High-temperature performance testing device for acoustic logging transducer

Abstract

A high-temperature performance testing device for an acoustic logging transducer comprises an electric heating constant-temperature control unit, a negative pressure constant control unit, a transducer excitation unit, a transducer acquisition unit, a heat-preservation sound-transmission sealed cavity and a standard hydrophone. The electric heating constant temperature control unit, the negative pressure constant control unit and the transducer excitation unit are connected with the heat preservation and sound transmission sealed cavity, and the transducer acquisition unit is connected with the standard hydrophone through a cable; a transducer to be tested is arranged in the heat-preservation sound-transmission sealed cavity, the heat-preservation sound-transmission sealed cavity is filled with high-temperature-resistant liquid, the electric heating constant-temperature control unit is used for heating the high-temperature-resistant liquid to a target temperature and keeping the temperature stable, and the negative-pressure constant control unit is used for removing bubbles in the high-temperature-resistant liquid to keep the pressure constant. The transducer excitation unit is used for exciting the transmitting transducer to transmit acoustic signals, the transducer acquisition unit is used for acquiring the acoustic signals received by the standard hydrophone, and the acoustic signals acquired by the transducer acquisition unit are used for judging the high temperature resistance of the transmitting transducer.

Description

TECHNICAL FIELD

[0001] The utility model relates to belong to acoustic measurement and logging technical technical field, in particular to a kind of high temperature performance testing device for acoustic logging transducer. BACKGROUND

[0002] Acoustic logging transducer is the core component of million-meter deep crust acoustic detection instrument equipment, they often work in downhole high temperature (such as 260 DEG C and above), high pressure (such as 200MPa and above), high corrosiveness (such as hydrogen sulfide gas) and narrow wellbore space (such as diameter less than 200mm) and other harsh environments. Under the above high-temperature harsh working environment, how is the acoustic field performance of acoustic logging transducer, whether its temperature resistance performance meets the demand, all need to give answer before million-meter acoustic logging.

[0003] Therefore, a kind of high temperature performance testing device for acoustic logging transducer is needed, to test whether transducer high temperature performance meets the demand. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of high temperature performance testing device for acoustic logging transducer, utilize the measurement waveform variation characteristic and wave packet energy ratio of acoustic logging transducer, describe the transducer energy variation caused by high temperature, and evaluate.

[0005] Firstly, the present application provides a kind of high temperature performance testing device for acoustic logging transducer, comprising:

[0006] Electric heating thermostatic control unit (1), negative pressure constant control unit (2), transducer excitation unit (3), transducer acquisition unit (4), heat preservation sound transmission sealed cavity (5), standard hydrophone (8);

[0007] Electric heating thermostatic control unit (1), transducer excitation unit (3) and the heat preservation sound transmission sealed cavity (5) are connected by cable, negative pressure constant control unit (2) and the heat preservation sound transmission sealed cavity (5) are connected by pressure-bearing pipe, and transducer acquisition unit (4) and the standard hydrophone (8) are connected by cable;

[0008] The heat preservation sound transmission sealed cavity (5) is hung on a rotating arm, the electric heating constant temperature control unit (1) is used for heating the high-temperature resistant liquid (7) to a target temperature and keeping the temperature stable, the negative pressure constant control unit (2) is used for removing air bubbles in the high-temperature resistant liquid (7) to keep the pressure constant, the transducer excitation unit (3) is used for exciting the transmitting transducer (6) to emit an acoustic signal, and the transducer acquisition unit (4) is used for acquiring the acoustic signal received by the standard hydrophone (8).

[0009] Preferably, the material of the heat preservation sound transmission sealed cavity (5) is a heat preservation sound transmission material, and the high-temperature resistant liquid (7) is silicon oil.

[0010] Specifically, the heat preservation sound transmission sealed cavity (5) comprises:

[0011] The upper end cover (14), the cavity wall (19), the lower end cover (20), and the transducer skeleton (12), the connecting rod (13), the heating resistor (15), the high-temperature resistant oil pump (16), the metal pipe (17), and the temperature sensor (18);

[0012] The transducer skeleton (12) is fixed to the upper end cover (14) through the connecting rod (13), and the transmitting transducer (6) is installed on the transducer skeleton (12);

[0013] The heating resistor (15) is installed on the upper end cover (14), and the electric heating constant temperature control unit (1) heats the silicon oil by controlling the heating resistor (15); the high-temperature resistant oil pump (16) is also installed on the upper end cover (14), the high-temperature resistant oil pump (16) is connected with the metal pipe (17), and the high-temperature resistant oil pump (16) is used for pumping the silicon oil at the bottom of the cavity to the top through the metal pipe (17), so that the silicon oil in the heat preservation sound transmission sealed cavity (5) circulates and flows;

[0014] The temperature sensor (18) is installed on the transducer skeleton (12), the temperature sensor (18) is connected with a temperature controller, and is used for monitoring the temperature in the heat preservation sound transmission sealed cavity (5).

[0015] Specifically, the number of the heating resistors (15) is 4, the length of the heating resistors (15) is 540 mm, the number of the temperature sensors (18) is 6, the material of the upper end cover (14) and the lower end cover (20) is stainless steel, the material of the cavity wall (19) is polyether ether ketone, the thickness of the cavity wall (19) is 10 mm, the inner diameter of the heat-insulating sound-transmitting sealed cavity (5) is 120 mm, and the height of the heat-insulating sound-transmitting sealed cavity (5) is 560 mm.

[0016] Preferably, for judging the high-temperature resistance performance of the transducer, the method comprises:

[0017] According to the sound signal collected by the transducer acquisition unit (4), the first energy value of the first waveform corresponding to the sound signal in the preset first temperature range and the first amplitude value of the first waveform are determined, the second energy value of the second waveform corresponding to the sound signal in the preset second temperature range and the second amplitude value of the second waveform are determined, and according to the first energy value, the second energy value, the first radiation value, the second radiation value and the preset calculation formula of the high-temperature resistance index of the transducer, a first index indicating the high-temperature resistance performance of the transducer is determined.

[0018] The formula of the high-temperature resistance index is:

[0019]

[0020] Wherein, E1 represents the first energy value of the first waveform corresponding to the sound signal in the preset first temperature range, E represents the second energy value of the second waveform corresponding to the sound signal in the preset second temperature range, A1 represents the first amplitude value of the first waveform, A2 represents the second amplitude value of the second waveform, and TI represents the high-temperature resistance index.

[0021] In a second aspect, the application provides a high-temperature performance testing device for a sonic logging transducer, comprising:

[0022] The electric heating constant temperature control unit (1), the negative pressure constant control unit (2), the transducer excitation unit (3), the transducer acquisition unit (4), the heat-insulating sound-transmitting sealed cavity (5), the standard hydrophone (8) and the standard sound source (11);

[0023] The electric heating constant temperature control unit (1), the transducer acquisition unit (4) and the heat-insulating sound-transmitting sealed cavity (5) are connected through cables, the negative pressure constant control unit (2) and the heat-insulating sound-transmitting sealed cavity (5) are connected through a pressure-bearing pipe, the transducer acquisition unit (4) and the standard hydrophone (8) are connected through cables, and the transducer excitation unit (3) and the standard sound source (11) are connected through cables.

[0024] The heat preservation sound transmission sealed cavity (5) is hung on a rotating arm, the electric heating constant temperature control unit (1) is used for heating the high-temperature resistant liquid (7) to a target temperature and keeping the temperature stable, the negative pressure constant control unit (2) is used for removing air bubbles in the high-temperature resistant liquid (7) to keep the pressure constant, the transducer excitation unit (3) is used for exciting the standard sound source (11) to emit a sound signal, and the transducer acquisition unit (4) is used for acquiring the sound signal received by the standard hydrophone (8) and the receiving transducer (10).

[0025] Preferably, the material of the heat preservation sound transmission sealed cavity (5) is a heat preservation sound transmission material, and the high-temperature resistant liquid (7) is silicon oil.

[0026] Specifically, the heat preservation sound transmission sealed cavity (5) comprises:

[0027] The upper end cover (14), the cavity wall (19), the lower end cover (20), and the transducer skeleton (12), the connecting rod (13), the heating resistor (15), the high-temperature resistant oil pump (16), the metal pipe (17), and the temperature sensor (18);

[0028] The transducer skeleton (12) is fixed to the upper end cover (14) through the connecting rod (13), and the receiving transducer (10) is installed on the transducer skeleton (12);

[0029] The heating resistor (15) is installed on the upper end cover (14), and the electric heating constant temperature control unit (1) heats the silicon oil by controlling the heating resistor (15); the high-temperature resistant oil pump (16) is also installed on the upper end cover (14), the high-temperature resistant oil pump (16) is connected with the metal pipe (17), and the high-temperature resistant oil pump (16) is used for pumping the silicon oil at the bottom of the cavity to the top through the metal pipe (17), so that the silicon oil in the heat preservation sound transmission sealed cavity (5) circulates and flows;

[0030] The temperature sensor (18) is installed on the transducer skeleton (12), the temperature sensor (18) is connected with a temperature controller, and is used for monitoring the temperature in the heat preservation sound transmission sealed cavity (5).

[0031] Specifically, the number of the heating resistors (15) is 4, the length is 540 mm, the number of the temperature sensors (18) is 6, the materials of the upper end cover (14) and the lower end cover (20) are stainless steel, the material of the cavity wall (19) is polyether ether ketone, the thickness of the cavity wall (19) is 10 mm, the inner diameter of the heat-preservation sound-transmitting sealed cavity (5) is 120 mm, and the height is 560 mm.

[0032] Preferably, for judging the high-temperature resistance performance of the transducer, the method comprises:

[0033] According to the sound signal collected by the transducer acquisition unit (4), the first energy value of the first waveform corresponding to the sound signal in the preset first temperature range and the first amplitude value of the first waveform are determined, the second energy value of the second waveform corresponding to the sound signal in the preset second temperature range and the second amplitude value of the second waveform are determined, and according to the first energy value, the second energy value, the first radiation value, the second radiation value and the preset calculation formula of the high-temperature resistance index of the transducer, a first index indicating the high-temperature resistance performance of the transducer is determined.

[0034] The high-temperature resistance index calculation formula is:

[0035]

[0036] Wherein, E1 represents the first energy value of the first waveform corresponding to the sound signal in the preset first temperature range, E represents the second energy value of the second waveform corresponding to the sound signal in the preset second temperature range, A1 represents the first amplitude value of the first waveform, A2 represents the second amplitude value of the second waveform, and TI represents the high-temperature resistance index.

[0037] Compared with the prior art, the application has the following advantages: the portable acoustic wave logging transducer high-temperature acoustic performance testing device provided by the application can measure the high-temperature acoustic performance of the transmitting and receiving transducers in a free field; the high-temperature performance evaluation device can effectively evaluate the high-temperature resistance performance of the acoustic wave logging transducer, and provides a technical reference and a new idea for the analysis and evaluation of the high-temperature performance of the acoustic wave logging instrument transducer. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 A transmitting transducer high-temperature acoustic performance test schematic diagram is provided for the embodiments of the application;

[0039] Figure 2 A schematic diagram of a sound wave logging transmitting transducer high-temperature performance testing device is provided for the embodiments of the application;

[0040] Figure 3A schematic diagram of a measured time-domain waveform of the transmitting transducer at different temperatures is provided for the embodiments of the present application.

[0041] Figure 4 A schematic diagram of a high-temperature acoustic performance test of the receiving transducer is provided for the embodiments of the present application.

[0042] Figure 5 A schematic diagram of a high-temperature performance test device of the acoustic logging receiving transducer is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be further described in detail below with the drawings and embodiments.

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described below in conjunction with the drawings. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0045] In the description of the embodiments of the present application, the words such as “exemplary”, “for example”, or “for instance” are used to mean serving as an example, instance or illustration. Any embodiment or design solution described as “exemplary”, “for example” or “for instance” in the embodiments of the present application should not be interpreted as being more preferred or having more advantages than other embodiments or design solutions. Rather, the words “exemplary”, “for example” or “for instance” are used in the sense of presenting a related concept in a specific manner.

[0046] In the description of the embodiments of the present application, the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the technical features indicated. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more of the features. The terms “include”, “contain”, “have” and their variants mean “include but are not limited to”, unless otherwise specifically emphasized.

[0047] In the description of the embodiments of the present application, the terms "horizontal", "vertical", "overhang", "perpendicular" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0048] In addition, in the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "set", "mount", "connect", "connect" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through a medium, or can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0049] At present, the high temperature resistance performance test of acoustic logging transducer generally includes electrical performance test and acoustic performance test. The high temperature resistance electrical performance test is generally to test the admittance characteristics of the transducer at different temperatures, but this small signal measurement method is difficult to reflect the performance of the transducer in the actual working state, and the high temperature resistance acoustic performance test mainly includes the characteristics of important parameters such as emission voltage response (level), receiving sensitivity (level) and horizontal or vertical directivity changing with temperature. Acoustic performance test generally needs auxiliary transducer to realize, and generally uses standard hydrophone as auxiliary transducer, but the standard hydrophone does not have high temperature resistance performance. The device commonly used at present divides the warming box into high temperature zone and normal temperature zone, and the transducer to be tested is put into the high temperature zone, and the auxiliary transducer is put into the normal temperature zone. The disadvantage of the above test is that due to the limited size of the box, it is difficult to meet the free field condition, and there are a large number of reflected waves in the transducer receiving waveform in addition to the direct wave, which seriously affects the test of the acoustic performance of the transducer. At present, the acoustic performance test of the transducer is generally carried out in the free field condition, and the standard hydrophone is used to evaluate the acoustic field characteristics of the transducer to be tested.

[0050] In order to overcome the deficiencies in the prior art, a high temperature performance testing device for acoustic logging transducer is provided. By designing a high temperature performance testing device for acoustic logging receiving transducer, the device mainly includes a heat preservation sound transmission sealing cavity, which can adjust the height, wall thickness and inner diameter size according to the test environment and requirements, including upper and lower end covers, the end cover of the cavity includes an end cover and a sealing ring, which is used to prevent the high temperature resistant liquid (such as silicone oil) in the sealing cavity from being in fluid communication with the fluid outside the sealing cavity, the heating resistance installed in the upper end cover in the cavity, the number of the heating resistance is N (N≥2), the length of the heating resistance can be adjusted according to the size of the transducer skeleton, and the heating resistance is uniformly distributed in the middle of the adjacent transducer in the circumferential direction, so as to avoid the influence of the heating resistance on the measurement of the acoustic performance of the transducer. The sound field characteristics of the transducer to be tested are evaluated by reasonable design.

[0051] A high temperature performance testing device for acoustic logging transducer, comprising: an electric heating constant temperature control unit 1, a negative pressure constant control unit 2, a transducer excitation unit 3, a transducer acquisition unit 4, a heat preservation sound transmission sealing cavity 5, a standard hydrophone 8;

[0052] The electric heating constant temperature control unit 1, the transducer excitation unit 3 and the heat preservation sound transmission sealing cavity 5 are connected by a cable, the negative pressure constant control unit 2 and the heat preservation sound transmission sealing cavity 5 are connected by a pressure bearing pipe, and the transducer acquisition unit 4 and the standard hydrophone 8 are connected by a cable;

[0053] The heat preservation sound transmission sealing cavity 5 is provided with a to-be-tested transmitting transducer 6 and filled with a high temperature resistant liquid 7, the heat preservation sound transmission sealing cavity 5 is hung on a rotating arm, the electric heating constant temperature control unit 1 is used to heat the high temperature resistant liquid 7 to a target temperature and keep the temperature stable, the negative pressure constant control unit 2 is used to remove the bubbles in the high temperature resistant liquid 7 to keep the pressure constant, the transducer excitation unit 3 is used to excite the transmitting transducer 6 to emit acoustic signals, the transducer acquisition unit 4 is used to collect the acoustic signals received by the standard hydrophone 8, and the acoustic signals collected by the transducer acquisition unit 4 are used to judge the high temperature resistant performance of the transmitting transducer 6.

[0054] In a specific embodiment, the material of the heat preservation sound transmission sealing cavity 5 is a heat preservation sound transmission material, and the high temperature resistant liquid 7 is silicone oil.

[0055] Figure 1 A transmitting transducer high temperature acoustic performance testing schematic diagram is provided for the embodiments of the application, as shown in Figure 1As shown, a kind of acoustic logging emission transducer testing device, comprising: electric heating constant temperature control unit 1, negative pressure constant control unit 2, transducer excitation unit 3, transducer acquisition unit 4, heat preservation sound transmission sealed cavity 5, standard hydrophone 8;Electric heating constant temperature control unit 1, transducer excitation unit 3 and heat preservation sound transmission sealed cavity 5 are connected by cable, negative pressure constant control unit 2 and heat preservation sound transmission sealed cavity 5 are connected by pressure-bearing pipe, transducer acquisition unit 4 and standard hydrophone 8 are connected by cable;Emission transducer 6 is installed in heat preservation sound transmission sealed cavity 5, and the cavity is filled with high-temperature silicon oil 7.Electric heating constant temperature control unit 1 can heat the silicon oil 7 in heat preservation sound transmission sealed cavity to target temperature, and can keep temperature uniform and stable, negative pressure constant control unit 2 is used for discharging gas bubble in liquid and other gases generated when heating, can automatically control vacuum pump and electromagnetic valve to work, and keep pressure constant.Heat preservation sound transmission sealed cavity with emission transducer is hung on rotating arm, and standard hydrophone is hung on the platform in the middle of full sound-attenuating pool 9, emission transducer and standard hydrophone are located below 4m of water surface and are fixed during testing, transducer excitation unit 3 excites emission transducer 6 to emit acoustic signal, and transducer acquisition unit 4 collects acoustic signal received by standard hydrophone 8.

[0056] In one specific embodiment, the heat preservation sound transmission sealed cavity 5 includes:

[0057] Upper end cover 14, cavity wall 19, lower end cover 20, and transducer skeleton 12, connecting rod 13, heating resistance 15, high-temperature resistant oil pump 16, metal pipe 17, temperature sensor 18;

[0058] The transducer skeleton 12 is fixed to the upper end cover 14 by the connecting rod 13, and the emission transducer 6 is installed on the transducer skeleton 12;

[0059] The heating resistance 15 is installed on the upper end cover 14, and the electric heating constant temperature control unit 1 heats the silicon oil by controlling the heating resistance 15;The high-temperature resistant oil pump 16 is also installed on the upper end cover 14, the high-temperature resistant oil pump 16 is connected with the metal pipe 17, and the high-temperature resistant oil pump 16 is used to pump the silicon oil at the bottom of the cavity to the top through the metal pipe 17, so that the silicon oil in the heat preservation sound transmission sealed cavity circulates;

[0060] The temperature sensor 18 is installed on the transducer skeleton 12, and the temperature sensor 18 is connected with temperature controller, for monitoring the temperature in the heat preservation sound transmission sealed cavity 5.

[0061] In one specific embodiment, the number of heating resistors 15 is 4 and the length is 540mm, the number of temperature sensors 18 is 6, the upper end cap 14 and the lower end cap 20 are made of stainless steel, the cavity wall 19 is made of polyetheretherketone and the thickness of the cavity wall 19 is 10mm, and the inner diameter of the heat-insulating and sound-permeable sealed cavity 5 is 120mm and the height is 560mm.

[0062] Figure 2 A schematic diagram of a high-temperature performance testing device for an acoustic logging transmitter transducer provided in this application embodiment is shown below. Figure 2 As shown, the transmitting transducer 6 is mounted on the transducer frame 12, which is fixed to the upper end cap 14 of the thermal insulation and acoustically permeable sealed cavity via a connecting rod 13. Heating resistors 15 are installed on the upper end cap 14, and these resistors are evenly distributed circumferentially between adjacent transducers to avoid affecting the measurement of the transducer's acoustic performance. The electric heating constant temperature control unit 1 can heat the high-temperature silicone oil 7 inside the thermal insulation and acoustically permeable sealed cavity 5 using the heating resistors 15. The high-temperature silicone oil 7 has a flash point greater than 300℃. To ensure uniform temperature of the high-temperature silicone oil inside the thermal insulation and acoustically permeable sealed cavity, in this embodiment, it is preferable that the number of heating resistors is four, with a length of 540mm. A high-temperature resistant oil pump 16 is installed on the upper end cap, connected to a metal pipe 17. The oil pump can pump the silicone oil from the bottom of the cavity to the top through the metal pipe, achieving circulation of the silicone oil inside the thermal insulation and acoustically permeable sealed cavity, thereby ensuring uniform and stable temperature inside the cavity. A temperature sensor 18 is mounted on the transducer frame 12. The temperature sensor is connected to a temperature controller to monitor the temperature inside the heat-insulating and sound-permeable sealed cavity. In this embodiment, it is preferred that there are 6 temperature sensors. The upper end cap 14 and the lower end cap 20 of the heat-insulating and sound-permeable sealed cavity are made of stainless steel. To ensure sound transmission and heat insulation, the cavity wall 19 is made of polyetheretherketone (PEEK). PEEK material has an instantaneous operating temperature of up to 306°C and good sound transmission performance in high-temperature environments. In this embodiment, it is preferred that the thickness of the cavity wall 19 is 10 mm. The inner diameter of the heat-insulating and sound-permeable sealed cavity is 120 mm and the height is 560 mm.

[0063] In one embodiment, determining the high-temperature resistance performance of a transducer includes:

[0064] According to the sound signal collected by the transducer acquisition unit 4, the first energy value of the first waveform corresponding to the sound signal in the preset first temperature range and the first amplitude value of the first waveform are determined, the second energy value of the second waveform corresponding to the sound signal in the preset second temperature range and the second amplitude value of the second waveform are determined, and according to the first energy value, the second energy value, the first radiation value, the second radiation value and the preset calculation transducer high-temperature index, the first index indicating the transducer high-temperature performance is determined.

[0065] The high-temperature index calculation formula is:

[0066]

[0067] Wherein, E1 represents the first energy value of the first waveform corresponding to the sound signal in the preset first temperature range, E represents the second energy value of the second waveform corresponding to the sound signal in the preset second temperature range, A1 represents the first amplitude value of the first waveform, A2 represents the second amplitude value of the second waveform, and TI represents the high-temperature index. In different specific embodiments, the specific temperature value range of the first temperature range and the second temperature range can be different. In one specific embodiment, the temperature value in the first temperature range is higher than that in the second temperature range.

[0068] Figure 3 The schematic diagram of the measured time-domain waveform of the transmitting transducer at different temperatures provided by the embodiments of the application is shown in FIG. 1. Figure 3 As shown in FIG. 1, the transmitting voltage response of the transmitting transducer can be calculated according to the time-domain waveform, and the high-temperature performance of the transducer is judged. According to the transducer high-temperature performance evaluation, the transducer high-temperature performance is judged by using the transducer high-temperature index TI (Temperature Index). The TI refers to the energy ratio of a certain time-domain waveform of the transducer at high temperature and at normal temperature, and the time-domain waveform refers to the waveform measured in a free field by using the above test device. The high-temperature index calculation formula is:

[0069]

[0070] Wherein, E1 represents the total energy of the selected measurement waveform at high temperature, E2 represents the total energy of the selected measurement waveform at normal temperature, A represents the amplitude value of the selected measurement waveform at high temperature, A2 represents the amplitude value of the selected measurement waveform at normal temperature, and TI represents the high-temperature index. TI < 1 indicates that the high-temperature performance of the transmitting transducer is weaker than the normal temperature performance; TI > 1 indicates that the high-temperature performance of the transmitting transducer is enhanced compared with the normal temperature performance; TI = 1 indicates that the high-temperature performance of the transmitting transducer is basically the same as the normal temperature performance. According to the high-temperature index calculation formula and the graph on the figure, the high-temperature performance index TI = 1.27 at 205℃ can be calculated, indicating that the high-temperature performance is enhanced.

[0071] In another embodiment, a high-temperature performance testing device for a sonic logging transducer comprises:

[0072] The electric heating constant temperature control unit 1, the negative pressure constant control unit 2, the transducer excitation unit 3, the transducer acquisition unit 4, the heat preservation sound transmission sealed cavity 5, the standard hydrophone 8, and the standard sound source 11.

[0073] The electric heating constant temperature control unit 1, the transducer acquisition unit 4, and the heat preservation sound transmission sealed cavity 5 are connected through a cable, the negative pressure constant control unit 2 and the heat preservation sound transmission sealed cavity 5 are connected through a pressure-bearing pipe, the transducer acquisition unit 4 and the standard hydrophone 8 are connected through a cable, and the transducer excitation unit 3 and the standard sound source 11 are connected through a cable.

[0074] The heat preservation sound transmission sealed cavity 5 is provided with a to-be-tested receiving transducer 10 and filled with a high-temperature resistant liquid 7, the heat preservation sound transmission sealed cavity 5 is hung on a rotating arm, the electric heating constant temperature control unit 1 is used for heating the high-temperature resistant liquid 7 to a target temperature and keeping the temperature stable, the negative pressure constant control unit 2 is used for removing bubbles in the high-temperature resistant liquid 7 to keep the pressure constant, the transducer excitation unit 3 is used for exciting the standard sound source 11 to emit a sound signal, the transducer acquisition unit 4 is used for acquiring the sound signal received by the standard hydrophone 8 and the receiving transducer 10, and the sound signal acquired by the transducer acquisition unit 4 is used for judging the high-temperature performance of the receiving transducer 10.

[0075] In a specific embodiment, the material of the heat preservation sound transmission sealed cavity 5 is a heat preservation sound transmission material, and the high-temperature resistant liquid 7 is silicon oil.

[0076] Figure 4 A receiving transducer high-temperature acoustic performance testing schematic diagram provided by the embodiment is shown in FIG. 1. Figure 4As shown, a test device for a sonic logging transducer includes: an electric heating constant temperature control unit 1, a negative pressure constant control unit 2, a transducer excitation unit 3, a transducer acquisition unit 4, a heat preservation sound transmission sealed cavity 5, a standard hydrophone 8, and a standard sound source 11; the electric heating constant temperature control unit 1, the transducer acquisition unit 4, and the heat preservation sound transmission sealed cavity 5 are connected through a cable, the negative pressure constant control unit 2 and the heat preservation sound transmission sealed cavity 5 are connected through a pressure-bearing pipe, the transducer acquisition unit 4 and the standard hydrophone 8 are connected through a cable, and the transducer excitation unit 3 and the standard sound source 11 are connected through a cable; a receiving transducer 10 is installed in the heat preservation sound transmission sealed cavity 5, and the cavity is filled with high-temperature-resistant silicone oil 7. The electric heating constant temperature control unit 1 can heat the silicone oil 7 in the heat preservation sound transmission sealed cavity to a target temperature and keep the temperature uniform and stable, and the negative pressure constant control unit 2 is used for discharging bubbles in the liquid and other gases generated during heating, automatically controls the work of a vacuum pump and a solenoid valve, and keeps the pressure constant. The heat preservation sound transmission sealed cavity with the receiving transducer and the standard hydrophone 8 are hung on a rotating arm, the standard hydrophone 8 is hung in a full anechoic pool 9 closely to the heat preservation sound transmission sealed cavity, a standard sound source is hung on a platform in the middle of the full anechoic pool 9, the receiving transducer, the standard hydrophone, and the standard sound source are located 4 m below the water surface and are fixed during the test, the transducer excitation unit 3 excites the standard sound source 11 to emit a sound signal, the transducer acquisition unit 4 collects the sound signals received by the receiving transducer 10 and the standard hydrophone 8, and the acoustic performance of the receiving transducer 10 is measured by using a comparison method.

[0077] In a specific embodiment, the heat preservation sound transmission sealed cavity 5 includes:

[0078] The upper end cover 14, the cavity wall 19, the lower end cover 20, the transducer skeleton 12, the connecting rod 13, the heating resistor 15, the high-temperature-resistant oil pump 16, the metal pipe 17, and the temperature sensor 18;

[0079] The transducer skeleton 12 is fixed to the upper end cover 14 through the connecting rod 13, and the receiving transducer 10 is installed on the transducer skeleton 12;

[0080] The heating resistor 15 is installed on the upper end cover 14, the electric heating constant temperature control unit 1 heats the silicone oil by controlling the heating resistor 15, the high-temperature-resistant oil pump 16 is also installed on the upper end cover 14, the high-temperature-resistant oil pump 16 is connected to the metal pipe 17, and the high-temperature-resistant oil pump 16 is used to pump the silicone oil at the bottom of the cavity to the top through the metal pipe 17, so that the silicone oil in the heat preservation sound transmission sealed cavity 5 circulates and flows;

[0081] The temperature sensor 18 is installed on the transducer skeleton 12, the temperature sensor 18 is connected to a temperature controller, and is used to monitor the temperature in the heat preservation sound transmission sealed cavity 5.

[0082] In one specific embodiment, the number of heating resistors 15 is 4 and the length is 540mm, the number of temperature sensors 18 is 6, the upper end cap 14 and the lower end cap 20 are made of stainless steel, the cavity wall 19 is made of polyetheretherketone and the thickness of the cavity wall 19 is 10mm, and the inner diameter of the heat-insulating and sound-permeable sealed cavity is 120mm and the height is 560mm.

[0083] Figure 5 A schematic diagram of a high-temperature performance testing device for an acoustic logging receiver transducer provided in this application embodiment is shown below. Figure 5 As shown, the receiving transducer 10 is mounted on the transducer frame 12, which is fixed to the upper end cap 14 of the heat-insulating and sound-permeable sealed cavity via a connecting rod 13. Heating resistors 15 are installed on the upper end cap 14, and these resistors are evenly distributed circumferentially between adjacent transducers to avoid affecting the measurement of the transducer's acoustic performance. The electric heating constant temperature control unit 1 can heat the high-temperature silicone oil 7 inside the heat-insulating and sound-permeable sealed cavity 5 using the heating resistors 15. The high-temperature silicone oil 7 has a flash point greater than 300℃. To ensure uniform temperature of the high-temperature silicone oil inside the heat-insulating and sound-permeable sealed cavity, in this embodiment, it is preferable that the number of heating resistors is four, with a length of 540mm. A high-temperature resistant oil pump 16 is installed on the upper end cap, connected to a metal pipe 17. The oil pump can pump the silicone oil from the bottom of the cavity to the top through the metal pipe, achieving circulation of the silicone oil inside the heat-insulating and sound-permeable sealed cavity, thereby ensuring uniform and stable temperature inside the cavity. A temperature sensor 18 is mounted on the transducer frame 12. The temperature sensor 18 is connected to a temperature controller to monitor the temperature inside the heat-insulating and sound-permeable sealed cavity. In this embodiment, it is preferred that there are 6 temperature sensors 18. The upper end cap 14 and the lower end cap 20 of the heat-insulating and sound-permeable sealed cavity are made of stainless steel. To ensure sound transmission and heat insulation, the cavity wall 19 is made of polyetheretherketone (PEEK). PEEK material has an instantaneous operating temperature of up to 306°C and good sound transmission performance in high-temperature environments. In this embodiment, it is preferred that the thickness of the cavity wall 19 is 10 mm. The inner diameter of the heat-insulating and sound-permeable sealed cavity 5 is 120 mm and the height is 560 mm.

[0084] In one embodiment, determining the high-temperature resistance performance of a transducer includes:

[0085] According to the sound signal collected by the transducer collection unit 4, the first energy value of the first waveform corresponding to the sound signal in the preset first temperature range and the first amplitude value of the first waveform are determined, the second energy value of the second waveform corresponding to the sound signal in the preset second temperature range and the second amplitude value of the second waveform are determined, and according to the first energy value, the second energy value, the first radiation value, the second radiation value and the preset calculation transducer high-temperature index, a first index indicating the transducer high-temperature performance is determined.

[0086] The high-temperature index calculation formula is:

[0087]

[0088] Wherein, E1 represents the first energy value of the first waveform corresponding to the sound signal in the preset first temperature range, E represents the second energy value of the second waveform corresponding to the sound signal in the preset second temperature range, A1 represents the first amplitude value of the first waveform, A2 represents the second amplitude value of the second waveform, and TI represents the high-temperature index. In different specific embodiments, the specific temperature value range of the first temperature range and the second temperature range can be different. In one specific embodiment, the temperature value in the first temperature range is higher than that in the second temperature range.

[0089] For example, and Figure 3 Similar graphs can be obtained by experiments, and the acoustic performance of the receiving transducer 10 can be measured by comparison method.

[0090] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A high-temperature performance testing device for acoustic logging transducers, comprising: an electric heating constant temperature control unit (1), a negative pressure constant control unit (2), a transducer excitation unit (3), a transducer acquisition unit (4), a heat-insulating sound-transmitting sealed cavity (5), and a standard hydrophone (8); the electric heating constant temperature control unit (1) and the transducer excitation unit (3) are connected to the heat-insulating sound-transmitting sealed cavity (5) through a cable, the negative pressure constant control unit (2) is connected to the heat-insulating sound-transmitting sealed cavity (5) through a pressure-bearing pipe, and the transducer acquisition unit (4) is connected to the standard hydrophone (8) through a cable; the heat-insulating sound-transmitting sealed cavity (5) is provided with a to-be-tested transmitting transducer (6) and filled with a high-temperature resistant liquid (7), the heat-insulating sound-transmitting sealed cavity (5) is hung on a rotating arm, the electric heating constant temperature control unit (1) is used for heating the high-temperature resistant liquid (7) to a target temperature and keeping the temperature stable, the negative pressure constant control unit (2) is used for removing air bubbles in the high-temperature resistant liquid (7) to keep the pressure constant, the transducer excitation unit (3) is used for exciting the transmitting transducer (6) to emit an acoustic signal, and the transducer acquisition unit (4) is used for acquiring the acoustic signal received by the standard hydrophone (8), wherein the acoustic signal acquired by the transducer acquisition unit (4) is used for judging the high-temperature performance of the transmitting transducer (6).

2. The apparatus of claim 1, wherein, The heat-insulating sound-transmitting sealed cavity (5) is made of a heat-insulating sound-transmitting material, and the high-temperature resistant liquid (7) is silicon oil. 3.The device according to claim 2, wherein the heat-insulating sound-transmitting sealed cavity (5) comprises: an upper end cover (14), a cavity wall (19), and a lower end cover (20), and a transducer skeleton (12), a connecting rod (13), a heating resistor (15), a high-temperature resistant oil pump (16), a metal pipe (17), and a temperature sensor (18); the transducer skeleton (12) is fixed to the upper end cover (14) through the connecting rod (13), and the transmitting transducer (6) is installed on the transducer skeleton (12); the heating resistor (15) is installed on the upper end cover (14), the electric heating constant temperature control unit (1) heats the silicon oil by controlling the heating resistor (15); the high-temperature resistant oil pump (16) is also installed on the upper end cover (14), the high-temperature resistant oil pump (16) is connected to the metal pipe (17), and the high-temperature resistant oil pump (16) is used for pumping the silicon oil at the bottom of the cavity to the top through the metal pipe (17) to make the silicon oil in the heat-insulating sound-transmitting sealed cavity (5) circulate; the temperature sensor (18) is installed on the transducer skeleton (12) and connected to a temperature controller for monitoring the temperature in the heat-insulating sound-transmitting sealed cavity (5).

4. The apparatus of claim 3, wherein, The number of the heating resistors (15) is 4, the length is 540 mm, the number of the temperature sensors (18) is 6, the material of the upper end cover (14) and the lower end cover (20) is stainless steel, the material of the cavity wall (19) is polyether ether ketone, the thickness of the cavity wall (19) is 10 mm, the inner diameter of the heat preservation sound transmission sealed cavity is 120 mm, and the height is 560 mm.

5. A high-temperature performance testing device for an acoustic logging transducer, comprising: an electric heating constant temperature control unit (1), a negative pressure constant control unit (2), a transducer excitation unit (3), a transducer acquisition unit (4), a heat preservation sound transmission sealed cavity (5), a standard hydrophone (8), and a standard sound source (11); the electric heating constant temperature control unit (1), the transducer acquisition unit (4), and the heat preservation sound transmission sealed cavity (5) are connected through a cable, the negative pressure constant control unit (2) and the heat preservation sound transmission sealed cavity (5) are connected through a pressure-bearing pipe, the transducer acquisition unit (4) and the standard hydrophone (8) are connected through a cable, and the transducer excitation unit (3) and the standard sound source (11) are connected through a cable; the heat preservation sound transmission sealed cavity (5) is provided with a receiving transducer (10) to be tested and filled with a high-temperature resistant liquid (7), the heat preservation sound transmission sealed cavity (5) is hung on a rotating arm, the electric heating constant temperature control unit (1) is used for heating the high-temperature resistant liquid (7) to a target temperature and keeping the temperature stable, the negative pressure constant control unit (2) is used for removing bubbles in the high-temperature resistant liquid (7) to keep the pressure constant, the transducer excitation unit (3) is used for exciting the standard sound source (11) to emit an acoustic signal, and the transducer acquisition unit (4) is used for collecting the acoustic signal received by the standard hydrophone (8) and the receiving transducer (10), and the acoustic signal collected by the transducer acquisition unit (4) is used for judging the high-temperature resistance performance of the receiving transducer (10).

6. The apparatus of claim 5, wherein, The material of the heat preservation sound transmission sealed cavity (5) is a heat preservation sound transmission material, and the high-temperature resistant liquid (7) is silicon oil.

7. The device according to claim 6, wherein the heat preservation sound transmission sealed cavity (5) comprises: an upper end cover (14), a cavity wall (19), and a lower end cover (20), and a transducer skeleton (12), a connecting rod (13), a heating resistor (15), a high-temperature resistant oil pump (16), a metal pipe (17), and a temperature sensor (18); the transducer skeleton (12) is fixed to the upper end cover (14) through the connecting rod (13), and the receiving transducer (10) is installed on the transducer skeleton (12); The upper end cover (14) is provided with the heating resistor (15), and the electric heating constant temperature control unit (1) heats the silicon oil by controlling the heating resistor (15); the upper end cover (14) is also provided with the high-temperature-resistant oil pump (16), the high-temperature-resistant oil pump (16) is connected with the metal pipe (17), and the high-temperature-resistant oil pump (16) is used for pumping the silicon oil at the bottom of the cavity to the top through the metal pipe (17), so that the silicon oil in the heat preservation sound transmission sealed cavity (5) circulates and flows. The temperature sensor (18) is arranged on the transducer skeleton (12) and connected with the temperature controller, and used for monitoring the temperature in the heat preservation sound transmission sealed cavity (5).

8. The apparatus of claim 7, wherein, The number of the heating resistors (15) is 4, the length is 540 mm, the number of the temperature sensors (18) is 6, the materials of the upper end cover (14) and the lower end cover (20) are stainless steel, the material of the cavity wall (19) is polyether ether ketone, the thickness of the cavity wall (19) is 10 mm, and the inner diameter of the heat preservation sound transmission sealed cavity (5) is 120 mm and the height is 560 mm.

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