Electric heating double-pipe thermal recovery wellhead device with cleaning mechanism

Abstract

The invention relates to the technical field of oil exploitation, and discloses an electric heating double-pipe thermal recovery wellhead device with a cleaning mechanism, the electric heating double-pipe thermal recovery wellhead device with the cleaning mechanism comprises a base, the outer side of the base is fixedly provided with a bottom cylinder, and the outer side of the bottom cylinder is fixedly provided with a connecting cylinder; the oil extraction pipe is clamped and mounted on the outer side of the connecting cylinder, one end of a straight pipe is fixedly mounted on the outer side of the connecting cylinder, and a square connecting box is fixedly mounted at the other end of the straight pipe. According to the electric heating double-pipe thermal recovery wellhead device with the cleaning mechanism, in order to reduce formation of sediments in crude oil and improve the fluidity of the crude oil, the stirring assembly is arranged, the assembly is matched with a top motor to start, and therefore a turbine fan and a round rod start to rotate; therefore, a driving bevel gear and a driven bevel gear are matched to enable a cross rod to start to rotate, so that a stirring paddle starts to rotate, the petroleum is quickly stirred, sediments in the crude oil are reduced, and the liquidity of the crude oil is improved.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum extraction, in particular to an electrically heated double-tube thermal extraction wellhead device with a cleaning mechanism. Background Art

[0002] The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism is designed to solve the problems of wax deposition, blockage, and difficulty in cleaning and maintenance of the wellhead device during heavy oil production. The device integrates electric heating and automatic cleaning functions to improve oil production efficiency and reduce maintenance costs.

[0003] This electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism has a compact structure and is mainly composed of a wellhead heat pipe, an electric heating system, an automatic cleaning mechanism and a control system. In terms of working principle, the electric heating system heats the wellhead heat pipe through preset temperature control to maintain a constant wellhead temperature and prevent the thick oil from solidifying. At the same time, the automatic cleaning mechanism uses a robotic arm or high-pressure water jet to regularly clean the wellhead to effectively remove wax deposits and impurities.

[0004] However, in actual use of the above equipment, most of the traditional devices will produce sediment when collecting crude oil, and it is cumbersome to clean the device. In view of this, we propose an electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism. Summary of the invention

[0005] The object of the present invention is to provide an electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism, comprising a base, a bottom cylinder is fixedly installed on the outside of the base, a connecting cylinder is fixedly installed on the outside of the bottom cylinder, an oil production pipe is clamped and installed on the outside of the connecting cylinder, one end of a straight pipe is fixedly installed on the outside of the connecting cylinder, a square connecting box is fixedly installed on the other end of the straight pipe, an oil production pipe is clamped and installed on the outside of the square connecting box, a stirring assembly, a cleaning assembly and a flushing assembly are arranged on the outside of the base, and the stirring assembly comprises:

[0007] A short column, one end of the short column is fixedly mounted on the outside of the square connection box, a top motor is fixedly mounted on the outside of the short column, and a turbofan is fixedly mounted on the output end of the top motor;

[0008] A round rod, one end of the round rod is fixedly mounted on the output end of the top motor, one end of a thin rod is fixedly mounted on the other end of the round rod, a straight rod is fixedly mounted on the other end of the thin rod, and one end of a support column is fixedly mounted on the inner side of the square connection box;

[0009] A protective cylinder is fixedly installed on the other end of the support column, a driving bevel gear is fixedly installed on the outside of the thin rod, a cross bar is rotatably installed on the outside of the protective cylinder, a driven bevel gear is fixedly installed on one end of the cross bar, and a stirring paddle is fixedly installed on the other end of the cross bar.

[0010] Preferably, the oil production pipe, short column, cross bar, driven bevel gear and stirring paddle are arranged in multiple groups, and the multiple groups of oil production pipe, cross bar, driven bevel gear and stirring paddle are mirrored on the outside of the square connecting box with the vertical center line of the front and rear direction of the square connecting box as the mirror axis, and the multiple groups of short columns are linearly arrayed with equal intervals at the four corners of the top motor.

[0011] Preferably, a plurality of groups of the driven bevel gears are meshed with the driving bevel gears, and the stirring paddles are arranged in the oil production pipe, thereby achieving a supporting effect.

[0012] Preferably, the cleaning assembly includes straight bristles, a straight brush is fixedly mounted on the outside of the straight rod, a straight cylinder is fixedly mounted on the outside of the straight rod, one end of a thick spring is fixedly mounted on the inside of the straight cylinder, one end of a thick rod is fixedly mounted on the other end of the thick spring, a scraper is fixedly mounted on the other end of the thick rod, and the thick rod is slidably mounted in the straight cylinder.

[0013] Preferably, the straight bristles, straight tubes, thick springs, thick rods and scrapers are provided in multiple groups, and the multiple groups of straight bristles, straight tubes, thick springs and thick rods are arranged in a linear array with equal spacing on the outside of the straight rod, and the multiple groups of straight tubes, thick springs, thick rods and scrapers are arranged in a circular array with equal spacing with the center of the circular cross-section of the straight rod as the center of the array.

[0014] Preferably, the straight bristles are arranged in a straight tube, and the straight tube, thick spring, thick rod and scraper are arranged in a connecting tube.

[0015] Preferably, the flushing assembly includes a sleeve, a sleeve is fixedly mounted on the outside of the straight rod, one end of a large spring is fixedly mounted on the inside of the sleeve, an outer cylinder is fixedly mounted on the other end of the large spring, one end of a circular filter plate is fixedly mounted on the outside of the outer cylinder, a cleaning brush is fixedly mounted on the other end of the circular filter plate, a heater is fixedly mounted on the outside of the bottom cylinder, a heat conduction pipe is fixedly mounted on the outside of the heater, a heat conduction block is fixedly mounted on the outside of the heat conduction pipe, one end of a support rod is fixedly mounted on the outside of the bottom cylinder, a bottom motor is fixedly mounted on the other end of the support rod, a bottom turbine is fixedly mounted on the output end of the bottom motor, a water inlet is provided on the outside of the bottom cylinder, a cover is clamped on the outside of the water inlet, a bottom filter plate is fixedly mounted on the bottom of the bottom cylinder, a slide groove is provided on the outside of the base, and a sliding filter plate is slidably mounted in the slide groove.

[0016] Preferably, the sleeve and the outer cylinder are elliptical, and the outer cylinder is slidably fitted on the inner side of the sleeve.

[0017] Preferably, the sliding filter plate is precisely fitted to the bottom of the bottom filter plate, and the filter holes of the sliding filter plate and the bottom filter plate have the same size.

[0018] Preferably, the heaters, heat pipes and support rods are provided in multiple groups.

[0019] Compared with the prior art, the present invention provides an electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism, which has the following beneficial effects:

[0020] 1. In order to reduce the formation of sediment in crude oil and improve the fluidity of crude oil, the electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism is provided with a stirring assembly, which cooperates with the starting top motor to rotate the turbine fan and the round rod, and cooperates with the driving bevel gear and the driven bevel gear to rotate the cross bar, so that the stirring paddle starts to rotate, so that the oil is quickly stirred, thereby reducing the sediment in the crude oil and improving the fluidity of the crude oil.

[0021] 2. In order to make the electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism have a better cleaning effect, a cleaning component is provided. The component cooperates with the starting top motor to drive the straight rod to start rotating, so that the straight brush bristles start to rotate, thereby cleaning the inside of the straight pipe. At the same time, the thick spring pushes the thick rod, so that the scraper fits precisely to the inside of the connecting tube, thereby improving the cleaning effect of the device.

[0022] 3. In order to further clean the inside of the device, the electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism is provided with a flushing component. The component cooperates with the top motor to drive the straight rod to rotate, and at the same time, the sleeve cooperates with the outer cylinder to drive the round filter plate to start rotating, so that the cleaning bristles start to clean the surface of the bottom filter plate, and at the same time cooperate with the heater, heat pipe and heat block to heat the crude oil, and cooperate with the moving sliding filter plate, so that the filter holes of the bottom filter plate and the sliding filter plate are staggered, so that the crude oil will not flow out, and then cooperate with the water inlet to inject water into the device for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic top view of the structure of the present invention as a whole;

[0024] Figure 2 It is a side cross-sectional schematic diagram of the structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0026] Figure 4 It is a schematic diagram of the structural cross section of the present invention;

[0027] Figure 5It is a schematic cross-sectional top view of the structure of the present invention;

[0028] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure of the middle B area;

[0029] Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure of the middle C area;

[0030] Figure 8 It is a bottom view schematic diagram of a partial structure of the present invention.

[0031] In the figure: 1, base; 2, bottom tube; 3, connecting tube; 4, oil production pipe; 5, straight tube; 6, square connecting box; 7, stirring assembly; 71, short column; 72, top motor; 73, turbofan; 74, round rod; 75, thin rod; 76, straight rod; 77, supporting column; 78, protective tube; 79, driving bevel gear; 710, cross bar; 711, driven bevel gear; 712, stirring paddle; 8, cleaning assembly; 81, straight bristles; 82, Straight cylinder; 83. thick spring; 84. thick rod; 85. scraper; 9. flushing assembly; 91. sleeve; 92. large spring; 93. outer cylinder; 94. round filter plate; 95. cleaning bristles; 96. heater; 97. heat pipe; 98. heat block; 99. support rod; 910. bottom motor; 911. bottom turbine; 912. water inlet; 913. cover; 914. bottom filter plate; 915. chute; 916. sliding filter plate. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, rather than all of the embodiments.

[0033] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of protection of this application.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0035] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0036] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] See also Figure 1-8 The present invention provides a technical solution: an electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism, comprising a base 1, a bottom tube 2 is fixedly installed on the outside of the base 1, a connecting tube 3 is fixedly installed on the outside of the bottom tube 2, an oil production pipe 4 is clamped and installed on the outside of the connecting tube 3, one end of a straight pipe 5 is fixedly installed on the outside of the connecting tube 3, a square connecting box 6 is fixedly installed on the other end of the straight pipe 5, the oil production pipe 4 is clamped and installed on the outside of the square connecting box 6, and a stirring component 7, a cleaning component 8 and a flushing component 9 are arranged on the outside of the base 1.

[0039] In one embodiment of the present invention, the stirring assembly 7 includes a short column 71, one end of the short column 71 is fixedly installed on the outside of the square connecting box 6, a top motor 72 is fixedly installed on the outside of the short column 71, a turbine fan 73 is fixedly installed on the output end of the top motor 72, one end of a round rod 74 is fixedly installed on the output end of the top motor 72, one end of a thin rod 75 is fixedly installed on the other end of the round rod 74, and a straight rod 76 is fixedly installed on the other end of the thin rod 75, one end of a supporting column 77 is fixedly installed on the inside of the square connecting box 6, a protective cylinder 78 is fixedly installed on the other end of the supporting column 77, an active bevel gear 79 is fixedly installed on the outside of the thin rod 75, a cross bar 710 is rotatably installed on the outside of the protective cylinder 78, a driven bevel gear 711 is fixedly installed on one end of the cross bar 710, and a stirring paddle 712 is fixedly installed on the other end of the cross bar 710, the oil production pipe 4, the short column 71, There are multiple groups of cross bars 710, driven bevel gears 711 and stirring paddles 712, and the multiple groups of oil production pipes 4, cross bars 710, driven bevel gears 711 and stirring paddles 712 are mirrored on the outside of the square connecting box 6 with the vertical center line of the front and rear direction of the square connecting box 6 as the mirror axis, and multiple groups of short columns 71 are linearly arrayed at equal intervals at the four corners of the top motor 72, multiple groups of driven bevel gears 711 are meshed with the active bevel gears 79, and the stirring paddles 712 are arranged in the oil production pipe 4, so as to achieve the supporting effect, cooperate with starting the top motor 72, so that the turbine fan 73 and the round rod 74 start to rotate, so that the active bevel gear 79 and the driven bevel gear 711 start to rotate the cross bar 710, so that the stirring paddle 712 starts to rotate, so that the oil is quickly stirred, thereby reducing the sediment in the crude oil and improving the fluidity of the crude oil.

[0040] In one embodiment of the present invention, the cleaning assembly 8 includes straight bristles 81, a straight brush 81 is fixedly installed on the outside of the straight rod 76, a straight tube 82 is fixedly installed on the outside of the straight rod 76, one end of a thick spring 83 is fixedly installed on the inside of the straight tube 82, one end of a thick rod 84 is fixedly installed on the other end of the thick spring 83, a scraper 85 is fixedly installed on the other end of the thick rod 84, and the thick rod 84 is slidably installed in the straight tube 82. There are multiple groups of straight bristles 81, straight tube 82, thick spring 83, thick rod 84 and scraper 85, and the multiple groups of straight bristles 81, straight tube 82, thick spring 83 and thick rod 84 are arranged in a linear array with equal spacing. Arranged on the outside of the straight rod 76, and multiple groups of straight tubes 82, thick springs 83, thick rods 84 and scrapers 85 are arranged in a circular array with equal spacing with the center of the circular cross-section of the straight rod 76 as the center of the array, the straight bristles are arranged in the straight tube 5, the straight tube 82, thick springs 83, thick rods 84 and scrapers 85 are arranged in the connecting tube 3, and when the top motor 72 drives the straight rod 76 to start rotating, the straight bristles 81 start rotating, thereby cleaning the inside of the straight tube 5, and at the same time, the thick spring 83 pushes the thick rod 84, so that the scraper 85 fits tightly against the inside of the connecting tube 3, thereby making the cleaning effect of the device better.

[0041] In one embodiment of the present invention, the flushing assembly 9 includes a sleeve 91, the sleeve 91 is fixedly installed on the outside of the straight rod 76, one end of a large spring 92 is fixedly installed on the inside of the sleeve 91, the other end of the large spring 92 is fixedly installed on the outer end of the outer cylinder 93, one end of a circular filter plate 94 is fixedly installed on the outside of the outer cylinder 93, and a cleaning brush 95 is fixedly installed on the other end of the circular filter plate 94, a heater 96 is fixedly installed on the outside of the bottom cylinder 2, a heat pipe 97 is fixedly installed on the outside of the heater 96, and a heat conductive block 98 is fixedly installed on the outside of the heat pipe 97, one end of a support rod 99 is fixedly installed on the outside of the bottom cylinder 2, a bottom motor 910 is fixedly installed on the other end of the support rod 99, and a bottom turbine 911 is fixedly installed on the output end of the bottom motor 910, a water inlet 912 is opened on the outside of the bottom cylinder 2, a cover 913 is clamped and installed on the outside of the water inlet 912, a bottom filter plate 914 is fixedly installed on the bottom of the bottom cylinder 2, a slide groove 915 is opened on the outside of the base 1, and a sliding filter plate 916 is slidably installed in the slide groove 915, and the sleeve 9 1 and the outer cylinder 93 are elliptical, the outer cylinder 93 slides and fits on the inner side of the sleeve 91, the sliding filter plate 916 is precisely fitted on the bottom of the bottom filter plate 914, the sliding filter plate 916 has the same filter hole size as the bottom filter plate 914, the heater 96, the heat pipe 97 and the support rod 99 are provided with multiple groups, and the sleeve 91 cooperates with the outer cylinder 93 to drive the round filter plate 94 to start rotating while cooperating with the top motor 72 to drive the straight rod 76 to rotate, so that the cleaning bristles 95 start to clean the surface of the bottom filter plate 914, and at the same time cooperate with the heater 96, the heat pipe 97 and the heat block 98 to heat the crude oil so that the crude oil will not agglomerate, and at the same time, when cleaning is needed, cooperate with moving the sliding filter plate 916, so that the filter holes of the bottom filter plate 914 and the sliding filter plate 916 are staggered, so that the crude oil will not flow out, so as to cooperate with opening the cover 913, and inject water into the device through the water inlet 912 for cleaning, and at the same time cooperate with the bottom motor 910 to drive the bottom turbine 911 to start rotating, so that the water flow flows rapidly.

[0042] Working principle: cooperate with the starting of the top motor 72 to make the turbine fan 73 and the round rod 74 start to rotate, and cooperate with the driving bevel gear 79 and the driven bevel gear 711 to make the cross bar 710 start to rotate, so that the stirring paddle 712 starts to rotate, so that the oil is quickly stirred, so that the sediment in the crude oil is reduced and the fluidity of the crude oil is improved. Further, cooperate with the top motor 72 to drive the straight rod 76 to rotate, and make the sleeve 91 cooperate with the outer cylinder 93 to drive the round filter plate 94 to start rotating, so that the cleaning bristles 95 start to clean the surface of the bottom filter plate 914, and cooperate with the heater 96, the heat pipe 97 and the heat block 98 to heat the crude oil so that the crude oil will not agglomerate. When cleaning is needed, the sliding filter plate 916 is moved so that the filter holes of the bottom filter plate 914 and the sliding filter plate 916 are staggered, so that the crude oil does not flow out, and the cover 913 is opened, and water is injected into the device through the water inlet 912 for cleaning. At the same time, the bottom motor 910 drives the bottom turbine 911 to start rotating, so that the water flows rapidly, and at the same time, the top motor 72 drives the straight rod 76 to start rotating, so that the straight bristles 81 start rotating, so as to clean the inside of the straight tube 5, and at the same time, the thick spring 83 pushes the thick rod 84, so that the scraper 85 fits precisely to the inside of the connecting tube 3, so that the cleaning effect of the device is better.

[0043] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism, comprising a base (1), a bottom tube (2) fixedly mounted on the outside of the base (1), a connecting tube (3) fixedly mounted on the outside of the bottom tube (2), an oil production pipe (4) clamped and mounted on the outside of the connecting tube (3), one end of a straight tube (5) fixedly mounted on the outside of the connecting tube (3), a square connecting box (6) fixedly mounted on the other end of the straight tube (5), an oil production pipe (4) clamped and mounted on the outside of the square connecting box (6), characterized in that: A stirring assembly (7), a cleaning assembly (8) and a flushing assembly (9) are arranged on the outside of the base (1), and the stirring assembly (7) comprises: A short column (71), one end of the short column (71) is fixedly mounted on the outside of the square connection box (6), a top motor (72) is fixedly mounted on the outside of the short column (71), and a turbine fan (73) is fixedly mounted on the output end of the top motor (72); A round rod (74), one end of the round rod (74) is fixedly mounted on the output end of the top motor (72), one end of a thin rod (75) is fixedly mounted on the other end of the round rod (74), a straight rod (76) is fixedly mounted on the other end of the thin rod (75), and one end of a support column (77) is fixedly mounted on the inner side of the square connection box (6); A protective tube (78), the other end of the support column (77) is fixedly mounted with the protective tube (78), the outer side of the thin rod (75) is fixedly mounted with a driving bevel gear (79), the outer side of the protective tube (78) is rotatably mounted with a cross bar (710), one end of the cross bar (710) is fixedly mounted with a driven bevel gear (711), and the other end of the cross bar (710) is fixedly mounted with a stirring paddle (712).

2. The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism according to claim 1, characterized in that: The oil production pipe (4), short column (71), cross bar (710), driven bevel gear (711) and stirring paddle (712) are provided in multiple groups.

3. The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism according to claim 1, characterized in that: A plurality of groups of driven bevel gears (711) are meshed with the driving bevel gear (79), and the stirring paddle (712) is arranged in the oil production pipe (4), thereby achieving a supporting effect.

4. The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism according to claim 1, characterized in that: The cleaning assembly (8) comprises straight bristles (81), a straight brush (81) is fixedly mounted on the outside of the straight rod (76), a straight cylinder (82) is fixedly mounted on the outside of the straight rod (76), one end of a thick spring (83) is fixedly mounted on the inside of the straight cylinder (82), one end of a thick rod (84) is fixedly mounted on the other end of the thick spring (83), a scraper (85) is fixedly mounted on the other end of the thick rod (84), and the thick rod (84) is slidably mounted in the straight cylinder (82).

5. The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism according to claim 4, characterized in that: The straight bristles (81), the straight tube (82), the thick spring (83), the thick rod (84) and the scraper (85) are provided in multiple groups.

6. The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism according to claim 4, characterized in that: The straight bristles are arranged in a straight tube (5), and the straight tube (82), thick spring (83), thick rod (84) and scraper (85) are arranged in a connecting tube (3).

7. The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism according to claim 1, characterized in that: The flushing assembly (9) comprises a sleeve (91), the sleeve (91) is fixedly mounted on the outside of the straight rod (76), one end of a large spring (92) is fixedly mounted on the inside of the sleeve (91), the other end of the large spring (92) is fixedly mounted on an outer cylinder (93), one end of a circular filter plate (94) is fixedly mounted on the outside of the outer cylinder (93), the other end of the circular filter plate (94) is fixedly mounted on a cleaning brush (95), a heater (96) is fixedly mounted on the outside of the bottom cylinder (2), a heat pipe (97) is fixedly mounted on the outside of the heater (96), and a heat pipe (97) is fixedly mounted on the outside of the heat pipe (97). A heat conducting block (98) is provided, one end of a support rod (99) is fixedly mounted on the outside of the bottom cylinder (2), a bottom motor (910) is fixedly mounted on the other end of the support rod (99), a bottom turbine (911) is fixedly mounted on the output end of the bottom motor (910), a water inlet (912) is provided on the outside of the bottom cylinder (2), a cover (913) is snap-fittedly mounted on the outside of the water inlet (912), a bottom filter plate (914) is fixedly mounted on the bottom of the bottom cylinder (2), a slide groove (915) is provided on the outside of the base (1), and a sliding filter plate (916) is slidably mounted in the slide groove (915).

8. The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism according to claim 7, characterized in that: The sleeve (91) and the outer cylinder (93) are elliptical in shape, and the outer cylinder (93) is slidably fitted on the inner side of the sleeve (91).

9. The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism according to claim 7, characterized in that: The sliding filter plate (916) is precisely fitted to the bottom of the bottom filter plate (914), and the filter holes of the sliding filter plate (916) and the bottom filter plate (914) have the same size.

10. The electrically heated double-tube thermal recovery wellhead device with a cleaning mechanism according to claim 7, characterized in that: The heater (96), the heat conducting pipe (97) and the support rod (99) are provided in multiple groups.

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