Anti-freezing and anti-blocking heat-preservation pigging and watering combined wellhead device

Abstract

The anti-freezing and anti-blocking heat-preservation pigging and watering combined wellhead device comprises an oil inlet pipe, the top of the oil inlet pipe penetrates through a placing base and is connected with the lower end of the middle of a U-shaped pipe, the two ends of the U-shaped pipe are connected with the two sides of the lower end of a quantitative box, and a liquid drainage pipe is installed in the middle of the rear side of the quantitative box; a watering mechanism and an electric control device are installed at the upper end of the placing base and located on the two sides of the protection box correspondingly, the watering mechanism is connected with an oil inlet pipe, and meanwhile a cleaning mechanism is arranged in the oil inlet pipe. According to the anti-freezing and anti-blocking heat-preservation pigging and watering combined wellhead device, the first driving motor drives the rotating shaft, the threaded barrel and the scraper to rotate, the scraper scrapes the interior of the oil inlet pipe, thick oil in the oil inlet pipe is fully mixed and diluted with hot water, and the later oil extraction efficiency is improved; the diluted oil is filtered through the filter plate, impurities are prevented from entering the pipeline to cause blockage, the filter plate is cleaned through the cleaning brush, filter holes are prevented from being blocked, and the use practicability is improved.

Description

Technical Field

[0001] The invention relates to the technical field related to wellhead devices, and in particular to an anti-freezing and heat-insulating pipe cleaning and water-adding combined wellhead device. Background Art

[0002] During the heavy oil extraction process, sticky oil will adhere to the inner wall of the oil well pipeline, which will affect the crude oil production. The crude oil is diluted by mixing water at high temperature, which not only reduces the viscosity of the crude oil, but also dissolves the sticky oil attached to the inside of the pipeline and makes the inside of the pipeline unobstructed.

[0003] After searching, it is found that the typical wellhead device in the prior art is a wellhead with a water injection process and publication number CN201723209U. It mainly solves the problem that water injection must be stopped every time when sampling at the existing wellhead and the gas collection extension casing is easy to freeze and block. It is characterized by: an extension pipe is connected to the connection between the water injection regulating valve and the return oil pipe riser; an S-shaped heating pipe is installed in the gas collection extension casing. The water injection process combination wellhead has the characteristics of continuous water injection sampling and anti-freezing and blockage of the gas collection extension casing.

[0004] In summary, although the existing water-mixing combined wellhead device has an anti-freezing and blocking function when in use, scale often accumulates inside the pipeline during long-term use. If it is not cleaned in time, it is easy to cause pipeline blockage, resulting in abnormal production of oil wells and reduced oil production efficiency. In view of the above problems, it is necessary to improve the existing equipment. Summary of the invention

[0005] The purpose of the present invention is to provide an anti-freezing and heat-insulating pipe cleaning and water-injecting combined wellhead device to solve the problem that the existing water-injecting combined wellhead device proposed in the above background technology has the function of anti-freezing and blockage when in use, but during long-term use, scale often accumulates inside the pipeline, which is easy to cause pipeline blockage if not cleaned in time, resulting in abnormal production of oil wells and reduced oil production efficiency.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: an anti-freezing and heat-insulating cleaning and water-mixing combined wellhead device, comprising an oil inlet pipe, The top of the oil inlet pipe passes through the placement seat and is connected with a threaded connector arranged at the middle and lower end of the U-shaped tube, and a first liquid suction pump is symmetrically arranged on both sides of the U-shaped tube. At the same time, both ends of the U-shaped tube are connected to the two sides of the lower end of the quantitative box. A discharge pipe is installed in the middle of the rear side of the quantitative box, and a second liquid suction pump is installed on the discharge pipe. At the same time, the top of the discharge pipe passes through the top of the protection box installed on the placement seat and extends to the outside of the protection box. The upper end of the placement seat is located on both sides of the protection box and are respectively installed with a water mixing mechanism and an electronic control device, and the water mixing mechanism is connected to the oil inlet pipe. At the same time, a cleaning mechanism is arranged inside the oil inlet pipe, and the cleaning mechanism includes a first driving motor, a rotating shaft, a threaded barrel and a scraper. The output end of the first driving motor passes through the middle of the upper end of the U-shaped tube and is connected to the rotating shaft. At the same time, the lower end of the rotating shaft passes through the middle of the lower end of the U-shaped tube and extends to the inside of the oil inlet pipe. The outer side of the rotating shaft is threadedly connected with a threaded barrel, and scrapers are symmetrically arranged on both sides of the threaded barrel, and the outer side of the scraper fits the inner wall of the oil inlet pipe.

[0007] Preferably, a filter plate is provided inside the top end of the oil inlet pipe, located at the upper end of the threaded barrel, and a clamping plate is provided inside the threaded connector above the filter plate. At the same time, the middle of the clamping plate is a rectangular structure, and the two ends of the clamping plate are arc structures. At the same time, the two ends of the clamping plate are detachably connected to the inside of the threaded connector, and cleaning brushes are symmetrically provided on both sides of the lower end of the clamping plate, and the bottom of the lower end of the cleaning brush is in contact with the upper end of the filter plate.

[0008] Preferably, a sewage pipe is installed in the middle of the lower end of the quantitative box above the U-shaped tube, and a sealing plug is provided on the inner side of the lower end of the sewage pipe. At the same time, a debris removal mechanism is provided inside the quantitative box.

[0009] Preferably, a first insulation layer is provided inside the protection box, and an air release valve is installed on one side of the top of the protection box. Meanwhile, a box door is connected to the rear side of the protection box via a hinge, and a temperature detector is installed on the box door.

[0010] Preferably, the water mixing mechanism includes a storage frame and a water tank, the storage frame is provided with a water tank inside, and an electric heater is symmetrically provided on a sealing cover plate installed on the upper end of the storage frame, and the bottom of the electric heater passes through the water tank and extends to the inside of the water tank, a water inlet pipe is installed in the middle of the upper end of the water tank, and a drain pipe is provided at the lower end of one side of the water tank, and a quantitative liquid pump is installed on the drain pipe, the drain pipe passes through the protective box and is connected to a four-way connector, and the four-way connector is connected to the oil inlet pipe through a plurality of water supply pipes, and electromagnetic one-way valves are installed on the water supply pipes.

[0011] Preferably, a second insulation layer is provided inside the storage frame, and a plurality of air inlet holes are equidistantly provided at the upper ends of one side of the storage frame and the second insulation layer, and a plurality of heat absorbing plates are equidistantly provided between the inner side of the second insulation layer and the outer side of the water tank, an exhaust fan is provided at the outer end of the other side of the storage frame, and both ends of the exhaust fan are respectively located inside the storage frame and the protective box.

[0012] Preferably, the impurity removal mechanism includes an impurity removal component and a driving component, and the impurity removal component includes a first movable disk, a connecting rod, a second movable disk and a connecting sleeve, the first movable disk is located on one side of the interior of the quantitative box, and a connecting rod is installed in the middle of one side of the first movable disk, and at the same time, a second movable disk is sleeved on the outer side of the connecting rod away from the first movable disk, a connecting sleeve is provided in the middle of one side of the second movable disk, and the connecting sleeve is sleeved on the outer side of the connecting rod, and at the same time, the connecting sleeve and the connecting rod both pass through one side of the quantitative box and are connected to the driving component.

[0013] Preferably, the driving assembly includes a support frame, a connecting shaft, a connecting gear, a driving gear and a second driving motor. The support frame is arranged above the electronic control equipment, and the support frame includes an L-shaped support plate and a vertical support plate. At the same time, a second driving motor is installed on the middle rear side of the vertical support plate. A driving gear is sleeved on the outer side of the output end of the second driving motor, and connecting gears are meshed and connected at both ends of the driving gear. At the same time, the middle of the connecting gear is connected to the vertical support plate through a connecting shaft. The front side of the connecting shaft passes through the vertical support plate and is connected to one end of two corresponding connecting short plates, and the two connecting short plates are vertically and longitudinally arranged. At the same time, the other ends of the two connecting short plates are respectively connected to one end of the corresponding connecting long plates, and the two connecting long plates are arranged in parallel, and the other ends of the two connecting long plates are respectively connected to the connecting sleeve and the positioning plate correspondingly arranged on one side of the outer end of the connecting rod.

[0014] Compared with the prior art, the invention has the following beneficial effects: the anti-freezing and heat-insulating cleaning and water-adding combined wellhead device can (1) In order to solve the problem that the existing water-mixing combined wellhead device has an anti-freezing and blocking function, but in long-term use, scale often accumulates inside the pipeline. If it is not cleaned in time, it is easy to cause pipeline blockage, resulting in abnormal production of the oil well and reduced oil production efficiency, the present application drives the rotating shaft, the threaded cylinder and the scraper to rotate by the first driving motor, so that the scraper scrapes the inside of the oil inlet pipe, and also makes the heavy oil inside the oil inlet pipe fully mixed and diluted with hot water, thereby improving the later oil production efficiency. At the same time, a filter plate is provided, so that the filter plate filters the diluted oil to prevent impurities from entering the pipeline and causing blockage. The filter plate rotates under the drive of the rotating shaft, so that the cleaning brush provided at the lower end of the clamping plate cleans the filter plate to avoid clogging of the filter holes, thereby improving the practicality of use. (2) In order to solve the problem that the existing water-mixing combined wellhead device has an anti-freezing and blocking function, but in long-term use, scale often accumulates inside the pipeline. If it is not cleaned in time, it is easy to cause pipeline blockage, resulting in abnormal production of oil wells and reduced oil production efficiency, the present application is provided with a debris removal mechanism, which drives the driving gear to rotate through the second driving motor, so that the connecting gear meshing with the driving gear drives the connecting shaft and the connecting short plate to rotate, and then the connecting short plate drives the corresponding connecting long plate to extend and retract, so that the connecting rod and the connecting sleeve drive the first movable plate and the second movable plate to move towards each other under the connection of the connecting long plate and the positioning plate, thereby cleaning the inner wall of the quantitative box; (3) In order to solve the problem that the existing water-mixing combined wellhead device does not provide protection and insulation for the pipeline when in use, which makes it easy to cause heat loss quickly when transporting hot water and increase heating energy consumption, the present application uses a first insulation layer and a second insulation layer to make the pipe fittings and the water storage tank located inside the protection box and the storage frame. When heating, the heat is not easily lost. Then, the heat inside the storage frame is transported to the inside of the protection box by using a heat absorbing plate and an exhaust fan in combination, so that the heat is fully utilized, excessive energy consumption is avoided, and the insulation effect is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the front cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the front cross-sectional structure of the oil inlet pipe of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 This is a schematic diagram of the cross-sectional structure of the quantitative box of the present invention; Figure 6 This is a schematic diagram of the front view structure of the drive assembly of the present invention; Figure 7 It is a rear cross-sectional structural schematic diagram of the present invention; Figure 8 It is a rear view structural schematic diagram of the present invention.

[0016] In the figure: 1. Placement seat; 2. Oil inlet pipe; 3. U-shaped pipe; 301. Threaded connector; 302. First liquid pump; 4. Dosing box; 401. Drain pipe; 402. Sealing plug; 5. Drain pipe; 501. Second liquid pump; 6. Protection box; 601. First insulation layer; 602. Air release valve; 603. Box door; 604. Temperature detector; 7. Storage frame; 701. Second insulation layer; 702. Air inlet hole; 8. Water storage tank; 801. Heat absorber; 9. Electric heater; 10. Sealing cover; 11. Water inlet pipe; 12. Drain pipe; 13. Dosing pump; 14. Four-way connector; 15. Water supply pipe; 1501, electromagnetic one-way valve; 16, exhaust fan; 17, electronic control equipment; 18, first drive motor; 19, rotating shaft; 20, threaded barrel; 21, scraper; 22, filter plate; 23, locking plate; 24, cleaning brush; 25, impurity removal mechanism; 2501, first movable disk; 2502, connecting rod; 2503, second movable disk; 2504, connecting sleeve; 2505, positioning plate; 2506, connecting long plate; 2507, connecting short plate; 2508, supporting frame; 2509, connecting shaft; 2510, connecting gear; 2511, driving gear; 2512, second drive motor. DETAILED DESCRIPTION

[0017] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-8 The present invention provides a technical solution: a combined wellhead device for preventing freezing and blocking, heat preservation, cleaning and water mixing, according to Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, the top of the oil inlet pipe 2 passes through the placement seat 1 and is connected to the threaded connector 301 set at the middle and lower end of the U-shaped pipe 3, and the first liquid pump 302 is symmetrically set on both sides of the U-shaped pipe 3. At the same time, the two ends of the U-shaped pipe 3 are connected to the two sides of the lower end of the quantitative box 4. A discharge pipe 5 is installed in the middle of the rear side of the quantitative box 4, and a second liquid pump 501 is installed on the discharge pipe 5. At the same time, the top of the discharge pipe 5 passes through the top of the protection box 6 installed on the placement seat 1 and extends to the outside of the protection box 6. A first insulation layer 601 is set inside the protection box 6, and a vent valve 602 is installed on one side of the top of the protection box 6. The vent valve 6 02 is the prior art, and its model is KYK0626GB. Through the air relief valve 602, the gas entering the protection box 6 can be discharged to avoid excessive air pressure inside the protection box 6, which affects the service life of the protection box 6. At the same time, the rear side of the protection box 6 is connected to the box door 603 through a hinge, and the box door 603 is installed with a temperature detector 604. The temperature detector 604 is the prior art, and its model is CYT-390. Through the temperature detector 604, it is convenient to detect the internal temperature of the protection box 6 to ensure that when the temperature is low, the oil is not easily frozen and blocked, thereby improving the oil production efficiency.

[0019] When in use, start the first liquid pump 302, so that the diluted oil enters the U-shaped tube 3 through the oil inlet pipe 2, and then enters the quantitative box 4 through the U-shaped tube 3, and then start the second liquid pump 501, so that the oil inside the quantitative box 4 is discharged through the discharge pipe 5.

[0020] according to Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the upper end of the placement seat 1 is located on both sides of the protection box 6, and a water mixing mechanism and an electric control device 17 are installed respectively, and the water mixing mechanism is connected to the oil inlet pipe 2. The water mixing mechanism includes a storage frame 7 and a water tank 8. The storage frame 7 is provided with a water tank 8 inside, and an electric heater 9 is symmetrically arranged on the sealing cover plate 10 installed on the upper end of the storage frame 7. At the same time, the bottom of the electric heater 9 passes through the water tank 8 and extends to the inside of the water tank 8. A water inlet pipe 11 is installed in the middle of the upper end of the water tank 8, and a drain pipe 12 is arranged at the lower end of one side of the water tank 8. At the same time, a quantitative liquid pump 13 is installed on the drain pipe 12. The drain pipe 12 passes through the protection box 6 and is connected to a four-way connector 14, and the four-way connector 14 is connected to the oil inlet pipe 2 through multiple water supply pipes 15, and at the same time, an electromagnetic one-way valve 1501 is installed on the water supply pipe 15.

[0021] When in use, water is transported to the water storage tank 8 through the water inlet pipe 11, and then the water is heated by the electric heater 9. The heated hot water is transported through the drain pipe 12 under the action of the quantitative liquid pump 13, and the corresponding electromagnetic one-way valve 1501 is opened, so that the hot water enters the oil inlet pipe 2 through the water supply pipe 15 to dilute the heavy oil.

[0022] To further explain, a second insulation layer 701 is provided inside the storage frame 7, and a plurality of air inlet holes 702 are equidistantly provided at the upper ends of one side of the storage frame 7 and the second insulation layer 701, and a plurality of heat absorbing plates 801 are equidistantly provided between the inner side of the second insulation layer 701 and the outer side of the water tank 8, and an exhaust fan 16 is provided at the outer end of the other side of the storage frame 7, and both ends of the exhaust fan 16 are respectively located inside the storage frame 7 and the protective box 6.

[0023] When in use, the heat inside the storage frame 7 is absorbed by the heat absorbing sheet 801, so that the heat is more concentrated, and then the exhaust fan 16 is started to allow external air to enter the storage frame 7 through the air inlet 702, and the heat on the heat absorbing sheet 801 is transported to the inside of the protective box 6, so that the overflow heat when heating the water can be utilized, thereby improving the practicality of use and reducing energy consumption.

[0024] according to Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, a cleaning mechanism is arranged inside the oil inlet pipe 2, and the cleaning mechanism includes a first drive motor 18, a rotating shaft 19, a threaded barrel 20 and a scraper 21, and the output end of the first drive motor 18 passes through the middle of the upper end of the U-shaped tube 3 and is connected to the rotating shaft 19, while the lower end of the rotating shaft 19 passes through the middle of the lower end of the U-shaped tube 3 and extends to the inside of the oil inlet pipe 2, the outer side of the rotating shaft 19 is threadedly connected with the threaded barrel 20, and the two sides of the threaded barrel 20 are symmetrically arranged with scrapers 21, and the outer side of the scraper 21 is in contact with the inner wall of the oil inlet pipe 2, and the oil inlet pipe 2 A filter plate 22 is provided inside the top end at the upper end of the threaded barrel 20, the middle of the filter plate 22 is connected to the outer side of the upper end of the rotating shaft 19, and a clamping plate 23 is provided inside the threaded connector 301 above the filter plate 22. At the same time, the middle of the clamping plate 23 is a rectangular structure, and the two ends of the clamping plate 23 are arc structures. At the same time, the two ends of the clamping plate 23 are detachably connected to the inside of the threaded connector 301, and cleaning brushes 24 are symmetrically provided on both sides of the lower end of the clamping plate 23, and the bottom of the lower end of the cleaning brush 24 is in contact with the upper end of the filter plate 22.

[0025] When in use, the first drive motor 18 is started to drive the rotating shaft 19 to rotate, so that the rotating shaft 19 drives the threaded cylinder 20, the scraper 21 and the filter plate 22 to rotate synchronously, and then the thick oil inside the oil inlet pipe 2 is mixed with hot water, and the thick oil is diluted while the scraper 21 cleans the thick oil adhered to the inner wall of the oil inlet pipe 2, and then the diluted oil is filtered through the filter plate 22, and then the impurities in the oil adhere to the filter plate 22, so that the filter plate 22 rotates for filtering while the cleaning brush 24 cleans the filter plate 22, so that the impurities are not easy to block the filter holes, thereby improving the oil circulation efficiency.

[0026] according to Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a sewage pipe 401 is installed in the middle of the lower end of the quantitative box 4 above the U-shaped tube 3, and a sealing plug 402 is provided on the inner side of the lower end of the sewage pipe 401. At the same time, a debris removal mechanism 25 is provided inside the quantitative box 4, and the debris removal mechanism 25 includes a debris removal component and a driving component.

[0027] Specifically, the impurity removal component includes a first movable disk 2501, a connecting rod 2502, a second movable disk 2503 and a connecting sleeve 2504. The first movable disk 2501 is located on one side of the interior of the quantitative box 4, and a connecting rod 2502 is installed in the middle of one side of the first movable disk 2501. At the same time, the second movable disk 2503 is sleeved on the outer side of the end of the connecting rod 2502 away from the first movable disk 2501. A connecting sleeve 2504 is arranged in the middle of one side of the second movable disk 2503, and the connecting sleeve 2504 is sleeved on the outer side of the connecting rod 2502. At the same time, the connecting sleeve 2504 and the connecting rod 2502 both pass through one side of the quantitative box 4 and are connected to the driving component. The second movable disk 2503 and the connecting sleeve 2504 are slidably connected to the connecting rod 2502, so that under the action of the driving component, the second movable disk 2503 moves toward the side of the first movable disk 2501, thereby cleaning impurities adhered to one side of the interior of the quantitative box 4.

[0028] Specifically, the driving assembly includes a support frame 2508, a connecting shaft 2509, a connecting gear 2510, a driving gear 2511 and a second driving motor 2512. The support frame 2508 is arranged above the electric control device 17, and the support frame 2508 includes an L-shaped supporting plate and a vertical supporting plate. At the same time, the second driving motor 2512 is installed on the middle rear side of the vertical supporting plate. The outer side of the output end of the second driving motor 2512 is sleeved with a driving gear 2511, and the two ends of the driving gear 2511 are meshed and connected with the connecting gear 2510. At the same time, the connecting gear 25 10 is connected to the vertical support plate through a connecting shaft 2509 in the middle. The front side of the connecting shaft 2509 passes through the vertical support plate and is connected to one end of two corresponding connecting short plates 2507, and the two connecting short plates 2507 are arranged vertically and longitudinally. At the same time, the other ends of the two connecting short plates 2507 are respectively connected to one end of the corresponding connecting long plates 2506, and the two connecting long plates 2506 are arranged in parallel, and the other ends of the two connecting long plates 2506 are respectively connected to the connecting sleeve 2504 and the positioning plate 2505 correspondingly arranged on one side of the outer end of the connecting rod 2502.

[0029] When in use, the second drive motor 2512 drives the drive gear 2511 to rotate, so that the connecting gear 2510 meshing with the drive gear 2511 drives the connecting shaft 2509 and the connecting short plate 2507 to rotate, and then the connecting short plate 2507 drives the correspondingly connected connecting long plate 2506 to extend and retract, so that the connecting rod 2502 and the connecting sleeve 2504 drive the first movable disk 2501 and the second movable disk 2503 to move toward each other under the connection of the connecting long plate 2506 and the positioning plate 2505, thereby cleaning the inner wall of the quantitative box 4, and then open the sealing plug 402 to allow the garbage generated by cleaning to be discharged through the sewage pipe 401.

[0030] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined wellhead device for preventing freezing and blocking, heat preservation, cleaning and water mixing, comprising an oil inlet pipe (2), characterized in that: The top of the oil inlet pipe (2) passes through the placement seat (1) and is connected to a threaded connector (301) provided at the middle lower end of the U-shaped pipe (3), and first liquid pumps (302) are symmetrically provided on both sides of the U-shaped pipe (3). At the same time, both ends of the U-shaped pipe (3) are connected to both sides of the lower end of the quantitative box (4). A liquid discharge pipe (5) is installed in the middle of the rear side of the quantitative box (4), and a second liquid discharge pump (501) is installed on the liquid discharge pipe (5). At the same time, the top of the liquid discharge pipe (5) passes through the top of the protection box (6) installed on the placement seat (1) and extends to the outside of the protection box (6). The upper end of the placement seat (1) is located on both sides of the protection box (6) and is respectively installed with a water mixing mechanism and an electric control device (17 ), and the water mixing mechanism is connected to the oil inlet pipe (2), and a cleaning mechanism is arranged inside the oil inlet pipe (2), the cleaning mechanism comprising a first drive motor (18), a rotating shaft (19), a threaded barrel (20) and a scraper (21), and the output end of the first drive motor (18) passes through the middle of the upper end of the U-shaped pipe (3) and is connected to the rotating shaft (19), and the lower end of the rotating shaft (19) passes through the middle of the lower end of the U-shaped pipe (3) and extends to the inside of the oil inlet pipe (2), the outer side of the rotating shaft (19) is threadedly connected to the threaded barrel (20), and scrapers (21) are symmetrically arranged on both sides of the threaded barrel (20), and the outer side of the scraper (21) is in contact with the inner wall of the oil inlet pipe (2).

2. The anti-freezing and heat-insulating pigging and water-adding combined wellhead device according to claim 1, characterized in that: A filter plate (22) is provided inside the top end of the oil inlet pipe (2) and located at the upper end of the threaded barrel (20), and a clamping plate (23) is provided inside the threaded connector (301) above the filter plate (22), and the middle of the clamping plate (23) is a rectangular structure, and the two ends of the clamping plate (23) are arc-shaped structures, and the two ends of the clamping plate (23) are detachably connected to the inside of the threaded connector (301), and cleaning brushes (24) are symmetrically provided on both sides of the lower end of the clamping plate (23), and the bottom of the lower end of the cleaning brush (24) is in contact with the upper end of the filter plate (22).

3. The anti-freezing and heat-insulating pigging and water-adding combined wellhead device according to claim 1, characterized in that: The lower end of the quantitative box (4) is located above the U-shaped tube (3) and a sewage pipe (401) is installed in the middle, and a sealing plug (402) is provided on the inner side of the lower end of the sewage pipe (401). At the same time, a debris removal mechanism (25) is provided inside the quantitative box (4).

4. The anti-freezing and heat-insulating pigging and water-adding combined wellhead device according to claim 1, characterized in that: The protection box (6) is provided with a first heat-insulating layer (601) inside, and a gas relief valve (602) is installed on one side of the top of the protection box (6). The rear side of the protection box (6) is connected to a box door (603) via a hinge, and a temperature detector (604) is installed on the box door (603).

5. The anti-freezing and heat-insulating pigging and water-adding combined wellhead device according to claim 1, characterized in that: The water mixing mechanism comprises a storage frame (7) and a water tank (8). The storage frame (7) is provided with a water tank (8) inside, and an electric heater (9) is symmetrically provided on a sealing cover plate (10) installed at the upper end of the storage frame (7). At the same time, the bottom of the electric heater (9) passes through the water tank (8) and extends into the water tank (8). A water inlet pipe (11) is installed in the middle of the upper end of the water tank (8), and a drainage pipe (12) is provided at the lower end of one side of the water tank (8). At the same time, a quantitative liquid pump (13) is installed on the drainage pipe (12). The drainage pipe (12) passes through the protection box (6) and is connected to a four-way connector (14). The four-way connector (14) is connected to the oil inlet pipe (2) through a plurality of water supply pipes (15). At the same time, each water supply pipe (15) is installed with an electromagnetic one-way valve (1501).

6. The anti-freezing and heat-insulating pigging and water-adding combined wellhead device according to claim 5, characterized in that: A second thermal insulation layer (701) is arranged inside the storage frame (7), and a plurality of air inlet holes (702) are equidistantly provided at the upper ends of one side of the storage frame (7) and the second thermal insulation layer (701), and a plurality of heat absorbing sheets (801) are equidistantly provided between the inner side of the second thermal insulation layer (701) and the outer side of the water storage tank (8), and an exhaust fan (16) is arranged at the outer end of the other side of the storage frame (7), and the two ends of the exhaust fan (16) are respectively located inside the storage frame (7) and the protective box (6).

7. The anti-freezing and heat-insulating pigging and water-adding combined wellhead device according to claim 3 is characterized in that: The impurity removal mechanism (25) comprises an impurity removal component and a driving component, and the impurity removal component comprises a first movable disk (2501), a connecting rod (2502), a second movable disk (2503) and a connecting sleeve (2504); the first movable disk (2501) is located at one side of the inside of the quantitative box (4); the connecting rod (2502) is installed in the middle of one side of the first movable disk (2501); the second movable disk (2503) is sleeved on the outer side of one end of the connecting rod (2502) away from the first movable disk (2501); the connecting sleeve (2504) is arranged in the middle of one side of the second movable disk (2503); the connecting sleeve (2504) is sleeved on the outer side of the connecting rod (2502); the connecting sleeve (2504) and the connecting rod (2502) both pass through one side of the quantitative box (4) and are connected to the driving component.

8. The anti-freezing and heat-insulating pigging and water-adding combined wellhead device according to claim 7, characterized in that: The driving assembly comprises a support frame (2508), a connecting shaft (2509), a connecting gear (2510), a driving gear (2511) and a second driving motor (2512); the support frame (2508) is arranged above the electric control device (17), and the support frame (2508) comprises an L-shaped supporting plate and a vertical supporting plate, and a second driving motor (2512) is installed on the middle rear side of the vertical supporting plate, and the driving gear (2511) is sleeved on the outer side of the output end of the second driving motor (2512), and the two ends of the driving gear (2511) are meshedly connected to the connecting gear (2510), and the connecting gear (2510) is meshedly connected to the connecting gear (2510). 510) is connected to the vertical support plate through a connecting shaft (2509) in the middle, the connecting shaft (2509) passes through the vertical support plate on the front side and is connected to one end of two corresponding connecting short plates (2507), and the two connecting short plates (2507) are arranged vertically and longitudinally, and the other ends of the two connecting short plates (2507) are respectively connected to one end of a corresponding connecting long plate (2506), the two connecting long plates (2506) are arranged in parallel, and the other ends of the two connecting long plates (2506) are respectively connected to the connecting sleeve (2504) and the positioning plate (2505) correspondingly arranged on one side of the outer end of the connecting rod (2502).

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