Variable-diameter hanging logging instrument

Abstract

The variable-diameter hanging logging instrument comprises a hanging sleeve body, a hanging head set, a motor set, a rib plate set, a push rod and a transmission lead screw, the hanging sleeve body is a carrier of the variable-diameter hanging logging instrument, and the hanging head set is arranged at the top end of the hanging sleeve body and is suitable for being in communication connection with an upper-end logging instrument. The motor set is arranged below the hanging sleeve body to provide kinetic energy for transmission, the rib plate set is arranged on the hanging sleeve body and connected with a rotating pin and can rotate within a certain range to achieve the variable-diameter function, the push rod can move in the hanging sleeve body in the horizontal direction, and the transmission lead screw rotates in the hanging sleeve body through a motor. The rotary motion is converted into linear motion to be transmitted to the push rod, the push rod moves towards the top end of the hanging sleeve body and makes contact with the opening angle of the rib plate, and the variable-diameter hanging logging instrument can be hung at the position to be measured through the unfolded rib plate by controlling the circumferential diameter of the variable-diameter hanging logging instrument. And the hanging head group is in wireless communication connection with a logging instrument on the ground, so that measured information is obtained.

Description

Technical Field

[0001] The present application relates to the field of well logging technology, and in particular to a variable-diameter hanging well logging instrument. Background Art

[0002] In the process of geological exploration for oil, natural gas, etc., logging operations are one of the important means to obtain underground geological information. As the core equipment of logging operations, the performance of logging instruments directly affects the accuracy of logging data and operating efficiency. Traditional logging instruments usually adopt a fixed diameter design, which often has limitations in practical applications. In recent years, variable diameter logging instruments have been designed. This type of logging instrument adjusts its own diameter to adapt to wellbores of different sizes, so that the logging instrument can change its own diameter and hang on the wellbore. However, the existing variable diameter logging instruments still have complex structural problems in design, which limits the promotion and application of variable diameter logging instruments. Summary of the invention

[0003] In view of this, the present application proposes a variable diameter hanging logging tool.

[0004] According to one aspect of the present application, a variable diameter hanging logging tool is provided, comprising: a hanging sleeve body, a hanging head group, a motor group, a rib plate group, a push rod and a transmission screw;

[0005] The hanging sleeve body is a carrier of the variable diameter hanging logging instrument. The hanging head group is arranged at the top of the hanging sleeve body and is suitable for connecting a communication link with the upper end logging instrument. The motor group is arranged in the hanging sleeve body to provide kinetic energy for transmission. The rib plate group is arranged on the hanging sleeve body and is connected with a turn pin. It can rotate within a certain range to realize the variable diameter function. The push rod is movable in the horizontal direction in the hanging sleeve body. The transmission screw rotates in the hanging sleeve body through the motor, converts the rotational motion into linear motion and transmits it to the push rod. The push rod moves toward the top of the hanging sleeve body and contacts to open the opening angle of the rib plate group.

[0006] In a possible implementation, the rib plate group includes a plurality of rib plates, the inner side of the rib plates is streamlined and abuts against the end of the push rod;

[0007] There are a plurality of ribs, and the inner sides of the plurality of ribs are spaced apart by a preset distance. The push rod can move to the inner sides of the plurality of ribs to open the rib group in a direction away from the axis of the hanging sleeve body.

[0008] In a possible implementation, it further includes: an intermediate joint;

[0009] The intermediate joint is a structure with two ends open and a hollow interior, one end of which is embedded in the hanging sleeve body;

[0010] The transmission screw is arranged in the middle joint, one end of which extends out to be connected with the push rod, and the other end is connected with the motor group, and one end of the transmission screw is connected to the output end of the motor group, driving the transmission screw to rotate in the middle joint, and the other end of the transmission screw is provided with an external thread, which is connected with the internal thread bolt provided at one end of the push rod, driving the push rod to reciprocate along the length direction of the hanging sleeve body.

[0011] In a possible implementation, the method further includes: protecting the outer tube;

[0012] The protective outer tube is a tubular structure, and is connected to the casing body through the intermediate joint;

[0013] The motor group is arranged inside the protective outer tube, and the output end of the motor group is located in the middle joint and connected to the transmission screw.

[0014] In a possible implementation, the device further includes: a motor fixing bracket;

[0015] The motor fixing frame is arranged inside the protective outer tube, with the outer side attached to the inner wall of the protective outer tube and the inner side matched with the motor group to fix the motor group.

[0016] In a possible implementation, the invention further includes: a linear coupling;

[0017] The linear coupling is arranged in the middle joint, and its two ends are respectively connected to the output end of the motor group and the transmission screw. The output end of the motor group rotates in a circumferential direction, and the torque is transmitted to the transmission screw through the linear coupling.

[0018] In a possible implementation, the invention further includes: a radial bearing;

[0019] The radial bearing is arranged in the middle joint, the inner side of which is connected to the transmission screw rod, and the outer side of which is connected to the middle joint. The motor group drives the transmission screw rod to rotate circumferentially relative to the middle joint.

[0020] In a possible implementation, it further includes: an electronic control unit and a protective plug;

[0021] The electronic control unit is arranged inside the protective outer tube, is in communication connection with the motor group, and controls the opening and closing of the motor group;

[0022] The protective plug is arranged at one end of the protective outer tube away from the middle joint to seal the protective outer tube.

[0023] In a possible implementation, the device further includes: a spring;

[0024] The rib plate group is rotatably connected to the top end of the hanging sleeve body and can be rotated toward the outside of the hanging sleeve body. A spring mounting hole is provided at the top end of the hanging sleeve body toward the direction of the rib plate group. The spring mounting hole is located outside the rotation position of the rib plate group and can resist the rotation of the rib plate group toward the inside of the hanging sleeve body.

[0025] In a possible implementation, the plurality of rib plate groups are rotated to the outside of the hanging sleeve body, and the cross-sectional diameter of the plurality of rib plate groups after being unfolded is larger than the cross-sectional diameter of the sleeve body;

[0026] The cross-sectional diameter of the hanging sleeve body is the same as the cross-sectional diameter of the protective outer tube.

[0027] In a possible implementation, the hanging sleeve body is provided with a sliding groove, the sliding groove corresponds to the rib plate group, and the rib plate group can partially slide into the interior of the sliding groove when it is rotated to the hanging sleeve body;

[0028] Wherein, the sliding groove comprises a first sliding groove and a second sliding groove, and the first sliding groove and the second sliding groove are arranged vertically;

[0029] The rib plate includes a rib plate main plate and a rib plate sub-plate, the rib plate main plate is connected to the hanging sleeve main body through a turn pin, and a third sliding groove with the same dovetail groove structure as the first sliding groove is opened on the outer side of the rib plate main plate, and a sliding part matching the third sliding groove and the first sliding groove structure is extended and protruded from the inner side of the rib plate sub-plate, when the rib plate main plate is unfolded, the third sliding groove corresponds to the first sliding groove and is located on the same straight line, when the rib plate main plate is unfolded, the rib plate sub-plate can slide from the rib plate main plate into the first sliding groove and the second sliding groove, so that the rib plate sub-plate can be recovered into the hanging sleeve main body when the rib plate main plate is unfolded, and the unfolded rib plate main plate is located in the hanging sleeve main body.

[0030] The beneficial effects of the variable diameter hanging logging instrument of the embodiment of the present application are as follows: the diameter of the variable diameter hanging logging instrument can be changed by manipulating the circumferential diameter of the variable diameter hanging logging instrument, the variable diameter hanging logging instrument can be hung at the position to be measured through the unfolded rib plate group, and the hanging head group is wirelessly connected to the logging instrument on the well to obtain the measured information. Among them, the variable diameter hanging logging instrument is used to be placed on the seated logging instrument for measurement and obtain the information to be measured, and in the present application, the rib plate group can be displayed relative to the overall structure through the motor group, transmission screw, push rod and rib plate group, and can be hung on the seated logging instrument, and the rib plate group can be retracted and taken out for secondary use. Among them, when the logging instrument passes through the drilling tool, if the push rod or the transmission screw is damaged and the rib plate group is stuck at the drilling tool exit position, the problem can be solved by forcibly pulling out the logging instrument. At this time, the drilling tool will press against the rib plate sub-plate and cut off the fixing column. Since the fixing column is cut off, the rib plate sub-plate can slide relative to the rib plate main plate and be recovered into the hanging sleeve body, ensuring that the logging instrument can be successfully taken out in an emergency.

[0031] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0033] Figure 1 A schematic diagram showing a rib plate group of a variable diameter hanging logging tool according to an embodiment of the present application when it is not deployed;

[0034] Figure 2 A schematic diagram showing the deployment of the rib plate group of the variable diameter hanging logging tool according to an embodiment of the present application is shown;

[0035] Figure 3 An enlarged schematic diagram showing a rib plate group of a variable diameter hanging logging tool according to an embodiment of the present application without being unfolded;

[0036] Figure 4 Another enlarged schematic diagram showing the rib plate group of the variable diameter hanging logging tool of the embodiment of the present application is not unfolded;

[0037] Figure 5 A schematic diagram showing an expanded and enlarged view of a rib plate group of a variable diameter hanging logging tool according to an embodiment of the present application;

[0038] Figure 6 Another schematic diagram showing the expansion and enlargement of the rib plate group of the variable diameter hanging logging tool of the embodiment of the present application;

[0039] Figure 7 An enlarged schematic diagram showing a variable diameter hanging logging tool according to an embodiment of the present application;

[0040] Figure 8 Another enlarged schematic diagram showing the variable diameter hanging logging tool of the embodiment of the present application;

[0041] Fig. 9 A schematic cross-sectional view of a rib plate group of a variable diameter hanging logging tool according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0042] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0043] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "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 or 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 cannot be understood as a limitation on the present invention.

[0044] 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 one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0046] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0047] like Figure 1As shown, the variable diameter hanging logging instrument of the embodiment of the present application includes: a hanging sleeve body 2, a hanging head group 1, a motor group 12, a rib plate group, a push rod 4 and a transmission screw 5. The hanging sleeve body 2 is a carrier of the variable diameter hanging logging instrument. The hanging head group 1 is arranged at the top of the hanging sleeve body 2, and is suitable for connecting a communication link with the upper end logging instrument. The motor group 12 is arranged in the hanging sleeve body 2 to provide kinetic energy for transmission. The rib plate group is arranged on the hanging sleeve body 2 and is connected by a turn pin, and can rotate within a certain range to realize the variable diameter function. The push rod 4 is movable in the horizontal direction in the hanging sleeve body 2. The transmission screw 5 rotates in the hanging sleeve body 2 through the motor, and converts the rotational motion into linear motion and transmits it to the push rod 4. The push rod 4 moves toward the top of the hanging sleeve body 2 and contacts to open the opening angle of the rib plate group.

[0048] In this embodiment, the diameter of the variable diameter hanging logging instrument can be changed by manipulating the circumferential diameter of the variable diameter hanging logging instrument, and the variable diameter hanging logging instrument can be hung at the position to be measured through the unfolded rib plate group, and the hanging head group 1 is wirelessly connected to the logging instrument on the well to obtain the measured information. Among them, the variable diameter hanging logging instrument is used to be placed on the seated logging instrument for measurement to obtain the information to be measured, and in this application, the rib plate group can be displayed relative to the overall structure through the motor group 12, the transmission screw rod, the push rod 4 and the rib plate group, and can be hung on the seated logging instrument, and the rib plate group can be retracted and taken out for secondary use.

[0049] Specifically, when the logging instrument is lowered to the target formation, the ground sends a command to the logging instrument, and the motor bracket 13 drives the motor group 12 to start rotating in one direction after performing logical judgment, and transmits the torque to the transmission screw 5 through the linear coupling 10, and the transmission screw 5 transmits the torque to the push rod 4 through the thread. The push rod 4 and the hanging sleeve body 2 are provided with rotation restrictions. Therefore, the torque can only be converted into a linear motion of the push rod 4 to the left. The push rod 4 forces the three ribs to open through the three-petal cam on the head. The motor group 12 is provided with a detection device. After rotating to the number of circles required by the design, the motor bracket 13 considers that the task is completed and issues a stop action command to the motor group 12. At this time, the push rod 4 just moves to the left end limit position, and the three ribs also reach the maximum opening angle under the force of the cam of the push rod 4. The entire diameter-changing action is completed, and the outer diameter of the three ribs exceeds the original outer diameter of the logging instrument, so it can be measured on the seated logging. After the seated logging is completed, the ground sends a command to the logging instrument, and the motor fixing frame 13 drives the motor group 12 to start rotating in the opposite direction to the previous direction after logical judgment; through the above-mentioned reverse direction action, the push rod 4 moves linearly to the right. Similarly, the motor group 12 stops after rotating to the number of circles required by the design. At this time, the push rod 4 just moves to the right end limit position. After the three ribs are no longer restricted by the cam of the push rod 4, they are compressed into the inside of the logging instrument by the spring set at the left end.

[0050] It should be noted that the hanging sleeve body 2 is the carrier of the entire equipment, which has sufficient strength and stability and can withstand various pressures and impacts during the logging process. The hanging head group 1 is located at the top of the hanging sleeve body 2. The hanging head group 1 adopts communication link technology to ensure stable and efficient data transmission and command reception between the upper end logging instrument, and can obtain logging data in real time, and make corresponding adjustments and operations as needed. The motor group 12 provides the kinetic energy for transmission for the entire equipment. Rib plate group: The rib plate group is a key component to achieve the variable diameter function. They are connected to the hanging sleeve body 2 through a rotating pin and can rotate freely within a certain range. The rib plate group will rotate accordingly through the motor group 12, the transmission screw and the push rod 4 according to the instruction, so as to achieve the change of diameter. The transmission screw 5 rotates in the hanging sleeve body 2 through the motor group 12, and converts the rotational motion into linear motion and transmits it to the push rod 4. The push rod 4 is movable in the horizontal direction in the hanging sleeve body 2, receives the linear motion from the transmission screw 5, and converts it into power to push the rib plate to open.

[0051] In a specific embodiment, the rib plate group includes a plurality of rib plates, the inner side of the rib plates is streamlined, abuts against the end of the push rod 4, and is spaced from the inner side of the rib plates by a preset distance. The push rod 4 can move to the inner side of the plurality of rib plates to open the plurality of rib plates in the direction away from the axis of the hanging sleeve body 2. The rib plate group can be pushed out of the hanging sleeve body 2 by the push rod 4, and can also be returned to the casing body after the push pipe is retracted, so as to complete the deployment and recovery of the rib plate group relative to the variable diameter hanging logging instrument. Among them, the number of rib plates is three or more, and the rib plates are arranged at intervals in the circumferential direction around the variable diameter hanging logging instrument, so that when the variable diameter hanging logging instrument is hung on the seated logging instrument, it is more stable and reliable. Specifically, the inner side of the rib plate is a streamlined structure, which greatly optimizes the interaction between the rib plate and the push rod 4, and facilitates the end of the push rod 4 to push the rib plate group, so that the rib plate group can be deployed relative to the hanging sleeve body 2, and the streamlined inner side design enables the rib plate group to be deployed more smoothly and smoothly when pushed by the push rod 4. In addition, the rib plate is not a single one, but is composed of multiple rib plates, which are distributed in a circumferential or annular manner on the hanging sleeve body 2, and the inner sides of each other are spaced at a preset distance, so as to ensure that the rib plate group can be evenly stressed when opening, and avoid deformation or damage caused by uneven stress, and at the same time provide sufficient space for the movement of the push rod 4. When the push rod 4 moves horizontally along the hanging sleeve body 2 under the drive of the transmission screw 5, it can easily move to the inner side of the multiple rib plates. As the push rod 4 continues to move, it will gradually contact the inner side of the rib plate group and apply an outward thrust, which will cause the rib plate to rotate around its rotation pin connection point, so as to open in the direction away from the axis of the hanging sleeve body 2. Due to the existence of multiple rib plate groups and the preset spacing distances on their inner sides, the push rod 4 can act on multiple rib plates at the same time, so that they are opened synchronously.

[0052] In a specific embodiment, it also includes: an intermediate joint 9, which is a structure with two ends open and hollow inside, one end of which is embedded in the hanging sleeve body 2, a transmission screw is arranged in the intermediate joint 9, one end of which is extended to connect with the push rod 4, and the other end is connected with the motor group 12, and one end of the transmission screw is connected with the output end of the motor group 12, driving the transmission screw to rotate in the intermediate joint 9, and the other end of the transmission screw is provided with an external thread, which is connected with the internal thread bolt provided at one end of the push rod 4, driving the push rod 4 to reciprocate along the length direction of the hanging sleeve body 2. The intermediate joint 9 is the load-bearing part connecting the upper and lower sections of the instrument, and is used as the connecting part and load-bearing part of the hanging sleeve body 2 and the protective outer tube 14, so as to avoid the problem of poor force in the middle position due to the excessive length of the hanging sleeve body 2 or the protective outer tube 14.

[0053] Among them, the middle joint 9 is a hollow structure with both ends open and inside, and the two ends are respectively embedded in the ends of the hanging sleeve body 2 and the protective outer tube 14, and are used to connect the hanging sleeve body 2 and the protective outer tube 14. The transmission screw 5 is arranged in the middle joint 9, and the two ends extend out and are respectively connected with the motor group 12 and the push rod 4. The output end of the motor group 12 is connected to one end of the transmission screw 5, driving the transmission screw 5 to rotate in the middle joint 9, and the other end of the transmission screw 5 is provided with an external thread, which is connected with the internal thread bolt provided at one end of the push rod 4, thereby driving the push rod 4 to reciprocate along the length direction of the hanging sleeve body 2.

[0054] Furthermore, in this specific embodiment, one end of the transmission screw is closely connected to the output end of the motor group 12. When the motor group 12 is started, it drives the transmission screw to rotate stably in the intermediate joint 9. The end of the transmission screw not connected to the motor group 12 adopts an external thread, and the internal thread opened at one end of the push rod 4 matches the internal thread, which is a firm connection between the transmission screw and the push rod 4. At the same time, when the transmission screw rotates, it can drive the push rod 4 to reciprocate along the length direction of the hanging sleeve body 2.

[0055] In a specific embodiment, it also includes: a protective outer tube 14, which is a tubular structure and is connected to the sleeve body through the intermediate joint 9. The motor group 12 is arranged inside the protective outer tube 14, and the output end of the motor group 12 is located in the intermediate joint 9 and connected to the transmission screw. The motor group 12 and the motor fixing frame 13 are arranged inside the protective outer tube 14, which are used to protect and install the motor group 12 and the motor fixing frame 13. The protective outer tube 14 is connected to the hanging sleeve body 2 through the intermediate joint 9.

[0056] Furthermore, in this specific embodiment, the protective outer tube 14 is a tubular structure with openings at both ends and a hollow interior, which enhances the structural strength and durability of the logging instrument and also provides necessary protection and support for key components such as the motor group 12. The protective outer tube 14 is made of a corrosion-resistant and hard material to prevent the protective outer tube 14 from being damaged during use.

[0057] Moreover, the variable diameter hanging logging instrument as a whole is composed of three parts: the hanging sleeve body 2, the middle joint 9 and the protective outer tube 14. Compared with an integral structure, the hanging sleeve body 2, the middle joint 9 and the protective outer tube 14 can be disassembled, which is convenient for the installation, maintenance and replacement of internal parts, ensuring the long-term stable operation of the logging instrument.

[0058] In a specific embodiment, it also includes: a motor fixing frame 11, which is arranged inside the protective outer tube 14, with the outer side attached to the inner wall of the protective outer tube 14 and the inner side matched with the motor group 12 to fix the motor group 12. The motor fixing frame 11 is arranged inside the protective outer tube 14, with the outer side attached to the inner wall of the protective outer tube 14 and the inner side matched with the motor group 12 to ensure that the motor group 12 remains stable during operation.

[0059] Specifically, the inner side of the motor mounting bracket 11 matches the motor group 12, and the motor mounting bracket 11 can tightly wrap the motor group 12 to provide stable support and fixation for it, thereby ensuring the stable operation of the motor group 12 during the logging process and improving its ability to resist vibration and impact.

[0060] The motor fixing frame 11 may be made of high-strength and light-weight material.

[0061] It should be noted that the motor fixing frame 11 is arranged inside the protective outer tube 14 and is located inside the end where the protective outer tube 14 is connected to the intermediate joint 9, so that the motor fixing frame 11 fixes the output end of the motor group 12 and can extend into the intermediate joint 9 to connect with the transmission screw to complete the transmission of kinetic energy. The motor fixing frame 11 is embedded in the end of the protective outer tube 14 and can be fixed and installed by bolt leveling, bonding, or interference connection.

[0062] In a specific embodiment, it also includes: a linear coupling 10, which is arranged in the middle joint 9, and its two ends are respectively connected to the output end of the motor group 12 and the transmission screw, and the output end of the motor group 12 rotates in the circumferential direction, and the torque is transmitted to the transmission screw 5 through the linear coupling 10. The linear coupling 10 is arranged in the middle joint 9, and its two ends are respectively connected to the output end of the motor group 12 and the transmission screw 5. When the output end of the motor group 12 rotates in the circumferential direction, the torque is transmitted to the transmission screw 5 through the linear coupling 10.

[0063] Specifically, the linear coupling 10 is arranged in the middle joint 9, and its two ends are respectively connected to the output end of the motor group 12 and the transmission screw 5. When the output end of the motor group 12 rotates in the circumferential direction, the torque is transmitted to the transmission screw 5 through the linear coupling 10, driving the transmission screw to rotate in the circumferential direction.

[0064] In a specific embodiment, it also includes: a radial bearing 7, which is arranged in the middle joint 9, connected to the transmission screw rod on the inside and connected to the middle joint 9 on the outside, and the motor group 12 drives the transmission screw rod to rotate circumferentially relative to the middle joint 9. The inner side of the radial bearing 7 is closely connected to the transmission screw rod of the logging instrument, while the outer side is firmly connected to the middle joint 9, ensuring that the radial bearing 7 can withstand the radial force and torque from the transmission screw rod when the logging instrument is working, thereby maintaining the stable operation of the logging instrument. Specifically, the motor group 12 drives the transmission screw rod to rotate circumferentially relative to the middle joint 9, and through the transmission effect of the radial bearing 7, the stability and accuracy of the rotation process are ensured, and the presence of the radial bearing 7 effectively reduces the friction and wear between the transmission screw rod and the middle joint 9, thereby extending the service life of the logging instrument.

[0065] In a specific embodiment, it also includes: a motor fixing frame 13 and a protective plug 15. The motor fixing frame 13 is arranged inside the protective outer tube 14, communicates with the motor group 12, and controls the opening and closing of the motor group 12. The protective plug 15 is arranged at one end of the protective outer tube 14 away from the middle joint 9 to seal the protective outer tube 14.

[0066] The motor fixing frame 13 is arranged inside the protective outer tube 14 and is connected to the motor group 12 in communication, and can accurately receive and process the instructions from the operator to achieve precise control of the motor group 12. The main function of the motor fixing frame 13 is to control the opening, closing and speed of the motor group 12, thereby achieving precise control of the measurement process of the logging instrument.

[0067] The protective outer tube 14 is open at both ends, one of which is connected to the middle joint 9, and the other end is provided with a protective plug 15 to seal the end. The protective plug 15 is provided at the end of the protective outer tube 14 away from the middle joint 9 to seal the protective outer tube 14 and prevent external impurities such as moisture and dust from entering the well logging instrument and causing damage to the electronic components and transmission mechanism. The design of the protective plug 15 not only considers its sealing performance, but also fully considers the convenience of installation and the feasibility of disassembly, so that the well logging instrument can be quickly maintained and repaired when necessary.

[0068] In a specific embodiment, it also includes: a spring, the top of the rib plate group is rotatably connected in the hanging sleeve body 2, and can rotate toward the outside of the hanging sleeve body 2, and a spring installation hole is opened in the top of the hanging sleeve body 2 in the direction of the rib plate group, and the spring installation hole is located outside the rotation position of the rib plate group, which can resist the rib plate group to rotate toward the inside of the hanging sleeve body 2. Among them, the rib plate group is fixed by the rotatable connection at the top, and the rib plate group can rotate toward the outside of the hanging sleeve body 2, and can be adaptively adjusted according to the size and shape of the wellbore to ensure that the logging instrument can be stably suspended in the well.

[0069] In this specific embodiment, the push rod 4 can push the inner side of the rib plate group and unfold the rib plate group toward the outside of the hanging protective body. When the push rod 4 is away from the rib plate group, the rib plate group has no power to recover. Therefore, a spring mounting hole is opened at the top of the hanging protective body, and the embedded spring is always in a compressed state, which can provide a reaction force to push the rib plate group into the hanging sleeve body 2.

[0070] Specifically, the position where the rib plate group is rotatably connected to the sleeve body is located near one end of the sleeve body, and the position where the spring installation hole is opened is closer to the outer layer of the sleeve body 2 relative to the rotation position of the rib plate group. When the rib plate group is subjected to external force, the spring in the spring installation hole can provide a reverse resistance, effectively resisting the tendency of the rib plate group to rotate toward the inside of the sleeve body 2. In addition, the introduction of the spring not only improves the rib plate group's ability to resist external forces, but also enables it to maintain a more stable posture when facing changes in the wellbore. When the wellbore diameter decreases or the shape changes, the rib plate group will be squeezed by the well wall and rotate outward. At this time, the elastic force of the spring will provide a reverse support force to ensure that the rib plate group will not rotate excessively inward and lose stability.

[0071] In a specific embodiment, the multiple ribs are rotated to the outside of the hanging sleeve body 2, and the cross-sectional diameter of the multiple ribs after unfolding is larger than the cross-sectional diameter of the sleeve body. The cross-sectional diameter of the hanging sleeve body 2 is the same as the cross-sectional diameter of the protective outer tube 14.

[0072] In a specific embodiment, a sliding groove is provided on the hanging sleeve body 2, and the sliding groove is arranged obliquely, corresponding to the position of the rib plate, and the sliding groove includes a first sliding groove 18 and a second sliding groove 19, and the first sliding groove 18 and the second sliding groove 19 are arranged up and down. Specifically, the first sliding groove 18 is in the shape of a long strip, and is inclined at a preset angle relative to the length direction of the hanging sleeve body 2, and the cross section of the first sliding groove 18 is an isosceles trapezoid, and the second sliding groove 19 is a pointed structure, the upper side is connected to the first sliding groove 18, and is connected to the smaller end of the cross section of the first sliding groove 18, and the lower part is exposed. In addition, the lower side inclination angle of the second sliding groove 19 is greater than the upper side inclination angle, so that the cross section of the second sliding groove 19 is a triangular angle.

[0073] In this specific embodiment, the rib plate includes two parts, namely a rib plate main plate 3 and a rib plate sub-plate 17 .

[0074] The rib main plate 3 is connected to the hanging sleeve body 2 through a rotating pin and can rotate within a certain range. The inner side of the rib main plate 3 adopts a streamlined design and abuts against the end of the push rod 4 to ensure that the rib plate can be pushed to open smoothly when the push rod 4 moves. After the rib main plate 3 is fully unfolded, the diameter of multiple rib main plates 3 is less than or equal to the cross-sectional diameter of the hanging sleeve body 2. The streamlined inner side design enables the rib main plate 3 to be more smoothly and smoothly unfolded when pushed by the push rod 4. This design effectively reduces the friction and resistance between the rib main plate 3 and the push rod 4, thereby improving the transmission efficiency. In addition, the rib main plate 3 does not exist alone, but is composed of multiple rib main plates 3. These rib main plates 3 are distributed in a circular or annular shape on the hanging sleeve body 2, and the inner sides of each other are separated by a preset distance, which not only ensures that the rib main plate 3 can be evenly stressed when opened, avoiding deformation or damage caused by uneven stress, but also provides sufficient space for the movement of the push rod 4. When the push rod 4 moves horizontally along the hanging sleeve body 2 under the drive of the transmission screw 5, it can easily move to the inner side of the plurality of ribs, and as the push rod 4 continues to move, it gradually contacts the inner side of the ribs and exerts an outward thrust. This thrust causes the ribs to rotate around their pivot connection points, thereby opening in a direction away from the axis of the hanging sleeve body 2.

[0075] The rib plate sub-plate 17 is a pointed structure, which can be used to hang the variable diameter hanging logging instrument. A third sliding groove 20 with the same dovetail groove structure as the first sliding groove 18 is provided on the outer side of the rib plate main plate 3, and a sliding part matching the third sliding groove 20 and the first sliding groove 18 is extended from the inner side of the rib plate sub-plate 17, and the cross section of the sliding part is an isosceles trapezoid. In addition, when the rib plate main plate 3 is unfolded, the third sliding groove 20 corresponds to the first sliding groove 18 and is located on the same straight line. The sliding part on the inner side of the rib plate sub-plate 17 is embedded in the third sliding groove, so that the rib plate sub-plate 17 can slide in the third sliding groove 20 relative to the rib plate main plate 3, and when the rib plate main plate 3 is unfolded, the rib plate sub-plate 17 can slide from the rib plate main plate 3 to the first sliding groove 18 and the second sliding groove 19, so that when the rib plate main plate 3 is in the unfolded state, the rib plate sub-plate 17 slides into the sleeve main body, thereby reducing the overall diameter of the rib plate. In addition, the rib plate sub-plate 17 has a pointed structure, which can be used to hang the variable diameter hanging logging tool.

[0076] Furthermore, in this specific embodiment, a fixing groove is also opened on the outer side of the rib main plate 3, and the opening direction of the fixing groove is perpendicular to the sliding direction of the third sliding groove 20, and a penetrating fixing hole is opened on the rib sub-plate 17 along the length direction of the vertical sliding part, and the fixing hole corresponds to the fixing groove. A columnar fixing column 16 can be used to fix the rib main plate 3 and the rib sub-plate 17 to prevent the rib sub-plate 17 from sliding relative to the rib main plate 3. When the logging instrument passes through the drilling tool, if the push rod 4 or the transmission screw is damaged, the rib plate is stuck at the exit position of the drilling tool, resulting in damage to the rib plate. Therefore, the present application divides the rib plate into two parts: the rib plate main plate 3 and the rib plate sub-plate 17. When the push rod 4 or the transmission screw is damaged, the push rod 4 presses against the inner side of the rib plate main plate 3 so that the rib plate main plate 3 is always in the unfolded state. When the logging instrument is forcibly taken out, the drilling tool presses against the rib plate sub-plate 17 and cuts off the fixing column 16. At this time, the rib plate sub-plate 17 can slide relative to the rib plate main plate 3, from the third sliding groove 20 opened on the outside of the rib plate main plate 3, to the first sliding groove 18 and the second sliding groove 19, so that the rib plate sub-plate 17 returns to the inside of the hanging sleeve body 2, and the logging instrument is taken out as a whole.

[0077] Specifically, a third sliding groove 20 is provided on the outer side of the rib main plate 3, and a sliding portion matching the third sliding groove 20 is provided on the inner side of the rib sub-plate 17, so that the rib sub-plate 17 can slide in the third sliding groove 20 relative to the rib main plate 3. When the rib main plate 3 is unfolded, the rib sub-plate 17 can slide from the rib main plate 3 to the first sliding groove 18 and the second sliding groove 19, so that the rib sub-plate 17 can be recovered into the hanging sleeve body 2 when the rib main plate 3 is unfolded, thereby reducing the overall diameter of the rib. A fixing groove is also provided on the outer side of the rib main plate 3, and a fixing hole corresponding to the fixing groove is provided on the rib sub-plate 17. The rib main plate 3 and the rib sub-plate 17 are fixed together by a columnar fixing column 16 to prevent the rib sub-plate 17 from sliding relative to the rib main plate 3. When the logging instrument passes through the drilling tool, if the push rod 4 or the transmission screw is damaged and causes the rib to be stuck at the drilling tool exit position, the problem can be solved by forcibly pulling out the logging instrument. At this time, the drilling tool will press against the rib plate sub-plate 17 and cut off the fixing column 16. Since the fixing column 16 is cut off, the rib plate sub-plate 17 can slide relative to the rib plate main plate 3 and be recovered into the hanging sleeve body 2, ensuring that the logging instrument can be successfully taken out in an emergency.

[0078] It should be noted that the opening direction of the second sliding groove 19 and the third sliding groove 18 has an inclination angle relative to the length direction of the logging instrument, and the inclination angle is the angle of the outer plane when the rib plate main plate 3 is unfolded, so that when the rib plate main plate 3 is in the unfolded state, the rib plate sub-plate 17 can slide into the second sliding groove 19 through the first sliding groove 18 after cutting off the fixing column 16, and complete the recovery of the rib plate sub-plate 17. Among them, the unfolded diameter of the rib plate main plate 3 is the same as the diameter of the logging instrument, or smaller than the diameter of the logging instrument, so that after the logging instrument is recovered, the rib plate sub-plate 17 can be taken out of the drilling tool even if the rib plate is in the unfolded state. Specifically, the opening directions of the second sliding groove 19 and the third sliding groove 20 have an inclination angle relative to the length direction of the logging instrument, ensuring that the rib plate sub-plate 17 can smoothly slide into the first sliding groove 18 and the second sliding groove 19 when the rib plate main plate 3 is in the expanded state, and the expanded diameter of the rib plate main plate 3 is the same as or smaller than the diameter of the logging instrument, which ensures that after the rib plate sub-plate 17 is recovered, the logging instrument can be taken out from the drilling tool even if the rib plate main plate 3 is in the expanded state.

[0079] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A variable diameter hanging logging tool, characterized in that: include: Hanging sleeve body, hanging head assembly, motor assembly, rib assembly, push rod and transmission screw; The hanging sleeve body is a carrier of the variable diameter hanging logging instrument. The hanging head group is arranged at the top of the hanging sleeve body and is suitable for connecting a communication link with the upper end logging instrument. The motor group is arranged below the hanging sleeve body to provide transmission kinetic energy. The rib plate group is arranged on the hanging sleeve body and is connected with a turn pin. It can rotate within a certain range to realize the variable diameter function. The push rod is movable in the horizontal direction of the hanging sleeve body. The transmission screw rotates in the hanging sleeve body through the motor, converts the rotational motion into linear motion and transmits it to the push rod. The push rod moves toward the top of the hanging sleeve body and contacts to open the opening angle of the rib plate group.

2. The variable diameter hanging logging tool according to claim 1, characterized in that: The rib plate group includes a plurality of rib plates, the inner side of each rib plate is streamlined and abuts against the end of the push rod; There are a plurality of ribs, and the inner sides of the plurality of ribs are spaced apart by a preset distance. The push rod can move to the inner sides of the plurality of ribs to open the rib group in a direction away from the axis of the hanging sleeve body.

3. The variable diameter hanging logging tool according to claim 2, characterized in that: Also includes: Intermediate joint; The intermediate joint is a structure with two ends open and a hollow interior, one end of which is embedded in the hanging sleeve body; The transmission screw is arranged in the middle joint, one end of which extends out to be connected to the push rod, and the other end is connected to the motor group, and one end of the transmission screw is connected to the output end of the motor group, driving the transmission screw to rotate in the middle joint, and the other end of the transmission screw is provided with an external thread, which is connected to the internal thread bolt provided at one end of the push rod, driving the push rod to reciprocate along the length direction of the hanging sleeve body.

4. The variable diameter hanging logging tool according to any one of claims 1 to 3, characterized in that: Also includes: Protect the outer tube; The protective outer tube is a tubular structure, and is connected to the casing body through the intermediate joint; The motor group is arranged inside the protective outer tube, and the output end of the motor group is located in the middle joint and connected to the transmission screw.

5. The variable diameter hanging logging tool according to claim 4, characterized in that: Also includes: Motor mounting bracket; The motor fixing frame is arranged inside the protective outer tube, with the outer side attached to the inner wall of the protective outer tube and the inner side matched with the motor group to fix the motor group.

6. The variable diameter hanging logging tool according to claim 4, characterized in that: Also includes: Linear couplings; The linear coupling is arranged in the middle joint, and its two ends are respectively connected to the output end of the motor group and the transmission screw. The output end of the motor group rotates in a circumferential direction, and the torque is transmitted to the transmission screw through the linear coupling.

7. The variable diameter hanging logging tool according to claim 6, characterized in that: Also includes: Radial bearings; The radial bearing is arranged in the middle joint, the inner side is connected to the transmission screw, and the outer side is connected to the middle joint, and the motor group drives the transmission screw to rotate circumferentially relative to the middle joint.

8. The variable diameter hanging logging tool according to claim 6, characterized in that: Also includes: Electronic control unit and protective plug; The electronic control unit is arranged inside the protective outer tube, is in communication connection with the motor group, and controls the opening and closing of the motor group; The protective plug is arranged at one end of the protective outer tube away from the middle joint to seal the protective outer tube.

9. The variable diameter hanging logging tool according to claim 4, characterized in that: Also includes: spring; The top end of the rib plate group disposed in the hanging sleeve body is rotatably connected and can be rotated toward the outside of the hanging sleeve body, and a spring mounting hole is provided at the top end of the hanging sleeve body in the direction of the rib plate group, and the spring mounting hole is located outside the rotation position of the rib plate group and can resist the rib plate from rotating toward the inside of the hanging sleeve body; The plurality of ribs are rotated to the outside of the sleeve body, and the cross-sectional diameter of the plurality of ribs after being unfolded is larger than the cross-sectional diameter of the sleeve body; The cross-sectional diameter of the hanging sleeve body is the same as the cross-sectional diameter of the protective outer tube.

10. The variable diameter hanging logging tool according to claim 1, characterized in that: A sliding groove on the hanging sleeve body, the sliding groove corresponds to the rib plate group, and the rib plate group can partially slide into the interior of the sliding groove when it rotates to the hanging sleeve body; Wherein, the sliding groove comprises a first sliding groove and a second sliding groove, and the first sliding groove and the second sliding groove are arranged vertically; The rib plate includes a rib plate main plate and a rib plate sub-plate, the rib plate main plate is connected to the hanging sleeve main body through a turn pin, and a third sliding groove with the same dovetail groove structure as the first sliding groove is opened on the outer side of the rib plate main plate, and a sliding part protruding and extending from the inner side of the rib plate sub-plate matches the third sliding groove and the first sliding groove structure. When the rib plate main plate is unfolded, the third sliding groove corresponds to the first sliding groove and is located on the same straight line. When the rib plate main plate is unfolded, the rib plate sub-plate can slide from the rib plate main plate into the first sliding groove and the second sliding groove, so that the rib plate sub-plate can be recovered into the hanging sleeve main body when the rib plate main plate is unfolded, and the unfolded rib plate main plate is located in the hanging sleeve main body.

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