Petroleum gathering and transportation pipeline gas taking device
By installing gas collection pipes and internal pipelines on the oil collection and transmission pipeline, combining oil and gas overflow structures, gas collection chambers, separation pipes and oil-gas gravity separation components, the separation of crude oil and natural gas is achieved and directly supplied to the heating furnace, which solves the problems of high investment costs and limited application of the existing heating methods, reduces construction costs and expands the scope of application.
Patent Information
- Application Number
- CN202311808605.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2025-06-27
AI Technical Summary
During the oil collection and transportation process, the precipitation of substances such as colloids, waxes and asphaltene in crude oil under temperature and pressure, resulting in a decrease or blockage of pipeline diameter, resulting in a decrease or loss of collection and transportation capacity. The existing heating methods are high in investment costs and limited in application.
A gas extraction device for oil collection and transportation pipelines is designed. By installing a gas collection pipe and an internal pipeline on the collection and transportation pipeline, multiple oil and gas overflow structures are set up on the internal pipelines. The gas collection cavity and separation pipe are combined with the oil and gas gravity separation components and a mist network to achieve preliminary and further separation of crude oil and natural gas, and are directly supplied to heating furnaces and other equipment.
It realizes direct gas extraction from the collection and transportation pipeline for use in heating furnaces, avoids the installation of complete sets of separators on site and laying dedicated gas supply pipelines, reduces construction investment costs, and expands the scope of application.
Smart Images
Figure CN120209903A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of oil and gas gathering and transportation equipment, and in particular to a gas extraction device for an oil gathering and transportation pipeline. Background Art
[0002] After crude oil is extracted from the formation to the ground, it needs to be gathered and transported to the processing station through pipelines. During the process of crude oil being extracted from the formation to the ground, due to the decrease in temperature and pressure, substances such as colloid, wax, and asphaltene in the crude oil will precipitate out. The precipitated colloid, wax, and asphaltene will condense on the pipeline wall, resulting in a reduction in the diameter of the gathering and transportation pipeline or blockage of the pipeline, causing a decrease in the pipeline gathering and transportation capacity or a complete loss of the gathering and transportation capacity. The freezing points of crude oils in different reservoirs are different. In some oilfields, pipe freezing may also occur in summer. Especially in northern oilfields during winter production, due to the decrease in temperature, the crude oil is likely to solidify in the pipeline because the temperature is lower than the freezing point, resulting in pipeline blockage due to crude oil solidification.
[0003] Currently, in order to solve the above problems, northern oilfields generally adopt methods such as heating and transporting crude oil or cold production at low temperature. Cold production at low temperature mainly involves adding viscosity reducers, paraffin prevention and removal agents, and asphalt dispersants to the crude oil. The heating methods mainly include electromagnetic heater heating and heating furnace heating, etc.
[0004] However, due to the high price of cold production agents at low temperature, the production cost of crude oil has increased significantly, and their on-site application is not very extensive. Due to the limitation of the load of the power line, the power of the electromagnetic heater is generally not very large, and it is mainly used in oil wells with relatively low production, relatively small gathering and transportation radius, and relatively low gasoline ratio. Heating furnaces are most widely used in northern oilfields and oilfields with relatively high gasoline ratio. Heating furnaces are mainly used in oil wells with relatively high production, relatively large gathering and transportation radius, and relatively high gasoline ratio. Heating furnaces must be supported by a gas supply pipeline. In relatively mature oilfields, gas supply pipelines are built. For oil wells without gas supply pipelines, separators are installed at the wellhead to extract gas from the well to supply gas to the heating furnace. The above methods all have relatively high investment costs and are also limited in on-site application. Summary of the Invention
[0005] The purpose of the present invention is to provide a gas extraction device for an oil gathering and transportation pipeline, which can at least solve the problems of high gas supply investment cost and limited on-site application when using gas supply for heating of crude oil.
[0006] The purpose of the present invention can be achieved through the following technical solutions:
[0007] An oil gathering and transportation pipeline gas extraction device includes a gas collecting pipe for connecting the gathering and transportation pipeline. A gas collecting cavity is formed by the upward bulge in the middle of the gas collecting pipe. An inner pipe for crude oil to pass through is arranged in the gas collecting cavity. A plurality of oil and gas overflow structures are evenly distributed on the inner pipe. The upper part of the gas collecting cavity is used to collect the oil and gas diffused from the oil and gas overflow structures. A separation pipe is connected to the upper part of the gas collecting cavity, and an oil and gas gravity separation component is arranged inside the separation pipe for separating the oil and gas diffused in the gas collecting pipe.
[0008] In a further embodiment, the inner pipe includes an oil transportation channel and a gas collecting groove. One end of the oil transportation channel is closely connected and communicated with one end of the gas collecting pipe, and the other end is closely connected and communicated with the other end of the gas collecting pipe. The upper surface of the oil transportation channel is communicated with the oil and gas overflow structure. The gas collecting groove is connected to the upper surface of the oil transportation channel and covers the oil and gas overflow structure on the upper surface. A plurality of the oil and gas overflow structures are also arranged on the upper surface of the gas collecting groove. There is a constriction at the end of the oil transportation channel close to the outlet end of the gas collecting pipe.
[0009] In a further embodiment, the oil and gas overflow structure includes an opening for overflowing oil and gas.
[0010] In a further embodiment, an inclined first oil baffle is arranged above the gas collecting groove. One end of the first oil baffle is connected to the upper end of the gas collecting cavity and is close to the input end of the inner pipe, and the other end is suspended at the lower end of the gas collecting cavity and is close to the output end of the inner pipe.
[0011] In a further embodiment, there is a ventilation gap between the first oil baffle and the wall of the gas collecting cavity.
[0012] In a further embodiment, the oil and gas gravity separation component includes a plurality of second oil baffles. One ends of the plurality of second oil baffles are spaced and connected to the inner wall of the separation pipe, and the other ends are inclined and suspended in the separation pipe, leaving a gap for oil and gas to pass through between them and the inner wall of the separation pipe. The inclined direction of the other ends faces the input end of the separation pipe, and the plurality of second oil baffles are close to each other at the head and tail.
[0013] In a further embodiment, the oil and gas gravity separation component further includes a mist net arranged in the separation pipe above the plurality of second oil baffles.
[0014] In a further embodiment, the upper end of the separation pipe is in the shape of a bottleneck.
[0015] In a further embodiment, the inner pipe is installed at a part where the crude oil in the gathering and transportation pipeline is easy to flow.
[0016] In a further embodiment, the separation pipe is vertically connected to the gas collecting cavity.
[0017] The beneficial effects of the present invention:
[0018] In the present invention, by installing the gas collecting pipe at a location where crude oil can easily flow, multiple overflow oil and gas structures provided on the inner pipe cause natural gas to rise into the gas collecting cavity. The gas collecting cavity can block some of the oil carried in the natural gas, and then the natural gas rises to the separation pipe and continues to block and separate the oil carried in the natural gas through the oil and gas gravity separation assembly. Finally, the oil carried in the natural gas is further blocked by the mist catching net, and then the gas is supplied to the devices that need gas, such as a heating furnace. In this way, a device that can directly take gas from the gathering and transportation pipeline for use by a heating furnace or other gas-using equipment can be realized, without the need to install a complete set of separators and lay special gas supply pipelines on site, solving the problems of high construction investment cost and limited on-site application.
[0019] Through the arrangement of the gas collecting groove and the gas collecting cavity, the present invention facilitates the preliminary separation of oil and oil and gas and the collection of oil and gas. Through the arrangement of the first oil baffle, the second oil baffle and the mist-like net, it is convenient to further separate the oil and gas, facilitate oil recovery, and form qualified gas supply after the oil and gas are separated. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0021] Figure 1 It is a connection schematic diagram of a gas-taking device for an oil gathering and transportation pipeline in an embodiment of the present invention;
[0022] Figure 2 is Figure 1 a sectional view taken along line A-A in
[0023] In the figure: 1. Gas collecting pipe; 11. Gas collecting cavity; 101. Left eccentric reducer head; 102. Cylinder body; 103. Right eccentric reducer head; 2. Inner pipe; 21. Oil transportation channel; 211. Necking; 22. Gas collecting groove; 3. Overflow oil and gas structure; 4. Separation pipe; 5. Oil and gas gravity separation assembly; 51. Second oil baffle; 52. Mist-like net; 6. First oil baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
[0025] Refer to Figure 1As shown in the figure, an oil gathering and transportation pipeline gas extraction device includes a gas collecting pipe 1. The gas collecting pipe 1 is used to connect to the gathering and transportation pipeline. The middle part of the gas collecting pipe 1 bulges upward to form a gas collecting cavity 11. An inner pipe 2 for crude oil to pass through is arranged in the gas collecting cavity 11. A plurality of oil and gas overflow structures 3 are evenly distributed on the inner pipe 2. The upper part of the gas collecting cavity 11 is used to collect the oil and gas diffused from the oil and gas overflow structures 3. A separation pipe 4 is connected to the upper part of the gas collecting cavity 11. An oil and gas gravity separation component 5 is arranged inside the separation pipe 4 for separating the oil and gas diffused in the gas collecting pipe 1.
[0026] Its working principle or implementation method is that the gas collecting pipe 1 is connected to the part of the gathering and transportation pipeline where crude oil is easy to flow. The crude oil is transported away through the inner pipe 2. During the transportation process, the oil and gas overflow through the oil and gas overflow structures 3 into the gas collecting cavity 11. After being collected by the gas collecting cavity 11, it enters the separation pipe 4. Through the action of the oil and gas gravity separation component 5 in the separation pipe 4, the oil with heavier gravity is separated, and the natural gas can be supplied to the required device.
[0027] According to the above working principle, some preferred embodiments or implementation structures are provided. The inner pipe 2 includes an oil transportation channel 21 and a gas collecting groove 22. One end of the oil transportation channel 21 is hermetically connected and communicated with the inlet end of the gas collecting pipe 1, and the other end is close to the outlet end of the gas collecting pipe 1 with a certain gap. The upper surface of the oil transportation channel 21 is communicated with the oil and gas overflow structure 3. The gas collecting groove 22 is connected to the upper surface of the oil transportation channel 21 and covers the oil and gas overflow structure 3 on the upper surface. A plurality of oil and gas overflow structures 3 are also arranged on the upper surface of the gas collecting groove 22. There is a constriction 211 at the gap where the oil transportation channel 21 of the inner pipe 2 is close to the outlet end of the gas collecting pipe 1. A jet flow effect will be generated at the constriction 211, and the crude oil in the gas collecting cavity 11 is carried by the fluid in the pipeline under the jet suction effect. The oil transportation channel 21 is convenient for docking with the original gathering and transportation pipeline to transport crude oil, and the gas collecting groove 22 can realize the preliminary separation of crude oil. The oil and gas overflow structure 3 includes an opening for overflowing oil and gas.
[0028] Those skilled in the art should be able to think that in addition to the opening structure, the oil and gas overflow structure 3 can also be some special shape structures formed on the basis of the opening structure, such as an opening structure with a corrugated pipe wall.
[0029] An inclined first oil baffle 6 is arranged above the gas collecting groove 22. One end of the first oil baffle 6 is connected to the upper end of the gas collecting cavity 11 and is close to the input end of the inner pipe 2. The other end of the first oil baffle 6 is suspended at the lower end of the gas collecting cavity 11 and is close to the output end of the inner pipe 2. This is convenient for quickly collecting the oil that has fallen after being separated by the separation pipe 4 and the oil and gas gravity separation component 5 in the pipe.
[0030] There is a ventilation gap between the first oil baffle 6 and the wall of the gas collecting cavity 11. This is convenient for the outward diffusion of oil and gas.
[0031] The oil and gas gravity separation assembly 5 includes a plurality of second oil baffle plates 51. One ends of the plurality of second oil baffle plates 51 are spaced and connected to the inner wall of the separation pipe 4, and the other ends are obliquely suspended in the separation pipe 4, leaving a gap for the oil and gas to pass through between the other ends and the inner wall of the separation pipe 4. Except for the gap, the edges of the second baffle plates 51 are in close contact with the inner wall of the separation pipe 4, and the obliquely arranged direction of the other ends faces the input end of the separation pipe 4. The plurality of second oil baffle plates 51 are close to each other at the head and the tail. This facilitates the further separation of the largely diffused oil and gas in the separation pipe 4, and facilitates the oil to fall into the gas collecting cavity 11 and flow and be transported away together with the crude oil in the gas collecting pipe 1.
[0032] The oil and gas gravity separation assembly 5 further includes a mist net 52. The mist net 52 can be made of steel wire material and is arranged in the separation pipe 4 above the plurality of second oil baffle plates 51. The mist net 52 can further dry and separate the oil and gas, and has a strong separation effect. The separated gas can be directly used for gas supply.
[0033] The upper end of the separation pipe 4 is in a bottle mouth shape. The separation pipe 4 in the shape of a bottle mouth facilitates the collection and output of the oil and gas in the separation pipe 4.
[0034] The inner pipe 2 is installed at a location where the crude oil in the gathering pipeline is easy to flow. This can prevent the gas collecting pipe 1 from being blocked, resulting in unsmooth oil transportation and obstructing the normal operation of the gas collecting pipe 1.
[0035] The separation pipe 4 is vertically connected to the gas collecting cavity 11. This facilitates the layout and also facilitates the diffusion of oil and gas and the collection of crude oil.
[0036] Specifically, during use, the gas collecting pipe 1 can be fabricated by welding. For example, the left eccentric reducer head 101 and the right eccentric reducer head 103 are welded to the cylinder body 102 to form a cavity. The cross-sections of the left eccentric reducer head 101 and the right eccentric reducer head 103 are in a plane; the first oil baffle plate 6, the gas collecting groove 22 and the inner pipe 2 are in the cavity formed by the left eccentric reducer head 101, the cylinder body 102 and the right eccentric reducer head 103; the inner diameter of the inner pipe 2 is consistent with the minimum inner diameter of the left eccentric reducer head 101 and the right eccentric reducer head 103; the left side of the inner pipe 2 is welded to the small inner opening of the left eccentric reducer head 101, the upper part of the inner pipe 2 is evenly distributed with small air outlet openings, the other side of the inner pipe 2 has an obvious necking and is inserted into the small inner opening of the right eccentric reducer head 103, the upper part is close to the right eccentric reducer head 103, and there is a certain gap between the lower part and the small opening of the right eccentric reducer head 103; refer to Figure 2 As shown, the gas collecting groove 22 is in a cuboid shape, one long side has no steel plate and is welded to the inner pipe 2, and there is an air outlet on the side of the gas collecting groove 22 away from the inner pipe 2. As Figure 1As shown, the first oil baffle 6 is inclined and installed in the gas collecting chamber 11. The left side is connected to the large diameter of the left eccentric variable diameter head 101, and the right side is close to the right eccentric variable diameter head 103. Moreover, the width of the first oil baffle 6 is greater than the width of the inner pipe 2 and less than the width of the gas collecting chamber 11. The purpose is to reserve a gap for the oil gas to pass through while blocking the liquid to the greatest extent.
[0037] A plurality of second oil baffles 51 are inclined and welded in the separation pipe 4, and a notch is left at the lower end for the gas-liquid to pass through. It should be noted that the inclination directions of the second oil baffles 51 at different upper and lower positions are opposite when welded; the separation pipe 4 is welded on the middle right baffle of the gas collecting pipe 1 in the direction of tilting upward and is installed perpendicular to the upper surface of the gas collecting pipe 1; the ground process flow of the present invention is installed horizontally or obliquely on the gas collecting pipe 1, and the separation pipe 4 is perpendicular to the ground.
[0038] It should be noted that the terms "first", "second", etc. in this application are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so as to implement the embodiments of the present application described here. In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings.
[0039] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.
Claims
1. An air extraction device for an oil gathering and transportation pipeline, characterized in that It includes a gas collecting pipe (1) which is used to connect the gathering pipeline. A gas collecting cavity (11) is formed by the upward bulge in the middle of the gas collecting pipe (1). An inner pipe (2) for the passage of crude oil is arranged in the gas collecting cavity (11). A plurality of oil and gas overflow structures (3) are evenly distributed on the inner pipe (2). The upper part of the gas collecting cavity (11) is used to collect the oil and gas diffused from the oil and gas overflow structures (3). A separation pipe (4) is connected to the upper part of the gas collecting cavity (11). An oil and gas gravity separation component (5) is arranged inside the separation pipe (4) for separating the oil and gas diffused in the gas collecting pipe (1).
2. The gas extraction device for an oil gathering and transportation pipeline according to claim 1, characterized in that, The inner pipe (2) includes an oil transportation channel (21) and a gas collecting groove (22). One end of the oil transportation channel (21) is closely connected and communicated with the inlet end of the gas collecting pipe (1), and the other end is close to the outlet end of the gas collecting pipe (1) with a certain gap. The oil and gas overflow structure (3) is communicated and arranged on the upper surface of the oil transportation channel (21). The gas collecting groove (22) is connected to the upper surface of the oil transportation channel (21) and covers the oil and gas overflow structure (3) on the upper surface. A plurality of the oil and gas overflow structures (3) are also arranged on the upper surface of the gas collecting groove (22). There is a constriction (211) at the end of the oil transportation channel (21) close to the outlet end of the gas collecting pipe (1).
3. The gas extraction device for oil gathering and transportation pipelines according to claim 1 or 2, characterized in that, The oil and gas overflow structure (3) includes an opening for overflowing oil and gas.
4. The gas extraction device for an oil gathering and transportation pipeline according to claim 2, characterized in that, A slanted first oil baffle (6) is arranged above the gas collecting groove (22). One end of the first oil baffle (6) is connected to the upper end of the gas collecting cavity (11) and is close to the input end of the inner pipe (2). The other end of the first oil baffle (6) is suspended at the lower end of the gas collecting cavity (11) and is close to the output end of the inner pipe (2).
5. The gas extraction device for an oil gathering and transportation pipeline according to claim 4, wherein There is a breathable gap between the first oil baffle (6) and the wall of the gas collecting cavity (11).
6. The gas extraction device for an oil gathering and transportation pipeline according to claim 1, characterized in that, The oil and gas gravity separation component (5) includes a plurality of second oil baffles (51). One ends of the plurality of second oil baffles (51) are spaced and connected to the inner wall of the separation pipe (4), and the other ends are obliquely suspended in the separation pipe (4), leaving a gap for the passage of oil and gas between them and the inner wall of the separation pipe (4). The oblique direction of the other ends faces the input end of the separation pipe (4). The heads and tails of the plurality of second oil baffles (51) are respectively close to each other.
7. The gas extraction device for an oil gathering and transportation pipeline according to claim 6, characterized in that, The oil and gas gravity separation component (5) further includes a fog-like net (52). The fog-like net (52) is arranged in the separation pipe (4) above the plurality of second oil baffles (51).
8. The gas extraction device for an oil gathering and transportation pipeline according to claim 1, characterized in that, The upper end of the separation pipe (4) is in the shape of a bottle mouth.
9. The gas extraction device for oil gathering and transportation pipelines according to claim 1, characterized in that, The inner pipe (2) is installed at a position where the crude oil in the gathering pipeline can easily flow through.
10. The gas extraction device for an oil gathering and transportation pipeline according to claim 1, characterized in that, The separation pipe (4) is vertically connected to the gas collecting cavity (11).