Wellhead sand filling plugging device

Abstract

The utility model discloses a wellhead sand filling plugging device which comprises a scattering assembly, the bottom of the scattering assembly is fixedly connected with a mixing assembly, the output end of the mixing assembly is fixedly connected with a discharging pipe, one side of the scattering assembly is fixedly connected with a water spraying assembly, and the other side of the scattering assembly is fixedly connected with an air spraying assembly. According to the wellhead sand filling plugging device, the problems of scattering and low fluency in the sand discharging process are solved, and meanwhile the problems of low sand and water ratio and low sand filling efficiency are solved; in addition, after sand filling is completed, the scattering blades are cleaned through the water spraying assembly, and the sand is prevented from adhering to the inner wall of the scattering box and the outer walls of the scattering blades.

Description

TECHNICAL FIELD

[0001] The utility model belongs to wellhead sand filling, plugging equipment technical field, concretely relates to wellhead sand filling and plugging device. BACKGROUND

[0002] Sand filling and plugging as a technology for temporarily isolating oil layers to protect target layers during oilfield development and exploitation has been widely used in oilfield production, and its biggest advantage is that it does not pollute the oil layer and is convenient for recovery. However, during the sand filling and plugging operation, foreign matter or sand particles of different sizes may be mistakenly filled into the well, or engineering accidents such as pipe string plugging and sand bridge pipe string jamming may occur due to the failure to control the proportion of sand, mud and water during the sand filling and plugging process.

[0003] Chinese utility model patent CN221682951U proposes a well repair operation wellhead sand filling device, which comprises a base, a filtering mechanism, a crushing and sieving mechanism and a mixing mechanism are arranged on the base, the filtering mechanism comprises a support frame, a filter box, a first motor, a first rotating shaft, a plurality of first stirring rods, a vibrating filter plate and a discharge pipe, the support frame is fixedly installed on the base, the filter box is fixedly installed on the support frame, the first motor is fixedly installed on the top of the filter box, the first rotating shaft is rotatably installed in the filter box, the top end of the first rotating shaft is fixedly connected with the output shaft of the first motor, a plurality of first stirring rods are fixedly installed on the first rotating shaft, and the discharge pipe is fixedly installed at the bottom of the first motor, the crushing and sieving mechanism comprises a crushing box, crushing wheels, a second motor, two gears and a sieving plate, the crushing box is fixedly installed on the base, the two crushing wheels are rotatably installed in the crushing box, the second motor is arranged on one side of the crushing box, the two gears are fixedly installed on the two crushing wheels, the two gears are meshed, the output shaft of the second motor is fixedly connected with the corresponding gear, and the sieving plate is arranged below the two crushing wheels.

[0004] In the prior art, the qualified sand, mud and water are proportioned, and the proportion of sand, mud and water entering the well is adjusted to improve the quality of sand filling and plugging and avoid sand plugging, sand jamming and mud pipe string plugging. However, during the sand discharging process, the sand cannot be scattered, which affects the smoothness of sand discharging, and the proportion of sand, mud and water needs to be proportioned separately, resulting in low sand filling and plugging efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a wellhead sand filling and plugging device, which solves the problems of scattering and low smoothness during sand discharging, and solves the problems of sand and water proportioning and low sand filling efficiency.

[0006] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0007] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0008] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0009] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0010] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0011] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0012] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0013] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0014] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0015] The utility model discloses a technical scheme is adopted, well mouth fills sand and blocks the device, including beating apart subassembly, the bottom fixed connection of beating apart subassembly has the mixing subassembly, the output of mixing subassembly fixedly connected with the discharge pipe, beating apart subassembly one side fixedly connected with water spraying subassembly, beating apart subassembly other side fixedly connected with air jet subassembly.

[0016] The well mouth sand filling and plugging device provided by the utility model, through the setting of the water spraying assembly, multiple rows of high-pressure water columns are sprayed out, the high-pressure water columns are used for impacting the scattered sand and cement, the scattering degree of the sand is further improved, the loosening degree of the sand in the discharging process is improved, the phenomenon of sand jamming is avoided, meanwhile, the sand, the slurry and the water are proportioned, the sand, the slurry and the water are proportioned and scattered at the same time, the sand filling and plugging efficiency is improved, in addition, after the sand filling is completed, the scattered blades are cleaned through the water spraying assembly, so that the sand is prevented from adhering to the inner wall of the scattering box and the outer wall of the scattered blades, through the setting of the air jet assembly, high-pressure gas is sprayed out through the air jet assembly during the sand filling, the sand is further scattered, the scattering degree of the sand is further improved, the loosening degree of the sand in the discharging process is improved, the phenomenon of sand jamming is avoided, in addition, after the sand filling is completed, the scattered blades are dried through the air jet assembly. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structure schematic view of the well mouth sand filling and plugging device of the utility model;

[0018] Figure 2 is a structure schematic view of the mixing assembly of the utility model;

[0019] Figure 3 is a structure schematic view of the water spraying assembly of the utility model;

[0020] Figure 4 is a structure schematic view of the air jet assembly of the utility model.

[0021] In the drawing, 10 is a scattering assembly, 11 is a scattering box, 12 is a feeding hopper, 13 is a discharging pipe, 14 is a scattered blade, 20 is a mixing assembly, 21 is a mixing box, 22 is a feeding groove, 23 is a mixing motor, 24 is a mixing shaft, 25 is a mixing blade, 30 is a discharging pipe, 40 is a water spraying assembly, 41 is a water spraying plate, 42 is a water spraying faucet, 43 is a water spraying valve, 44 is a booster pump, 45 is a water inlet pipe, 50 is an air jet assembly, 51 is an air jet plate, 52 is an air jet faucet, 53 is an air jet valve, 54 is an air inlet pipe and 55 is an air compressor. DETAILED DESCRIPTION

[0022] The utility model will be explained in detail below in combination with the drawings and specific embodiments.

[0023] The well mouth sand filling and plugging device provided by the utility model, like Figure 1As shown, including the dispersion assembly 10, the bottom of the dispersion assembly 10 is fixedly connected with the mixing assembly 20, the output end of the mixing assembly 20 is fixedly connected with the discharge pipe 30, one side of the dispersion assembly 10 is fixedly connected with the water spraying assembly 40, the other side of the dispersion assembly 10 is fixedly connected with the air spraying assembly 50; the dispersion assembly 10 includes a dispersion box 11, the top of the dispersion box 11 is provided with a feeding port for facilitating feeding, the top of the dispersion box 11 is provided with a feeding hopper 12, the bottom of the dispersion box 11 is provided with a discharging port for facilitating discharging, the bottom of the dispersion box 11 is provided with a discharging pipe 13, the discharging pipe 13 is connected with the mixing assembly 20; the water spraying assembly 40 is fixedly connected to the inner wall of one side of the dispersion box 11, the air spraying assembly 50 is fixedly connected to the inner wall of the other side of the dispersion box 11, the dispersion box 11 is provided with a dispersion blade assembly, the dispersion blade assembly is connected with the output shaft of an external motor through a rotating shaft, the dispersion blades 14 are arranged between the water spraying assembly 40 and the air spraying assembly 50; the dispersion blade assembly includes six groups of dispersion blades 14, the six groups of dispersion blades 14 are uniformly arranged on the outer wall of the rotating shaft in the circumferential direction, and the six groups of dispersion blades 14 are arranged on the same circular surface. Figure 2 As shown, the mixing assembly 20 includes a mixing box 21, the top of the mixing box 21 is provided with a feeding groove 22 matched with the discharging pipe 13, and further includes a mixing motor 23 arranged at one end outside the mixing box 21, the mixing box 21 is provided with a mixing shaft 24 connected with the output shaft of the mixing motor 23, the outer wall of the mixing shaft 24 is provided with mixing blades 25 along the axial direction of the mixing shaft 24, and the end of the mixing box 21 away from the mixing motor 23 is connected with the discharge pipe 30. Figure 3 As shown, the water spraying assembly 40 includes a water spraying plate 41 arranged on the inner wall of the dispersion box 11, the water spraying plate 41 is provided with a water faucet assembly on the side close to the inside of the dispersion box 11, the other side of the water spraying plate 41 is provided with a water valve 43, the water faucet assembly is connected with the water valve 43, the other end of the water valve 43 is connected with a booster pump 44 on the outer wall of the dispersion box 11, the inlet end of the booster pump 44 is connected with a water inlet pipe 45 connected with a water source; the water faucet assembly includes five groups of water faucets 42 uniformly arranged on the inner wall of the dispersion box 11 in the vertical direction, and the five groups of water faucets 42 are matched with the dispersion blade assembly. Figure 4 As shown, the air spraying assembly 50 includes an air spraying plate 51 arranged on the inner wall of the dispersion box 11, the air spraying plate 51 corresponds to the water spraying plate 41, the air spraying plate 51 is provided with an air faucet assembly on the side close to the inside of the dispersion box 11, the other side of the air spraying plate 51 is provided with an air valve 53, the air faucet assembly is connected with the air valve 53, the other end of the air valve 53 is connected with an air inlet pipe 54 on the outer wall of the dispersion box 11, and the air inlet end of the air inlet pipe 54 is connected with an air compressor 55; the air faucet assembly includes five groups of air faucets 52 uniformly arranged on the inner wall of the dispersion box 11 in the vertical direction, and the five groups of air faucets 52 are matched with the dispersion blade assembly.

[0024] The well mouth sand filling and plugging device has the advantages that the sand is further improved in the degree of dispersion, the degree of loosening of the sand in the discharging process is improved, the phenomenon of sand jamming is avoided, the sand, the slurry and the water are proportioned, the sand, the slurry and the water can be proportioned while being dispersed, the efficiency of sand filling and plugging is improved, and the dispersing blades can be cleaned by the water spraying assembly after sand filling is completed, so that the sand is prevented from adhering to the inner wall of the dispersing box and the outer wall of the dispersing blades.

[0025] Embodiment 1

[0026] The well mouth sand filling and plugging device provided in the embodiment has the advantages that the sand is further improved in the degree of dispersion, the degree of loosening of the sand in the discharging process is improved, the phenomenon of sand jamming is avoided, the sand, the slurry and the water are proportioned, the sand, the slurry and the water can be proportioned while being dispersed, the efficiency of sand filling and plugging is improved, and the dispersing blades can be cleaned by the water spraying assembly after sand filling is completed, so that the sand is prevented from adhering to the inner wall of the dispersing box and the outer wall of the dispersing blades. Figure 1 The well mouth sand filling and plugging device provided in the embodiment has the advantages that the sand is further improved in the degree of dispersion, the degree of loosening of the sand in the discharging process is improved, the phenomenon of sand jamming is avoided, the sand, the slurry and the water are proportioned, the sand, the slurry and the water can be proportioned while being dispersed, the efficiency of sand filling and plugging is improved, and the dispersing blades can be cleaned by the water spraying assembly after sand filling is completed, so that the sand is prevented from adhering to the inner wall of the dispersing box and the outer wall of the dispersing blades.

[0027] Embodiment 2

[0028] The well mouth sand filling and plugging device provided in the embodiment has the advantages that the sand is further improved in the degree of dispersion, the degree of loosening of the sand in the discharging process is improved, the phenomenon of sand jamming is avoided, the sand, the slurry and the water are proportioned, the sand, the slurry and the water can be proportioned while being dispersed, the efficiency of sand filling and plugging is improved, and the dispersing blades can be cleaned by the water spraying assembly after sand filling is completed, so that the sand is prevented from adhering to the inner wall of the dispersing box and the outer wall of the dispersing blades. Figure 1 The well mouth sand filling and plugging device provided in the embodiment has the advantages that the sand is further improved in the degree of dispersion, the degree of loosening of the sand in the discharging process is improved, the phenomenon of sand jamming is avoided, the sand, the slurry and the water are proportioned, the sand, the slurry and the water can be proportioned while being dispersed, the efficiency of sand filling and plugging is improved, and the dispersing blades can be cleaned by the water spraying assembly after sand filling is completed, so that the sand is prevented from adhering to the inner wall of the dispersing box and the outer wall of the dispersing blades.

[0029] Embodiment 3

[0030] The wellhead sand filling and plugging device provided in the embodiment comprises a dispersing assembly 10, a mixing assembly 20 fixedly connected to the bottom of the dispersing assembly 10, a discharge pipe 30 fixedly connected to the output end of the mixing assembly 20, a water spraying assembly 40 fixedly connected to one side of the dispersing assembly 10, and a gas spraying assembly 50 fixedly connected to the other side of the dispersing assembly 10. Figure 1 The dispersing assembly 10 comprises a dispersing box 11, the top of the dispersing box 11 is provided with an inlet, the top of the dispersing box 11 is provided with an inlet hopper 12 at the inlet, the bottom of the dispersing box 11 is provided with an outlet, and the bottom of the dispersing box 11 is provided with an outlet pipe 13 at the outlet, the outlet pipe 13 is connected to the mixing assembly 20. The water spraying assembly 40 is fixedly connected to the inner wall of one side of the dispersing box 11, the gas spraying assembly 50 is fixedly connected to the inner wall of the other side of the dispersing box 11, a dispersing blade assembly is installed in the dispersing box 11, the dispersing blade assembly is connected to the output shaft of an external motor through a rotating shaft, and the dispersing blades 14 are arranged between the water spraying assembly 40 and the gas spraying assembly 50. The dispersing blade assembly comprises six groups of dispersing blades 14, the six groups of dispersing blades 14 are uniformly arranged on the outer wall of the rotating shaft in the circumferential direction, and the six groups of dispersing blades 14 are arranged on the same circular surface.

[0031] Embodiment 4

[0032] The wellhead sand filling and plugging device provided in the embodiment comprises a dispersing assembly 10, a mixing assembly 20 fixedly connected to the bottom of the dispersing assembly 10, a discharge pipe 30 fixedly connected to the output end of the mixing assembly 20, a water spraying assembly 40 fixedly connected to one side of the dispersing assembly 10, and a gas spraying assembly 50 fixedly connected to the other side of the dispersing assembly 10. Figure 1 The dispersing assembly 10 comprises a dispersing box 11, the top of the dispersing box 11 is provided with an inlet, the top of the dispersing box 11 is provided with an inlet hopper 12 at the inlet, the bottom of the dispersing box 11 is provided with an outlet, and the bottom of the dispersing box 11 is provided with an outlet pipe 13 at the outlet, the outlet pipe 13 is connected to the mixing assembly 20. The water spraying assembly 40 is fixedly connected to the inner wall of one side of the dispersing box 11, the gas spraying assembly 50 is fixedly connected to the inner wall of the other side of the dispersing box 11, a dispersing blade assembly is installed in the dispersing box 11, the dispersing blade assembly is connected to the output shaft of an external motor through a rotating shaft, and the dispersing blades 14 are arranged between the water spraying assembly 40 and the gas spraying assembly 50. The dispersing blade assembly comprises six groups of dispersing blades 14, the six groups of dispersing blades 14 are uniformly arranged on the outer wall of the rotating shaft in the circumferential direction, and the six groups of dispersing blades 14 are arranged on the same circular surface. Figure 2As shown, the mixing assembly 20 includes a mixing box 21, a feeding trough 22 on the top of the mixing box 21, the feeding trough 22 cooperating with the discharge pipe 13, and a mixing motor 23. The mixing motor 23 is located at one end outside the mixing box 21. A mixing shaft 24 is provided inside the mixing box 21. The mixing shaft 24 is connected to the output shaft of the mixing motor 23. Mixing blades 25 are provided on the outer wall of the mixing shaft 24 along the axial direction of the mixing shaft 24. The end of the mixing box 21 away from the mixing motor 23 is connected to the discharge pipe 30.

[0033] Example 5

[0034] The wellhead sand-filling and sealing device proposed in this embodiment, such as Figure 1 As shown, the assembly includes a dispersing component 10, a mixing component 20 fixedly connected to the bottom of the dispersing component 10, a discharge pipe 30 fixedly connected to the output end of the mixing component 20, a water spraying component 40 fixedly connected to one side of the dispersing component 10, and an air spraying component 50 fixedly connected to the other side of the dispersing component 10. The dispersing component 10 includes a dispersing box 11, with a feed inlet at the top of the dispersing box 11, a feed hopper 12 installed at the feed inlet at the top of the dispersing box 11, and a discharge outlet at the bottom of the dispersing box 11, with a discharge pipe 13 installed at the discharge outlet at the bottom of the dispersing box 11 for discharging materials. Pipe 13 is connected to mixing component 20; water spray component 40 is fixed to the inner wall of one side of dispersing box 11, and air jet component 50 is fixed to the inner wall of the other side of dispersing box 11. Dispersing blade assembly is installed inside dispersing box 11. The dispersing blade assembly is connected to the output shaft of an external motor via a rotating shaft. Dispersing blades 14 are located between water spray component 40 and air jet component 50. The dispersing blade assembly includes six sets of dispersing blades 14, which are evenly arranged along the circumference on the outer wall of the rotating shaft, and are all located within the same circular surface. Figure 2 As shown, the mixing assembly 20 includes a mixing chamber 21, with a feed chute 22 at the top of the mixing chamber 21, which cooperates with the discharge pipe 13. It also includes a mixing motor 23, located at one end outside the mixing chamber 21. A mixing shaft 24 is located inside the mixing chamber 21, connected to the output shaft of the mixing motor 23. Mixing blades 25 are axially arranged on the outer wall of the mixing shaft 24. The end of the mixing chamber 21 furthest from the mixing motor 23 is connected to the discharge pipe 30. Figure 3 As shown, the water spray assembly 40 includes a water spray plate 41, which is located on the inner wall of the dispersing box 11. A water spray nozzle assembly is provided on one side of the water spray plate 41 near the inside of the dispersing box 11, and a water spray valve 43 is provided on the other side of the water spray plate 41. The water spray nozzle assembly is connected to the water spray valve 43. A booster pump 44 is connected to the other end of the water spray valve 43 on the outer wall of the dispersing box 11. A water inlet pipe 45 is connected to the water inlet end of the booster pump 44. The water spray nozzle assembly includes five sets of water spray nozzles 42, which are evenly arranged vertically on the inner wall of the dispersing box 11. The five sets of water spray nozzles 42 cooperate with the dispersing blade assembly.

[0035] Example 6

[0036] The wellhead sand filling and plugging device provided by the embodiment comprises a scattering assembly 10, a mixing assembly 20 fixedly connected to the bottom of the scattering assembly 10, a discharge pipe 30 fixedly connected to the output end of the mixing assembly 20, a water spraying assembly 40 fixedly connected to one side of the scattering assembly 10, and a gas spraying assembly 50 fixedly connected to the other side of the scattering assembly 10. Figure 1 As shown in the figure, the scattering assembly 10 comprises a scattering box 11, the top of the scattering box 11 is provided with an inlet, the top of the scattering box 11 is provided with an inlet hopper 12, the bottom of the scattering box 11 is provided with an outlet, and the bottom of the scattering box 11 is provided with an outlet pipe 13, the outlet pipe 13 is connected to the mixing assembly 20, the water spraying assembly 40 is fixedly connected to the inner wall of one side of the scattering box 11, the gas spraying assembly 50 is fixedly connected to the inner wall of the other side of the scattering box 11, the scattering box 11 is provided with a scattering blade assembly, the scattering blade assembly is connected to the output shaft of an external motor through a rotating shaft, and the scattering blades 14 are arranged between the water spraying assembly 40 and the gas spraying assembly 50. Figure 2 As shown in the figure, the mixing assembly 20 comprises a mixing box 21, the top of the mixing box 21 is provided with an inlet groove 22 matched with the outlet pipe 13, and a mixing motor 23 is arranged at one end of the mixing box 21, the mixing box 21 is provided with a mixing shaft 24 connected to the output shaft of the mixing motor 23, the outer wall of the mixing shaft 24 is provided with mixing blades 25 along the axial direction of the mixing shaft 24, and one end of the mixing box 21 away from the mixing motor 23 is connected to the discharge pipe 30. Figure 3 As shown in the figure, the water spraying assembly 40 comprises a water spraying plate 41 arranged in the inner wall of the scattering box 11, a water faucet assembly arranged on the side of the water spraying plate 41 close to the inside of the scattering box 11, a water valve 43 arranged on the other side of the water spraying plate 41, the water faucet assembly and the water valve 43 being connected to each other, a booster pump 44 connected to the outer wall of the scattering box 11 on the other side of the water valve 43, and a water inlet pipe 45 connected to the water inlet end of the booster pump 44. Figure 4 As shown in the figure, the gas spraying assembly 50 comprises a gas spraying plate 51 arranged in the inner wall of the scattering box 11, the gas spraying plate 51 corresponding to the water spraying plate 41, a gas faucet assembly arranged on the side of the gas spraying plate 51 close to the inside of the scattering box 11, a gas valve 53 arranged on the other side of the gas spraying plate 51, the gas faucet assembly and the gas valve 53 being connected to each other, an air inlet pipe 54 connected to the outer wall of the scattering box 11 on the other side of the gas valve 53, and an air compressor 55 connected to the air inlet end of the air inlet pipe 54.

Claims

1. A wellhead sand-filling and sealing device, characterized in that, It includes a dispersing component (10), a mixing component (20) is fixedly connected to the bottom of the dispersing component (10), a discharge pipe (30) is fixedly connected to the output end of the mixing component (20), a water spraying component (40) is fixedly connected to one side of the dispersing component (10), and an air jetting component (50) is fixedly connected to the other side of the dispersing component (10).

2. The wellhead sand-filling and plugging device according to claim 1, characterized in that, The dispersing assembly (10) includes a dispersing box (11), which has a feed inlet at the top and a feed hopper (12) at the feed inlet. The dispersing box (11) has a discharge outlet at the bottom and a discharge pipe (13) at the discharge outlet. The discharge pipe (13) is connected to the mixing assembly (20). The water spray assembly (40) is fixed to one side of the inner wall of the dispersing box (11), and the air jet assembly (50) is fixed to the other side of the inner wall of the dispersing box (11). The dispersing blade assembly is installed inside the dispersing box (11). The dispersing blade assembly is connected to the output shaft of an external motor through a rotating shaft. The dispersing blade (14) is located between the water spray assembly (40) and the air jet assembly (50).

3. The wellhead sand-filling and sealing device according to claim 2, characterized in that, The dispersing blade assembly includes six sets of dispersing blades (14), which are evenly arranged along the circumferential direction on the outer wall of the rotating shaft and are arranged in the same circular surface.

4. The wellhead sand-filling and sealing device according to claim 2, characterized in that, The mixing assembly (20) includes a mixing box (21), a feeding trough (22) on the top of the mixing box (21), the feeding trough (22) cooperating with the discharge pipe (13), and a mixing motor (23). The mixing motor (23) is located at one end outside the mixing box (21). A mixing shaft (24) is provided inside the mixing box (21). The mixing shaft (24) is connected to the output shaft of the mixing motor (23). A mixing blade (25) is provided on the outer wall of the mixing shaft (24) along the axial direction of the mixing shaft (24). The end of the mixing box (21) away from the mixing motor (23) is connected to the discharge pipe (30).

5. The wellhead sand-filling and sealing device according to claim 2, characterized in that, The water spray assembly (40) includes a water spray plate (41), which is located on the inner wall of the dispersing box (11). A water spray nozzle assembly is provided on one side of the water spray plate (41) near the inside of the dispersing box (11), and a water spray valve (43) is provided on the other side of the water spray plate (41). The water spray nozzle assembly is connected to the water spray valve (43), and a booster pump (44) is connected to the other end of the water spray valve (43) on the outer wall of the dispersing box (11). A water inlet pipe (45) is connected to the water inlet end of the booster pump (44).

6. The wellhead sand-filling and sealing device according to claim 5, characterized in that, The water spray nozzle assembly includes five sets of water spray nozzles (42), which are evenly arranged vertically on the inner wall of the dispersing box (11). The five sets of water spray nozzles (42) cooperate with the dispersing blade assembly.

7. The wellhead sand-filling and sealing device according to claim 5, characterized in that, The jet assembly (50) includes a jet plate (51), which is located on the inner wall of the dispersing box (11). The jet plate (51) corresponds to the water spray plate (41). A jet nozzle assembly is provided on one side of the jet plate (51) near the inside of the dispersing box (11), and a jet valve (53) is provided on the other side of the jet plate (51). The jet nozzle assembly is connected to the jet valve (53). An air inlet pipe (54) is connected to the other end of the jet valve (53) on the outer wall of the dispersing box (11). An air compressor (55) is connected to the air inlet end of the air inlet pipe (54).

8. The wellhead sand-filling and sealing device according to claim 7, characterized in that, The jet nozzle assembly includes five jet nozzles (52), which are evenly arranged vertically on the inner wall of the dispersing box (11). The five jet nozzles (52) cooperate with the dispersing blade assembly.

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