A sonar tool for detecting the shape of a salt cavern

Abstract

The application discloses a sonar tool for detecting the shape of a salt cave cavity, comprising a power part, a guide part and a detection part, wherein the power part comprises two groups of motors, the guide part comprises a rotating part, and the detection part comprises a sonar; the power part is used for providing power for the turning and detection of the tool, the guide part is used for driving the turning of the detection part, and the detection part is used for sending and receiving sound waves for detection; the two groups of motors are both permanent magnet motors, namely permanent magnet motor one and permanent magnet motor two, and are arranged in two sets of housings arranged in an upper and lower mode and connected together. The internal structure of the complete set of devices is arranged, the rotating device is more flexible, mechanical rotation can be realized under the control of the electric control, the shape and volume of the connected salt cave cavity can be accurately determined, and the demand for a measuring tool capable of rapidly measuring the shape and volume of the connected salt cave cavity in the prior art is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of exploration tools, in particular to a sonar detection tool, and more particularly to a sonar tool for detecting the shape of a salt cave. BACKGROUND

[0002] Due to low permeability, good sealing, high safety and stability, underground salt rock solution cavity is considered as an ideal place for oil and gas storage and waste disposal. In order to reasonably utilize the storage space of salt rock solution cavity and ensure its economic, efficient, environmental protection and other multiple benefits, it is necessary to first measure the structure shape and size of the solution cavity. According to domestic and foreign experience, the detection of salt cave space during the construction of gas storage is an important parameter for evaluating the gas storage capacity and safety of salt cave. The sonar measurement technology is a method for accurately measuring the volume and distribution of underground salt cave space at present, but it is a series of complex engineering and technical problems to build a gas storage cavity with a volume of hundreds of thousands or even millions of cubic meters in a salt layer nearly one kilometer deep underground, from selecting a suitable salt layer to using water solution mining method to shape the salt layer cavity, and then completing the well and putting into use and maintenance. The traditional way is to use a cable to drag the sonar to move vertically up and down in the salt rock solution cavity to detect the shape of the cavity. This method is easy to implement for vertical solution cavity, but it is difficult to use this method for salt rock solution cavity with a diameter of tens of meters or even hundreds of meters and a length of hundreds of meters. The salt cavity is usually located one kilometer deep underground, and the diameter of the wellbore limits the radial size of the instrument entering the well, so the design of the instrument shell structure is also crucial to the instrument measurement, especially the need for convenient steering with good operation performance.

[0003] According to these requirements, some research institutions have developed some tools that can perform related detection, such as the similar solution provided in USRE31074E, but this solution is limited by its structural design, which requires direct meshing of gears to drive its rotation, and instability is prone to occur in the downhole environment. Other existing technologies also have similar problems, making it difficult to perform actual construction. Moreover, the structure cannot actually achieve axial rotation and end rotation simply, and the use effect is not good. SUMMARY

[0004] In view of the above problems, the present application provides a sonar tool for detecting the shape of a salt cave, which sets the internal structure of the complete set of devices, makes the rotating device more flexible, and can realize mechanical rotation under electric control, so as to accurately determine the shape and volume of the connected salt cave, and meet the demand for measuring tools that can quickly measure the shape and volume of the connected salt cave in the prior art.

[0005] The technical scheme of the present application is as follows:

[0006] A sonar tool for detecting the shape of salt caverns includes a power unit, a guide unit, and a detection unit. The power unit includes two sets of motors, the guide unit includes a rotating component, and the detection unit includes sonar. The power unit provides power for the tool to steer and detect, the guide unit drives the detection unit to steer, and the detection unit transmits and receives sound waves for detection.

[0007] Both sets of motors are permanent magnet motors, namely permanent magnet motor one and permanent magnet motor two, which are respectively housed in two sets of housings arranged vertically and connected together. These two sets of housings serve as the upper housing and the middle housing, respectively. A lower housing is provided below the middle housing. Part of the rotating component is located inside the middle housing, and part of it is separately located on the lower side of the middle housing. This part of the housing serves as the upper end of the lower housing. A carrier seat is also provided on the lower side of the lower housing. Permanent magnet motor one is used to drive the middle housing to rotate circumferentially along the upper housing, and permanent magnet motor two is used to drive the lower housing to rotate axially relative to the middle housing.

[0008] Furthermore, a cable is provided inside the upper housing, which is connected to the top of the upper housing and extends into the upper housing. Multiple drive circuit boards and control circuit boards are provided inside the upper housing and the middle housing, and the cable is in contact with the drive circuit boards and control circuit boards.

[0009] A drive circuit board 1 and a control circuit board 1 are installed inside the upper housing, and a permanent magnet motor 1 is installed in the area below the drive circuit board 1 and the control circuit board 1; a drive circuit board 2 and a control circuit board 2 are installed inside the middle housing, and a permanent magnet motor 2 is installed in the area below the drive circuit board 2 and the control circuit board 2.

[0010] Furthermore, a partition is provided between the first drive circuit board and the first control circuit board and the first permanent magnet motor, serving as partition one; a partition is provided between the second drive circuit board and the second control circuit board and the second permanent magnet motor, serving as partition two.

[0011] The first partition is a disc-shaped part with a hole in the middle, and an annular protrusion perpendicular to the disc-shaped surface is provided on the outer side of the disc-shaped surface and the outer side of the hole. Multiple through slots are opened on the disc-shaped surface of the first partition. Multiple protruding positioning blocks are provided on the outer peripheral surface of the annular protrusion on the outer side of the first partition. Corresponding positioning slots are provided on the inner wall of the upper housing for fixing the positioning blocks and thus fixing the first partition. The structure and installation method of the second partition are the same as those of the first partition.

[0012] Further, the partition piece is provided below with a rotary transformer I, including a stator I and a rotor I, the rotor I is a ring-shaped structure with a hole, a rotor shaft I is connected in the hole, the upper and lower ends of the rotor shaft I are provided with protruding steps, the rotor I is installed on the step surface of the rotor shaft I through a flat key, the stator I is installed on the inner wall of the partition piece I, the bottom of the upper shell is provided with an inwardly extending reduced diameter section, a thrust bearing is arranged on the reduced diameter section as a thrust bearing I, the step of the bottom of the rotor shaft I is placed on the thrust bearing I and rotates;

[0013] The partition piece II is provided below with a rotary transformer II, including a stator II and a rotor II, the rotor II is a ring-shaped structure with a hole, a rotor shaft II is connected in the hole, the upper and lower ends of the rotor shaft II are provided with protruding steps, the rotor II is installed on the step surface of the rotor shaft II through a flat key, the stator II is installed on the inner wall of the partition piece II, the middle shell is provided with an inwardly extending reduced diameter section at a position close to the bottom, a thrust bearing is arranged on the reduced diameter section as a thrust bearing II, the step of the bottom of the rotor shaft II is placed on the thrust bearing II and rotates.

[0014] Further, the stator I and the stator II are stator laminations, which are stator lamination group I and stator lamination group II respectively, the rotor I and the rotor II are magnetic steel groups, which are magnetic steel group I and magnetic steel group II respectively, the magnetic steel group I and the magnetic steel group II are respectively provided with a sheath I and a sheath II outside.

[0015] Further, the bottom of the rotor shaft I passes through the bottom of the upper shell and extends to the inside of the top of the middle shell and is fixed; the bottom of the rotor shaft II passes through the step of the bottom area of the middle shell and extends downward, and a structure connected with the rotating part is arranged at the end to realize the movement of the rotating part.

[0016] Further, the middle shell includes a middle end cover and a motor shell II, the middle end cover is fixed on the upper end of the motor shell II, the inside of the middle end cover is fixed with the rotor shaft I, when the rotor shaft I rotates, the middle shell rotates;

[0017] The bottom of the rotor shaft II is provided with a cylindrical gear surface;

[0018] The bottom of the motor shell two is fixedly connected with an inclinator shell, the inside of the inclinator shell is provided with an upper end opening, the lower end is provided with an arc section, the side surface of the arc section of the inclinator shell is provided with two plane sections, each of the plane sections is provided with a through hole, a rotating support shaft is installed in one of the through holes, a bevel gear is fixed to the inner side end of the rotating support shaft, the bevel gear is engaged with the conical gear surface of the rotor shaft two, a connecting wing is arranged on the outer side end of the rotating support shaft, the connecting wing is in a strip-shaped structure, two round holes are arranged on the connecting wing, one of the round holes is fixed to the outer side of the rotor shaft two, and the other round hole is used for connecting the lower shell body; a wire passing shaft is installed in the other through hole, the wire passing shaft is a hollow shaft, the inner side end of the wire passing shaft is fixed to the inner wall of the inclinator shell, and the outer side of the wire passing shaft is used for fixedly connecting the connecting wing, a small hole is arranged on the side wall of the wire passing shaft close to the outer side, a channel is arranged in the connecting wing corresponding to the small hole, and the other end of the channel is provided with an opening penetrating the wall surface of the connecting wing, and the opening is connected to the inside of the lower shell body.

[0019] Further, the lower shell body is divided into an upper end body and a carrier seat, the upper end body is provided with a space connected to the opening of the connecting wing to avoid the opening, and the lower part of the upper end body is provided with a space for placing an electronic compass; the bottom of the upper end body is fixed to the top of the carrier seat, a main channel and a plurality of branch channels are arranged in the carrier seat, and the end of each branch channel is provided with a transducer, the circuit of the transducer passes through the branch channel and the main channel, and then penetrates the upper end body and the connecting wing and continues to extend upwards.

[0020] Further, the upper end of the partition one and the partition two are respectively provided with a radiator one and a radiator two, the radiator one is a cylindrical structure with external radiation fins, the driving circuit board one and the control circuit board one are arranged on the outer wall of the cylinder, and the radiation fins serve as wings and are in contact with the inner wall of the motor shell one.

[0021] Further, the upper shell body comprises a cable connecting shell and a motor shell one, the cable connecting shell is fixed above the motor shell one, the outer part of the cable connecting shell is in a two-section structure with a small upper part and a large lower part, the inside of the cable connecting shell is also provided with a plurality of levels, a cable connecting shaft with a step on the outer side of the bottom is installed in the cable connecting shell, the cable connecting shaft is fixed on the step in the cable connecting shell through the step, and a locking nut for being fixed from the other end is arranged on the cable connecting shaft, so that the cable connecting shaft can be fixed on the cable connecting shell.

[0022] The present application has the advantages that:

[0023] 1. The segmented structure design adopted by the present application enables the sonar tool to realize circumferential rotation and tail swing, the control scheme is flexible, can adapt to the special terrain of salt rock solution cavity, and is convenient for flexible control and processing.

[0024] 2、The structure of the present application adopts modular design, almost every part can be disassembled and installed, convenient for later adjustment and maintenance, through directly replacing the shell with different types of ultrasonic transducer, adapting to different working environment and demand, saving time and improving work efficiency;

[0025] 3、The sonar detection instrument of the present application, the measurement accuracy of the instrument is derived from the sensor placed inside the instrument shell, the high-precision sensor is used to accurately record the working position of the transducer in the well, the computer analyzes the data, and the accurate underground salt cavity shape is drawn; Internal hidden line is adopted, power and signal are transmitted, wear of the line during well drilling and line winding that may occur when the instrument rotates are prevented; The line connection layout is reasonable, and will not be damaged due to rotation and swing, etc., to ensure the safety during use;

[0026] 4、The sonar detection instrument of the present application adopts high-efficiency permanent magnet motor, which is high in efficiency, small in size, large in torque, can directly drive the load, does not need to use a reduction box, increases the reliability of the whole system, the driving control system can transmit the running state of the motor to the ground at the same time, which is beneficial to improve the working efficiency, the structure is reliable, reasonable and compact, convenient for processing and manufacturing, and also convenient for later maintenance and replacement. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a shell structure diagram of the tool for measuring the shape and volume of the salt cavity of the present application;

[0028] Figure 2 It is a sectional view of the upper half part of the present application;

[0029] Figure 3 It is a sectional view of the lower half part of the present application;

[0030] Figure 4 It is a sectional view of the cable connection shell of the present application;

[0031] Figure 5 It is a sectional view of the cable joint of the present application;

[0032] Figure 6 It is a sectional view of the upper shell of the present application;

[0033] Figure 7 It is a schematic view of the heat sink of the present application;

[0034] Figure 8 It is a schematic view of the partition of the present application;

[0035] Figure 9 It is a schematic view of the rotor shaft one and rotor one combination of the present application;

[0036] Figure 10 It is a sectional view of the upper end cover of the present application;

[0037] Figure 11 is a sectional view of the motor housing two;

[0038] Figure 12 is a sectional view of the middle housing of the present application;

[0039] Figure 13 is a schematic view of the rotor shaft two and rotor two combination of the present application;

[0040] Figure 14 is a schematic view of the tilt mechanism housing of the present application;

[0041] Figure 15 is a schematic view of the rotor shaft and gear engagement of the present application;

[0042] Figure 16 is a schematic view of the wire passage shaft of the present application;

[0043] Figure 17 is a schematic view of the rotation support shaft of the present application;

[0044] Figure 18 is a schematic view of the connecting tab of the present application;

[0045] Figure 19 is a sectional view of the connecting tab of the present application;

[0046] Figure 20 is a schematic view of the hexagonal nut of the present application;

[0047] Figure 21 is a sectional view of the upper end body of the present application;

[0048] Figure 22 is a sectional view of the carrier seat of the present application;

[0049] in the figure:

[0050] 1 upper housing; 2 middle housing; 3 lower housing;

[0051] 101 cable connection housing; 102 cable connection shaft; 103 lock nut; 104 motor housing one; 1041 positioning groove; 105 heat sink one; 106 drive circuit board one; 107 partition one; 108 rotary transformer one; 109 magnetic steel group one; 110 rotor shaft one; 111 stator lamination group one; 112 magnetic steel sheath one; 113 thrust bearing one; 114 upper end cover; 115 control circuit board one;

[0052] 201 end cover; 202 motor housing two; 203 drive circuit board two; 204 radiator two; 205 partition two; 206 resolver two; 207 stator lamination set two; 208 magnetic steel sleeve two; 209 magnetic steel set two; 210 rotor shaft two; 211 thrust bearing two; 212 inclinator housing; 213 bevel gear; 214 shaft cover; 215 connecting fin; 216 circuit through shaft; 217 hexagonal shaft cover; 218 rotating support shaft, 219 control circuit board two;

[0053] 301 upper end body; 302 carrier seat; 303 transducer; 304 electronic compass. DETAILED DESCRIPTION

[0054] The application is further described below in conjunction with examples. It should be noted that in this document, words such as "upper", "lower", etc. are merely used to facilitate the description of the drawings and do not limit the actual direction in use, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0055] As Figure 1 The application provides a sonar tool for detecting the shape of a salt cavern, comprising a power part, a guide part and a detection part, which are externally provided with a shell 1, a middle shell 2 and a lower shell 3; a permanent magnet motor is arranged in the upper shell 1 to control the horizontal rotation of the middle shell 2 and the lower shell 3, and a permanent magnet motor is also arranged in the middle shell 2 to control the vertical rotation of the lower shell 3.

[0056] As Figures 2 to 9As shown, the upper housing 1 comprises a cable connection shell 101, a cable connection shaft 102, a locking nut 103, a motor shell 104, a radiator 105, a driving circuit board 106, a partition 107, a rotary transformer 108, a magnetic steel group 109, a rotor shaft 110, a stator lamination group 111, a magnetic steel sheath 112, a thrust bearing 113, an upper end cover 114 and a control circuit board 115. The cable connection shaft 102 and the locking nut 103 are installed in the cable connection shell 101 to connect the cable with the housing. The upper part is a stepped hole with a small diameter and is connected with the cable. The lower part is an open structure with internal threads and is connected with the motor shell 104. The upper part of the motor shell 104 is provided with a section of external threads which is connected with the internal threads arranged in the lower part of the cable connection shell 101. The lower part of the motor shell 104 is provided with an inwardly tapered section and a shaft hole. The inner wall of the motor shell 104 is provided with a positioning groove 1041. The motor shell 104 internally accommodates the radiator 105, the rotor shaft 110, the driving circuit board 106, the control circuit board 115 and other devices. The motor shell 104 can also accommodate a pressure compensator, a stabilizer, a controller and other devices.

[0057] As Figure 1 , Figures 10 to 20As shown, the middle shell 2 includes a middle end cover 201, a motor shell two 202, a drive circuit board two 203, a radiator two 204, a partition two 205, a rotary transformer two 206, a stator lamination set two 207, a magnetic steel sleeve two 208, a magnetic steel group two 209, a rotor shaft two 210, a thrust bearing two 211, an inclinator shell 212, a bevel gear 213, a shaft cover 214, a connecting fin 215, a circuit through shaft 216, a hexagonal shaft cover 217 and a control circuit board two 219. The middle end cover 201 has a through hole in the middle, the inner wall of the through hole is threaded, the rotor shaft one 110 passes through the through hole and is fixedly connected by threads; the outer side of the middle end cover 201 is also provided with threads, and the end cover surface is provided with a bolt connection hole, so as to be connected with the motor shell two 202. The motor shell two 202 is a hollow shell, which is threadedly connected with the middle end cover 201 at the top and threadedly connected with the inclinator shell 212 at the bottom; the motor shell two 202 is internally provided with devices such as the radiator two 204, the rotor shaft two 210, the drive circuit board two 203 and the control circuit board two 219. It can also be provided with devices such as pressure compensator, stabilizer, controller, etc. The upper end of the inclinator shell 212 is open, the lower end is arc-shaped, and the arc-shaped surface is preferably arc-shaped chamfered on one side and right-angled chamfered on the other side, the regions where the two ends of the arc-shaped surface are located are provided as planes, and through holes are formed in the two planes; the inclinator shell 212 is internally provided with a rotary support shaft 218, a bevel gear 213, a connecting fin 215, a shaft cover 214 and a circuit through shaft 216. The rotary support shaft 218 is arranged in the through hole on one side of the inclinator shell 212, the bevel gear 213 is arranged on the rotary support shaft 218 and is fixed in the circumferential direction by a key, one end of the rotary support shaft 218 is threaded, and the hexagonal shaft cover 217 is rotatably connected to the end to axially fix the bevel gear 213; the other end of the rotary support shaft 218 is provided with a bolt hole for bolt fixation, and the shaft cover 214 is used for fixation and sealing. The circuit through shaft 216 is arranged in the through hole on the other side of the inclinator shell 212, the circuit through shaft 216 is a hollow shaft, and the circuit enters the next structure through the circuit through shaft 216; the circuit through shaft 216 is provided with a bolt hole for bolt fixation, and the shaft cover 214 is used for fixation and sealing. The connecting fin 215 is two connecting fins, one or more of the two connecting fins are provided with flow channels as circuit through holes. The connecting fin 215 is provided with a bolt hole for bolt fixation, and the shaft cover 214 is connected to fix and seal.

[0058] As Figure 1 , Figures 19 to 20The lower housing 3 includes an upper end body 301, a carrier seat 302, a transducer 303 and an electronic compass 304. The upper end body 301 has an arc-shaped upper end matched with the bottom of the inclinometer housing 212 and a threaded opening at the lower end, leaving a passage for the wire to pass through. The upper end body 301 can also contain a controller, a circuit board and other devices. The carrier seat 302 is connected to the upper end body 301 by threads and has a wire passage in the center. The transducer 303 is used to realize electric-acoustic conversion and is placed in a specific position. The electronic compass is fixed in the internal space of the upper end body 301 by bolts and accurately detects the spatial position of the transducer 303.

[0059] As shown in Figure 4 , specifically, the cable connection housing 101 is a stepped hole structure, connecting the cable and the housing. The cable connection shaft 102 is a hollow cylinder, which is axially penetrated through the through hole of the cable connection housing 101. The outer end of the cable connection housing 101 has threads on the outside, and the outer cable is connected together with the cable connection shaft 102 by threads, and the wire passes through the central through hole.

[0060] In the embodiment as shown in Figure 6 , it also includes a heat sink 105, a drive circuit board 106, a partition 107, an upper end cover 114 and a control circuit board 115. The heat sink 105 is axially penetrated in the motor housing 104, used for heat dissipation of the drive circuit board 106 and the control circuit board 115. The drive circuit board 106 and the control circuit board 115 are fixed by bolts on the flat surface between the wings of the heat sink 105. A through hole is axially penetrated through the cable connection housing 101, the cable connection shaft 102, the locking nut 103, the heat sink 105 and the partition 107.

[0061] As shown in Figure 6 , specifically, the heat sink 105 is a six-wing fin structure, including a hollow cylindrical body and six wings. The hollow cylindrical body is arranged along the axial direction, and the six wings are in contact with the motor housing 104, and the contact surface roughness should be below 0.6-0.8, which is beneficial to heat dissipation. Preferably, the drive circuit board 106 and the control circuit board 115 are fixed by screws on the mounting surface between the wings of the heat sink 105, and six mounting surfaces can be used to install circuit boards as needed. The circuit board and the mounting surface should be coated with thermal conductive silicone grease, which is beneficial to heat conduction. In order to prevent the screws from loosening due to the shock caused by the collision between the instrument and the well wall during the process of lowering into the well, special anti-loose thread glue can be used. The heat generated by the drive circuit board 106 and the control circuit board 115 is transferred to the heat sink 105 in the form of heat conduction, then transferred to the motor housing 104 in the form of heat conduction by the wings, and finally transferred to the external medium in the form of heat radiation or heat convection.

[0062] As shown in Figure 7 ,Figure 8 、 Figure 9 The partition member one 107 is a disc type part, separating the heat sink one 105 and the rotor shaft one 110, and the disc type surface of the partition member one 107 is provided with a through groove for line passing and facilitating heat dissipation. The outer side of the partition member one 107 has a positioning block fixed with the positioning groove 1041 of the inner wall of the upper shell 1, to prevent the partition member one 107 from rotating circumferentially. The rotary transformer one 108 comprises a stator and a rotor, the rotor is installed on the stepped surface of the rotor shaft one 110 through a flat key, and the stator is installed on the inner wall of the partition member one 107. The thrust bearing one 113 is axially installed between the motor shell one 104 and the rotor shaft one 110, for supporting the load of the parts in the upper shell 1.

[0063] In a preferred embodiment, the rotor is a permanent magnet rotor, and both motors in the application are permanent magnet synchronous motors, and the structures such as the heat sink, the rotor shaft, the partition member, the rotary transformer, the stator lamination stack, the magnet steel group, and the thrust bearing are similar.

[0064] The permanent magnet rotor one comprises a magnet steel group one 109 fixed on the rotor shaft one 110 and a sheath one 112 fixed on the outside of the magnet steel group one 109, and the permanent magnet rotor two comprises a magnet steel group two 209 fixed on the rotor shaft two 210 and a sheath two 208 fixed on the outside of the magnet steel group two 209. The magnet steel group two 109 is located between the two steps of the rotor shaft one 110, and the magnet steel group two 209 is located between the two steps of the rotor shaft two 210, and both are spliced by a 10×5 circumferential and axial combination, and a gap is left between each magnet steel, which is separated by a partition strip. Preferably, the magnet steel material can be selected from samarium-cobalt alloy. Before installation, the magnet pole of the magnet steel should be checked to ensure the correct direction, and then the sheath one 112 and the sheath two 208 are installed. The sheath one 112 and the magnet steel group one 109, and the sheath two 208 and the magnet steel group two 209 are all hot assembled with interference fit, for protecting the integrity of the surface of the magnet steel and preventing the magnet steel from falling off accidentally during rotation. There is a gap between the sheath and the stator lamination stack group. Preferably, the sheath material can be selected from Cr18Ni9. The stator lamination stack one 111 and the stator lamination stack two 207 are both formed by stacking a plurality of stator laminations, each stator lamination adopts a fractional slot structure, 10-pole 12-slot, and the outer side of the stator lamination has a positioning block fixed with the positioning groove 1041 of the inner wall of the upper shell 1, to prevent the stator lamination from rotating circumferentially. The winding adopts short-pitch single-layer winding, and should use insulating material polyimide.

[0065] The permanent magnet motor comprises a magnetic steel group 109, a rotor shaft 110 and a stator lamination group 111.

[0066] In the application, the permanent magnet synchronous motor is used, which has high efficiency, fast start, large torque, accurate control of rotation angle, direct driving of load, no reducer, simple structure and adaptability to various downhole working conditions.

[0067] As shown in Figure 1 In the embodiment, the permanent magnet motor is used in cooperation with a resolver 108, a resolver 206 and a driving control system. The resolver 108 and the resolver 206 are respectively sleeved outside the rotor shaft 110 and the rotor shaft 210, and the inner ring of the resolver is coaxially connected with the rotor shaft, for detecting the rotation position signal of the rotor (i.e. the angle of the rotor shaft). The driving control system comprises a driving circuit board and a control circuit board, which are connected with the ground computer through a cable, for receiving and transmitting signals; the control circuit board transmits a control signal to the driving circuit board, and the driving circuit board controls the start-stop, rotation speed and rotation direction of the motor.

[0068] In the application, the use of direct current greatly reduces the capacitive effect of electric energy, which is beneficial to the number of effective cables and improves the reliability of the motor. The ground transmits high-voltage direct current to the motor driving system, generates a control signal through the driving circuit board, transmits the control signal to the stator through the wire, and realizes the start-stop and rotation number control of the motor; the inner ring of the resolver is coaxially connected with the rotor shaft, for detecting the rotation position of the rotor shaft and the magnetic steel, generating a position signal and transmitting it to the driving circuit board and the ground computer, for accepting the next instruction.

[0069] The driving control system in the application can transmit the state signal of the motor operation to the ground computer in real time, which is beneficial to improving the accuracy and working efficiency of the sonar measurement.

[0070] As shown in Figure 16 The lower shaft end of the rotor shaft 210 is a bevel gear structure, which is engaged with a bevel gear 213, and the rotation of the rotor shaft 210 drives the bevel gear 213 and the rotation support shaft 218 to rotate, so that the lower housing 3 rotates vertically around the rotation support shaft as the rotation center.

[0071] As shown in Figure 1As shown, the upper shell 104 and the rotor shaft one 110, the middle shell 202 and the rotor shaft two 210 are sleeved with the thrust bearing one 113 and the thrust bearing two 211, and the load is transmitted to the shell by the bearing. In the present application, the sealing ring is used as one of the sealing protection devices. Among them, the upper shell 104 and the rotor shaft one 110, the upper end cover two 201 and the rotor shaft one 110, and the middle shell 202 and the rotor shaft two 210 are all used as the rotating shaft sealing piece. The combination sealing of the tooth-shaped slip ring type can adapt to the high temperature and high pressure downhole environment, has the advantages of long service life, low friction, no leakage and simple structure and strong adaptability; the O-shaped sealing ring is used between the rotating support shaft 218 and the inclinometer housing 212, and the line through shaft 216 and the inclinometer housing 212, and the reliability of the sealing is strengthened. Preferably, the material can be fluorine rubber sealing ring or nitrile rubber sealing ring, so as to ensure that the motor can work reliably in high temperature and high pressure environment.

[0072] Through the above structural design, the effect of keeping the device horizontal rotation and end swing rotation can be realized, and the whole system structure is flexible, the sealing is perfect, the operation is convenient, the detection is efficient, and the detection effect in specific terrain and stratum environment can be effectively improved.

[0073] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belong to the improvement of the present application.

Claims

1. A sonar tool for detecting the shape of a salt cavern cavity comprising a power section, a guide section, a detection section, characterized in that, The power part includes two groups of motors, the guide part includes a rotating component, and the detection part includes a sonar; the power part is used to provide power for tool steering and detection, the guide part is used to drive the detection part to steer, and the detection part is used to send and receive sound waves for detection; The two groups of motors are permanent magnet motors, namely permanent magnet motor one and permanent magnet motor two, which are arranged in two sets of housings arranged above and below and connected together, and the two sets of housings are respectively an upper housing (1) and a middle housing (2); a lower housing (3) is arranged below the middle housing (2); a part of the rotating component is arranged in the middle housing (2), and another part is separately arranged on the lower side of the middle housing (2), which is an upper end body (301) of the lower housing (3), and a carrier seat (302) is further arranged on the lower side of the lower housing (3); the permanent magnet motor one is used to drive the middle housing (2) to rotate circumferentially along the upper housing (1), and the permanent magnet motor two is used to drive the lower housing (3) to rotate axially offset relative to the middle housing (2); A cable is arranged in the upper housing (1), the cable is connected to the top of the upper housing (1) and extends into the upper housing (1), a plurality of drive circuit boards and control circuit boards are arranged in the upper housing (1) and the middle housing (2), and the cable is in contact with the drive circuit boards and the control circuit boards; The drive circuit board one (106) and the control circuit board one (115) are arranged in the upper housing (1), and the permanent magnet motor one is arranged below the drive circuit board one (106) and the control circuit board one (115); the drive circuit board two (203) and the control circuit board two (220) are arranged in the middle housing (2), and the permanent magnet motor two is arranged below the drive circuit board two (203) and the control circuit board two (220); A partition piece is arranged between the drive circuit board one (106), the control circuit board one (115) and the permanent magnet motor one as a partition piece one (107), and a partition piece is arranged between the drive circuit board two (203), the control circuit board two (220) and the permanent magnet motor two as a partition piece two (205); The partition piece one (107) is a disc-shaped part with a hole in the middle, and annular convex edges perpendicular to the disc-shaped surface are arranged on the outer side of the disc-shaped surface and the outer side of the hole; a plurality of through grooves are arranged on the disc-shaped surface of the partition piece one (107); a plurality of protruding positioning blocks are arranged on the outer periphery of the annular convex edge of the outer side of the partition piece one (107); corresponding positioning grooves (1041) are arranged on the inner wall of the upper housing (1) to fix the positioning blocks and then fix the partition piece one (107); the partition piece two (205) has the same structure and mounting mode as the partition piece one (107). The rotating transformer one (108) is installed below the partition one (107), which contains the stator one and the rotor one. The rotor one is a ring-shaped structure with a hole, and the rotor shaft one (110) is connected in the hole. The bottom of the rotor shaft one (110) penetrates the bottom of the upper shell (1) and extends to the inside of the top of the middle shell (2) and is fixed. The bottom of the rotor shaft two (210) penetrates the step of the bottom area of the middle shell (2) and extends downward. The end is provided with a structure connected with the rotating part to realize the movement of the rotating part. The inside of the upper and lower ends of the rotor shaft one (110) is provided with a protruding step. The rotor one is installed on the step surface of the rotor shaft one (110) by a flat key. The stator one is installed on the inner wall of the partition one (107). The bottom of the upper shell (1) is provided with an inwardly extending reduced diameter section. The thrust bearing is provided on the reduced diameter section as the thrust bearing one (113). The step of the bottom of the rotor shaft one (110) is placed on the thrust bearing one (113) and realizes rotation. The rotating transformer two (206) is installed below the partition two (205), which contains the stator two and the rotor two. The rotor two is a ring-shaped structure with a hole, and the rotor shaft two (210) is connected in the hole. The inside of the upper and lower ends of the rotor shaft two (210) is provided with a protruding step. The rotor two is installed on the step surface of the rotor shaft two (210) by a flat key. The stator two is installed on the inner wall of the partition two (205). The middle shell (2) is provided with an inwardly extending reduced diameter section near the bottom. The thrust bearing is provided on the reduced diameter section as the thrust bearing two (211). The step of the bottom of the rotor shaft two (210) is placed on the thrust bearing two (211) and realizes rotation. The upper ends of the partition one (107) and the partition two (205) are respectively provided with the heat sink one (105) and the heat sink two (204). The heat sink one (105) is a circular simple structure with external radiation fins. The driving circuit board one (106) and the control circuit board one (115) are installed on the outer wall of the cylinder. The radiation fins act as wings and contact the inner wall of the motor housing one (104). The upper shell (1) includes the cable connection housing (101) and the motor housing one (104). The cable connection housing (101) is fixed above the motor housing one (104). The outside of the cable connection housing (101) is two sections with small top and large bottom. The inside is also provided with multiple steps. The cable connection shaft (102) with steps on the outer side of the bottom is installed in the cable connection housing (101). The cable connection shaft (102) is fixed on the steps in the cable connection housing (101) through the steps. The cable connection shaft (102) is provided with a locking nut (103) for fixing from the other end to ensure that the cable connection shaft (102) can be fixed on the cable connection housing (101). The stator one and the stator two are stator lamination sets, respectively stator lamination set one (111) and stator lamination set two (207), the rotor one and the rotor two are magnetic steel groups, respectively magnetic steel group one (109) and magnetic steel group two (209), the magnetic steel group one (109) and the magnetic steel group two (209) are respectively provided with the sheath one (112) and the sheath two (208) outside.

2. The sonar tool for detecting the shape of a salt cavern according to claim 1, wherein, The middle shell (2) includes a middle end cover (201) and a motor shell two (202), the middle end cover (201) is fixed on the upper end of the motor shell two (202), the inner side of the middle end cover (201) is fixed with the rotor shaft one (110), when the rotor shaft one (110) rotates, the middle shell (2) is rotated; The bottom of the rotor shaft two (210) is provided with a cylindrical gear face; The bottom of the motor shell two (202) is fixedly connected with an inclinator shell (212), the inclinator shell (212) is internally provided with an upper end opening and a lower end arc section, two planes are arranged on the side surface of the arc section of the inclinator shell (212), each of the planes is provided with a through hole, a rotating support shaft (218) is arranged in one of the through holes, a bevel gear (213) is fixed on the inner side of the rotating support shaft (218), the bevel gear (213) is engaged with the bevel gear face of the rotor shaft two (210), a connecting wing (215) is arranged on the outer side of the rotating support shaft (218), the connecting wing (215) is in a long strip shape and is provided with two round holes, one of the round holes is fixed on the outer side of the rotor shaft two (210), and the other round hole is used for connecting the lower shell (3); a circuit through shaft (216) is arranged in the other through hole, the circuit through shaft (216) is a hollow shaft, the inner side of the circuit through shaft (216) is fixed on the inner wall of the inclinator shell (212), and the outer side of the circuit through shaft (216) is used for fixedly connecting the connecting wing (215); a small hole is arranged on the side wall of the circuit through shaft (216) close to the outer side, a channel is arranged in the connecting wing (215) corresponding to the small hole, and the other end of the channel is provided with an opening penetrating the wall surface of the connecting wing (215), and the opening is connected to the inside of the lower shell (3).

3. The sonar tool for detecting the shape of a salt cavern according to claim 2, wherein, The lower shell (3) is divided into an upper end body (301) and a carrier seat (302), the upper end body (301) is provided with a space connected to the opening of the connecting wing (215) on the upper portion and a space used for placing an electronic compass (304) on the lower portion; the bottom of the upper end body (301) is fixed with the top of the carrier seat (302), a main channel and a plurality of branch channels are arranged in the carrier seat (302), and a transducer (303) is arranged at the tail end of each branch channel, the circuit of the transducer (303) passes through the branch channel, the main channel, the upper end body (301) and the connecting wing (215) and then extends upwards.

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