An automatic oil sample collection device for exploration wells

Abstract

This utility model discloses an automatic oil sample collection device for exploration wells, belonging to the field of oil well sampling. It includes a fixed frame, with a winding roller rotatably connected to the top of the frame. A cable is wound around the outer wall of the winding roller, and a sampling cylinder is fixedly connected to the end of the cable. An oil suction port is located at the bottom center of the sampling cylinder. A hydraulic cylinder is fixedly connected to the upper part of the sampling cylinder, and a piston disc is fixedly connected to the output end of the hydraulic cylinder. In this design, as the piston disc moves upward, the oil sample enters the sampling cylinder under the action of a pressure difference. After sampling, a sealing plate closes, sealing the oil sample inside the sampling cylinder. This effectively prevents oil sample leakage or external contamination, especially avoiding sample leakage caused by vibration when the winding roller moves the sampling cylinder upward. This ensures the representativeness and purity of the collected oil sample, providing a reliable sample basis for subsequent oil sample testing and guaranteeing the accuracy of the test results.

Description

Technical Field

[0001] This utility model relates to the field of oil well sampling, and more specifically, to an automatic oil sample collection device for exploration wells. Background Technology

[0002] In the process of oil extraction and production, oil sampling is a key step in understanding the production status of oil wells and analyzing the properties of oil. Its accuracy and efficiency directly affect the optimization of subsequent extraction plans and the results of quality testing.

[0003] In the prior art, such as Chinese patent "CN210829244U", an "oil sample collection device for oil wells" is proposed, which includes a placement frame. A forward and reverse motor is fixedly installed on one side of the top of the placement frame. A transmission shaft is fixedly sleeved on the output shaft of the forward and reverse motor. A winding wheel is fixedly sleeved on the outside of the transmission shaft. A support plate is movably sleeved on the end of the transmission shaft. A protective cover is fixedly connected to the other side of the top of the placement frame. A storage battery is fixedly installed inside the protective cover. A wire is fixedly connected to one side of the top of the storage battery.

[0004] However, in the aforementioned patent, when the piston's output end moves to the top, the oil suction port below the collection box lacks an effective sealing structure. This makes it easy for the oil sample inside the collection box to leak from the oil suction port during the process of the collection box being lifted, due to the vibration or posture change of the device. This not only causes the loss of the oil sample but also affects the accuracy and representativeness of the sampling. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide an automatic crude oil sample collection device for exploration wells, which can realize the function of sealing the sampling tube after sampling.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An automatic crude oil sample collection device for exploration wells includes a fixed frame, a winding roller rotatably connected to the top of the fixed frame, a cable wound around the outer wall of the winding roller, a sampling cylinder fixedly connected to the end of the cable, an oil suction port at the bottom center of the sampling cylinder, a hydraulic cylinder fixedly connected to the top inside the sampling cylinder, a piston disc fixedly connected to the output end of the hydraulic cylinder, the piston disc slidably connected inside the sampling cylinder, two No. 2 racks fixedly connected to the top of the piston disc, and four sliding bars fixedly connected to the top inside the sampling cylinder, with the two No. 2 racks slidably connected to the two sliding bars respectively.

[0008] Furthermore, the outer walls of the other two slide bars are slidably connected to racks of the first rank, and both racks of the first rank are slidably connected to the piston disc. The inside of the sampling cylinder is rotatably connected to two gears, which are respectively located between the two sets of racks of the first rank and racks of the second rank, and the racks of the first rank and racks of the second rank are respectively meshed on both sides of the gears.

[0009] Furthermore, the lower ends of both of the first racks are rotatably connected to connecting rods, and the ends of the two connecting rods away from the first racks are rotatably connected to sealing plates. The two sealing plates are slidably connected to the lower part of the sampling cylinder.

[0010] Furthermore, a motor is fixedly connected to the outside of the fixing frame, and the output end of the motor is fixedly connected to one end of the winding roller.

[0011] Furthermore, a fixing plate is fixedly connected to the middle of the fixing frame, and a through groove is opened in the middle of the fixing plate. The fixing plate is located above the sampling cylinder, and the cable is located inside the through groove. A cleaning brush is rotatably connected to the upper middle part of the fixing plate.

[0012] Furthermore, the cable is located inside the cleaning brush, a worm gear is fixedly connected to the outer wall of the cleaning brush, a worm is rotatably connected to the middle of the fixing frame, a chain is installed between one end of the worm and one end of the winding roller, an annular tube is fixedly connected to the lower part of the fixing plate, and multiple nozzles are fixedly connected to the inner wall of the annular tube.

[0013] Furthermore, the cable is located inside the annular tube, a water tank and a water pump are fixedly connected to the lower part of the fixing frame, a connecting pipe is fixedly connected between the input end of the water pump and the water tank, a conduit is fixedly connected to the output end of the water pump, the conduit is fixedly connected to one side of the annular tube, and casters and a push handle are fixedly connected to the lower and middle parts of the fixing frame, respectively.

[0014] Compared with existing technologies, the advantages of this utility model are: (1) In this scheme, during the upward movement of the piston disc, the oil sample enters the sampling cylinder under the action of pressure difference; after sampling is completed, the sealing plate closes to seal the oil sample in the sampling cylinder, which can effectively prevent oil sample leakage or external contamination. In particular, it can avoid sample leakage caused by vibration when the winding roller drives the sampling cylinder to move upward, ensuring that the collected oil sample is representative and pure, providing a reliable sample basis for subsequent oil sample testing, and ensuring the accuracy of the test results. (2) In this scheme, when recycling cables, the winding roller drives the worm gear to rotate through the chain, which in turn drives the cleaning brush to rotate through the worm wheel meshing with the worm gear, cleaning the surface of the cable and improving the cleanliness of the cable surface after recycling; at the same time, the water pump sends water from the water tank into the ring pipe through the conduit, and sprays the cable with the nozzle to clean it. This dual cleaning method can remove oil, dust and other impurities from the surface of the cable, prevent impurities from entering the device and causing wear or pollution of the components, and extend the service life of the cable and the entire device. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram showing the positional relationship between the oil suction port and the sampling cylinder in this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of the sampling cylinder in this utility model.

[0018] Figure 4 This is a schematic diagram showing the positional relationship between the piston disc and the second rack in this utility model.

[0019] Figure 5 This is a schematic diagram of the rack structure in this utility model.

[0020] Figure 6 for Figure 1 A magnified structural diagram of region A in the middle.

[0021] Figure 7 This is a schematic diagram showing the connection between the cleaning brush and the fixing plate in this utility model.

[0022] The following are the labels in the diagram: 1. Fixing frame; 11. Caster wheel; 12. Push handle; 13. Winding roller; 14. Cable; 15. Motor; 16. Fixing plate; 17. Sampling cylinder; 18. Oil suction port; 19. Hydraulic cylinder; 2. Piston disc; 21. Sliding strip; 22. Rack No. 1; 23. Gear; 24. Rack No. 2; 25. Connecting rod; 26. Sealing plate; 27. Through groove; 28. Cleaning brush; 29. ​​Worm gear; 3. Worm; 31. Chain; 32. Annular tube; 33. Nozzle; 34. Conduit; 35. Water pump; 36. Connecting pipe; 37. Water tank. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Example 1: Please see Figures 1-7An automatic crude oil sample collection device for exploration wells includes a fixed frame 1. A winding roller 13 is rotatably connected to the top of the fixed frame 1. A cable 14 is wound around the outer wall of the winding roller 13. A sampling cylinder 17 is fixedly connected to the end of the cable 14. An oil suction port 18 is opened in the middle of the bottom end of the sampling cylinder 17. A hydraulic cylinder 19 is fixedly connected to the upper part of the inside of the sampling cylinder 17. A piston disc 2 is fixedly connected to the output end of the hydraulic cylinder 19. The piston disc 2 is slidably connected inside the sampling cylinder 17. Two second-order racks 24 are fixedly connected to the top of the piston disc 2. Four sliding strips 21 are fixedly connected to the upper part of the inside of the sampling cylinder 17. The two second-order racks 24 are slidably connected to the two sliding strips 21 respectively. The other two sliding strips 24 are slidably connected to the two sliding strips 21 respectively. A first rack 22 is slidably connected to the outer wall of the sampling cylinder 17. Both first racks 22 are slidably connected to the piston disc 2. Two gears 23 are rotatably connected inside the sampling cylinder 17. The two gears 23 are located between the two sets of first racks 22 and second racks 24, respectively. The first racks 22 and second racks 24 are meshed on both sides of the gears 23. The lower ends of the two first racks 22 are rotatably connected to connecting rods 25. The ends of the two connecting rods 25 away from the first racks 22 are rotatably connected to sealing plates 26. The two sealing plates 26 are slidably connected to the lower part of the sampling cylinder 17. A motor 15 is fixedly connected to the outside of the fixed frame 1. The output end of the motor 15 is fixedly connected to one end of the winding roller 13.

[0027] In this embodiment, the device uses a motor 15 to drive the winding roller 13 to rotate, thereby enabling the cable 14 to be wound and unwound, and thus controlling the lifting and lowering of the sampling cylinder 17. This eliminates the need for manual operation in the well, greatly reducing the intensity of manual labor and avoiding potential safety risks during manual sampling, making oil sample collection safer and more efficient. In terms of sampling accuracy and sealing performance, during sampling, the hydraulic cylinder 19 drives the piston disc 2 to slide inside the sampling cylinder 17. When the piston disc 2 moves upward, it drives the second rack 24 to move upward synchronously along the slide bar 21. Through the transmission action of the gear 23, the first rack 22 moves downward, which in turn drives the two sealing plates 26 to approach each other through the connecting rod 25, thereby sealing the oil suction port 18. This linkage structure can accurately control the sampling timing and sealing action, ensuring that the collected oil sample is representative. Moreover, the sealing plate 26 has a good sealing effect on the oil suction port 18, which can effectively prevent the oil sample from leaking or being contaminated during the lifting process, ensuring the purity of the oil sample and the accuracy of the test results. In terms of structural stability and reliability, the four sliders 21 provide stable guidance for the second rack 24 and the first rack 22, making the rack movement smoother, reducing shaking and deviation during transmission, and ensuring the smoothness of the entire sampling action.

[0028] Example 2: Please see Figures 1-7An automatic crude oil sample collection device for exploration wells includes a fixed plate 16 fixedly connected to the middle of a fixed frame 1. A through groove 27 is formed in the middle of the fixed plate 16, which is positioned above a sampling cylinder 17. A cable 14 is located inside the through groove 27. A cleaning brush 28 is rotatably connected to the upper middle of the fixed plate 16, with the cable 14 located inside the cleaning brush 28. A worm gear 29 is fixedly connected to the outer wall of the cleaning brush 28. A worm 3 is rotatably connected to the middle of the fixed frame 1, with one end of the worm 3 and one end of a winding roller 13 connected together. There is a chain 31, and a ring tube 32 is fixedly connected to the bottom of the fixing plate 16. Multiple nozzles 33 are fixedly connected to the inner wall of the ring tube 32. The cable 14 is located inside the ring tube 32. A water tank 37 and a water pump 35 are fixedly connected to the bottom of the fixing frame 1. A connecting pipe 36 is fixedly connected between the input end of the water pump 35 and the water tank 37. A conduit 34 is fixedly connected to the output end of the water pump 35. The conduit 34 is fixedly connected to one side of the ring tube 32. A caster wheel 11 and a push handle 12 are fixedly connected to the bottom and middle part of the fixing frame 1, respectively.

[0029] In this embodiment, the fixing plate 16 in the middle of the fixing frame 1 provides stable support for the relevant cleaning components. The cable 14 passes through the through groove 27 in the middle of the fixing plate 16. When the winding roller 13 rotates to wind and unwind the cable 14, it drives the worm gear 3 to rotate through the chain 31. The worm gear 3 meshes with the worm wheel 29 on the outer wall of the cleaning brush 28, so that the cleaning brush 28 rotates synchronously and wipes and cleans the cable 14 passing through it. At the same time, the inner wall of the annular tube 32 below the fixing plate 16 is provided with multiple nozzles 33. The water pump 35 draws water from the water tank 37 through the connecting pipe 36 and sends it into the annular tube 32 through the conduit 34. The nozzles 33 spray and clean the cable 14 located inside the annular tube 32. This cleaning method that combines mechanical wiping and spraying can effectively remove oil, dust and other impurities attached to the surface of the cable 14.

[0030] Working principle: The device can be flexibly moved to the target oil well by the push handle 12 in the middle of the fixed frame 1 and the universal wheel 11 below. It can be adjusted to a suitable sampling position. At this time, the cable 14 on the winding roller 13 is in the retracted state, and the sampling cylinder 17 is located below the fixed plate 16, waiting to be lowered into the well for sampling. The motor 15 is started, and its output drives the winding roller 13 to rotate. The winding roller 13 releases the cable 14, which extends downward through the through groove 27 in the middle of the fixed plate 16, causing the sampling cylinder 17 to gradually penetrate deeper into the oil well. When the sampling cylinder 17 reaches the preset sampling depth, the motor 15 stops working, and the sampling cylinder 17 remains in that position. Subsequently, the hydraulic cylinder 19 is started, and its output pushes the piston disc 2 to slide downward inside the sampling cylinder 17. The piston disc 2 drives the second rack 24 to move downward synchronously along the corresponding slide bar 21. Since the second rack 24 meshes with the gear 23, the gear 23 rotates accordingly. This causes the first rack 22, which meshes with it, to move upward along another set of slide bars 21. The first rack 22 pulls the two sealing plates 26 away from each other through the connecting rod 25, so that the oil suction port 18 at the bottom of the sampling cylinder 17 opens. The oil sample in the oil well enters the sampling cylinder 17 through the oil suction port 18 under the action of pressure difference. When enough oil sample is collected in the sampling cylinder 17, the hydraulic cylinder 19 drives the piston disc 2 to move upward, and the second rack 24 moves upward accordingly. Through the gear 23, the first rack 22 moves downward, and the connecting rod 25 pushes the two sealing plates 26 closer together to seal the oil suction port 18 and prevent oil sample leakage. Motor 15 rotates in reverse, driving winding roller 13 to retract cable 14. Sampling cylinder 17 is lifted to the initial position. During the process of winding roller 13 rotating to retract cable 14, one end of winding roller 13 drives worm gear 3 to rotate via chain 31. Worm gear 3 meshes with worm wheel 29 on the outer wall of cleaning brush 28, causing cleaning brush 28 to rotate synchronously and wipe and clean cable 14 passing through it. At the same time, water pump 35 starts and draws cleaning water from water tank 37 through connecting pipe 36 and sends it into annular pipe 32 through conduit 34. Multiple nozzles 33 on the inner wall of annular pipe 32 spray cleaning water onto cable 14 located inside it, spraying and cleaning cable 14 to remove oil and impurities from the surface of cable 14. After cleaning, cable 14 is neatly wound by winding roller 13, completing one oil sample collection operation.

[0031] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. An automatic device for collecting crude oil samples from exploratory wells, comprising a fixed frame (1), characterized in that it comprises: A winding roller (13) is rotatably connected above the fixed frame (1). A cable (14) is wound around the outer wall of the winding roller (13). A sampling cylinder (17) is fixedly connected to the end of the cable (14). An oil suction port (18) is opened in the middle of the bottom end of the sampling cylinder (17). A hydraulic cylinder (19) is fixedly connected to the upper part of the inside of the sampling cylinder (17). A piston disc (2) is fixedly connected to the output end of the hydraulic cylinder (19). The piston disc (2) is slidably connected inside the sampling cylinder (17). Two No. 2 racks (24) are fixedly connected above the piston disc (2). Four slide bars (21) are fixedly connected to the upper part of the inside of the sampling cylinder (17). The two No. 2 racks (24) are slidably connected to the two slide bars (21) respectively.

2. The automatic device for collecting crude oil sample of exploratory well according to claim 1, characterized in that: The outer walls of the other two slide bars (21) are slidably connected to racks (22), and both racks (22) are slidably connected to the piston disc (2). The inside of the sampling cylinder (17) is rotatably connected to two gears (23), and the two gears (23) are respectively located between the two sets of racks (22) and racks (24). The racks (22) and racks (24) are respectively meshed on both sides of the gears (23).

3. The automatic device for collecting crude oil sample of exploratory well according to claim 2, characterized in that: The lower ends of the two racks (22) are rotatably connected to connecting rods (25), and the ends of the two connecting rods (25) away from the racks (22) are rotatably connected to sealing plates (26). The two sealing plates (26) are slidably connected to the lower part of the sampling cylinder (17).

4. The automatic device for collecting crude oil sample of exploratory well according to claim 3, characterized in that: The fixed frame (1) is externally fixedly connected to a motor (15), and the output end of the motor (15) is fixedly connected to one end of the winding roller (13).

5. The automatic device for collecting crude oil sample of exploratory well according to claim 1, characterized in that: A fixing plate (16) is fixedly connected to the middle of the fixing frame (1). A through groove (27) is opened in the middle of the fixing plate (16). The fixing plate (16) is located above the sampling cylinder (17). The cable (14) is located inside the through groove (27). A cleaning brush (28) is rotatably connected to the upper middle of the fixing plate (16).

6. The automatic device for collecting crude oil sample of exploratory well according to claim 5, characterized in that: The cable (14) is located inside the cleaning brush (28). A worm gear (29) is fixedly connected to the outer wall of the cleaning brush (28). A worm (3) is rotatably connected to the middle of the fixing frame (1). A chain (31) is installed between one end of the worm (3) and one end of the winding roller (13). An annular tube (32) is fixedly connected to the lower part of the fixing plate (16). Multiple nozzles (33) are fixedly connected to the inner wall of the annular tube (32).

7. The automatic crude oil sample collection device for exploration wells according to claim 6, characterized in that, The cable (14) is located inside the annular tube (32). A water tank (37) and a water pump (35) are fixedly connected below the fixing frame (1). A connecting pipe (36) is fixedly connected between the input end of the water pump (35) and the water tank (37). A conduit (34) is fixedly connected to the output end of the water pump (35). The conduit (34) is fixedly connected to one side of the annular tube (32). A caster wheel (11) and a push handle (12) are fixedly connected to the bottom and middle part of the fixing frame (1), respectively.

Images