Downhole scale inhibition tool with anti-corrosion and anti-scale functions

Abstract

The utility model relates to the technical field of anti-corrosion and anti-scale underground anti-scale tools, and discloses an underground anti-scale tool with an anti-corrosion and anti-scale function, which comprises an outer sleeve, a connector is inserted in the outer sleeve, the bottom of the connector is connected with an anti-corrosion and anti-scale mechanism in a penetrating manner, and the surface of the connector is sleeved with a sealing mechanism. According to the underground anti-scaling tool with the anti-corrosion and anti-scaling functions, through the arrangement of the anti-corrosion and anti-scaling mechanism, when the tool is used, a connector and an anti-scaling pipe are inserted into an outer sleeve, the connector is positioned through limiting bolts on the two sides, then a plurality of annularly-distributed permeation openings are formed in the surface of the anti-scaling pipe, liquid enters the anti-scaling pipe, and the anti-scaling pipe is prevented from permeating the anti-scaling pipe; and the surface of the scale inhibition pipe is coated with the anti-corrosion coating, so that the anti-corrosion performance of the scale inhibition pipe is improved, and the situation that the scale inhibition pipe is soaked in an electrolyte solution such as underground water or well fluid for a long time, and the service life of the scale inhibition pipe is affected is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of downhole scale inhibitor tools with anti-corrosion and anti-scaling functions, and in particular to a downhole scale inhibitor tool with anti-corrosion and anti-scaling functions. Background Technology

[0002] In the petrochemical industry, metal corrosion is a particularly prominent problem, severely impacting the development and production of oil and gas fields. The most representative example is the corrosion of oil and casing pipes. Once casing pipes are damaged by corrosion, normal daily production is severely affected, sometimes even rendering extraction impossible. In oilfield production, tubing accounts for 60-75% of total investment. Corrosion of downhole pipes, rods, pumps, etc., shortens the operational cycle. Corrosion is the main cause of damage and scrapping of oil and casing pipes, resulting in huge economic losses for oilfield production. The raw materials for underground equipment and tubing in oil and water wells are primarily metals, immersed in electrolyte solutions such as groundwater or well fluids (which have high mineralization and ion content, classifying them as electrolyte solutions). Therefore, electrochemical corrosion of metals caused by galvanic cells on the metal surface is the main source of corrosion in oil and water wells.

[0003] Existing downhole scale inhibitors may rust on their surface when used due to prolonged immersion in electrolyte solutions such as groundwater or well fluids, severely affecting normal daily production and sometimes even making mining impossible. Therefore, a downhole scale inhibitor with anti-corrosion and anti-scale functions is proposed. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this utility model is to provide a downhole scale inhibitor tool with anti-corrosion and anti-scaling functions, so as to solve the problem mentioned in the background art that the surface of the scale inhibitor tool may rust due to prolonged immersion in electrolyte solutions such as groundwater or well fluid, which seriously affects daily normal production and sometimes even makes mining impossible.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a downhole scale inhibitor tool with anti-corrosion and anti-scaling functions, comprising an outer sleeve, a connector inserted into the inner part of the outer sleeve, an anti-corrosion and scale inhibitor mechanism connected through the bottom of the connector, a sealing mechanism fitted onto the surface of the connector, the anti-corrosion and scale inhibitor mechanism comprising a scale inhibitor tube connected through the bottom of the connector, the surface of the scale inhibitor tube being coated with an anti-corrosion coating; the sealing mechanism comprising a sealing ring fixedly fitted onto the surface of the connector, and an annular spring installed inside the sealing ring.

[0008] As a further embodiment of this utility model, the surface of the scale-inhibiting tube is provided with a plurality of permeable ports, which are arranged in a ring on the surface of the scale-inhibiting tube. The permeable ports serve to facilitate the flow of liquid.

[0009] As a further embodiment of this utility model, the upper surface of the outer sleeve is provided with a threaded hole, and the inner thread of the threaded hole is connected to an upper connector. The upper connector serves to seal the connector.

[0010] As a further embodiment of this utility model, the inner wall of the upper connector is fitted onto the surface of the sealing ring, and the inner bottom of the upper connector is inserted into the surface of the connector. The sealing ring improves the sealing performance of the connection.

[0011] As a further embodiment of this utility model, a flange connector is installed on the top of the upper connector, and the surface of the flange connector is provided with a plurality of connection holes. The flange connector serves to connect to external pipes.

[0012] As a further embodiment of this utility model, the outer sleeve has two threaded holes on its surface, and a limiting bolt is connected to the internal thread of the threaded hole. The limiting bolt is inserted into a positioning groove on the surface of the connector. The limiting bolt serves to fix the scale-inhibiting tube.

[0013] As a further embodiment of this utility model, the surface of the outer sleeve is equipped with several anti-slip blocks, and the bottom of the outer sleeve is fixedly connected with a threaded interface. The anti-slip blocks provide an anti-slip function.

[0014] (III) Beneficial Effects

[0015] This utility model provides a downhole scale inhibitor tool with anti-corrosion and anti-scaling functions, which has the following beneficial effects:

[0016] 1. This downhole scale inhibitor tool with anti-corrosion and anti-scaling functions, through the setting of the anti-corrosion and scale inhibitor mechanism, when in use, inserts the connector and scale inhibitor tube into the outer sleeve, and uses the limiting bolts on both sides to position the connector. Then, several annularly distributed permeable ports are opened on the surface of the scale inhibitor tube. Liquid enters into the scale inhibitor tube and is discharged through the permeable ports, while large particles of impurities are blocked by the permeable ports and remain inside the scale inhibitor tube. In addition, an anti-corrosion coating is applied to the surface of the scale inhibitor tube to improve its anti-corrosion performance and avoid prolonged immersion in groundwater or well fluid and other electrolyte solutions, which would affect its service life.

[0017] 2. This downhole scale inhibitor tool with anti-corrosion and anti-scaling functions, through the setting of the sealing mechanism, has a sealing ring fitted on the surface of the connector when sealing the connector, and an annular spring installed inside the sealing ring. The annular spring can improve the tightness between the sealing ring and the inner wall of the upper connector, thereby improving the sealing performance of the connector and preventing the sealing ring from aging and loosening after long-term use, which could lead to leakage at the connection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the connector structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the anti-corrosion and scale-inhibiting mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the sealing mechanism of this utility model.

[0022] In the diagram: 1. Outer sleeve; 2. Connector; 3. Anti-corrosion and scale inhibition mechanism; 301. Scale inhibition tube; 302. Anti-corrosion coating; 4. Sealing mechanism; 401. Sealing ring; 402. Ring spring; 5. Inlet; 6. Upper connector; 7. Flange connector; 8. Limit bolt; 9. Anti-slip block; 10. Lower threaded interface. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a downhole scale inhibitor tool with anti-corrosion and anti-scaling functions, including an outer tube 1, a connector 2 inserted inside the outer tube 1, and an anti-corrosion and scale inhibitor mechanism 3 connected through the bottom of the connector 2. The anti-corrosion and scale inhibitor mechanism 3 prevents prolonged immersion in electrolyte solutions such as groundwater or well fluid, thus affecting its service life. A sealing mechanism 4 is fitted onto the surface of the connector 2. The sealing mechanism 4 improves the sealing performance of the connector 2, preventing the sealing ring 401 from aging and loosening after long-term use, which could lead to leakage at the connection. The anti-corrosion and scale inhibitor mechanism 3 includes a scale inhibitor tube 301 that is connected through the bottom of the connector 2, and the surface of the scale inhibitor tube 301 is coated with an anti-corrosion coating 302. The sealing mechanism 4 includes a sealing ring 401 that is fixedly fitted onto the surface of the connector 2, and a ring spring 402 is installed inside the sealing ring 401.

[0025] The scale-inhibiting tube 301 has several permeable ports 5 on its surface. The permeable ports 5 are arranged in a ring on the surface of the scale-inhibiting tube 301. The permeable ports 5 serve to facilitate the flow of liquid.

[0026] The upper surface of the outer sleeve 1 is provided with a threaded hole, and the upper connector 6 is connected to the threaded hole. The upper connector 6 serves to seal the connector 2.

[0027] The inner wall of the upper connector 6 is fitted onto the surface of the sealing ring 401, and the inner bottom of the upper connector 6 is inserted into the surface of the connector 2. The sealing ring 401 is used to improve the sealing performance of the connection.

[0028] A flange connector 7 is installed on the top of the upper connector 6. Several connection holes are opened on the surface of the flange connector 7. The flange connector 7 serves to connect to external pipes.

[0029] The outer sleeve 1 has two threaded holes on its surface. The internal threads of the threaded holes are connected to limit bolts 8. The limit bolts 8 are inserted into the positioning grooves on the surface of the connector 2. The limit bolts 8 serve to fix the scale-inhibiting tube 301.

[0030] Several anti-slip blocks 9 are installed on the surface of the outer tube 1, and the bottom of the outer tube 1 is fixedly connected to a threaded interface 10. The anti-slip blocks 9 serve to prevent slipping.

[0031] In this invention, the working steps of the device are as follows:

[0032] First step: When using it, insert the connector 2 and the scale inhibitor tube 301 into the outer sleeve 1, and use the limiting bolts 8 on both sides to position the connector 2. Then, several annularly distributed permeable ports 5 are opened on the surface of the scale inhibitor tube 301. The liquid enters the scale inhibitor tube 301 and is discharged through the permeable ports 5, while large particles of impurities are blocked by the permeable ports 5 and remain inside the scale inhibitor tube 301. Furthermore, an anti-corrosion coating 302 is applied to the surface of the scale inhibitor tube 301 to improve its corrosion resistance.

[0033] The second step: When sealing the connector 2, a sealing ring 401 is fitted onto the surface of the connector 2, and a ring spring 402 is installed inside the sealing ring 401. The ring spring 402 can improve the tightness between the sealing ring 401 and the inner wall of the upper connector 6. It should be noted that the device structure and drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, those skilled in the art can clearly understand the specific details of its power mechanism, power supply system and control system, provided they understand the principle of the above utility model. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art.

[0034] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A downhole scale inhibitor tool with anti-corrosion and anti-scaling functions, comprising an outer casing (1), characterized in that: The inner part of the outer tube (1) is connected to a connector (2), the bottom of the connector (2) is connected to an anti-corrosion and scale-inhibiting mechanism (3), and the surface of the connector (2) is fitted with a sealing mechanism (4). The anti-corrosion and scale inhibition mechanism (3) includes a scale inhibition tube (301) that runs through and connects to the bottom of the connector (2), and the surface of the scale inhibition tube (301) is coated with an anti-corrosion coating (302). The sealing mechanism (4) includes a sealing ring (401) fixedly sleeved on the surface of the connector (2), and an annular spring (402) is installed inside the sealing ring (401).

2. The downhole scale inhibitor tool with anti-corrosion and anti-scaling functions according to claim 1, characterized in that: The scale-inhibiting tube (301) has several infiltration ports (5) on its surface, and the infiltration ports (5) are distributed in a ring on the surface of the scale-inhibiting tube (301).

3. A downhole scale inhibitor tool with anti-corrosion and anti-scaling functions according to claim 1, characterized in that: The upper surface of the outer sleeve (1) is provided with a threaded hole, and the upper connector (6) is threadedly connected inside the threaded hole.

4. A downhole scale inhibitor tool with anti-corrosion and anti-scaling functions according to claim 3, characterized in that: The inner wall of the upper connector (6) is fitted onto the surface of the sealing ring (401), and the inner bottom of the upper connector (6) is inserted into the surface of the connector (2).

5. A downhole scale inhibitor tool with anti-corrosion and anti-scaling functions according to claim 3, characterized in that: The top of the upper connector (6) is equipped with a flange connector (7), and the surface of the flange connector (7) is provided with several connection holes.

6. A downhole scale inhibitor tool with anti-corrosion and anti-scaling functions according to claim 1, characterized in that: The outer tube (1) has two threaded holes on its surface. The threaded holes are connected to a limit bolt (8) which is inserted into a positioning groove on the surface of the connector (2).

7. A downhole scale inhibitor tool with anti-corrosion and anti-scaling functions according to claim 1, characterized in that: The outer tube (1) is equipped with several anti-slip blocks (9) on its surface, and the bottom of the outer tube (1) is fixedly connected to a threaded interface (10).

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