Conveying-mode-adjustable gas-liquid mixed conveying system

Abstract

The utility model belongs to the technical field of gas-liquid mixed transportation, and relates to a gas-liquid mixed transportation system with an adjustable transportation mode, which comprises a main transportation pipeline, a first pressurizing prying group and a second pressurizing prying group, the first pressurizing prying set is provided with a first inlet and a first outlet, the second pressurizing prying set is provided with a second inlet and a second outlet, the first inlet and the first outlet are connected with a first pipeline and a second pipeline respectively, and the second inlet and the second outlet are connected with a third pipeline and a fourth pipeline respectively; the first pipeline, the second pipeline, the third pipeline and the fourth pipeline are all communicated with the conveying main pipeline, and a series pipeline is connected between the second pipeline and the third pipeline; a first stop valve is arranged on the second pipeline, a second stop valve is arranged on the third pipeline, a third stop valve is arranged on the series pipeline, and the joint of the series pipeline and the second pipeline is located in front of the first stop valve and located behind the second stop valve. The series-parallel connection mode can be switched according to working conditions, operation is easy, and the utilization rate is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of crude oil production and transportation, and relates to a gas-liquid mixed transportation system with adjustable transportation mode. Background Art

[0002] During the gas and liquid transportation process at oil and gas wells, wellhead pressure reduction and gathering pipeline pressure boosting equipment are essential to reduce wellhead pressure to increase production and ensure effective pressure boosting in the output pipeline. However, a common phenomenon in oil and gas wells is that the oil and gas output and pressure are low and unstable. New wells typically have higher pressure and oil and gas production, but as production progresses, production gradually decreases, and the pressure also drops.

[0003] To address this characteristic, existing mixed-flow equipment, when planned and installed at single wells or gathering stations, often utilizes large-volume, high-lift mixed-flow units to meet initial demand. These units can be used individually or in parallel. However, as oil and gas wells enter the later stages of production, production decreases and pressure falls. Continued use of large-volume, high-lift mixed-flow units (whether standalone or in parallel) fails to achieve the desired pressure boosting effect. Continuing to operate the equipment at full capacity at this point would waste energy. Reducing the operating load or shutting down some of the parallel units would reduce equipment utilization and increase investment costs. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a gas-liquid mixed delivery system with adjustable delivery mode.

[0005] To achieve the above-mentioned purpose, the utility model provides a gas-liquid mixed transmission system with adjustable transmission mode, comprising a transmission main line, a first boosting skid assembly and a second boosting skid assembly;

[0006] The first boosting skid assembly has a first inlet and a first outlet, the second boosting skid assembly has a second inlet and a second outlet, the first inlet and the first outlet are connected to a first pipe and a second pipe respectively, and the second inlet and the second outlet are connected to a third pipe and a fourth pipe respectively;

[0007] The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are all connected to the main transmission line, and a series pipeline is connected between the second pipeline and the third pipeline;

[0008] The second pipeline is provided with a first stop valve, the third pipeline is provided with a second stop valve, and the series pipeline is provided with a third stop valve, and the connection between the series pipeline and the second pipeline is located between the first stop valve and the first outlet, and the connection between the series pipeline and the third pipeline is located between the second stop valve and the second outlet.

[0009] Furthermore, a fourth stop valve and a one-way valve are provided on the main delivery line.

[0010] The beneficial effects of the utility model are as follows:

[0011] The gas-liquid mixed delivery system with adjustable delivery mode of the utility model can switch between series and parallel modes according to working conditions through the above-mentioned structural arrangement, and has simple operation and high utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The structure of a gas-liquid mixed transmission system with adjustable transmission mode according to one embodiment of the present invention is schematically shown.

[0013] The meanings of the numbers in the accompanying drawings are as follows:

[0014] 1. Conveying main line; 2. First booster skid assembly; 3. Second booster skid assembly; 21. First inlet; 22. First outlet; 31. Second inlet; 32. Second outlet; 4. First pipeline; 5. Second pipeline; 6. Third pipeline; 7. Fourth pipeline; 8. Series pipeline; 51. First stop valve; 61. Second stop valve; 81. Third stop valve; 11. Fourth stop valve; 12. One-way valve. DETAILED DESCRIPTION

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0016] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not limited to the following embodiments.

[0017] like Figure 1 As shown, the utility model provides a gas-liquid mixed transportation system with an adjustable transportation mode, comprising a transportation main line 1, a first boosting skid group 2 and a second boosting skid group 3, wherein one end of the transportation main line 1 is connected to the liquid inlet of the gathering pipeline, and the other end is connected to the liquid outlet of the gathering pipeline, and is used to pressurize the oil-liquid mixture at the inlet of the gathering pipeline and then transport it, so as to achieve well / station decompression and gathering pipeline pressurization to increase the transportation distance.

[0018] According to one embodiment of the present invention, the first booster skid assembly 2 has a first inlet 21 and a first outlet 22, and the second booster skid assembly 3 has a second inlet 31 and a second outlet 32. The first inlet 21 and the first outlet 22 are connected to a first pipe 4 and a second pipe 5, respectively, and the second inlet 31 and the second outlet 32 ​​are connected to a third pipe 6 and a fourth pipe 7, respectively. The first pipe 4, the second pipe 5, the third pipe 6, and the fourth pipe 7 are all connected to the main transmission line 1, and a series pipe 8 is connected between the second pipe 5 and the third pipe 6. The second pipe 5 is provided with a first stop valve 51, the third pipe 6 is provided with a second stop valve 61, and the series pipe 8 is provided with a third stop valve 81. The connection between the series pipe 8 and the second pipe 5 is located between the first stop valve 51 and the first outlet 22, and the connection between the series pipe 8 and the third pipe 6 is located between the second stop valve 61 and the second outlet 32. The main transmission line 1 is provided with a fourth stop valve 11 and a one-way valve 12.

[0019] The adjustable gas-liquid mixed transmission system of the present invention operates in parallel mode when a new well has high pressure and oil and gas production. That is, the first stop valve 51 and the second stop valve 61 are opened, and the third stop valve 81 is closed. Gas and liquid are transported backward through the main transmission line 1, passing through the first pipeline 4 and the third pipeline 6, respectively, into the first booster skid assembly 2 and the second booster skid assembly 3. Then, they are collected through the second pipeline 5 and the fourth pipeline 7 and returned to the main transmission line 1 for further backward transmission. This increases production, reduces wellhead pressure, and raises the pressure of the gathering pipeline. However, as the oil and gas well enters the later stages of production, production decreases and pressure drops. The adjustable gas-liquid mixed transmission system of the present invention switches to series mode to ensure that the pressure of the gathering pipeline is always maintained at a predetermined value. That is, the first stop valve 51 and the second stop valve 61 are closed, and the third stop valve 81 is opened. Gas and liquid are transported sequentially through the first pipeline 4, the first booster skid assembly 2, the series pipeline 8, the third pipeline 6, the second booster skid assembly 3, and the fourth pipeline 7.

[0020] The utility model's adjustable gas-liquid mixed delivery system avoids the need for large-displacement, high-lift mixed delivery devices, thereby reducing equipment acquisition costs. Furthermore, the utility model's adjustable gas-liquid mixed delivery system can automatically switch between series and parallel modes according to operating conditions, resulting in simple operation and high utilization. This not only improves the adaptability and flexibility of the equipment, but also reduces operating costs and achieves efficient resource utilization.

[0021] The above description is merely one embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A gas-liquid mixed delivery system with adjustable delivery mode, characterized in that: It comprises a main conveying line (1), a first boosting skid assembly (2) and a second boosting skid assembly (3); The first boost skid assembly (2) has a first inlet (21) and a first outlet (22), the second boost skid assembly (3) has a second inlet (31) and a second outlet (32), the first inlet (21) and the first outlet (22) are connected to a first pipe (4) and a second pipe (5) respectively, and the second inlet (31) and the second outlet (32) are connected to a third pipe (6) and a fourth pipe (7) respectively; The first pipeline (4), the second pipeline (5), the third pipeline (6) and the fourth pipeline (7) are all connected to the main conveying line (1), and a series pipeline (8) is connected between the second pipeline (5) and the third pipeline (6); The second pipeline (5) is provided with a first stop valve (51), the third pipeline (6) is provided with a second stop valve (61), and the series pipeline (8) is provided with a third stop valve (81), and the connection point between the series pipeline (8) and the second pipeline (5) is located between the first stop valve (51) and the first outlet (22), and the connection point between the series pipeline (8) and the third pipeline (6) is located between the second stop valve (61) and the second outlet (32).

2. The gas-liquid mixed transportation system with adjustable transportation mode according to claim 1 is characterized in that: The main delivery line (1) is provided with a fourth stop valve (11) and a one-way valve (12).

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