Joint for connecting pipelines with different pipe diameters

Abstract

The utility model provides a joint for connecting pipelines with different pipe diameters, which comprises a joint body, a communicating hole and an interface channel communicated with the communicating hole are arranged in the joint body, the inner peripheral wall of the interface channel is provided with a threaded section and a first inclined surface arranged obliquely, and the first inclined surface is positioned between the communicating hole and the threaded section; a fixing assembly used for fixing a pipeline is arranged in the connector channel, the fixing assembly comprises a plurality of pressing blocks and a locking nut, an inserting channel allowing the pipeline to be inserted is defined by the multiple pressing blocks, each pressing block is provided with a second inclined face, and the second inclined faces make sliding contact with the first inclined faces; one end of the locking nut is inserted into the connector channel and is in threaded connection with the threaded section, and the locking nut is provided with an avoiding hole for a pipeline to penetrate through. In the acidification construction process of a fixed pipe column, the connector can be used for connecting acid liquor tank trucks with liquid discharging pipelines with different diameters, and the problem that the size of a connector of the pipe connector is not matched with the pipe diameter of the liquid discharging pipeline is solved.

Description

Technical Field

[0001] The utility model relates to a pipe joint, in particular to a joint used for connecting pipes with different diameters. Background Art

[0002] Acidizing is a widely used, effective method for decontaminating near-wellbore formations and restoring oil and gas well productivity. Conventional acidizing involves running a dedicated acidizing string, which involves removing the original production string from the wellbore and injecting acid. Following acid injection, the acidizing string is removed and the original production string is run back in to resume production. However, unmoving a string acidizing operation presents significant challenges, including long cycle times, complex construction techniques, high costs, demanding environmental requirements, and new reservoir contamination caused by recovering the string and flushing operations. To address these issues, oilfield engineers have conducted extensive research in recent years on unmoving a string. Unmoving a string involves not running a dedicated acidizing string, but injecting acidizing fluid through the annulus of the original production string's casing. After the operation is complete, pumping can resume production directly. Unmoving a string acidizing operation, with its advantages of short cycle times, simple procedures, low costs, and minimal environmental impact, has attracted significant interest and attention from major oilfield companies.

[0003] Currently, the static string acidizing process primarily involves preparing different treatment fluids on-site according to the recipe using dedicated liquid preparation tanks before the operation. These treatment fluids are then sequentially injected using cement pump trucks according to the construction plan. This results in a large number of liquid preparation tanks, a large amount of residual fluid in the tanks after the operation, and a large construction area. This increases construction costs, raises safety and environmental risks, and increases the difficulty of residual fluid disposal. To address these issues, dedicated acidizing tank trucks are used to transport the acid prepared at the preparation plant to the construction well site. These tank trucks are then connected to the inlet of the construction truck, allowing the treatment fluid to be directly injected into the construction well, achieving the desired effect. However, due to the varying sizes of the discharge outlets on the acidizing tank trucks, the diameters of the discharge pipes connected to these outlets also vary. Conventional pipe joints are typically used to connect pipes of fixed diameters. During static string acidizing, using these conventional pipe joints to connect the discharge pipes suffers from a mismatch between the size of the joint and the diameter of the pipe, leading to poor sealing and severe acid leakage. Utility Model Content

[0004] In response to the above-mentioned technical problems, the utility model provides a joint for connecting pipes of different diameters.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0006] A connector for connecting pipes of different diameters, comprising a connector body, a connecting hole and at least two interface channels for connecting to the pipes, one end of the interface channel being connected to the connecting hole, and the other end of the interface channel passing through the outer side of the connector body, at least one of the interface channels being equipped with a fixing assembly for fixing the pipe, the inner peripheral wall of the interface channel equipped with the fixing assembly having a threaded section and an inclined first inclined surface, the first inclined surface being located between the connecting hole and the threaded section; the fixing assembly comprising a plurality of pressing blocks and a locking nut, the plurality of pressing blocks surrounding the fixing block The central axes of the interface channel are arranged at intervals, and a plug-in channel for inserting the pipe is formed between the plurality of pressure blocks. Each of the pressure blocks is provided with a second inclined surface, and the second inclined surface is in sliding contact with the first inclined surface; one end of the locking nut is inserted into the interface channel and threadedly connected to the threaded section, and the locking nut is provided with an avoidance hole for the pipe to pass through. When the locking nut is rotated under force, it can move toward the plurality of pressure blocks and resist the plurality of pressure blocks to push the second inclined surface of the pressure block to move along the first inclined surface, thereby causing the plurality of pressure blocks to move toward the plug-in channel.

[0007] Furthermore, the first inclined surface gradually inclines outward in a direction away from the communicating hole; and the inclination angle of the second inclined surface is the same as the inclination angle of the first inclined surface.

[0008] Furthermore, the end surface of the pressure block facing the locking nut is provided with an abutment surface, and the abutment surface is gradually inclined inward along the direction away from the communicating hole; the end surface of the locking nut facing the pressure block is provided with a supporting surface, and the inclination direction of the supporting surface is the same as that of the abutment surface, and the supporting surface is in contact with the abutment surface.

[0009] Furthermore, the end surface of the pressure block facing the locking nut is provided with an abutting surface, and the end surface of the locking nut facing the pressure block is provided with a supporting surface, the supporting surface is in contact with the abutting surface, and the supporting surface and the abutting surface are both planes.

[0010] Furthermore, two interface channels are provided in the connector body, the two interface channels are respectively connected to the opposite ends of the communicating hole, and the fixing components are provided in both interface channels.

[0011] Furthermore, the locking nut includes a cap body and a flange protruding from the outer peripheral wall of the cap body at one end away from the connecting hole, and the end of the cap body away from the flange is inserted into the interface channel and threadedly connected to the threaded section; the avoidance hole passes through the cap body along the axial direction of the cap body.

[0012] Furthermore, the side surface of the pressing block facing the insertion channel is a concave arc surface.

[0013] Furthermore, the interface channel includes a connecting portion and an interface portion, and the first inclined surface is arranged to form the connecting portion so that the cross-sectional area of the connecting portion gradually increases in the direction away from the connecting hole, and the connecting portion connects the connecting hole and the interface portion; the interface portion passes through the outer side surface of the connector body, and an internal thread is provided on the inner peripheral wall of the interface portion to constitute the threaded section.

[0014] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0015] The utility model discloses a joint for connecting pipes of different diameters. Pipes of different diameters can be connected to the joint through a fixing component. During the acidizing construction process of a fixed pipe column, the joint can be used to connect acid tankers with discharge pipes of different diameters, and the defects of poor sealing and serious acid leakage caused by the mismatch between the interface size of the pipe joint and the diameter of the discharge pipe are solved. The risks of safety and environmental protection are reduced, the difficulty of residual liquid treatment is reduced, and the construction cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a connector for connecting pipes of different diameters after being connected to the pipes in a preferred embodiment of the present invention;

[0017] Figure 2 for Figure 1 A schematic cross-sectional view of the connector shown with the fixing assembly removed;

[0018] Figure 3 for Figure 1 A schematic cross-sectional view of a portion of the structure in the joint shown;

[0019] In the accompanying drawings, 100, connector; 10, connector body; 11, connecting hole; 12, interface channel; 121, first inclined surface; 123, threaded section; 124, connecting portion; 125, interface portion; 30, fixing assembly; 31, pressure block; 310, plug-in channel; 312, second inclined surface; 313, abutting surface; 33, locking nut; 331, avoidance hole; 332, cap body; 334, flange; 335, abutting surface; 200, pipeline; 400, rubber sealing ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Please also see Figures 1 to 3 A preferred embodiment of the present invention provides a connector 100 for connecting pipes of different diameters, including a connector body 10, wherein the connector body 10 is provided with a connecting hole 11 and two interface channels 12 respectively used for connecting to the pipe 200, one end of the interface channel 12 is connected to the connecting hole 11, and the other end of the interface channel 12 passes through the outer side surface of the connector body 10.

[0024] In this embodiment, the connector body 10 is generally block-shaped, with two interface channels 12 disposed at opposite ends of the connecting hole 11, coaxially arranged with the connecting hole 11. The inner circumferential wall of each interface channel 12 includes a threaded section 123 and an inclined first bevel 121, which is located between the connecting hole 11 and the threaded section 123. Specifically, in this embodiment, each interface channel 12 includes a connecting portion 124 and an interface portion 125. The first bevel 121 is arranged to form the connecting portion 124. The first bevel 121 gradually tilts outward away from the connecting hole 11, such that the cross-sectional area of the connecting portion 124 gradually increases as it moves away from the connecting hole 11. The connecting portion 124 connects the connecting hole 11 with the interface portion 125. The end of the interface portion 125, distal from the connecting portion 124, extends through the outer side of the connector body 10. The inner circumferential wall of the interface portion 125 is provided with internal threads (not shown) to form the threaded section 123.

[0025] Each interface channel 12 is equipped with a fixing assembly 30 for fixing the pipe 200. The fixing assembly 30 includes a plurality of pressure blocks 31 and a locking nut 33. The plurality of pressure blocks 31 are spaced apart around the central axis of the interface channel 12, and a plug-in channel 310 for inserting the pipe 200 is formed between the plurality of pressure blocks 31. Each pressure block 31 is provided with a second inclined surface 312. The inclination angle of the second inclined surface 312 is the same as the inclination angle of the first inclined surface 121 and is in sliding contact with the first inclined surface 121. In this embodiment, the side surface of the pressure block 31 facing the plug-in channel 310 is a concave arc surface; the end surface of the pressure block 31 away from the connecting hole 11 is provided with an inclined abutment surface 313, and the abutment surface 313 gradually tilts inward in the direction away from the connecting hole 11.

[0026] The locking nut 33 is located at the end of the pressure block 31 away from the connecting hole 11. One end of the locking nut 33 is inserted into the interface channel 12 and threadedly connected to the threaded segment 123. The locking nut 33 is provided with a bypass hole 331 for the pipe 200 to pass through. The aperture of the bypass hole 331 is larger than the outer diameter of the pipe 200. In this embodiment, the locking nut 33 includes a cap body 332 and a flange 334 formed on the outer peripheral wall of the cap body 332 at the end away from the connecting hole 11. The end of the cap body 332 away from the flange 334 is inserted into the interface channel 12. The outer peripheral wall of the cap body 332 is provided with external threads (not shown) that are threadedly connected to the threaded segment 123. The bypass hole 331 extends axially through the cap body 332. An end surface of the locking nut 33 facing the pressing block 31 is provided with an inclined abutting surface 335 . The inclination direction of the abutting surface 335 is the same as that of the abutting surface 313 , and the abutting surface 335 is in contact with and fits with the abutting surface 313 .

[0027] When using the connector 100 to connect a pipe 200, first, the pipe 200 to be connected is passed through the avoidance hole 331 of the locking nut 33 at the corresponding interface channel 12, and then inserted into the corresponding interface channel 12 until one end of the pipe 200 to be connected abuts against the first inclined surface 121 of the connecting portion 124. To improve the sealing performance of the connection between the pipe 200 to be connected and the connector 100, a rubber sealing ring 400 with a diameter comparable to the outer diameter of the pipe 200 to be connected can be placed in the interface channel 12 of the connector 100. During the insertion of the pipe 200 into the interface channel 12, the rubber sealing ring 400 is subjected to pressure from the pipe 200 to seal the gap between the pipe 200 and the first inclined surface 121 of the connector 100, thereby performing a sealing function. Then, a plurality of pressing blocks 31 are placed into the corresponding interface channel 12, for example, 3-4 pressing blocks 31, so that the pressing blocks 31 are distributed around the outer periphery of the pipe 200 to be connected, so that the pipe 200 to be connected is located within the insertion channel 310 formed by the pressing blocks 31. Before inserting the pressing block 31, the locking nut 33 should be slid away from the joint 100 to prevent the locking nut 33 from obstructing the insertion of the pressing block 31. Finally, push the locking nut 33 toward the joint 100 and twist the locking nut 33 by hand or with a wrench so that the locking nut 33 is inserted into the corresponding interface channel 12 and threadedly connected with the threaded section 123. When the locking nut 33 is rotated under force, it moves toward the plurality of pressing blocks 31 and contacts the plurality of pressing blocks 31, pushing the second inclined surface 312 of the pressing block 31 along the first inclined surface 121, thereby causing the plurality of pressing blocks 31 to move toward the insertion channel 310, that is, toward the direction of the pipe 200 to be connected, to clamp the pipe 200 to be connected. After the pipe 200 is connected and the pressure test is passed, the acidizing operation of the fixed pipe string is carried out.

[0028] The connector 100 of this embodiment is used to connect pipes of different diameters. A fixing assembly 30 is provided in the interface channel 12. Several pressing blocks 31 of the fixing assembly 30 can be moved toward the pipe 200 to be connected under the push of the locking nut 33, and then the diameter of the plug-in channel 310 is adjusted according to the outer diameter of the pipe 200 to be connected, so that pipes 200 of different diameters can be connected to the connector 100. During the acidizing construction process of the fixed pipe string, the connector 100 can be used to connect acid tankers with discharge pipes of different diameters, and solve the problem of poor sealing and serious acid leakage caused by the mismatch between the interface size of the pipe connector 100 and the diameter of the discharge pipe, thereby reducing the risks of safety and environmental protection, reducing the difficulty of residual liquid treatment, and reducing construction costs.

[0029] Please see again Figure 3In this embodiment of the connector 100 for connecting pipes of different diameters, the side of the pressure block 31 facing the locking nut 33 is provided with an inclined abutment surface 313. The abutment surface 335 of the locking nut 33, where the pressure block 31 contacts the pressure block 31, is inclined at the same angle as the abutment surface 313. Therefore, when the locking nut 33 abuts against the pressure blocks 31, the locking nut 33 exerts a downward force and a horizontal force on the pressure blocks 31. The downward force causes the pressure block 31 to contact the first inclined surface 121 of the connecting portion 124 of the connector 100, while the horizontal force pushes the pressure block 31 into contact with the outer surface of the pipe 200 to be connected, thereby further enhancing the clamping force of the pressure block 31 on the pipe 200 and ensuring a more secure connection. Furthermore, the side of the pressure block 31 facing the insertion channel 310 is a concave arc surface, which increases the contact area between the pressure block 31 and the pipe 200, thereby ensuring a more secure clamping of the pipe 200.

[0030] It is understandable that in other embodiments, the abutting surface 313 of the pressing block 31 and the abutting surface 335 of the locking nut 33 may both be planes. In this case, the locking nut 33 applies a downward force to the pressing block 31 .

[0031] It is understandable that in other embodiments, the fixing assembly 30 may be provided in only one of the interface channels 12 , and the interface channel 12 may be connected to pipes 200 of different diameters, while the other interface channel 12 is used to connect pipes 200 of the same size.

[0032] It is understood that in other embodiments, more than two interface channels 12 with fixing components 30 may be provided to connect multiple pipes 200 at the same time.

[0033] The above description is a detailed description of the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A joint for connecting pipes of different diameters, comprising a joint body, wherein the joint body is provided with a communication hole and at least two interface channels for connecting to the pipes, one end of the interface channel being in communication with the communication hole, and the other end of the interface channel being passed through the outer side of the joint body, characterized in that: At least one of the interface channels is equipped with a fixing component for fixing the pipeline, and the inner peripheral wall of the interface channel equipped with the fixing component has a threaded section and an inclined first inclined surface, and the first inclined surface is located between the communicating hole and the threaded section; the fixing component includes a plurality of pressure blocks and a locking nut, and the plurality of pressure blocks are arranged at intervals around the central axis of the interface channel, and a plug-in channel for inserting the pipeline is formed between the plurality of pressure blocks, and each of the pressure blocks is provided with a second inclined surface, and the second inclined surface is in sliding contact with the first inclined surface; one end of the locking nut is inserted into the interface channel and threadedly connected to the threaded section, and the locking nut is provided with an avoidance hole for the pipeline to pass through, and when the locking nut is rotated under force, it can move toward the plurality of pressure blocks and resist the plurality of pressure blocks to push the second inclined surface of the pressure block to move along the first inclined surface, thereby causing the plurality of pressure blocks to move in a direction close to the plug-in channel.

2. The connector for connecting pipes of different diameters according to claim 1, wherein: The first inclined surface gradually inclines outward in a direction away from the communicating hole; and the inclination angle of the second inclined surface is the same as the inclination angle of the first inclined surface.

3. The connector for connecting pipes of different diameters according to claim 1, wherein: The end surface of the pressure block facing the locking nut is provided with an abutment surface, and the abutment surface is gradually inclined inward along the direction away from the communicating hole; the end surface of the locking nut facing the pressure block is provided with a supporting surface, and the inclination direction of the supporting surface is the same as that of the abutment surface, and the supporting surface is in contact with the abutment surface.

4. The connector for connecting pipes of different diameters according to claim 1, wherein: The end surface of the pressure block facing the locking nut is provided with an abutting surface, and the end surface of the locking nut facing the pressure block is provided with a supporting surface. The supporting surface contacts and cooperates with the abutting surface, and both the supporting surface and the abutting surface are plane.

5. The connector for connecting pipes of different diameters according to claim 1, wherein: Two interface channels are provided in the connector body, the two interface channels are respectively connected to the opposite ends of the communicating hole, and the fixing components are both provided in the two interface channels.

6. The connector for connecting pipes of different diameters according to claim 1, wherein: The locking nut includes a cap body and a flange protruding from the outer peripheral wall of the cap body at one end away from the communicating hole. The end of the cap body away from the flange is inserted into the interface channel and threadedly connected to the threaded section; the avoidance hole passes through the cap body along the axial direction of the cap body.

7. The connector for connecting pipes of different diameters according to claim 1, wherein: The side surface of the pressing block facing the inserting channel is a concave arc surface.

8. The connector for connecting pipes of different diameters according to claim 1, wherein: The interface channel includes a connecting portion and an interface portion. The first inclined surface is arranged to form the connecting portion so that the cross-sectional area of the connecting portion gradually increases in the direction away from the connecting hole. The connecting portion connects the connecting hole and the interface portion; the interface portion passes through the outer side surface of the connector body, and an internal thread is provided on the inner peripheral wall of the interface portion to constitute the threaded section.

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