third connector 13 is an annular structure provided with an external thread, and the inner diameter of the third connector 13 is not less than r, as long as it can be sleeved on the joint 1, and the outer wall of the third connector 13 is threadedly connected to the inner wall of the second hole. Because the third connector 13 adopts an embodiment of being connected to the flange 3 as a whole, the limit block 4 does not need to be processed additionally, which reduces the processing difficulty of the limit block 4 and reduces the production cost. After oiling through the oil nozzle 14, it can effectively reduce the leakage of lubricating oil.

[0039] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A fracturing hose for high-pressure oil fields, comprising: A hose and a connector (1) arranged 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 limit groove (2) and a flange (3), a limit component is arranged in the limit groove (2), the flange (3) is sleeved on the outside of the connector (1), and the limit component is used to limit the position of the flange (3).

2. The fracturing hose for high pressure oil fields according to claim 1, characterized in that: The limiting assembly is composed of at least two arc-shaped limiting blocks (4) and a connecting piece. The limiting block (4) is located in the limiting groove (2), and two adjacent limiting blocks (4) are connected via the connecting piece. The limiting block (4) is used to limit the position of the flange (3).

3. The fracturing hose for high pressure oil fields according to claim 2, characterized in that: The center hole of the flange (3) 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 is connected to the second hole, and Rf>R, R≥r. The connection between the first hole and the second hole forms a first end surface (5) that abuts against the limit block (4).

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

5. The fracturing hose for high pressure oil field according to claim 4, characterized in that: The connecting member is an annular first connecting member (11), the first connecting member (11) is provided with at least two first through holes along the axial direction, and at least one threaded hole is provided on the fifth end face (10) of each limit block (4), the number and position of the first through holes are adapted to the number and position of the threaded holes, and the first connecting member (11) is connected to the fifth end face (10) by means of screws.

6. The fracturing hose for high pressure oil fields according to claim 5, characterized in that: A plurality of mounting grooves are axially arranged on the end surface of the first connecting member (11) away from the fifth end surface (10), and the screws are located in the mounting grooves.

7. The fracturing hose for high pressure oil fields according to claim 4, characterized in that: The connecting member is a plurality of arc-shaped second connecting members (12), the number of the second connecting members (12) is adapted to the number of the limiting blocks (4), at least two threaded holes are arranged on the fifth end face (10) of each limiting block (4), the threaded holes are located at both ends of the limiting block (4), the second connecting member (12) is axially provided with at least two second through holes, the second connecting member (12) is connected to the threaded holes by means of screws, and two adjacent limiting blocks (4) are connected by means of the second connecting member (12).

8. The fracturing hose for high pressure oil fields according to claim 4, characterized in that: The connecting member is a third connecting member (13), the third connecting member (13) is detachably connected to the inner wall of the second hole, and the fifth end surface (10) selectively abuts against the end of the third connecting member (13).

9. The fracturing hose for high-pressure oil fields according to claim 8, characterized in that: The inner wall of the second hole is provided with an internal thread, the third connecting piece (13) is an annular structure provided with an external thread, and the outer wall of the third connecting piece (13) is threadedly connected to the inner wall of the second hole.

10. The fracturing hose for high pressure oil field according to claim 3, characterized in that: The outer wall of the flange (3) is provided with a third through hole connected to the second hole, and an oil nozzle (14) is provided at an opening of the third through hole close to the outer wall of the flange (3).

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