Sampling device and method for testing mobility of shale oil

Abstract

The invention relates to the technical field of shale oil sampling, in particular to a sampling device and method for shale oil mobility test.The sampling device comprises a sampling shell, a sampling opening and a cleaning assembly, and the sampling shell is provided with a sampling groove; the cleaning assembly comprises a sampling moving bin, a driving motor, a linkage transfer unit, two pressing activation mechanisms and two high-pressure backwashing nozzles, and the driving motor is started to drive the linkage transfer unit to operate; the linkage transfer unit is used for separating the sampling port from the sampling groove and transferring the sampling port into the sampling shell; after the sampling port enters the sampling shell, the pressing activation mechanism is touched, and then the high-pressure backwashing spray head is started to spray high-pressure water to clean pollutants at the sampling port; in this way, repeated pulling-out and underground operation is not needed, one-time rapid automatic cleaning can be completed after sampling every time, the sampling quality every time is guaranteed, and the overall sampling efficiency of the mobility test is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shale oil sampling, in particular to a sampling device and method for shale oil mobility testing. BACKGROUND

[0002] At present, in the field of shale oil exploitation and mobility testing, the downhole sampling device is the core equipment for obtaining the original fluid sample of the reservoir. It is mainly used to carry the target reservoir depth through the drill string, establish communication between the sampling port and the reservoir fluid, and realize the collection of shale oil samples. However, when the shale oil sampling port moves downhole, it is usually contaminated or even blocked by drilling fluid and well wall debris, so it is necessary to regularly disassemble, clean or replace the used sampling port.

[0003] In the foregoing prior art, when the sampling port is blocked and needs to be manually disassembled, cleaned or replaced, the entire sampling device needs to be removed from the downhole to the ground before the specific operation of disassembly, cleaning or replacement can be carried out. Not only is the operation process complicated and the process redundant, but also a large amount of downhole operation time is occupied. If the downhole reservoir environment is complex and the sampling port is prone to repeated blockage, the sampling device needs to be frequently pulled out of the downhole to the ground for cleaning operation. The repeated tripping operation not only further increases the operation time, but also seriously reduces the overall sampling efficiency of shale oil mobility testing. SUMMARY

[0004] The present application aims to provide a sampling device and method for shale oil mobility testing, which solves the problem that in the prior art, when the sampling port is blocked and needs to be manually disassembled, cleaned or replaced, the entire sampling device needs to be removed from the downhole to the ground before the specific operation of disassembly, cleaning or replacement can be carried out. Not only is the operation process complicated and the process redundant, but also a large amount of downhole operation time is occupied. If the downhole reservoir environment is complex and the sampling port is prone to repeated blockage, the sampling device needs to be frequently pulled out of the downhole to the ground for cleaning operation. The repeated tripping operation not only further increases the operation time, but also seriously reduces the overall sampling efficiency of shale oil mobility testing.

[0005] To achieve the above-mentioned purpose, the present application provides a sampling device for shale oil mobility testing, comprising a sampling shell, a sampling port and a cleaning assembly. The sampling shell has a sampling groove, and the sampling port is arranged inside the sampling groove. The cleaning assembly comprises a sampling moving bin, a driving motor, a linkage transfer unit, two downward pressing activation mechanisms and two high-pressure backwashing nozzles. The sampling moving bin is arranged inside the sampling shell, the sampling port is in communication with the sampling moving bin, the linkage transfer unit is arranged on the sampling moving bin, the driving motor and the downward pressing activation mechanism are both arranged on the linkage transfer unit, and the two high-pressure backwashing nozzles are arranged above the sampling moving bin in sequence.

[0006] The cleaning assembly further comprises a filter plate, a collection channel, a sampling pump, a flexible hose and a butt joint pipe. The filter plate is arranged inside the sampling moving bin. The collection channel is arranged below the filter plate. The sampling pump is arranged above the sampling moving bin. The two ends of the flexible hose are respectively communicated with the water inlet end of the sampling pump and the sampling moving bin. The butt joint pipe is communicated with the water outlet end of the sampling pump.

[0007] The cleaning assembly further comprises a sealing mechanism arranged inside the sampling shell. The sealing mechanism comprises a sealing block and two sealing push rods. The sampling shell has a sealing groove. The two sealing push rods are arranged inside the sealing groove. The output end of the sealing push rod is fixedly connected with the sealing block. The sealing block is matched with the sampling groove.

[0008] The linkage transfer unit comprises a rack, a gear, a support frame, an upward moving rod, an upward moving locking mechanism and a horizontal moving mechanism. The rack is arranged on one side of the sampling moving bin. The horizontal moving mechanism is arranged above the rack. The support frame is arranged at the output end of the horizontal moving mechanism. The driving motor is arranged inside the support frame. The output end of the driving motor is fixedly connected with the gear. The gear is meshed with the rack. The upward moving rod is arranged on one side of the rack. The upward moving locking mechanism is arranged on one side of the support frame. The upward moving rod is matched with the upward moving locking mechanism.

[0009] The upward moving locking mechanism comprises a support plate, a locking block, a metal block, an electromagnet, an extension rod and a spring. The upward moving rod has a plurality of locking grooves. The support plate is arranged on one side of the support frame. One end of the upward moving rod penetrates through the support plate. The locking block is matched with the locking groove. The metal block is fixedly connected with one end of the locking block. The electromagnet is arranged above the support plate and located on one side of the metal block. The two ends of the extension rod are respectively fixedly connected with the electromagnet and the locking block. The two ends of the spring are respectively movably connected with the electromagnet and the locking block. The spring is sleeved outside the extension rod.

[0010] The horizontal moving mechanism comprises a horizontal moving driving part, a horizontal moving plate, an upward moving trigger switch and a horizontal moving trigger switch. The horizontal moving driving part is arranged above the rack. The horizontal moving plate is arranged at the output end of the horizontal moving driving part. The upward moving trigger switch is arranged on one side of the horizontal moving plate. The support frame is arranged at one end of the horizontal moving plate. The horizontal moving trigger switch is arranged on the inner side wall of the sampling shell and located on the same horizontal line of the support plate.

[0011] The pressing activation mechanism includes a rotating shaft, a pressing block, a connecting rod, an upper block, and a pressing trigger switch. The sampling housing has a groove, the rotating shaft is rotatably connected to the groove, the connecting rod is sleeved on the outer wall of the rotating shaft, the pressing block and the upper block are respectively disposed at both ends of the connecting rod, and the pressing trigger switch is disposed on the inner wall of the sampling housing and located above the upper block.

[0012] The cleaning assembly further includes a water tank, a cover plate, a cover plate rotating component, and two backwashing mechanisms. The water tank is disposed on the inner wall of the sampling housing and located above the transverse drive component. The cover plate rotating component is disposed on one side of the sampling moving chamber. The cover plate is rotatably connected to the sampling moving chamber. The output end of the cover plate rotating component is fixedly connected to the cover plate. The two backwashing mechanisms are sequentially disposed on the water tank. The backwashing mechanism includes a high-pressure pump, a water supply telescopic hose, a high-pressure backwash nozzle, and a lifting component. The high-pressure pump is located on the inner bottom wall of the water tank. The two ends of the water supply telescopic hose are respectively connected to the high-pressure pump and the high-pressure backwash nozzle. The lifting component is located below the water tank, and the output end of the lifting component is fixedly connected to one side of the high-pressure backwash nozzle.

[0013] The cleaning assembly further includes a wastewater collection mechanism, which includes a docking valve, a collection box, and a discharge port. The collection box is located at the bottom inside the sampling housing, the docking valve is located on the collection box, and the discharge port is located on one side of the collection box. The docking valve and the sampling port are mutually compatible.

[0014] The present invention also provides a sampling method for testing the mobility of shale oil, which uses the above-described sampling device for testing the mobility of shale oil and includes the following steps: The sampling device is installed in the shale oil well. The sampling port is located inside the sampling tank, and sample oil is extracted from the well through the sampling port. After extraction is completed, the drive motor is started to drive the linkage transfer unit to operate; The linkage transfer unit causes the sampling port to detach from the sampling slot and transfer to the inside of the sampling housing; After the sampling port enters the sampling housing, it touches the downward activation mechanism, which in turn activates the high-pressure backwash nozzle to spray high-pressure water to clean the contaminants in the sampling port.

[0015] This invention discloses a sampling device and method for shale oil mobility testing. The sampling housing is installed in the sampling equipment downhole of a shale oil well. The sampling port is located inside the sampling tank, through which sample oil is extracted from the well. After extraction, the drive motor is activated to operate the linkage transfer unit. The linkage transfer unit causes the sampling port to detach from the sampling tank and transfer to the inside of the sampling housing. After the sampling port enters the sampling housing, it contacts the downward activation mechanism, thereby activating the high-pressure backflushing nozzle to spray high-pressure water to clean contaminants from the sampling port. Thus, after one sampling operation at the sampling port, the device performs rapid downhole transfer and cleaning of the sampling port, significantly improving operational efficiency. It eliminates the need for repeated tripping and removal from the well, allowing for rapid automatic cleaning after each sampling. This not only ensures the quality of each sample but also improves the overall sampling efficiency of mobility testing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the sampling device for testing the mobility of shale oil according to the present invention.

[0018] Figure 2 This is a cross-sectional view of the sampling device for testing the mobility of shale oil according to the present invention.

[0019] Figure 3 This is the invention Figure 2 A sectional view along line AA.

[0020] Figure 4 This is the invention Figure 2 Enlarged view of the local structure at point B.

[0021] Figure 5 This is a schematic diagram of the linkage transfer unit of the present invention.

[0022] Figure 6 This is a schematic diagram of the drive motor of the present invention.

[0023] Figure 7 This is a flowchart of the sampling method for testing the mobility of shale oil according to the present invention.

[0024] 1-Sampling housing, 2-Sampling port, 3-Sampling slot, 4-Sampling moving chamber, 5-Drive motor, 6-High-pressure backwash nozzle, 7-Filter plate, 8-Collection channel, 9-Sampling pump, 10-Telescopic hose, 11-Connecting pipe, 12-Sealing block, 13-Sealing push rod, 14-Sealing groove, 15-Rack, 16-Gear, 17-Support frame, 18-Upward moving rod, 19-Support plate, 20-Locking block, 21-Metal block, 22-Electromagnet, 23-Telescopic rod 24-Spring, 25-Locking groove, 26-Horizontal movement drive component, 27-Horizontal movement plate, 28-Upward movement trigger switch, 29-Horizontal movement trigger switch, 30-Rotating shaft, 31-Downward pressure block, 32-Connecting rod, 33-Upward block, 34-Downward pressure trigger switch, 35-Groove, 36-Water tank, 37-Cover plate, 38-Cover plate rotating component, 39-High pressure pump, 40-Water supply telescopic pipe, 41-Drain outlet, 42-Lifting component, 43-Connecting valve, 44-Collection box. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0026] Please see Figures 1 to 6 The present invention provides a sampling device for testing the mobility of shale oil, including a sampling shell 1, a sampling port 2 and a cleaning component. The sampling shell 1 has a sampling groove 3 and the sampling port 2 is disposed inside the sampling groove 3. The cleaning assembly includes a sampling moving chamber 4, a drive motor 5, a linkage transfer unit, two pressure activation mechanisms, and two high-pressure backwash nozzles 6. The sampling moving chamber 4 is located inside the sampling housing 1, and the sampling port 2 is connected to the sampling moving chamber 4. The linkage transfer unit is located on the sampling moving chamber 4, and the drive motor 5 and the pressure activation mechanisms are both located on the linkage transfer unit. The two high-pressure backwash nozzles 6 are sequentially located above the sampling moving chamber 4.

[0027] In this embodiment, the sampling housing 1 is installed in the sampling equipment downhole of the shale oil well; the sampling port 2 is located inside the sampling tank 3, and sample oil is extracted from downhole through the sampling port 2; after extraction, the drive motor 5 is started to drive the linkage transfer unit; the linkage transfer unit causes the sampling port 2 to detach from the sampling tank 3 and transfer to the sampling housing 1; after the sampling port 2 enters the sampling housing 1, it touches the downward activation mechanism, thereby activating the high-pressure backflushing nozzle 6 to spray high-pressure water to clean the contaminants from the sampling port 2; thus, after the sampling port 2 completes one sampling, the device quickly transfers and cleans the sampling port 2 downhole, significantly improving the operating efficiency. It eliminates the need for repeated tripping and removal from the well, thus enabling a rapid automatic cleaning after each sampling, ensuring the quality of each sample and improving the overall sampling efficiency of mobility testing.

[0028] Furthermore, the cleaning assembly also includes a filter plate 7, a collection channel 8, a sampling pump 9, a telescopic hose 10, and a connecting pipe 11. The filter plate 7 is disposed inside the sampling moving chamber 4, the collection channel 8 is disposed below the filter plate 7, the sampling pump 9 is disposed above the sampling moving chamber 4, the two ends of the telescopic hose 10 are respectively connected to the water inlet of the sampling pump 9 and the sampling moving chamber 4, and the connecting pipe 11 is connected to the water outlet of the sampling pump 9.

[0029] In this embodiment, the sample oil collected by the sampling port 2 can be transported to the filter plate 7 of the sampling mobile chamber 4 through the collection channel 8. The filter plate 7 filters foreign matter in the sample oil. Finally, the sampling pump 9 is started, and the sample oil is drawn away through the telescopic hose 10. The connecting pipe 11 is connected to the external equipment, and then output to the external equipment through the connecting pipe 11 to realize the shale oil mobility test.

[0030] Furthermore, the cleaning assembly also includes a sealing mechanism disposed inside the sampling housing 1; The sealing mechanism includes a sealing block 12 and two sealing push rods 13. The sampling housing 1 has a sealing groove 14. The two sealing push rods 13 are disposed inside the sealing groove 14. The output end of the sealing push rod 13 is fixedly connected to the sealing block 12. The sealing block 12 and the sampling groove 3 are mutually adapted.

[0031] In this embodiment, when the sampling port 2 is moved out of the sampling slot 3, the sealing push rod 13 is activated, which drives the sealing block 12 to move into the sampling slot 3, thereby sealing the sampling slot 3 and preventing foreign objects from entering the sampling housing 1 after the sampling port 2 is moved out.

[0032] Furthermore, the linkage transfer unit includes a rack 15, a gear 16, a support frame 17, an upper moving rod 18, an upper moving locking mechanism, and a lateral moving mechanism. The rack 15 is disposed on one side of the sampling moving chamber 4, the lateral moving mechanism is disposed above the rack 15, the support frame 17 is disposed at the output end of the lateral moving mechanism, the drive motor 5 is disposed inside the support frame 17, the output end of the drive motor 5 is fixedly connected to the gear 16, the gear 16 meshes with the rack 15, the upper moving rod 18 is disposed on one side of the rack 15, the upper moving locking mechanism is disposed on one side of the support frame 17, and the upper moving rod 18 is adapted to the upper moving locking mechanism.

[0033] In this embodiment, after the drive motor 5 is started, the drive motor 5 drives the gear 16 to rotate. Through meshing, the gear 15 moves, and the gear 15 moves the sampling moving chamber 4 upward, thereby causing the sampling port 2 to disengage from the sampling slot 3. At the same time, the movement of the gear 15 also drives the upper moving rod 18 to move upward. When the movement reaches the preset position, the upper moving locking mechanism locks the upper moving rod 18, thereby locking the gear 15 and the sampling moving chamber 4. Then, the lateral moving mechanism is started, driving the sampling moving chamber 4 to move laterally and enter the interior of the sampling outer shell 1, that is, above the collection box 44.

[0034] Furthermore, the upward locking mechanism includes a support plate 19, a locking block 20, a metal block 21, an electromagnet 22, a telescopic rod 23, and a spring 24. The upward rod 18 has multiple locking slots 25. The support plate 19 is disposed on one side of the support frame 17. One end of the upward rod 18 passes through the support plate 19. The locking block 20 is adapted to the locking slots 25. The metal block 21 is fixedly connected to one end of the locking block 20. The electromagnet 22 is disposed above the support plate 19 and located on one side of the metal block 21. Both ends of the telescopic rod 23 are fixedly connected to the electromagnet 22 and the locking block 20, respectively. Both ends of the spring 24 are movably connected to the electromagnet 22 and the locking block 20, respectively. The spring 24 is sleeved on the outside of the telescopic rod 23.

[0035] In this embodiment, the support plate 19 supports the electromagnet 22. When the upward moving rod 18 moves upward, it pushes the inclined surface of the locking block 20, causing the locking block 20 to retract. When the upward moving rod 18 stops at a preset position, the spring 24 drives the locking block 20 to rebound into the locking groove 25 to achieve a limit. At the same time, the telescopic rod 23 extends to maintain stability. When the sampling moving chamber 4 and the upward moving rod 18 need to move downward, the electromagnet 22 is energized to attract the metal block 21. The metal block 21 drives the locking block 20 to disengage from the locking groove 25, and then the upward moving rod 18 is released from its limitation and moves downward.

[0036] Furthermore, the transverse movement mechanism includes a transverse movement drive component 26, a transverse movement plate 27, an upward movement trigger switch 28, and a transverse movement trigger switch 29. The transverse movement drive component 26 is disposed above the rack 15, the transverse movement plate 27 is disposed at the output end of the transverse movement drive component 26, the upward movement trigger switch 28 is disposed on one side of the transverse movement plate 27, the support frame 17 is disposed at one end of the transverse movement plate 27, and the transverse movement trigger switch 29 is disposed on the inner side wall of the sampling housing 1 and is located on the same horizontal line as the support plate 19.

[0037] In this embodiment, when the rack 15 moves upward, it eventually contacts the upward trigger switch 28. After contact, it indicates that the sampling moving chamber 4 has reached the preset position, and the sampling port 2 has also disengaged from the sampling groove 3. At this time, the locking block 20 limits the upward moving rod 18. Then, the horizontal moving drive component 26 is activated to drive the horizontal moving plate 27 to move to the right. The horizontal moving plate 27 drives the support frame 17, the support plate 19, and the sampling moving chamber 4 below to move to the right above the collection box 44. Then, the support plate 19 touches the horizontal moving trigger switch 29 on the right side, indicating that it has moved to the preset position. At this time, the electromagnet 22 is energized, causing the locking block 20 to disengage from the locking groove 25. The upward moving rod 18 and the sampling moving chamber 4 move downward for subsequent backwashing operations. In addition, the horizontal moving drive component 26 is an electric slide rail, and the upward trigger switch 28 and the horizontal moving trigger switch 29 are pressure-sensitive trigger switches.

[0038] Furthermore, the pressure activation mechanism includes a rotating shaft 30, a pressure block 31, a connecting rod 32, an upper top block 33, and a pressure trigger switch 34. The sampling housing 1 has a groove 35, the rotating shaft 30 is rotatably connected to the groove 35, the connecting rod 32 is sleeved on the outer wall of the rotating shaft 30, the pressure block 31 and the upper top block 33 are respectively disposed at both ends of the connecting rod 32, and the pressure trigger switch 34 is disposed on the inner wall of the sampling housing 1 and located above the upper top block 33.

[0039] In this embodiment, when the sampling moving chamber 4 moves downward, the pressing block 31 is pressed down, causing one end of the connecting rod 32 to tilt, making the rotating shaft 30 rotate. Then, the upper push block 33 on the other end of the connecting rod 32 is pushed out. The upper push block 33 contacts the pressing trigger switch 34, indicating that the sampling moving chamber 4 has reached the preset position. At this time, the moving rod 18 is locked again and keeps its position still, so the backwashing operation can begin. The pressing trigger switch 34 is a pressure-sensitive trigger switch. The sampling housing 1 is equipped with a controller and a network module. Thus, all the devices in this device and the trigger switch are connected to the controller. The network module is connected to the controller and is connected to the outside of the well via a line. Thus, the downhole device can be remotely and actively controlled, or the cleaning operation can be automated after the controller receives the trigger switch signal.

[0040] Furthermore, the cleaning assembly also includes a water tank 36, a cover plate 37, a cover plate rotating component 38, and two backwashing mechanisms. The water tank 36 is disposed on the inner wall of the sampling housing 1 and located above the transverse drive component 26. The cover plate rotating component 38 is disposed on one side of the sampling moving chamber 4. The cover plate 37 is rotatably connected to the sampling moving chamber 4. The output end of the cover plate rotating component 38 is fixedly connected to the cover plate 37. The two backwashing mechanisms are sequentially disposed on the water tank 36. The backwashing mechanism includes a high-pressure pump 39, a water supply telescopic hose 40, a high-pressure backwash nozzle 6, and a lifting component 42. The high-pressure pump 39 is located on the inner bottom wall of the water tank 36. The two ends of the water supply telescopic hose 10 are respectively connected to the high-pressure pump 39 and the high-pressure backwash nozzle 6. The lifting component 42 is located below the water tank 36, and the output end of the lifting component 42 is fixedly connected to one side of the high-pressure backwash nozzle 6.

[0041] In this embodiment, the water tank 36 stores backwash water. The cover plate rotating component 38 is a self-locking motor. After starting, it drives the cover plate 37 to rotate, opening the sampling moving chamber 4. Then, the backwashing mechanism backwashes the filter plate 7, the collection channel 8, and the sampling port 2 inside the sampling moving chamber 4. During backwashing: the high-pressure pump 39 starts, drawing water into the water delivery telescopic pipe 40, and then spraying it out from the high-pressure backwash nozzle 6. In addition, the lifting component 42 is a self-locking cylinder. After starting, it can drive the high-pressure backwash nozzle 6 closer to the sampling moving chamber 4, improving the backwashing accuracy and avoiding water splashing.

[0042] Furthermore, the cleaning assembly also includes a wastewater collection mechanism, which includes a docking valve 43, a collection box 44, and a drain outlet 41. The collection box 44 is located at the bottom inside the sampling housing 1, the docking valve 43 is located on the collection box 44, and the drain outlet 41 is located on one side of the collection box 44. The docking valve 43 is compatible with the sampling port 2.

[0043] In this embodiment, when the sampling mobile chamber 4 reaches the preset position and moves down, the sampling port 2 connects with the docking valve 43. Then, during the backwashing operation, the backwashing wastewater enters the collection box 44 from the docking valve 43 for storage. After all sampling is completed, the device is moved out of the well and discharged through the sewage outlet 41 for unified treatment.

[0044] When using the shale oil mobility testing sampling device of this embodiment, the sampling housing 1 is installed in the sampling equipment downhole of the shale oil well; the sampling port 2 is located inside the sampling tank 3, and sample oil is extracted from downhole through the sampling port 2; after extraction, the drive motor 5 is started to drive the linkage transfer unit to run; the linkage transfer unit causes the sampling port 2 to detach from the sampling tank 3 and transfer to the sampling housing 1; after the sampling port 2 enters the sampling housing 1, it touches the downward activation mechanism, thereby activating the high-pressure backwash nozzle 6 to spray high-pressure water to clean the contaminants in the sampling port 2; With the above-mentioned structural configuration, after sampling is completed at sampling port 2, the device can quickly transfer and clean the sampling port 2 downhole, which significantly improves the work efficiency. There is no need to repeatedly pull the drill string out of the well. Therefore, a quick and automatic cleaning can be completed after each sampling, which not only ensures the quality of each sampling, but also improves the overall sampling efficiency of mobility testing.

[0045] Please see Figure 7 The present invention also provides a sampling method for testing the mobility of shale oil, comprising the following steps: S1: The sampling device 1 is installed in the shale oil well; S2: The sampling port 2 is located inside the sampling tank 3, and sample oil is extracted from the well through the sampling port 2; S3: After extraction is completed, start the drive motor 5 to drive the linkage transfer unit to run; S4: The linkage transfer unit causes the sampling port 2 to detach from the sampling slot 3 and transfer to the inside of the sampling housing 1; S5: After the sampling port 2 enters the sampling housing 1, it touches the pressing activation mechanism, thereby activating the high-pressure backwash nozzle 6 to spray high-pressure water to clean the contaminants in the sampling port 2.

[0046] The sampling housing 1 is installed in the sampling equipment at the bottom of the shale oil well; the sampling port 2 is located inside the sampling tank 3, and sample oil is extracted from the well through the sampling port 2; after extraction, the drive motor 5 is started to drive the linkage transfer unit; the linkage transfer unit causes the sampling port 2 to detach from the sampling tank 3 and transfer to the inside of the sampling housing 1; after the sampling port 2 enters the inside of the sampling housing 1, it touches the downward activation mechanism, thereby activating the high-pressure backwash nozzle 6 to spray high-pressure water to clean the contaminants from the sampling port 2.

[0047] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A sampling device for testing the mobility of shale oil, comprising a sampling shell and a sampling port, wherein the sampling shell has a sampling groove, and the sampling port is disposed inside the sampling groove, characterized in that, It also includes cleaning components; The cleaning assembly includes a sampling moving chamber, a drive motor, a linkage transfer unit, two downward activation mechanisms, and two high-pressure backwash nozzles. The sampling moving chamber is located inside the sampling housing, and the sampling port is connected to the sampling moving chamber. The linkage transfer unit is located on the sampling moving chamber. The drive motor and the downward activation mechanisms are both located on the linkage transfer unit. The two high-pressure backwash nozzles are sequentially located above the sampling moving chamber.

2. The sampling device for shale oil mobility testing as described in claim 1, characterized in that, The cleaning assembly also includes a filter plate, a collection channel, a sampling pump, a telescopic hose, and a connecting pipe. The filter plate is disposed inside the sampling moving chamber, the collection channel is disposed below the filter plate, the sampling pump is disposed above the sampling moving chamber, the two ends of the telescopic hose are respectively connected to the water inlet of the sampling pump and the sampling moving chamber, and the connecting pipe is connected to the water outlet of the sampling pump.

3. The sampling device for shale oil mobility testing as described in claim 2, characterized in that, The cleaning assembly further includes a sealing mechanism disposed inside the sampling housing; The sealing mechanism includes a sealing block and two sealing push rods. The sampling housing has a sealing groove, and the two sealing push rods are disposed inside the sealing groove. The output end of the sealing push rod is fixedly connected to the sealing block, and the sealing block and the sampling groove are mutually adapted.

4. The sampling device for shale oil mobility testing as described in claim 3, characterized in that, The linkage transfer unit includes a rack, a gear, a support frame, an upper moving rod, an upper moving locking mechanism, and a lateral moving mechanism. The rack is disposed on one side of the sampling moving chamber, the lateral moving mechanism is disposed above the rack, and the support frame is disposed at the output of the lateral moving mechanism. The drive motor is located inside the support frame, and its output end is fixedly connected to the gear. The gear meshes with the rack. The upper moving rod is located on one side of the rack, and the upper moving locking mechanism is located on one side of the support frame. The upper moving rod is adapted to the upper moving locking mechanism.

5. The sampling device for shale oil mobility testing as described in claim 4, characterized in that, The upward locking mechanism includes a support plate, a locking block, a metal block, an electromagnet, a telescopic rod, and a spring. The upward rod has multiple locking slots. The support plate is disposed on one side of the support frame. One end of the upward rod passes through the support plate. The locking block is adapted to the locking slots. The metal block is fixedly connected to one end of the locking block. The electromagnet is disposed above the support plate and located on one side of the metal block. Both ends of the telescopic rod are fixedly connected to the electromagnet and the locking block, respectively. Both ends of the spring are movably connected to the electromagnet and the locking block, respectively. The spring is sleeved on the outside of the telescopic rod.

6. The sampling device for shale oil mobility testing as described in claim 5, characterized in that, The lateral movement mechanism includes a lateral movement drive component, a lateral movement plate, an upward movement trigger switch, and a lateral movement trigger switch. The lateral movement drive component is disposed above the rack, the lateral movement plate is disposed at the output end of the lateral movement drive component, the upward movement trigger switch is disposed on one side of the lateral movement plate, the support frame is disposed at one end of the lateral movement plate, and the lateral movement trigger switch is disposed on the inner side wall of the sampling housing and is located on the same horizontal line as the support plate.

7. The sampling device for shale oil mobility testing as described in claim 6, characterized in that, The pressure activation mechanism includes a rotating shaft, a pressure block, a connecting rod, an upper block, and a pressure trigger switch. The sampling housing has a groove, the rotating shaft is rotatably connected to the groove, the connecting rod is sleeved on the outer wall of the rotating shaft, the pressure block and the upper block are respectively disposed at both ends of the connecting rod, and the pressure trigger switch is disposed on the inner wall of the sampling housing and located above the upper block.

8. The sampling device for shale oil mobility testing as described in claim 7, characterized in that... It lies in, The cleaning assembly also includes a water tank, a cover plate, a cover plate rotating component, and two backwashing mechanisms. The water tank is disposed on the inner wall of the sampling housing and located above the transverse drive component. The cover plate rotating component is disposed on one side of the sampling moving chamber. The cover plate is rotatably connected to the sampling moving chamber. The output end of the cover plate rotating component is fixedly connected to the cover plate. The two backwashing mechanisms are sequentially disposed on the water tank. The backwashing mechanism includes a high-pressure pump, a water supply telescopic hose, a high-pressure backwash nozzle, and a lifting component. The high-pressure pump is located on the inner bottom wall of the water tank. The two ends of the water supply telescopic hose are respectively connected to the high-pressure pump and the high-pressure backwash nozzle. The lifting component is located below the water tank, and the output end of the lifting component is fixedly connected to one side of the high-pressure backwash nozzle.

9. The sampling device for shale oil mobility testing as described in claim 8, characterized in that, The cleaning assembly also includes a wastewater collection mechanism, which includes a docking valve, a collection box, and a discharge port. The collection box is located at the bottom inside the sampling housing, the docking valve is located on the collection box, and the discharge port is located on one side of the collection box. The docking valve is compatible with the sampling port.

10. A sampling method for testing the mobility of shale oil, employing the sampling device for testing the mobility of shale oil as described in claim 9, characterized in that, Includes the following steps: The sampling device is installed in the shale oil well. The sampling port is located inside the sampling tank, and sample oil is extracted from the well through the sampling port. After extraction is completed, the drive motor is started to drive the linkage transfer unit to operate; The linkage transfer unit causes the sampling port to detach from the sampling slot and transfer to the inside of the sampling housing; After the sampling port enters the sampling housing, it touches the downward activation mechanism, which in turn activates the high-pressure backwash nozzle to spray high-pressure water to clean the contaminants in the sampling port.

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