A kind of oil layer sampling equipment for oil production samples

Abstract

The present invention belongs to the technical field of oil sampling, and in particular, is a kind of oil layer sampling equipment for oil extraction samples, including a base, a support frame symmetrically arranged on the upper surface of the base, a driving mechanism arranged on the upper surface of the base, and the driving mechanism including a wire roller and a cable roller, and the two ends of the wire roller and the two ends of the cable roller are respectively rotatably connected to the inner side surfaces of the two support frames. The equipment, by providing fan blades and sealing components, can loosen the surrounding oil to a certain extent for high-viscosity oil layers through the rotation of the fan blades, reduce the resistance of the equipment to descend, so that the descent speed of the equipment will not produce large fluctuations due to sudden changes in the viscosity of the oil layer, which is conducive to maintaining a stable descent speed for sampling. At the same time, the sealing component cooperates with the enclosed space formed by the protective cover, and the enclosed space is filled with oil, which can increase the weight of the entire equipment, thereby further regulating the descent speed of the oil extraction device.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum sampling, in particular to a petroleum production sample oil layer sampling device. Background Art

[0002] During oil extraction, sampling helps to understand the characteristics of the reservoir. By taking samples from different depths in the oil well, the layered structure of the reservoir can be determined, such as which depths are oil layers and which are water layers or gas layers. By analyzing the composition and properties of the oil layer samples, the pressure, temperature and flow characteristics of the fluid in the reservoir can be inferred.

[0003] In the prior art, when the oil extraction equipment descends, it mainly relies on its own gravity to overcome the resistance of the oil. When encountering high-viscosity oil or complex oil layer structure, there is a lack of effective speed adjustment mechanism, and the descent speed will be greatly affected, thereby affecting the accuracy of sampling.

[0004] In view of the above problems, the present invention proposes an oil layer sampling device for oil production samples. Summary of the invention

[0005] Based on the existing oil sampling technology problems, the present invention proposes an oil layer sampling device for oil production samples.

[0006] The present invention proposes an oil layer sampling device for petroleum extraction samples, comprising a base, a support frame is symmetrically arranged on the upper surface of the base, a driving mechanism is arranged on the upper surface of the base, the driving mechanism comprises a wire roller and a cable roller, both ends of the wire roller and the two ends of the cable roller are respectively rotatably connected to the inner side surfaces of the two support frames, one end of the wire rope of the wire roller is fixedly connected to an oil extraction device, the oil extraction device comprises a protective cover, an isolation plate is fixedly connected to the inner wall of the protective cover, a sealed bearing is embedded in the center of the isolation plate, a motor I is fixedly connected to the upper surface of the isolation plate, the output shaft of the motor I is fixedly connected to the inner ring of the sealed bearing through a coupling, the lower end of the coupling of the motor I is fixedly connected to a rotating tube, a sampling component is arranged inside the rotating tube, and a sealing component is arranged on the periphery of the rotating tube.

[0007] The sampling component is used to sample oil layers at different depths.

[0008] The sealing component is used to seal the oil inside the protective cover.

[0009] Preferably, the inner bottom wall of the bottom end of the protective cover is fixedly connected with a bearing I, the inner ring surface of the bearing I is provided with fan blades in a circular array, the bottom end array of the protective cover is provided with grooves, the inner walls of the adjacent grooves are not connected, the inner wall of each groove is rotatably connected with a blocking block, the upper inner wall of each groove and the upper end contact surface of the blocking block are provided with a spring groove, the inner wall of each spring groove is fixedly connected with a spring, the two ends of the spring are respectively fixedly connected to the upper end of the blocking block and the cover body of the protective cover, the outer surface of the rotating tube is fixedly sleeved with a bearing II, the lower end of the rotating tube is fixedly connected with a sealed bearing II, one end of the fan blades in a circular array are respectively fixedly connected to the outer ring surface of the sealed bearing II, and the outer ring surface of the bearing II is circumferentially fixedly connected with a T-shaped slider.

[0010] Preferably, the sampling component includes an oil pipe, the outer surface of the oil pipe is rotatably connected to the inner wall of the rotating tube via a bearing, the inner wall of the oil pipe is fixedly connected to a cylinder tube, the inner wall of the cylinder tube is fixedly connected to a cylinder, the piston rod of the cylinder is fixedly connected to an L-shaped connecting rod, a sliding groove is provided on the inner wall of the oil pipe, a ejector pin is slidably connected to the inner wall of the sliding groove, one end of the ejector pin is rotatably connected to one end of the L-shaped connecting rod, and the other end of the ejector pin is rotatably connected to a sealing door, the inner wall of the oil pipe corresponding to the sealing door is provided with an oil inlet groove adapted thereto, and the upper and lower ends of the sealing door are respectively hinged to the inner wall of the oil inlet groove.

[0011] Preferably, a sealing layer is applied at the contact point between the sealing door and the oil pipe.

[0012] Preferably, the lower end of the oil pipe is truncated cone-shaped.

[0013] Preferably, the sealing component includes a sealing disk, the surface of the sealing disk is adapted to the inner wall of the protective cover, the outer side surface of the sealing disk is provided with an annular groove, the inner wall of the annular groove is provided with a top block in a circular array, one side of each of the top blocks is fixedly connected to a connecting column, the surface of the connecting column is slidably connected to the disk body of the sealing disk, and one end of the connecting column is slidably connected to a sliding bar.

[0014] Preferably, a groove matching the surface of the T-shaped slider is formed on the back side of the slide bar, the surface of the slide bar is slidably connected to the inner wall of the groove, the upper end of the slide bar is arranged to be protruding, the disk body of the sealing disk is provided with a limiting groove matching the surface of the slide bar, the surface of the slide bar is slidably connected to the inner wall of the limiting groove, the upper end of the slide bar is fixedly connected to a fixing ring, and the inner side surface of the fixing ring is slidably connected to the outer surface of the rotating tube.

[0015] Preferably, the upper end of the fixing ring is symmetrically fixedly connected with connecting rods, the upper end of each connecting rod is rotatably connected with a lever, one end of the lever is fixedly connected with a float, and the supporting point of the lever is fixedly connected to the lower surface of the isolation plate.

[0016] Preferably, the driving mechanism also includes a motor fixed on the upper surface of the base, the output shaft of the motor is fixedly connected to a bevel gear I through a coupling, one end of the cable roller is fixedly connected to a spur gear I, one end of the wire roller is fixedly connected to a spur gear II, the spur gear I and the spur gear II are respectively located on the outside of the support frame, a toothed belt is meshed between the spur gear I and the spur gear II, one end of the cable roller is fixedly connected to a bevel gear II, the surface of the bevel gear II is meshed with the surface of the bevel gear I, the bevel gear II is located on the outside of the spur gear I, and one end of the cable roller is fixedly connected to a cable head.

[0017] Preferably, the material density of the float is smaller than the density of petroleum.

[0018] The beneficial effects of the present invention are:

[0019] 1. By setting the fan blades and sealing components, for high-viscosity oil layers, the rotation of the fan blades can loosen the surrounding oil to a certain extent and reduce the resistance of the equipment's descent, so that the equipment's descent speed will not fluctuate greatly due to sudden changes in the viscosity of the oil layer, which is conducive to maintaining a stable descent speed for sampling. At the same time, the sealing components cooperate with the protective cover to form a closed space, and the closed space is filled with oil, which can increase the weight of the entire equipment, thereby further regulating the descent speed of the oil extraction device.

[0020] 2. By setting up the sampling component, the expansion and contraction of the cylinder piston rod drives the L-shaped connecting rod to move. Since the L-shaped connecting rod is connected to the ejector pin in rotation and the ejector pin slides in the slide slot, this series of linkage can accurately push the sealing door open, thereby starting to collect the oil sample at that depth. This precise mechanical transmission control method ensures that the sampling operation is accurately started at the predetermined depth, avoiding the problem of inaccurate data caused by sampling too early or too late, and can effectively prevent the leakage of oil samples during subsequent operations, avoid the oil samples from being contaminated by the outside world, and ensure the quality and integrity of the collected oil samples, so that subsequent various detection and analysis based on the oil samples can obtain a reliable data basis. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of an oil layer sampling device for oil production samples proposed by the present invention;

[0022] Figure 2 A front view of an oil layer sampling device for oil production samples proposed by the present invention;

[0023] Figure 3 A cross-sectional view of a protective cover of a petroleum production sample oil layer sampling device proposed by the present invention;

[0024] Figure 4 The present invention provides a kind of oil production sample oil layer sampling equipment Figure 3 The enlarged view of point A in the middle;

[0025] Figure 5 A cross-sectional view of an oil pipe of an oil layer sampling device for oil production samples proposed by the present invention;

[0026] Figure 6 A diagram showing the position of the ejector pin and the sealing door of a petroleum production sample oil layer sampling device proposed by the present invention;

[0027] Figure 7 A cross-sectional view of a rotating tube of an oil layer sampling device for oil production samples proposed by the present invention;

[0028] Figure 8 A cross-sectional view of a sealing disk of a petroleum production sample oil layer sampling device proposed by the present invention;

[0029] Fig. 9 A float position diagram of a petroleum production sample oil layer sampling device proposed by the present invention;

[0030] Fig.10 A three-dimensional diagram of a bearing II of an oil layer sampling device for oil production samples proposed by the present invention;

[0031] Fig.11 A side view of a slide bar of an oil layer sampling device for oil production samples proposed by the present invention.

[0032] In the figure: 1, base; 2, support frame; 3, driving mechanism; 31, motor; 32, bevel gear I; 33, wire roller; 34, straight gear I; 35, cable roller; 36, straight gear II; 37, toothed belt; 38, bevel gear II; 39, cable head; 4, oil extraction device; 41, protective cover; 42, isolation plate; 43, motor I; 44, sealed bearing; 45, rotating tube; 46, sampling component; 461, oil pipe; 462, cylinder pipe; 463, L-type connecting Rod; 464, ejector pin; 465, slide groove; 466, oil inlet groove; 467, sealing door; 47, sealing component; 471, sealing disk; 472, ejector block; 473, connecting column; 474, slide bar; 475, fixing ring; 476, connecting rod; 477, lever; 478, float; 48, bearing I; 49, fan blade; 410, shielding block; 411, spring; 412, sealed bearing II; 413, bearing II; 414, T-type slider. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Reference Figure 1-Figure 11 , a petroleum production sample oil layer sampling equipment, reference Figure 1-Figure 5 As shown, the device includes a base 1, a support frame 2 is symmetrically arranged on the upper surface of the base 1, a driving mechanism 3 is arranged on the upper surface of the base 1, and the driving mechanism 3 includes a wire roller 33 and a cable roller 35. Both ends of the wire roller 33 and the two ends of the cable roller 35 are rotatably connected to the inner side surfaces of the two support frames 2 respectively, and one end of the wire rope of the wire roller 33 is fixedly connected to the oil extraction device 4. The oil extraction device 4 is pulled up and down by the wire rope, which can effectively adapt to the sampling work of oil wells of different depths.

[0035] The oil extraction device 4 includes a protective cover 41, an isolation plate 42 is fixedly connected to the inner wall of the protective cover 41, a sealed bearing 44 is embedded in the center of the isolation plate 42, a motor I43 is fixedly connected to the upper surface of the isolation plate 42, and the output shaft of the motor I43 is fixedly connected to the inner ring of the sealed bearing 44 through a coupling. The setting of the isolation plate 42 prevents external oil from entering the interior of the protective cover 41, thereby affecting the motor I43.

[0036] The lower end of the coupling of the motor I43 is fixedly connected with a rotating tube 45, a sampling component 46 is arranged inside the rotating tube 45, and a sealing component 47 is arranged on the periphery of the rotating tube 45.

[0037] In this embodiment, refer to Figure 3 and Figure 4The inner bottom wall at the bottom end of the protective cover 41 is fixedly connected to a bearing I48, and a fan blade 49 is arranged in a circular array on the inner ring surface of the bearing I48. One end of the fan blade 49 in the circular array is fixedly connected to the outer ring surface of the sealing bearing II412. The fan blade 49 rotated by the rotating tube 45 driven by the motor I43 provides power for the speed at which the entire equipment descends in the oil. The rotation speed of the fan blade 49 can be appropriately adjusted to control the descending speed of the entire equipment. The bottom array of the protective cover 41 is provided with grooves, and the inner walls of the adjacent grooves are not connected. The inner wall of each groove is rotatably connected with a blocking block 410, and the upper inner wall of each groove and the upper end contact surface of the blocking block 410 are provided with a spring groove, and the inner wall of each spring groove is fixedly connected with a spring 411, and the two ends of the spring 411 are respectively fixedly connected to the upper end of the blocking block 410 and the cover body of the protective cover 41. When the oil entering the interior of the protective cover 41 fills its internal space, since the fan blades 49 are still rotating continuously, the oil subjected to the rotational force continues to enter the interior of the protective cover 41, and then squeezes the inner wall of the protective cover 41, and the squeezed blocking block 410 deflects to the outside of the protective cover 41, and the oil entering from the inner ring gap of the sealed bearing II412 is discharged through the deflection gap of the blocking block 410, thereby preventing the rotation drive of the fan blades 49 from losing the effect of driving the adjustment of the descending speed of the equipment.

[0038] Reference Figure 5 , Figure 7 , Fig.10 and Fig.11 As shown, the outer surface of the rotating tube 45 is fixedly sleeved with a bearing II413, the lower end of the rotating tube 45 is fixedly connected with a sealing bearing II412, the outer ring surface of the bearing II413 is circumferentially fixedly connected with a T-shaped slider 414, and the outer ring of the bearing II413 is slidably connected to the slide bar 474 through the T-shaped slider 414, which provides an effective support for the up and down sliding of the sealing component 47 and the sealing of the inside of the protective cover 41.

[0039] Reference Figure 5 and Figure 6 As shown, in order to realize the action of sampling oil layers of different depths by the sampling component 46, the sampling component 46 includes an oil pipe 461, the outer surface of the oil pipe 461 is rotatably connected to the inner wall of the rotating tube 45 through a bearing, the inner wall of the oil pipe 461 is fixedly connected to a cylinder pipe 462, the inner wall of the cylinder pipe 462 is fixedly connected to a cylinder, the piston rod of the cylinder is fixedly connected to an L-shaped connecting rod 463, a slide groove 465 is provided on the inner wall of the oil pipe 461, and a ejector pin 464 is slidably connected to the inner wall of the slide groove 465, one end of the ejector pin 464 is rotatably connected to one end of the L-shaped connecting rod 463, and the other end of the ejector pin 464 is rotatably connected to a sealing door 467, and the inner wall of the oil pipe 461 corresponding to the sealing door 467 is provided with an oil inlet groove 466 matched thereto, and the upper and lower ends of the sealing door 467 are respectively hinged to the inner wall of the oil inlet groove 466.

[0040] Specifically, when the oil pipe 461 reaches the predetermined sampling depth, the cylinder in the cylinder tube 462 is started to open the sealing door 467 and start collecting the oil sample at that depth; after the sampling is completed, the cylinder is controlled to close the sealing door 467 to prevent the oil sample from leaking or being contaminated.

[0041] Reference Figure 8-Figure 11 As shown, in order to realize the action of sealing component 47 to seal the oil inside protective cover 41, sealing component 47 is provided including sealing disk 471, the surface of sealing disk 471 is matched with the inner wall of protective cover 41, the outer side of sealing disk 471 is provided with an annular groove, the inner wall circumferential array of annular groove is provided with top blocks 472, one side of each top block 472 is fixedly connected with connecting column 473, the surface of connecting column 473 is slidably connected with the disk body of sealing disk 471, one end of connecting column 473 is slidably connected with sliding bar 474, the back side of sliding bar 474 is provided with a groove matched with the surface of T-shaped slider 414, the surface of T-shaped slider 414 is slidably connected with the inner wall of the groove The upper end of the slide bar 474 is arranged to be convex, and the disk body of the sealing disk 471 is provided with a limiting groove matched with the surface of the slide bar 474. The surface of the slide bar 474 is slidably connected to the inner wall of the limiting groove. The upper end of the slide bar 474 is fixedly connected with a fixing ring 475. The inner side surface of the fixing ring 475 is slidably connected to the outer surface of the rotating tube 45. The upper end of the fixing ring 475 is symmetrically fixedly connected with a connecting rod 476. The upper end of each connecting rod 476 is rotatably connected with a lever 477 respectively. One end of the lever 477 is fixedly connected with a floating ball 478. The supporting point of the lever 477 is fixedly connected to the lower surface of the isolation plate 42. The material density of the floating ball 478 is lower than the density of petroleum.

[0042] Specifically, when the liquid level rises, the entire sealing component 47 is raised in the protective cover 41 by the oil pressure until it rises to a position where it cannot rise further. At this time, the inner bottom wall of the slot on the back of the slide bar 474 contacts the bottom end of the T-shaped slide block 414, and the sealing effect of the contact sealing component 47 and the inner wall of the protective cover 41 is achieved. The oil enters the interior of the protective cover 41 through the gap between the sealing component 47 and the inner wall of the protective cover 41 until the oil touches the float 478, and the float 478 floats up, and the oil is released through the lever 477 and the connecting rod 476. The sliding bar 474 fixedly connected to the fixing ring 475 slides downward, and the protruding surface of the sliding bar 474 squeezes the connecting column 473. The squeezed connecting column 473 drives the top block 472 to move outward until the outer side surface of the top block 472 fits tightly with the inner wall of the protective cover 41. At this point, the external oil cannot enter the enclosed space formed by the inner wall of the protective cover 41 and the sealing component 47, and the oil inside it increases the weight of the entire oil extraction device 4, further improving the descending speed of the entire oil extraction device 4 in the oil.

[0043] In this embodiment, a sealing layer is applied at the contact point between the sealing door 467 and the oil pipe 461 .

[0044] Specifically, during the sampling process, when the sealing door 467 is in a closed state, even when the equipment is vibrating or the internal pressure changes, the sealing layer can effectively prevent the oil sample from leaking out of these gaps, ensuring that the oil sample taken from the oil pipe 461 is well sealed therein, maintaining the integrity of the oil sample, thereby ensuring the accuracy of subsequent analysis and testing work based on the oil sample.

[0045] In this embodiment, the lower end of the oil pipe 461 is in a frustum shape. Specifically, the above design facilitates further reducing the resistance of the oil to the oil extraction device 4 when the oil extraction device 4 descends in the oil.

[0046] Reference Figure 1-Figure 2 As shown, in the present embodiment, the driving mechanism 3 further comprises a motor 31 fixed on the upper surface of the base 1, the output shaft of the motor 31 is fixedly connected with a bevel gear I32 via a coupling, one end of the cable roller 35 is fixedly connected with a spur gear I34, one end of the wire roller 33 is fixedly connected with a spur gear II36, the spur gear I34 and the spur gear II36 are respectively located on the outside of the support frame 2, a toothed belt 37 is meshed between the spur gear I34 and the spur gear II36, one end of the cable roller 35 is fixedly connected with a bevel gear II38, the surface of the bevel gear II38 is meshed with the surface of the bevel gear I32, the bevel gear II38 is located on the outside of the spur gear I34, and one end of the cable roller 35 is fixedly connected with a cable head 39.

[0047] Specifically, when the wire roller 33 drives the oil extraction device 4 to descend to a specified depth for sampling through a wire rope, the cable roller 35 can simultaneously perform related work such as power transmission and signal transmission to ensure that the oil extraction device 4 can operate normally during the sampling process, thereby achieving good coordination between the various components and improving the working efficiency and accuracy of the entire oil extraction equipment.

[0048] Reference Figure 1-Figure 11 , a method for using a petroleum production sample oil layer sampling device, the operating steps are as follows:

[0049] Step 1: When sampling, the whole equipment is moved to the top of the oil well, the motor 31 rotates, the cable roller 35 and the wire roller 33 rotate synchronously, the wire and the cable are lengthened synchronously, and the oil extraction device 4 at the end of the wire is slowly lowered. When the lower end of the protective cover 41 contacts the oil, the motor I43 starts, and the motor I43 drives the rotating tube 45 to rotate. The rotating tube 45 drives the outer ring of the sealing bearing II412 fixed below to rotate. The outer ring of the sealing bearing II412 drives the fan blades 49 of the circular array on its surface to rotate forward. The forward rotating fan blades 49 push the oil into the protective cover 41. At the same time, the oil exerts an upward thrust on the sealing component 47, and the sealing component 47 moves upward until the slot on the back of the slide bar 474 contacts the bottom end of the T-shaped slide block 414, and the sealing component 47 stops moving, and the sealing component 47 is released from the contact effect with the inner wall of the protective cover 41.

[0050] Step 2, oil continues to enter the interior of the protective cover 41, and the oil level inside the protective cover 41 continues to rise. When the surface of the oil contacts the surface of the float 478, the float 478 rises under the buoyancy of the oil, and the float 478 drives the connecting rod 476 to move downward through the lever 477. The lower end of the connecting rod 476 presses the fixing ring 475 downward, and the fixing ring 475 drives the slide bar 474 fixed at its lower end to slide downward, and the outer side of the slide bar 474 presses the connecting column 473, and the top block 472 moves toward the inner side of the protective cover 41 until the float 478 can no longer rise. At this time, the surface of the top block 472 is tightly fitted with the inner wall of the protective cover 41, and the top block 472 and the sealing disk 471 cooperate with the protective cover 41 to form a closed space. The oil entering the sealed space cooperates with the forward rotating fan blades 49 to further control the descending speed of the oil extraction device 4 in the oil.

[0051] Step 3: The fan blade 49 continues to rotate. The oil that enters the protective cover 41 again cannot enter the enclosed space due to the action of the sealing disk 471 and the top block 472. The reaction force generated by the continuous rotation of the fan blade 49 acts on the blocking block 410 through the oil, which pushes the blocking block 410 rotatably connected to the protective cover 41 outward. The oil that enters the protective cover 41 through the fan blade 49 is discharged through the gap between the outward-biased blocking block 410 and the protective cover 41, thereby preventing the oil from being unable to be discharged and causing resistance to the descent of the oil extraction device 4.

[0052] Step 4. When the oil extraction device 4 reaches the designated oil layer, the motor 143 stops rotating, and the piston rod of the cylinder in the cylinder tube 462 pulls the sealing door 467 rotatably connected to the ejector pin 464 through the L-shaped connecting rod 463 to open toward the inner side of the oil pipe 461. The oil at the designated depth penetrates through the bearing gap between the oil pipe 461 and the rotating tube 45, and enters the inside of the oil pipe 461 through the oil inlet groove 466 until the oil pipe 461 is filled with the oil of the target oil layer. The cylinder in the cylinder tube 462 closes the sealing door 467 through the ejector pin 464, and the motor 31 drives the wire roller 33 and the cable roller 35 to rotate in the opposite direction, and the wire takes out the oil extraction device 4 with one end fixed thereon.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A petroleum extraction sample oil layer sampling device, comprising a base (1), wherein a support frame (2) is symmetrically arranged on the upper surface of the base (1), characterized in that: A driving mechanism (3) is provided on the upper surface of the base (1), the driving mechanism (3) comprising a wire roller (33) and a cable roller (35), both ends of the wire roller (33) and both ends of the cable roller (35) are rotatably connected to the inner side surfaces of the two support frames (2), one end of the wire rope of the wire roller (33) is fixedly connected to an oil extraction device (4), the oil extraction device (4) comprises a protective cover (41), and an isolation plate (42) is fixedly connected to the inner wall of the protective cover (41). ), a sealed bearing (44) is embedded in the center of the isolation plate (42), a motor I (43) is fixedly connected to the upper surface of the isolation plate (42), an output shaft of the motor I (43) is fixedly connected to the inner ring of the sealed bearing (44) via a coupling, a rotating tube (45) is fixedly connected to the lower end of the coupling of the motor I (43), a sampling component (46) is provided inside the rotating tube (45), and a sealing component (47) is provided on the periphery of the rotating tube (45); The inner bottom wall of the bottom end of the protective cover (41) is fixedly connected to a bearing I (48), the inner ring surface of the bearing I (48) is provided with fan blades (49) in a circumferential array, the outer surface of the rotating tube (45) is fixedly sleeved with a bearing II (413), and the outer ring surface of the bearing II (413) is fixedly connected to a T-shaped slider (414); The sampling component (46) is used to sample oil layers at different depths; The sealing component (47) is used to seal the oil inside the protective cover (41); The sealing component (47) comprises a sealing disk (471), the surface of the sealing disk (471) is matched with the inner wall of the protective cover (41), the outer side surface of the sealing disk (471) is provided with an annular groove, and the inner wall of the annular groove is provided with a top block (472) in a circumferential array, one side of each top block (472) is fixedly connected to a connecting column (473), the surface of the connecting column (473) is slidably connected to the disk body of the sealing disk (471), and one end of the connecting column (473) is slidably connected to a sliding bar (474); A slot matching the surface of the T-shaped slider (414) is provided on the back of the slide bar (474), and the surface of the T-shaped slider (414) is slidably connected to the inner wall of the slot.

2. The oil layer sampling device for oil production samples according to claim 1 is characterized by: The bottom end array of the protective cover (41) is provided with grooves, the inner walls of the two adjacent grooves are not connected, the inner wall of each groove is rotatably connected to a blocking block (410), the upper inner wall of each groove and the contact surface with the upper end of the blocking block (410) are provided with a spring groove, the inner wall of each spring groove is fixedly connected to a spring (411), the two ends of the spring (411) are respectively fixedly connected to the upper end of the blocking block (410) and the cover body of the protective cover (41), the lower end of the rotating tube (45) is fixedly connected to a sealing bearing II (412), and one end of the fan blades (49) in a circular array is respectively fixedly connected to the outer ring surface of the sealing bearing II (412).

3. The oil layer sampling device for oil production samples according to claim 2 is characterized in that: The sampling component (46) comprises an oil pipe (461), the outer surface of the oil pipe (461) is rotatably connected to the inner wall of the rotating tube (45) via a bearing, the inner wall of the oil pipe (461) is fixedly connected to a cylinder pipe (462), the inner wall of the cylinder pipe (462) is fixedly connected to a cylinder, the piston rod of the cylinder is fixedly connected to an L-shaped connecting rod (463), and a slide groove (465) is provided on the inner wall of the oil pipe (461), and the slide groove (465) is fixedly connected to the inner wall of the rotating tube (45). 5) is slidably connected to the inner wall of the oil pipe (461), one end of the ejector pin (464) is rotatably connected to one end of the L-shaped connecting rod (463), and the other end of the ejector pin (464) is rotatably connected to a sealing door (467), and the inner wall of the oil pipe (461) corresponding to the sealing door (467) is provided with an oil inlet groove (466) adapted thereto, and the upper end and the lower end of the sealing door (467) are respectively hinged to the inner wall of the oil inlet groove (466).

4. The oil layer sampling device for oil production samples according to claim 3 is characterized by: A sealing layer is applied at the contact point between the sealing door (467) and the oil pipe (461).

5. The oil layer sampling device for oil production samples according to claim 4 is characterized by: The lower end of the oil pipe (461) is in a frustum shape.

6. The oil layer sampling device for oil production samples according to claim 5, characterized in that: The upper end of the slide bar (474) is arranged in a convex shape, the disk body of the sealing disk (471) is provided with a limiting groove adapted to the surface of the slide bar (474), the surface of the slide bar (474) is slidably connected to the inner wall of the limiting groove, the upper end of the slide bar (474) is fixedly connected to a fixing ring (475), and the inner side surface of the fixing ring (475) is slidably connected to the outer surface of the rotating tube (45).

7. The oil layer sampling device for oil production samples according to claim 6, characterized in that: The upper end of the fixing ring (475) is symmetrically fixedly connected to a connecting rod (476), the upper end of each connecting rod (476) is rotatably connected to a lever (477), one end of the lever (477) is fixedly connected to a floating ball (478), and the supporting point of the lever (477) is fixedly connected to the lower surface of the isolation plate (42).

8. The oil layer sampling device for oil production samples according to claim 7, characterized in that: The driving mechanism (3) further comprises a motor (31) fixed to the upper surface of the base (1), the output shaft of the motor (31) being fixedly connected to a bevel gear I (32) via a coupling, one end of the cable roller (35) being fixedly connected to a spur gear I (34), one end of the wire roller (33) being fixedly connected to a spur gear II (36), the spur gear I (34) and the spur gear II (36) being respectively located on the outside of the support frame (2), a toothed belt (37) being meshed between the spur gear I (34) and the spur gear II (36), one end of the cable roller (35) being fixedly connected to a bevel gear II (38), the surface of the bevel gear II (38) being meshed with the surface of the bevel gear I (32), the bevel gear II (38) being located on the outside of the spur gear I (34), and one end of the cable roller (35) being fixedly connected to a cable head (39).

9. The oil layer sampling device for oil production samples according to claim 8, characterized in that: The material density of the float (478) is smaller than the density of petroleum.

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