Infrared gas light hydrocarbon analyzer for mud logging

Abstract

The present application relates to the technical field of gas analysis, and proposes an infrared gas light hydrocarbon analyzer for well logging, which comprises a docking hole, a gas cylinder, a flow guide pipe fitting and a temperature adjusting mechanism, the docking hole is detachably provided with a protective docking mechanism, the gas cylinder is detachably connected with a docking pipe, the protective docking mechanism is sleeved on the gas cylinder, the protective docking mechanism is used for protecting the gas cylinder and is detachably connected with the shell, the docking pipe penetrates through the center of the flow guide pipe fitting, the flow guide pipe fitting is detachably connected with the protective docking mechanism, openings communicating with the docking hole are formed on the two sides of the flow guide pipe fitting, the upper end of the temperature adjusting mechanism corresponds to the flow guide pipe fitting, and the temperature adjusting mechanism is used for adjusting the temperature inside the shell and the protective docking mechanism, so as to solve the problem that the composition in the gas may change due to the difference in the environment of the analyzer when analyzing the gas in the laboratory.

Description

Technical Field

[0001] This invention relates to the field of gas analysis technology, specifically to an infrared gas light hydrocarbon analyzer for logging. Background Technology

[0002] During oil drilling, timely observation of underground formations is crucial. Downhole gas detection helps identify oil and gas layers, assess oil and gas content, and prevent blowouts and other accidents. This process is called well logging. During measurement, drilling fluid is quantitatively extracted at the well outlet. The drilling fluid is then heated, stirred, and degassed to obtain sample gas. The sample gas contains various light hydrocarbon components. After filtration and purification, the gas composition is analyzed. Traditional gas detection methods include catalytic combustion and thermal conductivity detection. These methods have risks such as low sensitivity, incomplete component measurement, and potential poisoning. Now, infrared analyzers can be used for gas analysis via infrared absorption. Infrared analyzers offer advantages such as high sensitivity, fast analysis speed, and high safety, making them a superior detection instrument.

[0003] During well logging, in most cases, the treated gas is directly analyzed by passing it into an infrared analyzer on-site, allowing for real-time adjustments to the mining plan. However, when analyzing complex components in the gas and calibrating and archiving the data, the gas sample needs to be transported to the laboratory via gas cylinders for further analysis. Since the sample gas contains multiple components, various light hydrocarbon components can react under conditions of shaking, pressure, and temperature, causing changes in component content. This necessitates the use of specially designed gas cylinders for transportation, while maintaining temperature and stability during transport. Even after connecting the gas cylinder to the infrared analyzer at the laboratory, temperature differences between the analyzer and the gas cylinder can still cause partial changes in component composition. Summary of the Invention

[0004] This invention proposes an infrared gas light hydrocarbon analyzer for logging, which solves the problem in the prior art where gas analysis in the laboratory sometimes results in changes in the reaction of gas components due to environmental differences in the analyzer.

[0005] The technical solution of the present invention is as follows: An infrared gas light hydrocarbon analyzer for logging includes a housing with a gas chamber inside. It also includes a docking hole, a gas cylinder, a flow guide pipe, and a temperature regulating mechanism. The docking hole is located on the upper part of the housing. A connecting pipe is fixedly connected to the gas chamber and positioned at the center of the docking hole. The gas cylinder is detachably equipped with a protective docking mechanism, which is detachably connected to the connecting pipe. The protective docking mechanism is sleeved on the gas cylinder and serves to protect it. It is also detachably connected to the housing. The flow guide pipe is rotatably connected inside the housing. The connecting pipe extends through the center of the guide pipe, and the guide pipe is detachably connected to the protective docking mechanism. Openings communicating with the docking holes are provided on both sides of the guide pipe. A temperature regulating mechanism is fixedly connected inside the housing, and an air conditioner is fixedly installed on the housing. The upper end of the temperature regulating mechanism corresponds to the guide pipe. The temperature regulating mechanism is used to regulate the temperature inside the housing and inside the protective docking mechanism. Covers are detachably installed on both the vent and the vent cover. When not connected, the cover is used to seal and reduce gas flow.

[0006] The protective docking mechanism includes a rectangular shell, a partition fixing strip, a second docking pipe, and a vent cover. The rectangular shell is a cuboid, and the gas cylinder is detachably installed in the rectangular shell. An insulation cavity is left between the rectangular shell and the gas cylinder. The partition fixing strip is fixedly connected to the rectangular shell, and a rubber strip is fixedly connected to the partition fixing strip at the contact position with the gas cylinder. The partition fixing strip divides the insulation cavity into two interconnected parts. The second docking pipe is fixedly connected to the gas cylinder, and the second docking pipe is detachably connected to the first docking pipe. The vent cover is fixedly connected to the rectangular shell, and the second docking pipe passes through the center of the vent cover. The vent cover is threadedly connected to the docking hole. Vent holes are opened on both sides of the partition fixing strip on the vent cover, and the two vent holes are respectively connected to the two parts of the insulation cavity. A rotating plate is fixedly installed on the side of the vent cover away from the gas cylinder.

[0007] The housing has two arc-shaped grooves, which surround the docking hole. A limiting hole is formed inside one end of each arc-shaped groove. Two limiting rods are provided on the rectangular outer shell, and a spring is provided between the limiting rods and the rectangular outer shell. The limiting rods can slide into the arc-shaped grooves and the limiting holes.

[0008] An L-shaped groove is provided on the end of the connecting pipe one that is away from the gas chamber. A magnetic sleeve is slidably connected to the end of the connecting pipe two that is away from the gas cylinder. The magnetic sleeve is slidably fitted on the connecting pipe one. The magnetic sleeve is provided with protruding teeth corresponding to the L-shaped groove. When the magnetic sleeve is slidably fitted on the connecting pipe one, it is located between the guide pipe and the vent cover.

[0009] The flow guide pipe is provided with a second rotating plate, an air collecting port, and a flow divider. The second rotating plate is fixedly connected to the center of the flow guide pipe and divides the internal cavity of the flow guide pipe into two parts. The second rotating plate can contact the first rotating plate. Air collecting ports are opened on both sides of the flow guide pipe. The two air collecting ports are respectively connected to the two cavities inside the flow guide pipe. The two ends of the flow divider are fixedly connected to the two air collecting ports respectively.

[0010] The temperature regulating mechanism includes an exhaust pipe and an intake pipe, which are disposed on the upper side of the housing. The exhaust pipe is connected to the air outlet of the air conditioner, and the upper end of the exhaust pipe is aligned with the guide pipe and disposed on the lower side of the housing. The intake pipe is connected to the air inlet of the air conditioner, and the lower end of the intake pipe is disposed on both sides of the air chamber. When the vent cover is not aligned with the docking hole, the diverter plate is aligned with the upper end of the exhaust pipe. When the first rotating plate drives the second rotating plate to rotate, the air collection port is aligned with the upper end of the exhaust pipe.

[0011] The working principle and beneficial effects of this invention are as follows: 1. In this invention, a rectangular outer shell and partition fixing strips are set to fix the gas cylinder and divide the insulation chamber into two zones. This allows the airflow to flow through the insulation chamber and regulate the temperature around the gas cylinder. At the same time, it avoids dead zones in the insulation chamber where gas cannot flow, and can ensure that the temperature of the gas chamber and the gas cylinder are the same. 2. In this invention, by setting a rectangular outer shell and a temperature regulating mechanism, the airflow driven by the air conditioner circulates in the shell, which fully regulates the temperature in the shell. At the same time, the airflow can enter the guide pipe, which allows the airflow to circulate in the insulation cavity. 3. In this invention, the gas cylinder can be protected by a protective docking mechanism, while allowing gas circulation within the cylinder. The temperature regulation mechanism allows the airflow to circulate within the casing to maintain a uniform temperature. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the shell in this invention; Figure 3 This is a schematic diagram of the protective docking mechanism in this invention; Figure 4 This is a schematic diagram of the internal cross-sectional structure of the rectangular outer shell in this invention; Figure 5 This is a partial structural diagram of the vent cover and the limiting rod in this invention; Figure 6 This is a partial structural diagram of the mating hole and the connecting pipe in this invention; Figure 7 This is a partial internal cross-sectional view of the flow guide pipe and the docking hole in this invention. Figure 8 This is a partial internal cross-sectional view of the exhaust pipe and intake pipe in this invention.

[0014] In the diagram: 1. Shell; 2. Air chamber; 3. Docking hole; 4. Connecting pipe one; 5. Gas cylinder; 6. Guide pipe fitting; 7. Rectangular shell; 8. Insulation cavity; 9. Partition fixing strip; 10. Connecting pipe two; 11. Vent cover; 12. Vent hole; 13. Rotating plate one; 14. Arc groove; 15. Limiting hole; 16. Limiting rod; 17. L-shaped slide groove; 18. Magnetic sleeve; 19. Rotating plate two; 20. Air collection port; 21. Diverter plate; 22. Exhaust pipe; 23. Intake pipe; 24. Air conditioner. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figures 1-8As shown in the figure, this embodiment proposes an infrared gas light hydrocarbon analyzer for logging, including a housing 1, a gas chamber 2 disposed in the housing 1, a docking hole 3, a gas cylinder 5, a flow guide pipe 6, and a temperature regulating mechanism. The docking hole 3 is located on the top of the housing 1. A connecting pipe 4 is fixedly connected to the gas chamber 2 and is located in the center of the docking hole 3. The gas cylinder 5 is detachably equipped with a protective docking mechanism, and the gas cylinder 5 is detachably connected to the connecting pipe 4. The protective docking mechanism is sleeved on the gas cylinder 5 to protect the gas cylinder 5 and is detachably connected to the housing 1. The flow guide pipe 6 is rotatably connected inside the housing 1. The connecting pipe 4 passes through the center of the flow guide pipe 6 and is detachably connected to the protective docking mechanism. The flow guide pipe 6 has docking points on both sides. The opening of hole 3 connects to the temperature regulation mechanism, which is fixedly connected inside the housing 1. An air conditioner 24 is fixedly installed on the housing 1. The upper end of the temperature regulation mechanism corresponds to the guide pipe 6. The temperature regulation mechanism is used to regulate the temperature inside the housing 1 and inside the protective docking mechanism. The protective docking mechanism protects the gas cylinder 5 and also serves to isolate and insulate the temperature. The connection between the protective docking mechanism and the docking hole 3 enables the connection between the inside of the housing 1 and the heat preservation cavity 8. Before the connection, the inside of the housing 1 is preheated and adjusted to the required temperature before docking. By circulating the gas in the heat preservation cavity 8, the temperature of the gas cylinder 5 and the gas chamber 2 are made the same, so that there will be no temperature difference during gas transition and the reaction changes of light hydrocarbon components inside the gas are minimized.

[0017] like Figures 1-5As shown, the protective docking mechanism includes a rectangular outer shell 7, a partition fixing strip 9, a second docking pipe 10, and a vent cover 11. The rectangular outer shell 7 is a cuboid, and the gas cylinder 5 is detachably installed in the rectangular outer shell 7. An insulation cavity 8 is left between the rectangular outer shell 7 and the gas cylinder 5. The partition fixing strip 9 is fixedly connected to the rectangular outer shell 7, and a rubber strip is fixedly connected to the partition fixing strip 9 at the contact position with the gas cylinder 5. The partition fixing strip 9 divides the insulation cavity 8 into two interconnected parts. The second docking pipe 10 is fixedly connected to the gas cylinder 5, and the second docking pipe 10 is detachably connected to the first docking pipe 4. A vent cover 11 is fixedly connected to the rectangular outer shell 7. A connecting pipe 2 10 passes through the center of the vent cover 11. The vent cover 11 is threadedly connected to the mating hole 3. Vent holes 12 are provided on both sides of the partition fixing strip 9 on the vent cover 11. The two vent holes 12 are respectively connected to two parts of the insulation cavity 8. A rotating plate 13 is fixedly installed on the side of the vent cover 11 away from the gas cylinder 5. By setting up the rectangular outer shell 7, it is convenient to transport multiple gas cylinders 5, avoid the gas cylinders 5 from rolling, and reduce shaking. The rectangular outer shell 7 is located away from the vent cover 11. A bracket perpendicular to the partition fixing strip 9 is provided on one side of the cylinder 5. Rubber strips are also provided on the bracket to support the gas cylinder 5. The two sides of the partition fixing strip 9 are connected through the bracket. The rubber strips support the gas cylinder 5 and reduce shock. During transportation, the gas cylinder 5 is placed in a transport device with a suitable temperature. When transporting the gas cylinder 5 to the laboratory, the insulation chamber 8 can extend the insulation effect on the gas cylinder 5. Simultaneously, through the connected two halves of the chamber, airflow can circulate within the insulation chamber 8, adjusting the temperature of the gas cylinder 5 and preventing overheating. There is a temperature difference between the air chamber 2 and the temperature difference during transportation. The temperature can also be corrected. Two vent holes 12 on the vent cover 11 are set on both sides of the rotating plate 13. The rotating plate 13 and the rotating plate 2 19 divide the area between the vent cover 11 and the guide pipe 6 into two parts, so that the airflow can enter one side of the heat preservation cavity 8 through the guide pipe 6 and one vent hole 12. After the airflow surrounds the gas cylinder 5, it enters the other side of the guide pipe 6 through the other vent hole 12 and leaves the guide pipe 6, realizing the airflow circulation in the heat preservation cavity 8.

[0018] like Figures 6-7As shown, the housing 1 has two arc-shaped grooves 14, which surround the docking hole 3. A limiting hole 15 is formed inside one end of each arc-shaped groove 14. The rectangular outer shell 7 has two limiting rods 16, with a spring between each limiting rod 16 and the rectangular outer shell 7. The limiting rods 16 can slide into the arc-shaped grooves 14 and the limiting holes 15. The two arc-shaped grooves 14 are 90-degree arcs, formed by rotating 180 degrees around the limiting holes 15. The rectangular outer shell is then... When 7 is connected, the threaded section on the vent cover 11 is aligned with the vent hole 12. At this time, the limiting rod 16 extends into the arc groove 14. The spring is compressed and shortened. Rotating the rectangular outer shell 7 causes the limiting rod 16 to slide in the arc groove 14 to the limiting hole 15. The spring pushes the limiting rod 16 into the limiting hole 15. At this time, the connecting pipe 1 4 and the connecting pipe 2 10 are connected, the vent cover 11 is connected with the limiting hole 15, and the limiting rod 16 prevents the rectangular outer shell 7 from reversing, thus limiting and fixing it.

[0019] like Figures 6-7 As shown, an L-shaped groove 17 is provided on the end of the connecting pipe 10 away from the gas chamber 2. A magnetic sleeve 18 is slidably connected to the end of the connecting pipe 10 away from the gas cylinder 5. The magnetic sleeve 18 is slidably fitted onto the connecting pipe 10. The magnetic sleeve 18 is provided with protruding teeth corresponding to the L-shaped groove 17. When the magnetic sleeve 18 is slidably fitted onto the connecting pipe 10, it is located between the guide pipe 6 and the vent cover 11. A magnetic element corresponding to the magnetic sleeve 18 is provided on the connecting pipe 10. When the vent cover 11 aligns with the limiting hole 15, the magnetic sleeve 18 slides onto the connecting pipe 4 under the action of magnetic force. At this time, the protruding teeth on the magnetic sleeve 18 slide into the L-shaped groove 17. Through the sliding of the magnetic force, the gas cylinder 5 can be connected relatively tightly without moving a long distance to the connecting pipe 4, simplifying the docking process. At this time, rotating the rectangular outer shell 7 allows the protruding teeth to slide in the L-shaped groove 17 to complete the docking of the connecting pipe 4 and the connecting pipe 2 10.

[0020] like Figure 7As shown, the guide tube 6 is equipped with a second rotating plate 19, an air collecting port 20, and a flow divider 21. The second rotating plate 19 is fixedly connected to the center of the guide tube 6, dividing the internal cavity of the guide tube 6 into two parts. The second rotating plate 19 can contact the first rotating plate 13. Air collecting ports 20 are provided on both sides of the guide tube 6. The air collecting ports 20 are funnel-shaped to facilitate gas entry and exit. The two air collecting ports 20 are respectively connected to the two internal cavities of the guide tube 6. The two ends of the flow divider 21 are fixedly connected to the two air collecting ports 20 respectively. When the vent cover 11 aligns with the limiting hole 15, the first rotating plate 13 contacts the second rotating plate 19. At this time, rotating the rectangular outer shell 7 causes the first rotating plate 13 to contact the second rotating plate 19. 13 drives the rotating plate 19 to rotate, aligning the air collection port 20 with the exhaust pipe 22. The airflow discharged from the exhaust pipe 22 can enter the air collection port 20 to push the gas flow in the insulation cavity 8, and then be discharged through another air collection port 20. Before the guide pipe 6 rotates, the diverter plate 21 is aligned with the exhaust pipe 22. The airflow impacts the diverter plate 21 and then splits to both sides to avoid the turbulence formed during the gas flow affecting the gas circulation. When the rectangular outer shell 7 is not connected to the shell 1, the air conditioner 24 adjusts the temperature inside the shell 1. The airflow in the exhaust pipe 22 is blown to the diverter plate 21 for diversion to avoid the airflow from turbulence at the guide pipe 6 affecting the gas circulation efficiency and function.

[0021] like Figure 2 and Figure 8 As shown, the temperature regulating mechanism includes an exhaust pipe 22 and an intake pipe 23. The exhaust pipe 22 is located on the upper side of the housing 1 and is connected to the air outlet of the air conditioner 24. The upper end of the exhaust pipe 22 is aligned with the guide pipe 6. The intake pipe 23 is located on the lower side of the housing 1 and is connected to the air inlet of the air conditioner 24. In this embodiment, the air conditioner 24 is an electrical cabinet air conditioner. A heat exchange port for exchanging heat with the outside is provided on the side of the air conditioner away from the housing 1. By connecting the air inlet and outlet of the air conditioner 24 with the temperature regulating mechanism, the gas in the housing will not be exchanged with the outside air through the air conditioner 24. The lower end of the intake pipe 23 is located on both sides of the air chamber 2. When the vent cover 11 is not aligned with the docking hole 3, the diverter plate 21 and The upper ends of the exhaust pipes 22 are aligned. When the first deflector plate 13 drives the second deflector plate 19 to rotate, the air intake port 20 is aligned with the upper end of the exhaust pipe 22. The airflow from the air outlet of the air conditioner 24 is blown out above the housing 1 and, after circulation, flows into the air conditioner 24 through the intake pipe 23 at the bottom of the housing 1. After passing through the air chamber 2, the gas circulates around the gas cylinder 5 in the rectangular housing 7. Then, the gas moves around the air chamber 2 to the bottom of the housing and enters the intake pipe 23, realizing internal gas circulation and reducing the influence of external temperature. Temperature sensors can be installed inside the housing and the air chamber for temperature detection. When a temperature change is detected, the air conditioner 24 can adjust the temperature of the gas circulating in the intake pipe 23 and the exhaust pipe 22.

[0022] In this embodiment, the light hydrocarbon gas is separated at the oil well and stored in gas cylinder 5. During transportation, gas cylinder 5 and rectangular outer shell 7 are insulated. After gas cylinder 5 is transported to the laboratory, air conditioner 24 is activated to regulate the temperature of shell 1. Gas circulates in shell 1 through exhaust pipe 22 and intake pipe 23. Gas from the exhaust port is blown to the diverter plate 21. The cover on the docking hole 3 and the guide pipe 6 is removed, and docking hole 3 is connected to guide pipe 6. At this time, the limiting rod 16 extends into the arc groove 14. The rectangular outer shell 7 is rotated, and the limiting rod 16 slides in the arc groove 14. When the limiting rod 16 slides to the limiting hole 15, the spring pushes... The moving limit rod 16 extends into the limit hole 15. At this time, the rectangular outer shell 7 cannot rotate. At the same time, the magnetic sleeve 18 slides on the connecting pipe 4 under the action of magnetic force. As the rectangular outer shell 7 rotates, the protruding teeth on the magnetic sleeve 18 rotate and connect in the L-shaped sliding groove. When the connecting hole 3 and the guide pipe 6 are connected, the first rotating plate 13 contacts the second rotating plate 19 and drives the guide pipe 6 to rotate, so that the gas collecting port 20 is aligned with the upper end of the exhaust pipe 22, so that the airflow can enter the heat preservation chamber 8 for circulation, so that the temperature of the gas cylinder 5 and the gas chamber 2 gradually become the same. Then, the light hydrocarbon gas in the gas cylinder 5 is introduced into the gas chamber 2 for testing.

[0023] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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. An infrared gas light hydrocarbon analyzer for logging, comprising a housing (1), wherein a gas chamber (2) is disposed within the housing (1), characterized in that, Also includes: A docking hole (3) is provided above the housing (1), and a connecting pipe (4) is fixedly connected to the air chamber (2). The connecting pipe (4) is located in the center of the docking hole (3). The gas cylinder (5) is detachably equipped with a protective docking mechanism. The gas cylinder (5) is detachably connected to the docking pipe (4). The protective docking mechanism is sleeved on the gas cylinder (5). The protective docking mechanism is used to protect the gas cylinder (5) and is detachably connected to the shell (1). The flow guide pipe (6) is rotatably connected inside the housing (1). The connecting pipe (4) passes through the center of the flow guide pipe (6). The flow guide pipe (6) is detachably connected to the protective docking mechanism. Openings communicating with the docking hole (3) are provided on both sides of the flow guide pipe (6). A temperature regulating mechanism is fixedly connected inside the housing (1). An air conditioner (24) is fixedly installed on the housing (1). The upper end of the temperature regulating mechanism corresponds to the flow guide pipe (6). The temperature regulating mechanism is used to regulate the temperature inside the housing (1) and inside the protective docking mechanism. The protective docking mechanism includes: The rectangular outer shell (7) is configured as a cuboid, and the gas cylinder (5) is detachably installed in the rectangular outer shell (7). An insulation cavity (8) is left between the rectangular outer shell (7) and the gas cylinder (5). A partition fixing strip (9) is fixedly connected in the rectangular outer shell (7). A rubber strip is fixedly connected to the partition fixing strip (9) at the contact position with the gas cylinder (5). The partition fixing strip (9) divides the heat preservation cavity (8) into two interconnected parts. Connecting pipe two (10) is fixedly connected to the gas cylinder (5), and the connecting pipe two (10) and the connecting pipe one (4) can be detached; Ventilation cover (11) is fixedly connected to the rectangular outer shell (7), the connecting pipe 2 (10) passes through the center of the ventilation cover (11), and the ventilation cover (11) is threadedly connected to the docking hole (3); Ventilation holes (12) are respectively provided on the ventilation cover (11) at the positions on both sides of the partition fixing strip (9). The two ventilation holes (12) are respectively connected to the two parts of the heat preservation cavity (8). A rotating plate (13) is fixedly provided on the side of the ventilation cover (11) away from the gas cylinder (5). The flow guide pipe (6) is provided with: Rotating plate two (19) is fixedly connected to the center of the flow guide pipe (6). The rotating plate two (19) divides the internal cavity of the flow guide pipe (6) into two parts. The rotating plate two (19) can contact the rotating plate one (13). The air collection port (20) is provided on both sides of the flow guide pipe (6), and the two air collection ports (20) are respectively connected to the two cavities inside the flow guide pipe (6); The flow divider (21) is fixedly connected to the two air collection ports (20) at both ends; The temperature regulating mechanism includes: An exhaust pipe (22) is provided on the upper side of the housing (1). The exhaust pipe (22) is connected to the air outlet of the air conditioner (24). The upper end of the exhaust pipe (22) is aligned with the guide pipe (6). An air intake pipe (23) is provided on the lower side of the housing (1). The air intake pipe (23) is connected to the air inlet of the air conditioner (24). The lower end of the air intake pipe (23) is provided on both sides of the air chamber (2). When the vent cover (11) is not connected to the docking hole (3), the diverter plate (21) is aligned with the upper end of the exhaust pipe (22). When the first rotating plate (13) drives the second rotating plate (19) to rotate, the air collection port (20) is aligned with the upper end of the exhaust pipe (22).

2. The infrared gas light hydrocarbon analyzer for logging according to claim 1, characterized in that, Two arc-shaped grooves (14) are provided on the housing (1), and the two arc-shaped grooves (14) are arranged around the docking hole (3). A limit hole (15) is provided inside one end of the arc-shaped groove (14).

3. The infrared gas light hydrocarbon analyzer for logging according to claim 2, characterized in that, Two limiting rods (16) are provided on the rectangular shell (7). A spring is provided between the limiting rod (16) and the rectangular shell (7). The limiting rod (16) can slide into the arc groove (14) and the limiting hole (15).

4. The infrared gas light hydrocarbon analyzer for logging according to claim 3, characterized in that, An L-shaped groove (17) is provided on the end of the connecting pipe one (4) away from the gas chamber (2), and a magnetic sleeve (18) is slidably connected on the end of the connecting pipe two (10) away from the gas cylinder (5). The magnetic sleeve (18) is slidably sleeved on the connecting pipe one (4), and the magnetic sleeve (18) is provided with protruding teeth corresponding to the L-shaped groove (17).

5. The infrared gas light hydrocarbon analyzer for logging according to claim 4, characterized in that, When the magnetic sleeve (18) is slidably sleeved on the connecting pipe (4), it is located between the guide pipe (6) and the vent cover (11).

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