A device for adding corrosion inhibitors to gathering and transportation pipelines.

Abstract

This invention provides a device for adding corrosion inhibitors to gathering and transportation pipelines, comprising: a first mixing tank, a second mixing tank, an observation box, and a recovery tank. The first and second mixing tanks are respectively connected to the inlet of the pipeline to be maintained. The outlet of the pipeline to be maintained is connected to the inlet of the observation box. The outlet of the observation box is connected to the inlet of the recovery tank via a return pipe equipped with a valve and a filter assembly. The outlet of the recovery tank is connected to either the first or second mixing tank. This invention can shorten the waiting time required for preparing corrosion inhibitors, accelerate the preparation and dosing of corrosion inhibitors, and improve pipeline maintenance efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas gathering and transportation technology, specifically, it relates to a device for adding corrosion inhibitors to gathering and transportation pipelines. Background Technology

[0002] Gathering and transportation pipelines include pipelines connecting oil and gas wells to oil and gas processing plants and from oil and gas processing plants to oil and gas storage facilities. These pipelines have small diameters, low pressures, and are mostly made of steel pipes, primarily used for oil extraction, processing, transportation, and storage. Because the medium transported in these pipelines is crude oil, they require strong corrosion resistance and need to be flushed with corrosion inhibitors to slow down the aging process.

[0003] The existing maintenance methods for using corrosion inhibitors to maintain pipelines have the following drawbacks: the corrosion inhibitor is usually mixed with water first, and then added and delivered to the pipeline to be maintained. When the required amount of corrosion inhibitor is insufficient, it needs to be prepared again, which results in a relatively long preparation time for each corrosion inhibitor and low pipeline maintenance efficiency. Utility Model Content

[0004] One objective of this invention is to provide a device for adding corrosion inhibitors to gathering and transportation pipelines, so as to shorten the waiting time required for preparing corrosion inhibitors, accelerate the preparation and application of corrosion inhibitors, and improve pipeline maintenance efficiency.

[0005] According to this utility model, a device for adding corrosion inhibitor to a gathering and transportation pipeline is provided, comprising: a first stirring tank, a second stirring tank, an observation box, and a recovery tank. The first stirring tank and the second stirring tank are respectively connected to the inlet of the pipeline to be maintained. The outlet of the pipeline to be maintained is connected to the inlet of the observation box. The outlet of the observation box is connected to the inlet of the recovery tank through a return pipe. The return pipe is equipped with a valve and a filter assembly. The outlet of the recovery tank is connected to either the first stirring tank or the second stirring tank.

[0006] In a preferred embodiment, the filter assembly is located near the inlet of the recovery tank.

[0007] In a preferred embodiment, the valve is a three-way valve, with the first end connected to the observation box, the second end connected to the filter assembly, and the third end used to discharge the corrosion inhibitor.

[0008] In a preferred embodiment, the device for adding corrosion inhibitor to the gathering and transportation pipeline further includes a crushing mechanism, the discharge port of which is provided with a switching valve, which is connected to the first mixing tank or the second mixing tank by switching.

[0009] In a preferred embodiment, the crushing mechanism includes: a crushing box and two crushing shafts rotatably disposed within the crushing box, the two crushing shafts being meshed by gears, and a crushing motor connected to the crushing shafts and used to drive the crushing shafts to rotate is also provided on the side of the crushing box.

[0010] In a preferred embodiment, the device for adding corrosion inhibitor to the gathering and transportation pipeline further includes: a mounting frame erected on the top surface of the first mixing tank and the second mixing tank, and the crushing mechanism is disposed on the mounting frame.

[0011] In a preferred embodiment, the second mixing tank has the same structure as the first mixing tank. The first mixing tank includes a tank body and a stirring rod rotatably disposed in the tank body. The top of the tank body is provided with a water inlet and a stirring motor connected to the stirring rod and used to drive the stirring rod to rotate.

[0012] In a preferred embodiment, a pipe heater is provided at the water inlet of both the first mixing tank and the second mixing tank.

[0013] In a preferred embodiment, the bottoms of the first mixing tank and the second mixing tank are respectively connected to the inlet of the pipe to be maintained via a first connecting pipe and a second connecting pipe, and both the first connecting pipe and the second connecting pipe are equipped with an on / off valve.

[0014] In a preferred embodiment, both the first connecting pipe and the second connecting pipe are connected to the pipe to be maintained via a main pipe.

[0015] This utility model has at least the following technical effects:

[0016] According to this utility model, a first mixing tank, a second mixing tank, an observation box, and a recovery tank are provided. The first and second mixing tanks are respectively connected to the inlet of the pipeline to be maintained. The outlet of the pipeline to be maintained is connected to the inlet of the observation box. The outlet of the observation box is connected to the inlet of the recovery tank through a return pipe. The return pipe is equipped with a valve and a filter assembly, and the outlet of the recovery tank is connected to either the first or second mixing tank. When it is observed that the returned corrosion inhibitor contains relatively few impurities, the returned corrosion inhibitor can be filtered and reused, thus eliminating the need to prepare the corrosion inhibitor again and accelerating the dosage of the corrosion inhibitor. If the returned corrosion inhibitor contains many impurities, the second mixing tank can be used to prepare the corrosion inhibitor in advance, enabling rapid addition of the corrosion inhibitor and improving the efficiency of pipeline maintenance. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a device for adding corrosion inhibitors to a gathering and transportation pipeline according to an embodiment of the present invention is shown.

[0018] In this application, all the accompanying drawings are schematic drawings, used only to illustrate the principle of the present invention, and are not drawn to scale. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of the utility model, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0021] In this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] like Figure 1 As shown, the device 100 for adding corrosion inhibitor to a gathering and transportation pipeline according to this utility model includes: a first stirring tank 1 and a second stirring tank 2. Both the first stirring tank 1 and the second stirring tank 2 are used to stir and prepare the corrosion inhibitor. The first stirring tank 1 and the second stirring tank 2 are respectively connected to the inlet of the pipeline 5 to be maintained. For example, the bottoms of the first stirring tank 1 and the second stirring tank 2 are respectively connected to the inlet of the pipeline 5 to be maintained through a first connecting pipe b and a second connecting pipe c. Both the first connecting pipe b and the second connecting pipe c are equipped with on / off valves. The outlet of the pipeline 5 to be maintained is connected to the inlet of an observation box 6. The side surface of the observation box 6 is provided with a glass window for observing the corrosion inhibitor flowing back from the pipeline 5 to be maintained. The outlet of the observation box 6 is connected to the inlet of a recovery tank 4 through a return pipe. The return pipe is equipped with a valve 7 and a filter assembly 8. The outlet of the recovery tank 4 is connected to either the first stirring tank 1 or the second stirring tank 2.

[0023] The working process of the corrosion inhibitor dosing device 100 for gathering and transportation pipelines described in this utility model is briefly described below. In use, the corrosion inhibitor solution in the first mixing tank 1 or the second mixing tank 2 is discharged into the pipeline 5 to be maintained via a pipeline. After being discharged from the pipeline 5, the corrosion inhibitor solution first enters the observation box 6. The corrosion inhibitor solution is observed through the observation box 6. If the corrosion inhibitor solution has few impurities, the observation box 6 is connected to the recovery tank 4 through the valve 7. The corrosion inhibitor solution is filtered by the filter assembly 8 and then enters the recovery tank 4, and then from the recovery tank 4 into the first mixing tank 1 or the second mixing tank 2 for secondary use. There is no need to prepare the corrosion inhibitor again, thereby improving the addition speed and efficiency of the corrosion inhibitor. If the observation box 6 shows that the corrosion inhibitor solution has many impurities, the corrosion inhibitor can be prepared through the second mixing tank 2 to reduce waiting time and speed up the preparation and dosing of the corrosion inhibitor.

[0024] According to this utility model, a first mixing tank 1, a second mixing tank 2, an observation box 6, and a recovery tank 4 are provided. The first mixing tank 1 and the second mixing tank 2 are respectively connected to the inlet of the pipeline 5 to be maintained. The outlet of the pipeline 5 to be maintained is connected to the inlet of the observation box 6. The outlet of the observation box 6 is connected to the inlet of the recovery tank 4 via a return pipe. The return pipe is equipped with a valve 7 and a filter assembly 8, and the outlet of the recovery tank 4 is connected to either the first mixing tank 1 or the second mixing tank 2. When it is observed that the returned corrosion inhibitor contains relatively few impurities, the returned corrosion inhibitor can be filtered and reused, thus eliminating the need to prepare the corrosion inhibitor again and accelerating the dosage of the corrosion inhibitor. Conversely, if the returned corrosion inhibitor contains many impurities, the second mixing tank 2 can be used to prepare the corrosion inhibitor in advance, enabling rapid addition of the corrosion inhibitor and improving pipeline maintenance efficiency.

[0025] In one or more embodiments, the filter assembly 8 is disposed near the inlet of the recovery tank 4.

[0026] In one or more embodiments, valve 7 is a three-way valve, with the first end of valve 7 connected to observation box 6, the second end connected to filter assembly 8, and the third end serving as an outlet for discharging corrosion inhibitor.

[0027] In one or more embodiments, both the first connecting pipe b and the second connecting pipe c are connected to the pipe 5 to be maintained via the main pipe a.

[0028] In one or more embodiments, the filter assembly 8 includes a connecting pipe sleeved around the outer periphery of the return pipe and a filter screen (not shown) and an adsorption element (not shown) disposed inside the connecting pipe. The filter screen is used to filter large particulate impurities in the high-temperature corrosion inhibitor. Optionally, the adsorption element is a magnet block with multiple arc-shaped through holes on its main body. When the high-temperature corrosion inhibitor passes through the arc-shaped through holes, the fine iron filings therein are adsorbed onto the magnet block, thereby improving the impurity removal effect.

[0029] In one or more embodiments, the dosing device 100 for corrosion inhibitors in gathering and transportation pipelines according to this invention further includes a pulverizing mechanism 3 for pulverizing the corrosion inhibitor. The discharge port of the pulverizing mechanism 3 is equipped with a switching valve, which is connected to either the first mixing tank 1 or the second mixing tank 2 via switching. Optionally, the switching valve is a three-way switching valve. In use, the switching valve is used to connect the pulverizing mechanism 3 to the first mixing tank 1. The corrosion inhibitor is pulverized by the pulverizing mechanism 3 to break the corrosion inhibitor particles into powder, which is then discharged into the first mixing tank 1. This accelerates the dissolution of the corrosion inhibitor, speeds up the preparation of the corrosion inhibitor, and shortens the time required to prepare the corrosion inhibitor.

[0030] In one or more embodiments, the crushing mechanism 3 includes a crushing box and two crushing shafts rotatably disposed inside the crushing box. The two crushing shafts are meshed by gears. The side of the crushing box is also provided with a crushing motor connected to the crushing shafts and used to drive the crushing shafts to rotate.

[0031] In one or more embodiments, the dosing device 100 for corrosion inhibitors in gathering and transportation pipelines according to the present invention further includes: a mounting frame erected on the top surface of the first mixing tank 1 and the second mixing tank 2, and a crushing mechanism 3 disposed on the mounting frame.

[0032] In one or more embodiments, the recovery tank 4 is located below the first mixing tank 1 and the second mixing tank 2, and a water pump for drawing corrosion inhibitor into the first mixing tank 1 or the second mixing tank 2 is also provided on the pipeline connecting the recovery tank 4 to the first mixing tank 1 or the second mixing tank 2.

[0033] In one or more embodiments, the second mixing tank 2 has the same structure as the first mixing tank 1. The first mixing tank 1 includes a tank body and a stirring rod rotatably disposed in the tank body. The top of the tank body is provided with a water inlet and a stirring motor connected to the stirring rod and used to drive the stirring rod to rotate.

[0034] In one or more embodiments, a pipe heater is provided at the water inlet of both the first mixing tank 1 and the second mixing tank 2. The water temperature can be adjusted by the pipe heater to accelerate the dissolution of the corrosion inhibitor.

[0035] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A device for dosing corrosion inhibitor for gathering pipelines, characterized in that, include: The system comprises a first mixing tank, a second mixing tank, an observation box, and a recovery tank. The first and second mixing tanks are respectively connected to the inlet of the pipeline to be maintained. The outlet of the pipeline to be maintained is connected to the inlet of the observation box. The outlet of the observation box is connected to the inlet of the recovery tank through a return pipe. The return pipe is equipped with a valve and a filter assembly. The outlet of the recovery tank is connected to either the first or the second mixing tank.

2. The device for adding corrosion inhibitor to gathering pipeline according to claim 1, characterized in that, The filter assembly is located near the inlet of the recovery tank.

3. The device for adding corrosion inhibitor to gathering pipeline according to claim 2, characterized in that, The valve is a three-way valve, with the first end connected to the observation box, the second end connected to the filter assembly, and the third end used to discharge the corrosion inhibitor.

4. The dosing device for corrosion inhibitor in gathering and transportation pipelines according to claim 1 further includes a crushing mechanism, wherein the discharge port of the crushing mechanism is provided with a switching valve, and the switching valve is connected to the first mixing tank or the second mixing tank by switching.

5. The device for adding corrosion inhibitor to gathering pipeline according to claim 4, characterized in that, The crushing mechanism includes: a crushing box and two crushing shafts rotatably disposed inside the crushing box. The two crushing shafts are meshed by gears. The side of the crushing box is also provided with a crushing motor connected to the crushing shafts and used to drive the crushing shafts to rotate.

6. The device for adding a corrosion inhibitor to a gathering pipeline according to claim 4, characterized in that, Also includes: A mounting frame is erected on the top surface of the first mixing tank and the second mixing tank, and the crushing mechanism is mounted on the mounting frame.

7. The device for dosing a corrosion inhibitor for a gathering pipeline according to any one of claims 1 to 6, characterized in that, The second mixing tank has the same structure as the first mixing tank. The first mixing tank includes a tank body and a stirring rod rotatably disposed in the tank body. The top of the tank body is provided with a water inlet and a stirring motor connected to the stirring rod and used to drive the stirring rod to rotate.

8. The device for adding a corrosion inhibitor to a gathering pipeline according to claim 7, characterized in that, Both the first and second mixing tanks are equipped with pipe heaters at their water inlets.

9. The dosing device for corrosion inhibitor in gathering and transportation pipelines according to claim 7, wherein the bottoms of the first mixing tank and the second mixing tank are respectively connected to the inlet of the pipeline to be maintained through a first connecting pipe and a second connecting pipe, and both the first connecting pipe and the second connecting pipe are provided with an on / off valve.

10. The device for adding corrosion inhibitor to a gathering and transportation pipeline according to claim 9, wherein the first connecting pipeline and the second connecting pipeline are both connected to the pipeline to be maintained via a main pipeline.

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