Sampling device and method of preparing a coating

Abstract

This application discloses a sampling device and a method for preparing a coating. The sampling channel of the sampling device is sealed and connected to the sampling port of an oil well. Crude oil and gas enter the sampling chamber of the sampling container through the sampling channel, where they undergo gas-liquid separation under gravity. The gas in the sampling chamber enters the separation chamber of the separator through the airflow channel for further gas-liquid separation. The separated gas then enters a gas purifier for purification. Crude oil and gas are processed in a sealed manner within the sampling device, reducing the emission of toxic gases and gas pollution. The crude oil is mainly collected in the sampling bottle and then directly tested, avoiding the influence of the purification agent on the accuracy of crude oil detection. The separator is connected to the sampling channel and located within the separation chamber. The width of the separator increases linearly in the extension direction of the sampling channel, with the wider end of the separator facing the airflow channel. This improves separation efficiency and reduces the amount of gas that may mix in the droplets, which helps ensure the safety and accuracy of crude oil detection.

Description

Technical Field

[0001] This application belongs to the technical field of crude oil sampling equipment, and particularly relates to the preparation method of sampling device and coating. Background Technology

[0002] Crude oil refers to unprocessed petroleum, a viscous, oily liquid with a distinctive odor. Crude oil products play a very wide range of roles and functions in socio-economic development. To facilitate subsequent processing of crude oil, it is necessary to sample and analyze the crude oil from oil wells.

[0003] In existing technologies, crude oil sampling is primarily conducted using sampling bottles. The bottle opening is connected to the sampling port of the oil well to receive the crude oil flowing out. The collected crude oil then enters a gas purifier for purification, and finally, after separation, it is tested. For some sulfur-containing oil wells, during sampling, toxic impurities such as hydrogen sulfide and sulfur-containing gases may be extracted along with the crude oil. These toxic sulfur-containing gases easily escape into the air, causing pollution, and can also easily poison operators, posing a significant safety hazard. Furthermore, purifying or separating the gas and liquid before testing may affect the accuracy of crude oil analysis. Summary of the Invention

[0004] This application aims to address, at least to some extent, the problems of impurity gas contamination, significant safety hazards, and compromised detection accuracy during crude oil sampling from sulfur-containing oil wells. To this end, this application provides a sampling device and a method for preparing a coating.

[0005] This application provides a sampling device applied to an oil well equipped with a sampling port. The crude oil in the oil well contains impurity gases. The sampling device includes:

[0006] A separator includes a separation chamber and a gas outlet, wherein the separation chamber is used for gas-liquid separation and the gas outlet is connected to the separation chamber;

[0007] The sampling container is provided with a sampling chamber, a sampling channel and an airflow channel. The sampling channel is used to connect the sampling chamber and the sampling port, and the sampling channel passes through the separation chamber and its peripheral wall is sealed with the separator so that the crude oil can enter the sampling chamber through the sampling port and the sampling channel. The airflow channel is spaced apart from the sampling channel and is used to connect the separation chamber.

[0008] A separator is connected to the sampling channel and located within the separation chamber. The width of the separator increases linearly in the extension direction of the sampling channel, and the wider end of the separator faces the airflow channel.

[0009] The gas purifier has its purification inlet connected to the gas outlet of the separator for discharging impurity gases.

[0010] In some embodiments provided in this application, the sampling channel and the airflow channel extend in the same direction, the separator is connected to the sampling channel around the sampling channel, and both ends of the sampling channel extend out of the separation chamber.

[0011] In some embodiments provided in this application, the maximum width of the separator is greater than the maximum width of the airflow channel.

[0012] In some embodiments provided in this application, the airflow channel and the sampling channel are both connected to the top of the sampling container, and the sampling chamber is located at the bottom of the sampling container.

[0013] In some embodiments provided in this application, the sampling device further includes:

[0014] A coating is applied to the wall corresponding to the separation chamber to improve the corrosion resistance of the separation chamber.

[0015] In some embodiments provided in this application, the coating comprises polyurethane resin, phenolic resin, epoxy resin, titanium dioxide powder, and silicon dioxide, wherein the phenolic resin comprises 45-55% and the epoxy resin comprises 15-25%.

[0016] In some embodiments provided in this application, the sampling device further includes:

[0017] A flow passage component is connected to the sampling container and located within the airflow channel. The flow passage component is provided with multiple impurity gas flow passage holes that connect the sampling chamber and the airflow channel.

[0018] In some embodiments provided in this application, the gas purifier includes:

[0019] The main body has a receiving cavity, and the purification inlet is connected to the receiving cavity;

[0020] A purification solution is placed in the containment cavity to react with the impurity gas and remove the toxic components of the impurity gas.

[0021] An exhaust port is spaced apart from the purification inlet to discharge the purified impurity gas;

[0022] An alarm device is connected to the main body and is used to detect whether the purified impurity gas meets the emission standards.

[0023] This application provides a method for preparing a coating, applied to the preparation of a sampling device as described above, the sampling device including a coating, the coating being applied to the wall corresponding to the separation chamber, the preparation method comprising:

[0024] Resin blocks were prepared.

[0025] The resin block is ground to obtain resin particles;

[0026] The resin particles are mixed with a curing agent to obtain the raw material used to prepare the coating;

[0027] The raw material is coated onto the wall corresponding to the separation chamber to obtain the coating.

[0028] In some embodiments provided in this application, the "preparation of resin block" includes:

[0029] The reactor is heated to the first reaction temperature, and the polyurethane resin, phenolic resin and epoxy resin are mixed and stirred in the reactor.

[0030] Under the condition of the first reaction temperature, titanium dioxide powder and silicon dioxide are added sequentially to the reaction vessel;

[0031] First period of heat preservation;

[0032] Cooling is performed to obtain the resin block.

[0033] The embodiments of this application have at least the following beneficial effects:

[0034] For crude oil in oil wells that contains impurity gases, such as hydrogen sulfide, the sampling channel of the sampling device can be sealed and connected to the sampling port of the oil well. Crude oil and impurity gases can stably enter the sampling channel from the sampling port and then flow into the sampling chamber of the sampling container. The gases and crude oil will separate under gravity. The impurity gases in the sampling chamber can then enter the separation chamber of the separator through the airflow channel of the sampling container. Further gas-liquid separation occurs in the separation chamber, and the separated gas flows out through the gas outlet and then enters the gas purifier through the purification inlet for purification before being discharged. Throughout the entire process, both crude oil and impurity gases are processed and circulated within the sealed sampling device, reducing the risk of toxic gas release and associated safety hazards. Furthermore, the discharged gas effectively reduces gas pollution and potential safety risks. Furthermore, the addition of a separator between the gas purifier and the sampling container ensures that the crude oil and gas are sufficiently separated before the gas or crude oil droplets come into contact with the gas purifier and separator. This allows for direct detection of the oil in the sampling bottle and reduces the impact of purifying agents, purifying gases, or other materials within the gas purifier on the oil, thus improving the accuracy of crude oil detection. The sampling channel passes through the separator's separation chamber, increasing the integration of the sampling device and making it more portable. The separator is connected to the sampling channel and located within the separation chamber. The width of the separator increases linearly along the extension direction of the sampling channel, with the wider end facing the airflow channel. This allows crude oil droplets separated within the separation chamber to slide off the edge of the separator, preventing them from falling directly into the airflow channel and affecting gas entry into the separator. This improved separation efficiency and reduced potential gas mixing in the droplets helps ensure the safety and accuracy of crude oil detection. To a certain extent, this addresses the issues of impurity gas contamination, significant safety hazards, and compromised detection accuracy during crude oil sampling from sulfur-containing oil wells. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a sampling device provided in this application.

[0036] Figure 2 This is a flowchart illustrating a coating preparation method provided in this application.

[0037] Explanation of reference numerals in the attached drawings: 1. Separator; 11. Separation chamber; 12. Gas outlet; 2. Sampling container; 21. Sampling chamber; 22. Sampling channel; 23. Airflow channel; 3. Separating component; 4. Gas purifier; 41. Purification inlet; 42. Main body; 421. Receiving cavity; 43. Purification liquid; 44. Exhaust port; 45. Alarm device; 5. Flow-through component. Detailed Implementation

[0038] To enable those skilled in the art to better understand this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Figure 1 This is a schematic diagram of a sampling device provided in this application, with reference to... Figure 1 This application provides a sampling device for use in oil wells equipped with sampling ports (not shown in the figure), where the crude oil in the oil well contains impurity gases. The sampling device includes a separator 1, a sampling container 2, a separating element 3, and a gas purifier 4.

[0040] The separator 1 includes a separation chamber 11 and a gas outlet 12. The separation chamber 11 is used for gas-liquid separation, and the gas outlet 12 is connected to the separation chamber 11.

[0041] The sampling container 2 is provided with a sampling chamber 21, a sampling channel 22 and an airflow channel 23. The sampling channel 22 is used to connect the sampling chamber 21 and the sampling port. The sampling channel 22 passes through the separation chamber 11 and its peripheral wall is sealed with the separator 1 so that crude oil can enter the sampling chamber 21 through the sampling port and the sampling channel 22. The airflow channel 23 is spaced apart from the sampling channel 22 and is used to connect the separation chamber 11.

[0042] The separator 3 is connected to the sampling channel 22 and located in the separation chamber 11. The width of the separator 3 increases linearly in the extension direction of the sampling channel 22, and the wider end of the separator 3 faces the airflow channel 23.

[0043] The purification inlet 41 of the gas purifier 4 is connected to the gas outlet 12 of the separator 1 for discharging impurity gas.

[0044] For crude oil in oil wells that contains impurity gases, such as hydrogen sulfide, the sampling channel 22 of the sampling device can be sealed and connected to the sampling port of the oil well. Crude oil and impurity gases can stably enter the sampling channel 22 from the sampling port and then enter the sampling chamber 21 of the sampling container 2. The gases and crude oil will separate under gravity. The impurity gases in the sampling chamber 21 can enter the separation chamber 11 of the separator 1 through the airflow channel 23 of the sampling container 2. Further gas-liquid separation occurs in the separation chamber 11. The separated gas flows out through the gas outlet 12 and then enters the gas purifier 4 through the purification inlet 41 for purification before being discharged. Throughout the entire process, the crude oil and impurity gases are processed in a sealed manner within the sampling device, which reduces the risk of safety hazards caused by the escape of toxic gases. Furthermore, the discharged gas effectively reduces gas pollution and minimizes the safety hazards associated with the discharged gas. Furthermore, a separator 1 is added between the gas purifier 4 and the sampling container 2. Before the gas or crude oil droplets come into contact with the gas purifier 4 and the separator 1, the crude oil and gas have already undergone sufficient separation. The oil in the sampling bottle can be directly detected, which also reduces the influence of the purifying agent, purifying gas, or other materials in the gas purifier 4 on the oil, improving the accuracy of oil detection in crude oil. The sampling channel 22 passes through the separation chamber 11 of the separator 1, which improves the integration of the sampling device and makes it more portable. The separator 3 is connected to the sampling channel 22 and located within the separation chamber 11. The width of the separator 3 increases linearly in the extension direction of the sampling channel 22. The wider end of the separator 3 faces the airflow channel 23, allowing the crude oil droplets separated in the separation chamber 11 to slide off the edge of the separator 3, preventing the droplets from falling directly into the airflow channel 23 and affecting the gas entering the separator 1. This improves separation efficiency and reduces the amount of gas that may be mixed in the droplets, which helps ensure the safety and accuracy of crude oil detection. To some extent, this addresses the issues of impurity gas contamination, significant safety hazards, and compromised detection accuracy during crude oil sampling from sulfur-containing oil wells.

[0045] Because the crude oil extracted from the oil well is at a high temperature, after the crude oil is collected in the sampling container 2, when some of the oil enters the separation chamber 11, some liquefied droplets mixed with the high-temperature impurity gas will condense into droplets on the lower-temperature walls of the separation chamber 11 and the separation element 3. These droplets can fall and be collected in the sampling container 2 under the influence of gravity. Since these droplets are few, they will not affect the impurity gas flowing out of the gas flow channel 23. The overall separation efficiency is high. Furthermore, in this application, the possibility of impurity gas escaping is low, so sampling personnel do not need to wear gas masks during sampling, reducing their workload.

[0046] It should be noted that this application can be applied to oil wells where crude oil contains various impurity gases. These impurity gases can be toxic gases such as hydrogen sulfide or carbon monoxide, or other gases that may cause gas pollution. This application does not impose any limitations on this. In this application, both the sampling channel 22 and the gas flow channel 23 have corresponding physical structures. These physical structures can be, for example, pipes or strip structures with channels. The separator 3 is connected to the sampling channel 22, meaning the separator 3 is connected to the physical structure containing the sampling channel 22; this application does not impose any limitations on this connection.

[0047] In some embodiments provided in this application, the sampling channel 22 and the airflow channel 23 extend in the same direction, the separator 3 is connected to the sampling channel 22 around the sampling channel 22, and both ends of the sampling channel 22 extend out of the separation chamber 11.

[0048] The sampling channel 22 and the airflow channel 23 extend in the same direction. The separator 3 is connected to the sampling channel 22 around the sampling channel 22. The separator 3 can make the droplets fall from the part corresponding to the edge of the airflow channel 23, so as to avoid the droplets affecting the gas flowing out of the airflow channel 23 and improve the gas-liquid separation efficiency.

[0049] In some embodiments provided in this application, the maximum width of the separator 3 is greater than the maximum width of the airflow channel 23. This can effectively reduce the possibility that the collected and falling droplets on the separator 3 will come into contact with the airflow channel 23, which is beneficial to improving the efficiency of gas-liquid separation.

[0050] In some embodiments provided in this application, the separator 3 may be a rotating body. This can uniformly improve the gas-liquid separation efficiency.

[0051] In some embodiments provided in this application, the separator 3 may also be annular or umbrella-shaped, and the upper surface of the separator 3 is an annular curved surface. This increases the area for contact with and collection of droplets, thereby improving the efficiency of gas-liquid separation.

[0052] In some embodiments provided in this application, the separation chamber 11 may be cylindrical, and the axial direction of the separation chamber 11 extends in the same direction as the sampling channel 22. This can reduce the overall space required for the separator 1, increase the overall integration of the sampling device, and make it more portable.

[0053] In some embodiments provided in this application, the separator 1 may be a gas-liquid separator based on the condensation principle, a gas-liquid separator based on gravity separation, or a separator that achieves gas-liquid separation by rotation. This application does not impose any limitations on this.

[0054] In some embodiments provided in this application, the separator 1 may include a honeycomb separator (not shown in the figure) disposed in the separation chamber 11. When the impurity gas comes into contact with the honeycomb separator, some droplets condense, while the gas continues to rise and enter the purifier for purification. This method has low manufacturing costs and good separation effect.

[0055] In some embodiments provided in this application, the honeycomb separator can be a plate-like or block-like structure with multiple honeycomb holes. The honeycomb separator can be located above the separator 3, and the sampling channel 22 can pass through the honeycomb separator. This facilitates installation and gas-liquid separation. The honeycomb separator can also be arranged around the separator 3, and this application does not limit this.

[0056] In some embodiments provided in this application, the sampling container 2 may be a sampling bottle or a sampling box, with an inner cavity forming a sampling chamber 21. The inner cavity of the sampling bottle or the inner cavity of the sampling box may be connected to the sampling channel 22 or the airflow channel 23 through an interface. This application does not impose any limitations on this.

[0057] In some embodiments provided in this application, the sampling channel 22 can be connected to the sampling container 2, and a portion of the sampling channel 22 can be located within the airflow channel 23 and the sampling chamber 21. This design offers high integration, portability, and facilitates the collection of crude oil and the flow of gas.

[0058] In some embodiments provided in this application, both the airflow channel 23 and the sampling channel 22 are connected to the top of the sampling container 2, and the sampling chamber 21 is located at the bottom of the sampling container 2. This facilitates the gravity settling of crude oil. After the crude oil enters the bottom of the sampling container 2 through the sampling channel 22, on the one hand, the crude oil itself has a certain momentum, and when the crude oil enters the sampling chamber 21, it will collide with the bottom of the sampling chamber 21, causing the liquid and gas in the crude oil to separate; on the other hand, under the action of gravity, gases and liquids of different masses also tend to separate, and the lighter gases will rise to the airflow channel 23 and flow out of the sampling container 2. The separation effect is good, and the crude oil will not be contaminated.

[0059] In some embodiments provided in this application, the separator 1 may also be located above the sampling container 2. This also provides gravity separation, resulting in better separation and higher accuracy in crude oil detection.

[0060] In some embodiments provided in this application, the sampling device further includes a coating (not shown in the figures). The coating is applied to the wall corresponding to the separation chamber 11 to improve the corrosion resistance of the separation chamber 11.

[0061] The coating can improve the corrosion resistance of the separation chamber 11 and extend the service life of the sampling device.

[0062] In some embodiments provided in this application, the coating composition may also include materials that inherently possess a certain degree of corrosion resistance. This application does not impose any limitations on this.

[0063] In some embodiments provided in this application, the coating composition includes polyurethane resin, phenolic resin, epoxy resin, titanium dioxide powder, and silicon dioxide, with the phenolic resin component being 45-55% and the epoxy resin component being 15-25%.

[0064] These materials can be mixed to form a polyurethane-phenolic metal resin. They are easy to prepare and readily available. Furthermore, when the proportions of each component in the coating are within the above range, the resulting coating exhibits good corrosion resistance, effectively extending the service life of the sampling device.

[0065] In some embodiments provided in this application, the coating may also be applied to the sampling channel 22, the airflow channel 23, the separation chamber 11, and the structure connecting the purifier and the separator 1. This can improve the overall service life of the sampling device. The coating may also include a curing agent for curing the components in the coating; this application does not limit this.

[0066] In some embodiments provided in this application, the coating can be applied to the desired wall surface. The spray gun used for coating can have an orifice diameter of 0.5-1.0 mm and a nozzle diameter of 50 micrometers. The inner and outer surfaces of the separation chamber are cleaned and kept dry and clean. The dosage ratio of modified polyurethane epoxy phenolic resin to curing agent is 9:1. The resin is evenly sprayed onto the surface of the separation chamber using a spray gun, and finally the surface is smoothed using a scraper. Curing is performed for 24 hours. This improves the quality of the resulting coating.

[0067] In some embodiments provided in this application, the sampling device further includes a flow-through element 5.

[0068] The flow-through component 5 is connected to the sampling container 2 and is located within the airflow channel 23. The flow-through component 5 is provided with multiple impurity gas flow-through holes that connect the sampling chamber 21 and the airflow channel 23.

[0069] The flow-through component 5 reduces the possibility of droplets entering the separation chamber 11, which is beneficial for rapid gas-liquid separation. It also reduces the impact on the crude oil liquid in the sampling container 2, improving detection accuracy.

[0070] In some embodiments provided in this application, the flow-through element 5 may be plate-shaped, column-shaped, or other irregularly shaped, and the impurity gas flow-through holes may be on the millimeter scale. The separation effect is good. This application does not impose any limitations on this.

[0071] In some embodiments provided in this application, the gas purifier 4 may include a body 42, a purification liquid 43, an exhaust port 44, and an alarm device 45.

[0072] The main body 42 is provided with a receiving cavity 421, and the purification inlet 41 is connected to the receiving cavity 421.

[0073] Purifying liquid 43 is placed in the receiving cavity 421 to react with the impurity gas and remove the toxic components of the impurity gas.

[0074] The exhaust port 44 is spaced apart from the purification inlet 41 to discharge the purified impurity gas.

[0075] The alarm device 45 is connected to the main body 42 and is used to detect whether the purified impurity gas meets the emission standards.

[0076] The gas purifier 4 adopts the above structure, which has a low manufacturing cost and a good purification effect.

[0077] In some embodiments provided in this application, the gas purifier 4 may also be a purification device, for example, equipped with a purifying agent. This application does not impose any limitations on this.

[0078] In some embodiments provided in this application, the gas purifier 4 and the separator 1 can be connected by a pipe. The pipe can increase the distance between the gas purifier 4 and the separator 1, so that the finally emitted gas is farther away from the sampling personnel, thereby improving the safety of the sampling personnel during sampling.

[0079] In some embodiments provided in this application, the purification solution 43 may be a composite methyldiethanolamine solution. The preparation method of the composite methyldiethanolamine solution may include the following steps: dissolving methyldiethanolamine and a secondary amine in water to prepare a composite methyldiethanolamine solution containing 20% ​​methyldiethanolamine and 1% secondary amine. The pH of the solution is adjusted to 7. The overall absorption effect is good.

[0080] In some embodiments provided in this application, the separator 1, sampling container 2, purifier, and sampling port in the sampling device can be connected via pipes such as high-pressure explosion-proof hoses. The sampling channel 22 can be a high-pressure explosion-proof hose, and the connections between the hose and the sampling port, as well as between the containers and devices, can be made through sealed joints. This effectively prevents the escape of toxic gases and the splashing of crude oil, thus improving sampling safety.

[0081] In some embodiments provided in this application, the sampling channel 22 may be a channel formed on the inner wall of the sampling tube, and a high-pressure stainless steel hose connects the oil well sampling valve and the sampling tube; the flow-through component 5 of the separator 1 is connected to the sampling container 2. The separator 1, sampling tube, separator 3, and are coated with polyurethane phenolic metal resin. The separator 1 is connected to a gas purifier 4 containing a composite methyl diethanolamine solution, and the exhaust port 44 of the gas purifier 4 is connected to a hydrogen sulfide detection alarm device 45. The hydrogen sulfide detection alarm device 45 has an outlet at its upper part to discharge the filtered gas into the air.

[0082] In some embodiments provided in this application, the remaining gas after the reaction is discharged through the exhaust port 44 of the gas purifier 4, and is detected by a hydrogen sulfide detection alarm device 45 equipped with a hydrogen sulfide gas detection probe, before being discharged into the atmosphere through the exhaust port 44. If the detected hydrogen sulfide content in the discharged gas is higher than 10 ppm, the hydrogen sulfide detection alarm device 45 will sound an alarm, indicating that the composite methyldiethanolamine purification solution 43 has become saturated with hydrogen sulfide and needs to be replaced.

[0083] Figure 2 A flowchart of a coating preparation method provided in this application is shown below. Figure 2 This application provides a method for preparing a coating, applied to the preparation of the sampling device as described above. The sampling device includes a coating, which is applied to the wall corresponding to the separation chamber. The preparation method includes:

[0084] S101: Prepare resin blocks.

[0085] S102: Grind the resin block to obtain resin particles.

[0086] S103: The raw material used to prepare the coating is obtained by mixing resin particles with a curing agent.

[0087] S104: Coat the raw material onto the wall corresponding to the separation chamber to obtain a coating.

[0088] The technical effects of the sampling device are described above and will not be repeated here. Adopting the above steps can improve the density and ease of preparation of the coating, thereby extending the service life of the sampling device.

[0089] In some embodiments provided in this application, step S101, "preparing a resin block", may include:

[0090] The temperature is raised to the first reaction temperature, and polyurethane resin, phenolic resin and epoxy resin are added to the reactor and mixed and stirred at the first reaction temperature.

[0091] Under the condition of the first reaction temperature, titanium dioxide powder and silicon dioxide are added to the reactor in sequence.

[0092] First time for heat preservation.

[0093] Cool down to obtain resin blocks.

[0094] The resulting coating is of good quality and can effectively extend the service life of the sampling device used.

[0095] In some embodiments provided in this application, the first reaction temperature can be any value between 75°C and 80°C. The first time period can be 1 to 3 hours. The resulting coating has good quality.

[0096] In some embodiments provided in this application, the coating is composed of the following raw materials in the indicated mass fractions: 20 parts polyurethane resin, 50 parts phenolic resin, 20 parts epoxy resin, 5 parts titanium dioxide powder, and 5 parts silicon dioxide. The preparation method of the above coating includes the following steps: Nitrogen gas is first introduced into a clean reactor for protection. While stirring, 20 parts polyurethane resin, 50 parts phenolic resin, and 20 parts epoxy resin are added in the indicated mass fractions. Simultaneously, the temperature is raised to 78°C, and then 5 parts titanium dioxide powder and 5 parts silicon dioxide are added sequentially. The mixture is kept at this temperature for 2 hours, and then cooled. The resulting resin block is ground 4-5 times using a grinder and passed through a 200-mesh sieve. A curing agent is then mixed to obtain the raw materials for the coating. This process can improve the quality of the obtained coating.

[0097] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0098] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A sampling device, characterized in that, Applied to oil wells equipped with sampling ports, wherein the crude oil in the oil well is mixed with impurity gases, the sampling device includes: A separator includes a separation chamber and a gas outlet, wherein the separation chamber is used for gas-liquid separation and the gas outlet is connected to the separation chamber; The sampling container is provided with a sampling chamber, a sampling channel and an airflow channel. The sampling channel is used to connect the sampling chamber and the sampling port, and the sampling channel passes through the separation chamber and its peripheral wall is sealed with the separator so that the crude oil can enter the sampling chamber through the sampling port and the sampling channel. The airflow channel is spaced apart from the sampling channel and is used to connect the separation chamber. A separator is connected to the sampling channel and located inside the separation chamber. The width of the separator increases linearly in the extension direction of the sampling channel. The wider end of the separator faces the airflow channel, allowing the crude oil droplets separated in the separation chamber to slide off the edge of the separator. A gas purifier, wherein the purification inlet is connected to the gas outlet of the separator for discharging impurity gases; The sampling device further includes: A flow passage component is connected to the sampling container and located within the airflow channel. The flow passage component is provided with multiple impurity gas flow passage holes that connect the sampling chamber and the airflow channel; the impurity gas flow passage holes are millimeter-sized. The separator also includes a honeycomb separator disposed in the separation chamber. The honeycomb separator is located above the separator, and the sampling channel passes through the honeycomb separator. The honeycomb separator is a plate-shaped or block-shaped structure with multiple honeycomb holes. The sampling channel and the airflow channel extend in the same direction, the separator is connected to the sampling channel around the sampling channel, and both ends of the sampling channel extend out of the separation chamber.

2. The sampling device of claim 1, wherein, The maximum width of the separator is greater than the maximum width of the airflow channel.

3. The sampling device of any one of claims 1-2, wherein, Both the airflow channel and the sampling channel are connected to the top of the sampling container, and the sampling chamber is located at the bottom of the sampling container.

4. The sampling device according to any one of claims 1 to 2, characterized in that The sampling device further includes: A coating is applied to the wall corresponding to the separation chamber to improve the corrosion resistance of the separation chamber.

5. The sampling device of claim 4, wherein, The coating comprises polyurethane resin, phenolic resin, epoxy resin, titanium dioxide powder, and silicon dioxide, wherein the phenolic resin comprises 45-55% and the epoxy resin comprises 15-25%.

6. The sampling device according to any one of claims 1 to 2, characterized in that, The gas purifier includes: The main body has a receiving cavity, and the purification inlet is connected to the receiving cavity; A purification solution is placed in the containment cavity to react with the impurity gas and remove the toxic components of the impurity gas. An exhaust port is spaced apart from the purification inlet to discharge the purified impurity gas; An alarm device is connected to the main body and is used to detect whether the purified impurity gas meets the emission standards.

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