Multi-well short-distance stringing gas gathering device for oil and gas field

Abstract

The utility model is suitable for the technical field of gas collecting device, provide oil and gas field multi -well short distance series connection gas collecting device, include: gas collecting support, gas production main pipe, gas production main pipe fixed connection is in the upper surface of gas collecting support, wellhead series connection mechanism, the at least two above oil and gas field well of being close to are through single well main pipe and gas production pipe and the series connection of collecting pipe together form pipe network, the collecting pipe transports the natural gas after gathering to gas production main pipe, finally through compressor delivery to gas gathering station, the device passes through series connection mode, the traditional single well independent collection and transportation pipeline is optimized as regional collecting main, the overall length of collection and transportation pipe network is greatly shortened, especially suitable for the area that well site distribution is dense, land resource is short of or environment is sensitive, and cooperate alcohol injection pipe and meter, alcohol type inhibitor is injected into gas production pipe through the alcohol injection pipe, mixes with fluid, effectively inhibits the hydrate generation, fundamentally prevents the pipeline ice blocking phenomenon.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas gathering devices, and particularly relates to a gas gathering device for short-distance series connection of multiple wells in oil and gas fields. Background Technology

[0002] With the continuous growth of global energy demand, the exploration and development of oil and gas resources are becoming increasingly complex, deeper, and less permeable. In the process of developing oil and gas fields, especially for gas fields or oil fields with abundant associated gas, how to efficiently, economically, and safely collect the natural gas produced by each oil and gas well is one of the key aspects of the entire surface engineering construction.

[0003] A Chinese patent discloses a multi-well short-distance series gas gathering device for oil and gas fields, publication number CN201013321Y. The paper states that it "includes gas wells, wellhead devices (1), pipelines, and gas gathering stations (5). The gas wells are connected to the wellhead devices (1), and adjacent gas wellhead devices are connected to form a pipeline network. The pipeline network is connected to the gas production trunk line (4), and the gas production trunk line (4) is connected to the gas gathering station (5) manifold. This multi-well short-distance series gas gathering device for oil and gas fields reduces equipment, lowers costs, and facilitates management and production."

[0004] However, the above schemes inevitably encounter practical problems during the extraction and transportation of natural gas. In cold regions or after throttling and depressurization, the moisture in natural gas is very likely to form ice hydrates, leading to pipeline freezing and blockage. The prior art does not have any preventive or treatment measures for this. Therefore, it is necessary to design a multi-well short-distance gas gathering device for oil and gas fields. Utility Model Content

[0005] This utility model provides a multi-well short-distance series gas gathering device for oil and gas fields, which aims to solve the problem that some current detection devices are inconvenient to quickly replace the sealing rubber gaskets.

[0006] This utility model is implemented as follows: a multi-well short-distance series gas gathering device for oil and gas fields, comprising:

[0007] Gas collection support;

[0008] Gas collection main pipe; the gas collection main pipe is fixedly connected to the upper surface of the gas collection support;

[0009] Wellhead series connection mechanism; the wellhead series connection mechanism is set in front of the gas production trunk pipe, the wellhead series connection mechanism includes a single well trunk pipe, a gas production pipe, a shut-off valve, an alcohol injection pipe, a metering device, and a manifold. The manifold is set in front of the gas production trunk pipe, and multiple gas production pipes are distributed laterally in front of the manifold. Each gas production pipe is connected to a single well trunk pipe in front of it through a flange. Each single well trunk pipe is connected to the wellhead of the corresponding oil and gas field.

[0010] Preferably, each of the gas sampling pipes is provided with a shut-off valve on its upper surface.

[0011] Preferably, each of the gas sampling pipes is connected to an alcohol injection pipe on the outer side of its front end, and a meter is provided on one side of the alcohol injection pipe.

[0012] Preferably, a water-gas pipe is fixedly connected to the upper surface of the gas extraction main pipe, and a vortex diverter is provided on the upper surface of the water-gas pipe.

[0013] Preferably, the upper surface of the cyclone splitter is connected to a manifold at the inlet end.

[0014] Preferably, an exhaust port is provided on one side of the cyclone splitter, and an exhaust pipe is fixedly connected to the exhaust port.

[0015] Preferably, the end of the exhaust pipe furthest from the exhaust port is connected to the front side of the gas intake main pipe.

[0016] Preferably, a compressor is provided on the lower surface of the gas sampling main pipe, the air inlet of the compressor is connected to the gas sampling main pipe, and the air outlet of the compressor is connected to a guide pipe.

[0017] Compared with related technologies, the multi-well short-distance series gas gathering device for oil and gas fields provided by this utility model has the following beneficial effects:

[0018] 1. By setting up a wellhead series connection mechanism, at least two adjacent oil and gas field wells are connected in series through single-well trunk pipes, gas production pipes, and manifolds to form a pipeline network. The manifold transports the collected natural gas to the gas production trunk pipe, and finally to the gas gathering station through a compressor. This device optimizes the traditional single-well independent gathering and transportation pipeline into a regional manifold trunk line through the series connection mode, which significantly shortens the overall length of the gathering and transportation pipeline network, thereby significantly reducing the direct investment costs of pipe materials, corrosion protection, insulation, and construction and installation. It is particularly suitable for areas with dense well distribution, scarce land resources, or environmental sensitivity. In addition, with the alcohol injection pipe and metering device, alcohol inhibitors (such as methanol) are injected into the gas production pipe through the alcohol injection pipe, mix with the fluid, effectively inhibit the formation of hydrates, and fundamentally prevent pipeline ice blockage.

[0019] 2. Through the installed cyclone separator, natural gas from each wellhead is collected into the manifold and enters the upper surface inlet of the cyclone separator. Due to the different densities of water and gas, during the cyclone process, the denser water is thrown to the inner wall of the cyclone separator and flows along the inner wall to the drain outlet, and finally exits the device. The separated gas flows out from the central area of ​​the cyclone separator and enters the gas production trunk line for continued transportation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the left side of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the right side of this utility model;

[0022] Figure 3 This is a schematic diagram of the rear three-dimensional structure of the present invention;

[0023] Figure 4 For the present utility model Figure 3 A magnified view of A in the middle.

[0024] In the diagram: 1. Gas gathering support; 2. Gas production main pipe; 3. Water-gas pipe; 4. Wellhead series connection mechanism; 401. Single well main pipe; 402. Gas production pipe; 403. Shut-off valve; 404. Methanol injection pipe; 405. Meter; 406. Manifold; 5. Swirl splitter; 6. Exhaust port; 7. Exhaust pipe; 8. Compressor; 9. Gas guide pipe. Detailed Implementation

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] Example 1

[0028] A preferred embodiment of the oil and gas field multi-well short-distance series gas gathering device provided by this utility model is, for example... Figures 1 to 4 As shown: A multi-well short-distance series gas gathering device for oil and gas fields, including:

[0029] Gas collection bracket 1;

[0030] Gas collection main pipe 2; Gas collection main pipe 2 is fixedly connected to the upper surface of gas collection support 1;

[0031] Wellhead series connection mechanism 4; The wellhead series connection mechanism 4 is located on the front side of the gas production trunk pipe 2. The wellhead series connection mechanism 4 includes a single well trunk pipe 401, a gas production pipe 402, a shut-off valve 403, an alcohol injection pipe 404, a meter 405, and a manifold 406. The manifold 406 is located on the front side of the gas production trunk pipe 2. Multiple gas production pipes 402 are distributed laterally on the front side of the manifold 406. The front side of each gas production pipe 402 is connected to the single well trunk pipe 401 through a flange. Each single well trunk pipe 401 is connected to the wellhead of the corresponding oil and gas field. A shut-off valve 403 is installed on the upper surface of each gas production pipe 402. An alcohol injection pipe 404 is connected to the outer side of the front end of each gas production pipe 402. A meter 405 is installed on one side of the alcohol injection pipe 404.

[0032] It should be noted that some existing multi-well short-distance gas gathering devices in oil and gas fields still have certain shortcomings in actual use. In the comparison documents, during the use of natural gas, there are practical problems that will inevitably be encountered in the process of extraction and transportation. In cold regions or after throttling and pressure reduction, the moisture in natural gas is very likely to form ice hydrates, which can lead to pipeline freezing and blockage.

[0033] In this embodiment, at least two adjacent oil and gas wells are connected in series through a single well trunk pipe 401, a gas production pipe 402, and a manifold pipe 406 to form a pipeline network. The manifold pipe 406 transports the collected natural gas to the gas production trunk pipe 2, and finally to the gas gathering station through the compressor 8.

[0034] In a further preferred embodiment of the present invention, a water-gas pipe 3 is fixedly connected to the upper surface of the gas sampling main pipe 2, and a vortex diverter 5 is provided on the upper surface of the water-gas pipe 3.

[0035] In this embodiment, the specific model of the cyclone splitter 5 is SLG-50 / 0.8.

[0036] Example 2

[0037] Based on Example 1, a preferred embodiment of the oil and gas field multi-well short-distance series gas gathering device provided by this utility model is, for example... Figures 1 to 4 As shown:

[0038] In a further preferred embodiment of the present invention, a manifold 406 is connected to the upper surface inlet end of the cyclone splitter 5.

[0039] In this embodiment, natural gas from each wellhead is collected into the manifold 406 and enters the upper surface inlet of the vortex splitter 5.

[0040] In a further preferred embodiment of the present invention, an exhaust port 6 is provided on one side of the cyclone splitter 5, and an exhaust pipe 7 is fixedly connected to the exhaust port 6.

[0041] In this embodiment, due to the different densities of water and gas, during the swirling process, the denser water is thrown against the inner wall of the swirling distributor 5 and flows along the inner wall to the drain outlet, eventually exiting the device. The separated gas flows out from the central area of ​​the swirling distributor 5 and enters the gas collection main pipe 2 for continued transportation.

[0042] In a further preferred embodiment of the present invention, the end of the exhaust pipe 7 away from the exhaust port 6 is connected to the front side of the gas collection main pipe 2.

[0043] In this embodiment, the exhaust pipe 7 guides the separated dry natural gas into the gas extraction trunk 2 for storage.

[0044] In a further preferred embodiment of the present invention, a compressor 8 is provided on the lower surface of the gas sampling main pipe 2, the inlet end of the compressor 8 is connected to the gas sampling main pipe 2, and the outlet end of the compressor 8 is connected to a gas guide pipe 9.

[0045] In this embodiment, when the natural gas pressure in the gas extraction main pipe 2 is insufficient to meet the external transmission requirements, the compressor 8 is started to pressurize the gas in the gas extraction main pipe 2, and the pressurized gas is transported to the gas gathering station through the gas guide pipe 9.

[0046] In summary, by using a series connection method, the traditional single-well independent gathering and transportation pipeline is optimized into a regional convergence trunk line, which significantly shortens the overall length of the gathering and transportation network. This results in a significant reduction in direct investment costs for pipe materials, corrosion protection, insulation, and construction and installation. It is particularly suitable for areas with dense well sites, limited land resources, or environmentally sensitive environments.

[0047] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0048] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0049] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A multi-well short-distance series gas gathering device for oil and gas fields, characterized in that, include: Gas collection support (1); Gas collection main pipe (2); the gas collection main pipe (2) is fixedly connected to the upper surface of the gas collection support (1); Wellhead series connection mechanism (4); The wellhead series connection mechanism (4) is set on the front side of the gas production trunk pipe (2). The wellhead series connection mechanism (4) includes a single well trunk pipe (401), a gas production pipe (402), a shut-off valve (403), an alcohol injection pipe (404), a meter (405), and a manifold (406). The manifold (406) is set on the front side of the gas production trunk pipe (2). Multiple gas production pipes (402) are distributed laterally on the front side of the manifold (406). Each gas production pipe (402) is connected to a single well trunk pipe (401) through a flange on the front side. Each single well trunk pipe (401) is connected to the corresponding oil and gas field wellhead.

2. The oil and gas field multi-well short-distance series gas gathering device as described in claim 1, characterized in that, Each of the gas sampling pipes (402) is provided with a shut-off valve (403) on its upper surface.

3. The oil and gas field multi-well short-distance series gas gathering device as described in claim 1, characterized in that, Each of the gas sampling pipes (402) is connected to an alcohol injection pipe (404) on the outer side of its front end, and a meter (405) is provided on one side of the alcohol injection pipe (404).

4. The oil and gas field multi-well short-distance series gas gathering device as described in claim 1, characterized in that, A water-gas pipe (3) is fixedly connected to the upper surface of the gas extraction main pipe (2), and a vortex diverter (5) is provided on the upper surface of the water-gas pipe (3).

5. The oil and gas field multi-well short-distance series gas gathering device as described in claim 4, characterized in that, The upper surface of the cyclone splitter (5) is connected to a manifold (406).

6. The oil and gas field multi-well short-distance series gas gathering device as described in claim 4, characterized in that, An exhaust port (6) is provided on one side of the cyclone splitter (5), and an exhaust pipe (7) is fixedly connected to the exhaust port (6).

7. The oil and gas field multi-well short-distance series gas gathering device as described in claim 6, characterized in that, The end of the exhaust pipe (7) away from the exhaust port (6) is connected to the front side of the gas collection main pipe (2).

8. The multi-well short-distance series gas gathering device for oil and gas fields as described in claim 1, characterized in that, A compressor (8) is provided on the lower surface of the gas collection main pipe (2). The inlet end of the compressor (8) is connected to the gas collection main pipe (2), and the outlet end of the compressor (8) is connected to the gas guide pipe (9).

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