Wellhead throttling gas transmission system

Abstract

The utility model relates to the technical field of platform well production and transportation, in particular to a wellhead throttling gas transmission system which comprises at least two gas production pipelines, each gas production pipeline is connected with a gathering and transportation pipeline through a throttling pipeline, the at least two gas production pipelines are connected to a water jacket furnace, and the water jacket furnace is connected with each gathering and transportation pipeline. The multiple gas production pipelines are matched with one water jacket furnace, the number of the water jacket furnaces in the multi-well state is reduced, the occupied area of the water jacket furnaces is reduced, the gas conveying system is simple in structure, meanwhile, the water jacket furnaces and the throttling pipelines are arranged in parallel, the gas production pipelines can be adjusted to be communicated with the water jacket furnaces or the throttling pipelines according to the actual situation, and the gas production efficiency is improved. Natural gas conveying through the water jacket furnace or natural gas conveying through the throttling pipeline is achieved, when the gas production pipeline conveys the natural gas through the throttling pipeline, the water jacket furnace can be maintained and overhauled, maintenance of the water jacket furnace is facilitated, and the maintenance requirement is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of platform well production and transportation, in particular to a wellhead throttling gas transmission system. Background Art

[0002] With the advancement of drilling technology, the use of platform well technology is becoming more and more widespread. Platform well mining is the simultaneous production of multiple wells in a platform, and centralized management of all wellheads. In platform well production, due to the single-well natural gas gathering and transportation process, the gas well needs to be opened and closed so that the natural gas output from the wellhead has sufficient gas pressure to achieve transportation. When the well is closed for a period of time and then opened again, hydrate blockage is prone to occur due to the low wellhead temperature and the inability of the gas well to produce water and heat up immediately. Therefore, each well needs to be equipped with a complete set of water jacket furnace equipment to heat the natural gas produced at the wellhead through the water jacket furnace equipment so that the natural gas is heated to the process required temperature to prevent the formation of hydrates, thereby reducing the probability of hydrate blockage.

[0003] For platform well mining, multiple water-jacket furnaces need to be set up in one platform according to the number of wellheads. Multiple water-jacket furnace equipment occupies a large area, has a complex structure and high maintenance requirements. In addition, each water-jacket furnace requires independent control and energy supply, and there is also the problem of high energy consumption. Utility Model Content

[0004] The utility model aims to overcome the technical problems in the prior art that a platform well needs to be equipped with multiple water jacket furnaces according to the number of wellheads, which occupies a large area, has a complex structure and high maintenance requirements, and provides a wellhead throttling gas transmission system.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0006] A wellhead throttling gas transmission system comprises at least two gas production pipelines, each of which is connected to a gathering pipeline via a throttling pipeline, and at least two of the gas production pipelines are connected to a water jacket furnace, which is connected to each of the gathering pipelines.

[0007] The utility model discloses a wellhead throttling gas transmission system, in which a water jacket furnace is arranged in conjunction with a plurality of gas production pipelines, so that the number of water jacket furnaces arranged in a multi-well state is reduced, the area occupied by the water jacket furnace is reduced, and the structure of the gas transmission system is simple. At the same time, the water jacket furnace and the throttling pipeline are arranged in parallel, and the gas production pipeline can be connected with the gathering pipeline through the water jacket furnace, and can also be connected with the gathering pipeline through the throttling pipeline, so that the gas production pipeline can be adjusted to be connected with the water jacket furnace or the throttling pipeline according to actual conditions, so as to realize the natural gas transmission through the water jacket furnace or the natural gas transmission through the throttling pipeline. When the gas production pipeline is transported through the throttling pipeline, the water jacket furnace can be maintained and repaired, which is convenient for the maintenance of the water jacket furnace and reduces the maintenance requirements.

[0008] As a preferred solution of the utility model, the gas production pipeline includes a gas wellhead and a gas production tree connected by pipelines, and the gas production tree is connected to the throttling pipeline and / or the water jacket furnace pipeline.

[0009] As a preferred solution of the utility model, the throttling pipeline is provided with a throttling valve, through which the gas delivery state of the throttling pipeline can be adjusted.

[0010] As a preferred solution of the utility model, the throttle valve is a needle angle valve. The needle angle valve has the characteristic that the inlet axis and the outlet axis form a 90° angle, which can be easily assembled to form a compact pipeline structure, facilitate the integration and modularization of multiple throttling pipelines, further reduce the floor space of the gas transmission system, and reduce the site acquisition and construction costs.

[0011] As a preferred solution of the utility model, a first valve is provided between the throttle valve and the gas collection pipeline, and the first valve can cut off the throttle pipeline, so that the on-off of the throttle pipeline can be controlled by the first valve.

[0012] As a preferred solution of the utility model, a second valve is arranged between the throttle valve and the gathering pipeline, the second valve can cut off the throttle pipeline, the first valve, the throttle valve and the second valve are arranged in sequence along the airflow direction, and the inlet sides of the first valve and the third valve are connected to the pipeline diversion port. The second valve can control the on-off of the throttle pipeline, and cooperates with the first valve to realize the independent operation of the throttle pipeline and the pipeline where the water jacket furnace is located.

[0013] As a preferred solution of the present utility model, the first valve and the second valve are gate valves or stop valves.

[0014] As a preferred solution of the utility model, a third valve is provided between each of the gas production pipelines and the water jacket furnace, and the third valve is a gate valve or a stop valve, so that the third valve controls the on-off of the gas production pipeline and the water jacket furnace.

[0015] As a preferred solution of the utility model, a fourth valve is respectively arranged between the water jacket furnace and each of the gathering and transportation pipelines, the fourth valve is a gate valve or a stop valve, the third valve, the water jacket furnace and the fourth valve are arranged in sequence along the airflow direction, and the outlet sides of the second valve and the fourth valve are connected to the pipeline confluence. The fourth valve controls the passage between the gas production pipeline and the water jacket furnace, and cooperates with the third valve to realize the independent operation of the throttling pipeline and the pipeline where the water jacket furnace is located.

[0016] As a preferred solution of the utility model, two, three or four gas production pipelines are connected in parallel to one water jacket furnace, so that one water jacket furnace can switch between multiple wellheads normally and maximize the utilization of the heat of the water jacket furnace.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model is a wellhead throttling gas transmission system, in which a water jacket furnace is provided for multiple gas production pipelines, so as to reduce the number of water jacket furnaces provided in a multi-well state, reduce the area occupied by the water jacket furnaces, and simplify the structure of the gas transmission system;

[0019] 2. The utility model provides a wellhead throttling gas transmission system, in which a water jacket furnace and a throttling pipeline are arranged in parallel, and the gas production pipeline can be connected to the gathering pipeline through the water jacket furnace, and can also be connected to the gathering pipeline through the throttling pipeline, so that the gas production pipeline can be adjusted to be connected with the water jacket furnace or the throttling pipeline according to actual conditions, so as to realize the natural gas transmission through the water jacket furnace or the natural gas transmission through the throttling pipeline. When the gas production pipeline is transported through the throttling pipeline, the water jacket furnace can be maintained and repaired, which is convenient for the maintenance of the water jacket furnace and reduces the maintenance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a wellhead throttling gas transmission system in Example 1 Figure 1 ;

[0021] Figure 2 A schematic diagram of the structure of a wellhead throttling gas transmission system in Example 1 Figure 2 ;

[0022] Markings in the figure: 1-gas production pipeline, 11-gas wellhead, 12-gas tree, 2-throttling pipeline, 21-throttling valve, 22-first valve, 23-second valve, 3-gathering pipeline, 4-water jacket furnace, 5-third valve, 6-fourth valve, 7-pipeline diversion port, 8-pipeline confluence port. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in combination with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0024] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the product / equipment / device of the utility model when it is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding devices / components / elements are within the error / deviation range, they can still achieve their functions in the solution of the utility model.

[0026] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0027] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0028] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0029] Example 1

[0030] like Figure 1 As shown, a wellhead throttling gas transmission system, taking two gas production pipelines 1 as an example, the two gas production pipelines 1 are connected to corresponding gathering pipelines 3 through throttling pipelines 2 respectively, and the two gas production pipelines 1 are connected to a water jacket furnace 4, and the water jacket furnace 4 is connected to each of the gathering pipelines 3 respectively.

[0031] In this embodiment, the gas production pipeline 1 includes a gas wellhead 11 and a gas production tree 12 connected by pipelines. The gas production tree 12 is connected to either the throttling pipeline 2 or the water jacket furnace 4. A first valve 22, a throttling valve 21 and a second valve 23 are sequentially arranged on the throttling pipeline 2 along the air flow direction. The first valve 22 and the second valve 23 can both control the on and off of the throttling pipeline 2. The throttling valve 21 can adjust the gas flow rate to achieve gas delivery state adjustment.

[0032] Preferably, the first valve 22 and the second valve 23 are both gate valves or stop valves, which have a simple structure, are easy to operate, and are easy to maintain, and can better meet the technical requirements of on-site operations.

[0033] Preferably, the throttle valve 21 is a needle angle valve. The needle angle valve has the characteristic that the inlet axis and the outlet axis form an angle of 90°, which can be easily assembled to form a compact pipeline structure, facilitate the integration and modularization of multiple throttling pipelines 2, further reduce the floor space of the gas transmission system, and reduce the site requisition and construction costs. At the same time, the flow coefficient curve of the needle valve core is stable, the throttling effect is good, and it can meet the technical requirements of on-site use.

[0034] In this embodiment, a third valve 5 is arranged between the inlet side of the water jacket furnace 4 and each gas production pipeline 1, a fourth valve 6 is arranged between the outlet side of the water jacket furnace 4 and each gathering pipeline 3, and the inlet sides of the first valve 22 and the third valve 5 are connected to a pipeline diversion port 7, and the outlet sides of the second valve 23 and the fourth valve 6 are connected to a pipeline confluence port 8, so that the throttling pipeline 2 is arranged in parallel with the pipeline where the water jacket furnace 4 is located, and can work independently.

[0035] Preferably, the third valve 5 and the fourth valve 6 are both gate valves.

[0036] In a wellhead throttling gas transmission system of the present embodiment, two gas production pipelines 1 are equipped with a water jacket furnace 4, which reduces the number of water jacket furnaces 4 in a multi-well state, reduces the floor space occupied by the water jacket furnace 4, and makes the gas transmission system structure simple. At the same time, the pipeline where the water jacket furnace 4 is located and the throttling pipeline 2 are arranged in parallel. When in use, the gas production pipeline 1 can be connected to the gathering pipeline 3 through the water jacket furnace 4, and can also be connected to the gathering pipeline 3 through the throttling pipeline 2, so that the gas production pipeline 1 can be adjusted to be connected with the water jacket furnace 4 or the throttling pipeline 2 according to actual conditions, so as to realize the natural gas transmission through the water jacket furnace 4 or the natural gas transmission through the throttling pipeline 2. When the gas production pipeline 1 is transporting through the throttling pipeline 2, the water jacket furnace 4 can be maintained and repaired, which is convenient for the maintenance of the water jacket furnace 4 and reduces the maintenance requirements.

[0037] A wellhead throttling gas transmission system of the present embodiment is used. When a gas production pipeline 1 is opened for gas production, the third valve 5 and the fourth valve 6 on the pipeline where the water jacket furnace 4 is located are first opened, so that the natural gas of the gas production pipeline 1 is transported along the water jacket furnace 4 and enters the corresponding gathering pipeline 3, so that the natural gas whose temperature has not yet risen in the early stage of wellhead gas production is heated by the water jacket furnace 4, and then enters the gathering pipeline 3 after the temperature is raised to the transportation standard. After the temperature of the wellhead output natural gas has risen to the transportation standard, the first valve 22 and the second valve 23 on the throttling pipeline 2 are opened, the throttling valve 21 is adjusted according to the working conditions, and then the third valve 5 and the fourth valve 6 of the pipeline where the water jacket furnace 4 is located in parallel with the throttling pipeline 2 are closed, so that the natural gas is transported along the throttling pipeline 2 corresponding to the gas production pipeline 1, and then transported to the downstream through the gathering pipeline 3. In daily use, the throttling pipeline 2 composed of the first valve 22, the throttle valve 21 and the second valve 23 replaces the water jacket furnace 4 to realize natural gas transportation, which greatly reduces the overall equipment volume and weight of the wellhead gas transmission system, reduces the floor space, reduces the site requisition and construction costs, and is simple to operate and easy to maintain, convenient for centralized management, and reduces equipment maintenance costs.

[0038] Furthermore, in some other embodiments, Figure 2 As shown, three or four gas production pipelines 1 may be connected in parallel to one water jacket furnace 4. One water jacket furnace 4 can be switched between multiple wellheads to maximize the utilization of the heat of the water jacket furnace 4. At the same time, for adjacent gas production pipelines 1, switching work can be performed to connect to the water jacket furnace 4 or to connect to the throttling pipeline 2 according to actual conditions to ensure smooth delivery of the gas flow at the wellhead 11 of the gas well.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wellhead throttling gas transmission system, characterized in that: It comprises at least two gas production pipelines (1), each of the gas production pipelines (1) being connected to a gathering pipeline (3) via a throttling pipeline (2), and at least two of the gas production pipelines (1) being connected to a water jacket furnace (4), and the water jacket furnace (4) being connected to each of the gathering pipelines (3).

2. A wellhead throttling gas transmission system as claimed in claim 1, characterized in that: The gas production pipeline (1) comprises a gas wellhead (11) and a gas production tree (12) which are connected by pipelines, and the gas production tree (12) is connected by pipelines to the throttling pipeline (2) and / or the water jacket furnace (4).

3. A wellhead throttling gas transmission system as claimed in claim 1, characterized in that: The throttling pipeline (2) is provided with a throttling valve (21).

4. A wellhead throttling gas transmission system as claimed in claim 3, characterized in that: The throttle valve (21) is a needle-type angle valve.

5. A wellhead throttling gas transmission system as claimed in claim 3, characterized in that: A first valve (22) is provided between the throttle valve (21) and the gas extraction pipeline (1), and the first valve (22) is capable of cutting off the throttle pipeline (2).

6. A wellhead throttling gas transmission system as claimed in claim 5, characterized in that: A second valve (23) is arranged between the throttle valve (21) and the gathering pipeline (3), and the second valve (23) is capable of cutting off the throttling pipeline (2). The first valve (22), the throttle valve (21) and the second valve (23) are arranged in sequence along the airflow direction.

7. A wellhead throttling gas transmission system as claimed in claim 6, characterized in that: The first valve (22) and the second valve (23) are gate valves or stop valves.

8. A wellhead throttling gas transmission system as claimed in claim 6, characterized in that: A third valve (5) is provided between each of the gas production pipelines (1) and the water jacket furnace (4); the third valve (5) is a gate valve or a stop valve; the inlet sides of the first valve (22) and the third valve (5) are connected to a pipeline diversion port (7).

9. A wellhead throttling gas transmission system as claimed in claim 8, characterized in that: A fourth valve (6) is respectively arranged between the water jacket furnace (4) and each of the gathering and transporting pipelines (3); the fourth valve (6) is a gate valve or a stop valve; the third valve (5), the water jacket furnace (4) and the fourth valve (6) are arranged in sequence along the air flow direction; and the outlet sides of the second valve (23) and the fourth valve (6) are connected to the pipeline confluence port (8).

10. A wellhead throttling gas transmission system according to any one of claims 1 to 9, characterized in that: Two, three or four of the gas extraction pipelines (1) are connected in parallel to one of the water jacket furnaces (4).

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