Solid corrosion inhibitor feeding device
By designing an alternating feeding device for storage tanks, mixing tanks, and pressure tanks, the problems of low liquid corrosion inhibitor feeding efficiency and discontinuous solid corrosion inhibitor feeding were solved, realizing continuous feeding of solid corrosion inhibitors, improving feeding efficiency, and reducing equipment maintenance costs.
Patent Information
- Application Number
- CN202520647784.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-04-08
AI Technical Summary
In the existing technology, the addition of liquid corrosion inhibitors has the problems of large workload, high equipment maintenance costs, and ineffective prevention of corrosion of oil casing below the pump port. In addition, the addition of solid corrosion inhibitors has the problem of discontinuous addition.
A solid corrosion inhibitor feeding device was designed, which uses a storage tank, a mixing tank, and first and second pressure tanks. The feeding is achieved alternately through a three-way solenoid valve, and the spherical mixing tank and the guide pipe are used for thorough mixing. The feeding is achieved continuously through the pressurization pipe and the discharge pipe.
It enables continuous addition of solid corrosion inhibitors, improves feeding efficiency, solves the problem of discontinuous feeding, and reduces equipment maintenance costs.
Smart Images
Figure CN223754066U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of well repair operation, and concretely relates to a solid corrosion inhibitor feeding device. BACKGROUND
[0002] Corrosion inhibitor is a chemical substance used on metal surface and plays a protective role, which can reduce the corrosion rate of metal materials while keeping the physical and mechanical properties of metal materials unchanged. In the production and processing of petroleum products, chemical cleaning, atmospheric environment, industrial water, machine, instrument manufacturing and petroleum chemical production process, corrosion inhibitor is usually used for corrosion protection. With the continuous exploitation and production of oil and gas fields, the corrosion of downhole production string is aggravated, and the current common method for inhibiting corrosion is to add liquid corrosion inhibitor. However, adding liquid corrosion inhibitor has the disadvantages of large dosing workload, high maintenance cost of dosing equipment, and the problem of being unable to control the corrosion of oil casing below the pump port. At present, granular solid corrosion inhibitor with good corrosion protection effect is gradually replaced.
[0003] In order to ensure that the solid corrosion inhibitor can fully fill the annular space between the oil pipe and the casing, the solid corrosion inhibitor is usually injected into the annular space with water flow under pressure. Before dosing, the solid corrosion inhibitor is mixed with water, and all valves are closed for pressurization. After pressurization is completed, dosing is carried out and then dosing circulation is carried out. In the process of pressurization and discharge, there is a vacuum period during which dosing cannot be continuous, resulting in low dosing efficiency. SUMMARY
[0004] One object of the present utility model is to provide a solid corrosion inhibitor feeding device, which can realize alternating dosing by the first pressure tank and the second pressure tank, realize continuous injection of solid corrosion inhibitor, and improve the dosing efficiency.
[0005] According to the present utility model, a solid corrosion inhibitor feeding device is provided, which comprises: a storage tank containing solid corrosion inhibitor, a mixing tank in communication with the discharge port of the storage tank and used for mixing solid corrosion inhibitor and water, and a first pressure tank and a second pressure tank connected to the bottom of the mixing tank through a three-way pipeline, wherein a three-way electromagnetic valve is arranged on the three-way pipeline to control the switching of the mixing tank to be in communication with the first pressure tank or the second pressure tank.
[0006] In a preferred embodiment, a flow guide pipe is arranged on the side wall of the mixing tank, with a first end in communication with the inside of the mixing tank, and a second end connected to an external water source.
[0007] In a preferred embodiment, the mixing tank is configured as a sphere.
[0008] In a preferred embodiment, the first pressure tank and the second pressure tank are structurally identical and arranged side by side below the mixing tank.
[0009] In a preferred embodiment, the top and bottom of the first pressure tank are respectively connected with a pressurizing pipe and a discharge pipe, the pressurizing pipe is connected with an external pressurizing device, and the discharge pipe extends to the annular space between the oil pipe and the casing pipe.
[0010] In a preferred embodiment, an electromagnetic valve is arranged on the discharge pipe to control the opening and closing.
[0011] In a preferred embodiment, a safety valve is arranged on the top of the first pressure tank.
[0012] In a preferred embodiment, the solid corrosion inhibitor feeding device further comprises a rack, and the rack has three layers from top to bottom, which are respectively used for arranging the storage tank, the mixing tank and the first pressure tank and the second pressure tank.
[0013] In a preferred embodiment, a discharge mechanism for controlling the discharge of solid corrosion inhibitor is arranged on the discharge port of the storage tank.
[0014] In a preferred embodiment, the discharge mechanism is an electromagnetic discharge valve or a spiral feeder.
[0015] The utility model at least has following technical effects:
[0016] According to the utility model, the storage tank with solid corrosion inhibitor, the mixing tank for mixing solid corrosion inhibitor and water which is communicated with the discharge port of the storage tank, and the first pressure tank and the second pressure tank which are connected with the bottom of the mixing tank through the tee pipe are provided. Since the tee electromagnetic valve is arranged on the tee pipe, the mixing tank is switched to be communicated with the first pressure tank or the second pressure tank, so that the first pressure tank and the second pressure tank are used to realize the alternate feeding, the solid corrosion inhibitor is continuously filled, and the feeding efficiency is improved.
[0017] According to the utility model, the mixing tank is constructed as a sphere, so that the water in the mixing tank is rotated along the inner wall of the mixing tank through the flow guide pipe, and the solid corrosion inhibitor can be fully mixed. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 The overall structure schematic view of the solid corrosion inhibitor feeding device according to one embodiment of the utility model is schematically shown.
[0019] In the application, all the drawings are schematic drawings, which are only used for explaining the principle of the utility model, and are not drawn according to the actual proportion. DETAILED DESCRIPTION
[0020] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0021] In the description of the present application, it should be understood that the terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0022] In the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.
[0023] As shown in Figure 1 The solid corrosion inhibitor feeding device 100 comprises a storage tank 1 with solid corrosion inhibitor inside, a mixing tank 2 communicating with the discharge port of the storage tank 1, and a first pressure tank 7 and a second pressure tank 9 connected with the bottom of the mixing tank 2 through a three-way pipeline, and a three-way electromagnetic valve 4 is arranged on the three-way pipeline for controlling the mixing tank 2 to switch to communicate with the first pressure tank 7 or the second pressure tank 9, and the mixing tank 2 is used for mixing the solid corrosion inhibitor with water.
[0024] According to the present application, the storage tank 1 with solid corrosion inhibitor inside, the mixing tank 2 communicating with the discharge port of the storage tank 1 and used for mixing the solid corrosion inhibitor with water, and the first pressure tank 7 and the second pressure tank 9 connected with the bottom of the mixing tank 2 through a three-way pipeline are provided. Since the three-way electromagnetic valve 4 is arranged on the three-way pipeline for controlling the mixing tank 2 to switch to communicate with the first pressure tank 7 or the second pressure tank 9, the alternating feeding can be realized through the first pressure tank 7 and the second pressure tank 9, the continuous feeding of the solid corrosion inhibitor is realized, and the feeding efficiency is improved.
[0025] In one or more embodiments, a flow guide pipe 3 with a first end communicating with the inside of the side wall of the mixing tank 2 is arranged on the side wall of the mixing tank 2, a second end of the flow guide pipe 3 is connected with an external water source, and is used for conveying water flow to the inside of the mixing tank 2 to mix with the solid corrosion inhibitor.
[0026] In one or more embodiments, the discharge port of the storage tank 1 is provided with a discharge mechanism for controlling the discharge of the solid corrosion inhibitor.
[0027] In one or more embodiments, the mixing tank 2 is in communication with the discharge port at the bottom of the storage tank 1, and the solid corrosion inhibitor inside the storage tank 1 can fall into the mixing tank 2 by gravity, and the discharge mechanism is an electromagnetic discharge valve; in some other embodiments, the storage tank 1 is arranged at the side of the mixing tank 2, and the discharge mechanism is a screw feeder.
[0028] In one or more embodiments, the mixing tank 2 is configured as a sphere, so that the water entering the mixing tank 2 through the flow guide pipe 3 rotates along the inner wall of the mixing tank 2 to fully mix the solid corrosion inhibitor. In this embodiment, the flow guide pipe 3 is configured as an arc, and the flow guide pipe 3 is arranged on the mixing tank 2, and the arc-shaped flow guide pipe 3 can guide the water flow to rotate along the inner wall of the mixing tank 2, thereby further fully mixing the solid corrosion inhibitor.
[0029] In one or more embodiments, the top and bottom of the first pressure tank 7 are respectively connected with a pressurizing pipe 6 for pressurizing the first pressure tank 7 and a discharge pipe 8 for discharging the mixed liquid, wherein the pressurizing pipe 6 is connected with an external pressurizing device, and the discharge pipe 8 extends to the annular space between the oil pipe and the casing pipe, and an electromagnetic valve for controlling opening and closing is arranged on the discharge pipe 8.
[0030] In one or more embodiments, the second pressure tank 9 has the same structure as the first pressure tank 7. The top of the first pressure tank 7 is connected with a safety valve 5, and when the gas pressure in the first pressure tank 7 exceeds a set value, the gas inside the first pressure tank 7 can be discharged through the safety valve 5 to reduce the pressure.
[0031] In one or more embodiments, the solid corrosion inhibitor feeding device 100 further comprises a rack, and the rack has three layers from top to bottom for arranging the storage tank 1, the mixing tank 2 and the pressure tank. Optionally, the rack is made of channel steel by welding.
[0032] In one or more embodiments, the first pressure tank 7 and the second pressure tank 9 are arranged side by side below the mixing tank 2.
[0033] The working principle of the solid corrosion inhibitor feeding device 100 is briefly described as follows: the discharging mechanism at the discharging opening of the storage tank 1 is opened to discharge the solid corrosion inhibitor into the mixing tank 2, the discharging amount of the solid corrosion inhibitor is controlled by controlling the opening time of the discharging mechanism, and the discharging mechanism is closed after the solid corrosion inhibitor is discharged; water is injected into the interior of the mixing tank 2 through the flow guide pipe 3, the water flow enters the mixing tank 2 and rotates in the mixing tank 2 due to the spherical shape of the mixing tank 2, and is fully mixed with the solid corrosion inhibitor; the three-way electromagnetic valve 4 is controlled to connect the mixing tank 2 with the first pressure tank 7, after the mixed liquid in the first pressure tank 7 is filled to a threshold value, the three-way electromagnetic valve 4 is switched to: the three-way pipeline connected to the first pressure tank 7 is in a sealed state, and the three-way pipeline connected to the second pressure tank 9 is in an open state; the first pressure tank 7 is pressurized through the pressurizing pipe 6, and at the same time, the mixing tank 2 discharges the mixed liquid into the interior of the second pressure tank 9 through the three-way pipeline; after the first pressure tank 7 is pressurized, the electromagnetic valve on the discharging pipe 8 is opened to discharge the mixed liquid to the annular space between the oil pipe and the sleeve, after the mixed liquid in the first pressure tank 7 is discharged, the mixed liquid in the second pressure tank 9 is filled and pressurized, and the electromagnetic valve on the discharging pipe 8 of the second pressure tank 9 is opened to continue discharging the mixed liquid to the annular space between the oil pipe and the sleeve, so that the first pressure tank 7 and the second pressure tank 9 are alternately operated.
[0034] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the present application without departing from the scope of the present application, and equivalent substitutions can be made to the components thereof. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A solid corrosion inhibitor dosing device, characterized in that, The application relates to a solid corrosion inhibitor feeding device. The device comprises a storage tank containing solid corrosion inhibitor, a mixing tank communicating with the discharge port of the storage tank and used for mixing the solid corrosion inhibitor and water, and a first pressure tank and a second pressure tank connected with the bottom of the mixing tank through a tee pipe, wherein a tee electromagnetic valve is arranged on the tee pipe to control switching of the mixing tank to communicate with the first pressure tank or the second pressure tank.
2. The solid corrosion inhibitor dosing device of claim 1, wherein, A flow guide pipe is arranged on the side wall of the mixing tank and communicates with the inside of the mixing tank at a first end, and a second end of the flow guide pipe is connected with an external water source.
3. The solid corrosion inhibitor dosing device of claim 2, wherein, The mixing tank is configured as a sphere.
4. The solid corrosion inhibitor dosing device of claim 1, wherein, The first pressure tank and the second pressure tank have the same structure and are arranged side by side below the mixing tank.
5. The solid corrosion inhibitor dosing device of claim 4, wherein, A pressurizing pipe and a discharge pipe are respectively connected with the top and the bottom of the first pressure tank, the pressurizing pipe is connected with an external pressurizing device, and the discharge pipe extends to an annular space between an oil pipe and a casing.
6. The solid corrosion inhibitor dosing device of claim 5, wherein, An electromagnetic valve is arranged on the discharge pipe to control opening and closing.
7. The solid corrosion inhibitor dosing device of any one of claims 4 to 6, wherein, A safety valve is connected with the top of the first pressure tank.
8. The solid corrosion inhibitor dosing device of claim 4, wherein, The solid corrosion inhibitor feeding device further comprises a rack, and the rack has three layers from top to bottom, which are respectively used for arranging the storage tank, the mixing tank and the first pressure tank and the second pressure tank.
9. The solid corrosion inhibitor dosing device of claim 1 or 2, wherein, A discharge mechanism is arranged on the discharge port of the storage tank to control discharge of the solid corrosion inhibitor.
10. The solid corrosion inhibitor dosing device of claim 9, wherein, The discharge mechanism is an electromagnetic discharge valve or a screw feeder.