Oil and gas reservoir crack detection device and detection method

Abstract

The present invention relates to an oil and gas reservoir crack detection device and a detection method thereof, which belongs to the technical field of oil and gas reservoir crack detection. The device comprises a probe, an adjustment component, a moving component, a linkage component, a protective component and a drive component. The upper part of the probe is sleeved with the adjustment component, and the lower part of the probe is rotatably connected to the protective component. There are multiple moving components, and the multiple moving components are arranged at intervals along the circumference of the adjustment component. The adjustment component is hinged to one side of the moving component. The drive component is fixed on the probe, and the driving end of the drive component is transmission-connected to one end of the protective component. One side of the protective component is transmission-connected to the linkage component. The linkage component is located on the inner side of the moving component and is transmission-connected to the moving component, so as to ensure the stable movement of the probe in the wellbore.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas reservoir crack detection, and in particular to an oil and gas reservoir crack detection device and a detection method thereof. Background Art

[0002] Detection of fractures in oil and gas reservoirs is crucial for evaluating reservoir productivity and guiding oil and gas field development strategies. Fractures can significantly increase reservoir permeability and become the main channels for oil and gas migration and accumulation. Therefore, accurate identification and evaluation of fractures are of great significance for improving oil and gas recovery rates. In the detection of fractures in oil and gas reservoirs, the main purpose of sonic logging instruments is to identify the existence and characteristics of fractures by measuring the acoustic velocity of the formation. Sonic logging can provide information on formation elastic parameters, which are related to the density, aspect ratio, inclination and filling of the fracture. By analyzing the data obtained by sonic logging, the effectiveness of the fracture can be quantitatively evaluated.

[0003] Existing technology allows the probe and cable of the sonic logging instrument to be lowered into a pre-drilled hole and ensured to be correctly placed in the wellbore, so that cracks in the oil and gas reservoir can be detected. However, when the probe is lowered in the hole, it is lowered by the force of the falling cable by the cable winch, and it cannot be lowered steadily and gradually. If the cable winch releases the cable too quickly, the probe may fall directly to the bottom of the hole and be damaged, affecting its performance.

[0004] Therefore, an oil and gas reservoir crack detection device and a detection method thereof are provided to solve the problems raised in the above background technology. Summary of the Invention

[0005] The technical problem solved by the present invention is how to ensure the stable movement of the probe tube in the wellbore.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A device for detecting cracks in oil and gas reservoirs, comprising a probe, an adjusting component, a moving component, a linkage component, a protective component and a driving component. The upper part of the probe is sleeved with the adjusting component, and the lower part of the probe is rotatably connected to the protective component. There are multiple moving components, and the multiple moving components are arranged at circumferential intervals along the adjusting component. The adjusting component is hinged to one side of the moving component. The driving component is fixed on the probe, and the driving end of the driving component is transmission-connected to one end of the protective component. One side of the protective component is transmission-connected to the linkage component. The linkage component is located on the inner side of the moving component and is transmission-connected to the moving component.

[0007] The present invention provides the following beneficial effects: A worker adjusts the movable assembly using the adjustment assembly until the diameter enclosed by the movable assembly matches the wellbore diameter. Subsequently, the cable of the cable winch is fixedly connected to the end of the movable assembly to guide the movable assembly during movement. The drive assembly drives the rotation of the protective assembly, which in turn drives the rotation of the linkage assembly. The rotation of the linkage assembly drives the movable assembly along the length of the wellbore, thereby driving the probe tube to move stably along the length of the wellbore, improving the probe tube's detection performance.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] The adjusting ring is sleeved on the upper portion of the probe tube, and the adjusting ring is provided with a plurality of pressure plates at intervals along the circumference, one end of the pressure plate is hinged to the adjusting ring, and the other end of the pressure plate is hinged to one side of the movable assembly, and the pull ring assembly includes a pull block, a pull buckle, a pull rod, a card block and a spring, the pull block is fixedly connected to the adjusting ring, the pull block has a first slide groove, the pull rod is located in the first slide groove and is slidably connected to the first slide groove, one end of the pull rod is fixed with the pull buckle, the other end of the pull rod is fixed with the card block, the pull rod outer sleeve is provided with the spring, one end of the spring abuts against the pull block, and the other end of the spring abuts against the card block, the adjusting ring has a through hole corresponding to the card block, and the outer wall of the probe tube is provided with a plurality of card slots at intervals along the length direction, and the card block passes through the through hole and is engaged with the card slot.

[0010] The beneficial effect of adopting the above further scheme is: according to the set wellbore diameter, the pull ring assembly is moved so that the adjustment ring moves along the length direction of the probe tube, and then drives the pressure plate to squeeze the moving assembly along the width direction of the wellbore until the diameter enclosed by the moving assembly is the same as the wellbore diameter.

[0011] When the adjustment ring needs to be moved, the operator pulls the buckle outward, and the buckle is pulled outward along the first slide slot. At this time, the buckle exerts an outward force on the spring, compressing the spring to pull the card out of the slot, making it easier to select a slot in another position for engagement;

[0012] When the position to which the adjustment ring needs to be moved is determined, the operator pushes the pull buckle inward, and the pull buckle is pushed inward along the first slide groove. At this time, the pull buckle exerts an inward force on the spring, and the card block moves inward under the action of the elastic force, so that the card block is locked into the selected card slot.

[0013] Furthermore, it also includes a support assembly, which is located between the adjustment assembly and the protective assembly. There are multiple support assemblies, and the multiple support assemblies are arranged in a one-to-one correspondence with the multiple moving assemblies. The support assembly includes a support shell and a sliding rod. One end of the support shell is fixedly connected to the probe tube, one end of the sliding rod is slidably connected to the support shell, and the other end of the sliding rod is fixedly connected to the corresponding moving assembly.

[0014] The beneficial effect of adopting the above further solution is that the movement of the movable assembly along the width direction of the wellbore drives the movement of the sliding rod, and the sliding rod plays a guiding role in the movement of the movable assembly.

[0015] Furthermore, the moving assembly includes a moving plate, a first roller assembly and a second roller assembly. There are multiple moving plates, and the multiple moving plates are arranged in a one-to-one correspondence with the multiple supporting assemblies. The upper part of one side of the moving plate is hinged to the corresponding pressure plate, and the middle part of one side of the moving plate is fixedly connected to the other end of the sliding rod. The moving plate has a first groove, and the linkage assembly is located in the first groove. One end of the linkage assembly is rotatably connected to the inner wall of the first groove, and the other end of the linkage assembly is transmission-connected to the second roller assembly.

[0016] The beneficial effect of this further solution is that as the adjustment ring descends along the length of the probe tube into the depth of the wellbore, the pressure plate presses the movable plate outward, causing it to move to a predetermined position along the width of the wellbore. The rotation of the linkage assembly drives the rotation of the second roller assembly, which in turn drives the movable plate and the first roller assembly to move stably along the inner wall of the wellbore, thereby improving the detection performance of the probe tube.

[0017] Furthermore, the second roller assembly includes a second rotating shaft, two second rollers and first teeth. The second rotating shaft is fixedly connected to one end of the movable plate. The two second rollers are respectively rotatably connected to the two ends of the second rotating shaft. The two second rollers are provided with the first teeth at the ends facing each other. The first teeth are transmission-connected to the linkage assembly.

[0018] The beneficial effect of adopting the above further solution is that the rotation of the linkage assembly drives the rotation of the two second rollers on the second rotating shaft through the first teeth.

[0019] Furthermore, the linkage assembly includes a rotating rod, a connecting rod, second teeth, a second gear, a third gear and a fourth gear. One end of the rotating rod passes through the first groove and is fixed with the fourth gear. The fourth gear is respectively engaged with the first teeth for transmission. The other end of the rotating rod is rotatably connected to the other end of the first groove. The upper part of the rotating rod is fixed with the second teeth at intervals in the circumferential direction. The connecting rod is rotatably connected to the rotating rod, the second gear is fixedly connected to one end of the connecting rod, the second teeth are engaged with one end of the second gear for transmission, the other end of the connecting rod rotates through the first groove and is fixedly connected to the third gear, and the third gear is transmission-connected to the protective assembly.

[0020] The beneficial effect of adopting the above further solution is that the rotation of the guard assembly drives the rotation of the third gear, which in turn drives the rotation of the second gear via the connecting rod. The rotation of the second gear drives the rotation of the second teeth, which in turn drives the rotation of the rotating rod. The rotation of the rotating rod drives the rotation of the two second rollers via the fourth gear and the first teeth.

[0021] Furthermore, the protective assembly includes a protective ring, a fixed ring, a rotating ring, a third tooth, a positioning ring and a fourth tooth. The fixed sleeve of the lower part of the probe tube is provided with the fixed ring, and the fixed ring has a second slide groove. The lower part of the rotating ring is located in the second slide groove and is rotatably connected to the fixed ring. The protective ring is fixed to the upper part of the rotating ring, and the third tooth is fixed on the top of the rotating ring at intervals in the circumferential direction. The third tooth is transmission-connected to the driving assembly. The positioning ring is sleeved on the outer upper part of the protective ring, and the fourth tooth is fixed on the positioning ring at intervals in the circumferential direction. The fourth tooth is meshed with the third gear for transmission.

[0022] The beneficial effect of adopting the above further solution is that the drive assembly drives the third tooth to rotate, thereby driving the rotating ring to rotate in the second slide groove. The rotation of the rotating ring drives the protection ring to rotate, thereby driving the positioning ring to rotate. The rotation of the fourth tooth on the positioning ring drives the third gear to rotate.

[0023] Furthermore, the drive assembly includes a fixed frame, a motor and a fifth gear, one end of the fixed frame is fixedly connected to the upper part of the probe, the other end of the fixed frame is fixedly connected to the motor, the output shaft of the motor is fixedly connected to the fifth gear, and the fifth gear and the third gear are engaged for transmission.

[0024] The beneficial effect of adopting the above further solution is that the motor drives the fifth gear to rotate, and the rotation of the fifth gear drives the third tooth to rotate, thereby driving the rotation of the rotating ring.

[0025] Furthermore, it also includes a dustproof component, which includes a support rod, a fixed block, a rubber block and a fan blade. There are multiple support rods, and the multiple support rods are arranged axially at intervals along the fixed block. One end of the fixed block is fixedly connected to one end of the support rod, and the other end of the support rod is fixedly connected to the other end of the protective ring. The rubber block is fixed to the other end of the fixed block, and the rubber block is fixed with multiple fan blades at circumferential intervals.

[0026] The beneficial effect of adopting the above further solution is that the rotation of the protective ring can drive the rotation of the fixed block, rubber block and fan blades through the support rod. The rotation of multiple fan blades can generate rising wind force, which can prevent dust in the wellbore from sticking to the surface of the probe.

[0027] The present invention also provides a method for detecting cracks in oil and gas reservoirs, comprising the following steps:

[0028] Step 1: A wellbore is opened in the oil and gas field, and the movable assembly is adjusted by the adjusting assembly according to the wellbore diameter until the diameter formed by the movable assembly is the same as the wellbore diameter, and then the oil and gas reservoir fracture detection device is placed in the wellbore by a cable winch;

[0029] Step 2: The driving end of the driving assembly drives the protection assembly to rotate along the circumference of the probe tube, and the rotation of the protection assembly drives the linkage assembly to rotate;

[0030] Step 3: The rotation of the linkage assembly drives the moving assembly to move stably along the length direction of the inner wall of the wellbore, thereby driving the probe to move stably along the length direction of the inner wall of the wellbore. After the probe moves to a suitable position, the probe detects cracks in the oil and gas reservoir.

[0031] The beneficial effect is that after the adjustment assembly is moved along the length of the probe tube and the diameter formed by the movable assembly is made equal to the wellbore diameter, the device is placed in the wellbore via a cable winch. Subsequently, the driving end of the drive assembly drives the protective assembly to rotate along the circumference of the probe tube, thereby driving the linkage assembly to rotate. The kinetic energy generated by the linkage assembly drives the probe tube to move steadily downward along the length of the wellbore inner wall, thereby improving the detection performance of the probe tube.

[0032] Once the probe tube is lowered to the appropriate position, it can detect cracks in the oil and gas reservoir. After detection, the probe tube is pulled upward using a cable winch. The drive end of the drive assembly then reverses the direction of rotation of the protective assembly along the circumference of the probe tube, which in turn drives the linkage assembly in the opposite direction. The kinetic energy generated by the reverse rotation of the linkage assembly drives the probe tube to move steadily upward along the length of the wellbore inner wall, improving the probe tube's detection performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1Schematic diagram of the structure of the oil and gas reservoir crack detection device of the present invention;

[0034] Figure 2 It is a partial schematic diagram of the oil and gas reservoir crack detection device of the present invention;

[0035] Figure 3 for Figure 2 Partial schematic diagram at point A in the middle;

[0036] Figure 4 It is a structural schematic diagram of the regulating assembly of the present invention;

[0037] Figure 5 It is a structural diagram of the linkage assembly of the present invention;

[0038] Figure 6 It is a schematic structural diagram of the protection component and the driving component of the present invention;

[0039] Figure 7 It is a structural schematic diagram of the rotating ring of the present invention;

[0040] Figure 8 It is a cross-sectional view of the fixing ring of the present invention.

[0041] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0042] 1. Probe; 101. Slot; 2. Adjustment assembly; 201. Adjustment ring; 202. Pressure plate; 203. Pull ring assembly; 2031. Pull block; 2032. Pull buckle; 2033. Pull rod; 2034. Block; 2035. Spring; 2036. First slide; 3. Moving assembly; 301. Moving plate; 302. First roller assembly; 303. Second roller assembly; 3031. Second shaft; 3032. Second roller; 3033. First tooth; 304. First groove; 4. Linkage assembly; 401. Rotating rod; 402. Connecting rod; 4 03, second tooth; 404, second gear; 405, third gear; 406, fourth gear; 5, protective assembly; 501, protective ring; 502, fixed ring; 503, rotating ring; 504, third tooth; 505, positioning ring; 506, fourth tooth; 507, second slide; 6, drive assembly; 601, fixed bracket; 602, motor; 603, fifth gear; 7, dustproof assembly; 701, support rod; 702, fixed block; 703, rubber block; 704, fan blade; 8, support assembly; 801, support shell; 802, slide rod. DETAILED DESCRIPTION

[0043] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0044] like Figures 1-8As shown, this embodiment provides an oil and gas reservoir crack detection device, including a probe 1, an adjustment component 2, a moving component 3, a linkage component 4, a protection component 5 and a drive component 6. The upper part of the probe 1 is sleeved with the adjustment component 2, and the lower part of the probe 1 is rotatably connected to the protection component 5. There are multiple moving components 3, and the multiple moving components 3 are arranged at circumferential intervals along the adjustment component 2. The adjustment component 2 is hinged to one side of the moving component 3. The drive component 6 is fixed on the probe 1, and the driving end of the drive component 6 is transmission-connected to one end of the protection component 5. One side of the protection component 5 is transmission-connected to the linkage component 4. The linkage component 4 is located on the inner side of the moving component 3 and is transmission-connected to the moving component 3.

[0045] The operator adjusts the movable assembly 3 using the adjustment assembly until the diameter enclosed by the movable assembly 3 matches the wellbore diameter. Subsequently, the cable of the cable winch is fixedly connected to the end of the movable assembly 3 to guide the movable assembly 3 during movement. The drive assembly 6 drives the rotation of the protection assembly 5, which in turn drives the rotation of the linkage assembly 4. The rotation of the linkage assembly 4 drives the movable assembly 3 along the length of the wellbore, thereby driving the stable movement of the probe 1 along the length of the wellbore, improving the detection performance of the probe 1.

[0046] Specifically, in this embodiment, Figure 1 As shown, there are three moving components 3.

[0047] The upper outer wall of the probe tube 1 is sleeved with an adjustment component 2, and the lower outer wall of the probe tube 1 is rotatably connected to a protection component 5.

[0048] Specifically, in this embodiment, the driving assembly 6 is located between two adjacent moving assemblies 3 , one end of the driving assembly 6 is located above the adjusting assembly 2 , and is fixedly connected to the upper portion of the probe 1 .

[0049] In actual application, the diameter enclosed by the multiple moving components 3 will be slightly smaller than the wellbore diameter.

[0050] On the basis of the above scheme, the adjusting component 2 includes an adjusting ring 201, a pressure plate 202 and a pull ring assembly 203. The upper part of the probe 1 is sleeved with the adjusting ring 201, and the adjusting ring 201 is provided with multiple pressure plates 202 at intervals along the circumference. One end of the pressure plate 202 is hinged to the adjusting ring 201, and the other end of the pressure plate 202 is hinged to one side of the moving component 3. The pull ring assembly 203 includes a pull block 2031, a pull buckle 2032, a pull rod 2033, a card block 2034 and a spring 2035. The pull block 2031 is fixedly connected to the adjusting ring 201, and a first slide groove 2036 is provided in the pull block 2031. The pull rod 2033 Located in the first slide groove 2036 and slidingly connected to the first slide groove 2036, one end of the pull rod 2033 is fixed with the pull buckle 2032, and the other end of the pull rod 2033 is fixed with the clamping block 2034. The pull rod 2033 is outer-mounted with the spring 2035, one end of the spring 2035 abuts against the pull block 2031, and the other end of the spring 2035 abuts against the clamping block 2034. The adjusting ring 201 has a through hole corresponding to the clamping block 2034 one by one, and the outer wall of the probe 1 is provided with a plurality of clamping grooves 101 at intervals along its length direction. The clamping block 2034 passes through the through hole and is clamped with the clamping groove 101.

[0051] According to the set wellbore diameter, the pull ring assembly 203 is moved to make the adjustment ring 201 move along the length direction of the probe 1, thereby driving the pressure plate 202 to squeeze the moving assembly 3 along the width direction of the wellbore until the diameter enclosed by the moving assembly 3 is the same as the wellbore diameter.

[0052] When the position of the adjustment ring 201 needs to be moved, the staff pulls the pull button 2032 outward, and the pull rod 2033 is pulled outward along the first slide groove 2036. At this time, the pull button 2032 exerts an outward force on the spring 2035, causing the spring 2035 to be in a compressed state, so that the clamping block 2034 can be pulled out of the clamping slot 101, making it easier to select a clamping slot 101 in another position for clamping;

[0053] When the position to be moved of the adjustment ring 201 is determined, the staff pushes the pull buckle 2032 inward, and the pull buckle 2032 is pushed inward along the first sliding groove 2036. At this time, the pull buckle 2032 exerts an inward force on the spring 2035, and the clamping block 2034 moves inward under the action of the elastic force, so that the clamping block 2034 is clamped into the selected clamping slot 101.

[0054] Specifically, such as Figure 6As shown, three slots 101 are spaced apart along the length of the probe tube 1. The slots 101 and the through-hole have the same dimensions. A different number of slots 101 can be provided based on actual needs, allowing the clamping block 2034 to engage with slots 101 at different heights. This allows multiple movable assemblies 3 to form circles of varying diameters, accommodating wellbore diameters and improving the device's applicability.

[0055] In this embodiment, the block 2034 is cylindrical, the slot 101 is a circular slot, and the through hole is a circular through hole. The block 2034 can also be set to a different shape, such as a cube or a cuboid, according to actual conditions.

[0056] Specifically, the adjustment ring 201 is provided with three pressure plates 202 spaced apart along the circumferential direction.

[0057] The pressing plate 202 is arranged to be inclined.

[0058] Specifically, the first sliding groove 2036 in the pulling block 2031 has an annular protrusion, and one end of the spring 2035 abuts against the protrusion.

[0059] On the basis of the above scheme, it also includes a support component 8, which is located between the adjustment component 2 and the protection component 5. There are multiple support components 8, and the multiple support components 8 are arranged in a one-to-one correspondence with the multiple moving components 3. The support component 8 includes a support shell 801 and a slide rod 802. The support shell 801 is arranged in a one-to-one correspondence with the moving component 3. One end of the support shell 801 is fixedly connected to the probe 1, and the slide rod 802 is located in the support shell 801. One end of the slide rod 802 is slidably connected to the support shell 801, and the other end of the slide rod 802 is fixedly connected to the corresponding moving component 3.

[0060] The movement of the moving assembly 3 along the width direction of the wellbore drives the movement of the sliding rod 802 , and the sliding rod 802 guides the movement of the moving assembly 3 .

[0061] Specifically, such as Figure 2 As shown, there are three supporting shells 801 , and the three supporting shells 801 are arranged at intervals along the axial direction of the probe tube 1 .

[0062] The length of the support shell 801 along the width direction of the wellbore is equal to the distance between the moving component 3 and the probe 1 .

[0063] On the basis of the above scheme, the moving component 3 includes a moving plate 301, a first roller component 302 and a second roller component 303. There are multiple moving plates 301, and the multiple moving plates 301 are arranged in a one-to-one correspondence with the multiple support shells 801. The upper part of one side of the moving plate 301 is hinged to the corresponding pressure plate 202, and the middle part of one side of the moving plate 301 is fixedly connected to the other end of the slide rod 802. The moving plate 301 has a first groove 304, and the linkage component 4 is located in the first groove 304. One end of the linkage component 4 is rotatably connected to the inner wall of the first groove 304, and the other end of the linkage component 4 is transmission-connected to the second roller component 303.

[0064] As adjustment ring 201 descends along the length of probe tube 1 toward the depth of the wellbore, pressure plate 202 presses movable plate 301 outward, causing it to move to a predetermined position along the width of the wellbore. The rotation of linkage assembly 4 drives the rotation of second roller assembly 303, which in turn drives movable plate 301 and first roller assembly 302 to move steadily along the inner wall of the wellbore, improving the detection performance of probe tube 1.

[0065] Specifically, such as Figure 1 As shown, the movable plate 301 is a rectangular plate, and the length of the movable plate 301 along the length of the wellbore is equal to the length of the probe 1 along the length of the wellbore, so that the movable plate 301 can protect the probe 1 and prevent the debris in the wellbore from damaging the probe 1.

[0066] Specifically, the first groove 304 is provided along the length direction of the movable plate 301 .

[0067] Specifically, the first roller assembly 302 includes a first shaft and two first rollers, wherein the first shaft is fixedly connected to the other end of the movable plate 301 and the two first rollers are rotatably connected to the first shaft. The first roller assembly 302 and the second roller assembly 303 have the same structure.

[0068] On the basis of the above scheme, the second roller assembly 303 includes a second rotating shaft 3031, two second rollers 3032 and a first tooth 3033. The second rotating shaft 3031 is fixedly connected to one end of the movable plate 301, and the two second rollers 3032 are respectively rotatably connected to the two ends of the second rotating shaft 3031. The two second rollers 3032 are provided with the first tooth 3033 at the facing ends. The first tooth 3033 is transmission-connected to the linkage assembly 4.

[0069] The rotation of the linkage assembly 4 drives the rotation of the two second rollers 3032 on the second rotating shaft 3031 through the first teeth 3033 .

[0070] Specifically, the first teeth 3033 are arranged at intervals along the inner circumferential direction of the second roller 3032 .

[0071] On the basis of the above scheme, the linkage assembly 4 includes a rotating rod 401, a connecting rod 402, a second tooth 403, a second gear 404, a third gear 405 and a fourth gear 406. One end of the rotating rod 401 passes through the first groove 304 and is fixed with the fourth gear 406. The fourth gear 406 is respectively engaged with the first tooth 3033 for transmission. The other end of the rotating rod 401 is rotatably connected to the other end of the first groove 304. The upper part of the rotating rod 401 is fixed with the second teeth 403 at intervals along the circumferential direction. The connecting rod 402 and the rotating rod 401 are rotatably connected. The second gear 404 is fixedly connected to one end of the connecting rod 402. The second tooth 403 is engaged with one end of the second gear 404 for transmission. The other end of the connecting rod 402 rotates out of the first groove 304 and is fixedly connected to the third gear 405. The third gear 405 is transmission connected to the protective assembly 5.

[0072] The rotation of the protective assembly 5 drives the third gear 405, which in turn drives the second gear 404 via the connecting rod 402. The rotation of the second gear 404 drives the second teeth 403, which in turn drives the rotating rod 401. The rotation of the rotating rod 401 drives the two second rollers 3032 via the fourth gear 406 and the first teeth 3033.

[0073] Specifically, the second gear 404 may be a conical gear.

[0074] Among them, such as Figure 3 As shown, the second gear 404 is located in the first groove 304 .

[0075] Specifically, the other end of the connecting rod 402 rotates through one side of the first groove 304 and is rotationally connected to the third gear 405 .

[0076] A plurality of second teeth 403 are fixed to the upper portion of the rotating rod 401 at intervals along the circumferential direction.

[0077] Specifically, the third gear 405 is a spur gear, and can always be engaged with the positioning ring 505 of the protective component 5 when the moving component 3 is fine-tuned and moved radially outward.

[0078] On the basis of the above scheme, the protective assembly 5 includes a protective ring 501, a fixed ring 502, a rotating ring 503, a third tooth 504, a positioning ring 505 and a fourth tooth 506. The lower part of the probe 1 is fixedly sleeved with the fixed ring 502, and the fixed ring 502 has a second slide groove 507. The lower part of the rotating ring 503 is located in the second slide groove 507 and is rotatably connected to the fixed ring 502. The upper part of the rotating ring 503 is fixed with the protective ring 501, and the top of the rotating ring 503 is fixed with the third tooth 504 at intervals along the circumferential direction. The third tooth 504 is transmission-connected to the driving assembly 6. The outer upper part of the protective ring 501 is sleeved with the positioning ring 505, and the fourth tooth 506 is fixed with the circumferential spaced on the positioning ring 505. The fourth tooth 506 is meshed with the third gear 405 for transmission.

[0079] The driving assembly 6 drives the third tooth 504 to rotate, thereby driving the rotating ring 503 to rotate in the second sliding groove 507. The rotation of the rotating ring 503 drives the protective ring 501 to rotate, thereby driving the positioning ring 505 to rotate. The fourth tooth 506 on the positioning ring 505 rotates and drives the third gear 405 to rotate.

[0080] Specifically, such as Figure 7 As shown, a circular ring is fixed on the top of the rotating ring 503 , the circular ring is sleeved outside the probe 1 , and a plurality of third teeth 504 are fixed on the outer side of the circular ring at intervals along the circumferential direction.

[0081] Based on the above scheme, the driving assembly 6 includes a fixed frame 601, a motor 602 and a fifth gear 603. One end of the fixed frame 601 is fixedly connected to the upper part of the probe 1, and the other end of the fixed frame 601 is fixedly connected to the motor 602. The output shaft of the motor 602 is fixedly connected to the fifth gear 603, and the fifth gear 603 and the third tooth 504 are engaged for transmission.

[0082] The motor 602 drives the fifth gear 603 to rotate. The rotation of the fifth gear 603 drives the third tooth 504 to rotate, thereby driving the rotating ring 503 to rotate.

[0083] Specifically, the driving end of the driving assembly 6 is the rotating shaft of the motor 602 .

[0084] Among them, such as Figure 6 As shown, the fixing frame 601 is an L-shaped frame. The fixing frame 601 is located above the adjustment ring 201 and is fixedly connected to the probe 1.

[0085] On the basis of the above scheme, it also includes a dustproof component 7, which includes a support rod 701, a fixed block 702, a rubber block 703 and a fan blade 704. There are multiple support rods 701, and the multiple support rods 701 are arranged axially at intervals along the fixed block 702. One end of the fixed block 702 is fixedly connected to one end of the support rod 701 along the circumferential direction, and the other end of the support rod 701 is fixedly connected to the other end of the protective ring 501. The other end of the fixed block 702 is fixed with the rubber block 703, and the rubber block 703 is fixed with multiple fan blades 704 along the circumferential direction.

[0086] The rotation of the protective ring 501 can drive the rotation of the fixed block 702, the rubber block 703 and the fan blades 704 through the support rod 701. The rotation of the multiple fan blades 704 can generate rising wind force to prevent dust in the wellbore from sticking to the surface of the probe 1.

[0087] Specifically, such as Figure 6 As shown, there are four support rods 701, which are arranged at intervals along the circumference of the fixing block 702. A plurality of blades 704 are fixed to the rubber block 703 at intervals along the circumference.

[0088] The rubber block 703 can also prevent the probe 1 from colliding with the inner wall of the wellbore.

[0089] Specifically, it also includes a cable winch. After the diameter formed by the movable component 3 is the same as the wellbore diameter, the end of the probe 1 away from the dustproof component 7 is connected to the cable of the cable winch, and then the device can be placed in the wellbore.

[0090] This embodiment also provides a method for detecting cracks in oil and gas reservoirs, comprising the following steps:

[0091] Step 1: A wellbore is opened in the oil and gas field. According to the diameter of the wellbore, the movable component 3 is adjusted by the adjusting component 2 until the diameter formed by the movable component 3 is the same as the diameter of the wellbore. Then, the oil and gas reservoir fracture detection device is placed in the wellbore by a cable winch;

[0092] Step 2: The driving end of the driving component 6 drives the protection component 5 to rotate along the circumference of the probe 1, and the rotation of the protection component 5 drives the linkage component 4 to rotate;

[0093] Step 3: The rotation of the linkage assembly 4 drives the moving assembly 3 to move stably along the length direction of the inner wall of the wellbore, thereby driving the probe 1 to move stably along the length direction of the inner wall of the wellbore. After the probe 1 moves to a suitable position, the probe 1 can detect cracks in the oil and gas reservoir.

[0094] The beneficial effect of adopting this further solution is as follows: after the adjustment assembly 2 is moved along the length of the probe tube 1 so that the diameter formed by the movable assembly 3 is the same as the wellbore diameter, the oil and gas reservoir fracture detection device is placed in the wellbore via a cable winch. Subsequently, the driving end of the drive assembly 6 drives the protective assembly 5 to rotate circumferentially along the probe tube 1, thereby driving the linkage assembly 4 to rotate. The kinetic energy generated by the rotation of the linkage assembly 4 drives the probe tube 1 to move steadily downward along the length of the wellbore inner wall, thereby improving the detection performance of the probe tube 1.

[0095] When the probe tube 1 is lowered to a suitable position, it can detect cracks in the oil and gas reservoir. After the detection is completed, the probe tube 1 can be pulled upward by a cable winch. Subsequently, the driving end of the drive assembly 6 drives the protective assembly 5 in the reverse direction along the circumference of the probe tube 1, thereby driving the linkage assembly 4 in the reverse direction. The kinetic energy generated by the reverse rotation of the linkage assembly 4 drives the probe tube 1 to move upward and stably along the length of the wellbore inner wall, returning to the initial position, facilitating the detection of oil and gas reservoir cracks in the next wellbore.

[0096] Specifically, step one also includes a cable winch. After the diameter formed by the movable component 3 is the same as the wellbore diameter, the end of the probe 1 away from the dustproof component 7 is connected to the cable of the cable winch, and then the device can be placed in the wellbore.

[0097] Specifically, when in use, first, the cable of the cable winch is fixedly connected to the end of the probe 1, and then according to the set wellbore diameter, the staff pulls the buckle 2032 outward, and the pull rod 2033 is pulled outward along the first slide groove 2036, and the buckle 2032 exerts an outward force on the spring 2035, so that the spring 2035 is in a compressed state, and the block 2034 is pulled out of the slot 101; during the adjustment process of the block 2034, the position of the adjustment ring 201 is adjusted. When the adjustment ring 201 moves along the probe, 1 descends toward the depth of the well, the pressing plate 202 presses the movable plate 301 outward, causing the movable plate 301 to move to a predetermined position along the width direction of the wellbore; after determining the position of the clamping block 2034 to be adjusted, the staff pushes the pull button 2032 inward. The pull button 2032 is pushed inward along the first sliding groove 2036, and the pull button 2032 exerts an inward force on the spring 2035. The clamping block 2034 moves inward under the action of the elastic force and is locked into the selected clamping slot 101.

[0098] Secondly, the motor 602 drives the fifth gear 603 to rotate, and the rotation of the fifth gear 603 drives the third tooth 504 to rotate, thereby driving the rotation of the rotating ring 503. The rotation of the rotating ring 503 drives the protective ring 501 to rotate, thereby driving the positioning ring 505 to rotate. The fourth tooth 506 on the positioning ring 505 rotates and drives the third gear 405 to rotate. The rotation of the third gear 405 drives the rotation of the second gear 404 through the connecting rod 402. The rotation of the second gear 404 drives the rotation of the second tooth 403, thereby driving the rotation of the rotating rod 401. The rotation of the rotating rod 401 drives the rotation of the two second rollers 3032 through the fourth gear 406 and the first tooth 3033, so that the two second rollers 3032 drive the probe 1 to move stably downward along the length direction of the inner wall of the wellbore, thereby improving the detection performance of the probe 1.

[0099] Finally, when the probe 1 is lowered to a suitable position, the probe 1 can detect cracks in the oil and gas reservoir. After the detection is completed, the probe 1 can be pulled upward by a cable winch to complete the detection of cracks in the oil and gas reservoir.

[0100] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0101] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0102] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0103] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0104] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0105] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for detecting cracks in oil and gas reservoirs, characterized in that: It includes a probe tube, an adjustment component, a moving component, a linkage component, a protective component and a drive component. The upper part of the probe tube is sleeved with the adjustment component, the lower part of the probe tube is rotatably connected to the protective component, there are multiple moving components, and the multiple moving components are arranged at intervals along the circumference of the adjustment component. The adjustment component is hinged to one side of the moving component, the drive component is fixed on the probe tube, the driving end of the drive component is transmission-connected to one end of the protective component, one side of the protective component is transmission-connected to the linkage component, the linkage component is located on the inner side of the moving component and is transmission-connected to the moving component; The moving assembly includes a moving plate, a first roller assembly and a second roller assembly. The moving plate has a first groove, the linkage assembly is located in the first groove, one end of the linkage assembly is rotatably connected to the inner wall of the first groove, and the other end of the linkage assembly is transmission-connected to the second roller assembly; The linkage assembly includes a rotating rod, a connecting rod, a second tooth, a second gear, a third gear and a fourth gear, one end of the rotating rod passes through one end of the first groove and is fixed with the fourth gear, the fourth gear is transmission-connected to the second roller assembly, the other end of the rotating rod is rotationally connected to the other end of the first groove, the upper part of the rotating rod is fixed with the second teeth at intervals along the circumference, the connecting rod and the rotating rod are rotationally connected, the second gear is fixedly connected to one end of the connecting rod, the second tooth is meshed with the second gear for transmission, the other end of the connecting rod rotates out of the first groove and is fixedly connected to the third gear, and the third gear is transmission-connected to the guard assembly; The protective assembly includes a protective ring, a fixed ring, a rotating ring, a third tooth, a positioning ring and a fourth tooth. The fixed ring is provided on the lower fixed sleeve of the probe tube, and a second slide groove is provided in the fixed ring. The lower part of the rotating ring is located in the second slide groove and is rotatably connected to the fixed ring. The protective ring is fixed on the upper part of the rotating ring, and the third teeth are fixed on the top of the rotating ring at intervals in the circumferential direction. The third teeth are transmission-connected to the driving assembly. The positioning ring is provided on the outer upper part of the protective ring, and the fourth teeth are fixed on the positioning ring at intervals in the circumferential direction. The fourth teeth are meshed with the third gear for transmission.

2. The oil and gas reservoir crack detection device according to claim 1, characterized in that: The adjusting assembly comprises an adjusting ring, a pressure plate and a pull ring assembly, the upper sleeve of the probe tube is sleeved with the adjusting ring, and the adjusting ring is provided with a plurality of pressure plates at intervals along the circumference, one end of the pressure plate is hinged to the adjusting ring, and the other end of the pressure plate is hinged to one side of the moving assembly, and the pull ring assembly comprises a pull block, a pull buckle, a pull rod, a card block and a spring, the pull block is fixedly connected to the adjusting ring, the pull block has a first slide groove, the pull rod is located in the first slide groove and is slidably connected to the first slide groove, one end of the pull rod is fixed with the pull buckle, the other end of the pull rod is fixed with the card block, the pull rod outer sleeve is provided with the spring, one end of the spring abuts against the pull block, and the other end of the spring abuts against the card block, the adjusting ring has a through hole corresponding to the card block, and the outer wall of the probe tube is provided with a plurality of card slots at intervals along the length direction, and the card block passes through the through hole and is engaged with the card slot.

3. The oil and gas reservoir crack detection device according to claim 2, characterized in that: It also includes a support assembly, which is located between the adjustment assembly and the protection assembly. There are multiple support assemblies, and the multiple support assemblies are arranged in a one-to-one correspondence with the multiple moving assemblies. The support assembly includes a support shell and a sliding rod. One end of the support shell is fixedly connected to the probe, one end of the sliding rod is slidably connected to the support shell, and the other end of the sliding rod is fixedly connected to the corresponding moving assembly.

4. The oil and gas reservoir crack detection device according to claim 3, characterized in that: There are multiple movable plates, and the multiple movable plates are arranged in a one-to-one correspondence with the multiple supporting components. The upper part of one side of the movable plate is hinged to the corresponding pressure plate, and the middle part of one side of the movable plate is fixedly connected to the other end of the sliding rod.

5. The oil and gas reservoir crack detection device according to claim 1, characterized in that: The driving assembly includes a fixed frame, a motor and a fifth gear. One end of the fixed frame is fixedly connected to the upper part of the probe tube, and the other end of the fixed frame is fixedly connected to the motor. The output shaft of the motor is fixedly connected to the fifth gear, and the fifth gear and the third gear are engaged for transmission.

6. The oil and gas reservoir crack detection device according to claim 1, characterized in that: It also includes a dustproof component, which includes a support rod, a fixed block, a rubber block and a fan blade. There are multiple support rods, and the multiple support rods are arranged axially at intervals along the fixed block. One end of the fixed block is fixedly connected to one end of the support rod, and the other end of the support rod is fixedly connected to the other end of the protective ring. The rubber block is fixed to the other end of the fixed block, and the rubber block is fixed with multiple fan blades at circumferential intervals.

7. A method for detecting cracks in oil and gas reservoirs, using the oil and gas reservoir crack detection device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Open a wellbore in the oil and gas field, adjust the movable assembly by adjusting the assembly according to the wellbore diameter until the diameter formed by the movable assembly is the same as the wellbore diameter, and then place the oil and gas reservoir fracture detection device in the wellbore by a cable winch; Step 2: The driving end of the driving assembly drives the protection assembly to rotate along the circumference of the probe tube, and the rotation of the protection assembly drives the linkage assembly to rotate; Step 3: The rotation of the linkage assembly drives the moving assembly to move stably along the length direction of the wellbore inner wall, thereby driving the probe to move stably along the length direction of the wellbore. After the probe moves to the target position, the probe detects cracks in the oil and gas reservoir.

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