A shale gas exploitation sampling device and method thereof

Abstract

The present application relates to the technical field of shale gas sampling, in particular to a shale gas exploitation sampling device and method, the device comprises a box body and an inspection door, a filter box is arranged in the upper middle part of the box body, a low-temperature box is arranged in the lower middle part of the box body, an adsorption box is arranged in one end of the box body, a shunt pipe is arranged on the inner wall of the bottom end of the low-temperature box, a cooling mechanism for low-temperature water removal is arranged in the low-temperature box, a filtering mechanism for automatic filtering and automatic cleaning is arranged in the filter box, an adsorption mechanism for adsorption is arranged in the adsorption box, and a connecting mechanism for connecting a sampling pipeline is arranged in one end of the box body. The device can be suitable for sampling pipelines of different sizes and shapes, can ensure the firmness and sealing property of the connection, can automatically sample and purify different shale gases comprehensively, and can ensure the accuracy and sufficient amount of sampling.

Description

Technical Field

[0001] This invention relates to the field of shale gas sampling technology, specifically to a shale gas extraction sampling device and method. Background Technology

[0002] Shale gas refers to natural gas of commercial value that is stored and preserved in mature, organic-rich dark mudstone or high-carbon mudstone due to the adsorption of organic matter or the presence of cracks and matrix pores in the rock. It is of biogenic, pyrolytic, or mixed origin. Sampling is an important part of shale gas extraction to obtain relevant information. Gas samples are collected from shale gas reservoirs to analyze the composition of the gas, including the content of hydrocarbon gases such as methane, ethane, and propane, as well as non-hydrocarbon gases such as carbon dioxide and nitrogen, thereby determining the quality and resource potential of the shale gas.

[0003] Currently, some existing shale gas sampling equipment lacks purification capabilities, which is a significant limitation. This forces users to perform separate purification work after sampling. Furthermore, it is impossible to control the sampling volume for different types of shale gas, thus failing to guarantee the remaining amount of shale gas after purification and wasting subsequent testing time. Summary of the Invention

[0004] The purpose of this invention is to provide a shale gas extraction sampling device and method to address the limitations of existing shale gas sampling equipment, which lacks purification capabilities and requires separate purification after sampling. Furthermore, the sampling volume cannot be controlled for different types of shale gas, resulting in insufficient residual shale gas after purification and wasted testing time. This invention is applicable to sampling pipes of different sizes and shapes, ensures secure and airtight connections, and automatically performs comprehensive sampling and purification of different types of shale gas. It guarantees accurate and sufficient sampling, allows for sample extraction as needed, simplifies the sampling process, improves user efficiency, and reduces overall project time and operating costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a shale gas extraction sampling device and method, the device comprising a housing and an inspection door, a filter box being provided in the upper middle part of the housing, a low-temperature chamber being provided in the lower middle part of the housing, an adsorption chamber being provided at one end of the housing, a diversion pipe being provided on the inner wall of the bottom end of the low-temperature chamber, an inclined inner wall being provided on the lower end of the filter box, a concentrator being provided on the inner wall of the bottom end of the filter box, a cooling mechanism for low-temperature dehydration being provided inside the low-temperature chamber, a filtration mechanism for automatic filtration and automatic cleaning being provided inside the filter box, an adsorption mechanism for adsorption being provided inside the adsorption chamber, and a connection mechanism for connecting a sampling pipeline being provided at one end of the housing.

[0006] Preferably, one end of the diversion pipe extends to the outside of the housing, a maintenance door is provided on one side of the housing, self-locking casters are evenly distributed at the bottom of the housing, and a handle is fixedly connected to one end of the housing to facilitate maintenance and movement of the device.

[0007] Preferably, the cooling mechanism includes a sliding hole, and the inner wall of the bottom of the low-temperature chamber is provided with a sliding hole. The middle and lower part of the diversion pipe is located at the top of the sliding hole. A collection pipe is symmetrically fixedly connected to the bottom of the diversion pipe. A collection pipe is slidably connected inside the sliding hole. One end of the collection pipe is connected to a sealing cap through a bearing, and the sealing cap is connected to the sliding hole through a thread. The top of the collection pipe is slidably connected to a guide plate. Symmetrical condenser pipes are evenly connected to the top of the diversion pipe, and the tops of the condenser pipes are connected to each other. The tops of the condenser pipes are all connected to a central pipe. A drain port is provided at the bottom of the low-temperature chamber. A feed port is provided in the middle of the low-temperature chamber, and one end of the feed port is connected to a liquid nitrogen tank, which can condense water vapor and heavy hydrocarbons and other impurities in shale gas into liquid or particles, thereby improving the purity of shale gas.

[0008] Preferably, the condenser tubes are all inclined, continuously upward-curved tubes, which enable the condensed liquid or particles inside the condenser tube to automatically move to the inside of the collection tube for collection.

[0009] Preferably, the filtration mechanism includes a filter plate, a dust baffle plate is fixedly connected to the inner wall of one side of the filter box, and the dust baffle plate is located at the top of the concentrator pipe. Blow holes are evenly distributed on one side of the concentrator pipe. The filter plate is slidably connected to the middle of the filter box. Four sets of supporting guide columns are evenly fixedly connected inside the filter box, and the upper middle parts of each supporting guide column are slidably connected to the four corner faces of the filter plate. Four sets of first springs are evenly fixedly connected to the top of the filter plate. A limiting column is fixedly connected to the middle of the inner wall at the bottom of the filter box, and the top of the limiting column is located at the bottom of the filter plate. A sliding column is slidably connected inside the limiting column. A top column is slidably connected at the top, and the top of the top column is in contact with the filter plate. The bottom end of the top column is fixedly connected to a sliding column. A second spring is fixedly connected to the bottom end of the sliding column, and the bottom end of the second spring is fixedly connected to the inner wall of a limiting column. A motor is provided in the middle of the limiting column, and eccentric wheels are fixedly connected to both ends of the motor. A first sliding groove is symmetrically opened in the middle of the limiting column. A downward pressure rod is slidably connected inside each of the first sliding grooves, and one end of each downward pressure rod is fixedly connected to the sliding column. The other end of each downward pressure rod is in contact with the eccentric wheel, which further improves the purity of shale gas and can also automatically clean the filter plate.

[0010] Preferably, the diameter of the lower part of the supporting guide column is larger than the diameter of the upper part. The bottom ends of the filter plates are all in contact with the lower part of the supporting guide column to support the filter plates. The top ends of the first springs are all in contact with the inner wall of the filter box. The first springs are all located on the surface of the supporting guide column. The eccentric wheels are all eccentric structures. The side of the eccentric wheel that is close to the pressure rod is arc-shaped, which can automatically press down and release the pressure rod. The control terminal of the motor is electrically connected to an external power source through an external switch to facilitate the operation of this device.

[0011] Preferably, the adsorption mechanism includes activated carbon plates and adsorption columns. A gas distribution plate is fixedly connected to the bottom of the adsorption box. A partition plate is fixedly connected to the inner wall of one side of the adsorption box, and the bottom of the partition plate is fixedly connected to the gas distribution plate. A second connecting pipe is uniformly connected to the inner wall of one end of the filter box, and the bottom of each second connecting pipe is connected to the gas distribution plate. Activated carbon plates are uniformly arranged in the upper middle part of the adsorption box. Adsorption columns are uniformly arranged in the middle part of the adsorption box, and the top of the adsorption column is fixedly connected to the bottom of the lowest set of activated carbon plates. Three sets of third connecting pipes are uniformly connected to the top of the adsorption box. A first gas pump is provided in the middle of each of the third connecting pipes. A detector is provided in the lower middle part of each of the third connecting pipes. One end of each of the third connecting pipes is connected to a sample storage bottle through a quick-release head. The control terminals of the first gas pump and the detector are electrically connected to an external power source through an external switch, which can adsorb impurities such as carbon dioxide and nitrogen in shale gas.

[0012] Preferably, the connecting mechanism includes a placement rack, with a placement rack at one end of the housing. One end of the diversion pipe is connected to a first connecting pipe, and one end of the first connecting pipe is connected to a connector. The middle part of the connector is slidably connected to the top of the placement rack. The bottom end of the connector is connected to an inner tube, and the bottom end of the inner tube is fixedly connected to a filter screen. The lower middle part of the inner tube has evenly spaced grooves, and the bottom end of each groove is connected to a spreading plate via a rotating shaft. The top end of each groove has a second sliding groove. The top end of the inner tube is threadedly connected to an internally threaded sleeve, and the bottom end of the internally threaded sleeve is connected to a rotating ring via a bearing. A movable rod is slidably connected inside each of the second sliding grooves. Furthermore, the top ends of the movable rods are all fixedly connected to the rotating rings, and the bottom ends of the movable rods are all slidably connected to the unfolding plate. An elastic air chamber is provided on the middle surface of the inner tube. A second air pump is provided at one end of the box. The output end of the second air pump is connected to a fourth connecting pipe, and one end of the fourth connecting pipe is connected to the elastic air chamber. The control end of the second air pump is electrically connected to an external power source through an external switch. Inclined grooves are symmetrically opened in the lower part of the unfolding plate. Limiting rods are slidably connected inside the grooves, and one end of each limiting rod is fixedly connected to the movable rod. This allows the device to connect sampling pipes of different sizes and shapes, while also ensuring fixation and sealing.

[0013] The operating method of this device is as follows:

[0014] Step 1: Connection. The user removes the inner tube and connector from the placement rack, inserting the inner tube and the elastic air chamber into the sampling pipe. Rotating the inner threaded sleeve, the user uses the swivel, movable rod, inclined groove, and limiting rod to make the unfolding plate abut against the inner wall of the sampling pipe, thus locking the inner tube and the sampling pipe. Then, the user starts the second air pump, which inflates the elastic air chamber through the fourth connecting pipe, thus sealing the inner tube and the sampling pipe.

[0015] Step 2: Condensation. Shale gas enters the interior of the distribution pipe through the inner pipe and the first connecting pipe. It is dispersed through the condenser. In the low-temperature environment, water vapor and heavy hydrocarbons and other impurities in the shale gas condense into liquid or particles. The upward-sloping condenser causes the condensed impurities to move downward and eventually fall into the inside of the collection pipe for collection.

[0016] Step 3: Filtration. After removing impurities such as water vapor and heavy hydrocarbons, the shale gas is ejected through the blowholes on the surface of the central pipe and filtered through the filter plates inside the filter box.

[0017] Step 4: Cleaning. The motor and eccentric wheel cause the lower pressure rod to move the sliding column and the top column downward, compressing the second spring. When the eccentric end of the eccentric wheel no longer contacts the lower pressure rod, the filter plate is suddenly struck by the second spring, the sliding column and the top column to quickly clean the impurities at the bottom of the filter plate.

[0018] Step 5: Adsorption. The filtered shale gas enters the interior of the gas distribution plate through the second connecting pipe, and finally disperses into the interior of the adsorption box through the gas distribution plate. The adsorption column and activated carbon plate inside the adsorption box adsorb impurities such as carbon dioxide and nitrogen in the shale gas. Then, the first gas pump fills the sample storage bottle with the purified shale gas for storage and transportation.

[0019] The user moves the device to the sampling pipeline. The user removes the inner tube and connector from the placement rack, inserting the inner tube into the sampling pipeline while simultaneously positioning the elastic gas chamber inside. The user rotates the internal threaded sleeve, causing the inclined groove to slide inside the limiting rod via the rotating ring and movable rod. Under the action of the inclined groove and limiting rod, the unfolding plate moves outward in a circular motion until it contacts the inner wall of the sampling pipeline, thus locking the inner tube and sampling pipeline. The user then starts the second air pump, causing the elastic gas chamber to inflate through the fourth connecting pipe, sealing the inner tube and sampling pipeline, facilitating sampling. This ensures that only shale gas can be extracted, preventing external gases from entering the inner tube. The user adds liquid nitrogen from the liquid nitrogen tank to the cryogenic chamber through the feeding port. The internal structure provides a low-temperature environment. Shale gas enters the first connecting pipe and the branch pipe through the inner pipe, undergoes initial filtration through a filter screen to prevent impurities from entering the inner pipe. Inside the branch pipe, the shale gas is dispersed through a condenser. In the low-temperature environment, water vapor and heavy hydrocarbons in the shale gas condense into liquid or particles. The upward-sloping condenser causes the condensed impurities to move downwards and eventually fall into the collection pipe for collection. A guide plate ensures that the condensed impurities enter the collection pipe. After removing water vapor and heavy hydrocarbons, the shale gas is ejected through blowholes on the surface of the central pipe and filtered through a filter plate inside the filter box. The 0.22-micron titanium alloy sintered filter plate filters out solids such as fracturing sand from the shale gas. The filter media is processed to further remove impurities from shale gas, improving its purity. Simultaneously, the motor drives an eccentric wheel to rotate. The eccentric end of the eccentric wheel causes the lower pressure rod to move the sliding column and top column downwards, compressing the second spring. When the eccentric end of the eccentric wheel no longer contacts the lower pressure rod, the second spring causes the sliding column and top column to move rapidly upwards. This causes the top column to suddenly strike the filter plate, causing it to move upwards quickly, thus rapidly cleaning impurities from the bottom of the filter plate and causing them to fall onto the inner wall of the filter box. The first spring reduces the upward movement distance of the filter plate and facilitates its automatic reset. Because the diameter of the lower part of the support guide column is larger than that of the upper part, it also supports and limits the filter plate. The eccentric wheel and the second spring... The filter plates are cleaned intermittently to ensure their filtration efficiency and maximize the removal of impurities from the shale gas. The filtered shale gas enters the gas distribution plate through a second connecting pipe, and then disperses into the adsorption chamber. Inside the adsorption chamber, adsorption columns and activated carbon plates adsorb impurities such as carbon dioxide and nitrogen. The purified shale gas is then pumped into sample storage bottles for storage and transport by a first gas pump. A detector monitors the pressure and filling volume within the sample storage bottles until the required volume is reached. This device is suitable for sampling pipes of different sizes and shapes, ensuring secure and airtight connections. It can also automatically perform comprehensive sampling and purification of various types of shale gas.It ensures accurate and sufficient sampling, and allows for sample extraction as needed. This not only facilitates the user's sampling process but also improves work efficiency and reduces overall project timelines and operating costs. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0021] Figure 2 This is a cross-sectional perspective view of the present invention;

[0022] Figure 3 This is a three-dimensional cross-sectional view of the filter box, sliding hole, and collection pipe in this invention;

[0023] Figure 4 This is a three-dimensional cross-sectional view of the box and the collection pipe in this invention;

[0024] Figure 5 This is a three-dimensional cross-sectional view of the filter plate and the limiting column in this invention;

[0025] Figure 6 This is a three-dimensional cross-sectional view of the adsorption mechanism in this invention;

[0026] Figure 7 This is a three-dimensional cross-sectional view of the box and the shelf in this invention;

[0027] Figure 8 This is a three-dimensional cross-sectional view of the connecting mechanism in this invention;

[0028] Figure 9 This is a three-dimensional cross-sectional view of the unfolding plate and the inclined groove in this invention.

[0029] In the diagram: 1. Box body; 2. Filter box; 3. Low temperature chamber; 4. Adsorption box; 5. Diverter pipe; 6. First connecting pipe; 7. Sliding hole; 8. Collection pipe; 9. Guide plate; 10. Concentrating pipe; 11. Condenser pipe; 12. Blowing hole; 13. Dust baffle plate; 14. Filter plate; 15. Support guide column; 16. First spring; 17. Limiting column; 18. Sliding column; 19. Top column; 20. Second spring; 21. Motor; 22. Eccentric wheel; 23. First sliding groove; 24. Downward pressure rod; 25. Drain port; 26. Feed port; 27. Liquid 28. Nitrogen tank; 29. ​​Gas distribution plate; 30. Divider plate; 31. Second connecting pipe; 32. Activated carbon plate; 33. Adsorption column; 34. Third connecting pipe; 35. First gas pump; 36. Detector; 37. Sample storage bottle; 38. Placement rack; 39. Connector; 40. Inner tube; 41. Filter screen; 42. Collection trough; 43. Second slide trough; 44. Development plate; 45. Movable rod; 46. Internal threaded sleeve; 47. Rotary ring; 48. Elastic gas chamber; 49. Second gas pump; 50. Fourth connecting pipe; 51. Inclined groove; 52. Limiting rod. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-9 One embodiment provided by the present invention:

[0032] A shale gas extraction sampling device and method are disclosed. The device includes a housing 1 and an inspection door. A filter box 2 is provided in the upper middle part of the housing 1, a low-temperature box 3 is provided in the lower middle part of the housing 1, and an adsorption box 4 is provided at one end of the housing 1. A diversion pipe 5 is provided on the inner wall of the bottom end of the low-temperature box 3. The inner wall of the bottom end of the filter box 2 is inclined. A central pipe 10 is provided on the inner wall of the bottom end of the filter box 2. A cooling mechanism for low-temperature dehydration is provided inside the low-temperature box 3. A filtration mechanism for automatic filtration and automatic cleaning is provided inside the filter box 2. An adsorption mechanism for adsorption is provided inside the adsorption box 4. A connection mechanism for connecting a sampling pipeline is provided at one end of the housing 1.

[0033] Please see Figures 2-4In this embodiment, the cooling mechanism includes a sliding hole 7. A sliding hole 7 is provided on the inner wall of the bottom of the low-temperature chamber 3. The lower middle part of the diversion pipe 5 is located at the top of the sliding hole 7. A collecting pipe 8 is symmetrically fixedly connected to the bottom of the diversion pipe 5. The collecting pipe 8 is slidably connected inside the sliding hole 7. One end of the collecting pipe 8 is connected to a sealing cap via a bearing, and the sealing cap is threaded to the sliding hole 7. The top of the collecting pipe 8 is slidably connected to a guide plate 9. Symmetrical condensing pipes 11 are evenly connected to the top of the diversion pipe 5, and the tops of the condensing pipes 11 are interconnected. The tops of all condensing pipes 11 are connected to a central pipe 10. A drain port 25 is provided at the bottom of the low-temperature chamber 3. A feeding port 26 is provided in the middle of the low-temperature chamber 3, and one end of the feeding port 26 is connected to a liquid nitrogen tank 27. The user adds liquid nitrogen from the liquid nitrogen tank 27 into the interior of the low-temperature chamber 3 through the feeding port 26, thereby providing a low-temperature environment. Shale gas enters the interior of the first connecting pipe 6 and the diversion pipe 5 through the inner pipe 39. The filter screen 40 performs the initial filtration to prevent impurities in the shale gas from entering the inner pipe 39. The shale gas inside the diversion pipe 5 is dispersed through the condenser pipe 11. In a low-temperature environment, water vapor and heavy hydrocarbons and other impurities in the shale gas condense into liquid or particles. The condensed impurities move downwards through the inclined and continuously upward-pointing condenser pipe 11 and eventually fall into the collection pipe 8 for collection. The guide plate 9 ensures that the condensed impurities enter the collection pipe 8. When the user needs to remove the impurities, the user rotates the sealing cap at one end of the collection pipe 8 and then pulls out the collection pipe 8. After cleaning the inner wall of the collection pipe 8, the user puts it back in its original position and seals it again with the sealing cap. The guide plate 9 guides and positions the collection pipe 8 so that the open end of the collection pipe 8 is facing upwards, ensuring that impurities can be collected and preventing impurities from leaking out. It can condense water vapor and heavy hydrocarbons and other impurities in the shale gas into liquid or particles, thereby improving the purity of the shale gas.

[0034] Please see Figures 2-5In this embodiment, the filtration mechanism includes a filter plate 14. A dust baffle 13 is fixedly connected to the inner wall of one side of the filter box 2, and the dust baffle 13 is located at the top of the concentrator 10. Blow holes 12 are evenly opened on one side of the concentrator 10. The filter plate 14 is slidably connected to the middle of the filter box 2. Four sets of support guide columns 15 are evenly fixedly connected inside the filter box 2, and the upper middle part of each support guide column 15 is slidably connected to the four corners of the filter plate 14. Four sets of first springs 16 are evenly fixedly connected to the top of the filter plate 14. A limiting column 17 is fixedly connected to the middle of the inner wall at the bottom of the filter box 2, and the top of the limiting column 17 is located at the bottom of the filter plate 14. A sliding column 18 is slidably connected inside the limiting column 17. A top column 19 is slidably connected to the end of the filter plate 14, and the top end of the top column 19 is in contact with the filter plate 14. The bottom end of the top column 19 is fixedly connected to the sliding column 18. A second spring 20 is fixedly connected to the bottom end of the sliding column 18, and the bottom end of the second spring 20 is fixedly connected to the inner wall of the limiting column 17. A motor 21 is provided in the middle of the limiting column 17, and eccentric wheels 22 are fixedly connected to both ends of the motor 21. A first sliding groove 23 is symmetrically opened in the middle of the limiting column 17. A downward pressure rod 24 is slidably connected inside the first sliding groove 23, and one end of the downward pressure rod 24 is fixedly connected to the sliding column 18. The other end of the downward pressure rod 24 is in contact with the eccentric wheel 22. The shale gas, after removing impurities such as water vapor and heavy hydrocarbons, is blown through the surface of the central pipe 10. The gas is ejected from hole 12 and filtered through filter plate 14 inside filter box 2. The 0.22-micron titanium alloy sintered filter plate 14 filters out solid particles such as fracturing sand from the shale gas, further removing impurities and improving its purity. Simultaneously, motor 21 drives eccentric wheel 22 to rotate. The eccentric end of eccentric wheel 22 causes the lower pressure rod 24 to slide downwards. The lower pressure rod 24 drives sliding column 18 and top column 19 to move downwards, compressing the second spring 20 through sliding column 18. When the eccentric end of eccentric wheel 22 no longer contacts the lower pressure rod 24, the second spring 20 causes sliding column 18 and top column 19 to move rapidly upwards, thus causing the top column 19 to press against filter plate 14. A sudden tap causes the filter plate 14 to move rapidly upwards, quickly clearing impurities from the bottom and causing them to fall onto the inner wall of the filter box 2. The guide column 15 limits and guides the movement of the filter plate 14. The first spring 16 reduces the upward movement distance of the filter plate 14 and facilitates its automatic reset. Since the diameter of the lower part of the guide column 15 is larger than that of the upper part, it also supports and limits the movement of the filter plate 14. The eccentric wheel 22 and the second spring 20 clean the filter plate 14 intermittently, ensuring the filtration effect of the filter plate 14, maximizing the filtration of impurities in the shale gas, further improving the purity of the shale gas, and automatically cleaning the filter plate 14.

[0035] Please see Figure 2 and Figure 6In this embodiment, the adsorption mechanism includes activated carbon plates 31 and adsorption columns 32. A gas distribution plate 28 is fixedly connected to the bottom of the adsorption box 4. A partition plate 29 is fixedly connected to the inner wall of one side of the adsorption box 4, and the bottom of the partition plate 29 is fixedly connected to the gas distribution plate 28. A second connecting pipe 30 is uniformly connected to the inner wall of one end of the filter box 2, and the bottom of each of the second connecting pipes 30 is connected to the gas distribution plate 28. Activated carbon plates 31 are uniformly arranged in the upper middle part of the adsorption box 4. Adsorption columns 32 are uniformly arranged in the middle part of the adsorption box 4, and the top of the adsorption column 32 is fixedly connected to the bottom of the lowest set of activated carbon plates 31. Three sets of third connecting pipes 33 are uniformly connected to the top of the adsorption box 4. A first air pump 34 is provided in the middle of each of the third connecting pipes 33, and a first air pump 34 is provided in the lower middle part of each of the third connecting pipes 33. The sample storage bottle 36 is connected to one end of the detector 35 and the third connecting tube 33 via a quick-release connector. The control terminals of the first air pump 34 and the detector 35 are electrically connected to an external power supply via an external switch. The filtered shale gas enters the interior of the gas distribution plate 28 through the second connecting tube 30, and finally disperses into the interior of the adsorption box 4 through the gas distribution plate 28. The adsorption column 32 and activated carbon plate 31 inside the adsorption box 4 adsorb impurities such as carbon dioxide and nitrogen in the shale gas. Then, the first air pump 34 fills the sample storage bottle 36 with the purified shale gas for storage and transportation. The detector 35 can detect the pressure inside the sample storage bottle 36 and the filling volume until the required volume is reached. It can adsorb impurities such as carbon dioxide and nitrogen in the shale gas.

[0036] Please see Figure 2 , Figures 6-9In this embodiment, the connecting mechanism includes a placement rack 37. A placement rack 37 is provided at one end of the housing 1. One end of the diversion pipe 5 is connected to a first connecting pipe 6. One end of the first connecting pipe 6 is connected to a connector 38, and the middle part of the connector 38 is slidably connected to the top of the placement rack 37. The bottom end of the connector 38 is connected to an inner tube 39. A filter screen 40 is fixedly connected to the bottom end of the inner tube 39. Grooves 41 are evenly distributed in the lower middle part of the inner tube 39. The bottom end of each groove 41 is connected to an unfolding plate 43 via a rotating shaft. A second sliding groove 42 is provided at the top end of each groove 41. The top end of the inner tube 39 is connected to a screw... The inner tube 39 is connected to an internally threaded sleeve 45. A rotating ring 46 is connected to the bottom end of the internally threaded sleeve 45 via a bearing. Movable rods 44 are slidably connected inside the second sliding groove 42, with the top ends of the movable rods 44 fixedly connected to the rotating ring 46 and the bottom ends of the movable rods 44 slidably connected to the unfolding plate 43. An elastic air chamber 47 is provided on the middle surface of the inner tube 39. A second air pump 48 is provided at one end of the housing 1. The output end of the second air pump 48 is connected to a fourth connecting pipe 49, with one end of the fourth connecting pipe 49 connected to the elastic air chamber 47. The control end of the second air pump 48 is connected to an external power source via an external switch. The power supply is connected, and the lower part of the unfolding plate 43 is symmetrically provided with inclined grooves 50. Each inclined groove 50 is slidably connected to a limiting rod 51, and one end of each limiting rod 51 is fixedly connected to a movable rod 44. The user removes the inner tube 39 and connector 38 from the placement rack 37, allowing the inner tube 39 to be inserted into the sampling pipe, simultaneously placing the elastic air chamber 47 inside the sampling pipe. The user rotates the internal threaded sleeve 45, which drives the rotating ring 46 and movable rod 44 to move downwards. The rotating ring 46 and movable rod 44 cause the inclined grooves 50 to slide inside the limiting rods 51. Due to the inclined grooves... The groove 50 is inclined outwards, so under the action of the inclined groove 50 and the limiting rod 51, the unfolding plate 43 moves outwards in a circular motion until the unfolding plate 43 abuts against the inner wall of the sampling pipe, thereby locking the inner tube 39 and the sampling pipe. Then the user starts the second air pump 48, which causes the elastic air chamber 47 to inflate through the fourth connecting pipe 49, thereby sealing the inner tube 39 and the sampling pipe, thus facilitating the user's sampling work and preventing external gas from entering the inner tube 39. This allows the device to connect sampling pipes of different sizes and shapes, and also ensures fixation and sealing.

[0037] It should be noted that one end of the diversion pipe 5 extends to the outside of the box 1, and an inspection door is provided on one side of the box 1. Self-locking casters are evenly arranged at the bottom of the box 1, and a handle is fixedly connected to one end of the box 1 to facilitate the maintenance and movement of this device. The condenser pipes 11 are all inclined and continuously upward curved pipes, which can make the liquid or particles condensed inside the condenser pipes 11 automatically move to the inside of the collection pipe 8 for collection. The diameter of the lower part of the support guide column 15 is larger than the diameter of the upper part. The bottom ends of the filter plates 14 are all in contact with the lower part of the support guide column 15 to support the filter plates 14. The top ends of the first springs 16 are all in contact with the inner wall of the filter box 2. The first springs 16 are all located on the surface of the support guide column 15. The eccentric wheels 22 are all eccentric structures. The side of the eccentric wheel 22 that is close to the pressure rod 24 is arc-shaped, which can automatically press down and release the pressure rod 24. The control end of the motor 21 is electrically connected to the external power supply through an external switch to facilitate the operation of this device.

[0038] The device operates as follows:

[0039] Step 1: Connection. The user removes the inner tube 39 and connector 38 from the placement rack 37, allowing the inner tube 39 and the elastic air chamber 47 to be inserted into the sampling pipe. The user rotates the inner threaded sleeve 45, and through the rotating ring 46, movable rod 44, inclined groove 50 and limiting rod 51, the unfolding plate 43 comes into contact with the inner wall of the sampling pipe, which can lock the inner tube 39 and the sampling pipe. Then the user starts the second air pump 48, which causes the elastic air chamber 47 to inflate through the fourth connecting pipe 49, which can seal the inner tube 39 and the sampling pipe.

[0040] Step 2: Condensation. Shale gas enters the interior of the diversion pipe 5 through the inner pipe 39 and the first connecting pipe 6. It is dispersed through the condenser pipe 11. Under low temperature conditions, water vapor and heavy hydrocarbons and other impurities in the shale gas condense into liquid or particles. The condensed impurities move downward through the upward-sloping condenser pipe 11 and eventually fall into the collection pipe 8 for collection.

[0041] Step 3: Filtration. After removing impurities such as water vapor and heavy hydrocarbons, the shale gas is ejected through the blowhole 12 on the surface of the central pipe 10 and filtered through the filter plate 14 inside the filter box 2.

[0042] Step 4: Cleaning. The motor 21 and eccentric wheel 22 cause the pressure rod 24 to move the sliding column 18 and the top column 19 downward, compressing the second spring 20. When the eccentric end of the eccentric wheel 22 no longer contacts the pressure rod 24, the filter plate 14 is suddenly struck by the second spring 20, the sliding column 18 and the top column 19, which quickly cleans the impurities at the bottom of the filter plate 14.

[0043] Step 5: Adsorption. The filtered shale gas enters the interior of the gas distribution plate 28 through the second connecting pipe 30, and finally disperses into the interior of the adsorption box 4 through the gas distribution plate 28. The adsorption column 32 and activated carbon plate 31 inside the adsorption box 4 adsorb impurities such as carbon dioxide and nitrogen in the shale gas. Then, the first gas pump 34 fills the sample storage bottle 36 with the purified shale gas for storage and transportation.

[0044] The user moves the device to the sampling pipe. The user removes the inner tube 39 and connector 38 from the placement rack 37, inserting the inner tube 39 into the sampling pipe. Simultaneously, the elastic air chamber 47 is positioned inside the sampling pipe. The user rotates the internal threaded sleeve 45, causing the rotating ring 46 and movable rod 44 to move downwards. The rotating ring 46 and movable rod 44 cause the inclined groove 50 to slide inside the limiting rod 51. Since the inclined groove 50 is inclined outwards, the unfolding plate 43 moves outwards in a circular motion under the action of the inclined groove 50 and the limiting rod 51 until the unfolding plate 43 contacts the inner wall of the sampling pipe, thus locking the inner tube 39 and the sampling pipe. Then, the user starts the second air pump 48, which, through the fourth connecting pipe 49, causes the elastic air chamber 47 to... The bulge seals the inner tube 39 and sampling pipe, facilitating sampling and preventing external gases from entering the inner tube 39. The user adds liquid nitrogen from the liquid nitrogen tank 27 into the cryogenic chamber 3 through the feed port 26, providing a cryogenic environment. Shale gas enters the first connecting pipe 6 and the branch pipe 5 through the inner tube 39, undergoing initial filtration through the filter screen 40 to prevent impurities from entering the inner tube 39. The shale gas inside the branch pipe 5 is dispersed through the condenser pipe 11. In the cryogenic environment, water vapor and heavy hydrocarbons in the shale gas condense into liquid or particles. The upward-sloping condenser pipe 11 causes the condensed impurities to move downwards, eventually falling into the collection pipe 8 for collection. The guide plate 9 ensures... Condensed impurities enter the interior of collection pipe 8. When the user needs to remove the impurities, the user rotates the sealing cap at one end of collection pipe 8 and then pulls out collection pipe 8. After cleaning the inner wall of collection pipe 8, the user puts it back in its original position and seals it again with the sealing cap. The guide plate 9 guides and positions collection pipe 8 so that the open end of collection pipe 8 faces upward, ensuring that impurities can be collected and preventing leakage. Shale gas, after removing impurities such as water vapor and heavy hydrocarbons, is ejected through the blowhole 12 on the surface of the central pipe 10 and filtered through the filter plate 14 inside the filter box 2. The 0.22-micron titanium alloy sintered filter plate 14 can filter out solid particles such as fracturing sand in shale gas, further removing impurities in shale gas and improving the purity of shale gas. Simultaneously, motor 21 drives eccentric wheel 22 to rotate. The eccentric end of eccentric wheel 22 causes the lower pressure rod 24 to slide downwards. The lower pressure rod 24 then drives sliding column 18 and top column 19 to move downwards. Sliding column 18 compresses the second spring 20. When the eccentric end of eccentric wheel 22 no longer contacts the lower pressure rod 24, the second spring 20 causes sliding column 18 and top column 19 to move upwards rapidly. This causes top column 19 to suddenly strike filter plate 14, causing it to move upwards quickly, thus rapidly cleaning impurities from the bottom of filter plate 14. The impurities fall onto the inner wall of filter box 2. The support guide column 15 limits and guides the movement of filter plate 14, while the first spring 16 reduces the upward movement distance of filter plate 14.Simultaneously, it facilitates the automatic reset of the filter plate 14. Since the diameter of the lower part of the support guide column 15 is larger than that of the upper part, it can also support and limit the filter plate 14. The eccentric wheel 22 and the second spring 20 can clean the filter plate 14 intermittently, thereby ensuring the filtration effect of the filter plate 14 and maximizing the filtration of impurities in the shale gas. The filtered shale gas enters the interior of the gas distribution plate 28 through the second connecting pipe 30, and finally disperses into the interior of the adsorption box 4 through the gas distribution plate 28. The adsorption column 32 and the activated carbon plate 31 inside the adsorption box 4 adsorb impurities such as carbon dioxide and nitrogen in the shale gas, and then pass through the first The air pump 34 fills the sample storage bottle 36 with purified shale gas for storage and transportation. The detector 35 monitors the pressure and filling volume inside the sample storage bottle 36 until the required volume is reached. This device is suitable for sampling pipes of different sizes and shapes, ensuring a secure and airtight connection. It can automatically perform comprehensive sampling and purification of different types of shale gas, guaranteeing accurate and sufficient sampling. It can also extract samples as needed, facilitating user sampling, improving work efficiency, and reducing overall project timelines and operating costs.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A shale gas extraction sampling device, comprising a housing (1) and an inspection door, characterized in that, A filter box (2) is provided in the upper middle part of the box (1), a low temperature box (3) is provided in the lower middle part of the box (1), an adsorption box (4) is provided at one end of the box (1), a diversion pipe (5) is provided on the inner wall of the bottom end of the low temperature box (3), the inner wall of the bottom end of the filter box (2) is inclined, a central pipe (10) is provided on the inner wall of the bottom end of the filter box (2), a cooling mechanism for low temperature water removal is provided inside the low temperature box (3), a filtration mechanism for automatic filtration and automatic cleaning is provided inside the filter box (2), an adsorption mechanism for adsorption is provided inside the adsorption box (4), and a connection mechanism for connecting the sampling pipe is provided at one end of the box (1). The cooling mechanism includes a sliding hole (7). The inner wall of the bottom of the low temperature chamber (3) is provided with a sliding hole (7). The middle and lower part of the diversion pipe (5) is located at the top of the sliding hole (7). The bottom of the diversion pipe (5) is symmetrically fixedly connected with a collection pipe (8). The inside of the sliding hole (7) is slidably connected with a collection pipe (8). One end of the collection pipe (8) is connected to a sealing cap through a bearing. The top of the collection pipe (8) is slidably connected to a guide plate (9). The top of the diversion pipe (5) is evenly connected with symmetrical condenser pipes (11). The top of each condenser pipe (11) is connected to a central pipe (10). The bottom of the low temperature chamber (3) is provided with a drain port (25). The middle of the low temperature chamber (3) is provided with a feeding port (26). The filtration mechanism includes a filter plate (14), a dust baffle plate (13) is fixedly connected to the inner wall of one side of the filter box (2), blow holes (12) are evenly opened on one side of the central pipe (10), the filter plate (14) is slidably connected to the middle of the filter box (2), four sets of supporting guide columns (15) are evenly fixedly connected inside the filter box (2), four sets of first springs (16) are evenly fixedly connected to the top of the filter plate (14), and a limit column (17) is fixedly connected to the middle of the inner wall at the bottom of the filter box (2). The limiting post (17) is slidably connected to a sliding post (18), the top of the limiting post (17) is slidably connected to a top post (19), the bottom of the sliding post (18) is fixedly connected to a second spring (20), the middle of the limiting post (17) is provided with a motor (21), the two ends of the motor (21) are fixedly connected to an eccentric wheel (22), the middle of the limiting post (17) is symmetrically provided with a first sliding groove (23), and the inside of the first sliding groove (23) is slidably connected to a lower pressure rod (24). The adsorption mechanism includes an activated carbon plate (31) and an adsorption column (32). A gas distribution plate (28) is fixedly connected to the bottom of the adsorption box (4). A partition plate (29) is fixedly connected to the inner wall of one side of the adsorption box (4). A second connecting pipe (30) is uniformly connected to the inner wall of one end of the filter box (2). Activated carbon plates (31) are uniformly arranged in the upper middle part of the adsorption box (4). Adsorption columns (32) are uniformly arranged in the middle part of the adsorption box (4). Three sets of third connecting pipes (33) are uniformly connected to the top of the adsorption box (4). A first air pump (34) is provided in the middle of each of the third connecting pipes (33). A detector (35) is provided in the lower middle part of each of the third connecting pipes (33). A sample storage bottle (36) is connected to one end of each of the third connecting pipes (33) through a quick-release head. The connecting mechanism includes a placement rack (37), one end of the housing (1) is provided with a placement rack (37), one end of the diversion pipe (5) is connected to a first connecting pipe (6), one end of the first connecting pipe (6) is connected to a connector (38), the bottom end of the connector (38) is connected to an inner tube (39), the bottom end of the inner tube (39) is fixedly connected to a filter screen (40), the lower middle part of the inner tube (39) is evenly provided with a collection groove (41), the bottom end of each collection groove (41) is connected to an unfolding plate (43) through a rotating shaft, the top end of each collection groove (41) is provided with a second sliding groove (42), and the top end of the inner tube (39) is connected to a threaded section. The inner threaded sleeve (45) is connected, and the bottom end of the inner threaded sleeve (45) is connected to a swivel ring (46) through a bearing. The interior of the second slide groove (42) is slidably connected to a movable rod (44), and the bottom end of the movable rod (44) is slidably connected to the unfolding plate (43). The middle surface of the inner tube (39) is provided with an elastic air chamber (47). One end of the box (1) is provided with a second air pump (48), and the output end of the second air pump (48) is connected to a fourth connecting pipe (49). The lower part of the unfolding plate (43) is symmetrically provided with inclined grooves (50), and the interior of the inclined grooves (50) is slidably connected to a limit rod (51).

2. The shale gas extraction sampling device according to claim 1, characterized in that: One end of the diversion pipe (5) extends to the outside of the box (1). A maintenance door is provided on one side of the box (1). Self-locking casters are evenly provided at the bottom of the box (1). A handle is fixedly connected to one end of the box (1).

3. A shale gas extraction sampling device according to claim 2, characterized in that: The sealing cap is connected to the sliding hole (7) by a thread, the top ends of the condenser tubes (11) are connected to each other, and one end of the feed port (26) is connected to a liquid nitrogen tank (27).

4. A shale gas extraction sampling device according to claim 3, characterized in that: The condenser tubes (11) are all inclined, continuously upward-curving bends.

5. A shale gas extraction sampling device according to claim 4, characterized in that: The dust baffle (13) is located at the top of the central pipe (10). The upper middle part of the support guide column (15) is slidably connected to the four corners of the filter plate (14). The top of the limiting column (17) is located at the bottom of the filter plate (14). The top of the top column (19) is in contact with the filter plate (14). The bottom of the top column (19) is fixedly connected to the sliding column (18). The bottom of the second spring (20) is fixedly connected to the inner wall of the limiting column (17). One end of the pressing rod (24) is fixedly connected to the sliding column (18). The other end of the pressing rod (24) is in contact with the eccentric wheel (22).

6. A shale gas extraction sampling device according to claim 5, characterized in that: The diameter of the lower part of the support guide column (15) is larger than that of the upper part. The bottom ends of the filter plates (14) are all in contact with the lower part of the support guide column (15). The top ends of the first springs (16) are all in contact with the inner wall of the filter box (2). The first springs (16) are all located on the surface of the support guide column (15). The eccentric wheels (22) are all eccentric structures. The side of the eccentric wheel (22) that is close to the lower pressure rod (24) is arc-shaped. The control end of the motor (21) is electrically connected to the external power supply through an external switch.

7. A shale gas extraction sampling device according to claim 6, characterized in that: The bottom end of the partition plate (29) is fixedly connected to the gas distribution plate (28), the bottom end of the second connecting pipe (30) is connected to the gas distribution plate (28), the top end of the adsorption column (32) is fixedly connected to the bottom end of the lowest set of activated carbon plates (31), and the control terminals of the first air pump (34) and the detector (35) are electrically connected to an external power source through an external switch.

8. A shale gas extraction sampling device according to claim 7, characterized in that: The middle part of the connector (38) is slidably connected to the top of the placement rack (37), the top of the movable rod (44) is fixedly connected to the rotating ring (46), one end of the fourth connecting pipe (49) is connected to the elastic air chamber (47), the control end of the second air pump (48) is electrically connected to the external power supply through an external switch, and one end of the limiting rod (51) is fixedly connected to the movable rod (44).

9. A method for operating the sampling device for shale gas development as described in claim 8, characterized in that: Step 1: Connection. The user removes the inner tube (39) and connector (38) from the placement rack (37), allowing the inner tube (39) and the elastic air chamber (47) to be inserted into the sampling pipe. The user rotates the inner threaded sleeve (45), and through the swivel ring (46), movable rod (44), inclined groove (50), and limit rod (51), the unfolding plate (43) comes into contact with the inner wall of the sampling pipe, which can lock the inner tube (39) and the sampling pipe. Then the user starts the second air pump (48), which causes the elastic air chamber (47) to bulge through the fourth connecting pipe (49), which can seal the inner tube (39) and the sampling pipe. Step 2: Condensation. Shale gas enters the interior of the diversion pipe (5) through the inner pipe (39) and the first connecting pipe (6), and is dispersed through the condenser pipe (11). Under low temperature conditions, water vapor and heavy hydrocarbon impurities in the shale gas condense into liquid or particles. The condensed impurities move downward through the upward-sloping condenser pipe (11) and eventually fall into the collection pipe (8) for collection. Step 3: Filtration. After removing water vapor and heavy hydrocarbon impurities, the shale gas is sprayed out through the blowhole (12) on the surface of the central pipe (10) and filtered through the filter plate (14) inside the filter box (2). Step 4: Cleaning. The motor (21) and eccentric wheel (22) cause the pressure rod (24) to drive the sliding column (18) and top column (19) to move downward and compress the second spring (20). When the eccentric end of the eccentric wheel (22) no longer abuts against the pressure rod (24), the filter plate (14) is suddenly struck by the second spring (20), sliding column (18) and top column (19) to quickly clean the impurities at the bottom of the filter plate (14). Step 5: Adsorption. The filtered shale gas enters the interior of the gas distribution plate (28) through the second connecting pipe (30), and finally disperses into the interior of the adsorption box (4) through the gas distribution plate (28). The adsorption column (32) and activated carbon plate (31) inside the adsorption box (4) adsorb carbon dioxide and nitrogen impurities in the shale gas. Then, the impurity-removed shale gas is injected into the sample storage bottle (36) for storage and transportation by the first gas pump (34).

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