Oil and gas reservoir crack detection device and detection method thereof

Abstract

The invention relates to an oil and gas reservoir crack detection device and a detection method thereof, and belongs to the technical field of oil and gas reservoir crack detection.The oil and gas reservoir crack detection device comprises an exploring tube, an adjusting assembly, a moving assembly, a linkage assembly, a protection assembly and a driving assembly.The upper portion of the exploring tube is sleeved with the adjusting assembly, and the lower portion of the exploring tube is rotationally connected with the protection assembly; the multiple moving assemblies are arranged in the circumferential direction of the adjusting assembly at intervals, the adjusting assembly is hinged to one side of each moving assembly, the driving assembly is fixed to the exploring tube, the driving end of the driving assembly is in transmission connection with one end of the protection assembly, and the other end of the protection assembly is in transmission connection with the exploring tube. One side of the protection assembly is in transmission connection with the linkage assembly, the linkage assembly is located on the inner side of the moving assembly and is in transmission connection with the moving assembly, and the purpose is to guarantee that the exploring tube stably moves in a well hole.

Description

Technical Field

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

[0002] Detection of oil and gas reservoir fractures is crucial for evaluating the production capacity of reservoirs and guiding the development strategy of oil and gas fields. Cracks can significantly increase the permeability of reservoirs 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. In the detection of oil and gas reservoir fractures, the main purpose of sonic logging is to identify the existence and characteristics of fractures by measuring the sonic velocity of the formation. Sonic logging can provide information about the elastic parameters of the formation, which are related to the density, aspect ratio, inclination and filling of the fracture. By analyzing the data obtained from sonic logging, the effectiveness of the fracture can be quantitatively evaluated.

[0003] The existing technology allows the probe and cable of the sonic logging instrument to be lowered into a hole drilled in advance and ensure that they are 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 cable winch continuously lowering the cable and relying on the downward force, and it cannot descend steadily and gradually. When the cable winch releases the cable too quickly, the probe may directly reach the bottom of the hole and be broken, 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 in the wellbore.

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

[0007] The beneficial effect of the present invention is that the staff adjusts the moving assembly through the adjustment assembly until the diameter formed by the moving assembly is the same as the diameter of the wellbore. Subsequently, the cable of the cable winch is fixedly connected to the end of the moving assembly to guide the moving assembly during movement. The driving assembly drives the rotation of the protection assembly, thereby driving the rotation of the linkage assembly. The rotation of the linkage assembly drives the moving assembly to move along the length direction of the wellbore, thereby driving the probe to move stably along the length direction of the wellbore, thereby improving the detection performance of the probe.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Further, the adjusting assembly includes an adjusting ring, a pressure plate and a pull ring assembly, the upper part 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 circumferential direction, 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 includes a pull block, a pull buckle, a pull rod, a clamping 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, the pull buckle is fixed to one end of the pull rod, and the clamping block is fixed to the other end of the pull rod, 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 clamping block, the adjusting ring has through holes corresponding to the clamping blocks one by one, and the outer wall of the probe tube is provided with a plurality of clamping grooves at intervals along the length direction, and the clamping block passes through the through hole and is clamped with the clamping groove.

[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, thereby driving the pressure plate to squeeze the moving assembly along the wellbore width direction until the diameter surrounded by the moving assembly is the same as the wellbore diameter.

[0011] When the position of the adjustment ring needs to be moved, the staff 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 so that the card block can be pulled out of the card slot, making it easier to select a card slot at another position for card connection;

[0012] When the position to be moved of the adjusting ring is determined, the staff pushes the buckle inward, and the buckle is pushed to move inward along the first slide slot. At this time, the buckle exerts an inward force on the spring, and the card block moves inward under the elastic force, so that the card block is inserted into the selected card slot.

[0013] Furthermore, it also includes a support component, which is located between the adjustment component and the protection component. There are multiple support components, and the multiple support components are arranged in a one-to-one correspondence with the multiple moving components. The support component 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 component.

[0014] The beneficial effect of adopting the above further solution is that the movement of the moving assembly along the width direction of the wellbore drives the movement of the sliding rod, and the sliding rod guides the movement of the moving 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 adopting the above further scheme is that when the adjustment ring descends to the depth of the deep well along the length direction of the probe tube, the pressure plate presses the movable plate outward, so that the movable plate moves to a predetermined position along the width direction of the wellbore. The rotation of the linkage assembly can drive the rotation of the second roller assembly, thereby driving 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 rotatably connected to the two ends of the second rotating shaft respectively, the two second rollers have the first teeth at the ends facing each other, and 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] Further, 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 gears are respectively meshed 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 second teeth are fixed at circumferential intervals on the upper part of the rotating rod. 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 meshed 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. 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 third gear of the protection component drives the rotation of the second gear through 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 through 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 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 along 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 along the circumferential direction, and the fourth teeth are meshed with the third gear for transmission.

[0022] The beneficial effect of adopting the above further solution is that the driving 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, and the rotation of the fourth tooth on the positioning ring drives the third gear to rotate.

[0023] Furthermore, 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, 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 is meshed with the third gear for transmission.

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

[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 intervals along the circumferential direction.

[0026] The beneficial effect of adopting the above further scheme is that the rotation of the protective ring can drive the rotation of the fixed block, the rubber block and the fan blades through the support rod, and 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 component is adjusted by the adjusting component according to the diameter of the wellbore until the diameter surrounded by the movable component is the same as the diameter of the wellbore, 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 component drives the protection component to rotate along the circumference of the probe tube, and the rotation of the protection component drives the linkage component to rotate;

[0030] Step three: 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 component is moved along the length direction of the probe tube and the diameter formed by the moving component is made the same as the diameter of the wellbore, the device is placed in the wellbore through a cable winch. Subsequently, the driving end of the driving component drives the protection component to rotate along the circumference of the probe tube, thereby driving the linkage component to rotate. The kinetic energy generated by the rotation of the linkage component drives the probe tube to move downward stably along the length direction of the inner wall of the wellbore, thereby improving the detection performance of the probe tube.

[0032] When the probe tube is lowered to a suitable position, the probe tube can detect cracks in the oil and gas reservoir. After the detection is completed, the probe tube can be pulled upward by a cable winch. Subsequently, the driving end of the driving component reversely drives the protection component to rotate in the reverse direction along the circumference of the probe tube, thereby driving the linkage component to rotate in the reverse direction. The kinetic energy generated by the reverse rotation of the linkage component drives the probe tube to move upward stably along the length direction of the inner wall of the wellbore, thereby improving the detection performance of the probe tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a structural schematic diagram 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 fracture 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 schematic diagram of the linkage assembly of the present invention;

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

[0039] Figure 7 It is a schematic structural 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 listed as follows:

[0042] 1. probe tube; 101. card slot; 2. adjustment assembly; 201. adjustment ring; 202. pressure plate; 203. pull ring assembly; 2031. pull block; 2032. pull buckle; 2033. pull rod; 2034. card block; 2035. spring; 2036. first slide slot; 3. moving assembly; 301. moving plate; 302. first roller assembly; 303. second roller assembly; 3031. second rotating 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, protection assembly; 501, protection ring; 502, fixed ring; 503, rotating ring; 504, third tooth; 505, positioning ring; 506, fourth tooth; 507, second slide groove; 6, drive assembly; 601, fixed frame; 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 in conjunction with 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 Figure 1-Figure 8As shown, this embodiment provides an oil and gas reservoir crack detection device, including a probe tube 1, an adjusting component 2, a moving component 3, a linkage component 4, a protective component 5 and a driving component 6. The upper part of the probe tube 1 is sleeved with the adjusting component 2, and the lower part of the probe tube 1 is rotatably connected with the protective component 5. There are multiple moving components 3, and the multiple moving components 3 are arranged at intervals along the circumference of the adjusting component 2. The adjusting component 2 is hinged to one side of the moving component 3. The driving component 6 is fixed on the probe tube 1, and the driving end of the driving component 6 is transmission-connected to one end of the protective component 5, and one side of the protective 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 staff adjusts the moving assembly 3 through the adjustment assembly until the diameter formed by the moving assembly 3 is the same as the diameter of the wellbore. Subsequently, the cable of the cable winch is fixedly connected to the end of the moving assembly 3 to guide the moving assembly 3 during the movement. The driving assembly 6 drives the rotation of the protection assembly 5, thereby driving the rotation of the linkage assembly 4. The rotation of the linkage assembly 4 drives the moving assembly 3 to move along the length direction of the wellbore, thereby driving the probe 1 to move stably along the length direction of the wellbore, thereby 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 adjusting component 2, and the lower outer wall of the probe tube 1 is rotatably connected with a protective component 5.

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

[0049] In practical applications, the diameter surrounded by the multiple moving components 3 will be slightly smaller than the wellbore diameter.

[0050] On the basis of the above scheme, the adjustment component 2 includes an adjustment ring 201, a pressure plate 202 and a pull ring assembly 203. The upper part of the probe 1 is sleeved with the adjustment ring 201, and the adjustment ring 201 is provided with multiple pressure plates 202 at intervals along the circumferential direction. One end of the pressure plate 202 is hinged to the adjustment 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 clamping block 2034 and a spring 2035. The pull block 2031 is fixedly connected to the adjustment 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 slidably connected with the first slide groove 2036, the pull buckle 2032 is fixed to one end of the pull rod 2033, and the block 2034 is fixed to the other end of the pull rod 2033. The pull rod 2033 is outerly provided 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 block 2034. The adjusting ring 201 has through holes corresponding to the blocks 2034 one by one, and the outer wall of the probe 1 is provided with a plurality of slots 101 at intervals along its length direction, and the block 2034 passes through the through holes and is engaged with the slots 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 wellbore width direction until the diameter surrounded 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 buckle 2032 outward, and the pull rod 2033 is pulled outward along the first slide groove 2036. At this time, the buckle 2032 exerts an outward force on the spring 2035, so that the spring 2035 is in a compressed state, so that the block 2034 can be pulled out of the slot 101, so as to select the slot 101 at other positions for engagement;

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

[0054] Specifically, Figure 6As shown, three slots 101 are arranged at intervals along the length direction of the probe tube 1. The slots 101 have the same size as the through hole. Different numbers of slots 101 can be arranged according to actual needs, so that the block 2034 can be engaged with the slots 101 at different heights, so that the multiple moving components 3 can form circles of different diameters to adapt to wells of different diameters, thereby improving the applicability of the device.

[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 different shapes, such as a cube or a cuboid, according to actual conditions.

[0056] Specifically, the adjustment ring 201 is provided with three pressure plates 202 at intervals 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, Figure 2 As shown, there are three support shells 801 , and the three support 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 supporting 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 sliding 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 assembly 303.

[0064] When the adjusting ring 201 descends toward the depth of the deep well along the length direction of the probe 1, the pressing plate 202 presses the moving plate 301 outward, so that the moving plate 301 moves to a predetermined position along the width direction of the wellbore. The rotation of the linkage assembly 4 can drive the rotation of the second roller assembly 303, thereby driving the moving plate 301 and the first roller assembly 302 to move stably along the inner wall of the wellbore, thereby improving the detection performance of the probe 1.

[0065] Specifically, Figure 1 As shown, the movable plate 301 is a rectangular plate, and the length of the movable plate 301 along the length direction of the wellbore is equal to the length of the probe 1 along the length direction 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 arranged along the length direction of the movable plate 301 .

[0067] Specifically, the first roller assembly 302 includes a first rotating shaft and two first rollers, wherein the first rotating shaft is fixedly connected to the other end of the moving plate 301, and the two first rollers are rotatably connected to the first rotating 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, the two second rollers 3032 are rotatably connected to the two ends of the second rotating shaft 3031 respectively, and the first tooth 3033 is provided at the opposite ends of the two second rollers 3032, and the first tooth 3033 is transmission-connected to the linkage assembly 4.

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

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

[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 meshed 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 tooth 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 meshed 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 protection component 5 drives the third gear 405 to rotate, and then drives the second gear 404 to rotate through the connecting rod 402. The rotation of the second gear 404 drives the second teeth 403 to rotate, and then drives the rotation of the rotating rod 401. The rotation of the rotating rod 401 drives the two second rollers 3032 to rotate through the fourth gear 406 and the first teeth 3033.

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

[0074] Among them, 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 at intervals along the circumferential direction on the upper portion of the rotating rod 401 .

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

[0078] On the basis of the above scheme, the protection component 5 includes a protection 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 protection 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 component 6. The positioning ring 505 is sleeved on the outer upper part of the protection ring 501, and the fourth tooth 506 is fixed with the circumferentially spaced upper part of 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 slide slot 507. The rotation of the rotating ring 503 drives the protective ring 501 to rotate, thereby driving the positioning ring 505 to rotate, and the fourth tooth 506 on the positioning ring 505 rotates to drive the third gear 405 to rotate.

[0080] Specifically, 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 tube 1, and a plurality of third teeth 504 are fixed at intervals along the circumferential direction on the outer side of the circular ring.

[0081] On the basis of 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, 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 meshed 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, Figure 6 As shown, the fixing frame 601 is an L-shaped frame. The fixing frame 601 is located above the adjusting 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. The support rod 701 is multiple, 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 a circumferential interval, 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 a circumferential interval.

[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 plurality of fan blades 704 can generate rising wind force to prevent dust in the wellbore from adhering to the surface of the probe 1.

[0087] Specifically, Figure 6 As shown, there are four support rods 701, and the four support rods 701 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 diameter of the wellbore, 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, and the moving component 3 is adjusted by the adjusting component 2 according to the diameter of the wellbore until the diameter surrounded by the moving component 3 is the same as the diameter of the wellbore, and 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 tube 1, and the rotation of the protection component 5 drives the linkage component 4 to rotate;

[0093] Step three: The rotation of the linkage component 4 drives the moving component 3 to move stably along the length direction of the inner wall of the wellbore, and then drives 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 the above further scheme is: after the adjustment component 2 is moved along the length direction of the probe tube 1 and the diameter formed by the moving component 3 is made the same as the diameter of the wellbore, the oil and gas reservoir fracture detection device is placed in the wellbore through a cable winch. Subsequently, the driving end of the driving component 6 drives the protection component 5 to rotate along the circumference of the probe tube 1, thereby driving the linkage component 4 to rotate. The kinetic energy generated by the rotation of the linkage component 4 drives the probe tube 1 to move downward stably along the length direction of the inner wall of the wellbore, thereby improving the detection performance of the probe tube 1;

[0095] When the probe tube 1 is lowered to a suitable position, the probe tube 1 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 driving component 6 reversely drives the protection component 5 to rotate in the reverse direction along the circumference of the probe tube 1, thereby driving the linkage component 4 to rotate in the reverse direction. The kinetic energy generated by the reverse rotation of the linkage component 4 drives the probe tube 1 to move upward stably along the length direction of the inner wall of the wellbore and return to the initial position, so as to facilitate the detection of cracks in the oil and gas reservoir in the next wellbore.

[0096] Specifically, step one also includes a cable winch. After the diameter formed by the movable assembly 3 is the same as the diameter of the wellbore, the end of the probe 1 away from the dustproof assembly 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, the block 2034 drives the adjustment of the position of the adjustment ring 201. When the adjustment ring 201 moves along the probe 1 descends toward the depth of the well, the pressing plate 202 presses the moving plate 301 outward, so that the moving plate 301 moves 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 buckle 2032 inward, and the pull buckle 2032 moves inward along the first slide groove 2036 under the thrust, and 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, and the clamping block 2034 is clamped 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, and then drives the rotation of the rotating ring 503. The rotation of the rotating ring 503 drives the protective ring 501 to rotate, and then drives the positioning ring 505 to rotate. The fourth tooth 506 on the positioning ring 505 drives the third gear 405 to rotate. The rotation of the third gear 405 drives the second gear 404 to rotate through the connecting rod 402. The rotation of the second gear 404 drives the second tooth 403 to rotate, and then drives the rotation of the rotating rod 401. The rotation of the rotating rod 401 drives the two second rollers 3032 to rotate 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, 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 is necessary to understand that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0101] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0102] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0104] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0105] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary 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: The invention comprises a probe tube (1), an adjusting component (2), a moving component (3), a linkage component (4), a protection component (5) and a driving component (6); the adjusting component (2) is sleeved on the upper part of the probe tube (1); the protection component (5) is rotatably connected to the lower part of the probe tube (1); there are a plurality of moving components (3), which are arranged at intervals along the circumference of the adjusting component (2); the adjusting component (2) is hinged to one side of the moving component (3); the driving component (6) is fixed on the probe tube (1); the driving end of the driving 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).

2. The oil and gas reservoir crack detection device according to claim 1, characterized in that: The adjusting assembly (2) comprises an adjusting ring (201), a pressure plate (202) and a pull ring assembly (203); the adjusting ring (201) is sleeved on the upper part of the probe (1); the adjusting ring (201) is provided with a plurality of pressure plates (202) spaced apart along the circumferential direction; one end of the pressure plate (202) is hinged to the adjusting ring (201); the other end of the pressure plate (202) is hinged to one side of the moving assembly (3); the pull ring assembly (203) comprises a pull block (2031), a pull buckle (2032), a pull rod (2033), a clamping block (2034) and a spring (2035); the pull block (2031) is fixedly connected to the adjusting ring (201); the pull block (2031) has a first sliding groove (2036) therein; the pull rod (2033) Located in the first slide groove (2036) and slidably connected to the first slide groove (2036), one end of the pull rod (2033) is fixed with the buckle (2032), and the other end of the pull rod (2033) is fixed with the clamping block (2034), the outer sleeve of the pull rod (2033) is provided 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) is provided with through holes corresponding to the clamping blocks (2034), and the outer wall of the probe tube (1) is provided with a plurality of clamping grooves (101) at intervals along the length direction, and the clamping block (2034) passes through the through holes and is clamped with the clamping grooves (101).

3. The oil and gas reservoir crack detection device according to claim 2, characterized in that: It also includes a support assembly (8), wherein the support assembly (8) is located between the adjustment assembly (2) and the protection assembly (5), and there are multiple support assemblies (8), and the multiple support assemblies (8) are arranged in a one-to-one correspondence with the multiple moving assemblies (3). The support assembly (8) includes a support shell (801) and a sliding rod (802), one end of the support shell (801) is fixedly connected to the probe (1), one end of the sliding rod (802) is slidably connected to the support shell (801), and the other end of the sliding rod (802) is fixedly connected to the corresponding moving assembly (3).

4. The oil and gas reservoir crack detection device according to claim 3, characterized in that: The moving assembly (3) comprises a moving plate (301), a first roller assembly (302) and a second roller assembly (303); there are a plurality of moving plates (301), and the plurality of moving plates (301) are arranged in one-to-one correspondence with the plurality of supporting assemblies (8); an upper portion of one side of the moving plate (301) is hinged to the corresponding pressing plate (202); a middle portion of one side of the moving plate (301) is fixedly connected to the other end of the sliding rod (802); a first groove (304) is provided in the moving plate (301); the linkage assembly (4) is located in the first groove (304); one end of the linkage assembly (4) is rotatably connected to the inner wall of the first groove (304); and the other end of the linkage assembly (4) is transmission-connected to the second roller assembly (303).

5. The oil and gas reservoir crack detection device according to claim 4, characterized in that: The second roller assembly (303) comprises a second rotating shaft (3031), two second rollers (3032) and first teeth (3033); the second rotating shaft (3031) is fixedly connected to one end of the movable plate (301); the two second rollers (3032) are rotatably connected to two ends of the second rotating shaft (3031) respectively; the first teeth (3033) are provided at the ends facing each other of the two second rollers (3032); and the first teeth (3033) are transmission-connected to the linkage assembly (4).

6. The oil and gas reservoir crack detection device according to claim 5, characterized in that: The linkage assembly (4) comprises 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 meshed 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 rotating rod (401) is connected to the second tooth (403) and the third gear (405) is connected to the fourth gear (406); 1), the second teeth (403) are fixed at intervals along the circumferential direction on the upper part, 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 teeth (403) and the second gear (404) are meshed for transmission, the other end of the connecting rod (402) rotates to pass through the first groove (304) and is fixedly connected to the third gear (405), and the third gear (405) is transmission-connected to the protective component (5).

7. The oil and gas reservoir crack detection device according to claim 6, characterized in that: The protection assembly (5) comprises a protection 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 fixed sleeve of the probe tube (1) is provided with the fixed ring (502); 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 rotating ring The protective ring (501) is fixed on the upper part of (503), the third teeth (504) are fixed at intervals along the circumferential direction on the top of the rotating ring (503), the third teeth (504) are connected to the driving component (6) in transmission, the positioning ring (505) is sleeved on the upper outer part of the protective ring (501), the fourth teeth (506) are fixed at intervals along the circumferential direction on the positioning ring (505), and the fourth teeth (506) are meshed with the third gear (405) for transmission.

8. The oil and gas reservoir crack detection device according to claim 7, characterized in that: The driving assembly (6) comprises a fixing frame (601), a motor (602) and a fifth gear (603); one end of the fixing frame (601) is fixedly connected to the upper part of the probe tube (1); the other end of the fixing 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 meshed for transmission.

9. The oil and gas reservoir crack detection device according to claim 7, characterized in that: 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), and the other end of the support rod (701) is fixedly connected to the other end of the protective ring (501). The rubber block (703) is fixed to the other end of the fixed block (702), and the rubber block (703) is fixed with multiple fan blades (704) at intervals along the circumferential direction.

10. 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 9, characterized in that: The following steps are involved: Step 1: a wellbore is opened in the oil and gas field, and the movable component (3) is adjusted by the adjusting component (2) according to the diameter of the wellbore until the diameter formed by the movable component (3) is the same as the diameter of the wellbore, and then the oil and gas reservoir fracture detection device is placed in the wellbore by a cable winch; Step 2: The driving end of the driving component (6) drives the protection component (5) to rotate along the circumference of the probe tube (1), and the rotation of the protection component (5) drives the linkage component (4) to rotate; Step three: The rotation of the linkage component (4) drives the moving component (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 wellbore. After the probe (1) moves to a suitable position, the probe (1) detects cracks in the oil and gas reservoir.

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