A nanometer composite mud circulating device for underground pipeline construction

Abstract

This application relates to the field of mud pump technology, and more particularly to a nanocomposite mud circulation device for underground pipeline construction, comprising: a mud supply pipe, a mud pump, and a screen desander. The screen desander is used for mud filtration. During operation, the mud pump draws the mud to be filtered and injects it into the screen desander through the mud supply pipe. The screen mesh of the screen desander's filter element has a larger pore size than the soil particle size; therefore, during filtration, the nanocomposite particles penetrate the filter mesh, while the soil particles in the mud remain trapped inside the filter element due to their large size. The filtered mud is pumped out through the desander outlet and circulated to the horizontal directional drilling rig. The soil particles inside the rig are discharged through a soil discharge butterfly valve at the soil discharge outlet. The nanocomposite mud pump of this application has a compact layout and can achieve the filtration and circulation supply of nanocomposite mud in horizontal directional drilling projects with limited construction space.

Description

Technical Field

[0001] This application relates to the field of mud pump technology, and more particularly to a nanocomposite mud circulation device for underground pipeline construction. Background Technology

[0002] A horizontal directional drilling rig is a type of engineering machinery used for underground pipeline laying. It can excavate underground pipelines without breaking through the surface.

[0003] Horizontal directional drilling rigs are equipped with drill rods, which traverse soil layers under the drive of the feed mechanism. The drill bit on the drill rod is equipped with mud ejection holes, which spray mud onto the drill bit for cooling. The drill rod is also equipped with mud return holes, through which the mud circulation system recovers mud for recirculation.

[0004] Adding nanocomposite materials to drilling mud can enhance its lubrication, reduce drill bit friction, and extend drill bit life. However, the mud recovered through the mud return hole contains a large amount of soil debris, which needs to be filtered out before being recycled to the drill pipe.

[0005] Existing mud circulation systems require the excavation of large mud storage tanks at the work site to store filtered mud, and also require the installation of large cyclone desanders for filtering soil debris. For example, there is a mud circulation device for trenchless horizontal directional drilling with patent number CN218474948U.

[0006] However, deploying mud circulation systems in narrow urban streets often faces the problem of limited space.

[0007] Therefore, in order to perform mud circulation for horizontal directional drilling rigs in a compact working space, this application provides a nanocomposite mud circulation device for underground pipeline construction. Utility Model Content

[0008] To overcome the problems existing in the related technologies, this application provides a nanocomposite mud circulation device for underground pipeline construction, including: a mud supply pipe, a mud pump, and a filter screen for sand removal;

[0009] The mud pump transports mud to the screen desander through the mud supply pipe;

[0010] The filter screen sand remover also includes a sand removal tank, a sand removal filter element, and a soil and slag discharge butterfly valve. The sand removal tank is provided with a sand remover inlet, a sand remover outlet, and a soil and slag discharge outlet.

[0011] The sand separator inlet and the sand separator outlet are located at the top of the sand separator tank, the soil discharge outlet is located at the bottom of the sand separator tank, and the soil discharge butterfly valve is located inside the soil discharge outlet.

[0012] The sand removal filter element is a cylindrical filter element. The two openings on both ends of the sand removal filter element in the axial direction respectively abut against and connect to the liquid inlet of the sand remover and the soil discharge outlet. The pore size of the sand removal filter element is smaller than the particle size of the soil and larger than the particle size of the nanocomposite particles.

[0013] In one embodiment, the mud pump is provided with a mud pump inlet and a mud pump outlet;

[0014] The mud supply pipe is sequentially connected to the mud pump inlet, the mud pump outlet, the desander inlet, and the desander outlet.

[0015] In one embodiment, the mud pump is a reciprocating piston pump.

[0016] In one embodiment, it further includes: a drive motor; the drive motor is connected to the mud pump via a belt pulley.

[0017] In one embodiment, the mud pump is further provided with a driven pulley, and the drive motor is provided with a driving pulley;

[0018] The driving pulley and the driven pulley are connected by a belt, and the diameter of the driven pulley is larger than that of the driving pulley.

[0019] In one embodiment, the slag discharge butterfly valve is equipped with a hydraulic drive cylinder, which is used to drive the slag discharge butterfly valve to open and close.

[0020] In one embodiment, a sealing rubber gasket is provided between the sand removal tank and the sand removal filter element.

[0021] In one embodiment, it further includes: a base; the drive motor and the mud pump are mounted on the base.

[0022] The technical solution provided in this application may include the following beneficial effects:

[0023] The nanocomposite mud circulation device of this application filters the mud using a screen desander. A mud pump draws the mud to be filtered and injects it into the screen desander through a mud supply pipe. The screen mesh of the screen desander's filter element has a larger pore size than the soil particles. Therefore, during filtration, the nanocomposite particles penetrate the screen, while the soil particles in the mud remain trapped inside the filter element due to their large size. The filtered mud is pumped out through the outlet of the desander and circulated to the horizontal directional drilling rig. The soil particles inside the rig are discharged through a soil discharge butterfly valve at the soil discharge outlet. The nanocomposite mud circulation device of this application has a compact layout and can achieve the filtration and circulation of nanocomposite mud in horizontal directional drilling projects with limited construction space.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0025] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the nanocomposite mud circulation device shown in the embodiments of this application;

[0027] Figure 2 This is a front view of the nanocomposite mud circulation device shown in the embodiment of this application;

[0028] Figure 3 This is an exploded view of the filter screen desander of the nanocomposite mud circulation device shown in the embodiments of this application;

[0029] Figure labeling: 100, mud pump; 101, driven pulley; 102, mud pump inlet; 200, sand separator; 201, sand separator filter element; 202, soil discharge butterfly valve; 2021, hydraulic drive cylinder; 203, sand separator tank; 2031, sand separator inlet; 2032, sand separator outlet; 2033, soil discharge outlet; 300, drive motor; 301, drive pulley; 400, base. Detailed Implementation

[0030] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0031] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] Since the flow rate of solid-liquid separation devices is usually lower than that of mud pumps, and solid-liquid separation devices are difficult to integrate into mud supply pipelines, existing mud circulation systems usually set up mud storage tanks to separate mud filtration into independent processes.

[0034] In narrow urban streets, there is often a problem of limited working space, and there is often not enough space to set up a mud circulation tank.

[0035] To facilitate mud circulation for horizontal directional drilling rigs in confined working spaces, embodiments of this application provide a nanocomposite mud circulation device for underground pipeline construction, such as... Figure 1 and Figure 2 As shown, it includes a mud supply pipe, a mud pump 100, and a screen desander 200.

[0036] Specifically, the mud pump 100 is provided with a mud pump inlet 102 and a mud pump outlet. The filter screen desander 200 is provided with a desander inlet 2031, a desander outlet 2032, and a soil discharge outlet 2033. The mud supply pipe is sequentially connected to the mud pump inlet 102, the mud pump outlet, the desander inlet 2031, and the desander outlet 2032.

[0037] Understandably, the mud supply pipe is used to transport mud between the mud pump 100, the screen desander 200, and the horizontal directional drilling rig. The mud pump 100 draws nanocomposite mud to the drill rod of the horizontal directional drilling rig, and then draws nanocomposite mud containing soil debris from the borehole into the screen desander 200. After filtration by the screen desander 200, the nanocomposite mud is circulated back to the drill rod of the horizontal directional drilling rig.

[0038] Preferably, the sand separator outlet 2032 of the filter sand separator 200 can also be connected to a mud storage tank, which is used for water injection and the addition of nanocomposite particles.

[0039] For the filtration treatment of nanocomposite mud, such as Figure 3 As shown, the filter screen sand remover 200 also includes a sand removal tank 203, a sand removal filter element 201, and a soil and slag discharge butterfly valve 202.

[0040] Specifically, the sand separator inlet 2031 and the sand separator outlet 2032 are located at the top of the sand separator tank 203, the soil discharge outlet 2033 is located at the bottom of the sand separator tank 203, and the soil discharge butterfly valve 202 is located inside the soil discharge outlet 2033.

[0041] The sand removal filter element 201 is a cylindrical filter element, which is a hollow cylindrical body. The top and bottom ends of the sand removal filter element 201 in the axial direction respectively abut against the sand remover inlet 2031 and the soil discharge outlet 2033 of the sand removal tank 203.

[0042] It is understood that the particle size of the soil residue is larger than the pore size of the cylindrical filter element, while the particle size of the nanoparticles is smaller than the pore size of the cylindrical filter element.

[0043] The slurry to be filtered is injected into the inner space of the cylindrical filter element. The slurry is filtered through the cylinder wall, and the inner space is sealed by sealing rubber gaskets at both ends. Nanocomposite particles and water pass through the filter holes on the cylindrical filter element, while soil residue is retained in the inner space.

[0044] The soil discharge butterfly valve 202 is driven by a hydraulic drive cylinder 2021. When the soil discharge butterfly valve 202 is opened, the soil in the cylinder space flows out from the soil discharge outlet.

[0045] Specifically, the hydraulically driven cylinder is powered by a hydraulic pump.

[0046] Preferably, the switching control of the hydraulic drive cylinder can be automatically controlled by a circuit board, or it can be manually controlled by a manual switch.

[0047] Furthermore, the drive motor 300 is connected to the mud pump via a pulley drive. The mud pump is also provided with a driven pulley 101, and the drive motor 300 is provided with a driving pulley 301; the driving pulley 301 and the driven pulley 101 are connected by a belt, and the diameter of the driven pulley 101 is larger than that of the driving pulley 301.

[0048] In this embodiment of the application, in order to increase the output torque of the drive motor 300, the mud pump and the drive motor 300 are driven by a belt pulley, and the diameter of the driven belt pulley 101 of the mud pump is larger than the diameter of the driving belt pulley 301.

[0049] Specifically, the mud pump 100 is a reciprocating piston pump. The reciprocating piston pump is equipped with a piston, cylinder, suction valve, and discharge valve. It can be understood that the suction valve and discharge valve are respectively located at the mud pump suction port 102 and the mud pump discharge port.

[0050] In this embodiment, the nanocomposite mud circulation device further includes a base 400. The mud pump and the drive motor 300 are fixed to the base 400 by a support frame.

[0051] Specifically, in the sand removal tank 203 of the sand removal device 200, sealing rubber gaskets are respectively provided at the top and bottom of the sand removal filter element 201. The sealing rubber gaskets are sandwiched between the top inner wall of the sand removal tank 203 and the sand removal filter element 201, and between the bottom inner wall of the sand removal tank 203 and the sand removal filter element 201.

[0052] In this embodiment, the nanocomposite mud circulation device filters the mud using a screen desander 200. A mud pump 100 draws the mud to be filtered and injects it into the screen desander 200 through a mud supply pipe. The mesh size of the desander filter element 201 in the screen desander 200 is larger than the particle size of the soil particles. Therefore, during filtration, the nanocomposite particles penetrate the mesh of the desander filter element 201, while the soil particles in the mud remain trapped inside the filter element 201 due to their large size. The filtered mud is pumped out through the desander outlet 2032 and circulated to the horizontal directional drilling rig. The soil particles inside the cylinder are discharged through the soil discharge butterfly valve 202 in the soil discharge outlet 2033.

[0053] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A nanocomposite mud circulation device for underground pipeline construction, characterized in that, include: Mud supply pipe, mud pump (100) and screen desander (200); The mud pump (100) transports mud to the screen desander (200) through the mud supply pipe; The filter screen sand remover (200) also includes a sand removal tank (203), a sand removal filter element (201), and a soil discharge butterfly valve (202). The sand removal tank (203) is provided with a sand remover inlet (2031), a sand remover outlet (2032), and a soil discharge outlet (2033). The desander inlet (2031) and desander outlet (2032) are located at the top of the desander tank (203), the slag outlet (2033) is located at the bottom of the desander tank (203), and the slag discharge butterfly valve (202) is located inside the slag discharge outlet (2033). The sand removal filter element (201) is a cylindrical filter element. The two ends of the sand removal filter element (201) in the axial direction respectively abut against and connect to the liquid inlet (2031) of the sand remover and the soil discharge outlet (2033). The pore size of the sand removal filter element (201) is smaller than the particle size of the soil residue but larger than the particle size of the nanocomposite particles.

2. The nanocomposite mud circulation device for underground pipeline construction according to claim 1, characterized in that, The mud pump (100) is provided with a mud pump inlet (102) and a mud pump outlet; The mud supply pipe is connected in sequence to the mud pump inlet (102), the mud pump outlet, the desander inlet (2031), and the desander outlet (2032).

3. The nanocomposite mud circulation device for underground pipeline construction according to claim 1, characterized in that, The mud pump (100) is a reciprocating piston pump.

4. A nanocomposite mud circulation device for underground pipeline construction according to claim 3, characterized in that, Also includes: Drive motor (300); The drive motor (300) is connected to the mud pump (100) via a belt pulley.

5. A nanocomposite mud circulation device for underground pipeline construction according to claim 4, characterized in that, The mud pump (100) is also provided with a driven pulley (101), and the drive motor (300) is provided with a driving pulley (301). The driving pulley (301) and the driven pulley (101) are connected by a belt, and the diameter of the driven pulley (101) is larger than that of the driving pulley (301).

6. A nanocomposite mud circulation device for underground pipeline construction according to claim 1, characterized in that, The slag discharge butterfly valve (202) is equipped with a hydraulic drive cylinder (2021), which is used to drive the slag discharge butterfly valve (202) to open and close.

7. A nanocomposite mud circulation device for underground pipeline construction according to claim 1, characterized in that, A sealing rubber gasket is provided between the sand removal tank (203) and the sand removal filter element (201).

8. A nanocomposite mud circulation device for underground pipeline construction according to claim 5, characterized in that, Also includes: Base (400); The drive motor (300) and the mud pump (100) are mounted on the base (400).

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