A device for detecting residual oil in fractured reservoirs

Abstract

This invention provides a residual oil detection device for fractured-vuggy reservoirs, comprising: a housing; a logging instrument disposed inside the housing; a fixing plate for vertically fixing the logging instrument, the fixing plate being disposed inside the housing and above the logging instrument; a transmission mechanism for adjusting the vertical position of the fixing plate; and a fixing mechanism for horizontally fixing the logging instrument; wherein the fixing mechanism and the transmission mechanism are linked, and the transmission mechanism can simultaneously drive the fixing plate and the fixing mechanism to fix the logging instrument inside the housing.

Description

Technical Field

[0001] This invention belongs to the field of residual oil detection technology in reservoirs, and specifically relates to a residual oil detection device for fractured-vuggy reservoirs. Background Technology

[0002] An oil reservoir refers to a basic accumulation of oil within a single trap under the same pressure system. If only petroleum is accumulated in a trap, it is called an oil reservoir; if only natural gas is accumulated, it is called a gas reservoir. When an oil reservoir contains several oil-bearing sand layers, it is called a multi-layered oil reservoir. Pulsed neutron technology is mainly used in the petroleum industry and is a logging technique for evaluating remaining oil. Pulsed neutron logging instruments can accurately detect reservoir conditions (the distribution of oil, gas, and water within the reservoir, etc.), determine the remaining oil saturation, a key reservoir parameter after oilfield development, and thus provide a basis for studying the distribution patterns of remaining oil, studying intra-layer water flooding differences, identifying gas-bearing layers and oil-water interfaces, determining water-blocking layers, and judging lithology.

[0003] Existing pulsed neutron logging instruments lack protective features during use. Most are placed on support plates and exposed to the air, making them susceptible to impacts and difficult to carry. Furthermore, the lack of protection during transport and use makes them prone to shaking, which can easily damage them and compromise their stability, ultimately reducing the accuracy of the measurement results. Summary of the Invention

[0004] To address the technical problems described above, this invention aims to provide a residual oil detection device for fractured-vuggy reservoirs. This device can effectively protect the logging instrument from external impacts and can also effectively fix the logging instrument, greatly improving its stability.

[0005] Therefore, according to the present invention, a residual oil detection device for fractured-vuggy reservoirs is provided, comprising: a housing;

[0006] The logging instrument is arranged inside the casing;

[0007] A mounting plate for vertically securing the logging tool, the mounting plate being disposed inside the housing and positioned above the logging tool; and

[0008] A transmission mechanism for adjusting the vertical position of the fixed plate;

[0009] A fixing mechanism for securing the logging tool in the lateral direction;

[0010] The fixing mechanism and the transmission mechanism are linked together. The transmission mechanism can drive the fixing plate and the fixing mechanism simultaneously to fix the logging instrument inside the outer shell.

[0011] In one embodiment, a first pad is fixed on the bottom plate of the housing, and a second pad is fixed on the lower end surface of the fixing plate, with the logging instrument positioned between the first pad and the second pad.

[0012] In one embodiment, the transmission mechanism includes:

[0013] A drive shaft is arranged oppositely within the transverse sidewall of the housing, one of the drive shafts having its upper end pass through the top plate of the housing and extend outward for connection to a drive motor;

[0014] A first transmission assembly is provided, in which the two transmission shafts are connected and driven by the drive motor to rotate both transmission shafts simultaneously; and

[0015] Two lifting screws are symmetrically distributed in the horizontal direction. One end of each lifting screw is fixedly connected to the fixed plate, and the other end is connected to the corresponding drive shaft through a second transmission assembly.

[0016] The transmission shaft can drive the corresponding lifting screw to move synchronously in the vertical direction through the first transmission component and the second transmission component, so that the fixed plate moves in the vertical direction.

[0017] In one embodiment, the first transmission component includes:

[0018] The first transmission sprockets are respectively fixedly installed at the lower end of the corresponding transmission shafts;

[0019] A first transmission chain adapted to the first transmission sprocket;

[0020] The bottom plate of the outer casing has a first cavity extending axially, and the first transmission assembly is arranged in the first cavity.

[0021] In one embodiment, the second transmission component includes:

[0022] A transmission sleeve fitted onto the lifting screw;

[0023] The second transmission sprocket is fixedly mounted on the transmission shaft and the transmission sleeve respectively; and

[0024] A second drive chain adapted to the second drive sprocket;

[0025] The transmission sleeve and the lifting screw are connected by a thread, and the transmission shaft can drive the transmission sleeve to rotate through the second transmission sprocket and the second transmission chain, thereby causing the lifting screw to move vertically.

[0026] In one embodiment, the fixing mechanism includes fixing units symmetrically arranged on both sides of the logging tool, the fixing unit comprising:

[0027] A bevel gear transmission component includes a driving bevel gear fixedly mounted on the transmission shaft, a driven bevel gear meshing with the driving bevel gear and distributed perpendicularly to each other, and a central shaft connected to the driven bevel gear. The transmission shaft can drive the bevel gear transmission component to rotate the central connecting shaft.

[0028] A connecting sleeve adapted to the central shaft, the end of which is fixed with a pressing block; rotating the central shaft allows the connecting sleeve to drive the pressing block to move laterally.

[0029] A connecting block is fixed to the bottom plate of the outer casing, and the connecting sleeve passes through the connecting block and forms a sliding fit with the connecting block;

[0030] The two fixing units can simultaneously apply relative forces to the logging tool under the action of the corresponding drive shafts to fix the logging tool in the lateral direction.

[0031] In one embodiment, a second cavity is provided within the transverse sidewall of the housing, the drive shaft passes through the corresponding second cavity, and the bevel gear transmission element is arranged within the second cavity.

[0032] In one embodiment, the drive shaft is connected to the corresponding first drive sprocket, second drive sprocket, and drive bevel gear via torque limiters.

[0033] In one embodiment, symmetrically distributed limiting blocks are fixed on the transverse side end face of the fixed plate, and symmetrically distributed limiting grooves are provided on the inner wall surface of the transverse side wall of the outer shell. The limiting blocks are adapted to be installed in the corresponding limiting grooves and can slide vertically along the limiting grooves.

[0034] In one embodiment, a plurality of preload springs are provided between the top plate of the housing and the fixed plate, and the two ends of the preload springs are respectively fixedly connected to the top plate of the housing and the fixed plate.

[0035] In one embodiment, a stabilizing mechanism for fixing the fixing plate is further included. The stabilizing mechanism includes two stabilizing units symmetrically distributed on both sides of the logging tool. The stabilizing unit includes:

[0036] A fixing block is fixedly connected to the lower end face of the fixing plate, and the fixing block has slots on both sides of its lateral direction;

[0037] The shell is constructed with an opening at the top, and the shell is embedded in the transverse sidewall of the outer shell;

[0038] A box is fixed in the inner cavity of the housing by a connecting plate. A pusher block that can move vertically along the box is provided in the box. The upper end of the pusher block passes through the top surface of the box.

[0039] The clamping component includes rotating rods symmetrically distributed on both sides of the box body and push rods hinged between the corresponding rotating rods and push blocks. One end of each rotating rod is hinged to the box body, and the other end is fixed with a locking block for fitting with the slot.

[0040] The third transmission assembly includes a threaded rod that passes through the bottom surface of the housing and is fixedly connected to the push block, a threaded block sleeved on the threaded rod, a third transmission sprocket that is fixedly installed on the transmission shaft and the threaded block respectively, and a third transmission chain that is adapted to the third transmission sprocket.

[0041] The drive shaft is connected to the corresponding third drive sprocket via a torque limiter. The drive shaft can drive the threaded rod to move the push block downward through the third drive assembly, so that the push block drives the push rod to rotate inward and pulls the rotating rod to rotate inward, so that each of the locking blocks is locked into the corresponding locking slot, thereby clamping the fixing block by the clamping member.

[0042] In one embodiment, sliders are fixed on both sides of the push block, and a vertically extending groove is provided on the inner wall surface of the transverse sidewall of the housing. The sliders are adapted to be installed in the groove, and the push block can drive the sliders to move along the groove.

[0043] In one embodiment, the stabilizing unit further includes an auxiliary element disposed between the rotating rod and the housing. The auxiliary element includes a plurality of evenly distributed telescopic rods and telescopic springs sleeved on the telescopic rods. The two ends of the telescopic rods are respectively hinged to the rotating rod and the inner wall surface of the housing.

[0044] The telescopic spring can extend the telescopic rod and apply a force toward the fixed block to the rotating rod when the fixing unit clamps the fixed block, thereby assisting the clamping block in clamping the fixed block.

[0045] In one embodiment, a cooling fan is provided on the outer side of the rear sidewall of the housing for cooling the interior of the housing.

[0046] Compared with the prior art, the advantages of this application are:

[0047] The fractured-vuggy reservoir residual oil detection device of the present invention effectively protects the logging instrument by fixing it inside the outer casing and securing it with a fixing plate, thus preventing the logging instrument from being impacted by external forces. The fixing plate vertically fixes the logging instrument, and the fixing plate is further secured by a stabilizing mechanism, effectively ensuring the stability of the logging instrument. Furthermore, the fixing structure simultaneously secures the logging instrument horizontally, effectively preventing shaking during use and achieving effective fixation, greatly improving its stability. In addition, the fractured-vuggy reservoir residual oil detection device effectively dissipates heat from the logging instrument inside the casing, ensuring a good working environment and preventing overheating and burnout of the electrical components due to prolonged operation. Moreover, the fractured-vuggy reservoir residual oil detection device is easy to use and convenient for operators to carry. Attached Figure Description

[0048] The present invention will now be described with reference to the accompanying drawings.

[0049] Figure 1 The structure of the slotted reservoir residual oil detection device according to the present invention is schematically shown.

[0050] Figure 2 yes Figure 1 A cross-sectional view of the residual oil detection device for a fractured-vuggy reservoir.

[0051] Figure 3 yes Figure 2 A magnified view of region A in the middle.

[0052] Figure 4 yes Figure 2 A magnified view of region B in the middle.

[0053] Figure 5 This is a rear view of the residual oil detection device for the fractured-vuggy reservoir shown in Figure 1.

[0054] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0055] The present invention will now be described with reference to the accompanying drawings. It should be noted that these descriptions are provided merely to illustrate the principles of the invention and do not limit the scope of the invention.

[0056] In this application, it should be noted that... Figure 1The X-axis direction is defined as the horizontal direction, i.e., the left-right direction; the Y-axis direction is defined as the vertical direction, i.e., the front-back direction; and the Z-axis direction is defined as the vertical direction, i.e., the up-down direction. It should also be noted that the directional terms or qualifiers used in this application, such as "up," "down," "left," "right," "front," and "back," are all specific to the referenced appendix. Figure 1 The references to this invention are merely for the purpose of facilitating description and simplification, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0057] Figure 1 The structure of the residual oil detection device 100 for slotted reservoirs according to the present invention is schematically shown. Figure 1 As shown, the fractured-vuggy reservoir residual oil detection device 100 includes a housing 1, a logging instrument 3, a fixing plate 4, a transmission mechanism 50, and a fixing mechanism 60. The logging instrument 3 is arranged inside the housing 1. The fixing plate 4 is located inside the housing 1 and above the logging instrument 3, and is used to fix the logging instrument 3 vertically. The transmission mechanism 50 is used to adjust the vertical position of the fixing plate 4. The fixing mechanism 60 is used to fix the logging instrument 3 horizontally. The fixing mechanism 60 and the transmission mechanism 50 are linked, and the transmission mechanism 50 can simultaneously drive the fixing plate 4 and the fixing mechanism 60 to fix the logging instrument 3 inside the housing 1, thereby keeping the logging instrument 3 stable. Thus, the housing 1 provides effective protection for the logging instrument 3.

[0058] like Figure 1 As shown, in one embodiment, the outer casing 1 can be constructed as a cuboid structure with an internal cavity in which the logging instrument 3 is arranged. The outer casing 1 includes a bottom plate, a top plate, left and right opposite sidewalls (lateral sidewalls), and front and rear opposite sidewalls.

[0059] A first pad 2 is fixed to the bottom plate of the outer casing 1, and a second pad 5 is fixed to the lower end surface of the fixing plate 4. The logging instrument 3 is located between the first pad 2 and the second pad 5. In one embodiment, both the first pad 2 and the second pad 5 are rubber pads. This can prevent damage to the logging instrument 3.

[0060] According to the present invention, such as Figure 1 As shown, symmetrically distributed limiting blocks 26 are fixed on the transverse side end face of the fixed plate 4. Simultaneously, symmetrically distributed limiting grooves 261 are provided on the inner wall surface of the transverse side wall of the outer shell 1. The limiting blocks 26 are fitted into the corresponding limiting grooves 261 and can slide vertically along the limiting grooves 261. This ensures the stability of the fixed plate 4 during adjustment and effectively prevents the fixed plate 4 from wobbling left and right.

[0061] In one embodiment, a plurality of preload springs 27 may be provided between the top plate of the outer casing 1 and the fixed plate 4, with both ends of the preload springs 27 fixedly connected to the top plate of the outer casing 1 and the fixed plate 4, respectively. Preferably, the plurality of preload springs 27 are symmetrically and evenly distributed in the transverse direction and located at the middle position in the longitudinal direction. The preload springs 27 can apply a downward force to the fixed plate 4 to form a preload force on the fixed plate 4, which not only facilitates the adjustment of the fixed plate 4, but also facilitates the fixing of the logging instrument 3 by the fixed plate 4.

[0062] According to the present invention, such as Figure 2 As shown, the transmission mechanism 50 includes two transmission shafts 6, a first transmission assembly, two lifting screws 22, and two sets of second transmission assemblies. The two transmission shafts 6 are arranged opposite each other within the transverse sidewall of the housing 1 and extend vertically. The upper end of one transmission shaft 6 passes through the top plate of the housing 1 and extends outward to connect to a drive motor (not shown). The end of this transmission shaft 6 extending outward from the upper part of the housing 1 serves as the input end of the transmission mechanism 50, connecting to the output shaft of the drive motor. Preferably, the drive motor is connected to the transmission shaft 6 via a reducer (not shown). The two transmission shafts 6 form a transmission connection through the first transmission assembly, enabling the drive motor to drive both transmission shafts 6 to rotate simultaneously. The two lifting screws 22 are symmetrically distributed laterally. One end of each lifting screw 22 is fixedly connected to the fixed plate 4, and the other end forms a transmission connection with the corresponding transmission shaft 6 via the second transmission assembly. The transmission shafts 6 can drive the corresponding lifting screws 22 to move synchronously vertically via the first and second transmission assemblies, thereby causing the fixed plate 4 to move vertically. This achieves vertical adjustment of the fixed plate 4.

[0063] Preferably, the transmission mechanism 50 is located at the longitudinal center of the housing 1.

[0064] In one embodiment, the first transmission component may be a sprocket-chain transmission mechanism.

[0065] like Figure 2 As shown, a first cavity extending laterally is provided inside the bottom plate of the outer casing 1, and a first transmission assembly is arranged within the first cavity. The first transmission assembly includes first transmission sprockets 28 respectively fixedly mounted on the lower ends of corresponding transmission shafts 6, and first transmission chains 29 adapted to the two first transmission sprockets 28. In use, the transmission shaft 6 connected to the drive motor drives the corresponding first transmission sprocket 28 to rotate under the action of the drive motor. The first transmission sprocket 28 drives the first transmission chain 29 to drive the corresponding first transmission sprocket 28 fixed on another transmission shaft 6, thereby driving the other transmission shaft 6 to rotate. Thus, the synchronous rotation of the two transmission shafts 6 is achieved through the first transmission assembly.

[0066] In one embodiment, the second transmission component may be a sprocket-chain transmission mechanism.

[0067] like Figure 2 As shown, symmetrically distributed mounting cavities are provided inside the top plate of the outer casing 1, extending laterally. Each second transmission assembly is arranged within a corresponding mounting cavity. Each set of second transmission assemblies includes a transmission sleeve 23 mounted on the lifting screw 22, a second transmission sprocket 24 fixedly mounted on the transmission shaft 6 and the transmission sleeve 23 respectively, and a second transmission chain 25 adapted to the second transmission sprocket 24. The second transmission sprocket 24 is selected according to the dimensions of the transmission shaft 6 and the transmission sleeve 23. The transmission sleeve 23 forms a threaded connection with the lifting screw 22, and passes through the top plate of the outer casing 1, forming a rotatable connection with the top plate. The transmission shaft 6 can drive the transmission sleeve 23 to rotate via the second transmission sprocket 24 and the second transmission chain 25, thereby causing the lifting screw 22 to move vertically, and subsequently driving the fixed plate 4 to move vertically via the lifting screw 22. Thus, the second transmission assembly enables vertical adjustment of the fixed plate 4.

[0068] In practical operation, a drive motor rotates one transmission shaft 6, which in turn drives the other transmission shaft 6 to rotate synchronously via a first transmission assembly. This, in turn, causes both transmission shafts 6 to simultaneously drive their respective second transmission assemblies, achieving synchronous adjustment of the two symmetrically distributed lifting screws 22. This, in turn, allows for vertical adjustment of the fixing plate 4. When the lifting screws 22 are driven to move the fixing plate 4 vertically downwards, the fixing plate 4 applies a downward force to the logging instrument 3, thus fixing the logging instrument 3 vertically within the housing 1. The symmetrical distribution of the two lifting screws 22 and their corresponding second transmission assemblies effectively ensures the stability of the fixing plate 4 during adjustment and facilitates the effective fixation of the logging instrument 3.

[0069] According to the present invention, such as Figure 2 As shown, the fractured-vuggy reservoir residual oil detection device 100 also includes a stabilization mechanism 70 for fixing the fixing plate 4. The stabilization mechanism 70 includes two stabilization units symmetrically distributed on both sides of the logging tool 3. Preferably, the stabilization mechanism 70 is located inside the housing 1 and at the longitudinal center.

[0070] like Figure 3As shown, the stabilizing unit includes a housing 7, a box 8, a connecting plate 9, a pusher 10, two fixing blocks 13, a clamping component, and a third transmission assembly. The housing 7 is constructed as a cavity structure with an open top, and is embedded in the inner wall of the transverse sidewall of the outer shell 1. The two fixing blocks 13 are respectively fixedly connected to the lower end face of the fixing plate 4 and are symmetrically distributed in the transverse direction. Symmetrically distributed slots are provided on both sides of the fixing blocks 13 in the transverse direction. The box 8 is fixed in the inner cavity of the housing 7 by the connecting plate 9, and the connecting plate 9 is fixedly sleeved on the box 8 and fixedly connected to the inner wall of the housing 7. A pusher 10 that can move vertically along the box 8 is provided in the box 8, and the upper end of the pusher 10 passes through the top surface of the box 8.

[0071] The clamping components include rotating rods 11 symmetrically distributed on both sides of the housing 8, and push rods 14 hinged between the corresponding rotating rods 11 and push blocks 10. The rotating rods 11 are configured in a roughly "J" shape, with the "J" shape installed inverted, and one end of the rotating rod 11 ( Figure 3 The lower end of the rotating rod 11 is hinged to the housing 8. A first hinge portion is provided on both sides of the housing 8, near the upper end, and the lower end of the rotating rod 11 is hinged to this first hinge portion. A locking block 12 for fitting into a locking slot is fixed to the other end of the rotating rod 11. The locking block 12 is located on the side of the rotating rod 11 near the fixing block 13. A push rod 14 is located on the side of the rotating rod 11 near the fixing block 13. Two second hinge portions are provided on the upper end of the push block 10, which are symmetrically distributed laterally. One end of the push rod 14 is hinged to the corresponding second hinge portion, and the other end of the push rod 14 is hinged to the side of the rotating rod 11 near the fixing block 13.

[0072] In one embodiment, sliders 21 are fixed on both sides of the push block 10, and a vertically extending groove is provided on the inner wall of the horizontal side wall of the housing 8. The sliders 21 are adapted to be installed in the groove, and the push block 10 can drive the sliders 21 to move along the groove.

[0073] The third transmission assembly includes a threaded rod 17 that passes through the bottom surface of the housing 8 and is fixedly connected to the push block 10, a threaded block 18 sleeved on the threaded rod 17, a third transmission sprocket 19 that is fixedly mounted on the transmission shaft 6 and the threaded block 18 respectively, and a third transmission chain 20 adapted to the third transmission sprocket 19. The threaded block 18 is threadedly connected to the threaded rod 17, and the threaded block 18 is rotatably connected to the bottom plate of the housing 7 and passes through the bottom plate of the housing 7. The transmission shaft 6 can drive the threaded rod 17 through the third transmission assembly to drive the push block 10 to move downward, thereby causing the push block 10 to drive the push rod 14 to rotate inward and pull the rotating rod 11 to rotate inward, so that each locking block 12 is engaged in the corresponding locking slot, thereby clamping the fixing block 13.

[0074] In this embodiment, an installation cavity is provided in the transverse side wall of the outer shell 1, and the internal space of the shell 7 is connected to the installation cavity to form an installation space, and the third transmission component is arranged in the installation space.

[0075] During operation, the drive shaft 6 rotates, driving the third drive sprocket 19 fixedly mounted on the drive shaft 6. This third drive sprocket 19 drives the third drive chain 20, which in turn drives the threaded block 18 to rotate, thereby driving the threaded rod 17 to move vertically, thus enabling the push block 10 to move vertically. When the push block 10 moves downwards, it drives the push rod 14 to rotate inwards, causing the rotating rod 11 to rotate inwards along the housing 8. This causes the upper end of the rotating rod 11 to approach the fixed block 13, allowing the locking block 12 to engage with the corresponding slot in the fixed block 13. The two rotating rods 11 clamp the left and right sides of the fixed block 13 respectively, thus fixing the fixed block 13 and the fixing plate 4 fixedly connected to it. The two symmetrically distributed stabilizing units simultaneously fix the fixed plate 4, achieving uniform and symmetrical action on it, which further improves the stability of the logging tool 3.

[0076] According to the present invention, such as Figure 3 As shown, the stabilizing unit also includes auxiliary components disposed between the rotating rod 11 and the housing 7. These auxiliary components include multiple evenly distributed telescopic rods 16 and telescopic springs 15 sleeved on the telescopic rods 16. The two ends of the telescopic rods 16 are hinged to the rotating rod 11 and the inner wall of the housing 7, respectively. When the fixing unit clamps the fixing block 13, the telescopic springs 15 can extend the telescopic rods 16 and apply a force towards the fixing block 13 to the rotating rod 11, thereby assisting the clamping action of the locking block 12 on the fixing block 13. This allows the locking block 12 on the rotating rod 11 to clamp the fixing block 13 with greater force, thus providing an auxiliary clamping effect.

[0077] According to the present invention, such as Figure 2 As shown, the fixing mechanism 60 includes fixing units symmetrically arranged on both sides of the logging tool 3 in the lateral direction. Preferably, the fixing units are located near the bottom of the outer casing 1. The two fixing units can simultaneously apply relative forces to the logging tool 3 under the action of their respective drive shafts 6, thereby fixing the logging tool 3 in the lateral direction.

[0078] like Figure 4As shown, the fixing unit includes a bevel gear transmission component, a connecting sleeve 34, and a connecting block 35. The bevel gear transmission component includes a driving bevel gear 31 fixedly mounted on a transmission shaft 6, a driven bevel gear 32 meshing with the driving bevel gear 31 and distributed perpendicularly to it, and a central shaft 33 connected to the driven bevel gear 32. The transmission shaft 6 can drive the bevel gear transmission component to rotate the central shaft 33. A second cavity is provided in the transverse side wall of the outer casing 1, through which the transmission shaft 6 passes, and the bevel gear transmission component is arranged in the second cavity. The connecting sleeve 34 is adapted to the central shaft 33, and a pressing block 36 is fixed at the end of the connecting sleeve 34. In one embodiment, the connecting sleeve 34 is threadedly connected to the central shaft 33, and by rotating the central shaft 33, the connecting sleeve 34 can drive the pressing block 36 to move laterally.

[0079] In one embodiment, a connecting block 35 is fixed on the bottom plate of the housing 1, and a connecting sleeve 34 passes through the connecting block 35 and forms a sliding fit with the connecting block 35.

[0080] In actual operation, the drive shaft 6 rotates and drives the active bevel gear 31 to rotate. The active bevel gear 31 drives the driven bevel gear 32, which meshes with it, to rotate, thereby driving the central shaft 33 to rotate. The forward and reverse rotation of the central shaft 33 drives the connecting sleeve 34 to move laterally, thereby driving the extrusion block 36, which is fixedly connected to the connecting sleeve 34, to move laterally. When the extrusion blocks 36 on both sides move laterally inward, they apply two opposing forces to the logging instrument 3 inside the outer casing 1, thereby fixing the logging instrument 3 laterally. This can effectively prevent the logging instrument 3 from swaying left and right, and further improve the stability of the logging instrument 3.

[0081] According to one embodiment of the present invention, the drive shaft 6 is connected to the corresponding first drive sprocket 28, second drive sprocket 24, third drive sprocket 19, and drive bevel gear 31 via torque limiters. The torque limiters restrict the torque between the drive shaft 6 and the first drive sprocket 28, second drive sprocket 24, third drive sprocket 19, and drive bevel gear 31, thereby limiting the torque transmitted by the drive shaft 6 in a slip-out manner. The connection can automatically reconnect after the overload condition disappears. This effectively prevents damage to the individual sprockets or chains, avoids costly downtime losses, and provides effective protection.

[0082] According to the present invention, the fractured reservoir residual oil detection device 100 further includes a cooling fan 37 for cooling the interior of the outer casing 1. Figure 5 As shown, the cooling fan 37 is fixedly installed on the outer side of the rear side wall 101 of the housing 1. Preferably, the cooling fan 37 is embedded in the rear side wall 101 of the housing 1. During operation, the cooling fan 37 can effectively cool the inside of the housing 1, thereby effectively ensuring that the logging instrument 3 is within the normal operating temperature range.

[0083] According to the present invention, the residual oil detection device 100 for fractured-vuggy reservoirs further includes two latches 30, which are respectively located on the left and right sides of the outer casing 1 and fixedly connected to the outer casing 1. Operators can hold the two latches 30 to move the logging instrument 3.

[0084] The working process of the residual oil detection device 100 for fractured-vuggy reservoirs according to the present invention is briefly described below. A drive motor provides power to drive the transmission shaft 6 extending from the upper end of the outer casing 1 to rotate. This transmission shaft 6 drives another transmission shaft 6 to rotate synchronously via a first transmission assembly. Thus, the two transmission shafts 6 simultaneously drive the lifting screw 22 to move vertically via corresponding second transmission assemblies, achieving synchronous adjustment of the two symmetrically distributed lifting screws 22, thereby driving the fixing plate 4 to move vertically. When the lifting screw 22 is driven to move the fixing plate 4 vertically downwards, the fixing plate 4 applies a downward force to the logging instrument 3, thereby fixing the logging instrument 3 vertically within the outer casing 1.

[0085] During the rotation of the drive shaft 6, each drive shaft 6 drives the corresponding third transmission component to drive the threaded rod 17 to move vertically, thereby driving the push block 10 to move vertically. When the fixed plate 4 moves downward, the push block 10 moves downward simultaneously, and the push block 10 drives the push rod 14 to rotate inward, thereby driving the rotating rod 11 to rotate inward along the housing 8, so that the upper end of the rotating rod 11 approaches the fixed block 13, thereby causing the locking block 12 to be embedded into the corresponding locking groove of the fixed block 13. The two rotating rods 11 clamp the left and right sides of the fixed block 13 respectively, thereby fixing the fixed block 13, and thus fixing the fixed plate 4 fixedly connected to the fixed block 13. The two symmetrically distributed stabilizing units, driven by their respective drive shafts, simultaneously fix the fixed plate 4, achieving uniform and symmetrical action on the fixed plate 4, which significantly improves the stability of the logging tool 3.

[0086] Simultaneously, as the drive shaft 6 rotates, it drives the active bevel gear 31 in the corresponding fixed unit to rotate. The active bevel gear 31 drives the driven bevel gear 32 meshing with it to rotate, which in turn drives the central shaft 33 to rotate. The forward and reverse rotation of the central shaft 33 drives the connecting sleeve 34 to move laterally, thereby driving the extrusion block 36 fixedly connected to the connecting sleeve 34 to move laterally. The relatively distributed fixed units move synchronously. When the extrusion blocks 36 on both sides move laterally inward, they apply two opposing forces to the logging instrument 3 inside the outer casing 1, thereby fixing the logging instrument 3 laterally. This effectively prevents the logging instrument 3 from swaying left and right, further improving the stability of the logging instrument 3.

[0087] The fractured-vuggy reservoir residual oil detection device 100 of the present invention effectively protects the logging instrument 3 by fixing it inside the outer casing 1 and securing it with a fixing plate 4, thus preventing the logging instrument 3 from being impacted by external forces. The device 100 can vertically fix the logging instrument 3 with the fixing plate 4 and secure the fixing plate 4 with the stabilizing mechanism 70, effectively ensuring the stability of the logging instrument 3. Furthermore, the fixing mechanism 60 can simultaneously fix the logging instrument 3 horizontally, effectively preventing shaking during use and achieving effective fixation, greatly improving the stability of the logging instrument 3. In addition, the fractured-vuggy reservoir residual oil detection device 100 can effectively dissipate heat from the logging instrument 3 inside the outer casing 1, ensuring a good working environment for the logging instrument 3 and effectively preventing the electrical components inside the logging instrument 3 from overheating and burning out due to prolonged operation. In addition, the fractured-vuggy reservoir residual oil detection device 100 is easy to use and convenient for staff to carry.

[0088] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0089] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A residual oil detection device for fractured-vuggy reservoirs, comprising: Outer shell (1); The logging instrument (3) is arranged inside the outer casing; A fixing plate (4) for fixing the logging instrument vertically, the fixing plate being arranged inside the housing and above the logging instrument; as well as A transmission mechanism (50) for adjusting the vertical position of the fixed plate; Fixing mechanism (60) for fixing the logging instrument in the lateral direction. The fixing mechanism and the transmission mechanism are linked, and the transmission mechanism can simultaneously drive the fixing plate and the fixing mechanism to fix the logging instrument inside the outer casing. It also includes a stabilizing mechanism (70) for fixing the fixed plate, the stabilizing mechanism including two stabilizing units symmetrically distributed on the lateral sides of the logging instrument, the stabilizing unit including a fixing block (13) fixedly connected to the lower end face of the fixed plate, the fixing block having slots on both lateral sides; a housing (7) with an open upper end, the housing being embedded in the lateral side wall of the outer shell; a box (8) fixed in the inner cavity of the housing by a connecting plate (9), the box having a push block (10) capable of moving vertically along the box, the upper end of the push block passing through the top surface of the box; a clamping member, which includes rotating rods (11) symmetrically distributed on the lateral sides of the box and a push rod (14) hinged between the corresponding rotating rod and the push block, one end of the rotating rod being connected to the box. The body is hinged, and the other end is fixed with a locking block (12) for fitting the locking slot; the third transmission assembly includes a threaded rod (17) that passes through the bottom surface of the housing and is fixedly connected to the push block, a threaded block (18) sleeved on the threaded rod, a third transmission sprocket (19) that is fixedly installed on the transmission shaft and the threaded block respectively, and a third transmission chain (20) that fits the third transmission sprocket; wherein, the transmission shaft and the corresponding third transmission sprocket are connected by a torque limiter, and the transmission shaft can drive the threaded rod to drive the push block to move downward through the third transmission assembly, so that the push block drives the push rod to rotate inward and pulls the rotating rod to rotate inward, so that each locking block is locked into the corresponding locking slot, thereby clamping the fixing block with the clamping member.

2. The residual oil detection device for fractured-vuggy reservoirs according to claim 1, characterized in that, A first pad (2) is fixed on the bottom plate of the outer casing, and a second pad (5) is fixed on the lower end surface of the fixing plate. The logging instrument is located between the first pad and the second pad.

3. The residual oil detection device for fractured-vuggy reservoirs according to claim 1, characterized in that, The transmission mechanism includes: A drive shaft (6) is arranged oppositely in the transverse sidewall of the housing, one of the drive shafts having its upper end pass through the top plate of the housing and protrude outward for connection to a drive motor; A first transmission assembly is provided, in which the two transmission shafts are connected and driven by the drive motor to rotate both transmission shafts simultaneously; and Two lifting screws (22) are symmetrically distributed in the horizontal direction. One end of the lifting screw is fixedly connected to the fixed plate, and the other end is connected to the corresponding transmission shaft through the second transmission assembly. The transmission shaft can drive the corresponding lifting screw to move synchronously in the vertical direction through the first transmission component and the second transmission component, so that the fixed plate moves in the vertical direction.

4. The residual oil detection device for fractured-vuggy reservoirs according to claim 3, characterized in that, The first transmission assembly includes: The first transmission sprockets (28) are respectively fixedly installed at the lower end of the corresponding transmission shafts. A first transmission chain (29) adapted to the first transmission sprocket; The bottom plate of the outer casing has a first cavity extending axially, and the first transmission assembly is arranged in the first cavity.

5. The residual oil detection device for fractured-vuggy reservoirs according to claim 4, characterized in that, The second transmission assembly includes: A transmission sleeve (23) fitted onto the lifting screw; The second transmission sprocket (24) is fixedly mounted on the transmission shaft and the transmission sleeve respectively; and A second transmission chain (25) adapted to the second transmission sprocket; The transmission sleeve and the lifting screw are connected by a thread, and the transmission shaft can drive the transmission sleeve to rotate through the second transmission sprocket and the second transmission chain, thereby causing the lifting screw to move vertically.

6. The residual oil detection device for fractured-vuggy reservoirs according to claim 5, characterized in that, The fixing mechanism includes fixing units symmetrically arranged on both sides of the logging tool, and the fixing unit includes: The bevel gear transmission component includes a driving bevel gear (31) fixedly mounted on the transmission shaft, a driven bevel gear (32) meshing with the driving bevel gear and distributed perpendicularly to each other, and a central shaft (33) connected to the driven bevel gear. The transmission shaft can drive the bevel gear transmission component to rotate the central connecting shaft. A connecting sleeve (34) adapted to the central shaft, the end of which is fixed with an extrusion block (36), and rotating the central shaft enables the connecting sleeve to drive the extrusion block sleeve to move laterally; and A connecting block (35) is fixed to the bottom plate of the outer casing, and the connecting sleeve passes through the connecting block and forms a sliding fit with the connecting block; The two fixing units can simultaneously apply relative forces to the logging instrument under the action of the corresponding drive shafts to fix the logging instrument in the lateral direction. A second cavity is provided in the lateral side wall of the outer shell, the drive shaft passes through the corresponding second cavity, and the bevel gear transmission component is arranged in the second cavity.

7. The residual oil detection device for fractured-vuggy reservoirs according to claim 6, characterized in that, The drive shaft is connected to the corresponding first drive sprocket, second drive sprocket, and drive bevel gear via torque limiters.

8. The residual oil detection device for fractured-vuggy reservoirs according to any one of claims 1 to 5, characterized in that, Multiple pre-tension springs (27) are provided between the top plate of the outer shell and the fixed plate. The two ends of the pre-tension springs are fixedly connected to the top plate of the outer shell and the fixed plate, respectively. Symmetrically distributed limiting blocks (26) are fixed on the transverse side end face of the fixed plate. Symmetrically distributed limiting grooves (261) are provided on the inner wall surface of the transverse side wall of the outer shell. The limiting blocks are adapted to be installed in the corresponding limiting grooves and can slide vertically along the limiting grooves.

9. The residual oil detection device for fractured-vuggy reservoirs according to claim 6, characterized in that, The stabilizing unit further includes an auxiliary element disposed between the rotating rod and the housing. The auxiliary element includes a plurality of evenly distributed telescopic rods (16) and telescopic springs (15) sleeved on the telescopic rods. The two ends of the telescopic rods are respectively hinged to the rotating rod and the inner wall surface of the housing. The telescopic spring can extend the telescopic rod and apply a force toward the fixed block to the rotating rod when the fixing unit clamps the fixed block, thereby assisting the clamping block in clamping the fixed block.

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