Wax-proof hanging wall and sand deposition prevention device and thick oil gathering and transportation system

Abstract

The present application relates to oil and gas transportation technical field, provide a kind of waxing and sand deposition device and thick oil gathering and transportation system are prevented from hanging wall.The waxing and sand deposition device prevented from hanging wall includes pipeline body, first separator, second separator, cyclone generating structure and closure mechanism;Pipeline body is provided with sand hole;First separator and second separator divide pipeline body into cyclone chamber, main conveying chamber and deposition chamber, deposition chamber is communicated with sand hole, first separator is provided with communication hole, and second separator is provided with sand leakage part;Cyclone generating structure is used to form cyclone in cyclone chamber;Closure mechanism is suitable for switching between the first state of plugging sand hole and the second state of opening sand hole.The waxing and sand deposition device prevented from hanging wall provided by the present application can achieve good waxing and sand deposition effect without stopping, ensure long-period stable operation of gathering pipeline, improve thick oil conveying efficiency of gathering system, and have the advantages of small energy consumption and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas transportation, and particularly relates to a device for preventing wax walling and sand deposition and a heavy oil gathering and transportation system. BACKGROUND

[0002] Heavy oil reservoirs are widely distributed in China, and the reserves of heavy oil are much more than those of light oil resources. Therefore, the exploration and development of heavy oil is an inevitable trend for oilfield enterprises.

[0003] The development and transportation of heavy oil are difficult due to its large burial depth, high viscosity and strong corrosion. The wax content of crude oil in most heavy oil reservoirs is about 5%, and the heavy oil reservoirs are mainly distributed in sandstone reservoirs, which leads to serious sand content in the produced heavy oil.

[0004] During the transportation of heavy oil in a gathering and transportation pipeline, wax walling occurs on the pipe wall, especially on the top of the pipeline, and sand deposition occurs on the bottom of the pipeline. When the wax walling and sand deposition accumulate to a certain extent, the pipe diameter is sharply reduced, the friction along the pipeline is increased, the pipeline capacity is reduced, and the pressure requirement of the pipeline is increased. This not only consumes a large amount of energy, but also increases the probability of pipeline accidents.

[0005] In view of the serious energy consumption and safety problems caused by wax walling and sand deposition in the gathering and transportation system, the traditional methods usually adopt physical cleaning and chemical cleaning methods. The physical cleaning generally adopts pig, high-pressure water jet and mechanical scraping to remove impurities on the surface of the pipeline. The chemical cleaning adopts one or more chemical agents or their aqueous solutions to remove impurities on the surface of the pipeline. However, these methods need to be stopped for cleaning, consume a large amount of energy and have high cost, which does not meet the goal of energy saving and emission reduction, and has a great impact on oilfield production. The methods of increasing the pipeline temperature, mixing with light oil and adding demulsifiers have little effect on solving the problems of wax walling and sand deposition.

[0006] Therefore, there is an urgent need for a safe, economical and efficient heavy oil transportation device to inhibit the accumulation of wax on the top of the pipeline and prevent the accumulation of sand on the bottom of the pipeline during the transportation of heavy oil, so as to ensure the long-period stable operation of the gathering and transportation pipeline and improve the efficiency of heavy oil transportation in the gathering and transportation system. SUMMARY

[0007] The present application provides a device for preventing wax walling and sand deposition and a heavy oil gathering and transportation system to solve the problem that the methods for solving the problems of wax walling and sand deposition in the prior art need to be stopped for cleaning, consume a large amount of energy and have high cost.

[0008] The present application provides a device for preventing wax walling and sand deposition, comprising:

[0009] A pipe body, a sidewall of the pipe body is provided with a sand discharge hole;

[0010] A first partition and a second partition are arranged in the pipe body, the first partition and the second partition divide the inner cavity of the pipe body into a cyclone cavity, a main conveying cavity and a deposition cavity arranged radially along the pipe body, the deposition cavity is communicated with the sand discharge hole, the first partition is provided with a communication hole communicated with the cyclone cavity and the main conveying cavity, and the second partition is provided with a sand leakage part communicated with the main conveying cavity and the deposition cavity.

[0011] A cyclone generating structure is arranged in the cyclone cavity and used for forming a cyclone in the cyclone cavity.

[0012] A closing mechanism is movably arranged outside the pipe body, and the closing mechanism is adapted to be switched between a first state of blocking the sand discharge hole and a second state of opening the sand discharge hole.

[0013] According to the wax deposition prevention and sand deposition prevention device provided by the application, the closing mechanism comprises a closing plate, one side of the closing plate is an arc surface matched with the outer wall of the pipe body, the closing plate is a magnetic attraction device, the closing plate is attracted to the pipe body, and the closing plate is adapted to slide along the outer wall of the pipe body to switch between the first state and the second state.

[0014] According to the wax deposition prevention and sand deposition prevention device provided by the application, the closing mechanism further comprises a sealing part fixedly arranged on one side of the arc surface of the closing plate.

[0015] According to the wax deposition prevention and sand deposition prevention device provided by the application, the closing mechanism further comprises a handle fixedly connected with the closing plate.

[0016] According to the wax deposition prevention and sand deposition prevention device provided by the application, the cyclone generating structure comprises a first spiral blade and a second spiral blade, and the first spiral blade and the second spiral blade are oppositely arranged on two sides of the cyclone cavity.

[0017] According to the wax deposition prevention and sand deposition prevention device provided by the application, the first spiral blade and the second spiral blade are respectively arranged with a plurality of intervals along the axial direction of the pipe body.

[0018] According to the wax deposition prevention and sand deposition prevention device provided by the application, the second partition is provided with a plurality of sedimentation blocks on one side of the main conveying cavity, the plurality of sedimentation blocks are arranged with intervals along the axial line of the pipe body, and the sand leakage part and the sedimentation blocks are alternately arranged.

[0019] According to the application, the settling block is a prismatic structure with the cross-sectional size gradually increasing from the end far away from the second partition to the end close to the second partition.

[0020] According to the application, the device further comprises:

[0021] The exhaust hole is arranged on the side wall of the pipeline body and communicates with the cyclone cavity.

[0022] The control valve is arranged on the exhaust hole.

[0023] The application further provides a heavy oil gathering and transferring system comprising the device.

[0024] The device provided by the application can achieve good effects of preventing wax from sticking to the wall and preventing sand from depositing without stopping the transferring, which is beneficial to the stability of the transferring and ensures the long-period stable operation of the gathering and transferring pipeline, improves the heavy oil transferring efficiency of the gathering and transferring system, and has the advantages of small energy consumption and low cost.

[0025] Further, the heavy oil gathering and transferring system comprising the device also has the above advantages. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0027] Figure 1 is a cross-sectional view of the device provided by the application;

[0028] Figure 2 is a three-dimensional schematic view of the internal structure of the main conveying pipe of the device provided by the application (the connecting flange is hidden in the figure);

[0029] Figure 3It is an end view of the internal structure of the main conveying pipe of the wax-preventing and sand-preventing device provided by the application (the connecting flange is hidden in the figure);

[0030] Figure 4 It is a schematic view of the cooperation structure between the closing mechanism and the pipe body of the wax-preventing and sand-preventing device provided by the application;

[0031] Figure 5 It is a structural schematic view of the heavy oil conveying system provided by the application;

[0032] The reference signs are as follows: 1, inlet flange; 2, outlet flange; 3, cyclone cavity; 4, main conveying cavity; 5, deposition cavity; 6, cyclone generating structure; 7, first partition; 8, exhaust hole; 9, control valve; 10, sedimentation stop block; 11, second partition; 12, sand leakage piece; 13, sand discharge hole; 14, pipe body; 15, closing plate; 16, sealing piece; 17, handle; 18, well site; 19, valve group; 20, pump unit; 21, initial end flow meter; 22, pig launching cylinder; 23, initial end pressure gauge; 24, initial end temperature gauge; 25, undulating section pipe; 26, intermediate section pressure gauge; 27, intermediate pump unit; 28, intermediate section pipe; 29, terminal flow meter; 30, terminal temperature gauge; 31, terminal pressure gauge; 32, pig receiving cylinder; 33, joint station. DETAILED DESCRIPTION

[0033] The embodiments of the application will be further described in detail below with reference to the drawings and examples. The following examples are used to illustrate the application, but cannot be used to limit the scope of the application.

[0034] In the description of the embodiments of the application, it should be noted that the terms “center”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the application. In addition, the terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected, it can be mechanically connected, or electrically connected, it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] In the embodiments of the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0037] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0038] The following will be described in conjunction with Figures 1 to 4 The wax hanging and sand deposition prevention device of the embodiments of the present application is described, which comprises a pipeline body 14, a first partition 7, a second partition 11, a cyclone generating structure 6 and a sealing mechanism.

[0039] The two ends of the pipeline body 14 are respectively provided with butt flanges, one of which is used as an inlet flange 1 and the other is used as an outlet flange 2. The wax hanging and sand deposition prevention device can be connected to other heavy oil conveying pipelines through the butt flanges at both ends of the pipeline body 14. The side wall of the pipeline body 14 is provided with a sand discharge hole 13, which is arranged along the radial direction of the pipeline body 14 and communicates with the inner cavity of the pipeline body 14.

[0040] Optionally, the length of the pipeline body 14 is between 5m and 1m, for example, can be 5m, 8m or 10m, the length of the pipeline body 14 increases with the increase of the wax content and the sand content of the heavy oil, and the length of the pipeline body 14 and the corresponding relationship of the wax content and the sand content of the heavy oil can be specifically referred to Table 1:

[0041]

[0042] Table 1

[0043] The first partition 7 and the second partition 11 are plate-shaped structures, and the first partition 7 and the second partition 11 are oppositely arranged in the pipeline body 14. The first partition 7 and the second partition 11 extend from one end of the pipeline body 14 to the other end of the pipeline body 14, and the two sides of the first partition 7 and the second partition 11 are fixedly connected with the inner wall of the pipeline body 14. The first partition 7 and the second partition 11 divide the inner cavity of the pipeline body 14 into the cyclone cavity 3, the main conveying cavity 4 and the deposition cavity 5 arranged radially along the pipeline body 14. The deposition cavity 5 is communicated with the sand discharge hole 13. The first partition 7 is provided with a communication hole communicating the cyclone cavity 3 and the main conveying cavity 4, and the second partition 11 is provided with a sand leakage piece 12 communicating the main conveying cavity 4 and the deposition cavity 5.

[0044] The cyclone generating structure 6 is arranged in the cyclone cavity 3 and is used for forming a cyclone in the cyclone cavity 3. The closing mechanism is movably arranged outside the pipeline body 14, and the closing mechanism is adapted to be switched between a first state of blocking the sand discharge hole 13 and a second state of opening the sand discharge hole 13.

[0045] According to the wax deposition prevention and sand deposition prevention device of the embodiment of the present application, in the process of conveying the heavy oil, the cyclone cavity 3 is located at the upper side, the deposition cavity 5 is located at the lower side, the heavy oil enters the cyclone cavity 3, the main conveying cavity 4 and the deposition cavity 5 from one end of the pipeline body 14 at the same time, the heavy oil in the cyclone cavity 3 spirally flows under the action of the cyclone generating structure 6, the heavy oil is thrown to the top of the pipeline body 14 and the first partition 7 under the action of the centrifugal force, and the first partition 7 plays a scouring role, so that the wax and the heavy oil are not easy to be deposited on the wall. In the embodiment, the first partition 7 can separate the cyclone cavity 3 and the main conveying cavity 4, reduce the disturbance of the spiral flow at the upper side to the flow of the heavy oil in the main conveying cavity 4, and reduce the energy loss of conveying.

[0046] The first partition 7 is provided with a communication hole, which can be used for allowing the sand to fall from the cyclone cavity 3 into the main conveying cavity 4. The communication hole is provided with a plurality of communication holes, and the plurality of communication holes are uniformly and spacedly arranged on the first partition. In the embodiment, the diameter of the communication hole is between 2mm and 13mm, and can be 2mm, 4mm, 8mm or 13mm, so as to adapt to different sand particle sizes. When the diameter of the communication hole is selected, it can be determined according to the sand particle size range in the heavy oil, and the corresponding relationship between the diameter of the communication hole of the first partition 7 and the sand particle size is shown in Table 2:

[0047]

[0048]

[0049] Table 2

[0050] In some embodiments of the present application, the cyclone generating structure 6 comprises a first spiral blade and a second spiral blade, the first spiral blade and the second spiral blade are oppositely arranged on both sides of the cyclone cavity 3. Through the oppositely arranged first spiral blade and second spiral blade, the heavy oil can be flushed towards the upper side and the lower side respectively, so as to achieve a better flushing effect.

[0051] Optionally, the first spiral blade and the second spiral blade are spaced apart along the axial direction of the pipeline body 14. Further, the first spiral blade and the second spiral blade are alternately arranged. Thus, not only a good flushing effect can be achieved, but also compared with the continuous arrangement of the spiral structure, the present scheme can reduce the energy loss of the heavy oil transportation.

[0052] Optionally, the blade angle of the first spiral blade and the second spiral blade is between 25° and 75°, and can be 25°, 45° or 75°. The blade angle of the first spiral blade and the second spiral blade increases with the increase of the viscosity of the heavy oil.

[0053] Optionally, the spacing between the first spiral blade and the second spiral blade is between 0.2mm and 0.8mm, and can be 0.2mm, 0.5mm or 0.8mm. The spacing between the first spiral blade and the second spiral blade decreases with the increase of the viscosity of the heavy oil.

[0054] The corresponding relationship between the blade angle and the spacing of the first spiral blade and the second spiral blade and the properties of the heavy oil is shown in Table 3:

[0055] Class Viscosity / mPa.s Blade angle / ° Distance per blade group / m Ordinary heavy oil 50-1000 25 0.8 Extra heavy oil 10000-50000 45 0.5 Super heavy oil >50000 75 0.2

[0056] Table 3

[0057] In some embodiments of the present application, the wax prevention and wall hanging and sand deposition prevention device further comprises an exhaust hole 8 and a control valve 9, the exhaust hole 8 is arranged on the side wall of the pipeline body 14 and communicates with the cyclone cavity 3, and the control valve 9 is arranged on the exhaust hole 8. Through the exhaust hole 8, the light hydrocarbon accumulated in the cyclone cavity 3 can be discharged. The control valve 9 can control the opening and closing of the exhaust hole 8. Optionally, the control valve 9 adopts a pressure relief valve, which can automatically relieve pressure when the internal pressure is greater than the relief pressure.

[0058] In the embodiment of the present application, the sand in the cyclone cavity 3 can fall into the main conveying cavity 4 through the communication hole, and under the action of gravity, the sand continues to deposit downward, and the sand carried by the thick oil in the main conveying cavity 4 flows forward with the thick oil in the main conveying cavity 4, gradually deposits on the second partition 11, and falls into the deposition cavity 5 through the sand leakage piece 12, which can effectively avoid the blockage of the main conveying cavity 4 caused by the deposition of sand in the main conveying cavity 4.

[0059] Optionally, a plurality of sand leakage pieces 12 are arranged along the axial direction of the pipeline body 14, so as to ensure that the second partition 11 has good sand leakage capacity at each position along the axial direction of the pipeline body 14.

[0060] Optionally, the sand leakage piece 12 comprises a cylindrical hole section and a conical hole section, wherein one end of the cylindrical hole section is connected to the main conveying cavity 4, the other end is connected to the large-diameter end of the conical hole section, and the small-diameter end of the conical hole section is connected to the deposition cavity 5. The cylindrical hole section of the sand leakage piece 12 has a large opening, which is convenient for the deposition of sand, and the conical hole has a funnel structure with a taper angle of 30° to 60°, which is convenient for the rapid settlement of sand to the deposition cavity 5 below.

[0061] In some embodiments of the present application, a plurality of sedimentation blocks 10 are arranged on the side of the second partition 11 connected to the main conveying cavity 4, the sedimentation blocks 10 are arranged along the axial line of the pipeline body 14, and the sand leakage pieces 12 are arranged alternately with the sedimentation blocks 10. In the embodiment, during the forward flow of the sand with the thick oil, most of the sand flows in the lower part of the main conveying cavity 4 due to the action of gravity, collides with the sedimentation blocks 10 above the second partition 11 to slow down, and can be quickly deposited between the sedimentation blocks 10.

[0062] Optionally, the sedimentation block 10 has a prismatic structure with a gradually increasing cross-sectional size from the end far away from the second partition 11 to the end close to the second partition 11, so as to reduce the resistance of the sedimentation block 10 to the thick oil, thereby reducing the energy loss during the conveying of the thick oil, the inclined surface structure can increase the width of the sand falling channel formed between the sedimentation blocks 10, and can guide the sand, so as to easily collect the sand and easily make the sand slide to the sand leakage piece 12.

[0063] In combination with Figure 4In some embodiments of the present application, the closing mechanism comprises a closing plate 15, one side of the closing plate 15 is an arc surface matched with the outer wall of the pipeline body 14, the closing plate 15 is a magnetic attraction device, the closing plate 15 is attracted to the pipeline body 14, and the closing plate 15 is adapted to slide along the outer wall of the pipeline body 14 to switch between the first state and the second state. In this embodiment, the closing plate 15 can be an arc plate structure, when the closing plate 15 is attracted to the pipeline body 14, one side of the arc surface of the closing plate 15 is attached to the pipeline body 14, when the closing mechanism is in the first state, the closing plate 15 covers the sand discharge hole 13, and the sand discharge hole 13 is blocked, by sliding the closing plate 15, the closing mechanism is switched to the second state, at this time the sand discharge hole 13 is no longer blocked by the closing plate 15, and the sand in the sedimentation chamber 5 can be discharged through the sand discharge hole 13. It is worth noting that during the process of discharging the sand in the sedimentation chamber 5, only a small amount of thick oil is discharged with the sand because the sand is accumulated in the sedimentation chamber 5, and this process can be completed without stopping the delivery.

[0064] Optionally, the closing mechanism further comprises a handle 17, the handle 17 is fixedly connected with the closing plate 15. In this embodiment, the shape of the handle 17 is not limited, for example, it can be a block structure of any shape such as a rectangle, a square or a trapezoid, or it can be an “n” shaped frame structure. The handle 17 and the closing plate 15 are fixedly connected by welding or are integrally formed with the closing plate 15, so that they have good connection strength. By providing the handle 17, the sliding of the closing plate 15 is more convenient.

[0065] Optionally, the handle 17 is located at one end of the circumferential direction of the closing plate 15, and the handle 17 can rotate the closing plate 15 by a certain angle along the circumferential direction of the pipeline body to switch the state of the closing mechanism.

[0066] Optionally, the closing mechanism further comprises a sealing member 16, the sealing member 16 is fixedly arranged on one side of the arc surface of the closing plate 15, the sealing member 16 can be a ring-shaped gasket matched with the edge of the arc surface of the closing plate 15, or it can be a gasket matched with the entire arc surface of the closing plate 15, which is not limited here.

[0067] The above scheme only exemplarily introduces an optional form of the closing mechanism, and in some other forms, the closing plate 15 in the closing mechanism can be connected with the pipeline body 14 by clamping or hinging.

[0068] For example, the hinged form, one side of the closure plate 15 is hinged with the pipeline body 14, the other side is detachable fixed through structure such as latch, the switching between the first state and the second state of the closing mechanism can be realized by rotating the closure plate 15. Further, the side of the closure plate 15 in contact with the pipeline body 14 is provided with an elastic protrusion corresponding to the sand hole 13, when the closure plate 15 is in contact with the pipeline body 14, the elastic protrusion is inserted into the sand hole 13, which has a better sealing effect on the sand hole 13.

[0069] As shown in Figure 5 The embodiment of the present application also provides a heavy oil gathering and transportation system, which comprises the wax and sand deposition prevention device.

[0070] Optionally, the heavy oil transportation system further comprises a well site 18, a valve group 19, a pump unit 20, a start-end flow meter 21, a fluctuation section pipeline 25, an intermediate pump unit 27, an intermediate section pipeline 28, a terminal flow meter 29 and a joint station 33 connected in sequence through pipelines, wherein at least one of the fluctuation section pipeline 25 and the intermediate section pipeline 28 is provided with the wax and sand deposition prevention device. Preferably, the fluctuation section pipeline 25 and the intermediate section pipeline 28 are respectively provided with at least one wax and sand deposition prevention device.

[0071] Optionally, the heavy oil transportation system further comprises a start-end pressure meter 23, a start-end temperature meter 24, an intermediate section pressure meter 26, a terminal temperature meter 30 and a terminal pressure meter 31.

[0072] Optionally, the heavy oil transportation system further comprises a pig launching cylinder 22 and a pig receiving cylinder 32, wherein the pig launching cylinder 22 is located upstream of the gathering and transportation system, and the pig receiving cylinder 32 is located downstream of the gathering and transportation system.

[0073] It is worth noting that all the pipeline positions of the heavy oil transportation system can adopt the wax and sand deposition prevention device, preferably, the heavy oil transportation system connects the wax and sand deposition prevention device into the area where the wax and sand deposition is prone to occur through the butt flange, so as to reduce the use cost while achieving good wax and sand deposition prevention effect.

[0074] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for preventing wax buildup and sand deposition, characterized in that, include: The pipe body has sand discharge holes on its side wall; A first partition and a second partition are disposed within the pipe body. The first partition and the second partition divide the inner cavity of the pipe body into a swirling cavity, a main conveying cavity, and a sedimentation cavity arranged radially from top to bottom along the pipe body. The sedimentation cavity is connected to the sand discharge hole. The first partition is provided with a connecting hole connecting the swirling cavity and the main conveying cavity. The second partition is provided with a sand leakage device connecting the main conveying cavity and the sedimentation cavity. A swirl generation structure is disposed within the swirl cavity to generate a swirl within the swirl cavity; as well as A sealing mechanism is movably disposed on the outside of the pipe body, and the sealing mechanism is adapted to switch between a first state of blocking the sand discharge hole and a second state of opening the sand discharge hole; The swirl generating structure includes a first helical blade and a second helical blade, with the first helical blade and the second helical blade disposed opposite each other on both sides of the swirl cavity; The first helical blade and the second helical blade are respectively arranged in multiples at intervals along the axial direction of the pipe body; The second separator is provided with multiple settling blocks on one side of the main conveying chamber. The multiple settling blocks are arranged at intervals along the axis of the pipe body. The sand-leaking component is alternately arranged with the settling blocks. The settlement block is a frustum structure with a cross-sectional dimension that gradually increases from the end furthest from the second separator to the end closest to the second separator; The device also includes: An exhaust port is provided on the side wall of the pipe body and communicates with the vortex chamber; A control valve is located at the exhaust port.

2. The anti-wax wall adhesion and anti-sand deposition device according to claim 1, characterized in that, The sealing mechanism includes a sealing plate, one side of which is an arc-shaped surface adapted to the outer wall of the pipe body. The sealing plate is a magnetic attraction device, which is attached to the pipe body and is adapted to slide along the outer wall of the pipe body to switch between the first state and the second state.

3. The anti-wax wall adhesion and anti-sand deposition device according to claim 2, characterized in that, The sealing mechanism also includes a sealing element, which is fixedly disposed on one side of the arc-shaped surface of the sealing plate.

4. The anti-wax wall adhesion and anti-sand deposition device according to claim 2 or 3, characterized in that, The closure mechanism also includes a handle, which is fixedly connected to the closure plate.

5. A heavy oil gathering and transportation system, characterized in that, Includes the anti-wax wall adhesion and anti-sand deposition device as described in any one of claims 1 to 4.

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