Sampling device and preparation method of coating

Abstract

The invention discloses a sampling device and a preparation method of a coating. A sampling channel of the sampling device is connected to a sampling opening of an oil well in a sealed mode. Crude oil and gas enter the sampling cavity of the sampling container through the sampling channel, and gas-liquid separation is performed under gravity. And the gas in the sampling cavity enters the separation cavity of the separator through the gas flow channel for further gas-liquid separation. And the separated gas enters a gas purifier to be purified. Crude oil and gas are subjected to sealed circulation treatment in the sampling device, so that toxic gas dissipation and gas pollution are reduced. Crude oil is mainly collected in the sampling bottle and is finally directly detected, so that the purifying agent is prevented from influencing the crude oil detection accuracy. The separating part is connected with the sampling channel and located in the separating cavity, the width of the separating part is linearly increased in the extending direction of the sampling channel, and the wider end of the separating part faces the airflow channel. The separation efficiency is improved, gas possibly mixed in liquid drops is reduced, and the safety and accuracy of crude oil detection are guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of crude oil sampling equipment, and in particular to a sampling device and a method for preparing a coating. Background Art

[0002] Crude oil refers to unprocessed petroleum, a viscous oily liquid with a special smell. Crude oil products have a very wide range of roles and functions in social and economic development. In order to facilitate the subsequent processing of crude oil, it is necessary to sample the crude oil in the oil well for testing.

[0003] In the prior art, crude oil is mainly sampled through sampling bottles. The mouth of the sampling bottle is connected to the sampling port of the oil well to receive the crude oil flowing out of the sampling port. The collected crude oil then enters the gas purifier for purification, and finally separated before testing the crude oil. For some sulfur-containing oil wells, when workers take samples, for example, hydrogen sulfide and sulfur-containing toxic impurity gases will be extracted together with the crude oil. Toxic impurity gases containing sulfur are easy to escape into the air, causing pollution, and toxic impurity gases containing sulfur are also easy to cause poisoning of operators when they escape, posing a great safety hazard; and after sampling, purification or gas-liquid separation first, and then testing, may also affect the accuracy of crude oil testing. Summary of the invention

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

[0005] A sampling device provided in an embodiment of the present application is applied to an oil well provided with a sampling port, wherein the crude oil in the oil well is mixed with impurity gas, and the sampling device comprises:

[0006] A separator, comprising 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] A sampling container, provided with a sampling cavity, a sampling channel and an airflow channel, wherein the sampling channel is used to connect the sampling cavity with the sampling port, and the sampling channel passes through the separation cavity and the peripheral wall is sealed with the separator, so that the crude oil can enter the sampling cavity through the sampling port and the sampling channel, and the airflow channel is spaced from the sampling channel and is used to connect with the separation cavity;

[0008] A separator connected to the sampling channel and located in the separation chamber, wherein the width of the separator increases linearly in the extending direction of the sampling channel, and an end of the separator with a larger width faces the airflow channel;

[0009] A gas purifier, wherein the purification inlet is connected to the gas outlet of the separator for discharging impurity gas.

[0010] In some embodiments provided in the present application, the sampling channel and the airflow channel extend in the same direction, the separation element is connected to the sampling channel so as to surround the sampling channel, and both ends of the sampling channel extend out of the separation chamber.

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

[0012] In some embodiments provided in the present application, the air flow channel and the sampling channel are both connected to the top of the sampling container, and the sampling cavity is located at the bottom of the sampling container.

[0013] In some embodiments provided in the present application, the sampling device further comprises:

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

[0015] In some embodiments provided in the present application, the components of the coating include polyurethane resin, phenolic resin, epoxy resin, titanium dioxide powder, and silicon dioxide, and the phenolic resin component is 45-55%, and the epoxy resin component is 15-25%.

[0016] In some embodiments provided in the present application, the sampling device further comprises:

[0017] The flow member is connected to the sampling container and is located in the air flow channel. The flow member is provided with a plurality of impurity gas flow holes connecting the sampling cavity and the air flow channel.

[0018] In some embodiments provided in the present application, the gas purifier comprises:

[0019] The main body is provided with a containing cavity, and the purification inlet is communicated with the containing cavity;

[0020] A purification liquid is placed in the containing chamber to react with the impurity gas to remove toxic components of the impurity gas;

[0021] An exhaust port, spaced apart from the purification inlet, for discharging 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 standard.

[0023] The present application provides a method for preparing a coating, which is applied to preparing a sampling device as described above, wherein the sampling device comprises a coating, and the coating is applied to a wall corresponding to the separation chamber. The preparation method comprises:

[0024] A resin block is prepared;

[0025] grinding the resin mass to obtain resin particles;

[0026] Mixing the resin particles with a curing agent to obtain a raw material for preparing the coating;

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

[0028] In some embodiments provided in the present application, the “preparing a resin block” includes:

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

[0030] Under the condition of the first reaction temperature, adding titanium dioxide powder and silicon dioxide into the reaction kettle in sequence;

[0031] The first heat preservation period;

[0032] The temperature was lowered to obtain the resin mass.

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

[0034] For crude oil mixed with impurity gases in oil wells, such as crude oil containing 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 enter the sampling cavity of the sampling container through the sampling channel, and the gas and crude oil oil will be separated under gravity. The impurity gas in the sampling cavity can pass through the airflow channel of the sampling container and enter the separation cavity of the separator from the airflow channel, and further separate the gas and liquid in the separation cavity. The separated gas flows out through the gas outlet, and then enters the gas purifier from the purification inlet for purification and discharge. During the whole process, crude oil and impurity gases are circulated and processed in a sealed manner inside the sampling device, which can reduce the safety hazards caused by the escape of toxic gases, and the discharged gas can effectively reduce gas pollution, and can also reduce the safety hazards caused by the discharged gas. A separator is added between the gas purifier and the sampling container. Before the gas or crude oil droplets contact the gas purifier and the separator, the crude oil and the gas have been fully separated. The oil in the sampling bottle can be directly detected, and the influence of the purifier, purification gas or other materials in the gas purifier on the oil can be reduced, thereby improving the detection accuracy of the oil in the crude oil. The sampling channel passes through the separation cavity of the separator, which can improve the integration of the sampling device and make the sampling device more portable. The separator is connected to the sampling channel and is located in the separation cavity. The width of the separator increases linearly in the extension direction of the sampling channel. The end of the separator with a larger width faces the airflow channel, which can make the crude oil droplets separated in the separation cavity slide from the edge of the separator to avoid the droplets falling directly into the airflow channel to affect the gas entering the separator. Improving the separation efficiency and reducing the gas that may be mixed in the droplets are conducive to ensuring the safety and accuracy of crude oil detection. To a certain extent, it solves the problems of impurity gas pollution, large safety hazards and detection accuracy when sampling crude oil from sulfur-containing oil wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the structure of a sampling device provided in this application.

[0036] Figure 2 A flow chart of a method for preparing a coating provided in this application.

[0037] Explanation of the accompanying drawings: 1. separator; 11. separation chamber; 12. gas outlet; 2. sampling container; 21. sampling chamber; 22. sampling channel; 23. air flow channel; 3. separation element; 4. gas purifier; 41. purification inlet; 42. main body; 421. containing chamber; 43. purification liquid; 44. exhaust port; 45. alarm device; 5. flow-through element. DETAILED DESCRIPTION

[0038] In order to enable technicians in the technical field to which the present application belongs to understand the present application more clearly, the technical solution of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0039] Figure 1 A schematic diagram of the structure of a sampling device provided in this application, refer to Figure 1 In an embodiment of the present application, a sampling device is provided, which is applied to an oil well provided with a sampling port (not shown in the figure), and the crude oil in the oil well is mixed with impurity gas. The sampling device includes a separator 1, a sampling container 2, a separator 3 and a gas purifier 4.

[0040] The separator 1 comprises 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 air flow channel 23. The sampling channel 22 is used to connect the sampling chamber 21 with the sampling port, and the sampling channel 22 passes through the separation chamber 11 and the surrounding wall is sealed with the separator 1, so that the crude oil can enter the sampling chamber 21 through the sampling port and the sampling channel 22. The air flow channel 23 is spaced 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 is 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 end of the separator 3 with a larger width faces the airflow channel 23 .

[0043] The purification inlet 41 of the gas purifier 4 communicates with the gas outlet 12 of the separator 1 for discharging impurity gases.

[0044] For crude oil mixed with impurity gases in oil wells, such as crude oil containing 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 enter the sampling chamber 21 of the sampling container 2 through the sampling channel 22, and the gas and crude oil oil will be separated under gravity. The impurity gas in the sampling chamber 21 can pass through the airflow channel 23 of the sampling container 2, enter the separation chamber 11 of the separator 1 from the airflow channel 23, and further separate the gas and liquid in the separation chamber 11. The separated gas flows out through the gas outlet 12, and then enters the gas purifier 4 from the purification inlet 41 for purification and discharge. During the whole process, crude oil and impurity gases are circulated and processed in a sealed manner inside the sampling device, which can reduce the safety hazards caused by the escape of toxic gases, and the discharged gas can effectively reduce gas pollution, and can also reduce the safety hazards caused by the discharged gas. A separator 1 is added between the gas purifier 4 and the sampling container 2. Before the gas or crude oil droplets contact the gas purifier 4 and the separator 1, the crude oil and the gas have been fully separated. The oil in the sampling bottle can be directly detected, and the influence of the purifier, purification gas or other materials in the gas purifier 4 on the oil can be reduced, thereby improving the detection accuracy of the oil in the crude oil. The sampling channel 22 passes through the separation chamber 11 of the separator 1, which can improve the integration of the sampling device and make the sampling device more portable. The separator 3 is connected to the sampling channel 22 and is located in the separation chamber 11. The width of the separator 3 increases linearly in the extension direction of the sampling channel 22. The end of the separator 3 with a larger width faces the airflow channel 23, which can make the crude oil droplets separated in the separation chamber 11 slide off the edge of the separator 3, avoiding the droplets from falling directly into the airflow channel 23 and affecting the gas entering the separator 1. Improving the separation efficiency and reducing the gas that may be mixed in the droplets are conducive to ensuring the safety and accuracy of crude oil detection. To a certain extent, it solves the problems of impurity gas pollution, major safety hazards and affected detection accuracy when sampling crude oil from sulfur-containing oil wells.

[0045] Since the temperature of the crude oil extracted from the oil well is relatively high, after the crude oil is collected in the sampling container 2, when part of the oil enters the separation chamber 11, some liquefied droplets mixed in the high-temperature impurity gas will condense into droplets on the wall of the separation chamber 11 and the separation element 3 with a lower temperature. These droplets can fall under the action of gravity and be collected in the sampling container 2. These droplets are relatively small, so they will not affect the impurity gas flowing out of the airflow channel 23. The overall separation efficiency is relatively high. In addition, in the present application, the possibility of impurity gas escaping is relatively low, so the sampling personnel do not need to wear a gas mask when sampling, which can reduce the labor intensity of the sampling personnel.

[0046] It should be noted that the present application can be applied to oil wells containing different impurity gases in crude oil, and the impurity gases can be toxic gases such as hydrogen sulfide or carbon monoxide, or some gases that can cause gas pollution. The present application does not limit this. In the present application, there are corresponding physical structures in the sampling channel 22 or the airflow channel 23. The physical structure can be, for example, a pipeline or a strip structure with a channel. The separator 3 is connected to the sampling channel 22, and the separator 3 is connected to the physical structure where the sampling channel 22 is located, and the present application does not limit this.

[0047] In some embodiments provided in the present 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 so as to surround 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, and the separator 3 is connected to the sampling channel 22 around the sampling channel 22. The separator 3 can make the droplets fall from a position more corresponding to the edge of the airflow channel 23, thereby preventing the droplets from affecting the gas flowing out of the airflow channel 23 and improving the gas-liquid separation efficiency.

[0049] In some embodiments provided in the present 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 liquid droplets collected and dropped on the separator 3 will contact the airflow channel 23, which is beneficial to improving the efficiency of gas-liquid separation.

[0050] In some embodiments provided in the present application, the separation element 3 may be a rotating body, which can evenly improve the gas-liquid separation efficiency.

[0051] In some embodiments provided in the present application, the separator 3 may also be an annular umbrella shape, and the upper surface of the separator 3 is an annular curved surface, which can increase the area of ​​contact with and collection of droplets, thereby making the gas-liquid separation more efficient.

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

[0053] In certain embodiments provided in the present application, the separator 1 may be a gas-liquid separator 1 based on the condensation principle, or a gas-liquid separator 1 based on gravity separation, or a separator 1 that realizes gas-liquid separation by rotation, which is not limited in the present application.

[0054] In some embodiments provided in the present application, the separator 1 may include a honeycomb separator (not shown in the figure) disposed in the separation chamber 11. When the impurity gas contacts the honeycomb separator, part of the droplets condense, and the gas continues to rise into the purifier for purification. The preparation cost is low and the separation effect is good.

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

[0056] In some embodiments provided in the present application, the sampling container 2 may be a sampling bottle or a sampling box, the inner cavity of which forms a sampling cavity 21, and 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. The present application does not limit this.

[0057] In some embodiments provided by the present application, the sampling channel 22 can be connected to the sampling container 2, and a portion of the sampling channel 22 can be located in the gas flow channel 23 and the sampling cavity 21. The integration is high, portable, and convenient for crude oil collection and gas flow.

[0058] In certain embodiments provided by the present application, the airflow channel 23 and the sampling channel 22 are both 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 can facilitate the gravity sedimentation of crude oil. After the crude oil enters the bottom of the sampling container 2 from 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, and the collision will cause 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 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 the present application, the separator 1 may also be located above the sampling container 2. This also has the effect of gravity separation, with better separation effect and higher crude oil detection accuracy.

[0060] In some embodiments provided in the present application, the sampling device further comprises a coating (not shown in the figure). 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 provision of the coating can improve the corrosion resistance of the separation chamber 11 and extend the service life of the sampling device.

[0062] In certain embodiments provided in the present application, the coating composition may also include a material that itself has a certain degree of corrosion resistance, and the present application does not limit this.

[0063] In some embodiments provided in the present application, the components of the coating include polyurethane resin, phenolic resin, epoxy resin, titanium dioxide powder, and silicon dioxide, and the component of the phenolic resin is 45-55%, and the component of the epoxy resin is 15-25%.

[0064] These materials can be mixed into polyurethane phenolic metal resin, which is easy to prepare and obtain. When the proportion of each component in the coating is within the above range, the obtained coating has good corrosion resistance and can more effectively extend the service life of the sampling device.

[0065] In some embodiments provided in the present application, the coating can also be provided on the sampling channel 22, the airflow channel 23, the separation chamber 11, and the structure connecting the purifier and the separator 1. The overall service life of the sampling device can be improved. The coating can also include a curing agent for curing the components in the coating, which is not limited in the present application.

[0066] In certain embodiments provided by the present application, the coating can be applied to the desired wall. The caliber of the spray gun used for coating can be 0.5-1.0 mm, and the nozzle aperture can be 50 microns. Clean the inner and outer surfaces of the separation box and keep the surface dry and clean. The dosage ratio of the modified polyurethane epoxy phenolic resin to the curing agent is 9 to 1. Use a spray gun to evenly spray the resin on the surface of the separation box, and finally use a scraper to level the surface. Curing for 24 hours. The quality of the obtained coating can be improved.

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

[0068] The flow member 5 is connected to the sampling container 2 and is located in the air flow channel 23. The flow member 5 is provided with a plurality of impurity gas flow holes connecting the sampling chamber 21 and the air flow channel 23.

[0069] The flow-through member 5 can reduce the possibility of liquid droplets entering the separation chamber 11, which is beneficial to the rapid separation of gas and liquid, and can also reduce the impact on the crude oil liquid in the sampling container 2, thereby improving the detection accuracy.

[0070] In some embodiments provided in the present application, the flow member 5 may be plate-shaped, column-shaped or other irregular shapes, and the impurity gas flow hole may be millimeter-sized. The separation effect is good. The present application does not limit this.

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

[0072] The body 42 is provided with a receiving chamber 421 , and the purification inlet 41 is communicated with the receiving chamber 421 .

[0073] The purification liquid 43 is placed in the accommodating chamber 421 to react with the impurity gas to 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 body 42 and is used to detect whether the purified impurity gas meets the emission standard.

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

[0077] In some embodiments provided in the present application, the gas purifier 4 may also be, for example, a purification device provided with a purifying agent, but the present application does not limit this.

[0078] In some embodiments provided in the present application, the gas purifier 4 and the separator 1 may be connected via a pipeline. The pipeline can increase the distance between the gas purifier 4 and the separator 1, so that the final discharged gas is farther away from the sampling personnel, thereby improving the safety of the sampling personnel when sampling.

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

[0080] In some embodiments provided by the present application, the separator 1, the sampling container 2, the purifier, and the sampling port in the sampling device can be connected through pipelines such as high-pressure explosion-proof hoses, and the sampling channel 22 can be a high-pressure explosion-proof hose, and the connection between the hose and the sampling port and each container and device can be connected through a sealed joint. It can effectively prevent the escape of toxic gases and the splashing of crude oil, and improve the safety of sampling.

[0081] In certain embodiments provided by the present application, the sampling channel 22 can be a channel formed by the inner wall of the sampling tube, and the high-pressure stainless steel hose is connected to the oil well sampling valve and the sampling tube; the flow-through part 5 of the separator 1 is connected to the sampling container 2. The separator 1, the sampling tube, the separator 3, and the polyurethane phenolic metal resin are coated. The separator 1 is connected to the gas purifier 4 containing the composite methyldiethanolamine liquid, and the exhaust port 44 of the gas purifier 4 is connected to the hydrogen sulfide detection alarm device 45. The upper part of the hydrogen sulfide detection alarm device 45 has an outlet to discharge the filtered gas into the air.

[0082] In certain embodiments provided by the present application, the residual gas after the reaction is discharged through the exhaust port 44 of the gas purifier 4, detected by the hydrogen sulfide detection alarm device 45 with a hydrogen sulfide gas detection probe, and discharged into the atmosphere through the exhaust port 44. If the hydrogen sulfide content of the exhaust gas is detected to be higher than 10ppm, the hydrogen sulfide detection alarm device 45 will alarm, indicating that the composite methyldiethanolamine purification liquid 43 has been saturated with hydrogen sulfide and the purification liquid 43 needs to be replaced.

[0083] Figure 2 A flow chart of a coating preparation method provided in this application, refer to Figure 2 The present application provides a method for preparing a coating, which is used to prepare a sampling device as described above. The sampling device includes a coating, and the coating is applied to a wall corresponding to a separation chamber. The preparation method includes:

[0084] S101: preparing a resin block.

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

[0086] S103: Mixing the resin particles with a curing agent to obtain a raw material for preparing a coating.

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

[0088] The technical effects corresponding to the sampling device can be referred to above, and will not be repeated here. The above steps can improve the density and preparation convenience of the coating, so as to increase the service life of the sampling device.

[0089] In some embodiments provided in the present application, in step S101, “preparing a resin block” may include:

[0090] The temperature is raised to a first reaction temperature, and the polyurethane resin, phenolic resin and epoxy resin are added into a reaction kettle, 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 sequentially added into the reaction kettle.

[0092] Keep warm for the first time period.

[0093] The temperature was lowered to obtain a resin mass.

[0094] The obtained coating has good quality and can effectively extend the service life of the applied sampling device.

[0095] In some embodiments provided in the present application, the value corresponding to the first reaction temperature may be any value between 75° C. and 80° C. The value corresponding to the first time period may be 1 to 3 hours. The quality of the obtained coating is good.

[0096] In certain embodiments provided in the present application, the coating is composed of the following raw materials in mass fraction: 20 parts of polyurethane resin, 50 parts of phenolic resin, 20 parts of epoxy resin, 5 parts of titanium dioxide powder, and 5 parts of silicon dioxide. The preparation method of the above coating comprises the following steps: firstly introduce nitrogen protection into a clean reactor, select 20 parts of polyurethane resin, 50 parts of phenolic resin, and 20 parts of epoxy resin according to mass fraction under stirring, and heat to 78°C while adding the materials, and then add 5 parts of titanium dioxide powder and 5 parts of silicon dioxide in sequence. And keep warm at this temperature for 2h, and start cooling after the insulation ends. Grind the obtained resin block with a grinder 4-5 times and pass through a 200 mesh sieve. Mix the curing agent to obtain the raw material of the coating. It can improve the quality of the obtained coating.

[0097] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0098] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A sampling device, characterized in that: Applicable to an oil well provided with a sampling port, wherein the crude oil in the oil well is mixed with impurity gas, the sampling device comprises: A separator, comprising 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; A sampling container, provided with a sampling cavity, a sampling channel and an airflow channel, wherein the sampling channel is used to connect the sampling cavity with the sampling port, and the sampling channel passes through the separation cavity and the peripheral wall is sealed with the separator, so that the crude oil can enter the sampling cavity through the sampling port and the sampling channel, and the airflow channel is spaced from the sampling channel and is used to connect with the separation cavity; A separator connected to the sampling channel and located in the separation chamber, wherein the width of the separator increases linearly in the extending direction of the sampling channel, and an end of the separator with a larger width faces the airflow channel; A gas purifier, wherein the purification inlet is connected to the gas outlet of the separator for discharging impurity gas.

2. The sampling device according to claim 1, characterized in that: The sampling channel and the air flow channel extend in the same direction, the separation element is connected to the sampling channel so as to surround the sampling channel, and both ends of the sampling channel extend out of the separation chamber.

3. The sampling device according to claim 2, characterized in that: The maximum width of the separator is greater than the maximum width of the air flow channel.

4. The sampling device according to any one of claims 1 to 3, characterized in that: The air flow channel and the sampling channel are both connected to the top of the sampling container, and the sampling cavity is located at the bottom of the sampling container.

5. The sampling device according to any one of claims 1 to 3, characterized in that: The sampling device also includes: A coating is applied to a wall corresponding to the separation chamber to improve the corrosion resistance of the separation chamber.

6. The sampling device according to claim 5, characterized in that: The coating comprises components of polyurethane resin, phenolic resin, epoxy resin, titanium dioxide powder and silicon dioxide, wherein the phenolic resin accounts for 45-55% and the epoxy resin accounts for 15-25%.

7. The sampling device according to any one of claims 1 to 3, characterized in that: The sampling device also includes: The flow member is connected to the sampling container and is located in the air flow channel. The flow member is provided with a plurality of impurity gas flow holes connecting the sampling cavity and the air flow channel.

8. The sampling device according to any one of claims 1 to 3, characterized in that: The gas purifier comprises: The main body is provided with a containing cavity, and the purification inlet is communicated with the containing cavity; A purification liquid is placed in the containing chamber to react with the impurity gas to remove toxic components of the impurity gas; An exhaust port, spaced apart from the purification inlet, for discharging 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 standard.

9. A method for preparing a coating, characterized in that: Applicable to preparing the sampling device according to any one of claims 1 to 8, the sampling device comprising a coating, the coating being applied to a wall corresponding to the separation chamber, the preparation method comprising: A resin block is prepared; grinding the resin mass to obtain resin particles; Mixing the resin particles with a curing agent to obtain a raw material for preparing the coating; The raw material is applied to the corresponding wall of the separation chamber to obtain the coating.

10. The preparation method according to claim 9, characterized in that: The "preparing a resin block" comprises: The reactor is heated to a first reaction temperature, and the polyurethane resin, the phenolic resin and the epoxy resin are mixed and stirred in the reactor; Under the condition of the first reaction temperature, adding titanium dioxide powder and silicon dioxide into the reaction kettle in sequence; The first heat preservation period; The temperature was lowered to obtain the resin mass.

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