CN114687733B - Sound wave logging integrated receiving acoustic system structure with cooling module - Google Patents

Abstract

The invention discloses a sound wave logging integrated receiving sound system structure with a cooling module, which comprises an integrated receiving sound system arranged in a sound wave logging instrument string; the capsule in the integrated receiving acoustic system is arranged in the mechanical shell; the receiving station is arranged in the capsule and is respectively connected with the upper interface joint and the lower interface joint through the mechanical coupling block; the upper interface end is connected with the upper conversion connecting joint, and the lower interface end is connected with the lower conversion connecting joint; the receiving transducer in the receiving station is mounted on the outer surface of the receiving station frame, and the electronics module and cooling module are mounted within the frame of the receiving station frame by the positioning module. The invention solves the cooling problem of the distributed electronic circuit module in the liquid-filled pressure-bearing integrated receiving acoustic system, and can ensure that the electronic circuit in the acoustic system works in an environment below a specific temperature for a long time, thereby obviously enhancing the capability and reliability of the integrated acoustic system working for a long time under the condition of ultra-high temperature cable logging and improving the success rate of acoustic logging operation in ultra-deep high-temperature wells.

Description

An acoustic logging integrated receiver acoustic structure with cooling module

technical field

The invention belongs to the technical field of sonic logging, in particular to an sonic logging integrated receiving acoustic system structure including a cooling module.

Background technique

Sonic logging is an important logging method, which judges the geological properties of the formation and the engineering conditions of the borehole by measuring the acoustic properties of the borehole wall or the medium beside the borehole. This technology has important applications and broad prospects in fine reservoir description and stimulation, wellbore engineering condition evaluation, and geosteering while drilling.

Sonic logging tools are tools for sonic logging data acquisition and bridges between geophysical logging methods and interpretation applications. Sonic logging tools are becoming more and more complex and their functions are more integrated. The acoustic logging receiving acoustic system is gradually upgraded from the monopole receiving method to the multipole, arrayed, and azimuth receiving acoustic system, which can realize the acoustic signal reception under different azimuths, different source distances and different distances, and conduct comparative verification and array. Chemical imaging, in order to increase the resolution and reliability of instrument imaging, and improve the three-dimensional detection characteristics of the instrument.

The new wireline acoustic logging integrated receiving sound system is based on the capsule liquid-filled pressure structure, adopts the modularization and integrated design ideas, and includes multiple relatively independent modular receiving stations. In the sound system, the positions of electronic circuits and heat sources are obviously distributed, and components with high integration, high operating frequency and high power consumption (such as MOS tubes, power chips, FPGA, DSP, etc.) generate more heat. In the middle and late stages of high-temperature well logging, the heat production of electronic devices makes the temperature of the silicone oil inside the capsule (especially at the heat-generating electronic components) higher than the temperature of the wellbore fluid outside the capsule, and can only reach the outside of the capsule in the way of liquid coupling temperature difference gradient. Heat dissipation, cooling effect is limited. At this time, the temperature around the electronic components will be much greater than the rated operating temperature of the components. This will greatly affect the performance of the device or even completely destroy it, resulting in instrument failure. This situation occurs more frequently when logging in deep wells, ultra-deep wells or geothermal wells with high geothermal gradients (temperatures up to 300°C or more), which seriously affects the success rate and efficiency of logging operations.

In view of the current situation and trend that the temperature of the internal environment (inside the capsule) and the temperature of the external environment (outside the capsule) in the integrated sound system are constantly increasing, it is difficult to solve the problem of electronic circuits only by relying on the current high-temperature aging method of screening components. high temperature resistance. It is urgent to design an integrated receiving acoustic system for acoustic logging with a cooling module to reduce the working environment temperature of the electronic components in the acoustic system, so that the integrated acoustic system can work in the high temperature environment at the bottom of the well for a long time, so as to better perform logging. Well service.

SUMMARY OF THE INVENTION

The purpose of the present invention is to aim at the above-mentioned deficiencies in the prior art, to provide a sound logging integrated receiving sound system structure with a cooling module, so as to solve the problem that the working environment temperature of the electronic circuit in the integrated receiving sound system is high and its own liquid coupling The problem of the limited cooling effect of the temperature difference heat dissipation method.

In order to achieve the above object, the technical scheme that the present invention takes is:

An acoustic logging integrated receiving acoustic system structure including a cooling module, which comprises an integrated receiving acoustic system arranged in an acoustic logging instrument string;

The integrated receiving sound system includes a mechanical housing, a capsule, at least one receiving station, an upper interface end, a lower interface end, a mechanical coupling block, an up-conversion connector and a down-conversion connector;

The capsule is arranged in the mechanical shell; the receiving station is arranged in the capsule, and is respectively connected with the upper interface end and the lower interface end through the mechanical coupling block; the upper interface end is connected with the upper conversion connector, and the lower interface end is connected with The down conversion connector is connected;

The receiving station includes a receiving station frame, two sets of receiving transducers, a positioning module, an electronic circuit module and a cooling module; the two sets of receiving transducers are installed on the outer surface of the receiving station frame, and the electronic circuit module and the cooling module are installed through the positioning module. In the frame of the receiving station skeleton.

Further, the mechanical coupling block realizes the connection between the upper interface end and the receiving station and between the lower interface end and the receiving station through the clamping slot, and is fixed by the open spring coil.

Further, each group of receiving transducers includes 8 receiving transducers, and the 8 receiving transducers are arranged at an interval of 45° in the circumferential direction of the integrated receiving sound system, and the receiving transducers and the sound-transmitting window on the mechanical housing are in The positions in the circumferential direction correspond one-to-one;

The signal line of the receiving transducer is connected to the circuit board through the first wire hole on the receiving station frame, the second wire hole on the limit bolt and the third wire hole on the electronic circuit frame; the circuit board passes through the second wire hole. The screws are mounted on the electronic circuit skeleton.

Further, the positioning module includes two limit blocks, limit bolts and limit nuts;

Two limit blocks are installed on the inner side of the receiving station frame; one side of the limit bolt is connected with the limit block, and the other side is connected with the electronic circuit frame, so as to fine-tune the position of the cooling module and the electronic circuit module in the axial direction of the receiving station.

Further, the cooling module includes an insulating chamber and a cooler;

The insulating chamber is fixed on the frame of the electronic circuit through the limit nuts on both sides, and the cooler is installed on the insulating chamber through the third screw; the frame of the electronic circuit is positioned in the frame of the receiving station through the limit block and the limit bolt, and the two The end is provided with a wire-passing and liquid-passing passage communicating with the outside of the adiabatic chamber;

The adiabatic chamber includes an adiabatic chamber main body and two adiabatic chamber doors; the adiabatic chamber doors are in close contact with the adiabatic chamber main body through a limit nut.

Further, the cross section of a part of the electronic circuit frame inside the insulating chamber is square to install 4 analog channel boards; the control board in the insulating chamber is fixed in the middle of the electronic circuit frame to control 8 analog channel boards.

Further, the cooler is installed on two installation planes in the axial middle of the adiabatic chamber and at a circumferential interval of 180°; the hot end of the cooler is installed on the outside of the adiabatic chamber, and the cold end of the cooler is installed on the inside of the adiabatic chamber; the cooler is independent type cooler; a plurality of freestanding coolers are cascaded and packaged to form a cascaded cooler; a cooling module includes at least one freestanding cooler and at least one cascaded cooler; freestanding coolers and cascaded cooling The chiller is controlled by the chiller control module in the receiving station.

Further, the upper interface end and the lower interface end are fixed on the mechanical casing through the first screw, and the upper interface end and the lower interface end are both provided with circulating oil holes; It is fixedly connected with the lower interface end.

Further, the upper conversion connector includes an upper adapter body and 3 female connectors; the outer part of the upper adapter body is a mechanical cylinder, and a sealed pressure-bearing connector is integrated inside it; the mechanical cylinder is provided with a groove-type contact surface. , the grooved contact surface is matched with perfluoroelastomer O-rings to achieve sealing between the upper conversion connector and the upper interface end;

The female connector is fixed at the axial position of the conversion connector by a circular circlip and a positioning pin; in the upper conversion connector, one female connector is installed on the right side of the sealed pressure-bearing connector, and the other two female connectors The connector is installed on the left side of the sealed pressure-bearing connector to convert the electrical male head of the sealed pressure-bearing connector into an electrical female head and serve as the external electrical interface of the integrated receiving sound system.

Further, the sonic logging tool string includes an anti-rotation sub-section, a telemetry sub-section, a main control sub-section, an integrated receiving sound system, a sound insulator and an integrated emission sound system, which are arranged in sequence from top to bottom; The wall contacts are connected; the telemetry sub is connected to the ground system and the main control sub respectively; the main control sub receives the ground commands transmitted by the telemetry sub to control the work of the transmitting sound system and the receiving sound system; the transmitting sound system is integrated with a monopole ion and dipole sound sources;

The acoustic logging instrument string is connected to one end of the cable, and the other end of the cable is connected to the logging vehicle on the ground across the pulley on the derrick.

The acoustic logging integrated receiving acoustic structure with cooling module provided by the present invention has the following beneficial effects:

The invention constructs a partial thermal insulation room in the receiving station of the integrated receiving sound system and installs the electronic circuit in it, and quickly transfers the heat generated by the electronic circuit to the outside of the thermal insulation room through the silicone oil liquid and two kinds of coolers, without adding a short section. Without damaging the modular structure of the sound system, it solves the cooling problem of the working environment of the distributed electronic circuit modules in the direct pressure integrated receiving sound system, and can ensure that the electronic circuits in the sound system work below a specific temperature for a long time ( It can significantly enhance the ability and reliability of the integrated acoustic system to work for a long time under ultra-high temperature wireline logging conditions, and improve the success rate and efficiency of sonic logging operations in ultra-deep and high-temperature wells.

Description of drawings

Figure 1 is a schematic diagram of the construction site of wireline acoustic logging.

Figure 2 is a front view of the integrated receiving sound system.

FIG. 3 is a cross-sectional view at A-A in FIG. 2 .

FIG. 4 is a cross-sectional view at B-B in FIG. 2 .

FIG. 5 is a cross-sectional view at C-C in FIG. 2 .

Among them, 10, ground; 11, logging vehicle; 12, cable; 13, derrick; 14, sonic logging instrument string; 15, wellbore; 16, formation; 17, geological body beside the well;

131, pulley; 141, anti-rotation sub joint; 142, telemetry sub joint; 143, main control sub joint; 144, integrated receiving sound system; 145, sound insulator; 146, integrated transmitting sound system; 151, casing well section; 152, open-hole section; 153, wellbore; 181, gliding wave; 182, reflected wave;

20. Mechanical shell; 21. Ribbon sound-transmitting window; 22. Sound insulation groove; 23. The first screw;

30. Capsule; 31. Cable tie;

40, receiving station; 41, receiving station frame; 42, receiving transducer; 43, positioning module; 44, electronic circuit module; 45, cooling module;

411, first wire hole; 431, limit block; 432, limit bolt; 433, limit nut; 434, second wire hole; 435, local wire channel; 436, through wire channel; 441, electronic circuit skeleton; 442, circuit board; 443, second screw; 444, third wire hole; 445, analog channel board; 446, control board; 451, adiabatic chamber; 452, cooler; 4521, hot end; 4522, cold 453, the third screw; 454, the main body of the insulating chamber; 455, the door of the insulating chamber; 456, the independent cooler; 457, the cascade cooler;

50. Upper interface end; 51. First protective cap; 52. Circulating oil hole;

60. The lower interface end; 61. The second protective cap;

70. Mechanical coupling block; 71. Open spring coil;

80, the upper conversion connector; 81, the main body of the upper adapter; 82, the female connector; 83, the mechanical cylinder; 84, the sealed pressure bearing connector; 85, the perfluoro rubber O-ring; 86, the circular circlip; 87. Positioning pin; 88. Positioning tongue;

90. The lower conversion connector; 91. The main body of the lower conversion connector; 92. The positioning groove.

Detailed ways

The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments, and all inventions and creations utilizing the concept of the present invention are included in the protection list. For those skilled in the art, as long as various changes (these changes are obvious) fall within the spirit and scope defined and determined by the claims of the present invention, they are all included in the protection of the present invention.

According to an embodiment of the present application, referring to FIG. 1 , the sonic logging integrated receiving acoustic system structure including the cooling module of the present solution includes an integrated receiving acoustic system 144 arranged in the acoustic logging tool string.

Referring to Figure 2, the integrated receiving sound train 144 includes a mechanical housing 20, a capsule 30, at least one receiving station 40, an upper interface tip 50, a lower interface tip 60, a mechanical coupling block 70, an up-conversion connector 80, and a down-conversion connector 90.

The capsule 30 is arranged in the mechanical housing 20; the receiving station 40 is arranged in the capsule 30, and is connected to the upper interface end 50 and the lower interface end 60 through the mechanical coupling block 70 respectively; the upper interface end 50 and the upper conversion connector 80 To connect, the lower interface terminal 60 is connected to the lower conversion connector 90 .

The integrated receiving sound system 144 in this embodiment solves the cooling problem of the working environment of the distributed electronic circuit modules in the sound system, and can ensure that the electronic circuits in the sound system work in an environment below a specific temperature (lower than the wellbore fluid temperature) for a long time, Therefore, the ability and reliability of the integrated acoustic system to work for a long time under the condition of ultra-high temperature wireline logging are significantly enhanced, so that the acoustic system can be better applied in the three-dimensional acoustic logging of ultra-high temperature and ultra-deep wells. In addition, the integrated acoustic system can reduce the length of the tool and realize the local acquisition of signals, which is beneficial to improve the signal-to-noise ratio of weak signal acquisition in remote detection logging.

The various components of the integrated receive sound train 144 will be described in detail below:

In this embodiment, the mechanical casing 20 is made of stainless steel or titanium alloy, and the mechanical casing 20 is provided with a belt-shaped sound-transmitting window 21 along the axial direction of the acoustic system to ensure the sound-transmitting effect between the acoustic wave transducer and the wellbore fluid; 20 is also provided with a circular arc-shaped sound insulation groove 22 along the circumferential direction of the acoustic system, and the circular arc-shaped sound insulation groove 22 is used to reduce the interference of the direct wave of the instrument shell to the useful signal. The use of the sound-transmitting window 21 and the sound-insulating groove 22 makes the mechanical housing 20 unable to serve as a pressure-bearing sealing structure for isolating the wellbore fluid pressure and protecting the internal electronic circuit.

In this embodiment, the capsule 30 is made of materials resistant to gases such as hydrogen sulfide, so as to protect the internal electronic circuit from being corroded by the gas in the well.

The receiving station 40 in this embodiment includes a receiving station frame 41 , a receiving transducer 42 , a positioning module 43 , an electronic circuit module 44 and a cooling module 45 .

Referring to FIG. 3 , each receiving station 40 includes two groups of receiving transducers 42 , and each group of receiving transducers includes 8 receiving transducers 42 , all of which are installed on the outer surface of the receiving station frame 41 . The eight receiving transducers 42 in each group are arranged at intervals of 45° in the circumferential direction of the acoustic system, and are used to receive acoustic signals from different directions of the formation and convert them into electrical signals. The positions of the sound-transmitting windows 21 on the mechanical housing and the receiving transducers 42 in the circumferential direction correspond one-to-one. 2, the electronic circuit module 44 and the cooling module 45 are installed within the frame of the receiving station frame 41 through the positioning module 43. The cooling module 45 and the electronic circuit module 44 are an inseparable whole in space and machinery; but the two The relative position of the operator in the circumferential direction is adjustable.

The integrated structure of the receiving station 40 in this embodiment not only reduces the length of the acoustic system, improves the signal-to-noise ratio of weak signal acquisition, but also has a cooling function, so that it can be better applied to remote detection acoustic logging of high temperature wells.

The signal wire of the receiving transducer 42 is connected to the receiving station through the first wire hole 411 on the receiving station frame 41, the second wire hole 434 on the limit bolt 432 and the third wire hole 444 on the electronic circuit frame 441. on circuit board 442. There is a section of local wire channel 435 in the center of the limiting bolt 432 for passing the electrical connection wires between the receiving station 40 and the upper interface terminal 50 , the lower interface terminal 60 and the adjacent receiving stations 40 . In addition, there are circular through-wire channels 436 on the two limit blocks 431, which are used for connecting wires used by lower modules, sub-sections or instruments outside the insulation chamber 451 but not used by the receiving station 40, such as 220V AC wires and CAN bus, etc.

The positioning module 43 includes a limit block 431 , a limit bolt 432 and a limit nut 433 . The electronic circuit module 44 includes an electronic circuit frame 441 and a circuit board 442 , and the cooling module 45 includes an adiabatic chamber 451 and a cooler 452 .

The two limiting blocks 431 in the positioning module 43 are installed on the inner side of the receiving station frame 41 in the form of baffles to limit the axial range of the cooling module 45 and its internal electronic circuit module 44 in the receiving station 40 . One side of the limit bolt 432 is connected with the limit block 431 , and the other side is connected with the electronic circuit frame 441 , for fine-tuning the position of the cooling module 45 and the electronic circuit module 44 in the axial direction of the receiving station 40 . The insulating chamber 451 is fixed on the electronic circuit frame 441 by the limiting nuts 433 on both sides, and the cooler 452 is mounted on the insulating chamber 451 by the third screw 453 . Both ends of the electronic circuit skeleton 441 are provided with wire-passing and liquid-passing passages that communicate with the outside of the insulating chamber 451 , and the middle is a solid body. The circuit board 442 is mounted on the electronic circuit frame 441 by the second screws 443 .

The electronic circuit in this embodiment realizes the functions of sampling, amplifying, filtering, AD conversion, and bus communication of the signals of the multi-channel receiving transducers 42 . The electronic circuit module 44 cooperates with the receiving transducer 42 to realize the acquisition of acoustic logging signals. In addition, the electronic circuit also includes a cooler control module to control the operation of the cooler and create a local low temperature environment for the electronic circuit to work.

The cooling module 45 is used to reduce the ambient temperature near the electronic circuit, so that it works under a lower temperature condition, thereby improving the high temperature resistance performance of the sound system.

Specifically, referring to FIG. 2 , the cooling module 45 is installed within the frame of the receiving station frame 41 , including the insulating chamber 451 and the cooler 452 .

The insulating chamber 451 is fixed on the electronic circuit frame 441 by the limit nuts 433 on both sides thereof, and the cooler 452 is mounted on the insulating chamber 451 by the third screw 453 . The electronic circuit frame 441 can be made of aluminum material to reduce weight, and is positioned within the range of the receiving station frame 41 through the limit block 431 and the limit bolt 432 . The circuit board 442 is placed in the insulating chamber 451 and fixed on the electronic circuit frame 441 by the second screws 443 . It can be seen that the cooling module 45 and the electronic circuit module 44 have been integrated into an inseparable whole both spatially and mechanically. It should be noted that the relative positions of the cooling module 45 and the electronic circuit module 44 in the circumferential direction can be adjusted.

The insulating chamber 451 is used to construct a local insulating space for placing electronic circuits in the internal environment. On the one hand, it reduces the scope of action of the cooling module 45, and on the other hand, it prevents the heat exchange between the inside and the outside of the insulating chamber 451, so that the cooling module 45 mainly acts on the heat generated by the electronic circuit and reduces the required cooling power.

The insulating chamber 451 is made of materials with low thermal conductivity such as 1Cr18Ni9Ti, and is made of a vacuum structure, and its inner and outer surfaces are plated with insulating paint.

The adiabatic chamber 451 is composed of an adiabatic chamber main body 454 and two adiabatic chamber doors 455, wherein the adiabatic chamber doors 455 are in close contact with the adiabatic chamber main body 454 under the action of the limiting nut 433, thereby forming a relatively sealed adiabatic environment. The two insulating chamber doors 455 can be disassembled, which facilitates the smooth insertion and removal of the electronic circuit module 44 . On the one hand, the first wire hole 411 , the second wire hole 434 , the third wire hole 444 and the local wire channel 435 can pass the signal between the receiving transducer 42 and the receiving station 40 and between the adjacent receiving stations 40 . On the other hand, the communication between the inside and the outside of the insulating chamber 451 is realized, thereby ensuring that the insulating chamber is also in an oil-filled direct pressure environment, which greatly reduces the mechanical strength requirements and engineering difficulty of the insulating chamber. However, the existence of the first wire-passing hole 411 , the second wire-passing hole 434 , the third wire-passing hole 444 and the local wire channel 435 will speed up the heat exchange between the inside and outside of the insulating chamber 451 , which is not conducive to the cooling of the insulating indoor space. Therefore, on the premise that the signal line connection and the internal and external communication of the insulating chamber 451 are satisfied, the size of these holes should be reduced as much as possible. In addition, in order to further reduce the amount of heat exchange inside and outside the adiabatic chamber 451, the global connection wires that are not used in the receiving station 40 but used in other parts of the sound system or the whole string of instruments are arranged in the through-wire channel 436 outside the adiabatic chamber 451, which can be It is convenient to assemble and disassemble the electronic circuit module 44 and the cooling module 45 in the receiving station 40 .

Referring to FIG. 4 , which is a B-B cross-sectional view within the insulating chamber 451 at the simulated channel plate 445 . The receiving station frame 41 here is discontinuous in the circumferential direction, only two places separated by 180° are mechanically connected entities, and other places are blank. This not only reduces the weight of the receiving station frame 41 , but also facilitates the installation and debugging of the electronic circuit module 44 and the cooling module 45 . Inside the insulating chamber 451 , the cross-section of the electronic circuit frame 441 can be of different shapes to facilitate the installation of the circuit board 442 . Square in this example, 4 analog channel boards 445 can be installed to process the signals of 8 transducers. It should be noted that there are also 4 analog channel plates 445 on the right side inside the insulating chamber 451 to process signals of another group of 8 transducers.

Referring to FIG. 5 , which is a C-C cross-sectional view at the control plate 446 in the acoustic insulation chamber 451 . In order to better install the cooler 452, the insulating chamber 451 includes two installation planes (as shown in FIG. 2) at 180° intervals. The control board 446 is fixed on the electronic circuit frame 441, and includes two functions of acquisition control and cooler control. On the one hand, the control board controls the work of 8 analog channel boards 445, and communicates with the main control board in the main control short section 143 to realize the functions of receiving commands and uploading data. On the other hand, it selects the type and number of coolers 452 according to the temperature difference between the adiabatic chamber 451 and the wellbore 15 environment, so that the sound system adapts to the wellbore 15 environment of different temperatures, especially the extreme high temperature well. It should be noted that the circumferential relative orientation of the cooler 452 and the control plate 446 can be adjusted.

Referring to FIG. 2 , the cooler 452 is installed on two installation planes in the axial middle of the insulating chamber 451 and at a circumferential interval of 180°. The cooler 452 is a thermoelectric cooler based on the Peltier effect. During installation, the hot end 4521 (the heat-releasing side) of the cooler 452 is installed outside the insulating chamber 451 , and the cold end 4522 (the heat-absorbing side) is installed inside the insulating chamber. After being energized, the cold end 4522 of the thermoelectric cooler absorbs the heat in the adiabatic chamber 451 and transfers it to the hot end 4521, and then discharges it to the environment within the acoustic system.

The cooler 452 includes an independent cooler 456, and a plurality of the independent coolers 456 are cascaded and packaged to form a cascaded cooler 457 capable of making a larger temperature difference between the hot end and the cold end.

The cooling module 45 in this embodiment preferably includes both an independent cooler 456 and a cascaded cooler 457, wherein the latter can provide a lower temperature working environment for the electronic circuit. In addition, the cooling module 45 may use a plurality of coolers 452, on the one hand to improve the cooling power, and on the other hand some of the coolers 452 are used as backup to improve the reliability of the cooling module 45 by means of hardware redundancy. In the specific integrated receiving sound system 144, the working manner and number of the coolers 452 are determined by the cooler control module. In this way, the cooling module 45 can simultaneously consider both the cooling power and extreme high temperature resistance.

The cooler control module has two functions of temperature measurement and operation control of the cooler 452 . By monitoring the temperature in the adiabatic chamber 451 in real time and comparing it with the ambient temperature of the well, it controls which coolers 452 work in the cooling module 45 and the number of them, so as to ensure the cooling effect. For example, when the well ambient temperature is not much higher than the rated operating temperature of the circuit board 442 (such as 150°C), the cooling module 45 can use one or more independent coolers 456 to work to provide greater cooling power; When the temperature is much higher than the rated operating temperature of the circuit board 442 (exceeds the rated temperature difference between the hot end 4521 and the cold end 4522 of the independent cooler 456), the independent cooler 456 cannot stabilize the temperature in the insulating chamber 451 to the circuit board 442 below the rated operating temperature. The use of cascading coolers 457 can maintain a higher temperature difference between the inside and outside of the adiabatic chamber, thereby enabling the sound system to operate at extremely high temperatures, such as above 230°C. This will greatly improve the high temperature resistance of the integrated acoustic system and improve the operational capability of the acoustic logging tool.

The upper interface end 50 and the lower interface end 60 have similar structures and functions, and are used in pairs to provide external mechanical, internal coupling fluid and internal environment sealing interfaces. The upper interface end 50 appears as a mechanical male head to the outside, and the lower interface end 60 appears as a mechanical female head to the outside. When the sound system is stored separately, the corresponding first protective cap 51 and the second protective cap 61 need to be installed on the interface end. The upper interface end 50 and the lower interface end 60 are fixed on the mechanical housing 20 by the first screw 23 to improve the mechanical strength of the sound system, and the circulating oil holes 52 on the two interface ends provide internal coupling fluid (silicon oil, etc.) The two ends of the capsule 30 are fixed on the two interface ends by the tie 31 to realize the sealing function. In addition, upper interface head 50 and lower interface head 60 provide a mechanical transition for the connection between receiving station 40 and up conversion connector 80 and down conversion connector 90 .

The mechanical coupling block 70 can be composed of two glass fiber reinforced plastic blocks, which connect the receiving station 40 with the upper interface end 50 and the lower interface end 60 by way of clamping grooves, and are reinforced by the opening spring ring 71 to ensure the two. The connection between them is reliable and the reference orientation is consistent. In addition, the mechanical coupling block 70 can also connect adjacent receiving stations 40 to form an array azimuth receiving acoustic system including a plurality of receiving stations 40 .

The up-conversion connector 80 and the down-conversion connector 90 are used in pairs. On the one hand, it realizes the standardization of the connection interface between the acoustic sub-section and other sub-sections (the main control sub-section 143, the sound insulator 145, etc.); It plays an important role in the sealed interior environment of the sound system. The up conversion connector 80 externally appears as an electrical female connector, while the down conversion connector 90 externally represents an electrical male connector.

The up-converter connector 80 is composed of an up-converter body 81 and three female connectors 82 . The outside of the main body 81 of the upper adapter is a mechanical cylinder 83, and a sealed pressure-bearing connector 84 that is electrically represented as a double male head is integrated inside. A grooved contact surface is designed on the mechanical cylinder 83, and a suitable perfluoro rubber O-ring 85 is selected to complete the sealing between the upper conversion connector 80 and the upper interface end 50, and meet the sealing requirements of the upper end of the internal environment of the sound system. . Of the three female connectors 82, one is mounted on the right side of the sealed pressure-retaining connector 84 for the inward and downward electrical connections of the acoustic system. The other two are used in pairs and installed on the left side of the sealed pressure-bearing connector 84 to convert the electrical male head of the sealed pressure-bearing connector 84 into an electrical female head and serve as the external electrical interface of the sound system. The circular circlip 86 fixes the axial position of the female connector 82 in the upper conversion connector 80, and the positioning pin 87 ensures that the female connector 82 does not rotate in the circumferential direction after being installed.

The down conversion connector 90 uses one less pair of female connectors than the up conversion connector 80, which externally appears as an electrical male. In order to ensure the same circumferential orientation when the sound system is connected with the adjacent short joint, the structure of the upper adapter body 81 externally presents a positioning tongue 88 , and the structure of the lower adapter body 91 externally presents a positioning groove 92 .

The pressure-bearing design of the integrated receiving sound system 144 in this embodiment is based on its sealing structure, injecting electrically insulating silicone oil liquid into the above-mentioned internal sealing environment to keep the pressure inside and outside the capsule 30 balanced, so as to realize the oil-filled bearing pressure design. This sound system structure better couples the acoustic wave transducer and the wellbore fluid, and at the same time divides the working environment of the electronic circuit into two types: the internal environment and the external environment. The internal environment is the oil-filled sealed space in the capsule 30, and the external environment The well 15 is filled with fluid outside the capsule 30. Therefore, the cooling module 45 in the integrated receiving sound system 144 must be implemented in the internal environment in order to function better.

The cooling module 45 of the electronic circuit in the integrated receiving sound system 144 of this embodiment is implemented in the liquid-filled internal environment in which it operates. However, the internal environment space of the sound system is large, and the heat exchange with the external environment is easy. Therefore, the cooling amount and cooling power required to directly cool the entire internal environment are large, and the cooling of the electronic circuits in different receiving stations is very large. The effect is average, and it is difficult to achieve uniform cooling. In order to reduce the amount of cooling required and enhance the cooling effect of the electronic circuit, the present invention uses the cooling module 45 as a part of the receiving station 40, by constructing an adiabatic environment capable of placing the electronic circuit and transferring the heat generated inside it to the outside. Cool the electronic circuits in the receiving station.

The design of the cooling module 45 in the integrated receiving sound system 144 in this embodiment includes:

constructing an insulating chamber comprising an insulating chamber body 454 and an insulating chamber door 455;

Install the circuit board 442 on the electronic circuit frame 441, fix the insulating chamber 451 on the electronic circuit frame 441 through the limit nut 433, and position the electronic circuit frame 441 on the receiving station frame 41 through the limit block 431 and the limit bolt 432 within the range.

Through the limit bolts 432 and the wire holes on the electronic circuit frame 441 and the local wire channel, the inside and outside of the adiabatic chamber are communicated, so that the inside and outside of the adiabatic chamber 451 are in an oil-filled environment, and the heat generated by the electronic circuit can be quickly transferred to the The entire insulation chamber, thus avoiding the formation of local high temperature spots.

A plurality of independent coolers 456 and cascaded thermoelectric coolers 457 are installed on the insulating chamber body 454 , wherein the hot end 4521 is installed outside the insulating chamber 451 and the cold end 4522 is installed inside the insulating chamber 451 . During operation, the cold end 4522 of the cooler 452 absorbs the heat in the insulating chamber 451 and transfers it to the hot end 4521, and then discharges it into the inner environment.

The cooler control module is designed to determine which cooler 452 to use and the number of coolers 452 to work by monitoring the temperature in the adiabatic chamber 451 in real time and comparing it with the well ambient temperature, so as to consider both cooling power and extreme high temperature resistance. The cooling effect in both cases enhances the ability and reliability of the integrated sound system to work for long periods of time under ultra-high temperature wireline logging conditions.

The wireline acoustic logging construction in this embodiment specifically includes:

Referring to FIG. 1 , the cable 12 on the surface 10 logging vehicle 11 crosses the pulley 131 on the derrick 13 and is connected with the acoustic logging tool string 14 . During well logging, the logging truck 11 controls the position of the tool in the wellbore 15 by performing lifting and lowering operations of the cable 12 to operate at different depths. The wellbore 15 can have a depth of several kilometers and includes an upper casing section 151 and a lower open hole section 152 . Wireline sonic logging may enable evaluation of formation 16 when operating in open hole section 152 .

The acoustic logging tool string 14 includes, from top to bottom, an anti-rotation sub-section 141, a telemetry sub-section 142, a main control sub-section 143, an integrated receiving sound system 144, a sound insulator 145, and an integrated transmitting sound system 146, wherein the integrated receiving sound system 144 and the integrated launch sound system 146 are oil-filled pressure sound systems.

The anti-rotation sub 141 interacts with the well wall 153 to prevent the instrument and the cable from performing violent reciprocating torsional motion, thereby ensuring the reliability of azimuth measurement. The telemetry sub section 142 acts as a control and communication medium between the ground system and the main control sub section 143 on the one hand, and realizes the measurement function of the instrument attitude and natural gamma on the other hand. The main control sub section 143 receives the ground command transmitted by the telemetry sub section 142 , controls the transmitting sound system 146 and the receiving sound system 144 to work in an orderly manner, and uploads data to the telemetry sub section 142 . The emission sound system 146 integrates sound sources such as monopoles and dipoles, capable of generating different types of sound waves and radiating into the formation. The receiving acoustic system 144 integrates a plurality of receiving transducers and corresponding processing circuits to realize the array azimuth receiving function, and can collect the full-wave train signals of acoustic waves from different paths and different formations. For example, the gliding wave 181 in the full wave train can reflect the formation information near the wellbore wall, and the propagation path, propagation time and amplitude attenuation of the reflected wave 182 can reflect the characteristics of the geological body 17 beside the well, such as the size of the geological body, the distance from the wellbore The distance and orientation of the holes, etc. The sound insulator 145 ensures that the sliding longitudinal wave becomes the first wave of the full wave train by means of grooves, etc., and at the same time reduces the amplitude of the received direct wave from the instrument shell, and improves the signal-to-noise ratio of the logging signal.

During sonic logging, the tool is first quickly lowered to the bottom of the target well section (close to the bottom of the well), then lifted up to the top of the target well section, followed by re-testing and data quality inspection, and finally raised to the surface quickly. The whole process generally takes several hours. In the early stage of well logging, the fluid in the formation 16 and the wellbore 15 heats the integrated receiving acoustic system 144, resulting in a continuous increase in the internal temperature of the electronic circuit in the acoustic system. In the middle and later stages of logging, the temperature of the internal environment (especially around the heat-generating components) in which the electronic circuit works will be significantly higher than the temperature of the external environment (wellbore fluid) due to the constant generation of heat by the heat-generating components in the acoustic system. The internal environment of the existing integrated sound system can only dissipate heat to the well hole 15 under the action of the temperature difference, and the effect is limited. In this case, the internal ambient temperature in which the electronic circuit works will greatly exceed the rated operating temperature of the components, and the failure rate of the instrument is very high.

Therefore, in this embodiment, by constructing a partial thermal insulation chamber 451 in the receiving station of the integrated receiving sound system 144 and installing the electronic circuit in it, the heat generated by the electronic circuit is quickly transferred to the outside of the thermal insulation chamber through the silicone oil liquid and two kinds of thermoelectric coolers, Thereby cooling the working environment of the electronic circuit. The invention solves the cooling problem of the distributed electronic circuit modules in the liquid-filled pressure-bearing integrated receiving sound system without increasing the length of the sound system and without destroying the modular structure of the sound system, and can ensure the long-term electronic circuit in the sound system. Working in an environment below a specific temperature (lower than the borehole fluid temperature), thereby significantly enhancing the ability and reliability of the integrated acoustic system to work for a long time under ultra-high temperature wireline logging conditions, and improving sonic logging operations in ultra-deep and high temperature wells success rate.

Although the specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, they should not be construed as limiting the protection scope of this patent. Within the scope described in the claims, various modifications and deformations that can be made by those skilled in the art without creative work still belong to the protection scope of this patent.

Claims (6)

1. A sound logging integrated receiving sound system structure containing a cooling module, is characterized in that: comprising an integrated receiving sound system arranged in the sound logging instrument string; The integrated receiving sound system includes a mechanical housing, a capsule, at least one receiving station, an upper interface end, a lower interface end, a mechanical coupling block, an up-conversion connector and a down-conversion connector; The capsule is arranged in the mechanical shell; the receiving station is arranged in the capsule, and is respectively connected with the upper interface end and the lower interface end through the mechanical coupling block; the upper interface end is connected with the upper conversion connection The interface end is connected with the down conversion connector; The mechanical coupling block realizes the connection between the upper interface end and the receiving station and between the lower interface end and the receiving station through the clamping slot, and is fixed by an open spring coil; The receiving station includes a receiving station frame, two sets of receiving transducers, a positioning module, an electronic circuit module and a cooling module; the two sets of receiving transducers are installed on the outer surface of the receiving station frame, the electronic circuit module and the cooling module. Installed in the frame of the receiving station skeleton through the positioning module; Each group of receiving transducers includes 8 receiving transducers, and the 8 receiving transducers are arranged at an interval of 45° in the circumferential direction of the integrated receiving acoustic system, and the receiving transducers and the sound-transmitting window on the mechanical casing are in the circumferential direction. one-to-one correspondence; The signal line of the receiving transducer is connected to the circuit board through the first wire hole on the receiving station frame, the second wire hole on the limit bolt and the third wire hole on the electronic circuit frame; the circuit The board is mounted on the electronic circuit skeleton through the second screw; The positioning module includes two limit blocks, limit bolts and limit nuts; the two limit blocks are installed on the inner side of the receiving station frame; one side of the limit bolt is connected with the limit block, and the other side is connected with the electronic circuit frame , to fine-tune the position of the cooling module and the electronic circuit module in the axial direction of the receiving station; the cooling module includes an insulating chamber and a cooler; The adiabatic chamber is fixed on the electronic circuit skeleton through the limit nuts on both sides, and the cooler is installed on the adiabatic chamber through the third screw; the electronic circuit skeleton is positioned in the receiving station skeleton through the limit block and the limit bolt, Both ends of the electronic circuit skeleton are provided with wire and liquid passages that communicate with the outside of the adiabatic chamber; The adiabatic chamber includes an adiabatic chamber main body and two adiabatic chamber doors; the adiabatic chamber doors are in close contact with the adiabatic chamber main body through a limit nut. 2. The acoustic logging integrated receiving sound system structure with cooling module according to claim 1, characterized in that: the cross-section of the partial section of the electronic circuit frame inside the adiabatic chamber is square, so as to install 4 analog channel plates ; The control board in the adiabatic chamber is fixed in the middle of the electronic circuit frame to control 8 analog channel boards. 3 . The acoustic logging integrated receiving acoustic structure with cooling module according to claim 1 , wherein the cooler is installed on two installation planes in the axial middle of the adiabatic chamber and at a circumferential interval of 180°. 4 . The hot end of the cooler is installed on the outside of the adiabatic room, and the cold end of the cooler is installed on the inside of the adiabatic room; the cooler is an independent cooler; a plurality of independent coolers are cascaded and packaged to form a cascade cooling The cooling module includes at least one freestanding cooler and at least one cascaded cooler; the freestanding cooler and the cascaded cooler are controlled by a cooler control module in the receiving station. 4 . The acoustic logging integrated receiving acoustic structure with cooling module according to claim 1 , wherein the upper interface end and the lower interface end are fixed on the mechanical casing by first screws, and the upper interface end Both the head and the lower interface end are provided with circulating oil holes; the two ends of the capsule are fixedly connected with the upper interface end and the lower interface end through a tie. 5 . The acoustic logging integrated receiving acoustic structure with cooling module according to claim 1 , wherein the upper conversion connector comprises an upper adapter body and three female connectors; the upper adapter The outside of the main body is a mechanical cylinder, which is integrated with a sealed pressure-bearing connector; the mechanical cylinder is provided with a groove-type contact surface, and the groove-type contact surface is matched with a perfluororubber O-ring to realize the upper conversion connector and The seal between the ends of the upper interface; The female connector is fixed at the axial position of the conversion connector through a circular circlip and a positioning pin; one of the female connectors is installed on the right side of the sealed pressure-bearing connector, and the other two female connectors are installed On the left side of the sealed pressure-bearing connector, the electrical male head of the sealed pressure-bearing connector is converted into an electrical female head and used as the external electrical interface of the integrated receiving sound system. 6 . The acoustic logging integrated receiving acoustic structure with cooling module according to claim 1 , wherein the acoustic logging instrument string comprises an anti-rotation sub-section, a telemetry sub-section, a The main control sub-section, the integrated receiving sound system, the sound insulator and the integrated emission sound system; the anti-rotation sub-section is in contact with the well wall; the telemetry sub-section is respectively connected with the ground system and the main control sub-section for communication; the The main control sub section receives the ground commands transmitted by the telemetry sub section to control the work of the transmitting sound system and the receiving sound system; the transmitting sound system integrates monopole and dipole sound sources; The acoustic logging instrument string is connected with one end of the cable, and the other end of the cable is connected with the logging vehicle on the ground across the pulley on the derrick.

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