Petroleum drilling coring cylinder coring device

Abstract

The utility model discloses a petroleum drilling coring cylinder coring device which comprises a bottom plate, the upper end of the bottom plate is fixedly connected with two sliding rails, the two sliding rails are both connected with sliding blocks in a sliding mode, the upper ends of the two sliding blocks are jointly and fixedly connected with a placing table, the upper end of the placing table is provided with a placing groove, and the upper end of the placing table is provided with a positioning groove. An L-shaped block is fixedly connected to the left side of the containing table, a hydraulic rod is fixedly connected to the right side of the L-shaped block, a push plate is fixedly connected to the telescopic end of the hydraulic rod, a mounting block is fixedly connected to the rear side of the containing table, and a driving motor is mounted at the upper end of the mounting block. According to the device, in the coring process of the coring cylinder, the placing table can transversely move through operation of the driving motor, then rock cores can be orderly arranged on the ground, and when the push plate moves back, water flow can be used for flushing the inner wall of the coring cylinder.

Description

A core extraction device for oil drilling core tubes Technical Field

[0001] This utility model relates to the field of oil drilling equipment technology, and in particular to an oil drilling core extraction device. Background Technology

[0002] Core sampling in oil drilling is a crucial technique for obtaining underground core samples, which is of great significance for analyzing formation structure and assessing oil and gas reserves. During oil drilling, the core sampler is the core tool for obtaining core samples; the collected core material needs to be extracted efficiently and completely for subsequent analysis. However, existing core sampler extraction devices still have some shortcomings in practical applications.

[0003] Traditional core extraction methods rely primarily on manual operation or simple mechanical assistance, resulting in high labor intensity and low efficiency. Manual operation not only easily damages the core, affecting the accuracy of subsequent analysis results, but also significantly increases the difficulty when dealing with large-diameter or deep core tubes. While some mechanical assistance devices can improve core extraction efficiency, they still have shortcomings in core arrangement and core tube cleaning. For example, the extracted cores are often piled up haphazardly, hindering subsequent processing and analysis; residual rock debris and mud on the inner wall of the core tube are difficult to remove effectively, affecting the reusability of the core tube.

[0004] Furthermore, existing core extraction devices are typically ground-mounted structures, with a certain height difference between the core tube and the ground. During the extraction process, the core is easily damaged by falling. Moreover, the device is susceptible to uneven ground during operation, resulting in poor stability and further affecting the core extraction efficiency.

[0005] Therefore, it is necessary to design a core extraction device for oil drilling cores to solve the above problems. Summary of the Invention

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a core extraction device for oil drilling cores. During the core extraction process, the device uses a drive motor to allow the placement platform to move laterally, thereby enabling the cores to be neatly arranged on the ground. Furthermore, when the push plate moves back, water can be used to rinse the inner wall of the core tube.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A core extraction device for oil drilling includes a base plate. Two slide rails are fixedly connected to the upper end of the base plate. A slider is slidably connected to each of the two slide rails. A placement platform is fixedly connected to the upper end of the two sliders. A placement groove is provided at the upper end of the placement platform. An L-shaped block is fixedly connected to the left side of the placement platform. A hydraulic rod is fixedly connected to the right side of the L-shaped block. A push plate is fixedly connected to the telescopic end of the hydraulic rod. An mounting block is fixedly connected to the rear side of the placement platform. A drive motor is mounted on the upper end of the mounting block. The output shaft of the drive motor passes through the mounting block and is fixedly connected to a gear. A rack plate that meshes with the gear is fixedly connected to the upper end of the base plate.

[0009] Preferably, two limiting blocks are fixedly connected to the inner bottom of the placement groove.

[0010] Preferably, the push plate is hollow inside, and an annular groove is provided on the outer side of the push plate, with multiple water outlets on the inner wall of the annular groove.

[0011] Preferably, a water tank and a water pump are installed on the upper end of the placement platform. The inlet of the water pump is connected to the bottom space of the water tank, and the outlet of the water pump is connected to the internal space of the push plate through a flexible hose.

[0012] Preferably, the base plate is embedded in the soil, and the inner bottom of the placement groove is flush with the ground.

[0013] Preferably, the thickness of the limiting block is the difference between the outer diameter and the inner diameter of the core tube.

[0014] Compared with existing technologies, the advantages of this device are:

[0015] 1. Compared with existing technologies, this device uses a drive motor to drive gears and racks, enabling the placement platform to move laterally. Combined with a hydraulic rod to push the push plate, it can neatly arrange the cores on the ground, avoiding the problem of messy core stacking and greatly improving the efficiency of core sorting and analysis. At the same time, the setting of the limiting block can accurately limit the position of the core tube, ensuring the stability of the core ejection process, effectively reducing core damage and improving core quality.

[0016] 2. Compared with existing technologies, this device innovatively incorporates a hollow structure and an annular groove within the pusher plate. A fluid system consisting of a water tank, pump, and hoses is used to flush the inner wall of the core sampler tube as the pusher plate retracts, eliminating the need for manual cleaning. This improves the cleaning efficiency of the core sampler tube, ensures effective cleaning, reduces residual rock debris and mud on the inner wall, extends the tube's lifespan, and lowers maintenance costs. Furthermore, the design of embedding the base plate in the ground and placing it flush with the ground eliminates the height difference during core extraction, preventing core damage from falling and enhancing the overall stability of the device. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the structure of a core extraction device for an oil drilling core tube proposed in this utility model;

[0018] Figure 2 is a structural schematic diagram of Figure 1 from another perspective;

[0019] Figure 3 is a schematic diagram of the structure of an oil drilling core extraction device proposed in this utility model, which is embedded in the soil.

[0020] In the diagram: 1. Base plate, 2. Slide rail, 3. Rack plate, 4. Slider, 5. Placement platform, 6. Placement slot, 7. Limiting block, 8. Water tank, 9. Water pump, 10. L-shaped block, 11. Hydraulic rod, 12. Push plate, 13. Hose, 14. Drive motor, 15. Gear. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Referring to Figures 1-3, a core extraction device for an oil drilling core sampler includes a base plate 1. Mounting holes are provided at each of the four corners of the base plate 1 for securely embedding it in the soil using ground anchors. Two slide rails 2 are fixedly connected to the upper end of the base plate 1, and sliders 4 are slidably connected to each slide rail 2. A placement platform 5 is fixedly connected to the upper end of the two sliders 4. A placement groove 6 is provided at the upper end of the placement platform 5. The placement groove 6 is a circular groove with a diameter 30mm larger than the outer diameter of the core sampler and a depth of 200mm, capable of accommodating the bottom of the core sampler. The inner wall of the placement groove 6 is polished to reduce surface roughness and prevent scratching the core sampler. An L-shaped block 10 is fixedly connected to the left side of the placement platform 5, and a hydraulic rod 11 is fixedly connected to the right side of the L-shaped block 10. The hydraulic rod 11 is an HSG series hydraulic cylinder with a rated pressure of 1... With a pressure of 6MPa and a stroke of 600mm, the hydraulic rod 11 is able to meet the requirements for core ejection. The hydraulic rod 11 is fixedly connected to the L-shaped block 10 and the push plate 12 through flanges and bolts. The connection is well sealed to prevent hydraulic oil leakage. The extension end of the hydraulic rod 11 is fixedly connected to the push plate 12. The rear side of the placement platform 5 is fixedly connected to the mounting block. The upper end of the mounting block is equipped with a drive motor 14. The drive motor 14 is a three-phase asynchronous motor, model Y132M-4, with a power of 7.5kW and a speed of 1440r / min, which can provide sufficient power to move the placement platform 5. The output shaft of the drive motor 14 passes through the mounting block and is fixedly connected to a gear 15. The upper end of the base plate 1 is fixedly connected to a rack plate 3 that cooperates with the gear 15. The base plate 1 is embedded in the soil, and the inner bottom of the placement groove 6 is flush with the ground.

[0023] Among them, two limiting blocks 7 are fixedly connected to the inner bottom of the placement groove 6. The thickness of the limiting block 7 is the difference between the outer diameter and the inner diameter of the core tube. This size design can fit tightly to the core tube and play a precise positioning role when placing the core tube, ensuring the stability and accuracy of the hydraulic rod 11 pushing the push plate 12 to push out the rock core.

[0024] The push plate 12 is hollow inside, and an annular groove is provided on the outer side of the push plate 12. The inner wall of the annular groove is provided with multiple water outlets. A water tank 8 and a water pump 9 are installed on the upper end of the placement platform 5. The inlet end of the water pump 9 is connected to the bottom space of the water tank 8, and the outlet end of the water pump 9 is connected to the internal space of the push plate 12 through a hose 13. The water outlets are evenly distributed on the inner wall of the annular groove, with a diameter of 4mm and a spacing of 25mm between adjacent water outlets. The number and distribution of the water outlets have been optimized to ensure that the rinsing water covers the entire area of ​​the inner wall of the core sampler.

[0025] The functional principle of this utility model can be explained by the following operation: The base plate 1 is embedded in the soil so that the bottom of the placement groove 6 is flush with the ground, which enhances the stability of the device and eliminates the height difference of the core extraction; the core tube containing the core is placed in the placement groove 6 and positioned by the limiting block 7; the hydraulic rod 11 is activated to push the push plate 12 to push the core smoothly out of the core tube to the ground; after the core extraction is completed, the core tube is removed, the drive motor 14 is controlled to run, and the placement platform 5 is moved laterally along the slide rail 2 by the meshing of the gear 15 and the rack plate 3; then a new core tube is placed in the placement groove 6 for core extraction. This cycle is repeated so that the cores are arranged sequentially on the ground.

[0026] After the core is pushed out, the hydraulic rod 11 drives the push plate 12 to move back. At the same time, the water pump 9 delivers water from the water tank 8 to the inside of the push plate 12 through the hose 13. The water is then used to flush the inner wall of the core tube through the outlet on the inner wall of the annular groove, removing residual rock debris and mud. The whole process is highly automated, with smooth and efficient operation, achieving neat arrangement of the cores and automatic cleaning of the core tube.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A core extraction device for an oil drilling core sampler, comprising a base plate (1), characterized in that: The upper end of the base plate (1) is fixedly connected to two slide rails (2), and each slide rail (2) is slidably connected to a slider (4). The upper ends of the two sliders (4) are fixedly connected to a placement platform (5). The upper end of the placement platform (5) is provided with a placement groove (6). The left side of the placement platform (5) is fixedly connected to an L-shaped block (10), and the right side of the L-shaped block (10) is fixedly connected to a hydraulic rod (11). The telescopic end of the hydraulic rod (11) is fixedly connected to a push plate (12). The rear side of the placement platform (5) is fixedly connected to an installation block. The upper end of the installation block is equipped with a drive motor (14). The output shaft of the drive motor (14) passes through the installation block and is fixedly connected to a gear (15). The upper end of the base plate (1) is fixedly connected to a rack plate (3) that cooperates with the gear (15).

2. The core extraction device for an oil drilling core sampler according to claim 1, characterized in that: Two limiting blocks (7) are fixedly connected to the inner bottom of the placement groove (6).

3. The core extraction device for an oil drilling core sampler according to claim 1, characterized in that: The inside of the push plate (12) is hollow, and the outer side of the push plate (12) is provided with an annular groove, and the inner wall of the annular groove is provided with multiple water outlets.

4. The core extraction device for an oil drilling core sampler according to claim 1, characterized in that: The upper end of the placement platform (5) is equipped with a water tank (8) and a water pump (9). The inlet end of the water pump (9) is connected to the bottom space of the water tank (8), and the outlet end of the water pump (9) is connected to the internal space of the push plate (12) through a hose (13).

5. The core extraction device for an oil drilling core sampler according to claim 1, characterized in that: The base plate (1) is embedded in the soil, and the bottom of the placement groove (6) is flush with the ground.

6. The core extraction device for an oil drilling core sampler according to claim 2, characterized in that: The thickness of the limiting block (7) is the difference between the outer diameter and the inner diameter of the core tube.

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