Rotary petroleum exploration core sampler

Abstract

The utility model relates to the field of exploration sampling technology provides a kind of rotary petroleum exploration core sampler to solve the problem such as the poor cutting flexibility of traditional core sampler, clamping is not stable, sampling efficiency is low.The sampler moves seat by electric guide rail drive, drives pivot and multiple cutting sheet flexible adjustment cutting position, adapt to different size shape's core block;Rotary table is rotated by second motor drive, realize multi-angle cutting, need not manual adjustment;Clamping assembly adopts two clamps synchronous movement of bidirectional screw drive, rubber pad increases friction, prevents core block sliding;Knocking assembly utilizes the power of first motor, moves up and down by cam driving split cutter, knocks the core block after cutting and realizes separation, need not additional power source.The sampler improves cutting efficiency and sample quality, reduces labour intensity, is applicable to the core sampling work in petroleum exploration, meets the efficient, accurate, safe sampling demand.

Description

Technical Field

[0001] This utility model relates to the field of exploration and sampling technology, and in particular to a rotary petroleum exploration core sampler. Background Technology

[0002] In the field of geological exploration, especially in oil exploration, core sampling is a crucial task. Accurately obtaining core samples can provide key information for analyzing the structure, composition, and physical properties of underground rock strata, thereby helping to assess oil reserves and determine extraction plans. However, existing core samplers have many shortcomings in practical applications and cannot meet the requirements for efficient, accurate, and safe sampling.

[0003] Traditional core samplers lack flexibility in cutting core blocks. The position of the cutting components is usually fixed, making it difficult to adjust them flexibly according to the actual size and shape of the core block. This results in either incomplete cutting or frequent manual adjustment of the core block position when dealing with core blocks of different sizes. This is not only cumbersome to operate, but also greatly reduces sampling efficiency. In addition, it is not convenient to cut larger core blocks into blocks.

[0004] Regarding core block clamping, the existing sampler's clamping components have a simple structure. Due to the irregular surface of the core, uneven clamping force or insecure clamping can easily cause the core block to slide or shift during the cutting process, thus affecting the cutting accuracy and potentially damaging the core block, making it impossible to obtain a complete sample. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a rotary petroleum exploration core sampler.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A rotary petroleum exploration core sampler, used for core sampling in geological exploration, includes: Base; Two electric guide rails are mounted on top of the base; Two movable seats are slidably mounted on the electric guide rail, and the electric guide rail drives the movable seats to move to adjust the cutting position; A rotating shaft is rotatably mounted between the two movable seats via a bearing. A first motor is fixed on one of the movable seats, and its output end is connected to the rotating shaft. Multiple cutting blades are fixedly sleeved on the rotating shaft for cutting core blocks; The turntable is rotatably mounted within the base via an annular guide rail; The second motor is fixed to the bottom of the base, and its output end is connected to the turntable; A clamping assembly, disposed on the turntable, is used to clamp core blocks; The first motor drives the rotating shaft to rotate, thereby driving the cutting blade to cut the core block, and the second motor drives the turntable to rotate, thereby adjusting the angle of the core block and achieving multi-angle cutting.

[0007] As a further improvement to the above technical solution: The clamping assembly includes a support platform fixedly mounted on the top of the turntable. A bidirectional screw is rotatably mounted inside the support platform via bearings. Two clamping plates are slidably mounted on the top of the turntable via two second guide rails. The two clamping plates are located on both sides of the support platform. The two clamping plates are respectively threaded onto the two threaded sections of the bidirectional screw. A wrench is inserted into one end of the bidirectional screw. The wrench is rotated to drive the bidirectional screw to rotate, causing the two clamping plates to move synchronously to clamp or release the core block.

[0008] The clamping plate has a clearance groove on one side corresponding to the cutting blade, and a rubber pad is fixedly provided on one side of the clamping plate. The relief groove provides cutting space for the cutting blade, and the rubber pad increases friction to prevent the core block from sliding.

[0009] It also includes a striking component, which includes a second sliding rod that slides through the shaft, a sliding blade fixedly disposed at the bottom of the second sliding rod, and a transmission component that cooperates with the rotating shaft at the top of the second sliding rod; The transmission assembly drives the second sliding rod to move up and down, so that the cutting blade can strike the cut core block to achieve separation.

[0010] The transmission assembly includes a connecting bar fixedly disposed on the top of the second sliding rod, a first sliding rod fixedly disposed at the bottom of the connecting bar, and a cam that cooperates with the first sliding rod fixedly sleeved on the outer wall of the rotating shaft; When the rotating shaft rotates, the cam pushes the first sliding rod to move, which in turn drives the second sliding rod to rise and fall through the connecting bar.

[0011] A positioning pin is inserted into the outer wall of the second sliding rod, and the positioning pin is used to limit the second sliding rod to prevent it from moving when not in operation.

[0012] The width of the rubber pad is smaller than the distance between two adjacent clearance grooves to avoid interference with the cutting disc.

[0013] A counterweight is welded between the cutting blade and the second sliding rod. The counterweight increases the impact energy to separate the core block.

[0014] In this utility model, a rotary petroleum exploration core sampler has two movable seats that slide on the top of the base via electric guide rails during the cutting process. This drives the rotating shaft and multiple fixed cutting blades to move, allowing for flexible adjustment of the cutting position to adapt to core blocks of different sizes and shapes. This improves the applicability and flexibility of the cutting process. The first motor drives the rotating shaft to rotate, providing stable power to the cutting blades and ensuring that the cutting process is efficient and stable, effectively improving cutting efficiency and reducing cutting time.

[0015] In this utility model, a rotary petroleum exploration core sampler has a turntable that is rotatably mounted in a base via a ring guide rail and is driven by a second motor. This motor can rotate the core block held on the clamping assembly, allowing the cutting blade to cut the core block at multiple angles. This eliminates the need for manual adjustment of the core block's position, reduces labor intensity, and improves the comprehensiveness and accuracy of the cutting, ensuring the quality of the obtained core samples.

[0016] In this utility model, a rotary petroleum exploration core sampler has a clamping assembly in which a bidirectional screw is rotatably mounted inside a support platform. Two clamping plates are slidably mounted on the top of the turntable via a second guide rail and are threaded onto the two threaded sections of the bidirectional screw. By rotating the bidirectional screw with a wrench, the two clamping plates can be moved simultaneously to the center or sides, quickly and stably clamping or releasing the core block. The operation is simple and improves sampling efficiency. The clearance groove on one side of the clamping plate corresponds to the cutting blade, providing cutting space for the cutting blade and avoiding interference between the clamping plate and the cutting blade, ensuring a smooth cutting process. The rubber pad increases the friction between the clamping plate and the core block, preventing the core block from sliding during cutting and also acting as a buffer to reduce damage to the core block and protect the integrity of the core sample.

[0017] In this utility model, a rotary petroleum exploration core sampler is described. The striking component works in conjunction with the rotating shaft. Driven by the power of a first motor, when the rotating shaft rotates, a cam fixedly sleeved on its outer wall engages with a first sliding rod. Through a connecting strip, the second sliding rod slides up and down, thereby causing the sliding blade to strike the cut core blocks, achieving the separation of the core blocks. By utilizing the power of the first motor, no additional power source is required, reducing equipment costs and energy consumption. At the same time, it improves the integration and automation of the equipment. The positioning pin inserted into the outer wall of the second sliding rod can limit the movement of the second sliding rod, preventing the sliding blade from moving arbitrarily when not in operation, ensuring the safety and stability of the equipment. Attached Figure Description

[0018] Figure 1This is a three-dimensional structural diagram of a rotary petroleum exploration core sampler proposed in this utility model. Figure 2 This is a schematic diagram of the base and cutting blade structure of a rotary petroleum exploration core sampler proposed in this utility model. Figure 3 This is a schematic diagram of the base and turntable structure of a rotary petroleum exploration core sampler proposed in this utility model; Figure 4 This is a cross-sectional structural diagram of the protective cover of a rotary petroleum exploration core sampler proposed in this utility model. Figure 5 This is a schematic diagram of the slitting blade structure of a rotary petroleum exploration core sampler proposed in this utility model; Figure 6 This is a schematic diagram of the slitting blade and cutting seam structure of a rotary petroleum exploration core sampler proposed in this utility model.

[0019] In the diagram: 1. Base; 2. Protective cover; 3. Top cover; 4. Electric guide rail; 5. Moving seat; 6. Rotating shaft; 7. Cutting blade; 8. First motor; 9. Support platform; 10. Clamping plate; 11. Relief groove; 12. Rubber pad; 13. Double-acting screw; 14. Second guide rail; 15. Wrench; 16. Sliding blade; 17. Turntable; 18. Second motor; 19. First sliding rod; 20. Second sliding rod; 21. Positioning pin; 22. Connecting strip; 23. Counterweight; 24. Cam. Detailed Implementation

[0020] 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.

[0021] Example 1

[0022] Reference Figures 1-6A sampler comprises core components including a base 1, movable seats 5, a rotating shaft 6, a cutting disc 7, a turntable 17, a protective cover 2, and a top cover 3. The base 1 is a rectangular steel frame structure with two parallel electric guide rails 4 mounted on the top. The electric guide rails 4 are bolted to the upper surface of the base 1 and use THK brand SHS35C ball bearing guides with an effective stroke of 1000mm. The two movable seats 5 are connected to the sliders of the electric guide rails 4 and move horizontally driven by servo motors. The spacing between the movable seats 5 is adjustable from 200mm to 800mm to accommodate core blocks of different diameters. The rotating shaft 6 is mounted at both ends in the central holes of the movable seats 5 using deep groove ball bearings. The surface of the rotating shaft 6 is hardened to a hardness of HRC50-55 to ensure resistance to deformation during cutting. The first motor 8 is fixed to the outside of the right movable seat 5 by M8 bolts. The motor output shaft and the rotating shaft 6 are connected by a coupling with a transmission ratio of 1:1. The speed of the rotating shaft 6 can be adjusted in the range of 500-3000 rpm by a frequency converter.

[0023] Five diamond cutting blades 7 are evenly spaced on the rotating shaft 6. Each blade 7 is 2.5mm thick, 300mm in outer diameter, and 100mm apart. The blades 7 are fixed to the rotating shaft 6 via keyways and locked with end caps to prevent loosening during cutting. An annular guide rail is installed inside the base 1. The turntable 17 is mounted on the annular guide rail via a thrust ball bearing. The second motor 18 is bolted to the center of the bottom of the base 1. The motor output shaft passes through the base 1 and is connected to the center hole of the turntable 17 via a flat key. The rotation angle accuracy of the turntable 17 can reach ±0.5°.

[0024] The clamping assembly on the turntable 17 consists of a support platform 9, a double-acting screw 13, clamping plates 10, and a wrench 15. The support platform 9 is made of structural steel and is fixed to the center of the turntable 17 with bolts. The double-acting screw 13 is mounted inside the turntable via bearings. The double-acting screw 13 has two sections with opposite threads, each with a thread length of 250 mm and a lead of 4 mm. The bottom of the two clamping plates 10 has sliding grooves that slide in conjunction with the second guide rail 14 on the turntable 17. Three clearance grooves 11 are formed on the inner side of the clamping plates 10. The clearance grooves 11 are 35 mm wide and 20 mm deep to avoid the cutting disc 7. A nitrile rubber pad 12 is attached to the inner side of the clamping plate 10. The rubber pad 12 is 5mm thick, has a Shore hardness of 60±5, and is 80mm wide, which is smaller than the 120mm spacing between adjacent clearance grooves 11. This ensures that the cutting blade 7 does not interfere with the passage and allows the rubber pad 12 to hold irregularly shaped cores, ensuring that the cores do not loosen during the cutting process. A square-headed insertion hole is provided at the end of the bidirectional screw 13. After inserting the wrench 15, the screw can be manually rotated to realize the synchronous movement of the two clamping plates 10 in opposite directions. The clamping force is adjustable from 0-500N.

[0025] The protective cover 2 is made of tempered glass and is connected to the left side of the base 1 by a hinge. A metal top cover 3 is welded to the top of the protective cover 2. The top cover 3 and the protective cover 2 form a closed space to prevent rock chips from flying during cutting, while also allowing observation of the internal cutting process.

[0026] This application can be used in the field of exploration and sampling, or in other fields applicable to this application.

[0027] Example 2

[0028] refer to Figures 1-6 A rotary petroleum exploration core sampler is applied in the field of exploration sampling. A striking component is installed on the top cover 3. A second sliding rod 20 passes through the central hole of the top cover 3. The diameter of the central hole is 0.5 mm larger than that of the second sliding rod 20 to ensure smooth sliding. A slitting blade 16 is welded to the bottom of the second sliding rod 20. The slitting blade 16 has a cutting edge angle of 30°, a length of 150 mm, and is shaped like a grid. A connecting strip 22 is welded to the top of the second sliding rod 20. A first sliding rod 19 is vertically welded to the bottom of the connecting strip 22. The first sliding rod 19 slides with the top cover 3, limiting the movement of the slitting blade 16 and preventing rotation during lifting and lowering. A cam 24 is fixedly installed on the rotating shaft 6. The cam 24 has a base circle radius of 50 mm and a stroke of 10 mm. When the rotating shaft 6 rotates, the cam 24 pushes the first sliding rod 19 to move up and down reciprocally. This, through the connecting strip 22, drives the second sliding rod 20 to move synchronously. The impact frequency of the slitting blade 16 is synchronized with the rotation speed of the rotating shaft 6. A positioning pin 21 is provided in the middle of the second sliding rod 20. After the positioning pin 21 is inserted, it can limit the stroke of the second sliding rod 20. The positioning pin 21 has a diameter of 8mm and an insertion depth of 15mm, ensuring that the slitting blade 16 is kept in a high position when not in operation, and preventing the slitting blade 16 from contacting the cutting disc 7. A counterweight 23 is welded between the slitting blade 16 and the second sliding rod 20. The counterweight 23 has a mass of 2kg and is used to increase the impact energy to ensure effective separation of the core block.

[0029] First, turn on the power to the device, place the core block on the support platform 9, and turn the wrench 15 to drive the double screw 13 to rotate. The rotation of the double screw 13 can drive the two clamping plates 10 to move closer to each other through the thread. During the process of moving closer, the core block is clamped and fixed by the rubber pad 12. Flip the protective cover 2 so that it covers the base 1, start the first motor 8 to drive the rotating shaft 6 to rotate, and drive the cutting blade 7 to rotate during the rotation of the rotating shaft 6. At the same time, start the electric guide rail 4 to drive the moving seat 5 to move, so that the cutting blade 7 can rotate and move at the same time to cut the core block. After the vertical cutting is completed, the second motor 18 is started to drive the turntable 17 to rotate, which can drive the core block to rotate until it rotates to 90 degrees. Then, the cutting blade 7 is controlled to move and rotate to cut the core block longitudinally, so that the top of the core block forms a cross-cutting seam. Pull out the positioning pin 21. At this time, the second sliding rod 20 can move downward under the gravity of the counterweight 23, and drive the first sliding rod 19 downward using the connecting strip 22, so that the first sliding rod 19 is above the cam 24, while the slitting blade 16 abuts against the cutting seam. Start the first motor 8 to drive the rotating shaft 6 to rotate. During the rotation of the rotating shaft 6, the cam 24 drives the first sliding rod 19 to move upward, thereby driving the slitting blade 16 to move upward. When the convex part of the cam 24 moves away from the first sliding rod 19, the counterweight 23 can return to its original position under gravity and strike the core block, breaking the cut core block and realizing sampling.

[0030] 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 rotary petroleum exploration core sampler, used for core sampling in geological exploration, characterized in that, include: Base (1); Two electric guide rails (4) are disposed on the top of the base (1); Two movable seats (5) are slidably mounted on the electric guide rail (4), and the electric guide rail (4) drives the movable seats (5) to move to adjust the cutting position; The rotating shaft (6) is rotatably mounted between the two movable seats (5) via bearings; The first motor (8) is fixed on one of the movable seats (5), and its output end is connected to the rotating shaft (6); Multiple cutting blades (7) are fixedly sleeved on the rotating shaft (6) for cutting core blocks; The turntable (17) is rotatably mounted inside the base (1) via a ring guide rail; The second motor (18) is fixed to the bottom of the base (1), and its output end is connected to the turntable (17); A clamping assembly is disposed on the turntable (17) for clamping core blocks; The first motor (8) drives the rotating shaft (6) to rotate so as to drive the cutting blade (7) to cut the core block, and the second motor (18) drives the turntable (17) to rotate so as to adjust the angle of the core block and realize multi-angle cutting.

2. The rotary petroleum exploration core sampler according to claim 1, characterized in that, The clamping assembly includes a support platform (9) fixedly mounted on the top of the turntable (17). A bidirectional screw (13) is rotatably mounted inside the support platform (9) via a bearing. Two clamping plates (10) are slidably mounted on the top of the turntable (17) via two second guide rails (14). The two clamping plates (10) are located on both sides of the support platform (9). The two clamping plates (10) are respectively threaded onto the two threaded sections of the bidirectional screw (13). A wrench (15) is inserted into one end of the bidirectional screw (13). The wrench (15) is rotated to drive the bidirectional screw (13) to rotate, so that the two clamping plates (10) move synchronously to clamp or release the core block.

3. The rotary petroleum exploration core sampler according to claim 2, characterized in that, The clamping plate (10) has a relief groove (11) on one side corresponding to the cutting blade (7), and a rubber pad (12) is fixedly provided on one side of the clamping plate (10). The relief groove (11) provides cutting space for the cutting blade (7), and the rubber pad (12) increases friction to prevent the core block from sliding.

4. The rotary petroleum exploration core sampler according to claim 1, characterized in that, It also includes a striking component, which includes a second sliding rod (20) that is slidably disposed through the rod. A sliding blade (16) is fixedly disposed at the bottom of the second sliding rod (20), and a transmission component that works in conjunction with the rotating shaft (6) is disposed at the top of the second sliding rod (20). The transmission assembly drives the second sliding rod (20) to move up and down, so that the cutting blade (16) can strike the cut core block to achieve separation.

5. The rotary petroleum exploration core sampler according to claim 4, characterized in that, The transmission assembly includes a connecting strip (22) fixedly disposed on the top of the second sliding rod (20), a first sliding rod (19) fixedly disposed at the bottom of the connecting strip (22), and a cam (24) that cooperates with the first sliding rod (19) is fixedly sleeved on the outer wall of the rotating shaft (6). When the rotating shaft (6) rotates, the cam (24) pushes the first sliding rod (19) to move, and drives the second sliding rod (20) to rise and fall through the connecting strip (22).

6. The rotary petroleum exploration core sampler according to claim 5, characterized in that, A positioning pin (21) is inserted into the outer wall of the second sliding rod (20). The positioning pin (21) is used to limit the second sliding rod (20) to prevent it from moving when not in operation.

7. The rotary petroleum exploration core sampler according to claim 3, characterized in that, The width of the rubber pad (12) is smaller than the distance between two adjacent relief grooves (11) to avoid interference with the cutting disc (7).

8. The rotary petroleum exploration core sampler according to claim 5, characterized in that, A counterweight (23) is welded between the cutting blade (16) and the second sliding rod (20), and the counterweight (23) increases the impact energy to separate the core block.

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