Oil well paraffin removal tool

Abstract

The utility model provides an oil well paraffin removal tool, and belongs to the technical field of cleaning. Comprising a shell, a paraffin removal assembly is installed on the shell, the paraffin removal assembly is used for removing paraffin attached to the inner wall of an oil well, the paraffin removal assembly comprises a first rotating rod, the first rotating rod is rotationally arranged on the inner wall of the shell, a plurality of blades are fixedly arranged on the outer side wall of the first rotating rod, and a high-temperature hot melting head is fixedly arranged on the outer side wall of the first rotating rod; a motor is fixedly arranged on the side, away from the blade, of the shell. The output end of the motor is fixed to the first rotating rod. Through the arrangement of the wax removal assembly, after thick wax is broken through cutting of the blade, waste heat of the high-temperature hot melting head can further soften broken wax, and the situation that the broken wax is attached again due to cooling and solidification is avoided; a scraping plate of the paraffin scraping assembly is tightly attached to the well wall through reciprocating motion, thin-layer paraffin left after cutting of a blade can be removed, the paraffin removal rate is increased through the collaborative process of cutting, hot melting and scraping, and repeated paraffin removal operation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cleaning, particularly relates to an oil well wax removal tool. BACKGROUND

[0002] In the oilfield exploitation process, the wax body attached to the inner wall of the oil well is a long-standing technical problem, the wax component contained in the crude oil will gradually precipitate due to factors such as temperature drop and pressure change during the exploitation and transportation process, and form a wax layer on the inner wall of the oil well, with the extension of the exploitation time, the wax layer is continuously thickened, not only will reduce the flow section of the oil well, increase the flow resistance of the crude oil, lead to the decline of the exploitation efficiency, but also may cause the shutdown risk due to the wax layer blocking the oil pipe.

[0003] The traditional wax removal method has the following problems: when a simple mechanical cutting tool is used to face thick layer hard wax, the blade is easily worn out too fast due to the high hardness of the wax body, and the broken wax produced by cutting is easy to splash and reattach to the well wall; the simple hot melting wax removal has high energy consumption, low cleaning efficiency for thin layer residual wax body, and is difficult to completely remove; and the step-by-step wax removal equipment needs multiple driving devices, which has complex structure and poor coordination, and is easy to have cleaning dead angle during operation, therefore, the oil well wax removal tool is provided to meet the needs. UTILITARIAN CONTENT

[0004] The technical problem to be solved by the utility model is to provide an oil well wax removal tool to solve the technical problem that when a simple mechanical cutting tool is used to face thick layer hard wax, the blade is easily worn out too fast due to the high hardness of the wax body, and the broken wax produced by cutting is easy to splash and reattach to the well wall.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] An oil well wax removal tool, comprising a shell, a wax removal assembly is installed on the shell, and the wax removal assembly is used for cleaning the wax body attached to the inner wall of the oil well;

[0007] The wax removal assembly comprises a first rotating rod, the first rotating rod is rotationally arranged on the inner wall of the shell, a plurality of blades are fixedly arranged on the outer side wall of the first rotating rod, a high-temperature hot melting head is fixedly arranged on the outer side wall of the first rotating rod, a motor is fixedly arranged on the side of the shell away from the blades, and the output end of the motor is fixed with the first rotating rod.

[0008] Preferably, a wax scraping assembly is further arranged on the shell, and the wax scraping assembly is used for secondary scraping of residual wax on the inner wall of the oil well after the blade preliminarily cleans the wax on the inner wall of the oil well, and the wax scraping assembly comprises a support plate fixedly arranged on the outer side wall of the shell, a driving bevel gear fixedly arranged on the outer side wall of the first rotating rod, a plurality of second rotating rods rotatably arranged on the support plate, a driven bevel gear fixedly arranged on one end of the second rotating rod close to the driving bevel gear, the driving bevel gear and the driven bevel gear are in meshing connection, a rotating disc fixedly arranged on the other end of the second rotating rod away from the driven bevel gear, a connecting rod rotatably arranged on the rotating disc, a sliding groove formed in the support plate, a sliding block slidably arranged on the inner wall of the sliding groove, the connecting rod and the sliding block are in rotational connection, a support rod fixedly arranged on one side of the sliding block away from the rotating disc, and a scraper fixedly arranged on the other side of the support rod away from the sliding block.

[0009] Preferably, a protective shell is fixedly arranged on the outer side wall of the shell, and the protective shell completely covers the connecting rod and the sliding block, so that the connecting rod and the sliding block are isolated from external collision, friction and impurity erosion in the working state.

[0010] Preferably, one side of the scraper away from the support rod is arranged in an inclined surface.

[0011] Preferably, a support rib is fixedly arranged on the support rod, and the support rib is arranged in a triangular shape.

[0012] Preferably, a connecting seat is fixedly arranged on the outer side wall of the shell, and the connecting seat is used for connecting the shell with external equipment of the oil well.

[0013] Compared with the prior art, the utility model has at least the following beneficial effects:

[0014] In the scheme, after the thick wax is broken by the blade cutting, the residual heat of the high-temperature hot melting head can further soften the broken wax, so that the broken wax is prevented from being reattached due to cooling and solidification; the scraper of the wax scraping assembly is tightly attached to the well wall through reciprocating motion, and the thin layer of wax remaining after the blade cutting can be removed; the cooperative process of cutting, hot melting and scraping improves the wax removal rate and reduces repeated wax removal operation;

[0015] When the high-temperature hot melting head softens the wax, the hard and brittle wax can be prevented from splashing; the scraper is designed in an inclined surface, and the reciprocating motion forms a gradual scraping, so that the rigid impact on the well wall is reduced; the cooperation of the two reduces the risk of secondary attachment of wax chips and the probability of well wall damage, and ensures the integrity of the inner wall of the oil well. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings constituting part of this specification show embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable a person skilled in the relevant art to implement and use the present disclosure.

[0017] Figure 1The whole structure schematic view of the utility model;

[0018] Figure 2 The another view schematic view of the utility model;

[0019] Figure 3 The another view schematic view of the utility model; Figure 2 The enlarged view of A in the middle;

[0020] Figure 4 The first rotating rod, scraper and connecting rod schematic view of the utility model.

[0021] Reference signs

[0022] 1, shell;2, wax removal assembly;201, first rotating rod;202, blade;203, high-temperature hot melting head;204, motor;3, wax scraping assembly;301, support plate;302, driving bevel gear;303, second rotating rod;304, driven bevel gear;305, rotating disc;306, connecting rod;307, sliding groove;308, sliding block;309, support rod;310, scraper;4, protective shell;5, support rib;6, connecting seat.

[0023] As shown in the drawings, in order to clearly realize the structure of the embodiment of the utility model, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the utility model in the specific structure, device and environment, and the ordinary skilled in the art can adjust or modify these devices and environment according to specific needs, and the adjustment or modification still includes in the scope of the appended claims. DETAILED DESCRIPTION

[0024] The oil well wax removal tool provided by the utility model will be described in detail below in combination with the drawings and specific embodiments. It should be noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be used by the skilled in the art to implement some known technologies, and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the utility model.

[0025] As shown in the drawings, Figures 1-4 The embodiment of the utility model provides an oil well wax removal tool, which comprises a shell 1, a connecting seat 6 is fixedly arranged on the outer side wall of the shell 1, the connecting seat 6 is used for connecting the shell 1 with external equipment of an oil well, the tool can be fixed with external lifting equipment or conveying device through the connecting seat 6, so that the tool can stably move along the axial direction of the oil well during operation, and the wax removal precision is not affected by shaking.

[0026] In order to realize the preliminary cleaning of the wax body, the wax cleaning assembly 2 is installed on the shell 1, which quickly breaks the thick layer of wax body by combining hot melting and cutting. The driving of the wax cleaning assembly 2 is the motor 204, which is fixedly arranged on the side of the shell 1 away from the subsequent cutter 202, and the output end is fixedly connected with the first rotating rod 201. When the motor 204 is started, the first rotating rod 201 can be directly driven to rotate in the inner wall of the shell 1, thereby providing a power source for the wax cleaning operation.

[0027] A plurality of cutters 202 are fixedly arranged on the outer side wall of the first rotating rod 201, and the cutters 202 are uniformly distributed along the axial direction of the rotating rod, and the cutting edges are directed to the inner wall of the oil well. At the same time, the outer side wall of the first rotating rod 201 is also fixedly provided with a high-temperature hot melting head 203, and the high-temperature hot melting head 203 is embedded with a metal armored electric heating tube with a model of 10mmx50mm explosion-proof type. The electric heating tube is connected with a power supply module in the shell 1 through oil-resistant insulated wires, and the power supply module can be selected as a 12V explosion-proof lithium battery pack or an external special power supply cable for the well. After being powered on, the nickel-chromium alloy wire heating body in the electric heating tube converts electric energy into heat energy, so that the surface temperature of the hot melting head is stably kept at 80-120℃ (adapted to the melting point of crude oil wax body, conventional temperature control range). During operation, the high-temperature hot melting head 203 first softens the thick layer of wax body on the inner wall of the oil well by preheating, thereby reducing the hardness of the wax body (to avoid the hard and brittle wax body from splashing and causing secondary adhesion), and then the cutter 202 rotating at high speed cuts and breaks the softened wax body, so that the thick layer of wax body is broken into small pieces, which is convenient for subsequent cleaning.

[0028] After the wax cleaning assembly 2 completes the preliminary cleaning, the wax scraping assembly 3 installed on the shell 1 will perform secondary processing on the residual wax body. The installation basis of the wax scraping assembly 3 is the support plate 301, which is fixedly arranged on the outer side wall of the shell 1, and the surface thereof is precisely machined to ensure the matching accuracy of the rotating parts.

[0029] The wax scraping assembly 3 includes a driving bevel gear 302 fixedly arranged on the outer side wall of the first rotating rod 201, which rotates synchronously when the first rotating rod 201 rotates. A plurality of second rotating rods 303 are rotatably arranged on the support plate 301, and a driven bevel gear 304 is fixedly arranged on one end of the second rotating rod 303 close to the driving bevel gear 302. The driving bevel gear 302 is meshingly connected with the driven bevel gear 304, and the vertical transmission of power is realized through the meshing of the bevel gears (i.e. the axial rotation of the first rotating rod 201 is converted into the radial rotation of the second rotating rod 303). The driving motor 204 of the wax cleaning assembly 2 is used for linkage, which simplifies the structure and ensures the action coordination.

[0030] The second rotating rod 303 is fixedly provided with a rotating disc 305 at one end away from the driven bevel gear 304. When the rotating disc 305 rotates with the second rotating rod 303, the connecting rod 306 rotatably arranged at the edge of the rotating disc 305 will produce a push-pull action. The support plate 301 is provided with a sliding groove 307. The inner wall of the sliding groove 307 is slidably provided with a sliding block 308. The connecting rod 306 is rotatably connected with the sliding block 308. Therefore, the connecting rod 306 can drive the sliding block 308 to move back and forth along the sliding groove 307. The sliding groove 307 guides and restricts the sliding block 308, so as to ensure the stability of the movement track of the sliding block 308 and avoid deviation caused by the radial force.

[0031] The sliding block 308 is fixedly provided with a support rod 309 at one side away from the rotating disc 305. The support rod 309 serves as a force transmission component and transmits the movement of the sliding block 308 to the scraper 310. The support rod 309 is fixedly provided with a triangular support rib 5. The triangular structure can disperse the reaction force received by the scraper 310 during operation by using geometric stability, so as to avoid bending and deformation of the support rod 309 due to long-term stress and prolong the service life. The support rod 309 is fixedly provided with the scraper 310 at one side away from the sliding block 308. The scraper 310 serves as an execution component for secondary cleaning. One side of the scraper 310 away from the support rod 309 is provided with an inclined surface. The inclined surface is designed to form a gradual scraping effect when the scraper 310 contacts the inner wall of the oil well. The inclined surface first contacts the residual wax body and generates a lateral component force, gradually peeling the wax body from the inner wall. Compared with a vertical surface, the inclined surface is less likely to damage the well wall and improves the scraping efficiency.

[0032] The outer side wall of the shell 1 is fixedly provided with a protective shell 4. The protective shell 4 completely covers the connecting rod 306 and the sliding block 308. On the one hand, it avoids direct contact between the protrusions or hard impurities on the inner wall of the oil well and the connecting rod 306 and the sliding block 308, thereby preventing wear. On the other hand, it prevents wax chips and oil stains from entering the sliding groove 307 and affecting the sliding accuracy of the sliding block 308, thereby significantly reducing the equipment failure rate.

[0033] During actual operation, the external equipment drives the shell 1 to move along the oil well axis through the connecting seat 6, and the motor 204 drives the first rotating rod 201 to rotate. The wax removal assembly 2 operates first: the armored electric heating tube (prior art) in the high-temperature hot melting head 203 is powered to generate heat, softening the thick layer of wax body first, and then the blade 202 cuts and breaks the softened wax body to complete the preliminary cleaning of the thick layer of wax body. The wax scraping assembly 3 is synchronously linked. The driving bevel gear 302 drives the second rotating rod 303 to rotate through meshing transmission. The rotating motion is converted into reciprocating linear motion of the sliding block 308 through the rotating disc 305 and the connecting rod 306, so that the scraper 310 tightly contacts the well wall to reciprocally scrape and remove the thin layer of wax body left after the operation of the blade 202.

[0034] It should be noted that the metal armored electric heating tube, the oil-resistant insulated wire, the explosion-proof power supply module, and the nichrome wire heating body are all conventional and general components in the field of downhole tools, and their structures and principles have been disclosed.

[0035] The utility model covers any alternative, modification, equivalent method and scheme which are made on the essence and range of the utility model. In order to make the public have the thorough understanding of the utility model, the specific details are explained in the above preferred embodiment of the utility model, and the utility model can also be completely understood without the description of these details to the person skilled in the art.

[0036] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can also be made, and these improvements and refinements should also be regarded as the protection range of the utility model.

Claims

1. An oil well paraffin removal tool characterized by, Including shell (1), the shell (1) is installed with wax removal assembly (2), and the wax removal assembly (2) is used to clean the wax body attached to the inner wall of oil well; Wax removal assembly (2) includes first rotating rod (201), and the first rotating rod (201) is rotatably arranged on the inner wall of shell (1), and the outer side wall of first rotating rod (201) is fixedly provided with a plurality of blades (202), and the outer side wall of first rotating rod (201) is fixedly provided with high temperature hot melting head (203), and the side of shell (1) away from blade (202) is fixedly provided with motor (204), and the output end of motor (204) is fixed with first rotating rod (201).

2. The oil well paring tool of claim 1, wherein, The shell (1) is also provided with wax scraping assembly (3), which is used to scrape the residual wax on the inner wall of oil well after the preliminary cleaning of wax on the inner wall of oil well by blade (202), and the wax scraping assembly (3) includes support plate (301), which is fixedly arranged on the outer side wall of shell (1), the outer side wall of first rotating rod (201) is fixedly provided with driving bevel gear (302), a plurality of second rotating rods (303) are rotatably arranged on support plate (301), one end of second rotating rod (303) close to driving bevel gear (302) is fixedly provided with driven bevel gear (304), driving bevel gear (302) is connected with driven bevel gear (304), one end of second rotating rod (303) away from driven bevel gear (304) is fixedly provided with rotating disc (305), rotating disc (305) is rotatably provided with connecting rod (306), sliding groove (307) is formed in support plate (301), sliding block (308) is slidably arranged on the inner wall of sliding groove (307), connecting rod (306) is rotatably connected with sliding block (308), support rod (309) is fixedly arranged on the side of sliding block (308) away from rotating disc (305), and scraper (310) is fixedly arranged on the side of support rod (309) away from sliding block (308).

3. The oil well paring tool of claim 2, wherein, The outer side wall of the shell (1) is fixedly provided with protective shell (4), and the protective shell (4) forms complete coverage to connecting rod (306) and sliding block (308), so that the operation state can be isolated from external collision, friction and impurity erosion.

4. The oil well paring tool of claim 2, wherein, The side of the scraper (310) away from the support rod (309) is provided as an inclined surface.

5. The oil well paring tool of claim 2, wherein, The support rod (309) is fixedly provided with support rib (5), and the support rib (5) is triangularly arranged.

6. The oil well paring tool of claim 1, wherein, The outer side wall of the shell (1) is fixedly provided with connecting seat (6), and the connecting seat (6) is used to realize the connection between the shell (1) and the external equipment of oil well.

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