Oil well casing dosing device capable of dropping liquid at constant speed

Abstract

The oil well casing dosing device comprises a bottom plate, an oil pipe is installed on the left side of the upper surface of the bottom plate, a medicine storage tank is placed on the right side of the upper surface of the bottom plate, and a peristaltic pump is installed on the portion, between the oil pipe and the medicine storage tank, of the upper surface of the bottom plate; the two ends of the peristaltic pump are communicated with the right end of the oil pipe and the discharging pipe on the medicine storage tank through liquid conveying pipes respectively, and the left end and the right end of the interior of each liquid conveying pipe are provided with an adjusting valve and a needle valve respectively. According to the oil well casing dosing device capable of dripping the liquid at the constant speed, chemicals in the chemical storage tank are conveyed into an oil pipe through the liquid conveying pipe through the peristaltic pump and directly flow into an oil well, the paraffin removal effect is achieved, the chemicals can be slowly dripped into an oil sleeve annulus through the arranged peristaltic pump, the process is simple, operation is convenient, meanwhile, the chemicals are not splashed outwards, and harm to the human body is avoided; and the paraffin removal effect is good by slowly dripping the medicament, and the oil well pump inspection period is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of oil well casing chemical dosing technology, specifically an oil well casing chemical dosing device that can drip at a uniform rate. Background Technology

[0002] A well casing chemical dosing device is a specialized device installed in the well casing (a tubular device in an oil well used to support the wellbore and isolate formation fluids) system. It continuously or periodically delivers chemical agents into the well by precisely controlling the injection volume. Its core function is to improve the production conditions of the oil well, maintain the stability of the wellbore and formation, extend the life of the oil well, and increase the recovery rate through the action of the chemical agents.

[0003] In response to the severe wax buildup and frequent malfunctions in the downhole tubing and surface pipelines of Shuro oil wells, traditional manual chemical dosing methods have significant drawbacks. The previous practice of directly pouring chemicals into the well casing using plastic containers was not only time-consuming and labor-intensive, severely impacting operational efficiency, but also posed significant safety hazards. Accidental drips of chemicals onto the operator's body could cause burns, chemical corrosion, and other injuries. Furthermore, the low precision of manual operation and uneven chemical distribution made it difficult to effectively address the wax buildup problem. Therefore, we proposed a well casing chemical dosing device that can deliver chemicals at a uniform drip rate, effectively solving these problems. Utility Model Content

[0004] The purpose of this invention is to provide a uniformly dripping chemical dosing device for oil well casing, in order to solve the problems mentioned in the background art, such as the previous operation of directly pouring chemicals into the oil well casing from a plastic container, which is not only time-consuming and labor-intensive, seriously affecting the efficiency of operation, but also poses great safety hazards; if the chemicals are accidentally dripped onto the operator's body, they can cause skin burns, chemical corrosion and other injuries, and the low precision of manual operation and uneven distribution of chemicals make it difficult to effectively improve the waxing problem.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a uniformly dripping oil well casing chemical dosing device, comprising a base plate, an oil pipe installed on the left side of the upper surface of the base plate, and a chemical storage tank placed on the right side of the upper surface of the base plate, and a peristaltic pump installed on the upper surface of the base plate between the oil pipe and the chemical storage tank; further comprising: both ends of the peristaltic pump are connected to the right end of the oil pipe and the discharge pipe on the chemical storage tank respectively through a delivery pipe, and the left and right ends of the delivery pipe are respectively equipped with a regulating valve and a needle valve, a motor is bolted to the bottom of the chemical storage tank, a stirring rod is provided inside the chemical storage tank, a transmission rod is connected to the upper surface of the base plate by a bearing, and a fitting block is fixed to the outside of the transmission rod, and a bracket is fixedly connected to the outside of the delivery pipe, and a striking block is connected through the inside of the bracket.

[0006] Preferably, the bottom of the stirring rod penetrates the interior of the medicine storage tank, and the stirring rod and the medicine storage tank are connected by a bearing. The bottom of the stirring rod is fixedly connected to the output end of the motor, and the stirring rod and the transmission rod are connected by a pulley assembly.

[0007] Preferably, the striking block and the bracket are slidably connected, and the ends of the striking block and the fitting block are fitted together. A first spring is installed between the outer side of the striking block and the inner wall of the bracket.

[0008] Preferably, the infusion tube is connected to the discharge tube and oil tube on the medicine storage tank by a flange and multiple bolts, and a sealing gasket is embedded in the side of the flange.

[0009] Preferably, a filter screen is provided on the right side inside the infusion tube, and mounting blocks are fixed at the top and bottom of the filter screen. A limiting groove is provided on the outer side of the mounting block, and the upper and lower ends of the right side inside the infusion tube are connected through the limiting blocks.

[0010] Preferably, a second spring is installed between the outer side of the limiting block and the inner wall of the infusion tube.

[0011] Preferably, the filter screen is slidably engaged with the inside of the flange by two mounting blocks, the limiting block is slidably disposed inside the infusion tube, and the limiting block and the limiting groove are connected by insertion.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the oil well casing chemical dosing device that can drip at a uniform rate adopts a novel structural design, the specific details of which are as follows:

[0013] (1) The agent in the storage tank is transported to the inside of the tubing through the infusion pipe by the peristaltic pump and flows directly into the oil well to achieve the wax removal effect. The peristaltic pump can slowly drip the agent into the annulus of the casing. The process is simple and easy to operate. At the same time, the agent does not splash and is harmless to the human body. The slow dripping of the agent has a better wax removal effect and extends the pump inspection cycle of the oil well.

[0014] (2) The infusion pipe and the oil pipe are connected together by flanges and bolts, and the sealing gaskets set between the flanges form a static sealing structure, which can withstand high pressure and prevent the leakage of the agent. At the same time, it can resist the mechanical vibration of the oil well site. Furthermore, the filter screen can intercept particulate impurities in the agent to prevent clogging of the peristaltic pump. Afterwards, the two limit blocks can be pulled outwards to separate them from the limit groove, which can release the limit on the filter screen. Then the filter screen can be pulled out of the infusion pipe and removed, which makes it easy to remove the filter screen for replacement or cleaning, thereby improving the subsequent filtration effect.

[0015] (3) The motor drives the stirring rod to rotate, which can stir the medicine inside the storage tank, so that the medicine or mixed liquid is kept in a uniform state, avoiding the problems of layering, precipitation or uneven concentration caused by standing, thereby ensuring the accuracy of dosing and the effect of the medicine.

[0016] (4) The stirring rod drives the transmission rod to rotate synchronously through the pulley assembly, so that the transmission rod drives the bonding block to rotate and squeeze the striking block, causing the striking block to move and strike the outside of the infusion tube. When the bonding block stops squeezing the striking block, the striking block resets under the elastic force of the first spring and repeats the above operation. Therefore, the striking block strikes the outside of the infusion tube repeatedly, causing the infusion tube to vibrate, thereby preventing the drug from crystallizing and depositing and causing blockage of the infusion tube. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the connection structure between the stirring rod and the medicine storage tank of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the bonding block and the striking block of this utility model;

[0020] Figure 4 This is a schematic diagram of the separation structure of the filter screen and the infusion tube of this utility model;

[0021] Figure 5 This is a partial main cross-sectional view of the infusion tube of this utility model;

[0022] Figure 6 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0023] Figure 7 This utility model Figure 5 Enlarged structural diagram at point B.

[0024] In the diagram: 1. Base plate; 2. Oil pipe; 3. Medicine storage tank; 4. Peristaltic pump; 5. Needle valve; 6. Infusion pipe; 7. Cover plate; 8. Regulating valve; 9. Stirring rod; 10. Transmission rod; 11. Bracket; 12. Adhesive block; 13. Impact block; 14. Sealing gasket; 15. Filter screen; 16. Flange; 17. Mounting block; 18. Limiting block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-7 The present invention provides the following technical solution: a chemical dosing device for oil well casing that can drip liquid at a uniform rate;

[0027] Example 1: To address the problems of existing techniques that involve directly pouring chemicals into the well casing from plastic containers, which is time-consuming, labor-intensive, and inefficient, poses significant safety hazards; accidental spills can cause burns and chemical corrosion to operators; and the low precision of manual operation leads to uneven chemical distribution, making it difficult to effectively improve wax deposition issues, the following solution is disclosed. Please refer to the details. Figure 1 As shown, it includes a base plate 1, an oil pipe 2 is installed on the left side of the upper surface of the base plate 1, and a medicine storage tank 3 is placed on the right side of the upper surface of the base plate 1. A peristaltic pump 4 is installed on the upper surface of the base plate 1 between the oil pipe 2 and the medicine storage tank 3. It also includes: the two ends of the peristaltic pump 4 are connected to the right end of the oil pipe 2 and the discharge pipe on the medicine storage tank 3 respectively through an infusion pipe 6, and the left and right ends of the infusion pipe 6 are respectively equipped with a regulating valve 8 and a needle valve 5.

[0028] In use, the operator opens the cover plate 7 on the storage tank 3 and pours the agent into the storage tank 3. The infusion pipe 6 is then connected to the peristaltic pump 4, the storage tank 3, and the oil pipe 2 via multiple flanges 16 and multiple bolts. The agent in the storage tank 3 can then be transported to the oil pipe 2 through the infusion pipe 6 via the peristaltic pump 4 and flows directly into the oil well to achieve the dewaxing effect. The peristaltic pump 4 can also slowly drip the agent into the annulus of the casing. The process is simple and easy to operate. At the same time, the agent does not splash and is harmless to the human body. The slow dripping of the agent has a good dewaxing effect and extends the pump inspection cycle of the oil well. The agent injection flow rate can be adjusted in real time according to the wellhead back pressure through the regulating valve 8 to ensure the agent concentration is stable. At the same time, the needle valve 5 can completely cut off the fluid when needed, which is convenient for instrument maintenance.

[0029] Example 2: Unlike Example 1, this example uses the striking block 13 to repeatedly strike the outside of the infusion tube 6, causing the infusion tube 6 to vibrate. This prevents the drug from crystallizing and depositing, thus avoiding blockage of the infusion tube 6. See details... Figures 1-3 and Figure 6As shown, a motor is bolted to the bottom of the medicine storage tank 3. A stirring rod 9 is installed inside the medicine storage tank 3. A transmission rod 10 is connected to the upper surface of the bottom plate 1 by a bearing. A fitting block 12 is fixed to the outer side of the transmission rod 10. A bracket 11 is fixed to the outer side of the infusion tube 6. A striking block 13 is connected through the inside of the bracket 11. The striking block 13 and the bracket 11 are slidably connected. The end of the striking block 13 is fitted with the fitting block 12. A first spring is installed between the outer side of the striking block 13 and the inner wall of the bracket 11. The bottom of the stirring rod 9 penetrates the inside of the medicine storage tank 3. The stirring rod 9 and the medicine storage tank 3 are connected by a bearing. The bottom of the stirring rod 9 is fixedly connected to the output end of the motor. The stirring rod 9 and the transmission rod 10 are connected by a pulley assembly.

[0030] The stirring rod 9, driven by a motor, rotates to agitate the medicine inside the storage tank 3, ensuring a uniform state of the medicine or mixed liquid. This prevents stratification, sedimentation, or uneven concentration caused by standing, thus ensuring the accuracy of dosing and the effectiveness of the medicine. Simultaneously, the stirring rod 9 drives the transmission rod 10 to rotate synchronously via a pulley assembly. This causes the transmission rod 10 to rotate the bonding block 12 and press against the striking block 13, causing the striking block 13 to move and strike the outside of the infusion tube 6. When the bonding block 12 stops pressing against the striking block 13, the striking block 13 returns to its original position under the elastic force of the first spring. This process repeats, causing the striking block 13 to repeatedly strike the outside of the infusion tube 6, resulting in vibration of the infusion tube 6. This prevents the medicine from crystallizing and depositing, thus avoiding blockage of the infusion tube 6.

[0031] Example 3: Unlike Example 2, this example uses a filter screen 15 to intercept particulate impurities in the medicine, preventing blockage of the peristaltic pump 4. See details... Figure 4 , Figure 5 and Figure 7 As shown, the infusion pipe 6 is connected to the discharge pipe and oil pipe 2 on the medicine storage tank 3 by a flange 16 and multiple bolts. A sealing gasket 14 is embedded in the side of the flange 16. A filter screen 15 is provided on the right side inside the infusion pipe 6. Mounting blocks 17 are fixed to the top and bottom of the filter screen 15. A limiting groove is opened on the outside of the mounting block 17. Limiting blocks 18 are connected through the upper and lower ends of the right side inside the infusion pipe 6. A second spring is installed between the outside of the limiting block 18 and the inner wall of the infusion pipe 6. The filter screen 15 is slidably engaged with the flange 16 by the two mounting blocks 17. The limiting block 18 is slidably disposed inside the infusion pipe 6, and the limiting block 18 and the limiting groove are connected by insertion.

[0032] The infusion pipe 6 and the oil pipe 2 are connected together by flange 16 and bolts, and a static seal structure is formed by the sealing gasket 14 set between the flanges 16. This structure can withstand high pressure and prevent leakage of the agent. It can also resist mechanical vibration at the oil well site. The filter screen 15 can intercept particulate impurities in the agent and prevent clogging of the peristaltic pump 4. The filter screen 15 can be released by pulling outwards the two limit blocks 18 to separate it from the limit groove. Then the filter screen 15 can be pulled out of the infusion pipe 6 and removed, which makes it easy to remove, replace or clean the filter screen 15 and improve the subsequent filtration effect.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A uniformly dripping oil well casing chemical dosing device, comprising a base plate (1), wherein an oil pipe (2) is installed on the left side of the upper surface of the base plate (1), and a chemical storage tank (3) is placed on the right side of the upper surface of the base plate (1), and a peristaltic pump (4) is installed on the upper surface of the base plate (1) between the oil pipe (2) and the chemical storage tank (3); characterized in that, Also includes: The two ends of the peristaltic pump (4) are connected to the right end of the oil pipe (2) and the discharge pipe on the medicine storage tank (3) through the infusion pipe (6). The left and right ends of the infusion pipe (6) are respectively equipped with regulating valve (8) and needle valve (5). The bottom of the medicine storage tank (3) is bolted with a motor. The inside of the medicine storage tank (3) is equipped with a stirring rod (9). The upper surface of the bottom plate (1) is connected to a transmission rod (10) by a bearing. The outer side of the transmission rod (10) is fixed with a bonding block (12). The outer side of the infusion pipe (6) is fixedly connected with a bracket (11). The inside of the bracket (11) is connected with a striking block (13).

2. The oil well casing chemical dosing device capable of uniform dripping according to claim 1, characterized in that: The bottom of the stirring rod (9) penetrates the interior of the medicine storage tank (3), and the stirring rod (9) and the medicine storage tank (3) are connected by a bearing. The bottom of the stirring rod (9) is fixedly connected to the output end of the motor. The stirring rod (9) and the transmission rod (10) are connected by a belt pulley assembly.

3. The oil well casing chemical dosing device capable of uniform dripping according to claim 1, characterized in that: The striking block (13) is slidably connected to the bracket (11), and the end of the striking block (13) is attached to the fitting block (12). A first spring is installed between the outer side of the striking block (13) and the inner wall of the bracket (11).

4. The oil well casing chemical dosing device capable of uniform dripping according to claim 1, characterized in that: The infusion pipe (6) is connected to the discharge pipe and oil pipe (2) on the medicine storage tank (3) by a flange (16) and multiple bolts, and a sealing gasket (14) is embedded in the side of the flange (16).

5. The oil well casing chemical dosing device capable of uniform dripping according to claim 1, characterized in that: A filter screen (15) is provided on the right side inside the infusion tube (6), and mounting blocks (17) are fixed at the top and bottom of the filter screen (15). A limiting groove is opened on the outside of the mounting block (17), and the upper and lower ends of the right side inside the infusion tube (6) are connected through the limiting block (18).

6. The oil well casing chemical dosing device capable of uniform dripping according to claim 5, characterized in that: A second spring is installed between the outer side of the limiting block (18) and the inner wall of the infusion tube (6).

7. The oil well casing chemical dosing device capable of uniform dripping according to claim 5, characterized in that: The filter screen (15) is slidably engaged with the inside of the flange (16) by two mounting blocks (17), and the limiting block (18) is slidably disposed inside the infusion tube (6), and the limiting block (18) and the limiting groove are connected by insertion.

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