A logging device for oil exploration

Abstract

The present invention relates to the field of oil exploration technology, and specifically to a logging device for oil exploration, comprising a main pressure-bearing shell, the top of which is connected to a traction joint, and further comprising: a logging shooting chamber, which is arranged at the center of the main pressure-bearing shell, the middle of which is surrounded by an annular transparent window, and an optical imaging sensor is installed inside the logging shooting chamber; an annular storage groove is symmetrically arranged at the upper and lower ends of the logging shooting chamber. The present invention fills water into an elastic water bag to expand it and tightly fit the well wall to form a seal, and the collection well section is blocked by the elastic water bags on the upper and lower sides to form a closed exploration well section, and then the mud and other turbid liquids in the closed exploration well section are emptied by a drainage delivery pump, thereby isolating and removing the turbid liquid to provide a clean and clear environment for optical imaging logging, thereby significantly improving the image quality and the accuracy of geological information.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum exploration, and in particular to a well logging device for petroleum exploration. Background Art

[0002] Well logging in oil exploration is a technology used to evaluate underground geological structures and the properties of oil reservoirs. By lowering specialized logging instruments into the well, various information about the formation can be collected. These data are crucial to determining the existence of oil reservoirs and their economic viability. Optical imaging logging is an advanced logging technology that uses high-resolution cameras and other optical sensors to capture detailed images of the well wall and formation surface. These images can provide rich geological information to help geologists and engineers better understand characteristics such as formation structure, fracture distribution, and rock texture.

[0003] However, in actual applications, it is difficult for optical imaging logging equipment to capture clear images of the well wall in an environment filled with turbid liquids such as mud. The main function of the mud in the well is to cool the drill bit, carry drill cuttings, and balance the formation pressure. However, during the optical imaging process, the mud will seriously interfere with the propagation of light, resulting in blurred images or even the inability to form an image. This greatly limits the application effect of optical imaging logging technology under complex geological conditions. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a logging device for oil exploration to solve the problem that the current optical imaging logging equipment is difficult to capture clear well wall images in an environment where the well is full of turbid liquids such as mud in actual application.

[0005] Based on the above purpose, the present invention provides a logging device for oil exploration, comprising a main pressure-bearing shell, the top of which is connected to a traction joint, and further comprising:

[0006] A well logging shooting chamber is arranged at the center of the main pressure-bearing shell, an annular transparent window is arranged around the middle of the well logging shooting chamber, and an optical imaging sensor is installed inside the well logging shooting chamber;

[0007] An annular storage groove is symmetrically arranged at the upper and lower ends of the logging and shooting chamber, and an elastic water bag is embedded and surrounded inside the annular storage groove. The elastic water bag is made of elastic material and expands uniformly as a whole when filled with liquid. The left and right sides of the elastic water bag are respectively connected to a water filling switch valve and a drainage switch valve;

[0008] A central delivery pipe is arranged at the center of the main pressure-bearing shell, the top end of the central delivery pipe is connected with a pipe joint, the bottom end of the central delivery pipe is connected with a booster delivery pump, and the booster delivery pump is connected to the elastic water bag through a water filling switch valve;

[0009] A negative pressure drainage chamber is arranged below the logging and shooting chamber, and a drainage delivery pump is installed inside the negative pressure drainage chamber. A drainage input pipe and a drainage output pipe are respectively connected to the upper and lower sides of the drainage delivery pump. The other end opening of the drainage input pipe is arranged between the symmetrically arranged annular receiving grooves, and the other end opening of the drainage output pipe is arranged below the negative pressure drainage chamber.

[0010] Furthermore, annular flushing pipes are symmetrically arranged on the upper and lower sides of the outer side of the annular transparent window, the inner end of the annular flushing pipe is connected to a flushing switch valve, the annular flushing pipe is connected to the booster delivery pump through the flushing switch valve, and the outer side of the annular flushing pipe is evenly and alternately arranged with inner flushing nozzles and outer flushing nozzles, the inner flushing nozzle is tilted toward the top of the annular transparent window, and the outer flushing nozzle is tilted toward the outer side of the annular transparent window.

[0011] Furthermore, a rotating adjustment frame is provided in the middle of the logging shooting chamber, and the rotating adjustment frame is rotatably connected to the main pressure-bearing shell, the optical imaging sensor is installed in the middle of the rotating adjustment frame, and an annular fill light is arranged around the outer side of the optical imaging sensor, and a rotating gear ring is arranged around the top of the rotating adjustment frame, and a driving gear is meshingly connected in the middle of the rotating gear ring, and a driving motor is connected to the shaft end of the driving gear, and the driving motor is fixedly connected to the main pressure-bearing shell.

[0012] Furthermore, an annular protective plate is arranged around the outer side of the well logging shooting chamber, and a lifting guide groove is vertically arranged in the middle of the inner side surface of the annular protective plate. The annular protective plate is vertically slidably connected to the main pressure-bearing shell through the lifting guide groove. When the annular protective plate slides downward, the well logging shooting chamber is completely covered inside, and when the annular protective plate slides upward, the well logging shooting chamber is exposed to the outside.

[0013] Furthermore, a lifting rack is arranged in the middle of the lifting guide groove, a lifting gear is meshingly connected to the inner side of the lifting rack, a lifting motor is connected to the shaft end of the lifting gear, and the lifting motor is fixedly connected to the main pressure-bearing shell.

[0014] Furthermore, a rotating cleaning frame is connected to the bottom of the negative pressure drainage bin, a rotating joint is connected to the top of the rotating cleaning frame, the rotating cleaning frame is rotatably connected to the main pressure-bearing shell through the rotating joint, a planetary gearbox is connected to the center of the rotating joint, a cleaning motor is connected to the top of the planetary gearbox, and the cleaning motor is fixedly connected to the main pressure-bearing shell.

[0015] Furthermore, a plurality of folding storage grooves are evenly arranged around the outer side of the rotating cleaning frame, a folding support frame is embedded and accommodated in the inner side of the folding storage groove, a folding shaft is arranged at the top end of the folding support frame, the folding support frame is rotatably connected to the rotating cleaning frame via the folding shaft, and a supporting shaft is arranged at the bottom end of the folding support frame.

[0016] Furthermore, a two-section support frame is connected below the support shaft, a cleaning brush is arranged on the outer side of the two-section support frame, the two-section support frame is rotatably connected to the folding support frame through the support shaft, an elastic support sheet is connected on the inner side of the two-section support frame, both ends of the elastic support sheet are respectively connected to the folding support frame and the two-section support frame, and the two-section support frame is supported by the elastic support sheet to maintain the same straight line with the folding support frame.

[0017] Furthermore, a central screw is vertically installed at the center of the rotating cleaning frame, a screw motor is connected to the axial end of the central screw, a connecting screw sleeve is nested and connected to the outer side of the central screw, a plurality of folding connecting rods are evenly connected and arranged around the outer side of the connecting screw sleeve, the folding connecting rods are arranged in a one-to-one correspondence with the folding support frame, the two ends of the folding connecting rods are respectively rotatably connected to the connecting screw sleeve and the folding support frame, the screw motor drives the connecting screw sleeve to move up and down through the central screw, and when the connecting screw sleeve moves up and down, all the folding support frames are driven to synchronously rotate along the folding shaft to be stored or unfolded through the folding connecting rod.

[0018] Furthermore, a supporting claw is connected to the bottom end of the two-section support frame, a supporting engaging groove is provided in the middle of the bottom end of the folding support frame, a supporting guide sleeve is vertically provided inside the two-section support frame, a supporting opening is provided at the top end of the supporting guide sleeve, a supporting connecting column is nested and slidably provided inside the supporting guide sleeve, a supporting spring is provided on the rear side of the supporting connecting column, an electromagnetic driving coil is arranged around the middle of the supporting guide sleeve, the supporting connecting column and the supporting engaging groove are cooperated with each other, and the supporting connecting column is embedded in the supporting engaging groove when extending along the supporting opening.

[0019] Beneficial effects of the present invention: As can be seen from the above description, a logging device for petroleum exploration provided by the present invention is provided with elastic water bags on both the upper and lower sides of a logging shooting chamber provided with an optical imaging sensor, and water is filled into the elastic water bags before shooting to make them expand and fit tightly against the well wall to form a seal, and the collection well section is blocked by the elastic water bags on the upper and lower sides to form a closed exploration well section, and then the mud and other turbid liquids inside the closed exploration well section are emptied by a drainage delivery pump, and the turbid liquids in a specific area of ​​the well are effectively removed, thereby isolating and removing the turbid liquids to provide a clean and clear environment for optical imaging logging, thereby significantly improving the image quality and the accuracy of geological information. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of an annular protective plate in an open state according to an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of a closed state of an annular protective plate according to an embodiment of the present invention;

[0023] Figure 3 It is a partial structural schematic diagram of the working state of an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the top partial structure of an embodiment of the present invention;

[0025] Figure 5 It is a structural schematic diagram of an annular receiving groove according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of a well logging photography chamber according to an embodiment of the present invention;

[0027] Figure 7 It is a structural schematic diagram of a rotary adjustment frame according to an embodiment of the present invention;

[0028] Figure 8 It is a structural schematic diagram of a negative pressure drainage bin according to an embodiment of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the folding support frame in the unfolded cleaning state according to an embodiment of the present invention;

[0030] Fig.10It is a structural schematic diagram of the folding support frame in the unfolded support state according to an embodiment of the present invention;

[0031] Fig.11 It is a structural schematic diagram of a rotary cleaning frame according to an embodiment of the present invention;

[0032] Fig.12 It is a schematic structural diagram of a folding support frame according to an embodiment of the present invention.

[0033] The markings in the figure are:

[0034] 1. Main pressure-bearing shell; 101. Traction joint; 102. Central delivery pipe; 103. Pipe joint; 104. Booster delivery pump; 105. Flushing switch valve; 106. Annular flushing pipe; 107. Internal flushing nozzle; 108. External flushing nozzle; 2. Well logging and shooting chamber; 201. Annular transparent window; 202. Driving gear; 203. Driving motor; 204. Rotating adjustment frame; 205. Optical imaging sensor; 206. Annular fill light; 207. Rotating gear ring; 3. Annular storage groove; 301. Elastic water bag; 302. Water filling switch valve; 303. Drainage switch valve; 4. Annular protective plate; 401. Lifting guide groove; 402. Lifting rack; 403. Lifting gear; 404. Lifting motor; 5. , negative pressure drainage chamber; 501, drainage delivery pump; 502, drainage input pipe; 503, drainage output pipe; 6, rotating cleaning frame; 601, folding storage slot; 602, rotating joint; 603, planetary gearbox; 604, cleaning motor; 7, center screw; 701, screw motor; 702, connecting screw sleeve; 703, folding connecting rod; 704, connecting rod shaft; 8, folding support frame; 801, folding shaft; 802, supporting shaft; 803, elastic support sheet; 804, two-stage support frame; 805, cleaning brush; 806, supporting claw; 9, supporting guide sleeve; 901, supporting opening; 902, electromagnetic drive coil; 903, supporting connecting column; 904, supporting spring; 905, supporting fitting groove. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a logging device for oil exploration includes a main pressure-bearing shell 1, a traction joint 101 is connected to the top of the main pressure-bearing shell 1, and also includes:

[0038] The well logging shooting chamber 2 is arranged at the center of the main pressure-bearing shell 1. An annular transparent window 201 is arranged around the middle of the well logging shooting chamber 2. An optical imaging sensor 205 is installed inside the well logging shooting chamber 2.

[0039] The annular storage groove 3 is symmetrically arranged at the upper and lower ends of the well logging and shooting chamber 2. An elastic water bag 301 is embedded and surrounded inside the annular storage groove 3. The elastic water bag 301 is made of elastic material and expands uniformly as a whole when filled with liquid. The left and right sides of the elastic water bag 301 are respectively connected to a water filling switch valve 302 and a water discharge switch valve 303;

[0040] The central delivery pipe 102 is arranged at the center of the main pressure-bearing shell 1. The top end of the central delivery pipe 102 is connected with a pipe joint 103. The bottom end of the central delivery pipe 102 is connected with a booster delivery pump 104. The booster delivery pump 104 is connected to the elastic water bag 301 through a water filling switch valve 302.

[0041] The negative pressure drainage chamber 5 is arranged below the logging and shooting chamber 2. A drainage delivery pump 501 is installed inside the negative pressure drainage chamber 5. The upper and lower sides of the drainage delivery pump 501 are respectively connected with a drainage input pipe 502 and a drainage output pipe 503. The other end opening of the drainage input pipe 502 is arranged between the symmetrically arranged annular receiving grooves 3, and the other end opening of the drainage output pipe 503 is arranged below the negative pressure drainage chamber 5.

[0042] In this embodiment, the device is mainly composed of a main pressure-bearing shell 1, which is used to protect internal components from the influence of high pressure and high temperature underground. A traction joint 101 is connected to the top of the main pressure-bearing shell 1, and a drill pipe connection structure can be connected through the traction joint 101 to facilitate lowering it into the well. The logging shooting chamber 2 is arranged at the center of the main pressure-bearing shell 1, and an annular transparent window 201 is arranged around the middle to ensure that the optical imaging sensor 205 can clearly capture the image of the well wall. A high-resolution optical imaging sensor 205 is installed inside the logging shooting chamber 2 to capture detailed images of the well wall and the formation surface. The annular receiving groove 3 is symmetrically arranged at the upper and lower ends of the logging shooting chamber 2, and an elastic water bag 301 is embedded and arranged around the inner side. The elastic water bag 301 is made of elastic material. When filled with liquid, it expands evenly as a whole and can fit tightly against the well wall to form a seal. The central delivery pipe 102 is arranged at the center of the main pressure-bearing shell 1, and a pipeline is connected to the top. The connector 103 is used to connect to the ground liquid supply system. The bottom end of the central delivery pipe 102 is connected to a booster delivery pump 104. The booster delivery pump 104 is connected to the elastic water bag 301 through a water filling switch valve 302, and is used to deliver liquid to the elastic water bag 301. The negative pressure drainage chamber 5 is arranged below the logging shooting chamber 2, and a drainage delivery pump 501 is installed inside. The upper and lower sides of the drainage delivery pump 501 are respectively connected to a drainage input pipe 502 and a drainage output pipe 503. The other end opening of the drainage input pipe 502 is arranged between the symmetrically arranged annular receiving grooves 3, and is used to extract turbid liquids such as mud in the closed exploration well section. The other end opening of the drainage output pipe 503 is arranged below the negative pressure drainage chamber 5 to discharge the extracted turbid liquid into the well below the displacement, thereby isolating and removing the turbid liquid to provide a clean and clear environment for optical imaging logging, thereby significantly improving the image quality and the accuracy of geological information.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, preferably, before imaging, the device uses a booster delivery pump 104 to deliver cleaning liquid to an annular flushing pipe 106 through a flushing switch valve 105, and an inner flushing nozzle 107 is tilted toward the top of the annular transparent window 201 to spray cleaning liquid to remove mud and sediment on the annular transparent window 201. The outer flushing nozzle 108 is tilted toward the outside of the annular transparent window 201 to spray cleaning liquid to remove mud and sediment on the well wall, thereby effectively removing mud and sediment on the annular transparent window 201 and the well wall, further ensuring a clear field of view of the optical imaging sensor 205, improving the clarity and resolution of the image, and ensuring that tiny details on the well wall and formation surface, such as cracks, holes, mineral components, etc., can be captured.

[0044] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, preferably, the rotating adjustment frame 204 of the device is installed in the middle of the logging shooting chamber 2 and is rotatably connected to the main pressure-bearing shell 1. The optical imaging sensor 205 is installed in the middle of the rotating adjustment frame 204. The outer side of the optical imaging sensor 205 is surrounded by a ring-shaped fill light 206 for providing sufficient lighting to ensure that clear images can be captured even under low light conditions. The driving motor 203 drives the rotating adjustment frame 204 to rotate through the engagement of the driving gear 202 and the rotating gear ring 207, thereby adjusting the angle of the optical imaging sensor 205 to achieve 360-degree all-round shooting of the well wall, further improving the performance of the device and ensuring the high quality and comprehensiveness of the logging image.

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, preferably, an annular protective plate 4 is arranged around the outer side of the logging shooting chamber 2 of the device, and a lifting guide groove 401 is vertically arranged in the middle of the inner side surface of the annular protective plate 4. The annular protective plate 4 is vertically slidably connected with the main pressure-bearing shell 1 through the lifting guide groove 401. The lifting motor 404 can drive the annular protective plate 4 to move up and down through the lifting gear 403 and the lifting rack 402. When the annular protective plate 4 slides downward, the logging shooting chamber 2 is completely covered inside, and when the annular protective plate 4 slides upward, the logging shooting chamber 2 is exposed to the outside. Therefore, the design of the annular protective plate 4 can completely cover the logging shooting chamber 2 when it is not working. During the lowering and lifting process of the device, the annular protective plate 4 can prevent the protrusions of the well wall from damaging the logging shooting chamber 2, thereby ensuring the safety of the equipment. After the logging shooting chamber 2 reaches the predetermined position, the driving device is started by the control system, so that the annular protective plate 4 can slide to expose the logging shooting chamber 2 to the outside for optical imaging, which is conducive to improving the flexibility and safety of the device.

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12As shown, preferably, the cleaning motor 604 of the device can drive the rotating cleaning frame 6 to rotate through the planetary gearbox 603, thereby driving the multiple folding support frames 8 connected thereto to rotate. When the rotating cleaning frame 6 is not rotating, the folding support frame 8 is affected by gravity and naturally rotates inward along the folding shaft 801 to be embedded in the folding storage groove 601 for storage. When the cleaning motor 604 drives the rotating cleaning frame 6 to rotate, it is affected by centrifugal force and the multiple folding support frames 8 are synchronously rotated outward along the folding shaft 801 to unfold. A second-stage support frame 804 is connected to the lower side of the support shaft 802, and a cleaning brush 805 is arranged on the outer side of the second-stage support frame 804. The second-stage support frame 804 is rotatably connected to the folding support frame 8 through the support shaft 802, so that the second-stage support frame 804 follows When the folding support frame 8 rotates outward and unfolds, it is blocked by the well wall and rotates downward along the support shaft 802, so that the second-section support frame 804 remains vertically attached to the well wall, so that the cleaning brush 805 on the outside can follow the rotation to brush the well wall, so as to clean the well wall before imaging. In addition, an elastic support sheet 803 is connected to the inner side of the second-section support frame 804, and the two ends of the elastic support sheet 803 are respectively connected to the folding support frame 8 and the second-section support frame 804. The second-section support frame 804 is supported by the elastic support sheet 803 to remain in the same straight line with the folding support frame 8. The elastic support sheet 803 can provide a certain pressure to improve the cleaning effect, and at the same time, it is convenient for the second-section support frame 804 to reset and follow the folding support frame 8 to be folded and stored when it stops.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, preferably, a central screw 7 is vertically installed at the center of the rotating cleaning frame 6 of the device, and a screw motor 701 is connected to the axial end of the central screw 7, and a connecting screw sleeve 702 is nested and connected on the outer side of the central screw 7, and a plurality of folding connecting rods 703 are evenly connected and connected on the outer side of the connecting screw sleeve 702, and the folding connecting rods 703 are arranged in a one-to-one correspondence with the folding support frame 8, and the two ends of the folding connecting rods 703 are rotatably connected with the connecting screw sleeve 702 and the folding support frame 8 respectively, and the screw motor 701 drives the connecting screw sleeve 702 to move up and down through the central screw 7, and when the connecting screw sleeve 702 moves up and down, all the folding support frames 8 are driven to rotate and be stored or unfolded synchronously along the folding shaft 801 through the folding connecting rod 703, thereby facilitating the adjustment of the unfolding width of the folding support frame 8, so as to adapt to exploration wells of different diameters, and it is more flexible and convenient to use.

[0048] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, preferably, the bottom end of the second-stage support frame 804 of the device is connected with a support claw 806, the middle of the bottom end of the folding support frame 8 is provided with a support fitting groove 905, the inside of the second-stage support frame 804 is vertically provided with a support guide sleeve 9, the top of the support guide sleeve 9 is provided with a support opening 901, the inner side of the support guide sleeve 9 is nested and slidably provided with a support connecting column 903, the rear side of the support connecting column 903 is provided with a support spring 904, and the middle of the support guide sleeve 9 is surrounded by an electromagnetic drive coil 902. The support connecting column 903 is moved along the support guide sleeve 9 so that when the cleaning is completed, Before imaging survey, the electromagnetic driving coil 902 controls the magnetic support connecting column 903 to extend along the support opening 901 and embed into the support engaging groove 905 to connect the two-section support frame 804 and the folding support frame 8, thereby limiting the two-section support frame 804 from rotating along the support shaft 802, thereby facilitating the formation of a stable support structure through multiple folding support frames 8, the two-section support frame 804 and the support claws 806, so that the entire device can be supported and fixed on the well wall, providing a stable platform for optical imaging logging, thereby significantly improving the image quality and the accuracy of geological information.

[0049] When in use, first connect the corresponding pipelines of the device. The top connection of the main pressure-bearing shell 1 is provided with a traction joint 101. The drill pipe connection structure can be connected through the traction joint 101 to facilitate lowering it into the well. At the same time, it is connected to the ground liquid supply system through the pipeline joint 103. Then, when the main pressure-bearing shell 1 moves downward along the exploration well, the cleaning motor 604 drives the rotating cleaning frame 6 to rotate through the planetary gearbox 603. At the same time, the screw motor 701 drives the connecting screw sleeve 702 to move through the central screw 7. When the connecting screw sleeve 702 moves, it drives all the folding support frames 8 to rotate and unfold synchronously along the folding shaft 801 through the folding connecting rod 703. When the second-stage support frame 804 rotates and unfolds outward with the folding support frame 8, it is blocked by the well wall and will move along the support The rotating shaft 802 rotates downward, so that the second-section support frame 804 remains vertically attached to the well wall, so that the cleaning brush 805 on its outer side follows the rotation to brush the well wall, so as to clean the well wall before imaging. When imaging survey is required, when the connecting screw sleeve 702 moves, the folding connecting rod 703 drives all the folding support frames 8 to rotate and retract a certain distance along the folding rotating shaft 801, so that the elastic support sheet 803 pushes the second-section support frame 804 and the folding support frame 8 to remain in the same straight line, and then the electromagnetic drive coil 902 controls the magnetic support connecting column 903 to extend along the support opening 901 and embed it into the support fitting groove 905 to connect the second-section support frame 804 and the folding support frame 8, thereby limiting the second-section support frame 804 from being able to move. It rotates along the support shaft 802, and a stable support structure is formed by multiple folding support frames 8, two-stage support frames 804 and support claws 806, so that the device is supported and fixed on the well wall as a whole. Then the lifting motor 404 drives the annular protective plate 4 to move up and down through the lifting gear 403 and the lifting rack 402. When the annular protective plate 4 slides upward, the logging shooting chamber 2 is exposed to the outside. Then the booster delivery pump 104 is connected to the elastic water bag 301 through the water filling switch valve 302 to deliver liquid to the elastic water bag 301. When the elastic water bag 301 is filled with liquid, the whole body expands evenly and can fit tightly against the well wall to form a seal. The elastic water bags 301 on the upper and lower sides are used to block the collection well section to form a closed exploration well section. The drainage in the negative pressure drainage chamber 5 The water delivery pump 501 extracts mud and other turbid liquids in the closed exploration well section through the drainage input pipe 502, and then discharges the extracted turbid liquid into the well below the displacement through the drainage output pipe 503. By isolating and removing the turbid liquid, a clean and clear environment is provided for optical imaging logging. Before imaging, the booster delivery pump 104 delivers the cleaning liquid to the annular flushing pipe 106 through the flushing switch valve 105. The internal flushing nozzle 107 sprays the cleaning liquid to remove the mud and sediment on the annular transparent window 201. The external flushing nozzle 108 sprays the cleaning liquid to remove the mud and sediment on the well wall. The annular fill light 206 provides sufficient light. The drive motor 203 drives the gear 202 and the rotating gear ring 207 to mesh.The rotating adjustment frame 204 is driven to rotate, thereby adjusting the angle of the optical imaging sensor 205 to achieve 360-degree all-round shooting of the well wall. After the shooting is completed, the drainage switch valve 303 is opened, the elastic water bag 301 contracts to empty the inside, and then the annular protective plate 4 slides down synchronously to completely cover the logging shooting chamber 2. At the same time, the screw motor 701 drives the connecting screw sleeve 702 to move through the central screw 7. When the connecting screw sleeve 702 moves, it drives all the folding support frames 8 to rotate and store synchronously along the folding shaft 801 through the folding connecting rod 703, and the reset work is completed.

[0050] The logging device for petroleum exploration provided by the present invention is provided with elastic water bags 301 on both the upper and lower sides of the logging shooting chamber 2 provided with the optical imaging sensor 205. Before shooting, water is filled into the elastic water bags 301 to make them expand and fit tightly against the well wall to form a seal. The collection well section is blocked by the elastic water bags 301 on the upper and lower sides to form a closed exploration well section. Then, the mud and other turbid liquids in the closed exploration well section are drained by the drainage delivery pump 501, and the turbid liquids in the specific area of ​​the well are effectively removed. Thus, by isolating and removing the turbid liquids, a clean and clear environment is provided for optical imaging logging, thereby significantly improving the image quality and the accuracy of geological information.

[0051] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A logging device for oil exploration, comprising a main pressure-bearing shell (1), wherein a traction joint (101) is connected to the top of the main pressure-bearing shell (1), characterized in that: Also includes: A well logging and photographing chamber (2) is arranged at the center of the main pressure-bearing shell (1), an annular transparent window (201) is arranged around the middle of the well logging and photographing chamber (2), and an optical imaging sensor (205) is installed inside the well logging and photographing chamber (2); An annular storage groove (3) is symmetrically arranged at the upper and lower ends of the well logging and photographing chamber (2); an elastic water bag (301) is arranged in a surrounding manner on the inner side of the annular storage groove (3); the elastic water bag (301) is made of elastic material and expands uniformly as a whole when filled with liquid; a water filling switch valve (302) and a water discharge switch valve (303) are respectively connected to the left and right sides of the elastic water bag (301); A central delivery pipe (102) is arranged at the center of the main pressure-bearing shell (1); the top end of the central delivery pipe (102) is connected to a pipe joint (103); the bottom end of the central delivery pipe (102) is connected to a booster delivery pump (104); the booster delivery pump (104) is connected to the elastic water bag (301) via a water filling switch valve (302); A negative pressure drainage chamber (5) is arranged below the logging and photographing chamber (2). A drainage delivery pump (501) is installed inside the negative pressure drainage chamber (5). A drainage input pipe (502) and a drainage output pipe (503) are respectively connected to the upper and lower sides of the drainage delivery pump (501). The other end opening of the drainage input pipe (502) is arranged between the symmetrically arranged annular receiving grooves (3), and the other end opening of the drainage output pipe (503) is arranged below the negative pressure drainage chamber (5).

2. The logging device for oil exploration according to claim 1, characterized in that: An annular flushing pipe (106) is symmetrically arranged on the upper and lower sides of the outer side of the annular transparent window (201); the inner end of the annular flushing pipe (106) is connected to a flushing switch valve (105); the annular flushing pipe (106) is connected to the booster delivery pump (104) through the flushing switch valve (105); the outer side of the annular flushing pipe (106) is evenly and alternately arranged with inner flushing nozzles (107) and outer flushing nozzles (108); the inner flushing nozzles (107) are inclined toward the top of the annular transparent window (201), and the outer flushing nozzles (108) are inclined toward the outer side of the annular transparent window (201).

3. The logging device for oil exploration according to claim 1, characterized in that: A rotating adjustment frame (204) is arranged in the middle of the well logging shooting chamber (2), and the rotating adjustment frame (204) is rotatably connected to the main pressure-bearing shell (1). The optical imaging sensor (205) is installed in the middle of the rotating adjustment frame (204), and an annular fill light (206) is arranged around the outer side of the optical imaging sensor (205). A rotating gear ring (207) is arranged around the top of the rotating adjustment frame (204), and a driving gear (202) is arranged in meshing connection in the middle of the rotating gear ring (207). A driving motor (203) is connected to the shaft end of the driving gear (202), and the driving motor (203) is fixedly connected to the main pressure-bearing shell (1).

4. The logging device for oil exploration according to claim 1, characterized in that: An annular protective plate (4) is arranged around the outer side of the well logging shooting chamber (2), and a lifting guide groove (401) is vertically arranged in the middle of the inner side surface of the annular protective plate (4). The annular protective plate (4) is vertically slidably connected with the main pressure-bearing shell (1) through the lifting guide groove (401). When the annular protective plate (4) slides downward, the well logging shooting chamber (2) is completely covered therein, and when the annular protective plate (4) slides upward, the well logging shooting chamber (2) is exposed to the outside.

5. The logging device for oil exploration according to claim 4, characterized in that: A lifting rack (402) is arranged in the middle of the lifting guide groove (401), a lifting gear (403) is arranged in meshing connection with the inner side of the lifting rack (402), a lifting motor (404) is arranged in connection with the shaft end of the lifting gear (403), and the lifting motor (404) is fixedly connected to the main pressure-bearing shell (1).

6. The logging device for oil exploration according to claim 1, characterized in that: A rotating cleaning frame (6) is connected to the bottom of the negative pressure drainage chamber (5), and a rotating joint (602) is connected to the top of the rotating cleaning frame (6). The rotating cleaning frame (6) is rotatably connected to the main pressure-bearing shell (1) via the rotating joint (602). A planetary gearbox (603) is connected to the center of the rotating joint (602), and a cleaning motor (604) is connected to the top of the planetary gearbox (603). The cleaning motor (604) is fixedly connected to the main pressure-bearing shell (1).

7. The logging device for oil exploration according to claim 6, characterized in that: The outer side of the rotating cleaning frame (6) is evenly surrounded by a plurality of folding storage grooves (601), the inner side of the folding storage groove (601) is provided with a folding support frame (8) for receiving and engaging therein, the top end of the folding support frame (8) is provided with a folding shaft (801), the folding support frame (8) is rotatably connected to the rotating cleaning frame (6) via the folding shaft (801), and the bottom end of the folding support frame (8) is provided with a supporting shaft (802).

8. The logging device for oil exploration according to claim 7, characterized in that: A two-section support frame (804) is connected to the lower side of the support shaft (802), a cleaning brush (805) is arranged on the outer side of the two-section support frame (804), the two-section support frame (804) is rotatably connected to the folding support frame (8) via the support shaft (802), an elastic support sheet (803) is connected to the inner side of the two-section support frame (804), the two ends of the elastic support sheet (803) are respectively connected to the folding support frame (8) and the two-section support frame (804), and the two-section support frame (804) is supported by the elastic support sheet (803) to remain on the same straight line with the folding support frame (8).

9. The logging device for oil exploration according to claim 8, characterized in that: A central screw (7) is vertically installed at the center of the rotating cleaning frame (6); a screw motor (701) is connected to the axial end of the central screw (7); a connecting screw sleeve (702) is nested and connected to the outer side of the central screw (7); a plurality of folding connecting rods (703) are evenly connected and surrounded on the outer side of the connecting screw sleeve (702); the folding connecting rods (703) are arranged in a one-to-one correspondence with the folding support frame (8); the two ends of the folding connecting rod (703) are respectively rotatably connected to the connecting screw sleeve (702) and the folding support frame (8); the screw motor (701) drives the connecting screw sleeve (702) to move up and down through the central screw (7); when the connecting screw sleeve (702) moves up and down, it drives all the folding support frames (8) to rotate and be stored or unfolded synchronously along the folding shaft (801) through the folding connecting rod (703).

10. The logging device for oil exploration according to claim 9, characterized in that: The bottom end of the two-section support frame (804) is connected with a support claw (806), the middle of the bottom end of the folding support frame (8) is provided with a support fitting groove (905), the inside of the two-section support frame (804) is vertically provided with a support guide sleeve (9), the top of the support guide sleeve (9) is provided with a support opening (901), the inner side of the support guide sleeve (9) is nested and slidably provided with a support connecting column (903), the rear side of the support connecting column (903) is provided with a support spring (904), the middle of the support guide sleeve (9) is surrounded by an electromagnetic drive coil (902), the support connecting column (903) and the support fitting groove (905) are arranged to cooperate with each other, and the support connecting column (903) is embedded in the support fitting groove (905) when extending along the support opening (901).

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