Fiber paraffin control and paraffin removal device for rodless pump well

Abstract

The invention relates to a rodless pump well fiber paraffin control and removal device which comprises an outer pipe oil pipe, and the inner side wall of the outer pipe oil pipe is evenly connected with a plurality of active paraffin precipitation device fibers and paraffin catcher ropes. A lifting cable is fixedly connected to the middle of the upper end of the paraffin removal connecting device, and the paraffin removal connecting device is movably inserted into the outer oil pipe. According to the equipment provided by the embodiment of the invention, the wax catcher cotton rope and the active wax precipitation device fiber, namely a fibrous or woolen yarn-like structure, are mounted on the inner wall of the oil pipe, namely a wax crystal or wax molecule adsorption fiber material or adsorption cotton rope, and are lowered into a well along with the oil pipe and below a wax precipitation point during oil well operation, so that when the oil well is in production, if the oil contains wax, the wax crystal or wax molecule adsorption fiber material or adsorption cotton rope is not damaged; and the wax can be easily captured and gathered by the rope of the wax catcher and the fiber of the active wax precipitation device, equivalently, the wax is removed from the oil, so that the wax is more conveniently and quickly captured and removed from the oil liquid.

Description

Technical Field

[0001] The present application relates to the technical field of oil extraction, and in particular to a fiber wax prevention and removal device for a rodless pump well. Background Art

[0002] Oil production in oil wells mainly relies on mechanical technology to pump crude oil from the oil layer to the ground. The main pumping technologies used are pumping rod pumps, screw pumps, submerged electric submersible pumps (hereinafter referred to as electric submersible pumps), hydraulic pumps, etc. Among them, screw pumps are ground-driven screw pumps and electric submersible screw pumps. In general, electric submersible screw pumps, electric submersible pumps, and hydraulic pumps are collectively referred to as rodless pumps. According to field experience, hydraulic pumps rarely have waxing problems. Electric submersible pumps are generally used in wells with relatively high liquid volumes, so the temperature of the output fluid is relatively high and waxing is less likely to occur. Electric submersible screw pumps are used in wells with relatively low liquid volumes for energy-saving considerations, so waxing occurs more frequently on site, and wax removal is also more troublesome. If wax removal is not timely, it will seriously affect production, causing the wellbore to be blocked or the pump unit to burn out due to overheating.

[0003] At present, there are several ways to clean the wax of electric submersible screw pumps on site: one is to clean the wax with wax scrapers. This wax cleaning method requires the cooperation of a wax cleaning vehicle, which uses the power of the wax cleaning vehicle to lower and lift the wax scrapers for wax cleaning. This requires a lot of manpower, and generally requires the cooperation of more than 3 people to complete. There are certain unsafe factors and the cost is relatively high; the second is the hot washing wax cleaning method, which mainly adopts the process of hot washing wax cleaning vehicles. By heating water or heating the output fluid in the wellbore, a high-temperature hot washing wax cleaning liquid is formed. The wax cleaning liquid is pumped into the well from the annulus of the oil casing to heat the oil pipe, dissolve the wax on the inner wall of the oil pipe, and is brought out to the ground system by the output fluid and the pumped wax cleaning liquid, thereby completing the wax cleaning work. Due to the high temperature (even high-temperature steam may be used), this wax cleaning method is also dangerous and costly. Higher; the third is the cable electric wax cleaning method, which is mainly to add a motor to the wax cleaning device with a wax scraper, and drive the wax cleaning device up and down and clean the wax through the motor, which requires a cable to power the wax cleaning device; based on the above understanding and on-site conditions, it can be seen that the wax deposition in oil wells is still relatively serious. From the current wax cleaning methods, the more technically advanced wax cleaning method is still the cable electric wax cleaning method, but because it needs to be powered by a cable, the recovery and lowering of the cable is a problem, mainly to solve the synchronization of the up and down movement of the wax cleaning device with the recovery of the cable and wire rope, which is very difficult, and it is easy to cause the cable and wire rope to be entangled, which is easy to cause cable wear and leakage. In addition, the entanglement of the wire rope may also cause the well pump inspection operation, so we proposed a rodless pump well fiber anti-wax cleaning device. Summary of the invention

[0004] The present application provides a rodless pump well fiber wax prevention and removal device to solve the problems raised in the background technology.

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a rodless pump well fiber wax prevention and wax removal device, comprising:

[0006] An outer oil pipe, wherein the inner side wall of the outer oil pipe is evenly connected with a plurality of active wax binder fibers and wax catcher ropes;

[0007] A wax cleaning connection device, wherein a lifting cable is fixedly connected to the middle of the upper end of the wax cleaning connection device, and the wax cleaning connection device is movably inserted into the interior of the outer tube oil pipe.

[0008] Optionally, the wax cleaning connection device includes a cable connecting block, an extrusion type wax cleaner and a weight block, the outer side of the cable connecting block is fixedly connected to a plurality of connecting rods in a circular array, the outer side of the connecting rod is fixedly connected to the extrusion type wax cleaner, and the lower end of the cable connecting block is fixedly connected to the weight block.

[0009] Optionally, the middle part of the upper end of the cable connecting block is fixedly connected to the lifting cable.

[0010] Optionally, the extrusion type wax remover is in a ring shape.

[0011] Optionally, the length of the wax catcher line is greater than the length of the active wax binder fiber.

[0012] Optionally, the outer diameter of the extrusion wax remover is larger than the overall inner diameter of the active wax collector fiber composition.

[0013] Optionally, the active wax binder fiber 4 and the wax catcher cord 6 have excellent flexibility and tensile strength and strong wear resistance.

[0014] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0015] The device provided in the embodiment of the present application uses a wax catcher rope and an active wax binder fiber, that is, a fiber-shaped or wool-like shape installed on the inner wall of the oil pipe, that is, a wax crystal or wax molecule adsorbing fiber material or an adsorbing rope. When the oil well is operating, it is lowered into the well with the oil pipe and lowered above the wax binding point. In this way, when the oil well is in production, if the oil contains wax, it is easily captured and gathered by the wax catcher rope and the active wax binder fiber, which is equivalent to removing it from the oil. Afterwards, when wax crystals precipitate in the cylinder, the anti-wax binder fiber and the active wax binder rope will capture the precipitated wax crystals, and then the wax will be squeezed off the surface of the anti-wax binder fiber and the active wax binder rope through the squeezing effect of the squeezing wax cleaner when it goes up, and be carried away by the oil flow in the production process, and finally to the wellhead surface, making it more convenient and faster to capture and remove wax in the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 A cross-sectional view of a fiber wax prevention and wax removal device for a rodless pump well;

[0019] Figure 2 A fiber wax prevention and wax removal device for rodless pump wells Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a structural diagram of a wax cleaning connection device for a rodless pump well fiber wax prevention and cleaning device.

[0021] In the figure: 1. lifting cable; 2. outer tube oil pipe; 3. wax cleaning connection device; 4. active wax collector fiber; 5. extrusion wax cleaner; 6. wax catcher rope; 7. weight block. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0023] Various embodiments of the present application may exist in the form of a range. It should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a hard limit to the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in the present application, it is meant to include any quoted numbers (fractions or integers) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application, etc., can be purchased from the market or can be prepared by existing methods.

[0024] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the present application, the terms "include", "comprise", etc. refer to "including but not limited to". In the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In the present application, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular items or plural items. For example, "at least one of a, b, or c" or "at least one of a, b and c" can both mean: a, b, c, ab, i.e. a and b, ac, bc or abc, where a, b, c can be single or plural, respectively.

[0025] like Figure 1-3 As shown, the embodiment of the present application provides a rodless pump well fiber wax prevention and removal device, comprising:

[0026] An outer oil pipe 2, wherein a plurality of active wax binder fibers 4 and wax catcher cords 6 are evenly connected to the inner side wall of the outer oil pipe 2;

[0027] A wax cleaning connection device 3 , wherein a lifting cable 1 is fixedly connected to the middle portion of the upper end of the wax cleaning connection device 3 , and the wax cleaning connection device 3 is movably inserted into the interior of the outer oil pipe 2 .

[0028] Specifically, the active wax collector fiber 4 has excellent flexibility and tensile strength, strong wear resistance and certain elasticity, which can ensure that it can be restored to its original state after being squeezed and tilted by the wax remover;

[0029] The function of the wax collector rope 6 is the same as that of the active wax collector fiber 4. The main purpose of designing the wax collector rope 6 is to better capture wax crystals in crude oil during the production process. The wax collector rope 6 is also required to have excellent flexibility and tensile strength and strong wear resistance. In addition, its length is slightly longer than the active wax collector fiber 4 and the number is smaller.

[0030] like Figure 1 and Figure 3 As shown: the wax cleaning connection device 3 includes a cable connection block, an extrusion type wax cleaner 5 and a weight block 7, the outer side of the cable connection block is fixedly connected to a plurality of connecting rods in a circular array, and the outer side of the connecting rod is fixedly connected to the extrusion type wax cleaner 5, and the lower end of the cable connection block is fixedly connected to the weight block 7.

[0031] Specifically, since the wax cleaning device moves downward by free fall, that is, it moves downward without power, a certain weight is required to ensure the downward movement of the device. Therefore, when the lifting cable moves downward and the wax cleaning device is ready to be lowered to the wax cleaning position, the weight of the weight block 7 is used to drive the entire wax cleaning device downward. In addition, the weight block 7 also has the function of straightening, so that the entire device is basically located at the center of the outer oil pipe 2.

[0032] like Figure 1 As shown: the middle part of the upper end of the cable connecting block is fixedly connected to the lifting cable 1.

[0033] Specifically, the lifting cable 1 is displaced upwards in order to pull the wax cleaning connecting device 3 .

[0034] like Figure 3 As shown: the extrusion wax cleaner 5 is in a ring shape.

[0035] like Figure 1 As shown: the length of the wax catcher rope 6 is greater than the length of the active wax binder fiber 4.

[0036] Specifically, the setting of the length of the wax catcher rope 6 and the active wax binder fiber 4 can increase the efficiency of the wax catcher rope 6 and the active wax binder fiber 4 in capturing wax crystals in crude oil.

[0037] like Figure 1 As shown: the outer diameter of the extrusion wax remover 5 is larger than the overall inner diameter of the active wax binder fiber 4.

[0038] Specifically, the extrusion wax cleaner 5 can move up and down unhindered inside the outer oil pipe 2 of the whole wax cleaning device, and the extrusion wax cleaner 5 can be always in a horizontal wax scraping state under the left and right sides of the weight block 7.

[0039] like Figure 1 and Figure 2 As shown: the active wax binder fiber 4 and the wax catcher cord 6 have excellent flexibility and tensile strength and strong wear resistance.

[0040] Specifically, the active wax collector fiber 4 and the wax catcher rope 6 have the same function, which is to capture wax crystals in crude oil.

[0041] When the equipment is in use, the external equipment pulls the lifting cable 1 upward, which will drive the wax cleaning connection device 3 and the extrusion wax cleaner 5 to move upward, and scrape off the wax attached to the active wax collector fiber 4 and the wax catcher rope 6 on the inner wall of the outer oil pipe 2. During the wax cleaning process, there is a soft contact type between the extrusion wax cleaner 5 and the active wax collector fiber 4 (also called wax catcher fiber) and the wax catcher rope 6 (or called wax catcher rope).

[0042] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features applied for by the present application.

Claims

1. A rodless pump well fiber wax prevention and removal device, characterized in that: include: An outer oil pipe (2), wherein a plurality of active wax binder fibers (4) and wax catcher ropes (6) are evenly connected to the inner side wall of the outer oil pipe (2); A wax cleaning connection device (3), wherein a lifting cable (1) is fixedly connected to the middle of the upper end of the wax cleaning connection device (3), and the wax cleaning connection device (3) is movably inserted into the interior of the outer oil pipe (2).

2. The rodless pump well fiber wax prevention and removal device according to claim 1 is characterized in that: The wax removal connection device (3) comprises a cable connection block, an extrusion wax remover (5) and a weight block (7); a plurality of connecting rods are fixedly connected to the outer side of the cable connection block in a ring array, and the extrusion wax remover (5) is fixedly connected to the outer side of the connecting rod; and the weight block (7) is fixedly connected to the lower end of the cable connection block.

3. The rodless pump well fiber wax prevention and removal device according to claim 2 is characterized in that: The middle part of the upper end of the cable connection block is fixedly connected to the lifting cable (1).

4. The rodless pump well fiber wax prevention and removal device according to claim 2 is characterized in that: The extrusion type wax remover (5) is in the shape of a circular ring.

5. The rodless pump well fiber wax prevention and removal device according to claim 1 is characterized in that: The length of the wax catcher cord (6) is greater than the length of the active wax binder fiber (4).

6. The rodless pump well fiber wax prevention and removal device according to claim 4 is characterized in that: The outer diameter of the extrusion wax remover (5) is greater than the overall inner diameter of the active wax binder fiber (4).

7. The rodless pump well fiber wax prevention and removal device according to claim 1 is characterized in that: The active wax binder fiber (4) and the wax catcher cord (6) have excellent flexibility and tensile strength and have strong wear resistance.

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