While-drilling quantitative gas taking device for shale oil and gas

Abstract

The invention relates to the technical field of petroleum and natural gas logging, in particular to a shale oil gas while-drilling quantitative gas taking device which comprises a support, the support is provided with two layers of support plates and a support body, the two layers of support plates are the first layer of support plate and the second layer of support plate respectively, and the first layer of support plate is provided with a height adjusting assembly; the height adjusting assembly comprises a moving plate, a vacuum pump is installed on the first layer of support plate, an annular environment-friendly box is installed on the moving plate, a transparent detection box is installed on the second layer of support plate, a gas collection tank is installed above the transparent detection box, the annular environment-friendly box is arranged above the gas collection tank, and a water tank is arranged on one side of the transparent detection box. According to the device provided by the invention, the rock core sample is placed in the transparent detection box, the vacuum pump is used for creating a negative pressure state, the gas emitted by the rock core sample is used for pressing the water in the gas collection tank into the water tank, and the transparent detection box is used for monitoring the state of bubbles emitted by the rock core sample, so that data support is provided for judging the development strength of the lamellar fracture.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas logging, and particularly relates to a shale oil and gas while-drilling quantitative gas taking device. BACKGROUND

[0002] Rock gas refers to natural gas contained in shale layers, and is mainly composed of methane, which is a clean and efficient energy resource and chemical raw material, and is mainly used for residential gas, urban heating, power generation, automobile fuel and chemical production, and has a wide range of uses. Before shale gas exploitation, in order to better judge the performance of shale reservoirs, after core sampling, the core is subjected to water immersion experiment. Through the field core water immersion experiment, the reservoir performance of the shale reservoir can be directly judged. The frequency of gas bubbles escaping from the surface of the core can reflect the development strength of the shale seam. The conventional experimental method is to place the shale core just out of the well into a common fish tank containing water after cleaning, and use a mobile phone or other recording device to shoot a video of the gas remaining in the shale core escaping along the surface of the core to form bubbles.

[0003] Based on the search of the above-mentioned data, it can be seen that the existing shale water immersion experiment device is relatively simple, the picture clarity is poor, and the effused gas cannot be effectively collected. Therefore, in view of the above shortcomings, a shale oil and gas while-drilling quantitative gas taking device is provided. SUMMARY

[0004] The purpose of the present application is to provide a shale oil and gas while-drilling quantitative gas taking device to overcome the problem that the existing shale water immersion experiment device is relatively simple, the picture clarity is poor, and the effused gas cannot be effectively collected.

[0005] In order to achieve the above-mentioned purpose, the present application provides a shale oil and gas while-drilling quantitative gas taking device, which comprises: A support is provided with two layers of support plates and a support body, the support body and the two layers of support plates are of an integrated structure, the two layers of support plates are respectively a first layer of support plate and a second layer of support plate, the top end of the support body is provided with the first layer of support plate, the bottom end of the support body is provided with the second layer of support plate, the first layer of support plate is provided with a connecting hole, the first layer of support plate is provided with a height adjusting assembly through the connecting hole, the height adjusting assembly comprises a moving plate, the upper and lower ends of the moving plate are respectively provided with the first layer of support plate and the second layer of support plate, the moving plate is movable, a vacuum pump is installed on the first layer of support plate, a ring-shaped environmental protection box is installed on the moving plate, the vacuum pump and the ring-shaped environmental protection box are communicated through a metal hose, a transparent detection box is installed on the second layer of support plate, a gas collecting tank is installed above the transparent detection box, the gas collecting tank is above the ring-shaped environmental protection box, the inside of the gas collecting tank and the ring-shaped environmental protection box are communicated through a second pipeline, and a water tank is arranged on one side of the transparent detection box, and the water tank and the transparent detection box are communicated through a third pipeline.

[0006] Preferably, the transparent detection box includes a box body and a box cover. The box cover is fastened to the box body. The top of the box cover is connected to a movable plate via a connecting rod. The top of the box cover is provided with a stepped positioning hole. The bottom of the inner cavity of the box cover is provided with six assembly holes. A rock cuttings container is installed inside the assembly holes. The six assembly holes are connected to the stepped positioning hole via air guide channels. An air guide ring is rotatably installed inside the stepped positioning hole. The top of the air guide ring is connected to the bottom of the gas collection container via a first pipe.

[0007] Preferably, control valves are installed on both the first and second pipes, the gas collecting tank is provided with metering scale lines on the outside, and the inner diameter of the assembly hole is adapted to the outer diameter of the rock cuttings tank.

[0008] Preferably, the height adjustment assembly includes a fixed plate, the top of which is rotatably connected to a single-threaded rod via a bearing. The single-threaded rod has an external thread and passes through and is threadedly connected to a movable plate. The top end of the single-threaded rod passes through a first-layer support plate, and a rotating head is installed at the top end of the single-threaded rod. The top of the movable plate is connected to two auxiliary rods, and the two ends of the two auxiliary rods are respectively connected to the first-layer support plate and the fixed plate.

[0009] Preferably, the fixed plate is fixedly installed on the inner side of the bracket body, the movable plate is installed above the fixed plate, and one side of the movable plate slides in contact with the outer surface of the inner side of the bracket body.

[0010] Preferably, the top of the movable plate is provided with a through hole, and the bottom of the annular protective box is provided with a positioning ring, which is adapted to the through hole.

[0011] Preferably, a lighting lamp and an ultraviolet lamp are installed on the lower inner side of the bracket body, and one side of the lighting lamp is an ultraviolet lamp.

[0012] Preferably, the bottom of the outer surface of the front side of the box is provided with a horizontal scale line, and both sides of the outer surface of the front side of the box are provided with vertical scale lines.

[0013] Preferably, the cover includes a cover plate and a housing, the assembly hole is formed through the bottom of the housing, the cover plate is bonded and fixed to the housing, the outer periphery of the air guide ring is connected to a rubber sealing ring, air guide holes are formed on the air guide ring and the rubber sealing ring, the air guide channel is formed on the opposite side of the cover plate and the housing, and the air guide holes are adapted to the air guide channel.

[0014] Preferably, an embedding frame is installed at the bottom of the housing, and an embedding groove is provided at the top of the box body. The embedding frame is adapted to the embedding groove, and a rubber pad is installed at the bottom of the inner cavity of the embedding groove.

[0015] Preferably, a pad is installed at the bottom of the inner cavity of the box, and the top of the pad is provided with a blind hole adapted to the cuttings container. The top of the pad is connected to the core frame.

[0016] Preferably, a blue background panel is installed on the back of the inner cavity of the box.

[0017] The present invention has the following beneficial effects: The shale oil and gas quantitative gas extraction device provided by this invention, through the setup of a vacuum pump, an annular protective box, a gas collection tank, a transparent detection box, and a water tank, allows for effective gas collection after the core sample is placed in the transparent detection box. A negative pressure is created using the vacuum pump to force water into the gas collection tank. Then, the gas escaping from the core sample forces the water in the gas collection tank into the water tank. The annular protective box also protects the vacuum pump from water ingress, enabling effective gas collection. It allows for accurate determination of gas content and monitoring of the escaping gas bubbles from the core sample via the transparent detection box, providing data support for assessing the development and strength of shale fractures. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the shale oil and gas quantitative gas extraction device during drilling, according to an embodiment of the present invention. Figure 2 This is a left view of the cover plate, shell, and internal structure of the box according to an embodiment of the present invention; Figure 3 This is a top view of the shell structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the movable plate, through hole, positioning ring and annular protective box in an embodiment of the present invention.

[0019] Legend: 1. Bracket; 2. Transparent detection box; 3. Gas collection tank; 4. Box body; 5. Box cover; 6. Stepped positioning hole; 7. Assembly hole; 8. Gas guide channel; 9. Gas guide ring; 10. First pipe; 11. Blue background plate; 12. Height adjustment component; 13. Annular protective box; 14. Vacuum pump; 15. Metal hose; 16. Second pipe; 17. Control valve; 18. Water tank; 19. Third pipe; 20. Rock cuttings container; 21. Moving plate; 2. Fixed plate; 23. Single-threaded rod; 24. Rotating head; 25. Auxiliary rod; 26. Through hole; 27. Positioning ring; 28. Lighting lamp; 29. ​​Ultraviolet lamp; 30. Horizontal scale line; 31. Vertical scale line; 32. Measuring scale line; 33. Cover plate; 34. Housing; 35. Rubber sealing ring; 36. Air vent; 37. Embedded frame; 38. Embedded groove; 39. Rubber pad; 40. Pad plate; 41. Blind hole; 42. Core frame. Detailed Implementation

[0020] 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.

[0021] like Figures 1 to 4 As shown, the present invention provides a shale oil and gas drilling quantitative gas extraction device, comprising: The bracket 1 comprises two support plates and a bracket body, which are integrated into one unit. The two support plates are designated as a first support plate and a second support plate. The first support plate is mounted on the top of the bracket body, and the second support plate is mounted on the bottom. The first support plate has connecting holes through which a height adjustment assembly 12 is mounted. The height adjustment assembly 12 includes a movable plate 21, with the first and second support plates positioned at its upper and lower ends, respectively. The device is movable. A vacuum pump 14 is installed on the first layer support plate, and an annular environmental protection box 13 is installed on the movable plate 21. The vacuum pump 14 and the annular environmental protection box 13 are connected by a metal flexible hose 15. A transparent detection box 2 is installed on the second layer support plate. A gas collecting tank 3 is installed above the transparent detection box 2. The annular environmental protection box 13 is located above the gas collecting tank 3. The interiors of the gas collecting tank 3 and the annular environmental protection box 13 are connected by a second pipe 16. A water tank 18 is located on one side of the transparent detection box 2. The water tank 18 and the transparent detection box 2 are connected by a third pipe 19.

[0022] In this device, the transparent detection box 2 includes a box body 4 and a box cover 5. The box cover 5 is fastened to the box body 4. The top of the box cover 5 is connected to the moving plate 21 through a connecting rod. The top of the box cover 5 has a stepped positioning hole 6. The bottom of the inner cavity of the box cover 5 has six assembly holes 7. The rock cuttings tank 20 is installed inside the assembly holes 7. The six assembly holes 20 are connected to the stepped positioning hole 6 through the air guide channel 8. The air guide ring 9 is rotatably installed inside the stepped positioning hole 6. The top of the air guide ring 9 is connected to the bottom of the gas collection tank 3 through the first pipe 10.

[0023] In practical applications, the cover 5 includes a cover plate 33 and a housing 34. An assembly hole 6 is opened through the bottom of the housing 34. The cover plate 33 is glued and fixed to the housing 34. A rubber sealing ring 35 is connected to the outer periphery of the air guide ring 9. Air guide holes 36 are opened on the air guide ring 9 and the rubber sealing ring 35. An air guide channel 8 is opened on the opposite side of the cover plate 33 and the housing 34. The air guide hole 36 is adapted to the air guide channel 8. An embedded frame 37 is installed at the bottom of the housing 34. An embedded groove 38 is provided at the top of the box body 4. The embedded frame 37 is adapted to the embedded groove 38. A rubber pad 39 is installed at the bottom of the inner cavity of the embedded groove 38.

[0024] In this device, a horizontal scale line 30 is provided at the bottom of the outer surface of the front side of the box body 4, and vertical scale lines 31 are provided on both sides of the outer surface of the front side of the box body 4. A pad plate 40 is installed at the bottom of the inner cavity of the box body 4. A blind hole 41 adapted to the rock cutting container 20 is opened at the top of the pad plate 40. The top of the pad plate 40 is connected to the core frame 42. A blue background plate 11 is installed on the back of the inner cavity of the box body 4.

[0025] It should be noted that in practical applications, control valves 17 are installed on both the first pipe 10 and the second pipe 15, the outside of the gas collecting tank 3 is provided with a metering scale line 32, and the inner diameter of the assembly hole 7 is adapted to the outer diameter of the rock cuttings tank 20.

[0026] In this device, the height adjustment component 12 includes a fixed plate 22. The top of the fixed plate 22 is rotatably connected to a single-threaded rod 23 via a bearing. The single-threaded rod 23 has an external thread. The single-threaded rod 23 passes through and is threadedly connected to a movable plate 21. The top of the single-threaded rod 23 passes through a first-layer support plate. A rotating head 24 is installed at the top of the single-threaded rod 23. The top of the movable plate 21 is connected to two auxiliary rods 25. The two ends of the two auxiliary rods 25 are respectively connected to the first-layer support plate and the fixed plate 22.

[0027] In practical applications, the fixed plate 22 is fixedly installed on the inner side of the bracket body, and the movable plate 21 is installed above the fixed plate 22. One side of the movable plate 21 slides in contact with the outer surface of the inner side of the bracket body. The top of the movable plate 21 is provided with a through hole 26, and the bottom of the annular protective box 13 is provided with a positioning ring 27. The positioning ring 27 is adapted to the through hole 25. In addition, a lighting lamp 28 and an ultraviolet lamp 29 are installed at the lower end of the inner side of the bracket body. The ultraviolet lamp 29 is located on one side of the lighting lamp 28.

[0028] This invention provides a shale oil and gas quantitative gas extraction device during drilling. Through the arrangement of a vacuum pump 14, an annular protective box 13, a first pipeline 10, a gas collection tank 3, a transparent detection box 2, a second pipeline 16, a control valve 17, a third pipeline 19, and a water tank 18, after placing the core sample into the transparent detection box 2, the vacuum pump 14 creates a negative pressure state, forcing water into the gas collection tank 3. Then, the gas escaping from the core sample forces the water in the gas collection tank 3 into the water tank 18. The annular protective box 13 also provides water ingress protection for the vacuum pump 14, achieving effective gas collection. It can accurately determine the gas content and monitor the state of the bubbles escaping from the core sample through the transparent detection box 3, providing data support for judging the development and strength of shale fractures.

[0029] Furthermore, the present invention, through the arrangement of assembly hole 7, air guide channel 8, air guide ring 9, rubber sealing ring 35, air guide hole 36 and rock cutting tube 20, allows for the individual collection of gas from different rock cutting tanks 20 simply by rotating the air guide ring 9, which is convenient to use and improves the applicability of the device.

[0030] Meanwhile, the present invention provides support for high-definition acquisition of the bubble image in the transparent detection box 2 by setting up the lighting lamp 28, ultraviolet lamp 29, horizontal scale line 30, vertical scale line 31, measurement scale line 32 and blue background plate 11, and provides high-quality data for subsequent judgment of shale gas in core samples.

[0031] The working principle of this shale oil and gas drilling-while-drilling quantitative gas extraction device is described in detail below: In this embodiment, the system includes a support 1, a transparent detection box 2, and a gas collection tank 3 disposed above the transparent detection box 2. The transparent detection box 2 is placed on the second support plate of the support 1. Specifically, the transparent detection box 2 includes a box body 4 and a box cover 5. To ensure a tight seal between the box body 4 and the box cover 5, an embedded frame 37 is fixedly connected to the bottom of the box body 4, and an embedded groove 38 is provided on the top of the box body 4. The embedded frame 37 and the embedded groove 38 are used in conjunction, and a rubber pad 39 is provided at the bottom of the inner cavity of the embedded groove 38.

[0032] In practical applications, in order to achieve convenient and stable control of the box 4, the first layer of the support plate of the bracket 1 is connected to the height adjustment component 12 through the connecting hole. The height adjustment component 12 includes a movable plate 21 and a fixed plate 22. The top of the fixed plate 22 is rotatably connected to a single-threaded rod 23 through a bearing. The single-threaded rod 23 passes through and is threaded onto the movable plate 21, and the top end of the single-threaded rod 23 passes through the first layer of the support plate of the bracket 1. The single-threaded rod 23 is fixedly connected to a rotating head 24. The top of the movable plate 21 is provided with two auxiliary rods 25. The two ends of the two auxiliary rods 25 are respectively fixedly connected to the opposite side of the bracket 1 and the fixed plate 22. The fixed plate 22 is fixedly installed on the inner side of the support body of the bracket 1. The movable plate 21 is located above the fixed plate 22, and the left side of the movable plate 21 slides in contact with the outer surface of the inner side of the support body of the bracket 1.

[0033] In this embodiment, to facilitate the detection and judgment of core samples, a pad 40 is fixed to the bottom of the inner cavity of the box 4, and a core frame 42 is fixed to the top of the pad 40. A blue background plate 11 is fixed to the back of the inner cavity of the box 4. An illumination lamp 28 and an ultraviolet lamp 29 are fixed to the inner side of the support body of the support 1. A horizontal scale line 30 is provided at the bottom of the front of the box 4, and vertical scale lines 31 are provided on both the left and right sides of the front of the box 4. A metering scale line 32 is provided on the front of the gas collecting tank 3. The illumination lamp 28 and the ultraviolet lamp 29 can provide a stable and effective light source support when the front of the transparent detection box 2 is recorded by an external camera.

[0034] In practical applications, to ensure the accuracy of gas collection in the gas collecting tank 3, a stepped positioning hole 6 is provided on the top of the cover 5. The top of the cover 5 is fixedly connected to the bottom of the moving plate 21 via a connecting rod. A guide ring 9 is rotatably installed inside the stepped positioning hole 6. The top of the guide ring 9 is connected to the bottom of the gas collecting tank 3 via a first pipe 10. An annular protective box 13 is rotatably installed on the moving plate 21. The annular protective box 13 is equipped with a drain pipe with a valve. Specifically, a through hole 26 is provided on the top of the moving plate 21. A positioning ring 27 is fixedly connected to the bottom of the protective box 13, and the positioning ring 27 is compatible with the through hole 26. A vacuum pump 14 is fixedly connected to the first layer of the support plate of the bracket 1. The vacuum pump 14 is connected to the annular protective box 13 through a metal hose 15. The top of the gas collecting tank 3 is connected to the inside of the annular protective box 13 through a second pipe 16. Control valves 17 are provided on both the first pipe 10 and the second pipe 16. A water tank 18 is fixedly connected to one side of the second layer of the support plate of the bracket 1, and the water tank 18 and the box body 4 are connected through a third pipe 19.

[0035] In this embodiment, to detect the gas content of rock cuttings, six assembly holes 7 are provided at the bottom of the inner cavity of the cover 5. The six assembly holes 7 are connected to the stepped positioning holes 6 through the air guide channel 8. A matching rock cutting canister 20 is provided inside the assembly hole 7. The rock cutting canister 20 is a cylindrical structure with several grooves on the top. The top of the pad 40 is provided with a blind hole 41 that matches the rock cutting canister 20. Specifically, to facilitate the processing of the air guide channel 8 and the gas collection of the individual rock cutting canister 20, the cover 5 includes a cover plate 33 and a shell 34. The assembly holes 7 are provided through the bottom of the shell 34. The cover plate 33 is glued and fixed to the shell 34. A rubber sealing ring 35 is fixed to the outer periphery of the air guide ring 9. The air guide ring 9 and the rubber sealing ring 35 are provided with communicating air guide holes 36, as shown in the attached figure. Figure 2 As shown, the air guide channel 8 is opened on the opposite side of the cover plate 33 and the housing 34, and the air guide hole 36 is used in conjunction with the air guide channel 8.

[0036] It should be noted that the centerline of the air guide hole 36 is set parallel to the centerline of the control valve 17.

[0037] In practical applications, when testing core samples, the core sample is placed on the core holder 42, and the rotating head 24 is rotated. The rotating head 24 drives the single-threaded rod 23 to rotate, and the single-threaded rod 23 drives the moving plate 21 to move downward. The moving plate 21 drives the box cover 5 to move downward through the connecting rod, so that the embedded frame 37 is pressed into the embedded groove 38 and the rubber pad 39 is squeezed to complete the sealing of the box body 4. Then, the air guide ring 9 is rotated so that the air guide hole 36 is not connected to the air guide channel 8. Water is filled into the water tank 18 until the water overflows the box body 4 through the third pipe 19. Then, the negative pressure extraction is set. In this embodiment, the negative pressure extraction setting method includes the following two: A. Close the control valve 17 on the first pipeline 10, start the vacuum pump 14, and create a negative pressure environment in the annular protective box 13 through the metal hose 15. A valve needs to be installed on the metal hose 15. Opening the valve will create a negative pressure environment, and closing the valve will disconnect the metal hose 15. Then close the vacuum pump 14 and open the control valve 17 on the first pipeline 10 to perform negative pressure extraction. B. Directly start the vacuum pump 14 and open the control valve 17. The vacuum pump 14 will draw negative pressure through the metal hose 15. During the negative pressure extraction process described above, the water in the transparent detection box 2 flows into the gas collection tank 3 through the air guide ring 9 and the second pipe 16, and then flows into the annular protection box 13 through the first pipe 10. At this time, the control valve 17 on the first pipe 10 is closed. During the above-mentioned negative pressure extraction process, the water in the transparent detection box 2 flows into the gas collection tank 3 through the air guide ring 9 and the second pipe 16, and then flows into the annular protection box 13 through the first pipe 10. At this time, the vacuum pump 14 and the control valve 17 on the first pipe 10 are closed. A camera is set on the front of the transparent detection box 2 to capture the front view of the transparent detection box 2. At the same time, the lighting lamp 28 and the ultraviolet lamp are turned on. The gas in the core sample emerges in the form of bubbles. The gas flows into the gas collection tank 3 through the second pipe 16, pushing the water in the gas collection tank 3 downwards, so that the water flows into the water tank 18 through the third pipe 19. When the water in the gas collection tank 3 stops falling, the gas content of the core sample can be read according to the measuring scale 32. When testing the gas content of rock cuttings, core samples are no longer placed on the core holder 42. Rock cuttings are placed into the rock cutting container 20, and the rock cutting container 20 is placed into the blind hole 41. The above-mentioned core sample testing operation steps are repeated. The difference is that, as needed, the gas content in the rock cutting container 20 is collected. The air guide ring 9 is rotated to connect the air guide hole 36 with the air guide channel 8 on the corresponding assembly hole 7 of the rock cutting container 20. In this way, during the negative pressure extraction process, water will also flow through the air guide hole 36 on the air guide ring 9 into the corresponding air guide channel 8, and then into the rock cutting container 20.

[0038] The shale oil and gas quantitative gas extraction device provided by this invention, through the setup of a vacuum pump, an annular protective box, a gas collection tank, a transparent detection box, and a water tank, allows for effective gas collection after the core sample is placed in the transparent detection box. A negative pressure is created using the vacuum pump to force water into the gas collection tank. Then, the gas escaping from the core sample forces the water in the gas collection tank into the water tank. The annular protective box also protects the vacuum pump from water ingress, enabling effective gas collection. It allows for accurate determination of gas content and monitoring of the escaping gas bubbles from the core sample via the transparent detection box, providing data support for assessing the development and strength of shale fractures.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shale oil and gas drilling-while-drilling quantitative gas extraction device, characterized in that, include: The bracket (1) has two support plates and a bracket body. The bracket body and the two support plates are an integrated structure. The two support plates are a first support plate and a second support plate, respectively. The first support plate is installed at the top of the bracket body and the second support plate is installed at the bottom of the bracket body. The first support plate has a connecting hole. The first support plate is installed with a height adjustment component (12) through the connecting hole. The height adjustment component (12) includes a movable plate (21). The upper and lower ends of the movable plate (21) are the first support plate and the second support plate, respectively. The movable plate is movable. The first support plate is installed with a movable plate. A vacuum pump (14) is installed, and an annular environmental protection box (13) is installed on the movable plate (21). The vacuum pump (14) and the annular environmental protection box (13) are connected by a metal hose (15). A transparent detection box (2) is installed on the second layer support plate. A gas collection tank (3) is installed above the transparent detection box (2). The annular environmental protection box (13) is located above the gas collection tank (3). The interiors of the gas collection tank (3) and the annular environmental protection box (13) are connected by a second pipe (16). A water tank (18) is located on one side of the transparent detection box (2). The water tank (18) and the transparent detection box (2) are connected by a third pipe (19).

2. The shale oil and gas quantitative gas extraction device according to claim 1, characterized in that, The transparent detection box (2) includes a box body (4) and a box cover (5). The box cover (5) is fastened to the box body (4). The top of the box cover (5) is connected to the moving plate (21) through a connecting rod. The top of the box cover (5) is provided with a stepped positioning hole (6). The bottom of the inner cavity of the box cover (5) is provided with six assembly holes (7). The rock cuttings tank (20) is installed inside the assembly holes (7). The six assembly holes (7) are connected to the stepped positioning hole (6) through the air guide channel (8). The air guide ring (9) is rotatably installed inside the stepped positioning hole (6). The top of the air guide ring (9) is connected to the bottom of the gas collection tank (3) through the first pipe (10).

3. The shale oil and gas quantitative gas extraction device according to claim 2, characterized in that, Control valves (17) are installed on both the first pipe (10) and the second pipe (16). The outside of the gas collecting tank (3) is provided with a metering scale line (32). The inner diameter of the assembly hole (7) is adapted to the outer diameter of the rock cutting tank (20).

4. The shale oil and gas quantitative gas extraction device according to claim 1, characterized in that, The height adjustment assembly (12) includes a fixed plate (22), the top of which is rotatably connected to a single-threaded rod (23) via a bearing. The single-threaded rod (23) has an external thread. The single-threaded rod (23) passes through and is threadedly connected to a movable plate (21). The top end of the single-threaded rod (23) passes through a first-layer support plate. A rotating head (24) is installed at the top end of the single-threaded rod (23). The top of the movable plate (21) is connected to two auxiliary rods (25). The two ends of the two auxiliary rods (25) are respectively connected to the first-layer support plate and the fixed plate (22).

5. The shale oil and gas quantitative gas extraction device according to claim 4, characterized in that, The fixed plate (22) is fixedly installed on the inner side of the bracket body, and the movable plate (21) is installed above the fixed plate (22). One side of the movable plate (21) slides in contact with the outer surface of the inner side of the bracket body.

6. The shale oil and gas quantitative gas extraction device according to claim 1, characterized in that, The top of the movable plate (21) is provided with a through hole (26), and the bottom of the annular protective box (13) is provided with a positioning ring (27), which is adapted to the through hole (26).

7. The shale oil and gas quantitative gas extraction device according to claim 1, characterized in that, A lighting lamp (28) and an ultraviolet lamp (29) are installed on the lower end of the inner side of the main body of the bracket, and one side of the lighting lamp (28) is an ultraviolet lamp (29).

8. The shale oil and gas quantitative gas extraction device according to claim 2, characterized in that, The bottom of the outer surface of the front side of the box (4) is provided with a horizontal scale line (30), and both sides of the outer surface of the front side of the box (4) are provided with vertical scale lines (31).

9. The shale oil and gas quantitative gas extraction device according to claim 2, characterized in that, The cover (5) includes a cover plate (33) and a housing (34). The assembly hole (7) is opened through the bottom of the housing (34). The cover plate (33) is bonded and fixed to the housing (34). The outer periphery of the air guide ring (9) is connected to a rubber sealing ring (35). Air guide holes (36) are opened on the air guide ring (9) and the rubber sealing ring (35). The air guide channel (8) is opened on the opposite side of the cover plate (33) and the housing (34). The air guide hole (36) is adapted to the air guide channel (8).

10. The shale oil and gas quantitative gas extraction device according to claim 9, characterized in that, An embedding frame (37) is installed at the bottom of the housing (34), and an embedding groove (38) is provided at the top of the box (4). The embedding frame (37) is adapted to the embedding groove (38), and a rubber pad (39) is installed at the bottom of the inner cavity of the embedding groove (38).

11. The shale oil and gas quantitative gas extraction device according to claim 8, characterized in that, A pad (40) is installed at the bottom of the inner cavity of the box (4). The top of the pad (40) is provided with a blind hole (41) adapted to the cuttings container (20). The top of the pad (40) is connected to the core frame (42).

12. The shale oil and gas quantitative gas extraction device according to claim 8, characterized in that, A blue background plate (11) is installed on the back of the inner cavity of the box (4).

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