Fixed-point scaling system

Abstract

The utility model relates to the technical field of oil and gas gathering and transportation, in particular to a fixed-point scaling system. A fixed-point scaling system comprises a main pipeline and a scaling tank, the main pipeline is connected with the scaling tank through a scaling pipeline, and a cleaning pipeline and a wax removal pipeline are arranged on the scaling tank. The scaling tank is connected with the main pipeline through the scaling pipeline, the scaling tank on the upstream of the gathering and transportation system can conduct scaling and wax precipitation on deposited scales in equipment and a manifold in advance, so that the downstream equipment and the manifold do not contain or hardly contain scaling and wax precipitation components during transportation, the scaling and wax precipitation pressure of a downstream system can be effectively reduced, and the production efficiency of the gathering and transportation system is improved. And moreover, the cleaning pipeline and the wax removal pipeline which are arranged on the scaling tank are more convenient to treat scaling and wax precipitation.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas gathering and transportation, in particular to a fixed-point scaling system. Background Art

[0002] At present, the equipment and pipelines in the ground gathering and transportation and water injection systems of crude oil production are seriously scaled, waxed and corroded, resulting in frequent failures and increasing maintenance costs year by year. The existing prevention and control technologies can no longer fully meet the needs of oilfield scale prevention and wax removal, especially the scaling and waxing problems at multi-layer mixed transportation stations have not been solved. Therefore, it is urgent to carry out research on scale prevention and wax removal technologies in medium and high water-content blocks. Utility Model Content

[0003] The utility model aims to provide a fixed-point scaling system to solve the problem that the existing prevention and control technology has unsatisfactory scaling and waxing treatment effects on equipment and pipelines.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A fixed-point scaling system comprises a main pipeline and a scaling tank. The main pipeline is connected to the scaling tank through a scaling pipeline. A cleaning pipeline and a wax removal pipeline are arranged on the scaling tank.

[0006] A further technical solution is that the scaling pipeline includes a first branch pipeline and a second branch pipeline, the two ends of the first branch pipeline are respectively connected to the front end of the main pipeline and the bottom of the scaling tank, a first gate valve is arranged on the first branch pipeline, the two ends of the second branch pipeline are respectively connected to the rear end of the main pipeline and the top of the scaling tank, a third gate valve is arranged on the second branch pipeline, and a second gate valve is arranged on the main pipeline between the first branch pipeline and the second branch pipeline.

[0007] A further technical solution is that both ends of the cleaning pipeline are connected to the top and bottom of the scaling tank respectively, and a seventh gate valve, a basket filter, a pipeline pump and a fifth gate valve are arranged on the cleaning pipeline from bottom to top.

[0008] A further technical solution is that an auxiliary pipeline is connected to the cleaning pipeline between the pipeline pump and the fifth gate valve, and a sixth gate valve is arranged on the auxiliary pipeline.

[0009] A further technical solution is that the dewaxing pipeline includes an inlet pipeline and an outlet pipeline, the inlet pipeline is connected to the bottom of the scaling tank, an eighth gate valve is arranged on the inlet pipeline, and the outlet pipeline is connected to the top of the scaling tank, a fourth gate valve is arranged on the outlet pipeline.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] In the utility model, the scaling tank is connected to the main pipeline through the scaling pipeline. The scaling tank can scale and wax the scale in the equipment and the manifold in advance at the upstream of the gathering and transportation system, so that the downstream equipment and the manifold transportation contain no or very little scaling and waxing components, thereby effectively reducing the scaling and waxing pressure of the downstream system, and the cleaning pipeline and the wax removal pipeline arranged on the scaling tank will be more convenient in handling scaling and waxing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Icons: 1-main pipeline, 2-scaling tank, 3-first branch pipeline, 4-second branch pipeline, 5-cleaning pipeline, 6-auxiliary pipeline, 7-water inlet pipeline, 8-water outlet pipeline, 9-first gate valve, 10-third gate valve, 11-second gate valve, 12-seventh gate valve, 13-basket filter, 14-pipeline pump, 15-fifth gate valve, 16-sixth gate valve, 17-eighth gate valve, 18-fourth gate valve. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0015] Figure 1 This is an embodiment of the utility model.

[0016] Example 1

[0017] A fixed-point scaling system includes a main pipeline 1 and a scaling tank 2, wherein the main pipeline 1 is connected to the scaling tank 2 through a scaling pipeline, and a cleaning pipeline 5 and a dewaxing pipeline are arranged on the scaling tank 2. The scaling tank 2 is connected to the main pipeline 1 for conveying oil through the scaling pipeline, and the scaling tank 2 can scale and wax the deposits in the equipment and manifold in advance, and then the scaling and waxing are processed by the cleaning pipeline 5 and the dewaxing pipeline, so that the downstream equipment and manifold contain no or very little scaling and waxing components in the conveying, thereby effectively reducing the scaling and waxing pressure of the downstream system.

[0018] Example 2

[0019] On the basis of Example 1, the scaling pipeline includes a first branch pipeline 3 and a second branch pipeline 4, the two ends of the first branch pipeline 3 are respectively connected to the front end of the main pipeline 1 and the bottom of the scaling tank 2, a first gate valve 9 is arranged on the first branch pipeline 3, the two ends of the second branch pipeline 4 are respectively connected to the rear end of the main pipeline 1 and the top of the scaling tank 2, a third gate valve 10 is arranged on the second branch pipeline 4, and a second gate valve 11 is arranged on the main pipeline 1 between the first branch pipeline 3 and the second branch pipeline 4. After closing the second gate valve 11, the oil in the main pipeline 1 will return to the main pipeline 1 after passing through the first branch pipeline 3, the scaling tank 2, and the second branch pipeline 4, and the oil can complete scaling and waxing in the process of passing through the scaling tank 2, so that the equipment and manifold transportation downstream of the main pipeline 1 contain no or very little scaling and waxing components.

[0020] Example 3

[0021] On the basis of Example 2, the two ends of the cleaning pipeline 5 are respectively connected to the top and the bottom of the scaling tank 2, and the seventh gate valve 12, the basket filter 13, the pipeline pump 14 and the fifth gate valve 15 are sequentially arranged on the cleaning pipeline 5 from bottom to top. When the scaling tank 2 needs to be cleaned, the cleaning agent is first added to the cleaning pipeline 5 through the basket filter 13, and the cleaning agent enters from the top of the scaling tank 2 through the cleaning pipeline 5 under the action of the pipeline pump 14, and the cleaning agent flows downstream to clean the inside of the scaling tank 2, and finally re-discharged into the cleaning pipeline 5 through the bottom of the scaling tank 2, and the basket filter 13 can collect the cleaned sediment, and then the basket filter 13 is opened to process the collected scale or solid residue.

[0022] Example 4

[0023] On the basis of Example 3, an auxiliary pipeline 6 is connected to the cleaning pipeline 5 between the pipeline pump 14 and the fifth gate valve 15, and a sixth gate valve 16 is arranged on the auxiliary pipeline 6. After cleaning for a period of time, the sixth gate valve 16 is opened, and the cleaning agent that has no effect can be discharged through the auxiliary pipeline 6.

[0024] Example 5

[0025] On the basis of Example 4, the dewaxing pipeline includes an inlet pipeline 7 and an outlet pipeline 8, the inlet pipeline 7 is connected to the bottom of the scaling tank 2, an eighth gate valve 17 is arranged on the inlet pipeline 7, the outlet pipeline 8 is connected to the top of the scaling tank 2, and a fourth gate valve 18 is arranged on the outlet pipeline 8. The eighth gate valve 17 and the fourth gate valve 18 can control the hot water to enter and exit the scaling tank 2.

[0026] Working principle: When in use, scaling work is first performed, the first gate valve 9 and the third gate valve 10 are opened, and the other gate valves and pipeline pumps are closed. The oil enters the first branch pipeline 3, scaling tank 2, and second branch pipeline 4 from the main pipeline 1 in sequence, and then is re-delivered to the main pipeline 1. The oil completes scaling and waxing in the process of passing through the scaling tank 2, so that the delivered oil contains no or very little scaling and waxing components. Therefore, the scaling and waxing pressure of the downstream system is greatly reduced, and the equipment of the downstream system does not need to be specially treated, and the construction is simple;

[0027] After the scaling tank 2 has been working continuously for a period of time, the scaling tank 2 needs to be cleaned and dewaxed. The first gate valve 9 and the third gate valve 10 are closed to ensure that no oil enters the scaling tank 2. The fifth gate valve 15 and the seventh gate valve 12 are opened, and the pipeline pump 14 is started. At the same time, a cleaning agent is added to the cleaning pipeline 5 through the basket filter 13, so that the cleaning agent can be recycled to fully clean the scaling tank 2. The cleaned scale is collected by the basket filter 13. While the cleaning work is being performed, the eighth gate valve 17 and the fourth gate valve 18 are opened, and hot water is input into the scaling tank 2 through the water inlet pipeline 7 and then output from the water outlet pipeline 8, so that the wax in the scaling tank 2 is melted and mixed with the cleaning agent. The cleaning agent that loses its effectiveness after a certain period of cleaning can be discharged through the auxiliary pipeline 6;

[0028] Finally, the slag cleaning work is carried out. After the cleaning work is completed, the scaling work can be carried out again, so the slag cleaning work can be carried out simultaneously with the scaling work. The upper cover of the basket filter 13 is opened, the filter basket is taken out, the scale or solid residue in the filter basket is cleaned, and then the filter basket and the upper cover are installed back to their original positions.

[0029] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the drawings and claims disclosed herein, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A fixed-point scaling system, characterized in that: It comprises a main pipeline (1) and a scaling tank (2), wherein the main pipeline (1) is connected to the scaling tank (2) via a scaling pipeline, and a cleaning pipeline (5) and a wax removal pipeline are arranged on the scaling tank (2).

2. A fixed-point scaling system according to claim 1, characterized in that: The scaling pipeline comprises a first branch pipeline (3) and a second branch pipeline (4); the two ends of the first branch pipeline (3) are respectively connected to the front end of the main pipeline (1) and the bottom of the scaling tank (2); a first gate valve (9) is arranged on the first branch pipeline (3); the two ends of the second branch pipeline (4) are respectively connected to the rear end of the main pipeline (1) and the top of the scaling tank (2); a third gate valve (10) is arranged on the second branch pipeline (4); and a second gate valve (11) is arranged on the main pipeline (1) between the first branch pipeline (3) and the second branch pipeline (4).

3. A fixed-point scaling system according to claim 1, characterized in that: The two ends of the cleaning pipeline (5) are respectively connected to the top and the bottom of the scaling tank (2), and a seventh gate valve (12), a basket filter (13), a pipeline pump (14) and a fifth gate valve (15) are arranged on the cleaning pipeline (5) from bottom to top.

4. A fixed-point scaling system according to claim 3, characterized in that: The cleaning pipeline (5) between the pipeline pump (14) and the fifth gate valve (15) is connected to an auxiliary pipeline (6), and a sixth gate valve (16) is provided on the auxiliary pipeline (6).

5. A fixed-point scaling system according to claim 1, characterized in that: The wax removal pipeline comprises an inlet pipeline (7) and an outlet pipeline (8); the inlet pipeline (7) is connected to the bottom of the scaling tank (2); an eighth gate valve (17) is provided on the inlet pipeline (7); the outlet pipeline (8) is connected to the top of the scaling tank (2); a fourth gate valve (18) is provided on the outlet pipeline (8).

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