Nanometer extraction dispersing agent for preventing ultrahigh-condensation-point wax and scale in oil-gas well of high-water-content shale oil and preparation method of nanometer extraction dispersing agent

Abstract

The invention relates to the technical field of dispersants, and provides a nano extraction dispersant for preventing ultrahigh-condensation-point wax and scale in a high-water-content shale oil-gas well and a preparation method of the nano extraction dispersant, and the nano extraction dispersant comprises the following raw materials by weight: 18-32% of fatty amine polyethoxy etherate; 15%-28% of isomeric oleate sulfonate; 7%-15% of isoalkane d40; 3%-7% of diethylene glycol monobutyl ether; 3.51%-2% of JFC; the dispersant liquid medicine is used for removing wax and scale in pipelines and exploitation tools in oil exploitation; when the dispersing agent is prepared, water needs to be added for mixing, and the water adding amount is 8-15 times of that of liquid medicine. The preparation method comprises the following steps: step 1, preparation; preparing raw materials of corresponding components, a group of mixing devices and a group of extraction towers; 2, mixing and extracting; step 3, preparation and application; according to the technical scheme, the problems that an existing dispersant causes large operation load of an oil well pump, high return pressure of a producing well, frequent maintenance of the oil well, high cost and influence on oil production are solved, and better use prospects can be brought.

Description

Technical Field

[0001] The invention relates to the technical field of dispersants, and in particular to a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water-containing shale oil and gas wells and a preparation method thereof. Background Art

[0002] In the process of crude oil extraction, paraffin dissolved in crude oil will precipitate from natural gas as external pressure and temperature decrease, and grow in the form of crystals, gather and deposit on the wall of oil pipes and other oil extraction equipment. This process is called oil well waxing, which will lead to a decrease in extraction efficiency.

[0003] After research, it was found that the oil wells have high water content and the mixed liquid has many heavy components, the oil wells are seriously waxed, and the deposited asphaltene and wax have high carbon numbers and are hard, making them difficult to remove by hot washing; conventional wax removal and prevention agents are ineffective; this will cause the oil pump to operate under heavy load, resulting in high back pressure in the oil wells, frequent oil well maintenance and high costs, affecting oil production;

[0004] After searching, the authorization announcement number is CN 105419756 B, which is a wax removal and prevention composition, a water-soluble wax removal and prevention agent and a preparation method thereof. The water-soluble wax removal and prevention agent obtained by the invention has a wax dissolving rate of more than 0.020 g / min, a wax prevention rate of more than 71%, and a density greater than 0.95 g / cm 3 , has good wax removal and anti-wax effect, and is very convenient to use;

[0005] However, the above existing dispersants will cause a large operating load on the oil pump, resulting in high back pressure in the oil wells, frequent and high cost of oil well maintenance, and affecting oil production. To this end, we proposed a nano-extraction dispersant and preparation method for preventing ultra-high pour point wax and scale in high water-content shale oil and gas wells. Summary of the invention

[0006] The present invention proposes a nano-extraction dispersant and a preparation method for preventing ultra-high pour point wax and scale in high water-content shale oil and gas wells, which solves the problem mentioned in the background technology that the existing dispersant will cause a large operating load on the oil pump, resulting in high back pressure in the oil well, frequent and high cost of oil well maintenance, and affected oil production.

[0007] The technical solution of the present invention is as follows:

[0008] A nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water-containing shale oil and gas wells, comprising the following raw materials by weight:

[0009]

[0010]

[0011] The dispersant liquid is used to remove wax and scale from pipelines and mining tools in oil production;

[0012] When preparing the dispersant, water needs to be added for mixing, and the amount of water added is 8 to 15 times that of the drug solution.

[0013] As a further technical solution of the present invention, the dispersant includes the following raw materials by weight:

[0014]

[0015] As a further technical solution of the present invention, the dispersant includes the following raw materials by weight:

[0016]

[0017] As a further technical solution of the present invention, the dispersant includes the following raw materials by weight:

[0018]

[0019] A method for preparing a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water-containing shale oil and gas wells, the preparation method comprising the following steps:

[0020] Step 1: Preparation: Prepare the raw materials of the corresponding components, a set of mixing devices and a set of extraction towers;

[0021] Step 2: Mixing and extraction: The corresponding raw materials are mixed in sequence through a mixing device, and after being fully mixed, they are extracted into an extraction tower to the nanometer level, and then packed into a 25kg plastic barrel or a 200L galvanized iron barrel;

[0022] Step 3: Preparation and application: Pump the prepared liquid medicine into the mixing device and mix it thoroughly with the corresponding amount of water.

[0023] Further, the mixing device comprises a preparation box, the upper end of which is fixedly connected to a feed frame for adding water, the upper end of which is fixedly connected to a motor, and the upper end surface of which is provided with a water adding structure;

[0024] The water adding structure includes a water inlet pipe that passes through the outer shell of the preparation box, the lower end of the water inlet pipe is fixedly connected to a positioning frame, the surface of the positioning frame is rotatably connected to a rotating tube, the lower end of the rotating tube is fixedly connected to a spray head, the inner side of the rotating tube is fixedly connected to an inner gear ring, the surface of the rotating shaft is fixedly connected to a driving gear, a transmission gear is meshedly connected between the driving gear and the inner gear ring, and the outer surface of the water inlet pipe is fixedly connected to a water supply solenoid valve.

[0025] Furthermore, the interior of the preparation box is rotatably connected to a rotating shaft, the outer surface of the rotating shaft is fixedly connected to a stirring blade, a plurality of groups of heating tubes in a ring array are arranged in the internal interlayer of the preparation box, the lower end of the preparation box is fixedly connected to a discharge pipe, and the outer surface of the discharge pipe is fixedly connected to a discharge solenoid valve.

[0026] Furthermore, the water inlet pipe is fixed to the preparation box by bolts, the positioning frame is fixedly connected to the preparation box by a bracket, the rotating tube rotates along the arc direction of the positioning frame, the transmission gear is fixed to the preparation box by the bracket, the transmission gear is rotationally connected to the bracket, one end of the rotating shaft is fixedly connected to the output end of the motor, and the rotating shaft is driven to rotate by the motor.

[0027] Furthermore, in step 2, the mixture is stirred by a stirring blade, and the temperature is kept between 80°C and 115°C by a heating tube, and the stirring time is 30min to 90min. In step 3, the required amount of water is first added, and then the extractant solution is added, and finally the water adding structure is coordinated with the rotating shaft, the stirring blade and the motor to stir and add the solution until it is fully mixed, and then heated to more than 95°C before application.

[0028] Furthermore, the relevant indicators of the prepared liquid medicine before adding water are as follows:

[0029] Appearance: light yellow transparent mucus;

[0030] pH: 8.5-12;

[0031] HLB: 10-13;

[0032] Density: 0.955-1.03.

[0033] The present invention can effectively solve the problems of high water content in oil wells, a large amount of heavy components in the mixed liquid, severe wax deposition in the oil wells, high carbon number and hard quality of deposited asphaltene and wax, which are difficult to be removed by hot washing, by setting a unique raw material formula and a unique water adding structure, in combination with a preparation method; conventional wax removing and preventing agents are ineffective, resulting in a large operating load on the oil pump, high back pressure in the oil production wells, frequent and high cost of oil well maintenance, and affecting oil production; the agent of the present invention can effectively remove and prevent this problem, reduce oil well maintenance, be safe and environmentally friendly, save costs while solving this problem, and increase production.

[0034] In summary, the use principle of the present invention is as follows: when preparing the liquid medicine, the user can add the raw materials of the liquid medicine into the preparation box through the feeding frame, start the motor to drive the rotating shaft to rotate, and drive the stirring blades to rotate through the rotating shaft, and the stirring blades fully mix and stir the materials inside the preparation box. At the same time, the interior of the preparation box is heated to between 80°C and 115°C through the heating pipe, and the stirring time is controlled to 30min-90min. After the stirring is completed, the discharge solenoid valve is opened, and the liquid medicine is discharged through the discharge pipe and packed into a 25kg plastic barrel or a 200L galvanized iron barrel;

[0035] When it is needed in oil extraction, city water is added through the feed frame, and the water eventually flows into the preparation box. After that, the liquid medicine can be pumped into one end of the water inlet pipe, and the water supply solenoid valve is opened to introduce the liquid medicine. The liquid medicine flows into the interior of the positioning frame and the rotating tube through the water inlet pipe. During the adding process, the motor starts synchronously to drive the rotating shaft to rotate, and the rotating shaft drives the stirring blades to rotate to dilute and stir the liquid medicine. During the rotation of the rotating shaft, the driving gear is driven to rotate, and the driving gear drives the transmission gear to rotate, and the transmission gear drives the inner gear ring to rotate, and the rotating tube is driven to rotate through the inner gear ring, so that the liquid medicine is evenly sprayed on the interior of the preparation box, and the liquid medicine inside the preparation box is more evenly mixed and stirred, thereby achieving the effect of accelerated mixing and stirring, so that the liquid medicine and water are quickly mixed to the required state. During the stirring process, heat is synchronously generated by the heating tube to achieve the effect of rapid mixing.

[0036] The working principle and beneficial effects of the present invention are:

[0037] The present invention can effectively solve the problems of high water content in oil wells, a large amount of heavy components in the mixed liquid, severe wax deposition in the oil wells, high carbon number and hard quality of deposited asphaltene and wax, which are difficult to be removed by hot washing, by setting a unique raw material formula and a unique water adding structure, in combination with a preparation method; conventional wax removing and preventing agents are ineffective, resulting in a large operating load on the oil pump, high back pressure in the oil production wells, frequent and high cost of oil well maintenance, and affecting oil production; the agent of the present invention can effectively remove and prevent this problem, reduce oil well maintenance, be safe and environmentally friendly, save costs while solving this problem, and increase production. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Figure 1 The schematic diagram of the device structure for preparing the dispersant of the present invention;

[0040] Figure 2 For the present invention Figure 1 Schematic diagram of the cutaway local structure;

[0041] Figure 3It is a schematic diagram of a partial structure of the water adding structure of the present invention;

[0042] Figure 4 For the present invention Figure 3 Schematic diagram of the cutaway partial structure.

[0043] In the figure: 1. preparation box; 2. feed frame; 3. water adding structure; 31. water inlet pipe; 32. positioning frame; 33. rotating pipe; 34. sprinkler head; 35. inner ring gear; 36. driving gear; 37. transmission gear; 38. water supply solenoid valve; 4. motor; 5. rotating shaft; 6. stirring blade; 7. heating pipe; 8. discharge pipe; 9. discharge solenoid valve. DETAILED DESCRIPTION

[0044] The following will be combined with 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.

[0045] Example 1

[0046] like Figure 1 to Figure 4 As shown, this embodiment proposes a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells, and the dispersant liquid is used to remove wax and scale in pipelines and mining tools in oil production;

[0047] When preparing the dispersant, water needs to be added for mixing, and the amount of water added is 8 to 15 times that of the drug solution.

[0048] The dispersant includes the following raw materials by weight:

[0049]

[0050] (I) Screening of drugs: Drugs obtained by the technology of the present invention

[0051] (II) Oil well circulation online cleaning

[0052] (1) On-site preparation of construction liquid: Use steam to heat the tap water (12m3) in the liquid preparation tank to above 95°C, and then add 1.3t (or depending on the well conditions) of the nano-extraction dispersant of the present invention. The total liquid volume is 13.5m3 3

[0053] The preparation of the liquid medicine is as follows: a method for preparing a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells, the preparation method comprising the following steps:

[0054] Step 1: Preparation: Prepare the raw materials of the corresponding components, a set of mixing devices and a set of extraction towers;

[0055] Step 2: Mixing and extraction: The corresponding raw materials are mixed in sequence through a mixing device, and after being fully mixed, they are extracted into an extraction tower to the nanometer level, and then packed into a 25kg plastic barrel or a 200L galvanized iron barrel;

[0056] Step 3: Preparation and application: Pump the prepared liquid medicine into the mixing device and mix it thoroughly with the corresponding amount of water.

[0057] The mixing device comprises a preparation box 1, a feed frame 2 for adding water is fixedly connected to the upper end of the preparation box 1, a motor 4 is fixedly connected to the upper end of the preparation box 1, and a water adding structure 3 is arranged on the upper end surface of the preparation box 1;

[0058] The water adding structure 3 includes a water inlet pipe 31 which passes through the outer shell of the preparation box 1. The lower end of the water inlet pipe 31 is fixedly connected to a positioning frame 32. The surface of the positioning frame 32 is rotatably connected to a rotating tube 33. The lower end of the rotating tube 33 is fixedly connected to a spray head 34. The inner side of the rotating tube 33 is fixedly connected to an inner gear ring 35. The surface of the rotating shaft 5 is fixedly connected to a driving gear 36. A transmission gear 37 is meshingly connected between the driving gear 36 and the inner gear ring 35. The outer surface of the water inlet pipe 31 is fixedly connected to a water supply solenoid valve 38.

[0059] The interior of the preparation box 1 is rotatably connected to a rotating shaft 5, the outer surface of the rotating shaft 5 is fixedly connected to a stirring blade 6, a plurality of groups of heating tubes 7 in a ring array are arranged in the inner interlayer of the preparation box 1, a discharge pipe 8 is fixedly connected to the lower end of the preparation box 1, and a discharge solenoid valve 9 is fixedly connected to the outer surface of the discharge pipe 8.

[0060] The water inlet pipe 31 is fixed to the preparation box 1 by bolts, the positioning frame 32 is fixedly connected to the preparation box 1 through a bracket, the rotating tube 33 rotates along the arc direction of the positioning frame 32, the transmission gear 37 is fixed to the preparation box 1 through the bracket, the transmission gear 37 is rotationally connected to the bracket, one end of the rotating shaft 5 is fixedly connected to the output end of the motor 4, and the rotating shaft 5 is driven to rotate by the motor 4.

[0061] In step 2, the mixture is stirred by the stirring blade 6, and the temperature is kept between 80°C and 115°C by the heating tube 7, and the stirring time is 30min-90min; in step 3, the required amount of water is first added, and then the extractant liquid is added, and finally the water adding structure 3 cooperates with the rotating shaft 5, the stirring blade 6 and the motor 4 to stir and add the liquid until it is fully mixed, and then heated to more than 95°C before application.

[0062] The relevant indicators of the prepared liquid medicine without adding water are as follows:

[0063] Appearance: light yellow transparent mucus;

[0064] pH: 8.5-12;

[0065] HLB: 10-13;

[0066] Density: 0.955-1.03.

[0067] (2) Construction:

[0068] ①. After the oil well and the liquid dispensing tank pipeline are connected on site (i.e. the discharge pipe 8 of the dispensing box 1 is connected to the cleaning pipeline), the reagent in the liquid dispensing tank is injected into the oil well and then circulated to clean the pumping pipe rod. Until the pressure drop of the circulation pump inlet and outlet reaches the normal value. The time is about 3-6 hours (or determined according to the actual situation).

[0069] ②After the above process is completed, the well is opened for oil pumping and trial production. At the same time, the parameters of the oil wellhead (liquid volume, oil-water ratio, and oil pump current) are recorded.

[0070] (III) Daily maintenance of oil wells (anti-wax)

[0071] Wellhead conditions: There is a dosing tank at the wellhead (a small plunger pump is required for high casing pressure)

[0072] Method: After the first online circulation cleaning of the oil well, depending on the change of the oil well pump current, 35kg / day of medicine can be continuously added to the wellhead medicine tank every day after 1-2 days (depending on the well conditions, it can be reduced to 25kg, 20kg, etc.).

[0073] Dosage:

[0074] This mine test is planned to be carried out in one well in each of the three oil production teams (27#, 28#, 30#) for a period of one month.

[0075] Circulation cleaning: 1.3t / well.

[0076] Daily protection: 35kg / day

[0077] The test time of this mine: one month. The total amount of reagents required: 2.35t×3 wells=7.05t

[0078] Mobile charge 0.5t

[0079] Total amount of medicine: 7.55t

[0080] Example 2

[0081] Different from Example 1, the following raw materials of dispersant weight composition were used, and the experiment was conducted in oil wells numbered 29#, 31#, and 32# in the mine:

[0082]

[0083] Example 3

[0084] Different from Example 1, the following raw materials of dispersant weight composition were used, and the experiment was conducted in oil wells numbered 33#, 34#, and 35# in the mine:

[0085] The dispersant includes the following raw materials by weight:

[0086]

[0087] Comparative Example 1

[0088] Different from Example 1, a group of wax removal extractants for oil wells were randomly selected from the market and cleaned using the current conventional cleaning method, corresponding to oil wells numbered 36#, 37#, and 38#.

[0089] Comparative Example 2

[0090] Different from Example 1, a group of oil well dewaxing extractants were randomly selected from the market and cleaned using the current conventional cleaning method, corresponding to oil wells No. 39, No. 40, and No. 41.

[0091] Comparative Example 3

[0092] Different from Example 1, a group of wax removal extractants for oil wells were randomly selected from the market and cleaned using the current conventional cleaning method, corresponding to oil wells numbered 42#, 43#, and 47#.

[0093] It should be noted that the wax removal extractants randomly selected in Comparative Examples 1-3 are three groups of wax removal extractants of different brands.

[0094] After cleaning, the cleaning effect and other parameters in the embodiment and the comparative example were tested to obtain the following comparison table:

[0095] It should be noted that the data in the table below were measured at the same mine on the same day at the same time period to minimize the data error;

[0096]

[0097] From the data in the above table, it can be known that the three groups of embodiments of the present invention have achieved good results in anti-wax rate, and the anti-wax effect of the component ratio in embodiment 3 is the best.

[0098] It should be noted that the present invention, through the setting of a unique raw material formula and a unique water adding structure 3, in combination with a preparation method, can effectively solve the problems of high water content in oil wells and a large amount of heavy components in the mixed liquid, severe wax deposition in oil wells, and deposited asphaltene and wax with high carbon number and hard quality, which are difficult to remove by hot washing; conventional wax removal and prevention agents are ineffective; they cause a large operating load on the oil pump, resulting in high back pressure in the oil wells, frequent and high cost of oil well maintenance, and affecting oil production; the agent of the present invention can effectively remove and prevent this problem, reduce oil well maintenance, be safe and environmentally friendly, save costs while solving this problem, and increase production.

[0099] In summary, the use principle of the present invention is as follows: when preparing the liquid medicine, the user can add the raw materials of the liquid medicine into the preparation box 1 through the feed frame 2, start the motor 4 to drive the rotating shaft 5 to rotate, and drive the stirring blade 6 to rotate through the rotating shaft 5, and the stirring blade 6 fully mixes and stirs the materials inside the preparation box 1. At the same time, the interior of the preparation box 1 is heated to between 80°C and 115°C through the heating tube 7, and the stirring time is controlled to be 30min-90min. After the stirring is completed, the discharge solenoid valve 9 is opened, and the liquid medicine is discharged through the discharge pipe 8 and packed into a 25kg plastic barrel or a 200L galvanized iron barrel;

[0100] When it is needed in oil production, city water is added through the feed frame 2, and the water eventually flows into the interior of the preparation box 1. After that, the liquid medicine can be pumped into one end of the water inlet pipe 31, and the water supply solenoid valve 38 is opened to introduce the liquid medicine. The liquid medicine flows into the interior of the positioning frame 32 and the rotating tube 33 through the water inlet pipe 31. During the adding process, the motor 4 is started synchronously to drive the rotating shaft 5 to rotate, and the rotating shaft 5 drives the stirring blade 6 to rotate to dilute and stir the liquid medicine. During the rotation of the rotating shaft 5, the driving gear 36 is driven to rotate, and the driving gear 36 drives the transmission gear 37 to rotate, and the transmission gear 37 drives the inner gear ring 35 to rotate, and the rotating tube 33 is driven to rotate through the inner gear ring 35, so that the liquid medicine is evenly sprayed on the interior of the preparation box 1, and the liquid medicine inside the preparation box 1 is more evenly mixed and stirred, so as to achieve the effect of accelerating the mixing and stirring, so that the liquid medicine and water are quickly mixed to the required state. During the stirring process, heat is synchronously generated by the heating tube 7 to achieve the effect of rapid mixing.

[0101] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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 nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water-containing shale oil and gas wells, characterized in that: The raw materials include the following weight components: The dispersant liquid is used to remove wax and scale from pipelines and mining tools in oil production; When preparing the dispersant, water needs to be added for mixing, and the amount of water added is 8 to 15 times that of the drug solution.

2. The nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells according to claim 1, characterized in that: The dispersant includes the following raw materials by weight:

3. The nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells according to claim 1, characterized in that: The dispersant includes the following raw materials by weight:

4. The nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells according to claim 1, characterized in that: The dispersant includes the following raw materials by weight:

5. A method for preparing a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells, which is used to prepare the nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells as claimed in any one of claims 1 to 4, characterized in that: The preparation method comprises the following steps: Step 1: Preparation: Prepare the raw materials of the corresponding components, a set of mixing devices and a set of extraction towers; Step 2: Mixing and extraction: The corresponding raw materials are mixed in sequence through a mixing device, and after being fully mixed, they are extracted into an extraction tower to the nanometer level, and then packed into a 25kg plastic barrel or a 200L galvanized iron barrel; Step 3: Preparation and application: Pump the prepared liquid medicine into the mixing device and mix it thoroughly with the corresponding amount of water.

6. The method for preparing a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells according to claim 5, characterized in that: The mixing device comprises a preparation box (1), the upper end of the preparation box (1) is fixedly connected to a feed frame (2) for adding water, the upper end of the preparation box (1) is fixedly connected to a motor (4), and the upper end surface of the preparation box (1) is provided with a water adding structure (3); The water adding structure (3) comprises a water inlet pipe (31) penetrating through the outer shell of the preparation box (1); the lower end of the water inlet pipe (31) is fixedly connected to a positioning frame (32); the surface of the positioning frame (32) is rotatably connected to a rotating pipe (33); the lower end of the rotating pipe (33) is fixedly connected to a spray head (34); the inner side of the rotating pipe (33) is fixedly connected to an inner gear ring (35); the surface of the rotating shaft (5) is fixedly connected to a driving gear (36); a transmission gear (37) is meshedly connected between the driving gear (36) and the inner gear ring (35); and the outer surface of the water inlet pipe (31) is fixedly connected to a water supply solenoid valve (38).

7. The method for preparing a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells according to claim 6, characterized in that: The preparation box (1) is rotatably connected to a rotating shaft (5), and the outer surface of the rotating shaft (5) is fixedly connected to a stirring blade (6). A plurality of groups of heating tubes (7) in an annular array are arranged in the inner interlayer of the preparation box (1). A discharge pipe (8) is fixedly connected to the lower end of the preparation box (1), and a discharge solenoid valve (9) is fixedly connected to the outer surface of the discharge pipe (8).

8. The method for preparing a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells according to claim 7, characterized in that: The water inlet pipe (31) is fixed to the preparation box (1) by bolts, the positioning frame (32) is fixedly connected to the preparation box (1) by a bracket, the rotating tube (33) rotates along the arc direction of the positioning frame (32), the transmission gear (37) is fixed to the preparation box (1) by a bracket, the transmission gear (37) is rotatably connected to the bracket, one end of the rotating shaft (5) is fixedly connected to the output end of the motor (4), and the rotating shaft (5) is driven to rotate by the motor (4).

9. The method for preparing a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells according to claim 8, characterized in that: In step 2, the mixture is stirred by a stirring blade (6), and the temperature is kept between 80° C. and 115° C. by a heating tube (7), and the stirring time is 30 min to 90 min. In step 3, the required amount of water is first added, and then the extractant liquid is added. Finally, the water adding structure (3) cooperates with the rotating shaft (5), the stirring blade (6) and the motor (4) to stir and add the liquid until it is fully mixed, and at the same time, it is heated to more than 95° C. before use.

10. The method for preparing a nano-extraction dispersant for preventing ultra-high pour point wax and scale in high water content shale oil and gas wells according to claim 5, characterized in that: The relevant indicators of the prepared liquid medicine without adding water are as follows: Appearance: light yellow transparent mucus; pH: 8.5-12; HLB: 10-13; Density: 0.955-1.03.

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