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

Sound wave logging integrated receiving acoustic system structure with cooling module

Technical Field

The invention belongs to the technical field of acoustic logging, and particularly relates to an acoustic logging integrated receiving acoustic system structure with a cooling module.

Background

Acoustic logging is an important logging method, which determines the geological properties of the formation and the borehole engineering conditions by measuring the acoustic properties of the borehole wall or the medium beside the borehole. The technology has important application and wide prospect in the aspects of reservoir fine description and reconstruction, well engineering condition evaluation, while-drilling geological guiding and the like.

The acoustic logging instrument is a tool for acquiring acoustic logging data and is a bridge for connecting a geophysical logging method and interpretation application. Acoustic logging instruments are becoming more complex and more functionally integrated. The acoustic logging receiving acoustic system is gradually upgraded to a multi-pole, arrayed and azimuth receiving acoustic system from a monopole receiving mode, acoustic signal receiving under the conditions of different azimuths, different source distances and different distances can be realized, and comparison verification and arrayed imaging are carried out, so that the resolution and reliability of instrument imaging are increased, and the three-dimensional detection characteristic of the instrument is improved.

The novel cable type acoustic logging integrated receiving acoustic system is based on a capsule liquid filling pressure-bearing type structure, adopts a modularization and integration design idea, and comprises a plurality of relatively independent modularization receiving stations. In the acoustic system, the positions of an electronic circuit and a heating source are obviously distributed, and components (such as MOS (metal oxide semiconductor) tubes, power chips, FPGAs (field programmable gate arrays), DSPs (digital signal processors) and the like) with high integration, high working frequency and high power consumption generate large heat. In the middle and later periods of high-temperature well logging, the temperature of silicone oil inside the capsule (particularly at the position of a heating electronic component) is higher than the temperature of well hole fluid outside the capsule due to the heat generated by the electronic component, and the heat can be dissipated outside the capsule only in a mode of liquid coupling temperature difference gradient, so that the cooling effect is limited. At this time, the ambient temperature of the electronic component may be much greater than the rated operating temperature of the component. This can greatly affect the performance of the device or even cause complete damage, which can lead to instrument failure. The condition occurs more frequently when logging in a deep well, an ultra-deep well or a geothermal well (the temperature can reach more than 300 ℃) with high ground temperature gradient, and the success rate and the efficiency of logging operation are seriously influenced.

Aiming at the current situation and trend that the temperature of the internal environment (inside a capsule) and the temperature of the external environment (outside the capsule) of the electronic circuit in the integrated sound system are constantly increased, the high-temperature resistant problem of the electronic circuit is difficult to solve only by means of the conventional high-temperature aging screening method. It is needed to design an integrated receiving acoustic system for acoustic logging with a cooling module to reduce the temperature of the working environment 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 a well for a long time to perform better logging service.

Disclosure of Invention

The invention aims to provide a sound wave logging integrated receiving sound system structure comprising a cooling module aiming at the defects in the prior art, so as to solve the problems that the working environment temperature of an electronic circuit in the integrated receiving sound system is high and the cooling effect of a liquid coupling temperature difference heat dissipation mode is limited.

In order to achieve the purpose, the invention adopts the technical scheme that:

an integrated receiving acoustic system structure for acoustic logging with a cooling module comprises an integrated receiving acoustic system arranged in an acoustic logging instrument string;

the integrated receiving acoustic system comprises a mechanical shell, a capsule, at least one receiving station, an upper interface end, a lower interface end, a mechanical coupling block, an upper conversion connecting joint and a lower conversion connecting joint;

the capsule 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 station comprises a receiving station framework, two groups of receiving transducers, a positioning module, an electronic circuit module and a cooling module; and the two groups of receiving transducers are arranged on the outer surface of the receiving station framework, and the electronic circuit module and the cooling module are arranged in the framework of the receiving station framework through the positioning module.

Furthermore, 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 clamping groove clamping, and is fixed through a circlip.

Furthermore, each group of receiving transducers comprises 8 receiving transducers, the 8 receiving transducers are arranged on the circumference of the integrated receiving sound system at intervals of 45 degrees, and the receiving transducers are in one-to-one correspondence with the positions of the sound transmission windows on the mechanical shell on the circumference;

a signal wire of the receiving transducer is connected with the circuit board through a first wire passing hole in the receiving station framework, a second wire passing hole in the limiting bolt and a third wire passing hole in the electronic circuit framework; the circuit board is mounted on the electronic circuit framework through a second screw.

Furthermore, the positioning module comprises two limiting blocks, a limiting bolt and a limiting nut;

the two limiting blocks are arranged on the inner side of the receiving station framework; one side of the limiting bolt is connected with the limiting block, and the other side of the limiting bolt is connected with the electronic circuit framework so as to finely adjust the positions of the cooling module and the electronic circuit module in the axial direction of the receiving station.

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

the heat insulation chamber is fixed on the electronic circuit framework through limiting nuts on two sides, and the cooler is installed on the heat insulation chamber through a third screw; the electronic circuit framework is positioned in the receiving station framework through a limiting block and a limiting bolt, and both ends of the electronic circuit framework are provided with a threading channel and a liquid passing channel which are communicated with the outside of the heat insulation chamber;

the heat-insulating chamber comprises a heat-insulating chamber main body and two heat-insulating chamber doors; the heat insulation chamber door is closely contacted with the heat insulation chamber body through a limit nut.

Further, the cross section of a partial section of the electronic circuit framework in the heat insulation chamber is square, so that 4 simulation channel plates are installed; and a control board in the heat insulation chamber is fixed in the middle of the electronic circuit framework so as to control the 8 analog channel boards.

Further, the cooler is arranged on two installation planes which are arranged in the axial middle part of the heat insulation chamber and are circumferentially spaced by 180 degrees; the hot end of the cooler is arranged at the outer side of the heat insulation chamber, and the cold end of the cooler is arranged at the inner side of the heat insulation chamber; the cooler is an independent cooler; a plurality of individual coolers are cascaded and packaged to form a cascaded cooler; the cooling module comprises at least one independent cooler and at least one cascade cooler; the individual coolers and the cascade coolers are controlled by a cooler control module in the receiving station.

Furthermore, the upper interface end and the lower interface end are fixed on the mechanical shell through first screws, and the upper interface end and the lower interface end are both provided with circulating oil holes; the two ends of the capsule are fixedly connected with the upper connector end and the lower connector end through the binding belts.

Further, the upper conversion connecting joint comprises an upper conversion connecting joint main body and 3 female connector; the outer part of the upper rotary joint main body is a mechanical cylinder, and a sealing pressure-bearing connector is integrated in the upper rotary joint main body; a groove type contact surface is arranged on the mechanical cylinder and matched with the perfluororubber O-shaped ring so as to realize the sealing between the upper conversion connecting joint and the upper interface end;

the female head connector is fixed at the axial position of the conversion connector through a circular clamp spring and a positioning pin; among the upper conversion connector, a female connector 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, so that an electric male head of the sealed pressure-bearing connector is converted into an electric female head which serves as an external electric interface of an integrated receiving sound system.

Furthermore, the acoustic logging instrument string comprises an anti-rotation short section, a remote measuring short section, a master control short section, an integrated receiving sound system, a sound insulator and an integrated transmitting sound system which are sequentially arranged from top to bottom; the anti-rotation short section is in contact connection with the well wall; the remote measuring short joint is respectively in communication connection with the ground system and the master control short joint; the master control short section receives a ground command transmitted by the remote measuring short section so as to control the operation of a transmitting sound system and a receiving sound system; the transmitting acoustic system is integrated with a monopole sound source and a dipole sound source;

the acoustic logging instrument string is connected with one end of a cable, and the other end of the cable is connected with a logging truck on the ground through a pulley on the derrick.

The sound wave logging integrated receiving sound system structure containing the cooling module provided by the invention has the following beneficial effects:

according to the invention, a local heat insulation chamber is constructed in a receiving station of the integrated receiving acoustic system, the electronic circuit is installed in the receiving station, heat generated by the electronic circuit is quickly transferred to the outside of the heat insulation chamber through silicon oil liquid and two coolers, the cooling problem of the working environment of the distributed electronic circuit module in the direct pressure-bearing integrated receiving acoustic system is solved under the conditions of not increasing the length of a pup joint and not damaging the modular structure of the acoustic system, and the electronic circuit in the acoustic system can be ensured to work in the environment below a specific temperature (lower than the temperature of well bore fluid) for a long time, so that the long-time working capacity and reliability of the integrated acoustic system under the ultra-high temperature cable logging condition are obviously enhanced, and the success rate and efficiency of acoustic logging operation in the ultra-deep high temperature well are improved.

Drawings

FIG. 1 is a schematic diagram of a construction site for wireline acoustic logging.

Fig. 2 is a front view of an integrated receiving acoustic system.

Fig. 3 is a cross-sectional view at a-a in fig. 2.

Fig. 4 is a sectional view at B-B in fig. 2.

Fig. 5 is a sectional view at C-C in fig. 2.

Wherein, 10, the ground; 11. logging a well truck; 12. a cable; 13. a derrick; 14. a sonic logging instrument string; 15. a wellbore; 16. a subterranean formation; 17. a well-side geologic body;

131. a pulley; 141. an anti-rotation short section; 142. a telemetry sub; 143. a master control short section; 144. an integrated receiving acoustic system; 145. a sound insulator; 146. integrating the transmitting sound system; 151. a cased well section; 152. an open hole section; 153. a well wall; 181. a gliding wave; 182. reflecting the wave;

20. a machine housing; 21. a strip acoustic window; 22. sound insulation grooving; 23. a first screw;

30. a capsule; 31. binding a belt;

40. a receiving station; 41. a receiving station framework; 42. a receiving transducer; 43. a positioning module; 44. an electronic circuit module; 45. a cooling module;

411. a first wire passing hole; 431. a limiting block; 432. a limit bolt; 433. a limit nut; 434. a second wire passing hole; 435. a local line channel; 436. a through wire channel; 441. an electronic circuit framework; 442. a circuit board; 443. a second screw; 444. a third wire passing hole; 445. simulating a channel plate; 446. a control panel; 451. a thermally insulated chamber; 452. a cooler; 4521. a hot end; 4522. a cold end; 453. A third screw; 454. a thermally insulated chamber body; 455. an insulated chamber door; 456. a free-standing cooler; 457. a cascade cooler;

50. an upper interface end; 51. a first protective cap; 52. a circulating oil hole;

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

70. a mechanical coupling block; 71. a circlip;

80. an upper conversion adapter; 81. an upper adapter body; 82. a female connector; 83. a mechanical cylinder; 84. a sealed pressure-bearing connector; 85. a perfluororubber O-ring; 86. a circular clamp spring; 87. positioning pins; 88. positioning the tongue;

90. a lower conversion connection joint; 91. a lower sub body; 92. and (6) positioning a groove.

Detailed Description

The following description of the present invention is provided to facilitate understanding of the present invention by those skilled in the art. It is to be understood that the invention is not to be limited in scope by the specific embodiments disclosed, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. It will be apparent to those skilled in the art that various modifications (which are obvious) are within the spirit and scope of the invention as defined and defined in the appended claims.

Referring to fig. 1, the sonic logging integrated receiving acoustic structure with cooling module of the present disclosure, according to one embodiment of the present disclosure, includes an integrated receiving acoustic 144 disposed in a sonic logging instrument string.

Referring to fig. 2, the integrated receiving acoustic system 144 includes a machine housing 20, a capsule 30, at least one receiving station 40, an upper interface head 50, a lower interface head 60, a mechanical coupling block 70, an upper transition joint 80, and a lower transition joint 90.

The capsule 30 is arranged in the machine housing 20; the receiving station 40 is arranged inside the capsule 30 and is connected to the upper interface head 50 and the lower interface head 60, respectively, by means of a mechanical coupling block 70; the upper interface end 50 is connected to the upper transition joint 80 and the lower interface end 60 is connected to the lower transition joint 90.

The integrated receiving acoustic system 144 of the embodiment solves the problem of cooling the working environment of the distributed electronic circuit module in the acoustic system, and can ensure that the electronic circuit in the acoustic system works in the environment below a specific temperature (lower than the temperature of well fluid) for a long time, so that the capability and reliability of the integrated acoustic system working for a long time under the condition of ultra-high temperature cable logging are remarkably enhanced, and the acoustic system is better applied to the three-dimensional acoustic logging of the ultra-high temperature ultra-deep well. In addition, the integrated acoustic system can reduce the length of an instrument, realize local acquisition of signals and be beneficial to improving the signal-to-noise ratio of weak signal acquisition in remote detection logging.

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

in the embodiment, the mechanical shell 20 is made of stainless steel or titanium alloy material, and the mechanical shell 20 is provided with a band-shaped sound transmission window 21 along the axial direction of the acoustic system to ensure the sound transmission effect between the acoustic transducer and the borehole fluid; the mechanical shell 20 is further provided with a circular arc sound insulation notch 22 along the circumferential direction of the sound system, and the circular arc sound insulation notch 22 is used for reducing the interference of the direct wave of the instrument shell on a useful signal. The use of the acoustic window 21 and acoustic notch 22 prevents the machine housing 20 from acting as a pressure-bearing seal to isolate the wellbore fluid pressure and protect the internal electronics.

The capsule 30 of the present embodiment is made of a material that is resistant to gases such as hydrogen sulfide to protect the internal electronics from corrosion by downhole gases.

The receiving station 40 of the present embodiment includes a receiving station skeleton 41, a receiving transducer 42, a positioning module 43, an electronics module 44, and a cooling module 45.

Referring to fig. 3, each receiving station 40 includes two sets of receiving transducers 42, each set including 8 receiving transducers 42, each mounted on the outer surface of the receiving station frame 41. The 8 receiving transducers 42 in each group are arranged at 45 ° intervals in the circumferential direction of the acoustic system for receiving acoustic signals from different directions of the earth formation and converting the acoustic signals into electrical signals. The sound-transmitting windows 21 on the machine housing correspond one-to-one to the positions of the receiving transducers 42 in the circumferential direction. Referring to fig. 2, the electronics module 44 and the cooling module 45 are mounted within the frame of the docking station chassis 41 by the positioning module 43, the cooling module 45 being a spatially and mechanically inseparable integral part of the electronics module 44; but the relative position of the two 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 and improves the signal-to-noise ratio of weak signal acquisition, but also has a cooling function, so that the receiving station can be better applied to the remote detection acoustic logging of a high-temperature well.

The signal line of the receiving transducer 42 is connected to the circuit board 442 through the first line through hole 411 on the receiving station skeleton 41, the second line through hole 434 on the limiting bolt 432 and the third line through hole 444 on the electronic circuit skeleton 441. The spacer bolt 432 has a local wire path 435 in the center for passing electrical connection wires between the receiving station 40 and the upper interface end 50, the lower interface end 60, and the adjacent receiving station 40. In addition, 2 stoppers 431 are provided with circular through-wire channels 436 for connecting wires, such as 220V ac lines and CAN buses, etc., which are used outside the thermal insulation chamber 451 by lower modules, nipples or instruments but not used by the receiving station 40.

The positioning module 43 includes a stopper 431, a stopper bolt 432, and a stopper nut 433. The electronics module 44 includes an electronics backbone 441 and a circuit board 442, and the cooling module 45 includes two parts, an insulating chamber 451 and a cooler 452.

The 2 stoppers 431 of the positioning module 43 are mounted inside the docking station frame 41 in the form of baffles, which define the extent of the cooling module 45 and its internal electronics module 44 in the axial direction of the docking station 40. The limiting bolt 432 is connected to the limiting block 431 on one side and the electronic circuit framework 441 on the other side for fine adjustment of the positions of the cooling module 45 and the electronic circuit module 44 in the axial direction of the receiving station 40. The heat insulating chamber 451 is fixed to the electronic circuit frame 441 by the stopper nuts 433 on both sides, and the cooler 452 is attached to the heat insulating chamber 451 by the third screws 453. The two ends of the electronic circuit framework 441 are provided with a wire passing channel and a liquid passing channel which are communicated with the outside of the heat insulation chamber 451, and the middle of the electronic circuit framework is a solid body. The circuit board 442 is mounted on the electronic circuit skeleton 441 by a second screw 443.

The electronic circuit of the present embodiment implements the functions of sampling, amplifying, filtering, AD converting, and bus communication of the signals of the multiple receiving transducers 42. The electronics module 44 cooperates with the receiving transducer 42 to perform the acquisition of acoustic logging signals. The electronic circuit also includes a cooler control module to control operation of the cooler to create a localized low temperature environment for the electronic circuit to operate.

The cooling module 45 is used to reduce the ambient temperature near the electronic circuit, so that the electronic circuit can work at a lower temperature, thereby improving the high temperature resistance of the acoustic system.

Specifically, referring to fig. 2, the cooling module 45 is installed within the frame of the receiving station framework 41, and includes an adiabatic chamber 451 and a cooler 452.

The heat-insulating chamber 451 is fixed to the electronic circuit skeleton 441 by the stopper nuts 433 on both sides thereof, and the cooler 452 is attached to the heat-insulating chamber 451 by the third screw 453. The electronics bobbin 441, which may be aluminum to reduce weight, is positioned within the receiving station bobbin 41 by a stop 431 and a stop bolt 432. The circuit board 442 is placed in the heat insulating chamber 451 and fixed to the electronic circuit skeleton 441 by a second screw 443. It can be seen that the cooling module 45 and the electronics module 44 are already integrated into a single, spatially and mechanically inseparable unit. It should be noted that the relative positions of the cooling module 45 and the electronics module 44 in the circumferential direction may be adjustable.

The insulating chamber 451 is used to create a local insulating space in the internal environment in which the electronic circuitry is placed. It reduces the range of action of the cooling module 45 on the one hand and prevents heat exchange between the inside and outside of the thermally insulated chamber 451 on the other hand, so that the cooling module 45 acts mainly on the heat generated by the electronic circuit, reducing the required cooling power.

The heat insulation chamber 451 is made of low heat conductivity materials such as 1Cr18Ni9Ti and is made of a vacuum structure, and the inner surface and the outer surface of the heat insulation chamber are plated with insulating paint.

The insulated chamber 451 is composed of an insulated chamber body 454 and two insulated chamber doors 455, wherein the insulated chamber doors 455 are in close contact with the insulated chamber body 454 by the stopper nuts 433, thereby constituting a relatively sealed insulated environment. Both insulated compartment doors 455 are removable to facilitate easy access to and removal of the electronics module 44. The first wire through hole 411, the second wire through hole 434, the third wire through hole 444 and the local wire channel 435 can be used for receiving signal wires between the transducer 42 and the receiving station 40 and between adjacent receiving stations 40 on one hand, and on the other hand, the communication between the inside and the outside of the heat insulation chamber 451 is realized, so that the heat insulation chamber is also ensured to be in an oil-filled direct pressure-bearing environment, and the mechanical strength requirement and the engineering difficulty of the heat insulation chamber are greatly reduced. However, the presence of the first, second, third and local wire holes 411, 434, 444 and 435 may accelerate heat exchange between the inside and outside of the heat-insulating chamber 451, which is disadvantageous for cooling the heat-insulating indoor space. Therefore, the size of these ducts should be minimized to satisfy the signal line connection and the communication between the inside and outside of the heat insulating chamber 451. In addition, in order to further reduce the amount of heat exchange between the inside and outside of the insulated compartment 451, the global connections not used by the receiving station 40, but used by the acoustic system or elsewhere in the entire train of instruments, are disposed within the through-wire channel 436 outside of the insulated compartment 451 to facilitate the removal and installation of the electronics module 44 and the cooling module 45 in the receiving station 40.

Reference is made to fig. 4, which is a B-B sectional view at the analog channel plate 445 within the insulated chamber 451. The receiving station framework 41 is discontinuous in the circumferential direction, only two positions at 180-degree intervals are mechanical connection entities, and the rest positions are blank. This not only reduces the weight of the docking station backbone 41, but also facilitates the installation and commissioning of the electronics module 44 and cooling module 45. Inside the thermally insulated chamber 451, the cross-section of the electronics backbone 441 may be shaped differently to facilitate the mounting of the circuit board 442. In this example, a square, 4 analog channel boards 445 may be installed to process the signals of 8 transducers. It should be noted that there are also 4 analog channel boards 445 on the right side inside the insulated chamber 451 to process another set of 8 transducer signals.

Reference is made to fig. 5, which is a C-C sectional view at the control panel 446 within the acoustic insulation chamber 451. To better install cooler 452, insulated chamber 451 includes 2 installation planes (shown in FIG. 2) spaced 180 apart there. The control board 446 is fixed on the electronic circuit framework 441 and comprises two functions of acquisition control and cooler control. On one hand, the control board controls the work of the 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 of cooler 452 and the number of operations based on the temperature difference between the inside of the insulated chamber 451 and the environment of the wellbore 15, thereby adapting the acoustic system to wellbore 15 environments of different temperatures, especially for extremely high temperature wells. It should be noted that the relative circumferential orientation of the cooler 452 and the control plate 446 may be adjustable.

Referring to fig. 2, the cooler 452 is installed on two installation planes spaced 180 ° apart circumferentially at an axially intermediate portion of the heat insulating chamber 451. The cooler 452 is selected to be a thermoelectric cooler based on the peltier effect. When installed, the hot end 4521 (heat-releasing side) of the cooler 452 is installed outside the insulated compartment 451, and the cold end 4522 (heat-absorbing side) is installed inside the insulated compartment. Upon energization, the cold end 4522 of the thermoelectric cooler absorbs heat from the insulated chamber 451 and transfers it to the hot end 4521 and then discharges it into the acoustic environment.

Cooler 452 comprises a plurality of individual coolers 456, and a plurality of individual coolers 456 are cascaded and packaged to form a cascaded cooler 457 enabling a greater temperature differential between the hot and cold sides.

The cooling module 45 of this embodiment preferably includes both a standalone cooler 456 and a cascaded cooler 457, the latter of which provides a lower temperature operating environment for the electronic circuitry. In addition, the cooling module 45 may use a plurality of coolers 452, on one hand, to increase the cooling power, and on the other hand, to increase the reliability of the cooling module 45 by using a part of the coolers 452 as a backup, in a manner of hardware redundancy. In the particular integrated receive acoustic train 144, the manner in which the coolers 452 operate and the number of coolers are determined by the cooler control module. In this way, the cooling module 45 can take into account both the cooling power and the extreme high temperature resistance.

The chiller control module has both temperature measurement and chiller 452 operation control functions. It controls which kind of cooler 452 works and the number of works in the cooling module 45 by monitoring the temperature in the heat-insulating chamber 451 in real time and comparing with the well environment temperature, thereby ensuring the cooling effect. For example, when the well ambient temperature is not much higher than the rated operating temperature of the circuit board 442 (e.g., 150 ℃), the cooling module 45 may operate using one or more of the individual coolers 456, providing greater cooling power; and when the well ambient temperature is not less than the nominal operating temperature of circuit board 442 (exceeding the nominal temperature difference between hot and cold ends 4521 and 4522 of free-standing cooler 456), free-standing cooler 456 cannot stabilize the temperature in insulated compartment 451 below the nominal operating temperature of circuit board 442. The use of the cascade cooler 457 allows for a higher temperature differential between the inside and outside of the insulated enclosure, thereby allowing the acoustic system to operate at extremely high temperatures, such as above 230 c. The high temperature resistance of the integrated acoustic system is greatly improved, and the operation capability of the acoustic logging instrument is improved.

The upper interface head 50 and the lower interface head 60 are structurally and functionally similar and are used in pairs to provide a mechanical, internal coupling fluid and internal environmental seal interface to the outside. The upper interface connector 50 is a mechanical male connector, the lower interface connector 60 is a mechanical female connector, and when the acoustic system is stored separately, the corresponding first protective cap 51 and second protective cap 61 need to be installed on the interface connectors. The upper interface end 50 and the lower interface end 60 are fixed on the machine housing 20 by the first screw 23 to improve the mechanical strength of the acoustic system, the circulation oil holes 52 on 2 interface ends provide the inlet and outlet of the internal coupling liquid (silicon oil, etc.), and the two ends of the capsule 30 are fixed on the two interface ends by the binding bands 31 to realize the sealing function. Additionally, the upper and lower interface heads 50, 60 provide a mechanical transition for the communication between the receiving station 40 and the upper and lower transfer joints 80, 90.

The mechanical coupling block 70 may be formed by two glass fiber reinforced plastic blocks, which connect the receiving station 40 with the upper interface connector 50 and the lower interface connector 60 in a clamping groove clamping manner, and are reinforced by a circlip 71, so as to ensure reliable connection and consistent reference orientation between the two. In addition, the mechanical coupling block 70 may also connect adjacent receiving stations 40 to form an array azimuth receiving acoustic system including a plurality of receiving stations 40.

The upper conversion connecting joint 80 and the lower conversion connecting joint 90 are used in pairs, so that on one hand, the standardization of the connecting interfaces between the sound system short joint and other short joints (the main control short joint 143, the sound insulator 145 and the like) is realized, and on the other hand, the sound system short joint plays an important role in constructing the sealed internal environment of the sound system. Upper transfer connector 80 appears externally as an electrical female, while lower transfer connector 90 appears externally as an electrical male.

The upper conversion coupling 80 is composed of an upper coupling main body 81 and 3 female connectors 82. The upper adapter body 81 has a mechanical cylinder 83 on the outside and a sealed pressure-bearing connector 84 electrically embodied as a double male connector integrated therein. The groove type contact surface is designed on the mechanical cylinder 83, and the appropriate perfluororubber O-shaped ring 85 is selected, so that the sealing between the upper conversion connecting joint 80 and the upper interface end 50 can be completed, and the sealing requirement of the upper end of the internal environment of the acoustic system is met. Of the 3 female connectors 82, 1 is mounted on the right side of the hermetic pressure-bearing connector 84 for acoustic inward and downward electrical connection. The other two connectors are used in pairs and are installed on the left side of the sealed pressure-bearing connector 84, and an electric male connector of the sealed pressure-bearing connector 84 is converted into an electric female connector and serves as an external electric interface of a sound system. The circular snap spring 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 circumferentially after being installed.

Lower transfer connector 90 uses less of a pair of female connectors than upper transfer connector 80 and represents an electrical male connector to the outside. To ensure that the acoustic system is circumferentially oriented when connected to an adjacent sub, the structure of the upper adapter body 81 appears externally as a positioning tongue 88, while the structure of the lower adapter body 91 appears externally as a positioning groove 92.

The pressure-bearing design of the integrated receiving acoustic system 144 of the present embodiment is to inject electrically insulating silicone oil liquid into the internal sealed environment on the basis of the sealing structure thereof, so as to keep the pressures inside and outside the capsule 30 balanced, thereby realizing the oil-filled pressure-bearing design. This acoustic architecture better couples the acoustic transducer to the borehole fluid while separating the environment in which the electronics operate into an internal environment, which is an oil-filled sealed space within the capsule 30, and an external environment, which is the borehole 15 outside the capsule 30 filled with fluid. Thus, the cooling module 45 in the integrated receiving acoustic system 144 must be implemented in the internal environment to function better.

The cooling module 45 of the electronics in the integrated receive acoustic train 144 of the present embodiment is implemented in the liquid-filled internal environment in which it operates. However, the acoustic system has a large internal environment space and is easy to exchange heat with the external environment, so that the cooling amount and cooling power required for directly cooling the whole internal environment are large, the cooling effect on electronic circuits in different receiving stations is general, and uniform cooling is difficult to achieve. To reduce the amount of cooling required and to enhance the cooling of the electronic circuitry, the present invention uses a cooling module 45 as part of the receiving station 40 to cool the electronic circuitry in the receiving station by creating a thermally insulating environment in which the electronic circuitry can be placed and transferring the heat generated within to the outside.

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

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

the circuit board 442 is mounted on an electronic circuit framework 441, the heat-insulating chamber 451 is fixed to the electronic circuit framework 441 by a stopper nut 433, and the electronic circuit framework 441 is positioned within the receiving station framework 41 by a stopper 431 and a stopper bolt 432.

The inside and the outside of the heat insulation chamber are communicated through the limiting bolt 432, the wire passing holes in the electronic circuit framework 441 and the local wire channel, so that the inside and the outside of the heat insulation chamber 451 are both in an oil filling environment, heat generated by an electronic circuit can be quickly transferred into the whole heat insulation chamber, and a local high-temperature point is prevented from being formed.

A plurality of free-standing coolers 456 and cascaded thermoelectric coolers 457 are mounted on an insulated chamber body 454 with hot end 4521 mounted outside of insulated chamber 451 and cold end 4522 mounted inside of insulated chamber 451. In operation, cold end 4522 of cooler 452 absorbs heat from insulated chamber 451 and transfers it to hot end 4521 and discharges it to the ambient environment.

The cooler control module is designed to determine which cooler 452 is selected to work and the number of the coolers 452 in work by monitoring the temperature in the heat insulation chamber 451 in real time and comparing the temperature with the well environment temperature, so that the cooling effect under the conditions of cooling power and extreme high temperature resistance is considered at the same time, and the capability and reliability of the integrated acoustic system working for a long time under the condition of ultra-high temperature cable logging are enhanced.

This embodiment cable type acoustic logging construction specifically includes:

referring to FIG. 1, a cable 12 on a surface 10 logging truck 11 is connected to a sonic logging instrument string 14 over a pulley 131 on a derrick 13. During logging, the logging truck 11 controls the position of the tool in the borehole 15 by performing cable 12 raising and lowering operations, thereby operating at different depths. The wellbore 15 can reach a depth of several kilometers, including an upper cased hole section 151 and a lower open hole section 152. Wireline sonic logging may enable evaluation of the formation 16 while operating in the open hole section 152.

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

The rotation-preventing short section 141 is interacted with the well wall 153, so that severe reciprocating torsional movement of instruments and cables is prevented, and the reliability of azimuth measurement is ensured. The telemetry sub 142 serves as a control and communication medium between a ground system and the master sub 143, and achieves the measurement function of instrument attitude and natural gamma. The master control sub 143 receives the surface command transmitted from the telemetry sub 142, controls the transmitting acoustic system 146 and the receiving acoustic system 144 to work in order, and uploads data to the telemetry sub 142. The acoustic transmit system 146 integrates monopole and dipole acoustic sources to generate different types of acoustic waves that radiate into the formation. The receiving acoustic system 144 integrates a plurality of receiving transducers and corresponding processing circuits, implements an array azimuth receiving function, and can collect acoustic full-wave train signals from different paths and different strata. For example, the gliding waves 181 in the full wave train can reflect formation information near the borehole wall, and the propagation path, propagation time, and amplitude attenuation of the reflected waves 182 can reflect characteristics of the geologic body 17 near the borehole, such as the size of the geologic body, the distance from the borehole, and the orientation of the geologic body. The sound insulator 145 ensures that the sliding longitudinal wave becomes the first wave of the full wave train by means of grooving and the like, reduces the amplitude of the received direct wave of the instrument shell and improves the signal-to-noise ratio of the logging signal.

During acoustic logging, the instrument is quickly lowered to the bottom of a target well section (close to the bottom of the well), then the logging is lifted to the top of the target well section, then repeated logging is carried out, data quality is checked, and finally the logging is quickly lifted to the ground. The entire process typically takes several hours. During an early stage of logging, the formation 16 and the fluid in the wellbore 15 heat the integrated receiving acoustic train 144, causing the internal ambient temperature at which the electronics in the acoustic train operate to rise. In the middle and later stages of logging, the temperature of the environment in which the electronics operate (and particularly around the heat generating components) can be significantly higher than the temperature of the external environment (the borehole fluid) due to the continuous generation of heat by the heat generating components within the acoustic system. The internal environment of the prior integrated acoustic systems can only dissipate heat to the borehole 15 under the influence of temperature differences and with limited effectiveness. Under the condition, the internal environment temperature of the electronic circuit can greatly exceed the rated working temperature of the components, and the failure rate of the instrument is high.

The present embodiment thus cools the electronics operating environment by constructing a partially insulated chamber 451 in the receiving station of the integrated receiving acoustic system 144 and mounting the electronics inside, and rapidly transferring the heat generated by the electronics to the outside of the insulated chamber through the silicone fluid and the two thermoelectric coolers. The invention solves the cooling problem of the distributed electronic circuit module in the liquid-filled pressure-bearing type integrated receiving acoustic system under the conditions of not increasing the length of the acoustic system and not damaging the modular structure of the acoustic system, and can ensure that an electronic circuit in the acoustic system works in an environment below a specific temperature (lower than the temperature of well bore fluid) for a long time, thereby obviously enhancing the capability and reliability of the integrated acoustic system in long-time working under the condition of ultra-high temperature cable logging and improving the success rate of acoustic logging operation in an ultra-deep high temperature well.

While the present invention has been described in detail with reference to the illustrated embodiments, it should not be construed as limited by the scope of the present invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims (6)

1. An integrated receiving acoustic system structure of acoustic logging who contains cooling module which characterized in that: the system comprises an integrated receiving acoustic system arranged in an acoustic logging instrument string;

the integrated receiving acoustic system comprises a mechanical shell, a capsule, at least one receiving station, an upper interface end, a lower interface end, a mechanical coupling block, an upper conversion connecting joint and a lower conversion connecting joint;

the capsule 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 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 clamping groove clamping and is fixed through a circlip;

the receiving station comprises a receiving station framework, two groups of receiving transducers, a positioning module, an electronic circuit module and a cooling module; the two groups of receiving transducers are arranged on the outer surface of the receiving station framework, and the electronic circuit module and the cooling module are arranged in the framework of the receiving station framework through the positioning module;

each group of receiving transducers comprises 8 receiving transducers, the 8 receiving transducers are arranged on the circumferential direction of the integrated receiving sound system at intervals of 45 degrees, and the receiving transducers are in one-to-one correspondence with the sound transmission windows on the mechanical shell in the circumferential direction;

the signal wire of the receiving transducer is connected with the circuit board through a first wire passing hole in the receiving station framework, a second wire passing hole in the limiting bolt and a third wire passing hole in the electronic circuit framework; the circuit board is mounted on the electronic circuit framework through a second screw;

the positioning module comprises two limiting blocks, a limiting bolt and a limiting nut; the two limiting blocks are arranged on the inner side of the receiving station framework; one side of the limiting bolt is connected with the limiting block, and the other side of the limiting bolt is connected with the electronic circuit framework so as to finely adjust the positions of the cooling module and the electronic circuit module in the axial direction of the receiving station;

the cooling module comprises an adiabatic chamber and a cooler;

the heat insulation chamber is fixed on the electronic circuit framework through limiting nuts on two sides, and the cooler is installed on the heat insulation chamber through a third screw; the electronic circuit framework is positioned in the receiving station framework through a limiting block and a limiting bolt, and both ends of the electronic circuit framework are provided with a line passing channel and a liquid passing channel which are communicated with the outside of the heat insulation chamber;

the heat-insulating chamber comprises a heat-insulating chamber body and two heat-insulating chamber doors; the heat insulation chamber door is in close contact with the heat insulation chamber body through a limit nut.

2. The acoustic logging integrated receiving acoustic structure with cooling module of claim 1, wherein: the cross section of a part of section of the electronic circuit framework in the heat insulation chamber is square, so that 4 simulation channel plates are installed; and the control panel in the heat insulation chamber is fixed in the middle of the electronic circuit framework so as to control 8 analog channel plates.

3. The acoustic logging integrated receiving acoustic structure with cooling module of claim 1, wherein: the cooler is arranged on two installation planes which are arranged in the axial middle part of the heat insulation chamber and are circumferentially spaced by 180 degrees; the hot end of the cooler is arranged on the outer side of the heat insulation chamber, and the cold end of the cooler is arranged on the inner side of the heat insulation chamber; the cooler is a stand-alone cooler; a plurality of individual coolers are cascaded and packaged to form a cascaded cooler; the cooling module comprises at least one independent cooler and at least one cascade cooler; the individual coolers and the cascade coolers are controlled by a cooler control module in the receiving station.

4. The acoustic logging integrated receiving acoustic structure with cooling module of claim 1, wherein: the upper interface end and the lower interface end are fixed on the mechanical shell through first screws, and circulating oil holes are formed in the upper interface end and the lower interface end; and two ends of the capsule are fixedly connected with the upper connector end and the lower connector end through a binding belt.

5. The acoustic logging integrated receiving acoustic structure with cooling module of claim 1, wherein: the upper conversion connecting joint comprises an upper conversion connecting joint main body and 3 female head connectors; the outer part of the upper rotary joint main body is a mechanical cylinder, and a sealing pressure-bearing connector is integrated in the upper rotary joint main body; the mechanical cylinder is provided with a groove type contact surface, and the groove type contact surface is matched with a perfluoro rubber O-shaped ring so as to realize sealing between the upper conversion connecting joint and the upper interface end;

the female head connector is fixed at the axial position of the conversion connector through a circular clamp spring and a positioning pin; one of them female first connector is installed on the right side of sealed pressure-bearing connector, and two other female first connectors are installed on the left side of sealed pressure-bearing connector to convert the electric male head of sealed pressure-bearing connector into electric female head and as the external electric interface of integrated receiving sound system.

6. The acoustic logging integrated receiving acoustic structure with cooling module of claim 1, wherein: the acoustic logging instrument string comprises an anti-rotation short section, a remote measuring short section, a main control short section, an integrated receiving acoustic system, a sound insulator and an integrated transmitting acoustic system which are sequentially arranged from top to bottom; the anti-rotation short section is in contact connection with the well wall; the remote measuring short joint is respectively in communication connection with the ground system and the master control short joint; the master control short section receives a ground command transmitted by the telemetry short section to control the operation of a transmitting sound system and a receiving sound system; the transmitting sound system is integrated with a monopole sound source and a dipole sound source;

the acoustic logging instrument string is connected with one end of a cable, and the other end of the cable is connected with a logging truck on the ground through a pulley on the derrick.

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