Tracer injection device

Abstract

The utility model relates to the technical field of tracer injection, in particular to a tracer injection device. The tracer agent injection device comprises two sets of injection cylinders arranged side by side, pistons in sliding connection are installed in the two sets of injection cylinders, and piston rods are fixedly installed on the pistons; and a middle connecting part is erected between the two groups of injection cylinders. According to the tracer agent injection device, when one piston slides upwards along the injection cylinder, negative pressure is formed in the injection cylinder so that tracer agents in the tracer agent storage tank can be sucked into the injection cylinder, and the other piston slides downwards along the injection cylinder and discharges the tracer agents in the injection cylinder into an oil well injection pipe. Due to the fact that the two injection barrels can continuously inject the tracer into the oil well injection pipe, meanwhile, the tracer can be autonomously sucked, manual adding is not needed, when one set of injection barrels are damaged or a pipeline is damaged, the other injection barrel can intermittently inject the tracer, and injection interruption of the tracer cannot be caused.

Description

Technical Field

[0001] This utility model relates to the field of tracer injection technology, and in particular to a tracer injection device. Background Technology

[0002] In fields such as oil extraction, groundwater monitoring, and chemical reaction process tracking, tracer injection technology is a key means of achieving process monitoring and data analysis. The tracer needs to be injected stably and continuously into the target system (such as oil wellbore, groundwater layer, or reaction pipeline) at a preset flow rate to ensure accurate flow parameters, sealing effects, or reaction progress information can be obtained by detecting the tracer concentration distribution. Currently, most mainstream tracer injection devices adopt a single injection cylinder structure, which relies on the reciprocating motion of a single piston to achieve a "liquid intake-discharge" cycle. However, the "liquid intake" and "discharge" processes of a single injection cylinder cannot be synchronized. When the piston moves upward to intake liquid, the discharge process is forced to stop, causing periodic fluctuations in the tracer injection flow rate. In scenarios such as oil extraction where continuous injection is crucial, such interruptions can lead to uneven distribution of tracers within the wellbore, directly affecting the accuracy of tracer concentration detection in subsequent produced fluids and interfering with the assessment of reservoir flow characteristics. In a single injection cylinder structure, if any component of the inlet or outlet valve malfunctions (such as leaking due to seal wear or valve blockage), the entire system will cease operation completely. This interruption in tracer injection can break the monitoring data chain. If maintenance is required, it will not only extend the monitoring cycle but may also cause data failure due to missing critical monitoring windows.

[0003] Therefore, it is necessary to provide a new tracer injection device to solve the above-mentioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a tracer injection device.

[0005] The tracer injection device provided by this utility model includes two sets of injection cylinders arranged side by side. Each set of injection cylinders is equipped with a piston that is slidably connected, and each piston is fixedly equipped with a piston rod.

[0006] A connecting component for driving two piston rods to drive alternately is provided between the two sets of injection cylinders, and the connecting component includes an active toothed plate and a driven toothed plate. The active toothed plate and the driven toothed plate are respectively fixedly installed on the two piston rods, and a meshing gear is installed between the active toothed plate and the driven toothed plate. A horizontally set drive plate is fixedly installed on the top of the active toothed plate.

[0007] The connecting component also includes a drive unit, which includes a frame on which a servo motor is fixedly mounted. A deflection plate is fixedly mounted on the output end of the servo motor, and a guide rod is fixedly mounted on the side of the deflection plate that is off from the rotation center. The guide rod passes through the waist-shaped cavity opened in the drive plate and is slidably connected to the waist-shaped cavity.

[0008] Preferably, each of the two injection cylinders is fixedly fitted with a sleeve ring, and a vertical plate is fixedly mounted between the two sleeve rings. The gear is rotatably mounted on the vertical plate via a rotating shaft, and the gear is respectively meshed with the driving gear plate and the driven gear plate on both sides.

[0009] Preferably, the front surfaces of both the active toothed plate and the driven toothed plate are provided with limiting grooves, and limiting slide plates are fixedly installed on both of the two sleeve rings. The two limiting slide plates are respectively inserted into the limiting grooves provided in the active toothed plate and the driven toothed plate and are slidably connected to the limiting grooves.

[0010] Preferably, a one-way inlet valve is fixedly installed on the side wall near the bottom of the injection cylinder, and an inlet pipe is fixedly installed on the one-way inlet valve.

[0011] Preferably, a one-way drain valve is fixedly installed at the bottom of the injection cylinder, and a drain pipe is fixedly installed on the one-way drain valve.

[0012] Preferably, the bottom of the injection cylinder has a contracting conical structure, and the bottom of the piston matches the conical structure.

[0013] Compared with related technologies, the tracer injection device provided by this utility model has the following beneficial effects:

[0014] When one piston slides upward along the injection cylinder, a negative pressure is created inside the injection cylinder, drawing the tracer from the tracer storage tank into the injection cylinder. Meanwhile, the other piston slides downward along the injection cylinder, discharging the tracer from the injection cylinder into the well filling pipe. Therefore, the two injection cylinders can continuously inject tracer into the well filling pipe. They can also autonomously draw in tracer without manual addition. Furthermore, if one set of injection cylinders is damaged or the pipeline is damaged, the other injection cylinder can still intermittently inject tracer without interrupting the injection, ensuring the integrity of the monitoring data chain and reducing the impact of equipment downtime for maintenance on the monitoring process. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the tracer injection device provided by this utility model;

[0016] Figure 2 for Figure 1 A cross-sectional view of the injection cylinder shown.

[0017] Figure 3 for Figure 2 One of the structural schematic diagrams of the connecting component shown;

[0018] Figure 4 for Figure 2 The second schematic diagram of the structure of the connecting component is shown.

[0019] The following are the labeling elements in the diagram: 1. Injection cylinder; 11. One-way inlet valve; 111. Inlet pipe; 12. One-way drain valve; 121. Drain pipe; 2. Piston; 3. Piston rod; 4. Connecting component; 41. Sleeve ring; 42. Vertical plate; 43. Gear; 44. Driving gear plate; 441. Drive plate; 45. Driven gear plate; 46. Drive component; 461. Frame; 462. Servo motor; 463. Deflection plate; 464. Guide rod; 47. Limiting slide groove; 48. Limiting slide plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0022] Please see Figures 1 to 4 The present invention provides a tracer injection device, which includes two sets of injection cylinders 1, pistons 2 and connecting components 4 arranged side by side.

[0023] In the embodiments of this utility model, please refer to Figures 1 to 4 Both sets of injection cylinders 1 are equipped with slidingly connected pistons 2, and each piston 2 is fixedly equipped with a piston rod 3. A one-way inlet valve 11 is fixedly installed on the side wall near the bottom of the injection cylinder 1, and an inlet pipe 111 is fixedly installed on the one-way inlet valve 11. A one-way drain valve 12 is fixedly installed at the bottom of the injection cylinder 1, and a drain pipe 121 is fixedly installed on the one-way drain valve 12.

[0024] It should be noted that: the two inlet pipes 111 are connected to the output end of the tracer storage tank respectively, and the two outlet pipes 121 are inserted into the inlet of the oil well injection pipe. Then, the central component 4 is used to drive the tracer to be continuously injected into the oil well injection pipe.

[0025] Furthermore, the bottom of the injection cylinder 1 has a concave conical structure, and the bottom of the piston 2 matches the conical structure, so that the piston 2 can drive the tracer in the injection cylinder 1 to be completely discharged from the injection cylinder 1.

[0026] In the embodiments of this utility model, please refer to Figures 1 to 4 A connecting component 4 is provided between the two sets of injection cylinders 1 to drive the two piston rods 3 alternately. The connecting component 4 includes an active toothed plate 44 and a driven toothed plate 45. The active toothed plate 44 and the driven toothed plate 45 are respectively fixedly installed on the two piston rods 3. A gear 43 is installed between the active toothed plate 44 and the driven toothed plate 45 for meshing connection. Specifically, a sleeve ring 41 is fixedly fitted on both injection cylinders 1, and a vertical plate 42 is fixedly mounted between the two sleeve rings 41. The gear 43 is rotatably mounted on the vertical plate 42 through a rotating shaft. The gear 43 is meshed with the active toothed plate 44 and the driven toothed plate 45 on both sides respectively. A horizontally set drive plate 441 is fixedly installed on the top of the active toothed plate 44.

[0027] The Zhonglian component 4 also includes a drive unit 46, which includes a frame 461. A servo motor 462 is fixedly mounted on the frame 461, and a deflection plate 463 is fixedly mounted on the output end of the servo motor 462. A guide rod 464 is fixedly mounted on the side of the deflection plate 463 that is off from the rotation center. The guide rod 464 passes through the waist-shaped cavity opened in the drive plate 441 and is slidably connected to the waist-shaped cavity.

[0028] It should be noted that: In the initial state, the piston 2 in one injection cylinder 1 is at the lowest position, and the piston 2 in the other injection cylinder 1 is at the highest position. Then, the servo motor 462 is started to drive the guide rod 464 to rotate. As the guide rod 464 rotates, it drives the active toothed plate 44 to slide up and down along the injection cylinder 1 through the drive plate 441. Since the active toothed plate 44 is meshed with the driven toothed plate 45 through the gear 43, the driven toothed plate 45 slides down when the active toothed plate 44 slides up, and the driven toothed plate 45 slides up when the active toothed plate 44 slides down, so that the pistons 2 in the two injection cylinders 1 can alternately move up and down.

[0029] Therefore, when one piston 2 slides up along the injection cylinder 1, a negative pressure is formed inside the injection cylinder 1, which draws the tracer in the tracer storage tank into the injection cylinder 1, while the other piston 2 slides down along the injection cylinder 1 and discharges the tracer in the injection cylinder 1 into the well injection pipe;

[0030] Therefore, the two injection cylinders 1 can continuously inject tracer into the well injection pipe, and can also autonomously draw in tracer without manual addition. Furthermore, when one set of injection cylinders 1 is damaged or the pipeline is damaged, the other injection cylinder 1 can still inject tracer intermittently without interrupting the tracer injection, ensuring the integrity of the monitoring data chain and reducing the impact of equipment downtime maintenance on the monitoring process.

[0031] Furthermore, both the active toothed plate 44 and the driven toothed plate 45 have limit grooves 47 on their front surfaces, and limit slide plates 48 are fixedly installed on both sleeve rings 41. The two limit slide plates 48 are respectively inserted into the limit grooves 47 of the active toothed plate 44 and the driven toothed plate 45 and are slidably connected to the limit grooves 47, which improves the stability when the active toothed plate 44 and the driven toothed plate 45 slide up and down alternately.

[0032] In addition, a dust cover (made of transparent plastic, which makes it easy to observe the internal transmission status) is installed on the outside of the vertical plate 42. The dust cover prevents external impurities from entering the meshing part and does not affect the up and down sliding of the gear plate. At the same time, an oil injection nozzle is added to the shaft end of the gear 43 to inject grease regularly, reduce tooth surface wear, and extend the service life of the transmission components.

[0033] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A tracer injection device, comprising two sets of injection cylinders (1) arranged side by side, wherein each set of injection cylinders (1) is equipped with a piston (2) that is slidably connected thereto, and each piston (2) is fixedly mounted with a piston rod (3), characterized in that: A connecting component (4) for driving two piston rods (3) to drive alternately is provided between the two sets of injection cylinders (1). The connecting component (4) includes an active toothed plate (44) and a driven toothed plate (45). The active toothed plate (44) and the driven toothed plate (45) are respectively fixedly installed on the two piston rods (3). A meshing gear (43) is installed between the active toothed plate (44) and the driven toothed plate (45). A horizontally arranged drive plate (441) is fixedly installed on the top of the active toothed plate (44). The connecting component (4) further includes a drive component (46), which includes a frame (461). A servo motor (462) is fixedly mounted on the frame (461), and a deflection plate (463) is fixedly mounted on the output end of the servo motor (462). A guide rod (464) is fixedly mounted on the side of the deflection plate (463) that is off from the rotation center. The guide rod (464) passes through the waist-shaped cavity opened in the drive plate (441) and is slidably connected to the waist-shaped cavity.

2. The tracer injection device according to claim 1, characterized in that, Both injection cylinders (1) are fixedly fitted with sleeve rings (41), and a vertical plate (42) is fixedly mounted between the two sleeve rings (41). The gear (43) is rotatably mounted on the vertical plate (42) via a rotating shaft, and the gear (43) is meshed with the active gear plate (44) and the driven gear plate (45) on both sides respectively.

3. The tracer injection device according to claim 2, characterized in that, The front surfaces of the active toothed plate (44) and the driven toothed plate (45) are provided with limiting grooves (47), and the two sleeve rings (41) are fixedly installed with limiting slide plates (48). The two limiting slide plates (48) are respectively inserted into the limiting grooves (47) provided in the active toothed plate (44) and the driven toothed plate (45) and are slidably connected to the limiting grooves (47).

4. The tracer injection device according to claim 1, characterized in that, A one-way inlet valve (11) is fixedly installed on the side wall near the bottom of the injection cylinder (1), and an inlet pipe (111) is fixedly installed on the one-way inlet valve (11).

5. The tracer injection device according to claim 4, characterized in that, A one-way drain valve (12) is fixedly installed at the bottom of the injection cylinder (1), and a drain pipe (121) is fixedly installed on the one-way drain valve (12).

6. The tracer injection device according to claim 1, characterized in that, The bottom of the injection cylinder (1) has a contracting conical structure, and the bottom of the piston (2) matches the conical structure.

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