An oil and gas separation device for oil exploitation

Abstract

The present invention relates to the technical field of oil and gas separation, and discloses an oil and gas separation device for oil extraction, which includes a tank body. The tank body is provided with at least an oil and gas inlet, a natural gas outlet, and an oil drain port. The oil and gas inlet and the natural gas outlet are located on the upper side of the tank body, and the oil drain port is located on the lower side of the tank body. A sleeve is installed on the oil and gas inlet, and an oil and gas inlet component is installed in the cavity formed by the oil and gas inlet and the sleeve. The oil and gas inlet component forms a curved channel in the cavity. A water inlet pipe communicating with the inlet end of the curved channel and a water outlet pipe communicating with the outlet end of the curved channel are provided on the outer side of the sleeve. In the present invention, the curved channel formed by the oil and gas inlet component in the cavity is communicated with the water inlet pipe and the water outlet pipe. After the water passes through the oil and gas inlet component, the oil passing through is cooled. After cooling, the solubility of the gas in the liquid decreases, which helps to separate gases such as natural gas dissolved in the crude oil, and improves the efficiency and effect of oil and gas separation.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas separation, and particularly to an oil and gas separation device for oil extraction. Background Technique

[0002] Oil extraction refers to the act of excavating and extracting oil in places where oil is stored. During the oil extraction process, the crude oil produced from the oil well and the associated natural gas are separated.

[0003] Oil and gas separation utilizes the different densities and gravitational forces of gases and liquids for gas-liquid separation. When the gas-liquid mixture enters the separator, the liquid is subjected to a greater gravitational force and moves downward, while the gas is relatively lighter and moves upward under the action of pressure. During the upward movement of the gas, small liquid droplets collide and move downward under the action of gravity into the liquid accumulation area, achieving the separation of the gas-liquid two phases.

[0004] However, during the oil extraction process, heat is generated due to the high-speed rotation of the drill bit underground and the friction between the drill pipe and the well wall. Especially in the extraction of deep wells and ultra-deep wells, due to the long-term operation and high-load work of the drilling tools, the phenomenon of heat generation by friction is more obvious, which may lead to a local temperature increase. In a high-temperature environment, the solubility of gas in liquid increases, which is not conducive to separating gases such as natural gas dissolved in the crude oil, and cannot improve the efficiency and effect of oil and gas separation. Summary of the Invention

[0005] The purpose of the present invention is to provide an oil and gas separation device for oil extraction to solve the problems raised in the above background technique.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0007] The present invention is an oil and gas separation device for oil extraction, including a tank body. Two groups of support legs are evenly installed at the bottom of the tank body. At least an oil and gas inlet, a natural gas outlet, and an oil drain port are provided on the tank body. The oil and gas inlet and the natural gas outlet are located on the upper side of the tank body, and the oil drain port is located on the lower side of the tank body. A sleeve is installed on the oil and gas inlet. An oil and gas inlet assembly is installed in the cavity formed by the oil and gas inlet and the sleeve. The oil and gas inlet assembly forms a curved channel in the cavity. A water inlet pipe communicating with the inlet end of the curved channel and a water outlet pipe communicating with the outlet end of the curved channel are provided on the outer side of the sleeve;

[0008] The filtration separator separates the crude oil and associated natural gas produced from oil wells. Since oil is usually stored deep underground, the temperature gradually increases as the formation depth increases. Generally, for every 100-meter increase in formation depth, the temperature rises by about 3°C. In some deep reservoirs, the temperature may reach over 100°C. Additionally, during the oil extraction process, heat is generated by the high-speed rotation of the drill bit underground and the friction between the drill pipe and the wellbore wall. Especially in the exploitation of deep wells and ultra-deep wells, due to the long-term operation and high-load work of the drilling tools, the phenomenon of heat generation by friction is more obvious, which may lead to a local temperature increase.

[0009] In a high-temperature environment, it is easy to cause the volatilization of oil and gas. As a result, in a high-temperature environment, the density of the gas increases. Since the tank itself is in a high-pressure state, the inside of the tank is in an ultra-high-pressure state. Under ultra-high pressure, it is easy to shorten the service life of the seal.

[0010] In this application, the oil that needs to be separated from oil and gas is connected to the oil and gas inlet through a pipeline, so as to be transported to the inside of the tank. Utilizing the density difference between gas and liquid, separation is achieved under the action of gravity. The density of gas is much smaller than that of liquid. When the oil and gas mixture enters the separator, the liquid sinks to the bottom of the separator due to gravity, and the gas rises to the top, thus achieving preliminary separation. The separated gas is discharged through the natural gas outlet, and the settled oil is discharged through the oil outlet.

[0011] The oil flows downward through the oil and gas inlet component. Since the curved channels formed by the oil and gas inlet component in the cavity are connected to the water inlet pipe and the water outlet pipe, after the water passes through the oil and gas inlet component, the oil passing through is cooled. After cooling, the solubility of gas in the liquid decreases, which helps to separate the gas such as natural gas dissolved in the crude oil, improving the efficiency and effect of oil and gas separation. Additionally, cooling can cause some components in the oil and gas mixture to undergo phase changes, such as from gaseous to liquid state, which is convenient for gravity sedimentation.

[0012] Furthermore, the tank is an integrally welded structure, and a maintenance opening is provided on the upper side of the tank. The integrally structured tank reduces the splicing seams, improves the overall pressure-bearing capacity of the tank, and thus improves the sealing effect in a high-pressure environment.

[0013] Furthermore, a sewage outlet is provided on the lower side of the tank. The sewage outlet corresponds to the oil and gas inlet, the oil outlet corresponds to the natural gas outlet. Several anti-wave plates and an overflow partition are provided at the bottom end of the inner wall of the tank. The anti-wave plates and the overflow partition are both located between the sewage outlet and the oil outlet. The several anti-wave plates and the one overflow partition are equally spaced, and the overflow partition is located on the side close to the oil outlet.

[0014] Furthermore, a gap is provided between the lower side edge of the wave baffle and the inner wall of the tank body. Meanwhile, a slope is provided on the inner wall of the tank body, and the slope is located below the wave baffle. The lower end of the slope is close to the sewage outlet, and a drain outlet is provided on the lower side of the tank body, and the drain outlet is close to the upper end of the slope.

[0015] By providing the wave baffle, the surging of the falling oil towards one side of the overflow baffle is reduced, so that the oil near the overflow baffle is relatively calm, facilitating the separation of water and impurities in the oil.

[0016] By providing the slope, the settled impurities are prevented from moving towards one side of the overflow baffle. During the sewage discharge process, the flowing liquid drives the impurities on the slope to be discharged towards the sewage outlet side.

[0017] In addition, a liquid level detection port and a temperature detection port are provided on the outer side surface of the tank body. Among them, at least two liquid level detection ports are provided in an up-and-down distribution. By connecting a communication pipeline, it is convenient to observe the liquid level situation inside the tank body; a temperature detection table is installed on the temperature detection port.

[0018] Furthermore, the oil and gas inlet assembly includes a heat exchange member. The heat exchange member has a curved channel. The upper end of the heat exchange member is connected to a pipe body. A connection seat is provided inside the port of the pipe body, and a connecting rod is installed inside the connection seat. The other end of the connecting rod is sleeved with a horn-shaped shell, a spring, and a nut located at the lower end of the heat exchange member. The spring pushes the horn-shaped shell to closely adhere to the end of the heat exchange member.

[0019] Furthermore, the heat exchange member is of a cylindrical structure. The heat exchange member includes an inner ring body and an outer ring body located outside the inner ring body. A plurality of vertically arranged plates are annularly distributed on the outside of the inner ring body. The vertically arranged plates penetrate through the outer ring body. A first annular groove is formed between the inner ring body and the outer ring body. A second annular groove is formed between the outer ring body and the inner wall of the sleeve and the inner wall of the oil and gas inlet. The top ends of the first annular groove and the second annular groove are separated by an annular plate body. The bottom ends of the first annular groove and the second annular groove are communicated with each other. The first annular groove is communicated with the water inlet pipe, and the second annular groove is communicated with the water outlet pipe.

[0020] A ring seat is sleeved outside the plurality of vertically arranged plates distributed annularly, and the ring seat is installed at the connection of the sleeve and the oil and gas inlet.

[0021] Furthermore, the spring pushes the horn-shaped shell to close the bottom end of the inner ring body.

[0022] External water enters the first annular groove formed between the inner ring body and the outer ring body through the water inlet pipe, enters the second annular groove through the bottom of the first annular groove, and is discharged through the water outlet pipe communicated with the top end of the second annular groove, thereby realizing that the water flows through the whole heat exchange member to cool the heat exchange member.

[0023] The heat exchange component is made of heat-conducting metal, which can be any one or more of copper, aluminum or iron. The petroleum moves downward inside the inner ring body, pushing the horn-shaped shell to squeeze the spring to realize the internal communication between the inner ring body and the tank body. Then the petroleum enters the inside of the tank body, and the entered petroleum diffuses outward along the surface of the horn-shaped shell;

[0024] In addition, an outer ring body is arranged outside the inner ring body to increase the contact area between the heat exchange component and water and improve the heat exchange effect;

[0025] A convex ring is sleeved on the inner ring body. The convex ring is connected to the outer wall of the inner ring body through a bracket, and the convex ring cooperates with the annular groove provided on the inner side surface of the sleeve shell, so as to realize the limit installation.

[0026] Furthermore, a guide plate and several gas baffles are installed at the top end of the inner wall of the tank body. The guide plate and the gas baffles are both located between the oil and gas inlet and the natural gas outlet. The guide plate is correspondingly distributed with the oil and gas inlet, and several through grooves are opened on the vertical side surfaces of the guide plate and the gas baffles.

[0027] Furthermore, a mist eliminator is installed inside the tank body, and the mist eliminator is communicated with the lower port of the natural gas outlet.

[0028] The gas baffle and the mist eliminator are used to separate the oil droplets with a particle size less than 100 microns that have not settled by gravity in the air flow. The oil droplets are collected in the mist eliminator mainly by collision and coagulation, and then flow into the liquid collection area under the action of gravity, so as to improve the efficiency and purity of oil and gas separation;

[0029] The mist eliminator can effectively prevent oil droplets from entering subsequent equipment and pipelines, avoid the deposition, scaling or corrosion of oil droplets in these parts, extend the service life of the equipment, and reduce the maintenance cost.

[0030] The present invention has the following beneficial effects:

[0031] (1) In the present invention, the petroleum that needs to be separated from oil and gas is connected to the oil and gas inlet through a pipeline, so as to be transported into the inside of the tank body. By using the density difference between gas and liquid, separation is realized under the action of gravity. The density of gas is much smaller than that of liquid. When the oil and gas mixture enters the separator, the liquid sinks to the bottom of the separator due to gravity, and the gas rises to the top. Separation is realized under the action of density by gravity, reducing the use of power energy and energy consumption, so as to realize low-carbon separation of oil and gas, and thus realize preliminary separation. The separated gas is discharged through the natural gas outlet, and the settled petroleum is discharged through the oil drain port;

[0032] The oil flows downward through the oil-gas inlet component. Since the curved channels formed by the oil-gas inlet component in the cavity are connected to the water inlet pipe and the water outlet pipe, after the water passes through the oil-gas inlet component, the oil passing through is cooled. After cooling, the solubility of gas in the liquid decreases, which helps to separate gases such as natural gas dissolved in the crude oil, improving the efficiency and effect of oil-gas separation. Additionally, cooling can cause phase changes in some components of the oil-gas mixture, such as from gaseous to liquid state, facilitating gravity sedimentation.

[0033] (2) The anti-wave plate provided in the present invention reduces the surging of the falling oil towards one side of the overflow baffle, thereby achieving relative calmness of the oil near the overflow baffle side, which facilitates the separation of water and impurities in the oil.

[0034] The slope provided avoids the movement of the settled impurities towards one side of the overflow baffle. During the sewage discharge process, the flowing liquid drives the impurities on the slope towards the sewage outlet side for discharge.

[0035] (3) The gas baffle and mist eliminator in the present invention are used to separate the oil droplets that have not settled by gravity in the air flow. The oil droplets are collected in the mist eliminator mainly by collision and coagulation, and then flow into the liquid collection area under the action of gravity, thereby improving the efficiency and purity of oil-gas separation.

[0036] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. Brief Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only 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.

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0040] Figure 3 It is a schematic side view of the present invention;

[0041] Figure 4 It is the present invention Figure 3 of the A-A cross-sectional view;

[0042] Figure 5 It is a schematic diagram of the oil-gas inlet component of the present invention;

[0043] Figure 6 It is a schematic cross-sectional view of the oil-gas inlet component of the present invention;

[0044] Figure 7 Schematic diagram of the decomposition of the oil and gas inlet component of the present invention;

[0045] Figure 8 Schematic diagram of the overall height increase of the present invention;

[0046] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0047] In the figure: 1, tank body; 101, oil and gas inlet; 102, natural gas outlet; 103, maintenance opening; 104, sewage outlet; 105, oil drain port; 106, liquid level detection port; 107, temperature detection port; 108, slope; 109, drain port; 2, support leg; 3, guide plate; 4, wave baffle; 5, overflow partition; 6, gas baffle; 7, oil and gas inlet component; 701, heat exchanger; 7011, inner ring body; 7012, outer ring body; 7013, vertical plate; 7014, ring seat; 7015, convex ring; 7016, annular plate body; 702, pipe body; 7021, connecting seat; 703, connecting rod; 704, flared shell; 705, spring; 706, nut; 8, housing; 801, water inlet pipe; 802, water outlet pipe; 9, mist eliminator; 10, filter element. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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 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 shall fall within the protection scope of the present invention.

[0049] Please refer to Figures 1-8 As shown, the present invention is an oil and gas separation device for oil exploitation, including a tank body 1. Two groups of support legs 2 are evenly installed at the bottom of the tank body 1. Heightening blocks can be installed at the bottom of the support legs 2 to change the installation height of the tank body 1 by installing the heightening blocks. The tank body 1 is provided with at least an oil and gas inlet 101, a natural gas outlet 102 and an oil drain port 105. A tubular filter element 10 is inserted at the inlet end of the oil drain port 105 to filter the discharged oil, and it is drawn out through the oil drain port 105 during replacement;

[0050] The oil and gas inlet 101 and the natural gas outlet 102 are located on the upper side of the tank body 1, and the oil drain port 105 is located on the lower side of the tank body 1. A housing 8 is installed on the oil and gas inlet 101. An oil and gas inlet component 7 is installed in the cavity formed by the oil and gas inlet 101 and the housing 8. The oil and gas inlet component 7 forms a curved channel in the cavity. A water inlet pipe 801 communicating with the inlet end of the curved channel and a water outlet pipe 802 communicating with the outlet end of the curved channel are provided on the outer side of the housing 8;

[0051] A filtration separator separates the crude oil produced from oil wells and the associated natural gas. Since oil is usually stored deep underground, the temperature gradually increases as the formation depth increases. Generally, for every 100-meter increase in formation depth, the temperature rises by about 3°C. In some deep reservoirs, the temperature may reach over 100°C; in addition, during the oil extraction process, heat is generated by the high-speed rotation of the drill bit underground and the friction between the drill pipe and the wellbore wall. Especially in the exploitation of deep wells and ultra-deep wells, due to the long-term operation and high-load work of the drilling tools, the phenomenon of heat generation by friction is more obvious, which may lead to a local temperature increase.

[0052] In a high-temperature environment, it is easy to cause the volatilization of oil and gas. Thus, in a high-temperature environment, the density of the gas increases. Since the tank body 1 itself is in a high-pressure state, the inside of the tank body 1 is in a super-high-pressure state. Under super-high pressure, it is easy to shorten the service life of the seal.

[0053] In this application, the oil that needs to be separated from oil and gas is connected to the oil and gas inlet 101 through a pipeline, so as to be transported into the inside of the tank body 1. Utilizing the density difference between gas and liquid, separation is achieved under the action of gravity. The gas density is much smaller than that of the liquid. When the oil and gas mixture enters the separator, the liquid sinks to the bottom of the separator due to gravity, and the gas rises to the top, thus achieving preliminary separation. The separated gas is discharged through the natural gas outlet 102, and the settled oil is discharged through the oil drain port 105.

[0054] The oil flows downward through the oil and gas inlet assembly 7. Since the curved channels formed by the oil and gas inlet assembly 7 in the cavity are connected to the water inlet pipe 801 and the water outlet pipe 802, after the water passes through the oil and gas inlet assembly 7, the oil passing through is cooled. After cooling, the solubility of gas in the liquid decreases, which helps to separate gases such as natural gas dissolved in the crude oil, improving the efficiency and effect of oil and gas separation; in addition, cooling can cause phase changes in some components of the oil and gas mixture, such as changing from gaseous state to liquid state, which is convenient for gravity sedimentation.

[0055] The tank body 1 is an integrally welded structure. An inspection port 103 is provided on the upper side of the tank body 1. The tank body 1 being an integral structure reduces the splicing seams, improves the overall pressure-bearing capacity of the tank body 1, and thus improves the sealing effect in a high-pressure environment.

[0056] A sewage discharge port 104 is provided on the lower side of the tank body 1. The sewage discharge port 104 corresponds to the oil and gas inlet 101, and the oil drain port 105 corresponds to the natural gas outlet 102. Several anti-wave plates 4 and an overflow partition 5 are provided at the bottom end of the inner wall of the tank body 1. The anti-wave plates 4 and the overflow partition 5 are both located between the sewage discharge port 104 and the oil drain port 105. The several anti-wave plates 4 and the one overflow partition 5 are equally spaced, and the overflow partition 5 is located on the side close to the oil drain port 105.

[0057] There is a gap between the lower side edge of the wave baffle 4 and the inner wall of the tank body 1. At the same time, there is a slope 108 on the inner wall of the tank body 1. The slope 108 is located below the wave baffle 4. The lower end of the slope 108 is close to the sewage outlet 104. A drain port 109 is provided on the lower side of the tank body 1, and the drain port 109 is close to the upper end of the slope 108.

[0058] By providing the wave baffle 4, the surging of the falling oil to one side of the overflow partition 5 is reduced, so that the oil on the side close to the overflow partition 5 is relatively calm, which is convenient for separating the water and impurities in the oil.

[0059] By providing the slope 108, the settled impurities are prevented from moving to one side of the overflow partition 5. During the sewage discharge process, the flowing liquid drives the impurities on the slope 108 to be discharged to the sewage outlet 104 side.

[0060] In addition, a liquid level detection port 106 and a temperature detection port 107 are provided on the outer side surface of the tank body 1. Among them, there are at least two liquid level detection ports 106 distributed vertically. By connecting a communication pipeline, it is convenient to observe the liquid level situation inside the tank body 1; a temperature detection meter is installed on the temperature detection port 107.

[0061] The oil and gas inlet component 7 includes a heat exchange part 701. The heat exchange part 701 has a curved channel. The upper end of the heat exchange part 701 is connected with a pipe body 702. A connection seat 7021 is provided inside the port of the pipe body 702. A connecting rod 703 is installed inside the connection seat 7021. The other end of the connecting rod 703 is sleeved with a horn-shaped shell 704, a spring 705 and a nut 706 located at the lower end of the heat exchange part 701. The spring 705 pushes the horn-shaped shell 704 to tightly adhere to the end of the heat exchange part 701.

[0062] The heat exchange part 701 is of a cylindrical structure. The heat exchange part 701 includes an inner ring body 7011 and an outer ring body 7012 located outside the inner ring body 7011. A plurality of vertically distributed vertical plates 7013 are provided outside the inner ring body 7011. The vertical plates 7013 pass through the outer ring body 7012. A first annular groove is formed between the inner ring body 7011 and the outer ring body 7012. A second annular groove is formed between the outer ring body 7012 and the inner wall of the sleeve 8 and the inner wall of the oil and gas inlet 101. The top ends between the first annular groove and the second annular groove are separated by an annular plate body 7016. The bottom ends of the first annular groove and the second annular groove are communicated with each other. The first annular groove is communicated with the water inlet pipe 801, and the second annular groove is communicated with the water outlet pipe 802.

[0063] A ring seat 7014 is sleeved outside a plurality of vertically distributed vertical plates 7013, and the ring seat 7014 is installed at the connection part of the sleeve 8 and the oil and gas inlet 101.

[0064] The spring 705 pushes the horn-shaped shell 704 to close the bottom end of the inner ring body 7011.

[0065] External water enters the first annular groove formed by the inner annular body 7011 and the outer annular body 7012 through the water inlet pipe 801, enters the second annular groove through the bottom of the first annular groove, and is discharged through the water outlet pipe 802 connected to the top of the second annular groove, thereby enabling the water flow to pass through the entire heat exchange element 701 and cooling the heat exchange element 701;

[0066] The heat exchange element 701 is made of heat-conducting metal, which can be any one or more of copper, aluminum, or iron. The petroleum moves downward inside the inner annular body 7011, pushing the horn-shaped housing 704 to squeeze the spring 705 to achieve the internal communication between the inner annular body 7011 and the inside of the tank body 1. Then the petroleum enters the inside of the tank body 1, and the entered petroleum diffuses outward along the surface of the horn-shaped housing 704;

[0067] In addition, an outer annular body 7012 is provided on the outer side of the inner annular body 7011 to increase the contact area between the heat exchange element 701 and water and improve the heat exchange effect;

[0068] A convex ring 7015 is sleeved on the inner annular body 7011. The convex ring 7015 is connected to the outer wall of the inner annular body 7011 through a bracket, and the convex ring 7015 cooperates with the annular groove provided on the inner side surface of the sleeve housing 8, thereby realizing the limit installation.

[0069] At the top end of the inner wall of the tank body 1, a guide plate 3 and several gas baffles 6 are installed. The guide plate 3 and the gas baffles 6 are both located between the oil and gas inlet 101 and the natural gas outlet 102. The guide plate 3 is correspondingly distributed with the oil and gas inlet 101, and several through grooves are opened on the vertical side surfaces of the guide plate 3 and the gas baffles 6.

[0070] A mist eliminator 9 is installed inside the tank body 1, and the mist eliminator 9 is communicated with the lower port of the natural gas outlet 102.

[0071] The gas baffles 6 and the mist eliminator 9 are used to separate the oil droplets with a particle size less than 100 microns that have not settled by gravity in the air flow. The oil droplets are collected in the mist eliminator 9 mainly by collision and aggregation, and then flow into the liquid collection area under the action of gravity, thereby improving the efficiency and purity of oil and gas separation;

[0072] The mist eliminator 9 can effectively prevent oil droplets from entering subsequent equipment and pipelines, avoid the deposition, scaling, or corrosion of oil droplets in these parts, extend the service life of the equipment, and reduce the maintenance cost.

[0073] The preferred embodiments of the present invention disclosed above are merely used to assist in the description of the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An oil and gas separation device for oil exploitation, comprising a tank body (1), two groups of support legs (2) are evenly installed at the bottom of the tank body (1), and at least an oil and gas inlet (101), a natural gas outlet (102) and an oil drain port (105) are provided on the tank body (1), and it is characterized in that: The oil and gas inlet (101) and the natural gas outlet (102) are located on the upper side of the tank body (1), and the oil drain port (105) is located on the lower side of the tank body (1); A sleeve (8) is installed on the oil and gas inlet (101), and an oil and gas inlet assembly (7) is installed in the cavity formed by the oil and gas inlet (101) and the sleeve (8), and the oil and gas inlet assembly (7) forms a curved channel in the cavity; A water inlet pipe (801) communicating with the inlet end of the curved channel and a water outlet pipe (802) communicating with the outlet end of the curved channel are provided on the outer side of the sleeve (8); A sewage outlet (104) is provided on the lower side of the tank body (1), the sewage outlet (104) corresponds to the oil and gas inlet (101), the oil drain port (105) corresponds to the natural gas outlet (102), and a plurality of anti-wave plates (4) and an overflow partition plate (5) are provided at the bottom end of the inner wall of the tank body (1). The anti-wave plates (4) and the overflow partition plate (5) are both located between the sewage outlet (104) and the oil drain port (105), and the plurality of anti-wave plates (4) and an overflow partition plate (5) are evenly distributed at equal intervals, and the overflow partition plate (5) is located on the side close to the oil drain port (105); A gap is provided between the lower side edge of the anti-wave plate (4) and the inner wall of the tank body (1), and at the same time, a slope (108) is provided on the inner wall of the tank body (1), and the slope (108) is located below the anti-wave plate (4). The lower end of the slope (108) is close to the sewage outlet (104), and a drain port (109) is provided on the lower side of the tank body (1), and the drain port (109) is close to the upper end of the slope (108); The oil and gas inlet assembly (7) includes a heat exchange element (701), the heat exchange element (701) has a curved channel, the upper end of the heat exchange element (701) is connected with a pipe body (702), a connecting seat (7021) is provided in the port of the pipe body (702), a connecting rod (703) is installed in the connecting seat (7021), and the other end of the connecting rod (703) is sleeved with a horn-shaped shell (704), a spring (705) and a nut (706) located at the lower end of the heat exchange element (701), and the spring (705) pushes the horn-shaped shell (704) to be tightly attached to the end of the heat exchange element (701); The heat exchanger (701) is of a cylindrical structure. The heat exchanger (701) includes an inner ring body (7011) and an outer ring body (7012) located outside the inner ring body (7011). A number of vertically distributed plates (7013) are arranged on the outside of the inner ring body (7011). The vertically distributed plates (7013) penetrate through the outer ring body (7012). A first annular groove is formed between the inner ring body (7011) and the outer ring body (7012). A second annular groove is formed between the outer ring body (7012), the inner wall of the casing (8), and the inner wall of the oil and gas inlet (101). The top ends between the first annular groove and the second annular groove are separated by an annular plate body (7016). The bottom ends of the first annular groove and the second annular groove are communicated with each other. The first annular groove is communicated with the water inlet pipe (801). The second annular groove is communicated with the water outlet pipe (802). A ring seat (7014) is sleeved on the outside of the number of vertically distributed plates (7013). The ring seat (7014) is installed at the connection of the casing (8) and the oil and gas inlet (101). At the top end of the inner wall of the tank body (1), a guide plate (3) and a number of gas baffles (6) are installed. The guide plate (3) and the gas baffles (6) are both located between the oil and gas inlet (101) and the natural gas outlet (102). The guide plate (3) is correspondingly distributed with the oil and gas inlet (101). A number of through grooves are formed on the vertical side surfaces of the guide plate (3) and the gas baffles (6).

2. The oil and gas separation equipment for oil exploitation according to claim 1, characterized in that: The tank body (1) is an integrally formed structure by welding. An inspection opening (103) is provided on the upper side of the tank body (1).

3. An oil and gas separation device for oil exploitation according to claim 1, characterized in that: The spring (705) pushes the horn-shaped shell (704) to close the bottom end of the inner ring body (7011).

4. An oil and gas separation device for oil exploitation according to claim 1, characterized in that: A mist eliminator (9) is installed inside the tank body (1). The mist eliminator (9) is communicated with the lower port of the natural gas outlet (102).

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