Logging lowering device

Abstract

The utility model provides a well logging lowering device, which relates to the technical field of seismic exploration and comprises a base, a steel wire rope, a first winding drum, a second winding drum, a fixed pulley and a guide body. The first winding drum is used for penetrating through a winding core of a flexible strip coil. The second winding drum is used for penetrating a winding core of a steel wire rope coil. A wheel shaft of the fixed pulley is fixedly connected to the base, the flexible belt and the steel wire rope are wound around the fixed pulley in parallel, and the movable end of the flexible belt and the movable end of the steel wire rope are fixedly connected and extend into a well. The guiding body is fixedly connected with the moving end of the steel wire rope. And the moving end of the steel wire rope can be driven to move towards the bottom of the logging well under the gravity action of the guide body. The steel wire rope can drive the flexible belt to move towards the bottom of the well at the same speed, in the lowering process, it can be guaranteed that the flexible belt cannot be broken, the probability of friction between the flexible belt and the well wall is low, and therefore the success rate of lowering the flexible belt to the bottom of the well is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of seismic exploration, in particular to a downhole lowering device for a logging well. Background Art

[0002] During the seismic exploration process, it is necessary to collect relevant data at the bottom of a micro-logging well. When the depth of the micro-logging well exceeds 600 meters, a distributed fiber optic sensing seismograph is required to collect data at the bottom of the ultra-deep micro-logging well. When implementing this solution, one end of an optical fiber cable needs to be lowered to the bottom of the ultra-deep micro-logging well to transmit information.

[0003] Since the optical fiber cable itself is prone to breakage, when the micro-logging well is too deep, the optical fiber cable will inevitably break accidentally during the lowering process. In addition, the optical fiber cable is prone to friction with the well wall during the lowering process, which will cause damage to the optical fiber cable. This results in a low success rate of lowering the optical fiber, thereby reducing the exploration efficiency. Summary of the Utility Model

[0004] In view of this, the utility model provides a downhole lowering device for a logging well. When using this downhole lowering device to lower one end of a flexible belt to the bottom of the logging well, it can ensure that the flexible belt itself will not break and will not cause damage to the flexible belt, thereby increasing the success rate of lowering the flexible belt to the bottom of the logging well.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] The utility model discloses a downhole lowering device for a logging well. The downhole lowering device includes: a base, a steel wire rope, a first reel, a second reel, a fixed pulley, and a guiding body. The first reel is fixedly connected to the base and can rotate relative to the base around its own axis. The first reel is used for threading the core of a flexible belt roll. The second reel is fixedly connected to the base and can rotate relative to the base around its own axis. The axis of the first reel coincides with the axis of the second reel. The second reel is used for threading the core of a steel wire rope roll. The axle of the fixed pulley is fixedly connected to the base. The flexible belt and the steel wire rope are wound around the fixed pulley in parallel. The moving end of the flexible belt and the moving end of the steel wire rope are fixedly connected and extend into the logging well. The guiding body is fixedly connected to the moving end of the steel wire rope and is used for guiding the moving end of the steel wire rope to fall to the bottom of the logging well.

[0007] Optionally, the first reel includes a first stop end plate, a first cylindrical body, and a first pressing end plate. The first stop end plate is fixedly connected to the first end of the first cylindrical body, and the first pressing end plate is detachably connected to the second end of the first cylindrical body. The first cylindrical body is used to pass through the core of the flexible tape roll. The first stop end plate is used to limit the rotation of the core of the flexible tape roll relative to the first cylindrical body.

[0008] The plane of the first stop end plate is perpendicular to the axis of the first cylindrical body. When the first pressing end plate is connected to the second end of the first cylindrical body, the plane of the first pressing end plate is perpendicular to the axis of the first cylindrical body.

[0009] Optionally, the first reel further includes a first fixing pin, which can pass through the first pressing end plate to fixedly connect the first pressing end plate to the first cylindrical body.

[0010] Optionally, the second reel includes a second stop end plate, a second cylindrical body, and a second pressing end plate. The second stop end plate is fixedly connected to the first end of the second cylindrical body, and the second pressing end plate is detachably connected to the second end of the second cylindrical body. The second cylindrical body is used to pass through the core of the wire rope roll. The second stop end plate is used to limit the rotation of the core of the wire rope roll relative to the second cylindrical body.

[0011] The plane of the second stop end plate is perpendicular to the axis of the second cylindrical body. When the second pressing end plate is connected to the second end of the second cylindrical body, the plane of the second pressing end plate is perpendicular to the axis of the second cylindrical body.

[0012] Optionally, the second reel further includes a second fixing pin, which can pass through the second pressing end plate to fixedly connect the second pressing end plate to the second cylindrical body.

[0013] Optionally, the second pressing end plate is a circular plate, and a gripping member is provided at the edge of the second pressing end plate.

[0014] Optionally, the guiding body is a metal entity, and the metal entity is connected to the mobile end of the wire rope.

[0015] Optionally, the well logging lowering device further includes a braking device, which is fixedly connected to the base and used to hinder the rotation of the first reel and / or the second reel.

[0016] Optionally, the braking device includes a brake hub and brake shoes; the brake hub is coaxially and fixedly connected to the first drum and / or the second drum; the brake shoes are located inside the brake hub, and the brake shoes are in contact with or separated from the inner wall of the brake hub.

[0017] Optionally, the braking device further includes a camshaft, a return spring, and a brake handle;

[0018] The brake shoes include two sub-shoes which are arranged oppositely, and both ends of the return spring are respectively connected to the two sub-shoes; the camshaft is located between the two sub-shoes, and when the camshaft rotates, the two sub-shoes can be separated; the brake handle projects out of the brake hub and is fixedly connected to the camshaft, and the brake handle can drive the camshaft to rotate.

[0019] Compared with the related art, the beneficial effects of the present application are at least as follows:

[0020] In the embodiment of the present application, the base is used to support the first drum, the second drum, and the fixed pulley. When using the logging lowering device, first place the base on the ground, then sleeved the core of the flexible tape roll on the first drum and sleeved the core of the wire rope roll on the second drum, then fixedly connect the moving end of the flexible tape and the moving end of the wire rope, then wind the flexible tape and the wire rope parallelly around the fixed pulley, then lower the guiding body into the inside of the well logging, then rotate the second drum to unwind the wire rope roll, and under the gravity of the guiding body, the moving end of the wire rope can be driven to move towards the bottom of the well logging.

[0021] At this time, since the flexible tape and the wire rope are wound around the fixed pulley in parallel, and neither the flexible tape nor the wire rope slides on the surface of the fixed pulley, when the wire rope moves, the fixed pulley can be driven to rotate, and the rotation of the fixed pulley can drive the flexible tape to move, and then the first drum can be driven to rotate, so the flexible tape can be unwound. In addition, it can also ensure that the displacements generated by the moving ends of the flexible tape and the wire rope are the same, so that the wire rope can drive the flexible tape to move towards the bottom of the well logging at the same speed until the moving end of the flexible tape is lowered to the bottom of the well logging.

[0022] During the lowering process, since the flexible tape and the wire rope move synchronously, the flexible tape will not be subjected to a vertical tensile force, so that the flexible tape itself will not break. Then, since the wire rope can be made in a taut state under the gravity of the guiding body, that is, the wire rope entering the inside of the well logging is in a vertical straight line shape, and the well logging itself is also a vertical shaft, the probability of friction between the wire rope and the well wall is relatively low, and then the probability of friction between the flexible tape and the well wall is also relatively low, so the flexible tape will not be damaged, and the success rate of lowering the flexible tape to the bottom of the well logging is improved.

[0023] When the flexible belt is an optical fiber cable, during the process of lowering the optical fiber cable, since the optical fiber cable moves synchronously with the wire rope, the optical fiber cable will not be subjected to a vertical tensile force, thereby ensuring that the optical fiber cable itself will not break. Then, due to the gravitational force of the guiding body, the wire rope can be kept in a taut state, that is, the wire rope entering the well logging can be in a vertical straight line, and the well logging itself is also a vertical shaft, so the probability of friction between the wire rope and the well wall is relatively low, and thus the probability of friction between the optical fiber cable and the well wall is also relatively low, so it will not cause damage to the optical fiber cable, thereby improving the success rate of lowering the optical fiber cable to the bottom of the well logging. Description of the Drawings

[0024] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 is a schematic structural diagram of the first reel and the second reel of a well logging lowering device provided by an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of a fixed pulley of a well logging lowering device provided by an embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of a braking device of a well logging lowering device after being disassembled provided by an embodiment of the present invention.

[0028] Description of the Reference Numerals:

[0029] 1 - Base, 2 - Wire rope, 3 - First reel, 31 - First stop end plate, 32 - First cylindrical body, 33 - First pressing end plate, 4 - Second reel, 41 - Second stop end plate, 42 - Second cylindrical body, 43 - Second pressing end plate, 44 - Second fixing pin, 45 - Holding member, 5 - Fixed pulley, 51 - Annular groove, 7 - Wire rope coil, 8 - Braking device, 81 - Braking hub, 82 - Braking shoe, 821 - Sub - braking shoe, 83 - Camshaft, 84 - Return spring, 85 - Braking handle, D - Flexible belt coil, E - Flexible belt, F - Well logging. Detailed Embodiments

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description and claims of the present utility model, terms such as "first" and "second" are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances, so that the embodiments of the present utility model can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0032] It should be understood that "some embodiments" mentioned throughout the description means that specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present utility model. Therefore, "in some embodiments" appearing throughout the description does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0033] The following specifically introduces a downhole logging device provided by the present utility model by listing specific embodiments.

[0034] Figure 1 is a schematic structural diagram of the first reel 3 and the second reel 4 of a downhole logging device provided by an embodiment of the present utility model, Figure 2 is a schematic structural diagram of the fixed pulley 5 of a downhole logging device provided by an embodiment of the present utility model.

[0035] See Figure 1 and Figure 2 , the downhole logging device includes: a base 1, a steel wire rope 2, a first reel 3, a second reel 4, a fixed pulley 5 and a guiding body. The first reel 3 is fixedly connected to the base 1 and can rotate relative to the base 1 around its own axis. The first reel 3 is used for threading the core of the flexible tape roll D. The second reel 4 is fixedly connected to the base 1 and can rotate relative to the base 1 around its own axis. The axes of the first reel 3 and the second reel 4 coincide. The second reel 4 is used for threading the core of the steel wire rope roll 7. The axle of the fixed pulley 5 is fixedly connected to the base 1. The flexible tape E and the steel wire rope 2 are wound around the fixed pulley 5 in parallel. The moving end of the flexible tape E and the moving end of the steel wire rope 2 are fixedly connected and extend into the interior of the well F. The guiding body is fixedly connected to the moving end of the steel wire rope 2 and is used for guiding the moving end of the steel wire rope 2 to fall to the bottom of the well F.

[0036] In the embodiment of the present application, the base 1 is used to support the first reel 3, the second reel 4 and the fixed pulley 5. When using this downhole logging device, first place the base 1 on the ground, then sleeved the core of the flexible tape roll D on the first reel 3 and sleeved the core of the wire rope roll 7 on the second reel 4. Then fixedly connect the moving end of the flexible tape E and the moving end of the wire rope 2. Then wind the flexible tape E and the wire rope 2 parallelly around the fixed pulley 5. Then lower the guiding body into the interior of the well logging F. Then rotate the second reel 4 to unwind the wire rope roll 7. Under the action of the gravity of the guiding body, the moving end of the wire rope 2 can be driven to move towards the bottom of the well logging F.

[0037] At this time, since the flexible tape E and the wire rope 2 are wound around the fixed pulley 5 in parallel and neither the flexible tape E nor the wire rope 2 slides on the surface of the fixed pulley 5, when the wire rope 2 moves, it can drive the fixed pulley 5 to rotate, and the rotation of the fixed pulley 5 can drive the flexible tape E to move, thereby driving the first reel 3 to rotate, so the flexible tape E can be unwound. In addition, it can also ensure that the displacements generated by the moving end of the flexible tape E and the moving end of the wire rope 2 are the same, so that the wire rope 2 can drive the flexible tape E to move towards the bottom of the well logging F at the same speed until the moving end of the flexible tape E is lowered to the bottom of the well logging F.

[0038] During the lowering process, since the flexible tape E and the wire rope 2 move synchronously, the flexible tape E will not be subjected to a vertical tensile force, so that the flexible tape E itself will not break. Then, due to the gravity of the guiding body, the wire rope 2 can be kept in a taut state, that is, the wire rope 2 entering the interior of the well logging F is in a vertical straight line, and the well logging F itself is also a vertical shaft, so the probability of the wire rope 2 rubbing against the well wall is relatively low, and then the probability of the flexible tape E rubbing against the well wall is also relatively low, so the flexible tape E will not be damaged, thereby improving the success rate of lowering the flexible tape E to the bottom of the well logging F.

[0039] When the flexible tape E is an optical fiber cable, during the lowering process of the optical fiber cable, since the optical fiber cable and the wire rope 2 move synchronously, the optical fiber cable will not be subjected to a vertical tensile force, so that the optical fiber cable itself will not break. Then, due to the gravity of the guiding body, the wire rope 2 can be kept in a taut state, that is, the wire rope 2 entering the interior of the well logging F is in a vertical straight line, and the well logging F itself is also a vertical shaft, so the probability of the wire rope 2 rubbing against the well wall is relatively low, and then the probability of the optical fiber cable rubbing against the well wall is also relatively low, so the optical fiber cable will not be damaged, thereby improving the success rate of lowering the optical fiber cable to the bottom of the well logging F.

[0040] Among them, the above-mentioned base 1 is made by welding steel. The base 1 is divided into upper and lower layers. The lower layer is welded with square steel to form a rectangular base, which plays a supporting role when using the well logging lowering device to ensure the stability of the center of gravity of the entire device. The upper layer is a platform made of steel plates, which is used to connect other working components of the well logging lowering device. The upper layer and the lower layer are connected into a whole by four steel columns to ensure the stability of the entire base 1.

[0041] It should be noted that the cross-section of the above-mentioned first reel 3 or the second reel 4 can be circular, rectangular or polygonal, or other shapes, and the embodiments of the present application do not limit this.

[0042] It should also be noted that an annular groove 51 is provided on the edge of the above-mentioned fixed pulley 5, and the steel wire rope 2 and the flexible belt E are wound around the inner wall of the annular groove 51.

[0043] Optionally, in some embodiments, referring to Figure 1 and Figure 2 , the first reel 3 includes a first stop end plate 31, a first cylindrical body 32 and a first pressing end plate 33. The first stop end plate 31 is fixedly connected to the first end of the first cylindrical body 32, and the first pressing end plate 33 is detachably connected to the second end of the first cylindrical body 32; the first cylindrical body 32 is used to pass through the core of the flexible belt roll D; the first stop end plate 31 is used to limit the rotation of the core of the flexible belt roll D relative to the first cylindrical body 32; the plate surface of the first stop end plate 31 is perpendicular to the axis of the first cylindrical body 32; when the first pressing end plate 33 is connected to the second end of the first cylindrical body 32, the plate surface of the first pressing end plate 33 is perpendicular to the axis of the first cylindrical body 32.

[0044] In this way, when sleeving the flexible belt roll D on the first reel 3, first remove the first pressing end plate 33 from the first cylindrical body 32, then sleeve the flexible belt roll D on the first cylindrical body 32, and finally connect the first pressing end plate 33 to the first cylindrical body 32, so that the flexible belt roll D can be sleeved on the first reel 3. In this process, the first stop end plate 31 is used to limit the rotation of the core of the flexible belt roll D relative to the first cylindrical body 32, so that the flexible belt roll D can rotate synchronously with the first cylindrical body 32, and then the unfolding speed of the flexible belt E can be controlled.

[0045] When it is necessary to remove the flexible belt roll D from the first reel 3, first remove the first pressing end plate 33 from the first cylindrical body 32, then remove the flexible belt roll D from the first cylindrical body 32, and finally connect the first pressing end plate 33 to the first cylindrical body 32, so that the flexible belt roll D can be removed from the first reel 3.

[0046] This enables the flexible tape roll D to be more conveniently sleeved on or removed from the first reel 3, improving the efficiency of using this downhole logging device and thus enhancing the exploration efficiency.

[0047] In addition, since the plate surface of the first stop end plate 31 is perpendicular to the axis of the first cylindrical body 32; when the first pressing end plate 33 is connected to the second end of the first cylindrical body 32, the plate surface of the first pressing end plate 33 is perpendicular to the axis of the first cylindrical body 32. This can make the shape of the first reel 3 more regular, which is beneficial to the connection between various components.

[0048] Optionally, in some embodiments, referring to Figure 1 and Figure 2 , the first reel 3 further includes a first fixing pin, and the first fixing pin can be inserted through the first pressing end plate 33 for fixedly connecting the first pressing end plate 33 and the first cylindrical body 32.

[0049] In this way, the first pressing end plate 33 can be fixedly connected to or separated from the first cylindrical body 32 through the first fixing pin, thereby facilitating the sleeving of the flexible tape roll D on the first reel 3 or the removal of the flexible tape roll D from the first reel 3.

[0050] To make the connection effect of the first fixing pin better, threads can be provided on the first fixing pin. In this way, when the first fixing pin is inserted through the first pressing end plate 33, the two are threadedly connected, and thus the first pressing end plate 33 is more firmly connected to the first cylindrical body 32.

[0051] Optionally, in some embodiments, referring to Figure 1 and Figure 2 , the second reel 4 includes a second stop end plate 41, a second cylindrical body 42 and a second pressing end plate 43. The second stop end plate 41 is fixedly connected to the first end of the second cylindrical body 42, and the second pressing end plate 43 is detachably connected to the second end of the second cylindrical body 42; the second cylindrical body 42 is used for passing through the core of the wire rope reel 7; the second stop end plate 41 is used for restricting the rotation of the core of the wire rope reel 7 relative to the second cylindrical body 42; the plate surface of the second stop end plate 41 is perpendicular to the axis of the second cylindrical body 42; when the second pressing end plate 43 is connected to the second end of the second cylindrical body 42, the plate surface of the second pressing end plate 43 is perpendicular to the axis of the second cylindrical body 42.

[0052] In the embodiment of the present application, since the second stop end plate 41 is fixedly connected to the first end of the second cylinder body 42, and the second pressing end plate 43 is detachably connected to the second end of the second cylinder body 42; the second cylinder body 42 is used to pass through the core of the wire rope reel 7; the second stop end plate 41 is used to limit the rotation of the core of the wire rope reel 7 relative to the second cylinder body 42. Thus, when sleeving the wire rope reel 7 onto the second reel 4, first remove the second pressing end plate 43 from the second cylinder body 42, then sleeve the wire rope reel 7 onto the second cylinder body 42, and finally connect the second pressing end plate 43 to the second cylinder body 42, so that the wire rope reel 7 can be sleeved onto the second reel 4. In this process, the second stop end plate 41 is used to limit the rotation of the core of the wire rope reel 7 relative to the second cylinder body 42, so that the wire rope reel 7 can rotate synchronously with the second cylinder body 42, and thus the deployment speed of the wire rope 2 can be controlled. Since the moving end of the flexible belt E is fixedly connected to the moving end of the wire rope 2, the deployment speed of the flexible belt E can be controlled accordingly.

[0053] When it is necessary to remove the wire rope reel 7 from the second reel 4, first remove the second pressing end plate 43 from the second cylinder body 42, then remove the wire rope reel 7 from the second cylinder body 42, and finally connect the second pressing end plate 43 to the second cylinder body 42, so that the wire rope reel 7 can be removed from the second reel 4.

[0054] This enables the wire rope reel 7 to be more conveniently sleeved onto the second reel 4 or removed from the second reel 4, improving the efficiency of using the downhole logging device and thus enhancing the exploration efficiency.

[0055] In addition, since the plate surface of the second stop end plate 41 is perpendicular to the axis of the second cylinder body 42; when the second pressing end plate 43 is connected to the second end of the second cylinder body 42, the plate surface of the second pressing end plate 43 is perpendicular to the axis of the second cylinder body 42. This can make the shape of the second reel 4 more regular, which is beneficial to the connection between components.

[0056] Optionally, in some embodiments, referring to Figure 1 and Figure 2 , the second reel 4 further includes a second fixing pin 44, and the second fixing pin 44 can pass through the second pressing end plate 43 for fixedly connecting the second pressing end plate 43 to the second cylinder body 42.

[0057] In this way, the second pressing end plate 43 can be fixedly connected to or separated from the second cylinder body 42 through the second fixing pin 44, which is convenient for sleeving the flexible belt reel D onto the second reel 4 or removing it from the second reel 4.

[0058] To achieve a better connection effect of the second fixing pin 44, threads can be provided on the second fixing pin 44. In this way, when the second fixing pin 44 is passed through the second pressing end plate 43, the two are threadedly connected, thereby making the connection between the second pressing end plate 43 and the second cylindrical body 42 more firm.

[0059] Optionally, in some embodiments, referring to Figure 1 and Figure 2 , the second pressing end plate 43 is a circular plate, and a holding member 45 is provided at the edge of the second pressing end plate 43.

[0060] In this way, when the technician rotates the second reel 4, it can be rotated by hand-holding the holding member 45. Since the holding member 45 is provided at the edge of the second pressing end plate 43. In this way, when the second pressing end plate 43 is rotated through the holding member 45 to drive the second reel 4 to rotate, according to the lever principle, it can play a role in saving effort. Thus, it enables the technician to more easily complete the lowering work of the steel wire rope 2 and the flexible belt E.

[0061] It should be noted that the above-mentioned holding member 45 can be a protruding rod or a protruding ring, or other components that can be held by hand. The embodiments of the present application do not limit this. When it is a protruding rod, it can be a handle.

[0062] Optionally, in some embodiments, referring to Figure 1 and Figure 2 , the guiding body is a metal entity, and the metal entity is connected to the mobile end of the steel wire rope 2.

[0063] Since the density of the metal is relatively large, when the guiding body is a metal entity, its volume can be reduced while ensuring that the guiding body has a certain weight. Furthermore, the probability of the guiding body colliding with the well wall when lowering in the logging well F can be reduced, and thus the success rate of lowering the flexible belt E can be improved. In addition, when the volume of the guiding body is small, it is also convenient to carry. In this way, when it is necessary to transfer the logging lowering device, the transfer efficiency of the logging lowering device can be improved.

[0064] To further improve the success rate of lowering the flexible belt E, the guiding body can be set to a conical shape. During the process of lowering the guiding body, the tip of the conical body is facing downwards. In this way, the swinging of the steel wire rope 2 caused by the conical body during the lowering process can be reduced, and further the probability of the guiding body colliding with the well wall when lowering in the logging well F can be reduced, thereby improving the success rate of lowering the flexible belt E.

[0065] It should be noted that the above-mentioned conical body can be a cone or a pyramid, or other types of cones. The embodiments of the present application do not limit this.

[0066] It should be noted that the raw material of the above cone can be not only metal, but also concrete or stone, or other types of materials with a relatively large density. The embodiments of the present application do not limit this.

[0067] Optionally, in some embodiments, referring to Figure 1 、 Figure 2 and Figure 3 , the logging lowering device further includes a braking device 8. The braking device 8 is fixedly connected to the base 1 and is used to prevent the first reel 3 and / or the second reel 4 from rotating.

[0068] Since the depths of different logging Fs are different, when using this logging lowering device to lower the flexible belt E, the lengths of the steel wire rope 2 and the flexible belt E deployed are also different. To meet this requirement, a braking device 8 is provided for this logging lowering device. The braking device 8 is used to prevent the first reel 3 and / or the second reel 4 from rotating. In this way, when the steel wire rope 2 and the flexible belt E are deployed to any length, they can be fixed at this length by preventing the first reel 3 and / or the second reel 4 from rotating to adapt to the different depths of different logging Fs. Furthermore, the applicable range of this logging lowering device is increased.

[0069] Optionally, in some embodiments, referring to Figure 1 、 Figure 2 and Figure 3 , the braking device 8 includes a brake hub 81 and brake shoes 82; the brake hub 81 is coaxially and fixedly connected to the first reel 3 and / or the second reel 4; the brake shoes 82 are located inside the brake hub 81, and the brake shoes 82 are in contact with or separated from the inner wall of the brake hub 81.

[0070] When the brake shoes 82 are separated from the inner wall of the brake hub 81, the brake hub 81 can rotate freely relative to the brake shoes 82. Since the brake hub 81 is coaxially and fixedly connected to the first reel 3 and / or the second reel 4, the first reel 3 and / or the second reel 4 can rotate freely relative to the brake shoes 82. At this time, the steel wire rope 2 and the flexible belt E can be deployed freely.

[0071] When the brake shoes 82 are in contact with the inner wall of the brake hub 81, the brake hub 81 cannot rotate relative to the brake shoes 82 at this time. Since the brake hub 81 is coaxially and fixedly connected to the first reel 3 and / or the second reel 4, the first reel 3 and / or the second reel 4 cannot rotate relative to the brake shoes 82. At this time, the steel wire rope 2 and the flexible belt E stop deploying.

[0072] When using this downhole logging device, first separate the brake shoe 82 from the inner wall of the brake hub 81, and lower the wire rope 2 and the flexible belt E until the free ends of the wire rope 2 and the flexible belt E fall to the bottom of the well logging F. Then abut the brake shoe 82 against the inner wall of the brake hub 81. At this time, the first reel 3 and / or the second reel 4 cannot rotate relative to the brake shoe 82, and the wire rope 2 and the flexible belt E are fixed at this length, facilitating the development of exploration work.

[0073] Optionally, in some embodiments, refer to Figure 1 、 Figure 2 and Figure 3 , the braking device 8 further includes a camshaft 83, a return spring 84 and a brake handle 85; the brake shoe 82 includes two sub-shoes 821, the two sub-shoes 821 are arranged oppositely, and both ends of the return spring 84 are respectively connected to the two sub-shoes 821; the camshaft 83 is located between the two sub-shoes 821, and when the camshaft 83 rotates, the two sub-shoes 821 can be separated; the brake handle 85 projects out of the brake hub 81 and is fixedly connected to the camshaft 83, and the brake handle 85 can drive the camshaft 83 to rotate.

[0074] Among them, the spring is a common elastic element, which can provide a pulling force to the two oppositely arranged sub-shoes 821 to make them approach each other. When they approach each other, the brake shoe 82 is separated from the inner wall of the brake hub 81, and the brake hub 81 can rotate freely relative to the brake shoe 82. At this time, the wire rope 2 and the flexible belt E can be freely deployed.

[0075] The camshaft 83 is located between the two sub-shoes 821. When the camshaft 83 rotates, the two sub-shoes 821 can abut against the inner wall of the brake hub 81. At this time, the brake hub 81 cannot rotate relative to the brake shoe 82. At this time, the wire rope 2 and the flexible belt E stop deploying.

[0076] Since the brake handle 85 projects out of the brake hub 81 and is fixedly connected to the camshaft 83, the brake handle 85 can drive the camshaft 83 to rotate. In this way, when the technician rotates the camshaft 83, the brake handle 85 can be held by hand to drive the camshaft 83 to rotate. At this time, the brake handle 85 acts as a lever. In this way, when the brake handle 85 drives the camshaft 83 to rotate, according to the lever principle, it can play a role in saving effort. Furthermore, it enables the technician to more easily complete the lowering work of the wire rope 2 and the flexible belt E.

[0077] Refer to Figure 1 、 Figure 2 and Figure 3, when using the flexible belt E below the downhole logging device, if it is necessary to brake or slow down the lowering speed of the wire rope 2, the brake handle 85 can be rotated. The brake handle 85 drives the camshaft 83 to rotate. Under the action of the camshaft 83, the brake shoes 82 expand outwards and abut against the inner wall of the brake hub 81. Under the action of friction, the rotation speed of the brake hub 81 slows down. If the brake handle 85 is continuously rotated, the friction force will continue to increase until the brake hub 81 stops rotating. At this time, the first reel 3 and / or the second reel 4 stop rotating, so that the lowering speed of the wire rope 2 and the flexible belt E can be controlled to ensure that the flexible belt E is not broken. When the technician releases the brake handle 85, the brake shoes 82 can return to their original positions, and thus the braking is cancelled. At this time, the first reel 3 and / or the second reel 4 can rotate again, and thus the flexible belt E can continue to be lowered.

[0078] It should be noted that the above flexible belt E can be an optical fiber cable, an electric wire, or other flexible belts E that are prone to breakage or wear and tear. The embodiments of the present application do not limit this.

[0079] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or terminal device comprising the element.

[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A downhole logging device, characterized in that, Comprising: Base (1); Steel wire rope (2); First reel (3), the first reel (3) is fixedly connected to the base (1) and can rotate relative to the base (1) about its own axis, and the first reel (3) is used for threading the core of the flexible tape roll D; Second reel (4), the second reel (4) is fixedly connected to the base (1) and can rotate relative to the base (1) about its own axis, the axis of the first reel (3) coincides with the axis of the second reel (4), and the second reel (4) is used for threading the core of the steel wire rope reel (7); Fixed pulley (5), the axle of the fixed pulley (5) is fixedly connected to the base (1), the flexible tape E and the steel wire rope (2) are wound around the fixed pulley (5) in parallel, and the moving end of the flexible tape E and the moving end of the steel wire rope (2) are fixedly connected and extend into the well logging F; Guide body, the guide body is fixedly connected to the moving end of the steel wire rope (2) and is used for guiding the moving end of the steel wire rope (2) to fall to the bottom of the well logging F.

2. The downhole logging device according to claim 1, wherein The first reel (3) includes a first stop end plate (31), a first cylindrical body (32) and a first pressing end plate (33), the first stop end plate (31) is fixedly connected to the first end of the first cylindrical body (32), and the first pressing end plate (33) is detachably connected to the second end of the first cylindrical body (32); the first cylindrical body (32) is used for threading the core of the flexible tape roll D; the first stop end plate (31) is used for restricting the core of the flexible tape roll D from rotating relative to the first cylindrical body (32); The plate surface of the first stop end plate (31) is perpendicular to the axis of the first cylindrical body (32); when the first pressing end plate (33) is connected to the second end of the first cylindrical body (32), the plate surface of the first pressing end plate (33) is perpendicular to the axis of the first cylindrical body (32).

3. The downhole logging device according to claim 2, characterized in that, The first reel (3) further includes a first fixing pin, and the first fixing pin can penetrate through the first pressing end plate (33) for fixedly connecting the first pressing end plate (33) and the first cylindrical body (32).

4. The downhole logging device according to claim 1, characterized in that, The second reel (4) Includes a second stop end plate (41), a second cylindrical body (42) and a second pressing end plate (43), the second stop end plate (41) is fixedly connected to the first end of the second cylindrical body (42), and the second pressing end plate (43) is detachably connected to the second end of the second cylindrical body (42); the second cylindrical body (42) is used for threading the core of the steel wire rope reel (7); the second stop end plate (41) is used for restricting the core of the steel wire rope reel (7) from rotating relative to the second cylindrical body (42); The plate surface of the second stop end plate (41) is perpendicular to the axis of the second cylindrical body (42); when the second pressing end plate (43) is connected to the second end of the second cylindrical body (42), the plate surface of the second pressing end plate (43) is perpendicular to the axis of the second cylindrical body (42).

5. The downhole logging device according to claim 4, characterized in that, The second reel (4) further includes a second fixing pin (44) which can pass through the second pressing end plate (43) for fixedly connecting the second pressing end plate (43) and the second cylindrical body (42).

6. The downhole logging device according to claim 5, wherein, The second pressing end plate (43) is a circular plate, and a holding member (45) is provided at the edge of the second pressing end plate (43).

7. The downhole logging device according to claim 1, wherein The guiding body is a metal entity which is connected to the mobile end of the wire rope (2).

8. The downhole logging device according to any one of claims 1-7, characterized in that, The well logging lowering device further includes a braking device (8) which is fixedly connected to the base (1) and is used to hinder the rotation of the first reel (3) and / or the second reel (4).

9. The downhole logging device according to claim 8, characterized in that, The braking device (8) includes a braking hub (81) and brake shoes (82); the braking hub (81) is coaxially and fixedly connected to the first reel (3) and / or the second reel (4); the brake shoes (82) are located inside the braking hub (81), and the brake shoes (82) are in contact with or separated from the inner wall of the braking hub (81).

10. The downhole logging device according to claim 9, characterized in that, The braking device (8) further includes a camshaft (83), a return spring (84) and a braking handle (85). The brake shoes (82) include two sub-shoes (821) which are arranged oppositely, and the two ends of the return spring (84) are respectively connected to the two sub-shoes (821); the camshaft (83) is located between the two sub-shoes (821), and when the camshaft (83) rotates, the two sub-shoes (821) can be separated; the braking handle (85) projects out of the braking hub (81) and is fixedly connected to the camshaft (83), and the braking handle (85) can drive the camshaft (83) to rotate.

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