Oil pipe paraffin removal device and method

Abstract

The invention discloses an oil pipe paraffin removal device and method. The oil pipe paraffin removal device comprises a pipeline, a first valve body and a plurality of second valve bodies, the first valve body is arranged at one end of the pipeline, and the second valve bodies are sequentially arranged at intervals in the length direction of the pipeline. Based on the oil pipe paraffin removal device, the method comprises the steps that a pipeline is put into an oil pipe, a first valve body and a plurality of second valve bodies are closed, and fluid is input into the pipeline; if paraffin removal of the oil pipe is not completed, the first valve body is opened, and fluid in the pipeline is discharged to the oil pipe through the first valve body; and if the pressure of the fluid in the pipeline reaches the first preset pressure, the second valve bodies are opened, and the fluid in the pipeline is discharged to the oil pipe through the second valve bodies. A corresponding paraffin removal scheme is implemented according to the severity of paraffin precipitation in the oil pipe, and the paraffin removal effect on the oil pipe is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of oilfield exploitation, and particularly relates to a tubing paraffin removal device and method. Background Art

[0002] In oil exploitation, as the temperature and pressure of the oil decrease and gas precipitates, paraffin in the oil will precipitate and adhere to the inner wall of the tubing of the oil production equipment, resulting in paraffin deposition. If the paraffin deposition is not treated, it will reduce the flow rate of the tubing, reduce the output of the oil production equipment, and at the same time increase the load of the oil production equipment, causing production accidents.

[0003] In the prior art, paraffin removal is usually achieved by methods such as returning to the factory for paraffin removal, hot washing paraffin removal, manual paraffin removal, chemical paraffin removal, and biological paraffin removal. Among them, when the tubing is blocked by paraffin deposition, only the operation can be stopped and the tubing can be returned to the factory for paraffin removal, which affects the working stability of the oil production equipment, and the tubing blockage will cause damage to the oil production equipment and shorten the service life of the oil production equipment. Summary of the Invention

[0004] The embodiments of this application aim to provide a tubing paraffin removal device and method, which can at least improve the working stability of the oil production equipment and extend the service life of the oil production equipment.

[0005] The embodiments of this application solve the above technical problems by adopting the following technical solutions:

[0006] In a first aspect, the embodiments of this application provide a tubing paraffin removal method, which is applied to a tubing paraffin removal device. The tubing paraffin removal device includes a pipeline, a first valve body, and a plurality of second valve bodies. The first valve body is arranged at one end of the pipeline, and the plurality of second valve bodies are arranged at intervals in sequence along the length direction of the pipeline. The method includes: putting the pipeline into the tubing, closing both the first valve body and the plurality of second valve bodies, and inputting a fluid into the pipeline; if the tubing paraffin removal is not completed, opening the first valve body to discharge the fluid in the pipeline to the tubing through the first valve body; if the pressure of the fluid in the pipeline reaches a first preset pressure, opening the plurality of second valve bodies to discharge the fluid in the pipeline to the tubing through the plurality of second valve bodies.

[0007] In some embodiments, the inputting the fluid into the pipeline includes: heating the fluid and then inputting it into the pipeline, or heating the fluid after inputting it into the pipeline; and / or, the opening of the first valve body includes: pressurizing the fluid in the pipeline to the opening pressure of the first valve body, and the first valve body opens; and / or, the opening of the plurality of second valve bodies includes: when the pressure of the fluid in the pipeline rises to the opening pressure of a corresponding second valve body, the corresponding second valve body opens.

[0008] In some embodiments, after the first valve body is opened, it includes: continuously introducing fluid into the pipeline; if the fluid pressure in the pipeline is greater than the opening pressure of the first valve body, the first valve body remains open; if the fluid pressure in the pipeline is less than the opening pressure of the first valve body, it is determined that the wax removal of the oil pipe is completed, and the first valve body is closed.

[0009] In some embodiments, in the direction from the end close to the first valve body towards the end away from the first valve body, the opening pressures of the plurality of second valve bodies increase in sequence; among them, the opening pressure of the second valve body closest to the first valve body is equal to the first preset pressure, and the opening pressure of the first valve body is less than the first preset pressure.

[0010] In some embodiments, the opening of the plurality of second valve bodies includes: when the fluid pressure in the pipeline rises to the opening pressure of a corresponding second valve body, the corresponding second valve body opens; the when the fluid pressure in the pipeline rises to the opening pressure of a corresponding second valve body, the corresponding second valve body opens, including: after the first valve body is opened, continuously inputting fluid into the pipeline; if the wax removal of the oil pipe is not completed, the pressure of the fluid in the pipeline is continuously increased, and the plurality of second valve bodies are opened in sequence.

[0011] In some embodiments, after introducing fluid into the pipeline, the method further includes: detecting the working current of the oil production equipment, and judging whether the wax removal of the oil pipe is completed according to the working current.

[0012] In some embodiments, the judging whether the wax removal of the oil pipe is completed according to the working current includes: judging whether the working current is greater than a preset current; if the working current is less than or equal to the preset current, it is judged that the wax removal of the oil pipe is completed; if the working current is greater than the preset current, it is judged that the wax removal of the oil pipe is not completed.

[0013] In some embodiments, after the plurality of second valve bodies are opened, the method further includes: judging whether the wax removal of the oil pipe is completed according to the fluid pressure in the pipeline; if the fluid pressure in the pipeline is less than the opening pressure of the first valve body, it is determined that the wax removal of the oil pipe is completed, and the first valve body and the plurality of second valve bodies are both closed; if the fluid pressure in the pipeline is greater than or equal to the first preset pressure, it is determined that the wax removal of the oil pipe is not completed, and the first valve body and at least one of the second valve bodies remain open.

[0014] In some embodiments, the method further includes: if the fluid pressure in the pipeline reaches a second preset pressure, driving the pipeline to move in the opening direction of the oil pipe.

[0015] In some embodiments, driving the pipe to move towards the opening direction of the oil pipe includes: driving the pipe to move towards the opening direction of the oil pipe, and the first valve body and the plurality of second valve bodies move along with the pipe, and the first valve body and the plurality of second valve bodies discharge fluid into the oil pipe to wash the inner wall of the oil pipe; wherein, the second preset pressure is greater than the opening pressure of the plurality of second valve bodies.

[0016] In a second aspect, an oil pipe paraffin removal device provided by an embodiment of the present application includes a pipe, a first valve body, and a plurality of second valve bodies. The first valve body is arranged at one end of the pipe, and the plurality of second valve bodies are sequentially arranged at intervals along the length direction of the pipe. The oil pipe paraffin removal device is based on the pipe, the first valve body, and the plurality of second valve bodies and is used to support the implementation of the above-mentioned oil pipe paraffin removal method.

[0017] For the oil pipe paraffin removal device and method of the embodiments of the present application, by placing a pipe in the oil pipe and arranging a first valve body and a plurality of second valve bodies sequentially at intervals along the length direction of the pipe, corresponding paraffin removal schemes are implemented according to the severity of paraffin wax formation in the oil pipe. When the degree of paraffin wax formation in the oil pipe is relatively slight, only fluid needs to be input into the pipe to melt the paraffin wax blocks in the oil pipe; when the degree of paraffin wax formation in the oil pipe is relatively severe, the first valve body and the plurality of second valve bodies can be sequentially opened to wash the oil pipe to ensure the paraffin removal effect on the oil pipe.

[0018] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. Description of the Drawings

[0019] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the drawings do not constitute a proportional limitation.

[0020] Figure 1 is a schematic structural diagram of the oil pipe paraffin removal device of the embodiment of the present application cooperating with the oil pipe;

[0021] Figure 2 is Figure 1 a three-dimensional schematic diagram of the driving component in

[0022] Figure 3 is Figure 1 a planar schematic diagram of the driving component in

[0023] Figure 4It is a flowchart of a method for removing paraffin from oil pipes according to an embodiment of the present application;

[0024] Figure 5 is Figure 4 a refined flowchart of the method for removing paraffin from the oil pipe in

[0025] The reference numerals in the specific embodiments are as follows:

[0026] 100, oil pipe paraffin removal device;

[0027] 1, pipeline assembly; 11, pipeline; 12, first valve body; 13, second valve body;

[0028] 2, drive assembly; 21, bracket; 22, reel; 221, water outlet; 23, drive member; 24, first guide wheel; 25, second guide wheel; 26, joint;

[0029] 3, liquid injection assembly; 31, pressure booster; 32, heater; 33, liquid storage cylinder; 34, connecting pipe;

[0030] 4, controller;

[0031] 5, third valve body;

[0032] 200, oil production equipment; 210, oil pipe; 220, fluid pump; 230, control cabinet. Specific embodiments

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the following further elaborates on the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. It should be noted that if there is no conflict, the various features in the embodiments of the present application can be combined with each other, and all are within the protection scope of the present application. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different module division from that in the device schematic diagram or a different order from that in the flowchart.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0036] In the description of the embodiments of this application, the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning, and therefore should not be construed as a limitation on the protection scope of this application. In the description of the embodiments of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0037] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not used to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0038] In addition, the technical features involved in different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0039] Please refer to Figure 1 , an oil pipe paraffin removal device 100 is provided in an embodiment of this application, which is used to remove paraffin from the oil pipe 210 of the oil production equipment 200. For the convenience of understanding the technical solution and working principle of the oil pipe paraffin removal device 100, a brief description of the structure of the oil production equipment 200 is given:

[0040] Please refer to Figure 1The oil production equipment 200 includes an oil pipe 210, a fluid pump 220 and a control cabinet 230. The fluid pump 220 is connected to the oil pipe 210, and the fluid pump 220 can extract the fluid in the well and transport the fluid to the well through the oil pipe 210, thereby realizing oil production. The control cabinet 230 is electrically connected to the fluid pump 220, and the control cabinet 230 can detect the working current of the fluid pump 220 when it is working. When the fluid pump 220 is working, if the resistance encountered by the fluid pump 220 is large, the working current of the fluid pump 220 will increase, that is, by detecting the working current of the fluid pump 220, the severity of wax deposition in the oil pipe 210 can be judged.

[0041] The specific structure of the oil pipe wax cleaning device 100 is described in detail below.

[0042] The oil pipe wax removal device 100 includes a pipe assembly 1, a drive assembly 2 and a liquid injection assembly 3. The pipe assembly 1 includes a pipe 11, a first valve body 12 and a plurality of second valve bodies 13. The first valve body 12 is arranged at one end of the pipe 11, and the plurality of second valve bodies 13 are arranged in sequence along the length direction of the pipe 11. The pipe 11 is used to be placed in the oil pipe 210. The drive assembly 2 is connected to the end of the pipe 11 away from the first valve body 12, and the drive assembly 2 is used to drive the pipe 11 to move in the oil pipe 210. The liquid injection assembly 3 is connected to the end of the pipe 11 away from the first valve body 12, and the liquid injection assembly 3 is used to input fluid into the pipe 11.

[0043] For the above pipeline component 1, see Figure 1 The outer diameter of the pipeline component 1 is smaller than the inner diameter of the oil pipe 210 , so the pipeline component 1 can be inserted into the oil pipe 210 , and there is a gap between the pipeline component 1 and the oil pipe 210 for fluid to pass through, which does not affect the oil production work of the oil pipe 210 .

[0044] As for the first valve body 12 and the second valve body 13, the first valve body 12 and the second valve body 13 can be opened so that the fluid in the pipeline 11 enters the oil pipe 210 to flush the wax deposits in the oil pipe 210, thereby improving the wax removal efficiency. Among them, the first valve body 12 is arranged at the end of the pipeline 11 facing downhole. When the oil pipe 210 is blocked with wax, the first valve body 12 can be opened to flush from below the wax blockage, so that the oil pipe 210 is pressurized to flush the wax deposits, thereby improving the efficiency of cleaning the oil pipe 210. Several second valve bodies 13 are all arranged on the side of the first valve body 12 facing uphole, and several second valve bodies 13 are arranged in sequence at intervals, so that different positions of the oil pipe 210 can be flushed.

[0045] In some embodiments, there are multiple first valve bodies 12, which are spaced apart around the circumference of the pipeline 11. The multiple first valve bodies 12 surrounding the pipeline 11 can be opened simultaneously to spray fluid into the oil pipe 210, thereby improving the wax removal efficiency.

[0046] In some embodiments, a plurality of second valve bodies 13 form a plurality of second valve body groups, and the plurality of second valve body groups are arranged at intervals in sequence along the length direction of the pipeline 11. Each second valve body group includes a plurality of second valve bodies 13. In each second valve body group, the plurality of second valve bodies 13 are arranged at intervals along the circumferential direction of the pipeline 11, and the plurality of second valve bodies 13 can be opened simultaneously to spray fluid into the oil pipe 210, further improving the wax cleaning efficiency.

[0047] For the above-mentioned driving assembly 2, please refer to Figure 2 and Figure 3 , the driving assembly 2 includes a bracket 21, a winding drum 22 and a driving member 23. The winding drum 22 is rotatably arranged on the bracket 21, and one end of the pipeline 11 away from the first valve body 12 is wound around the winding drum 22; the driving member 23 is connected to the winding drum 22, and the driving member 23 can drive the winding drum 22 to rotate relative to the bracket 21 to wind one end of the pipeline 11 around the winding drum 22 and drive the other end of the pipeline 11 to move in the oil pipe 210. The driving member 23 can also drive the winding drum 22 to reverse and unwind the pipeline 11 into the oil pipe 210 so that the pipeline 11 is threaded through the oil pipe 210. By driving the winding drum 22 to rotate by the driving member 23, the winding and unwinding of the pipeline 11 can be realized.

[0048] Among them, the pipeline 11 can be made of a flexible material, such as a rubber tube, a flexible steel pipe, etc., so as to facilitate the winding of the pipeline 11 around the winding drum 22.

[0049] Among them, the driving member 23 is a servo motor. The driving member 23 can drive the winding drum 22 to rotate and can control the rotation angle of the winding drum 22, so as to thread the pipeline 11 through a preset position in the oil pipe 210. It can be understood that in some other embodiments, the driving member 23 can also be other structures, such as a stepping motor, a rotary cylinder, etc., which are not limited herein.

[0050] In some embodiments, please refer to Figure 2 and Figure 3 , the winding drum 22 includes a water inlet (not shown) and a water outlet 221 that are communicated with each other, and the water outlet 221 is communicated with the pipeline 11; the driving assembly 2 further includes a joint 26, and both ends of the joint 26 are respectively communicated with the water inlet and the liquid injection assembly 3, and the winding drum 22 can rotate relative to the joint 26. Specifically, a channel (not shown in the figure) for fluid to pass through is provided inside the winding drum 22, and the water inlet and the water outlet 221 are respectively arranged at both ends of the channel. Among them, the water inlet is arranged on the end face of the winding drum 22, which is convenient for the installation of the joint 26 and can avoid interference with the winding drum 22 caused by the joint 26 and the liquid injection assembly 3 when the winding drum 22 rotates. The water outlet 221 is arranged on the outer peripheral surface of the winding drum 22, and one end of the pipeline 11 is connected to the water outlet 221, which is convenient for winding the pipeline 11 around the outer peripheral surface of the winding drum 22.

[0051] In some embodiments, please refer to Figure 2 andFigure 3 The driving assembly 2 further includes a first guide wheel 24. The first guide wheel 24 is rotatably arranged on the bracket 21. The rotation axis of the first guide wheel 24 is parallel to the rotation axis of the reel 22. The first guide wheel 24 is arranged on one side of the reel 22 in the radial direction. The pipeline 11 passes around the reel 22 after passing through the first guide wheel 24. The first guide wheel 24 can change the direction of the pipeline 11 and support the pipeline 11, making the direction of the pipeline 11 more reasonable, thereby reducing the friction force when the reel 22 winds and unwinds the pipeline.

[0052] In some embodiments, please refer to Figure 1 The driving assembly 2 further includes a second guide wheel 25. The rotation axis of the second guide wheel 25 is parallel to the rotation axis of the reel 22. The second guide wheel 25 is arranged on one side of the reel 22 in the radial direction. The second guide wheel 25 is used to guide the pipeline 11 from above the oil pipe 210 to the reel 22. In practical applications, the reel 22 is generally arranged on one side of the oil pipe 210 in the radial direction, and the second guide wheel 25 is arranged above the oil pipe 210, which can guide the pipeline 11 extending out of the oil pipe 210 to the reel 22, so as to facilitate the winding and unwinding of the pipeline 11 and avoid the pipeline 11 from being entangled or damaged.

[0053] In some embodiments, the number of the pipeline assemblies 1 and the number of the driving assemblies 2 are respectively several. Each pipeline assembly 1 is connected to a corresponding driving assembly 2, and several pipeline assemblies 1 are respectively connected to the liquid injection assembly 3. Thus, the oil pipe wax cleaning device 100 can clean the wax of multiple oil pipes 210 at the same time, and multiple pipeline assemblies 1 can share one liquid injection assembly 3 and one controller, which is beneficial to reducing the use cost and realizing common control.

[0054] In some embodiments, please refer to Figure 2 and Figure 3 The oil pipe wax cleaning device further includes several third valve bodies 5. One end of the pipeline 11 of each pipeline assembly 1 departing from the first valve body 12 is connected to a corresponding third valve body 5. Specifically, the third valve body 5 is arranged between the liquid injection assembly 3 and the joint 26, so as to control the fluid in the liquid injection assembly 3 to enter the pipeline assembly 1. When the number of the pipeline assemblies 1 is multiple, by respectively controlling each third valve body 5, it is possible to independently control whether each pipeline assembly 1 is filled with fluid. In some other embodiments, the third valve body 5 can also be directly arranged on the pipeline 11 or the liquid injection assembly 3, which is not limited herein.

[0055] For the above-mentioned liquid injection assembly 3, please refer to Figure 1, the liquid injection assembly 3 includes a pressurizer 31 and a heater 32. The pressurizer 31 is connected to the pipeline 11, and the pressurizer 31 is used to pressurize the fluid flowing into the pipeline 11; the heater 32 is connected to the pipeline 11, and the heater 32 is used to heat the fluid flowing into the pipeline 11. Among them, the pressurizer 31 can be connected between the heater 32 and the pipeline 11 that can be connected, that is, the fluid is heated first and then pressurized. The heater 32 can be set according to actual needs, such as a cast aluminum heater, a cup heater, an aluminum plate stacked heater, a ceramic heater, an infrared heater, a glass tube heater, and an electromagnetic heater, etc., to heat the fluid flowing into it. The pressurizer 31 can be set according to actual needs, such as including a spiral booster pump, a turbocharger pump, etc., to increase the pressure of the fluid when the fluid is transported to the pipeline assembly 1. It can be understood that the liquid injection assembly 3 may not include the pressurizer 31 and / or the heater 32, that is, the fluid is heated or pressurized by an external device.

[0056] In some embodiments, the fluid can be heated to a preset temperature by the heater 32, and then the pressurizer 31 is turned on to pressurize the fluid to ensure that the fluid flowing into the pipeline 11 has a relatively high temperature. Among them, the fluid can be a liquid, a gas or a liquid-gas mixture, such as fresh water, oil, steam, oil-gas mixture, etc., as long as it can conduct heat to the pipeline 11.

[0057] In some embodiments, please refer to Figure 1 , the liquid injection assembly 3 includes a liquid storage cylinder 33, and the liquid storage cylinder 33 is connected to the pipeline 11. The liquid storage cylinder 33 is also connected to the pressurizer 31 and the heater 32, and the liquid storage cylinder 33 is used to store the fluid to provide the fluid for the pressurizer 31 and the heater 32.

[0058] In some embodiments, please continue to refer to Figure 1 , the liquid injection assembly 3 further includes a plurality of connecting pipes 34. One end of the connecting pipe 34 is connected to the liquid storage cylinder 33, the other end of the connecting pipe 34 is connected to the joint 26, and the pressurizer 31 and the heater 32 are respectively connected to the middle of the connecting pipe 34, so that the fluid in the liquid storage cylinder 33 can flow into the pressurizer 31 and the heater 32 through the connecting pipe 34, and the fluid in the pressurizer 31 and the heater 32 can flow into the pipeline 11 through the connecting pipe 34, the joint 26, and the channel in the reel 22 in sequence. It can be understood that in some other embodiments, the pressurizer 31 and the heater 32 can also be arranged at one end of the connecting pipe 34, and the liquid storage cylinder 33 can be arranged in the middle of the connecting pipe 34 to store the fluid after heating and / or pressurizing in the liquid storage cylinder 33. The connection sequence of the pressurizer 31, the heater 32, and the liquid storage cylinder 33 can be set according to actual needs and will not be limited here.

[0059] In some embodiments, please refer to Figure 1, the tubing paraffin removal device 100 further includes a controller 4. The controller 4 is electrically connected to the driving component 2 and the liquid injection component 3, and the controller 4 can respectively control the driving component 2 and the liquid injection component 3 to be turned on or off. Furthermore, the working states of the driving component 2 and the liquid injection component 3 can be controlled. For example, the driving component 2 can be controlled to drive the pipeline 11 to move within the tubing 210, and the liquid injection component 3 can be controlled to input fluid into the pipeline 11. It can be understood that in some other embodiments of the present application, the controller 4 can be omitted, and the above-mentioned driving component 2 and liquid injection component 3 can be manually controlled, which does not affect the function of the tubing paraffin removal device 100.

[0060] In some embodiments, the control cabinet 230 includes a controller 4, that is, the controller 4 is disposed within the control cabinet 230. The controller 4 is electrically connected to the fluid pump 220, the driving component 2, and the liquid injection component 3 respectively, and the fluid pump 220, the driving component 2, and the liquid injection component 3 are integrally controlled through the controller 4. The controller 4 can be used to control the fluid pump 220 to operate and to obtain the working current of the fluid pump 220. The controller 4 can obtain the working current of the fluid pump 220, thereby judging the severity of wax deposition in the tubing 210, and can control the driving component 2 and the liquid injection component 3 to work according to the severity of wax deposition in the tubing 210 to implement corresponding paraffin removal solutions.

[0061] When the wax deposition degree in the tubing 210 is relatively slight, only the liquid injection component 3 needs to be used to input fluid into the pipeline 11 to heat the pipeline 11 to melt the wax blocks in the tubing 210; when the wax deposition degree in the tubing 210 is relatively severe, the first valve body 12 and the second valve body 13 can be opened to flush the tubing 210; when the wax deposition in the tubing 210 is particularly severe, while inputting fluid into the tubing 210, the driving component 2 can be used to drive the pipeline 11 to move within the tubing 210, so that the first valve body 12 and the second valve body 13 on the pipeline 11 are close to the wax deposition location for flushing, thereby improving the paraffin removal effect. Among them, the power of the heating fluid can also be controlled according to the severity of wax deposition in the tubing 210, which can not only reduce the energy consumption generated by the heating fluid, but also ensure the paraffin removal effect on the tubing 210.

[0062] It can be understood that in some other embodiments, the controller 4 may not be disposed within the control cabinet 230 either. For example, it can be disposed on the fluid pump 220 or within the driving component 2. The controller 4 is electrically connected to the control cabinet 230, and the setting method of the controller 4 can be selected according to actual needs and is not limited herein.

[0063] It can be understood that in some other embodiments, the number of the controllers 4 can be multiple. For example, the fluid pump 220, the driving component 2, and the liquid injection component 3 are respectively provided with a controller 4 alone, and the multiple controllers 4 are respectively electrically connected to the control cabinet 230. The setting number of the controllers 4 can be selected according to actual needs and is not limited herein.

[0064] In some embodiments, the first valve body 12 and several second valve bodies 13 are pressure valves respectively, that is, valves that can be automatically opened under a certain pressure. When the pressure of the fluid in the pipeline 11 is greater than or equal to the opening pressure of the first valve body 12, the first valve body 12 will automatically open, allowing the fluid to spray out from the first valve body 12; when the pressure of the fluid in the pipeline 11 is greater than or equal to the opening pressure of several second valve bodies 13, several second valve bodies 13 will automatically open, allowing the fluid to spray out from the second valve bodies 13.

[0065] It can be understood that, in some other embodiments, the first valve body 12 and several second valve bodies 13 can also be electronic valves. The controller 4 is electrically connected to the first valve body 12 and several second valve bodies 13, and the first valve body 12 and several second valve bodies 13 can be respectively controlled to open or close through the controller 4.

[0066] In some embodiments, the opening pressures of several second valve bodies 13 are all greater than the opening pressure of the first valve body 12, and in the direction from the end close to the first valve body 12 to the end far from the first valve body 12, the opening pressures of several second valve bodies 13 increase in sequence. Specifically, when cleaning the oil pipe 210, first open the first valve body 12 to input fluid into the oil pipe 210. If the waxed area is not washed through, the pressure of the fluid in the oil pipe 210 will gradually increase, and then the pressure of the fluid in the pipeline 11 will also gradually increase; as the pressure of the fluid in the pipeline 11 increases, several second valve bodies 13 will also be automatically opened from bottom to top in sequence, gradually enhancing the scouring effect on the oil pipe 210 until the oil pipe 210 is washed through. When the oil pipe 210 is washed through, the pressure of the fluid in the pipeline 11 decreases, and the first valve body 12 and several second valve bodies 13 are automatically closed from top to bottom in sequence. If the second valve body 13 at the topmost finally opens, it means that the fluid cannot wash through the oil pipe 210, and the pipeline 11 can be driven by the driving assembly 2 to move in the oil pipe 210 to remove wax from the oil pipe 210. It should be noted that the above direction from bottom to top is the direction from close to the first valve body 12 to far from the first valve body 12; the above direction from top to bottom is the direction from far from the first valve body 12 to close to the first valve body 12; the above second valve body at the topmost is the second valve body farthest from the first valve body 12.

[0067] Since the liquid in the pipeline 11 is flowing, the pressure of the fluid of the liquid in the pipeline 11 may not increase gradually along the direction of gravity. By making the opening pressure of the first valve body 12 smaller than the opening pressure of the second valve body 13, the problem that the first valve body 12 is not the first to open can be improved. And by making the opening pressures of several second valve bodies 13 increase from bottom to top in sequence, the problem that the second valve bodies 13 are not opened from bottom to top in sequence can be improved.

[0068] It is understandable that in some other embodiments, the opening pressure of the first valve body 12 and the opening pressures of several second valve bodies 13 may also be the same, or the opening pressure of the first valve body 12 is greater than the opening pressures of several second valve bodies 13. The opening pressure of the first valve body 12 and the opening pressures of several second valve bodies 13 can be set according to actual requirements and are not limited herein.

[0069] In some other embodiments, a heater is provided inside the pipe wall of the pipe 11, and the fluid can be heated after being input into the pipe 11, or the pipe 11 can be directly heated by the heater. The specific heating method for the pipe 11 is not limited herein.

[0070] The embodiment of the present application also provides an oil pipe paraffin removal method for removing paraffin from the oil pipe 210 based on the oil pipe paraffin removal device 100. Please refer to Figure 4 and Figure 5 , the oil pipe paraffin removal method includes:

[0071] S1: The pipe 11 is placed into the oil pipe 210, the first valve body 12 and several second valve bodies 13 are both closed, and fluid is input into the pipe 11;

[0072] S2: Detect whether the paraffin removal of the oil pipe 210 is completed;

[0073] If not, then execute method S3;

[0074] S3: The first valve body 12 is opened, so that the fluid in the pipe 11 is discharged into the oil pipe 210 through the first valve body 12;

[0075] S4: If the pressure of the fluid in the pipe 11 reaches the first preset pressure, several second valve bodies 13 are opened, so that the fluid in the pipe 11 is discharged into the oil pipe 210 through several second valve bodies 13;

[0076] S5: If the pressure of the fluid in the pipe 11 reaches the second preset pressure, drive the pipe 11 to move in the opening direction of the oil pipe 210.

[0077] In some embodiments, the method of S1 includes:

[0078] S11: The driving assembly 2 places the pipe 11 into the oil pipe 210, the first valve body 12 and several second valve bodies 13 are both closed, and the liquid injection assembly 3 heats the fluid;

[0079] S12: Open the third valve body 5 and input the heated fluid into the pipe 11.

[0080] Specifically, the driving member 23 drives the drum 22 to rotate so as to place the pipeline 11 into the oil pipe 210. The first valve body 12 and several second valve bodies 13 are all in the closed state. The heater 32 of the liquid injection assembly 3 heats the fluid to a preset temperature, and the third valve body 5 is opened so that the heated fluid is input into the pipeline 11 to heat the pipeline 11, thereby removing wax from the oil pipe 210. Herein, the preset temperature can be set according to actual requirements and is not limited herein. It can be understood that in some other embodiments, a heater 32 can also be provided in the pipeline 11, and the fluid is heated after being input into the pipeline 11.

[0081] In some embodiments, the method of S2 includes:

[0082] S21: After a preset time, detect the working current of the oil production equipment 200;

[0083] S22: Determine whether the working current is greater than the preset current;

[0084] If the working current is less than or equal to the preset current, it is determined that the wax removal of the oil pipe 210 is completed, and the wax removal ends;

[0085] If the working current is greater than the preset current, it is determined that the wax removal of the oil pipe 210 is not completed, and method S3 is executed.

[0086] Specifically, after the heated fluid heats the pipeline 11 for a preset time, the controller 4 detects the working current of the fluid pump 220 and determines whether the working current is greater than the preset current; if there is no wax blockage in the oil pipe 210, the working current of the fluid pump 220 is less than or equal to the preset current, and it is determined that the wax removal of the oil pipe 210 is completed; if there is wax blockage in the oil pipe 210, the working current of the fluid pump 220 will increase, that is, the working current of the fluid pump 220 is greater than the preset current, and it is determined that the wax removal of the oil pipe 210 is not completed. Herein, the preset current is greater than or equal to the working current, the preset current can be set according to actual requirements, and the preset time can be set according to actual requirements and is not limited herein.

[0087] In some embodiments, the severity of wax deposition in the oil pipe 210 can also be determined based on the detected working current. The greater the working current, the more severe the wax deposition in the oil pipe 210. The corresponding wax removal method can be selected according to the severity of wax deposition in the oil pipe 210, that is, one of methods S3, S4, and S5 is selected, or, two of methods S3, S4, and S5 are selected in combination, or, methods S3, S4, and S5 are selected to be executed simultaneously.

[0088] In some embodiments, after the heated fluid heats the pipeline 11 for a preset time, the controller 4 continuously detects the working current of the fluid pump 220; within the preset detection time, if the working current is always less than or equal to the preset current, it is determined that the wax removal of the oil pipe 210 is completed; if the working current continuously exceeds the preset current, it is determined that the wax removal cannot be completed by heating the pipeline 11, and method S3 needs to be executed. Among them, the preset detection time can be set according to actual needs and is not limited herein.

[0089] In some embodiments, the controller 4 detecting the working current of the fluid pump 220 can be carried out simultaneously with the step of inputting the heated fluid into the pipeline 11. Specifically, when inputting the heated fluid into the pipeline 11, within the preset detection time, the controller 4 continuously detects the working current of the fluid pump 220, and then determines whether the wax removal is completed.

[0090] In some embodiments, the method of S3 includes:

[0091] S31: The liquid injection assembly 3 pressurizes the fluid in the pipeline 11;

[0092] S32: Detect the pressure of the fluid in the pipeline 11 and determine whether the pressure of the fluid in the pipeline 11 reaches the opening pressure of the first valve body 12;

[0093] S33: If the pressure of the fluid in the pipeline 11 is greater than or equal to the opening pressure of the first valve body 12, the first valve body 12 opens, and the fluid in the pipeline 11 is discharged into the oil pipe 210 through the first valve body 12;

[0094] If the pressure of the fluid in the pipeline 11 is less than the opening pressure of the first valve body 12, the first valve body 12 remains closed.

[0095] Specifically, the pressurized fluid is input into the pipeline 11 through the pressure booster 31, the pressure of the fluid in the pipeline 11 is detected. If the pressure of the fluid in the pipeline 11 is less than the opening pressure of the first valve body 12, the first valve body 12 remains closed; the liquid injection assembly 3 continues to pressurize the fluid in the pipeline 11 until the pressure of the fluid at the lowermost end of the pipeline 11 is greater than or equal to the opening pressure of the first valve body 12, then the first valve body 12 automatically opens, continuously introducing fluid into the pipeline 11 and discharging it into the oil pipe 210 through the first valve body 12 to wash the wax deposits in the oil pipe 210. Among them, the fluid discharged from the first valve body 12 into the oil pipe 210 can be the fluid heated by the liquid injection assembly 3.

[0096] In some embodiments, after the method of S32, if the pressure of the fluid in the pipeline 11 is less than the opening pressure of the first valve body 12, it is determined that the wax removal of the oil pipe 210 is completed, and the wax removal ends.

[0097] In some embodiments, the first valve body 12 is a pressure valve, and the pressure of the fluid in the pipeline 11 can be detected through the first valve body 12. That is, the first valve body 12 is preset with an opening pressure. When the pressure of the fluid in the pipeline 11 is greater than the opening pressure of the first valve body 12, the fluid in the pipeline 11 pushes the valve core of the first valve body 12, so that the first valve body 12 automatically opens. It can be understood that in some other embodiments, a pressure detection device electrically connected to the first valve body 12 can also be additionally provided to detect the pressure of the fluid in the pipeline 11 and control the opening and closing of the first valve body 12.

[0098] In some embodiments, the fluid may not be pressurized by the pressurizer 31. For example, by continuously introducing the fluid into the pipeline 11 to increase the pressure of the fluid in the pipeline 11, so that the first valve body 12 opens.

[0099] It can be understood that in some embodiments, the method S1 can be executed periodically to realize regular wax cleaning in the oil pipe 210. Specifically, through the liquid injection assembly 3, the heated fluid is introduced into the pipeline 11 at regular intervals, thereby preventing or slowing down wax deposition in the oil pipe 210.

[0100] In some embodiments, after the first valve body 12 is opened in the method of S33, it further includes:

[0101] S331: Detect the pressure of the fluid in the pipeline 11 and judge whether the wax cleaning is completed;

[0102] If the pressure of the fluid in the pipeline 11 is less than the opening pressure of the first valve body 12, it is judged that the wax cleaning of the oil pipe 210 is completed, and the first valve body 12 is closed;

[0103] If the pressure of the fluid in the pipeline 11 is greater than or equal to the opening pressure of the first valve body 12, it is judged that the wax cleaning is not completed, and the first valve body 12 remains open.

[0104] Specifically, if the wax cleaning of the oil pipe 210 is completed, the fluid in the oil pipe 210 is lifted to the wellhead by the fluid pump 220, so that the pressure of the fluid in the pipeline 11 is reduced to less than the opening pressure of the first valve body 12, and the first valve body 12 automatically closes; if the wax cleaning in the oil pipe 210 is not completed, the pressure of the fluid in the pipeline 11 will continue to be greater than or equal to the opening pressure of the first valve body 12, so that the first valve body 12 remains open.

[0105] In some embodiments, the method of S3 further includes:

[0106] S34: Judge whether the pressure of the fluid in the pipeline 11 reaches the first preset pressure;

[0107] If the pressure of the fluid in the pipeline 11 is less than the first preset pressure, it is determined that the wax cleaning work can be completed by opening the first valve body 12, and the wax cleaning is ended;

[0108] If the pressure of the fluid in the pipeline 11 is greater than or equal to the first preset pressure, it is determined that the wax cleaning operation cannot be completed, and method S4 is executed.

[0109] After the first valve body 12 is opened, fluid is continuously input into the oil pipe 210. If the oil pipe 210 is clogged with wax, the pressure inside the oil pipe 210 will increase, and the pressure of the fluid in the pipeline 11 will continue to increase to be greater than or equal to the first preset pressure. That is, if the wax removal work cannot be completed by flushing the oil pipe 210 by opening the first valve body 12, method S4 is executed.

[0110] In some embodiments, the method of S4 includes:

[0111] S41 : a plurality of second valve bodies 13 are opened, and the fluid in the pipeline 11 is discharged into the oil pipe 210 through the plurality of second valve bodies 13 .

[0112] Specifically, when the fluid pressure in the pipeline 11 rises to a value greater than or equal to the first preset pressure, the plurality of second valve bodies 13 are opened, and the fluid is continuously introduced into the pipeline 11 and discharged into the oil pipe 210 through the plurality of second valve bodies 13, so that the fluid in the pipeline 11 is discharged from all locations along the length direction of the oil pipe 210 to flush the interior of the oil pipe 210 for wax removal. By providing a plurality of second valve bodies 13, the fluid can be discharged near the wax deposited area of ​​the oil pipe 210 for flushing, so that the fluid at the wax deposited area can maintain temperature and pressure, thereby saving energy consumption and enhancing the wax removal effect. Among them, the first preset pressure is greater than or equal to the opening pressure of the plurality of second valve bodies 13.

[0113] In some embodiments, the method of S41 further includes:

[0114] S4101: setting the opening pressures of a plurality of second valve bodies 13 respectively;

[0115] S4102: When the fluid in the pipeline 11 is pressurized to the opening pressure of a corresponding second valve body 13, the corresponding second valve body 13 is opened.

[0116] Specifically, several second valve bodies 13 are all pressure valves. In the direction from the end close to the first valve body 12 towards the end far from the first valve body 12, several second valve bodies 13 include a first second valve body 13, a second second valve body 13, a third second valve body 13... an Nth second valve body 13 arranged in sequence, and the opening pressures of several second valve bodies 13 increase in sequence. When the pressure in the pipeline 11 rises to the first preset pressure, the first second valve body 13 automatically opens; if the wax cleaning in the oil pipe 210 is not completed, the fluid pressure in the pipeline 11 continues to rise to the opening pressure of the second second valve body 13, causing the second second valve body 13 to automatically open; if the wax cleaning in the oil pipe 210 is still not completed, the fluid pressure in the pipeline 11 continues to rise to the opening pressure of the third second valve body 13, causing the third second valve body 13 to automatically open... until the fluid pressure in the pipeline 11 continues to rise to the opening pressure of the Nth second valve body 13, causing the Nth second valve body 13 to automatically open. Among them, the first preset pressure is equal to the opening pressure of the second valve body 13 closest to the first valve body 12, the opening pressures of several second valve bodies 13 are all greater than or equal to the first preset pressure, and the opening pressure of the first valve body 12 is less than the first preset pressure.

[0117] It can be understood that in some other embodiments, the opening pressures of several second valve bodies 13 can also be the same, that is, the opening pressures of several second valve bodies 13 are all equal to the first preset pressure. When the fluid pressure in the pipeline 11 is greater than or equal to the first preset pressure, several second valve bodies 13 open simultaneously to clean the inside of the oil pipe 210.

[0118] It can be understood that in some other embodiments, the opening pressures of several second valve bodies 13 can also be less than the opening pressure of the first valve body 12, that is, several second valve bodies 13 are opened first to flush the oil pipe 210, and when several second valve bodies 13 cannot complete the wax cleaning work on the oil pipe 210, the first valve body 12 is then opened to flush the oil pipe 210.

[0119] In some embodiments, in the method of S41, after several second valve bodies 13 are opened, it further includes:

[0120] S411: Detect the pressure of the fluid in the pipeline 11 and judge whether the wax cleaning of the oil pipe 210 is completed;

[0121] If the pressure of the fluid in the pipeline 11 is less than the opening pressure of the first valve body 12, it is judged that the wax cleaning of the oil pipe 210 is completed, and the first valve body 12 and several second valve bodies 13 are both closed;

[0122] If the pressure of the fluid in the pipeline 11 is greater than or equal to the first preset pressure, it is judged that the wax cleaning is not completed, and the first valve body 12 and at least one second valve body 13 remain open.

[0123] Specifically, during the wax removal process, if the waxed part of the tubing 210 is flushed through, causing the fluid pressure in the pipeline 11 to gradually decrease, several second valve bodies 13 will automatically close in sequence; if the fluid pressure in the pipeline 11 is greater than or equal to the opening pressure of the first valve body 12 and less than the first preset pressure, the first valve body 12 will open and several second valve bodies 13 will all close; if the wax removal of the tubing 210 is completed and the pressure of the fluid in the pipeline 11 drops to less than the opening pressure of the first valve body 12, the first valve body 12 and several second valve bodies 13 will all automatically close. If the wax removal in the tubing 210 is not completed, the pressure of the fluid in the pipeline 11 will continue to be greater than the first preset pressure, and the first valve body 12 and at least one second valve body 13 will remain open.

[0124] In some embodiments, the method of S4 further includes:

[0125] S42: Determine whether the pressure of the fluid in the detection pipeline 11 reaches the second preset pressure;

[0126] If the pressure of the fluid in the pipeline 11 is less than the second preset pressure, it is determined that the wax removal work can be completed by opening several second valve bodies 13, and the wax removal ends;

[0127] If the pressure of the fluid in the pipeline 11 is greater than or equal to the second preset pressure, it is determined that the wax removal work cannot be completed, and method S5 is executed.

[0128] Specifically, after several second valve bodies 13 are all opened, the wax removal in the tubing 210 is not completed, causing the pressure inside the tubing 210 to continue to rise, and further causing the fluid pressure in the pipeline 11 to continue to rise. That is, it is determined that the wax removal cannot be completed by flushing the tubing 210 by opening several second valve bodies 13, and method S5 is executed.

[0129] In some embodiments, the method of S5 includes:

[0130] S51: The driving assembly 2 drives the pipeline 11 to move in the opening direction of the tubing 210, and the first valve body 12 and several second valve bodies 13 move with the pipeline 11. The first valve body 12 and several second valve bodies 13 discharge fluid into the tubing 210 to flush the inner wall of the tubing 210.

[0131] Specifically, the driving member 23 drives the reel 22 to rotate, and the pipeline 11 is wound around the reel 22, causing the pipeline 11 to move towards the wellhead direction. The first valve body 12 and several second valve bodies 13 move within the oil pipe 210 following the pipeline 11. Wax deposits in the oil pipe 210 are scraped off by the pipeline 11, and the fluid flowing through the first valve body 12 and several second valve bodies 13 can flush the inner wall of the oil pipe 210 along the length direction of the oil pipe 210. It can be understood that the wax deposits adhere between the oil pipe 210 and the pipeline 11. By winding up the pipeline 11, the pipeline 11 moves within the oil pipe 210, and the wax deposits will break under the action force between the oil pipe 210 and the pipeline 11, and are flushed and melted by the fluid ejected from the first valve body 12 and the second valve bodies 13, thus accelerating the wax removal efficiency.

[0132] Wherein, the second preset pressure is greater than the first preset pressure, and the opening pressures of several second valve bodies 13 are all less than the second preset pressure. After several second valve bodies 13 are all opened, if the wax removal is not completed and the fluid pressure in the pipeline 11 continues to rise until the fluid pressure is greater than or equal to the second preset pressure, the controller 4 controls the driving member 23 of the driving assembly 2 to open, thereby driving the reel 22 to wind up the pipeline 11.

[0133] Wherein, the driving assembly 2 can also drive the pipeline 11 to move in a direction away from the opening of the oil pipe 210, that is, the driving assembly 2 drives the pipeline 11 to move within the oil pipe 210.

[0134] In some embodiments, the method of S5 further includes:

[0135] S52: Detect the pressure of the fluid in the pipeline 11 and determine whether the wax removal of the oil pipe 210 is completed;

[0136] If the pressure of the fluid in the pipeline 11 is less than the opening pressure of the first valve body 12, it is determined that the wax removal of the oil pipe 210 is completed, and the driving assembly 2 stops driving the pipeline 11;

[0137] If the pressure of the fluid in the pipeline 11 is greater than or equal to the opening pressure of the first valve body 12, it is determined that the wax removal is not completed, and the driving assembly 2 drives the pipeline 11 to move repeatedly in the oil well.

[0138] Specifically, when the wax deposition in the oil pipe 210 is serious, the driving assembly 2 can drive the pipeline 11 to move repeatedly within the oil pipe 210, that is, repeatedly wind up and unwind the pipeline 11 to fully remove the wax deposition in the oil pipe 210. After the wax removal in the oil pipe 210 is completed, the pipeline 11 is then unwound into the oil pipe 210.

[0139] It can be understood that in some other embodiments, when the driving component 2 drives the pipeline 11 to move within the oil pipe 210, the first valve body 12 and several second valve bodies 13 can be partially opened. For example, only the first valve body 12 is opened, or some of the second valve bodies 13 are opened, or all of the second valve bodies 13 are opened, or the first valve body 12 and some of the second valve bodies 13 are opened, as long as the wax cleaning work of the oil pipe 210 can be completed, which is not limited herein. That is, when the driving component 2 drives the pipeline 11 to move within the oil pipe 210, the first valve body 12 and / or several second valve bodies 13 are opened.

[0140] It can be understood that in some other embodiments, when the driving component 2 drives the pipeline 11 to move within the oil pipe 210, the first valve body 12 and several second valve bodies 13 can be all closed. The wax block is broken by the movement of the pipeline 11 within the oil pipe 210, and the wax block is melted through the pipeline 11.

[0141] The oil pipe wax cleaning device 100 and method of the embodiments of the present application can prevent the oil pipe 210 from waxing by arranging the pipeline 11 inside the oil pipe 210; by inputting fluid into the oil pipe 210 and driving the pipeline 11 to move within the oil pipe 210, the inside of the oil pipe 210 is wax cleaned, thereby ensuring the working stability of the oil production equipment and extending the service life of the oil production equipment.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other changes in different aspects of the present application as above, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for removing wax from an oil pipe, applied to an oil pipe removing wax device, characterized in that: The oil pipe wax removal device comprises a pipeline, a first valve body and a plurality of second valve bodies, wherein the first valve body is arranged at one end of the pipeline, and the plurality of second valve bodies are arranged in sequence and at intervals along the length direction of the pipeline, and the method comprises: The pipeline is placed in the oil pipe, the first valve body and the plurality of second valve bodies are closed, and fluid is input into the pipeline; If the wax cleaning of the oil pipe is not completed, the first valve body is opened to allow the fluid in the pipeline to be discharged to the oil pipe through the first valve body; If the pressure of the fluid in the pipeline reaches a first preset pressure, the plurality of second valve bodies are opened, so that the fluid in the pipeline is discharged to the oil pipe through the plurality of second valve bodies.

2. The oil pipe wax removal method according to claim 1, characterized in that: The step of inputting the fluid into the pipeline includes: heating the fluid before inputting it into the pipeline, or heating the fluid after inputting it into the pipeline; and / or, The first valve body is opened by: pressurizing the fluid in the pipeline to the opening pressure of the first valve body, and the first valve body is opened; and / or, The opening of the plurality of second valve bodies includes: when the fluid in the pipeline is pressurized to an opening pressure of a corresponding one of the second valve bodies, the corresponding one of the second valve bodies is opened.

3. The oil pipe wax removal method according to claim 1, characterized in that: After the first valve body is opened, it includes: Continuously introducing fluid into the pipeline; If the fluid pressure in the pipeline is greater than the opening pressure of the first valve body, the first valve body remains open; If the fluid pressure in the pipeline is less than the opening pressure of the first valve body, it is determined that the oil pipe wax cleaning is completed, and the first valve body is closed.

4. The oil pipe wax removal method according to claim 1, characterized in that: The opening pressures of the plurality of second valve bodies increase in sequence from an end close to the first valve body toward an end away from the first valve body; The opening pressure of the second valve body closest to the first valve body is equal to the first preset pressure, and the opening pressure of the first valve body is less than the first preset pressure.

5. The oil pipe wax removal method according to claim 4, characterized in that: The opening of the plurality of second valve bodies comprises: when the fluid in the pipeline is pressurized to an opening pressure of a corresponding second valve body, a corresponding second valve body is opened; When the fluid in the pipeline is pressurized to the opening pressure of a corresponding second valve body, the corresponding second valve body is opened, including: After the first valve body is opened, fluid is continuously input into the pipeline; If the wax cleaning of the oil pipe is not completed, so that the pressure of the fluid in the pipeline continues to increase, the plurality of second valve bodies are opened in sequence.

6. The oil pipe wax removal method according to claim 1, characterized in that: After the fluid is input into the pipeline, the method further comprises: The working current of the oil production equipment is detected, and whether the wax removal of the oil pipe is completed is determined according to the working current.

7. The oil pipe wax removal method according to claim 6, characterized in that: The step of judging whether the oil pipe wax cleaning is completed according to the working current includes: Determining whether the operating current is greater than a preset current; If the working current is less than or equal to the preset current, it is determined that the oil pipe wax cleaning is completed; If the working current is greater than the preset current, it is determined that the oil pipe wax cleaning is not completed.

8. The oil pipe wax removal method according to claim 1, characterized in that: After the plurality of second valve bodies are opened, the method further comprises: judging whether the oil pipe has been dewaxed according to the pressure of the fluid in the pipe; If the pressure of the fluid in the pipeline is less than the opening pressure of the first valve body, it is determined that the oil pipeline wax cleaning is completed, and the first valve body and the plurality of second valve bodies are all closed; If the pressure of the fluid in the pipeline is greater than or equal to the first preset pressure, it is determined that the oil pipeline wax cleaning is not completed, and the first valve body and at least one of the second valve bodies remain open.

9. The oil pipe wax removal method according to claim 1, characterized in that: The method further comprises: If the pressure of the fluid in the pipeline reaches a second preset pressure, the pipeline is driven to move toward the opening direction of the oil pipe.

10. The oil pipe wax removal method according to claim 9, characterized in that: The step of driving the pipeline to move toward the opening direction of the oil pipe comprises: The pipeline is driven to move toward the opening direction of the oil pipe, and the first valve body and the plurality of second valve bodies move along with the pipeline, and the first valve body and the plurality of second valve bodies discharge fluid into the oil pipe to flush the inner wall of the oil pipe; Wherein, the second preset pressure is greater than the opening pressure of the plurality of second valve bodies.

11. An oil pipe wax removal device, characterized in that: The oil pipe wax removal device comprises a pipeline, a first valve body and a plurality of second valve bodies, wherein the first valve body is arranged at one end of the pipeline, and the plurality of second valve bodies are arranged in sequence and spaced apart along the length direction of the pipeline. The oil pipe wax cleaning device is based on the pipeline, the first valve body and the plurality of second valve bodies, and is used to support the implementation of the oil pipe wax cleaning method according to any one of claims 1 to 10.

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