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 invention belongs to the technical field of acoustic measurement and well logging technology, and in particular to a high temperature performance testing device for an acoustic well logging transducer. Background Art

[0002] Acoustic logging transducers are the core components of acoustic detection equipment for deep crust at the 10,000-meter level. They often have to work in harsh environments such as high temperature (such as 260°C and above), high pressure (such as 200MPa and above), high corrosion (such as hydrogen sulfide gas), and narrow wellbore space (such as diameter less than 200mm). In the above high-temperature and harsh working environment, the acoustic field performance of the acoustic logging transducer and whether its temperature resistance meets the requirements need to be answered before the 10,000-meter acoustic logging.

[0003] Therefore, a high temperature performance test device for an acoustic logging transducer is needed to test whether the high temperature performance of the transducer meets the requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a high temperature performance testing device for an acoustic logging transducer, which uses the measurement waveform change characteristics and wave packet energy ratio of the acoustic logging transducer to characterize and evaluate the transducer energy change caused by high temperature.

[0005] In a first aspect, the present invention provides a high temperature performance testing device for an acoustic logging transducer, comprising:

[0006] An electric heating constant temperature control unit (1), a negative pressure constant control unit (2), a transducer excitation unit (3), a transducer collection unit (4), a heat-insulating sound-transmitting sealed cavity (5), and a standard hydrophone (8);

[0007] The electric heating constant temperature control unit (1), the transducer excitation unit (3) and the heat-insulating sound-transmitting sealed cavity (5) are connected via cables, the negative pressure constant control unit (2) and the heat-insulating sound-transmitting sealed cavity (5) are connected via a pressure-bearing pipe, and the transducer acquisition unit (4) and the standard hydrophone (8) are connected via cables;

[0008] The heat-insulating and sound-transmitting sealed cavity (5) is provided with a transmitting transducer (6) to be tested and is filled with a high-temperature resistant liquid (7). The heat-insulating and sound-transmitting sealed 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 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 a sound signal. The transducer acquisition unit (4) is used to acquire the sound signal received by the standard hydrophone (8). The sound signal acquired by the transducer acquisition unit (4) is used to judge the high-temperature resistance performance of the transmitting transducer (6).

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

[0010] Specifically, the heat-insulating and sound-transmitting sealed cavity (5) comprises:

[0011] An upper end cover (14), a cavity wall (19), a lower end cover (20), a transducer frame (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);

[0012] The transducer frame (12) is fixed to the upper end cover (14) via a connecting rod (13), and the transmitting transducer (6) is mounted on the transducer frame (12);

[0013] The heating resistor (15) is mounted on the upper end cover (14), and 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 mounted on the upper end cover (14), and the high temperature resistant oil pump (16) is connected to the metal pipe (17). 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-insulating and sound-transmitting sealing cavity (5) circulates;

[0014] The temperature sensor (18) is mounted on the transducer frame (12), and the temperature sensor (18) is connected to a temperature controller for monitoring the temperature inside the heat-insulating and sound-transmitting sealed cavity (5).

[0015] Specifically, the number of the heating resistors (15) is 4 and 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 polyetheretherketone, the thickness of the cavity wall (19) is 10 mm, and the inner diameter of the thermal insulation and sound-transmitting sealed cavity (5) is 120 mm and the height is 560 mm.

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

[0017] Determine, based on the acoustic signal collected by the transducer collection unit (4), a first energy value of a first waveform corresponding to the acoustic signal and a first amplitude value of the first waveform within a preset first temperature range, determine a second energy value of a second waveform corresponding to the acoustic signal and a second amplitude value of the second waveform within a preset second temperature range, and determine, based on the first energy value, the second energy value, the first radiation value, the second radiation value and a preset calculated transducer high temperature resistance index, a first indicator indicating the high temperature resistance performance of the transducer;

[0018] The high temperature resistance index calculation formula is:

[0019]

[0020] Among them, E 1 represents a first energy value of a first waveform corresponding to the acoustic signal within a preset first temperature range, E represents a second energy value of a second waveform corresponding to the acoustic signal within a preset second temperature range, and A 1 represents the first amplitude value of the first waveform, A 2 represents the second amplitude value of the second waveform, and TI represents a high temperature resistance index.

[0021] In a second aspect, the present invention provides a high temperature performance testing device for an acoustic logging transducer, comprising:

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

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

[0024] The heat-insulating sound-transmitting sealed cavity (5) is provided with a receiving transducer (10) to be tested and is 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 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 bubbles in the high-temperature resistant liquid (7) to keep the pressure constant. The transducer excitation unit (3) is used to excite the standard sound source (11) to emit a sound signal. The transducer acquisition unit (4) is used to acquire the sound signals received by the standard hydrophone (8) and the receiving transducer (10). The sound signals acquired by the transducer acquisition unit (4) are used to judge the high-temperature resistance performance of the receiving transducer (10).

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

[0026] Specifically, the heat-insulating and sound-transmitting sealed cavity (5) comprises:

[0027] An upper end cover (14), a cavity wall (19), a lower end cover (20), a transducer frame (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);

[0028] The transducer frame (12) is fixed to the upper end cover (14) via a connecting rod (13), and the receiving transducer (10) is mounted on the transducer frame (12);

[0029] The heating resistor (15) is mounted on the upper end cover (14), and 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 mounted on the upper end cover (14), and the high temperature resistant oil pump (16) is connected to the metal pipe (17). 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-insulating and sound-transmitting sealing cavity (5) circulates;

[0030] The temperature sensor (18) is mounted on the transducer frame (12), and the temperature sensor (18) is connected to a temperature controller for monitoring the temperature inside the heat-insulating and sound-transmitting sealed cavity (5).

[0031] Specifically, the number of the heating resistors (15) is 4 and 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 polyetheretherketone, the thickness of the cavity wall (19) is 10 mm, and the inner diameter of the thermal insulation and sound-transmitting sealed cavity (5) is 120 mm and the height is 560 mm.

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

[0033] Determine, based on the acoustic signal collected by the transducer collection unit (4), a first energy value of a first waveform corresponding to the acoustic signal and a first amplitude value of the first waveform within a preset first temperature range, determine a second energy value of a second waveform corresponding to the acoustic signal and a second amplitude value of the second waveform within a preset second temperature range, and determine, based on the first energy value, the second energy value, the first radiation value, the second radiation value and a preset calculated transducer high temperature resistance index, a first indicator indicating the high temperature resistance performance of the transducer;

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

[0035]

[0036] Among them, E 1 represents a first energy value of a first waveform corresponding to the acoustic signal within a preset first temperature range, E represents a second energy value of a second waveform corresponding to the acoustic signal within a preset second temperature range, and A 1 represents the first amplitude value of the first waveform, A 2 represents the second amplitude value of the second waveform, and TI represents a high temperature resistance index.

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

[0038] Figure 1 A schematic diagram of a high-temperature acoustic performance test of a transmitting transducer provided in an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of a high temperature performance testing device for an acoustic logging transmitting transducer provided in an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of the time domain waveform of the transmitting transducer at different temperatures obtained by measurement according to an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of a high-temperature acoustic performance test of a receiving transducer provided in an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of a high temperature performance testing device for an acoustic logging receiving transducer provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

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

[0045] In the description of the embodiments of the present invention, words such as "exemplary", "for example" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a concrete way.

[0046] In the description of the embodiments of the present application, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

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

[0048] In addition, in the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] At present, the high temperature performance test methods of acoustic logging transducers usually include two methods: electrical performance test and acoustic performance test. The high temperature electrical performance test generally tests the electrical admittance characteristics of the transducer at different temperatures, but this small signal measurement method is difficult to reflect the performance of the transducer under actual working conditions. The high temperature acoustic performance test mainly includes the characteristics of important parameters such as the transmission voltage response (level), receiving sensitivity (level) and horizontal or vertical directivity changing with temperature. Acoustic performance testing generally requires auxiliary transducers to be implemented. Standard hydrophones are usually used as auxiliary transducers, but standard hydrophones do not have high temperature resistance. The method commonly used at present divides the heating box into a high temperature zone and a normal temperature zone. The transducer to be tested is placed in the high temperature zone and the auxiliary transducer is placed in the normal temperature zone. The disadvantage of the above test method is that due to the limited size of the box, it is difficult to meet the free field conditions. In addition to the direct wave, there are also a large number of reflected waves in the waveform received by the transducer, 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 under free field conditions, using a standard hydrophone to evaluate the acoustic field characteristics of the transducer to be tested.

[0050] In order to overcome the shortcomings of the prior art, a high temperature performance test device for acoustic logging transducers is proposed. A high temperature performance test device for acoustic logging receiving transducers is designed. The device mainly includes a heat-insulating and sound-transmitting sealed cavity, which can adjust the height, wall thickness, and inner diameter according to the test environment and requirements, including upper and lower end covers, and the end covers of the cavity include end covers and sealing rings. The end covers and sealing rings are used to prevent the high temperature resistant liquid (such as silicone oil) in the sealed cavity from communicating with the fluid outside the sealed cavity. The heating resistor in the cavity is installed on the upper end cover, and the number of the heating resistors is N (N≥2). The heating resistor has a certain length, and the length can be adjusted according to the size of the transducer frame. The heating resistors are evenly distributed in the middle of adjacent transducers in the circumferential direction to avoid the heating resistors affecting the measurement of the acoustic performance of the transducer. The acoustic field characteristics of the transducer to be tested are evaluated through reasonable design.

[0051] A high temperature performance test 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-insulating sound-transmitting sealed cavity 5, and a standard hydrophone 8;

[0052] The electric heating constant temperature control unit 1, the transducer excitation unit 3 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, and the transducer acquisition unit 4 and the standard hydrophone 8 are connected through cables;

[0053] The thermally-insulated and sound-transmitting sealed cavity 5 is provided with a transmitting transducer 6 to be tested and is filled with a high-temperature resistant liquid 7. The thermally-insulated and sound-transmitting sealed 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 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 an acoustic signal. The transducer acquisition unit 4 is used to acquire the acoustic signal received by the standard hydrophone 8. The acoustic signal acquired by the transducer acquisition unit 4 is used to judge the high-temperature resistance of the transmitting transducer 6.

[0054] In a specific embodiment, the material of the thermal insulation and sound-transmitting sealing cavity 5 is a thermal insulation and sound-transmitting material, and the high temperature resistant liquid 7 is silicone oil.

[0055] Figure 1 A schematic diagram of a high temperature acoustic performance test of a transmitting transducer provided in an embodiment of the present invention, such as Figure 1As shown, a high temperature performance test device for acoustic logging transmitting transducer comprises: 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, the transducer excitation unit 3 and the heat-insulating sound-transmitting sealed cavity 5 are connected by cables, the negative pressure constant control unit 2 and the heat-insulating sound-transmitting sealed cavity 5 are connected by a pressure-bearing pipe, and the transducer acquisition unit 4 and the standard hydrophone 8 are connected by cables; the transmitting transducer 6 is installed in the heat-insulating sound-transmitting 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-insulating sound-transmitting sealed cavity to the target temperature and keep the temperature uniform and stable. The negative pressure constant control unit 2 is used to discharge bubbles in the liquid and other gases generated during heating, and can automatically control the vacuum pump and the solenoid valve to work and keep the pressure constant. The heat-insulating, sound-transmitting and sealed cavity equipped with the transmitting transducer is hung on the rotating arm, and the standard hydrophone is hung on the platform in the middle of the fully anechoic pool 9. During the test, the transmitting transducer and the standard hydrophone are both located 4m below the water surface and fixed. The transducer excitation unit 3 excites the transmitting transducer 6 to transmit the sound signal, and the transducer acquisition unit 4 acquires the sound signal received by the standard hydrophone 8.

[0056] In a specific embodiment, the thermal insulation and sound-transmitting sealed cavity 5 includes:

[0057] The upper end cover 14, the cavity wall 19, the lower end cover 20, as well as the transducer frame 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;

[0058] The transducer frame 12 is fixed to the upper end cover 14 through a connecting rod 13, and the transmitting transducer 6 is mounted on the transducer frame 12;

[0059] The heating resistor 15 is installed on the upper end cover 14, and 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, and the high temperature resistant oil pump 16 is connected to the metal pipe 17. 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-insulating and sound-transmitting sealing cavity circulates;

[0060] The temperature sensor 18 is mounted on the transducer frame 12 , and the temperature sensor 18 is connected to a temperature controller for monitoring the temperature inside the heat-insulating and sound-transmitting sealed cavity 5 .

[0061] In a specific embodiment, the number of the heating resistors 15 is 4 and 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 polyetheretherketone, the thickness of the cavity wall 19 is 10 mm, and the inner diameter of the thermal insulation and sound-transmitting sealed cavity 5 is 120 mm and the height is 560 mm.

[0062] Figure 2 A schematic diagram of a high temperature performance test device for an acoustic logging transmitting transducer provided in an embodiment of the present invention is shown in FIG. Figure 2 As shown, the transmitting transducer 6 is mounted on the transducer frame 12, and the frame is fixed to the upper end cover 14 of the heat-insulating sound-transmitting sealed cavity by a connecting rod 13. A heating resistor 15 is installed on the upper end cover 14, and the heating resistor 15 is evenly distributed in the middle of adjacent transducers in the circumferential direction to avoid the heating resistor 15 affecting the measurement of the acoustic performance of the transducer. The electric heating constant temperature control unit 1 can heat the high-temperature silicone oil 7 in the heat-insulating sound-transmitting sealed cavity 5 through the heating resistor 15. The flash point of the high-temperature silicone oil 7 is greater than 300°C. In order to ensure the uniform temperature of the high-temperature silicone oil in the heat-insulating sound-transmitting sealed cavity, in the embodiment of the present invention, the number of the heating resistors is preferably 4 and the length is 540mm. A high-temperature resistant oil pump 16 is installed on the upper end cover, and the oil pump is connected to a metal pipe 17. The oil pump can pump the silicone oil at the bottom of the cavity to the top through the metal pipe to realize the circulation of the silicone oil in the heat-insulating sound-transmitting sealed cavity, thereby ensuring the uniform and stable temperature in the heat-insulating sound-transmitting sealed 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 in the heat-insulating sound-permeable sealed cavity. In the embodiment of the present invention, the number of the temperature sensors is preferably 6. The upper end cap 14 and the lower end cap 20 of the heat-insulating sound-permeable sealed cavity are made of stainless steel. In order to ensure the sound-permeable and heat-insulating functions, the cavity wall 19 is made of polyetheretherketone (PEEK). The instantaneous use temperature of the PEEK material can reach 306°C and has good sound-permeable performance in a high temperature environment. In the embodiment of the present invention, the thickness of the cavity wall 19 is preferably 10 mm. The inner diameter of the heat-insulating sound-permeable sealed cavity is 120 mm and the height is 560 mm.

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

[0064] According to the acoustic signal collected by the transducer acquisition unit 4, a first energy value of a first waveform corresponding to the acoustic signal and a first amplitude value of the first waveform within a preset first temperature range are determined, and a second energy value of a second waveform corresponding to the acoustic signal and a second amplitude value of the second waveform within a preset second temperature range are determined; according to the first energy value, the second energy value, the first radiation value, the second radiation value and a preset calculated transducer high temperature resistance index, a first indicator indicating the high temperature resistance performance of the transducer is determined;

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

[0066]

[0067] Among them, E 1 represents a first energy value of a first waveform corresponding to the acoustic signal within a preset first temperature range, E represents a second energy value of a second waveform corresponding to the acoustic signal within a preset second temperature range, and A 1 represents the first amplitude value of the first waveform, A 2 represents the second amplitude value of the second waveform, and TI represents the high temperature resistance index. In different specific embodiments, the specific temperature value ranges of the first temperature range and the second temperature range may be different. In a specific embodiment, the temperature value in the first temperature range is higher than the temperature value in the second temperature range.

[0068] Figure 3 The schematic diagram of the time domain waveform of the transmitting transducer at different temperatures obtained by measurement provided by the embodiment of the present invention is as follows: Figure 3 As shown, the transmitting voltage response of the transmitting transducer can be calculated based on the time domain waveform to judge the high temperature performance of the transducer. The high temperature resistance index TI (Temperature Index) of the transducer is used to evaluate the high temperature performance of the transducer to judge the high temperature resistance performance of the transducer. The TI refers to the energy ratio of a certain section of the time domain waveform of the transducer at high temperature and normal temperature. The time domain waveform refers to the waveform measured in a free field using the above-mentioned test device. The high temperature resistance index calculation formula is:

[0069]

[0070] Among them, E 1 Represents the total energy of the selected measurement waveform at high temperature, E 2 represents the total energy of the selected measurement waveform at room temperature, A represents the amplitude value of the selected measurement waveform at high temperature, and A 2It represents the amplitude value of the selected measurement waveform at room temperature, TI represents the high temperature resistance index; TI<1, indicating that the high temperature performance of the transmitting transducer is weakened compared with the normal temperature performance; TI>1, indicating that the high temperature performance of the transmitting transducer is enhanced compared with the normal temperature performance; TI=1, indicating that the high temperature performance and the normal temperature performance of the transmitting transducer are basically the same. According to the high temperature resistance index calculation formula and the graph on the figure, it can be calculated that the high temperature performance index TI=1.27 at 205℃, indicating that the high temperature performance is enhanced.

[0071] In another embodiment, a testing device for an acoustic logging transducer includes:

[0072] Electric heating constant temperature control unit 1, negative pressure constant control unit 2, transducer excitation unit 3, transducer collection unit 4, heat-insulating sound-transmitting sealed cavity 5, standard hydrophone 8, standard sound source 11;

[0073] The electric heating constant temperature control unit 1, the transducer collection 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 collection 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;

[0074] The heat-insulating and sound-transmitting sealed cavity 5 is provided with a receiving transducer 10 to be tested and is filled with a high-temperature resistant liquid 7. The heat-insulating and sound-transmitting sealed 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 bubbles in the high-temperature resistant liquid 7 to keep the pressure constant. The transducer excitation unit 3 is used to excite the standard sound source 11 to emit a sound signal. The transducer acquisition unit 4 is used to collect the sound signals received by the standard hydrophone 8 and the receiving transducer 10. The sound signals collected by the transducer acquisition unit 4 are used to judge the high-temperature resistance performance of the receiving transducer 10.

[0075] In a specific embodiment, the material of the thermal insulation and sound-transmitting sealing cavity 5 is a thermal insulation and sound-transmitting material, and the high temperature resistant liquid 7 is silicone oil.

[0076] Figure 4 A schematic diagram of a high temperature acoustic performance test of a receiving transducer provided in an embodiment of the present invention, such as Figure 4As shown, a high temperature performance test device for an acoustic logging transducer comprises: 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, 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-insulating sound-transmitting sealed cavity 5 are connected by cables, the negative pressure constant control unit 2 and the heat-insulating sound-transmitting sealed cavity 5 are connected by a pressure-bearing pipe, the transducer acquisition unit 4 and the standard hydrophone 8 are connected by cables, and the transducer excitation unit 3 and the standard sound source 11 are connected by cables; the receiving transducer 10 is installed in the heat-insulating sound-transmitting 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-insulating sound-transmitting sealed cavity to the target temperature and keep the temperature uniform and stable, and the negative pressure constant control unit 2 is used to discharge bubbles in the liquid and other gases generated during heating, automatically control the vacuum pump and the solenoid valve to work, and keep the pressure constant. The heat-insulating sound-transmitting sealed cavity equipped with the receiving transducer and the standard hydrophone 8 are hung on the rotating arm, the standard hydrophone 8 is hung in the full anechoic water pool 9 close to the heat-insulating sound-transmitting sealed cavity, and the standard sound source is hung on the platform in the middle of the full anechoic water pool 9. During the test, the receiving transducer, the standard hydrophone and the standard sound source are all located 4m below the water surface and fixed, the transducer excitation unit 3 excites the standard sound source 11 to emit sound signals, the transducer acquisition unit 4 acquires 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 the comparison method.

[0077] In a specific embodiment, the thermal insulation and sound-transmitting sealed cavity 5 includes:

[0078] The upper end cover 14, the cavity wall 19, the lower end cover 20, as well as the transducer frame 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 frame 12 is fixed to the upper end cover 14 through a connecting rod 13, and the receiving transducer 10 is mounted on the transducer frame 12;

[0080] The heating resistor 15 is installed on the upper end cover 14, and 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, and the high temperature resistant oil pump 16 is connected to the metal pipe 17. 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-insulating and sound-transmitting sealing cavity 5 circulates;

[0081] The temperature sensor 18 is mounted on the transducer frame 12 , and the temperature sensor 18 is connected to a temperature controller for monitoring the temperature inside the heat-insulating and sound-transmitting sealed cavity 5 .

[0082] In a specific embodiment, the number of the heating resistors 15 is 4 and 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 polyetheretherketone, the thickness of the cavity wall 19 is 10 mm, and the inner diameter of the thermal insulation and sound-transmitting sealed cavity is 120 mm and the height is 560 mm.

[0083] Figure 5 A schematic diagram of a high temperature performance test device for an acoustic logging receiving transducer provided in an embodiment of the present invention is shown in FIG. Figure 5 As shown, the receiving transducer 10 is mounted on the transducer frame 12, and the frame is fixed to the upper end cover 14 of the heat-insulating sound-transmitting sealed cavity by a connecting rod 13. A heating resistor 15 is installed on the upper end cover 14, and the heating resistor 15 is evenly distributed in the middle of adjacent transducers in the circumferential direction to avoid the heating resistor 15 affecting the measurement of the acoustic performance of the transducer. The electric heating constant temperature control unit 1 can heat the high-temperature silicone oil 7 in the heat-insulating sound-transmitting sealed cavity 5 through the heating resistor 15. The flash point of the high-temperature silicone oil 7 is greater than 300°C. In order to ensure the uniform temperature of the high-temperature silicone oil in the heat-insulating sound-transmitting sealed cavity, in the embodiment of the present invention, the number of the heating resistors is preferably 4 and the length is 540mm. A high-temperature resistant oil pump 16 is installed on the upper end cover, and the oil pump is connected to a metal pipe 17. The oil pump can pump the silicone oil at the bottom of the cavity to the top through the metal pipe to realize the circulation of the silicone oil in the heat-insulating sound-transmitting sealed cavity, thereby ensuring the uniform and stable temperature in the heat-insulating sound-transmitting sealed 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 in the heat-insulating sound-transmitting sealed cavity. In the embodiment of the present invention, the number of the temperature sensors 18 is preferably 6. The upper end cover 14 and the lower end cover 20 of the heat-insulating sound-transmitting sealed cavity are made of stainless steel. In order to ensure the sound-transmitting and heat-insulating functions, the cavity wall 19 is made of polyetheretherketone (PEEK). The instantaneous use temperature of the PEEK material can reach 306°C and has good sound-transmitting performance in a high temperature environment. In the embodiment of the present invention, the thickness of the cavity wall 19 is preferably 10 mm. The inner diameter of the heat-insulating sound-transmitting sealed cavity 5 is 120 mm and the height is 560 mm.

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

[0085] According to the acoustic signal collected by the transducer acquisition unit 4, a first energy value of a first waveform corresponding to the acoustic signal and a first amplitude value of the first waveform within a preset first temperature range are determined, and a second energy value of a second waveform corresponding to the acoustic signal and a second amplitude value of the second waveform within a preset second temperature range are determined; according to the first energy value, the second energy value, the first radiation value, the second radiation value and a preset calculated transducer high temperature resistance index, a first indicator indicating the high temperature resistance performance of the transducer is determined;

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

[0087]

[0088] Among them, E 1 represents a first energy value of a first waveform corresponding to the acoustic signal within a preset first temperature range, E represents a second energy value of a second waveform corresponding to the acoustic signal within a preset second temperature range, and A 1 represents the first amplitude value of the first waveform, A 2 represents the second amplitude value of the second waveform, and TI represents the high temperature resistance index. In different specific embodiments, the specific temperature value ranges of the first temperature range and the second temperature range may be different. In a specific embodiment, the temperature value in the first temperature range is higher than the temperature value in the second temperature range.

[0089] For example, we can experimentally obtain Figure 3 Similar graphs are used to measure the acoustic performance of the receiving transducer 10 using the comparison method.

[0090] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. 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 collection unit (4), a heat-insulating sound-transmitting sealed cavity (5), and a standard hydrophone (8); The electric heating constant temperature control unit (1), the transducer excitation unit (3) and the heat-insulating sound-transmitting sealed cavity (5) are connected via cables, the negative pressure constant control unit (2) and the heat-insulating sound-transmitting sealed cavity (5) are connected via a pressure-bearing pipe, and the transducer acquisition unit (4) and the standard hydrophone (8) are connected via cables; The thermal insulation and sound-transmitting sealed cavity (5) is provided with a transmitting transducer (6) to be tested and is filled with the high-temperature resistant liquid (7). The thermal insulation and sound-transmitting sealed 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 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 a sound signal. The transducer acquisition unit (4) is used to acquire the sound signal received by the standard hydrophone (8). The sound signal acquired by the transducer acquisition unit (4) is used to judge the high-temperature resistance performance of the transmitting transducer (6).

2. The device according to claim 1, wherein: The material of the heat-insulating and sound-transmitting sealed cavity (5) is a heat-insulating and sound-transmitting material, and the high-temperature resistant liquid (7) is silicone oil.

3. The device according to claim 2, wherein the heat-insulating and sound-transmitting sealed cavity (5) comprises: An upper end cover (14), a cavity wall (19), a lower end cover (20), a transducer frame (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 frame (12) is fixed to the upper end cover (14) via a connecting rod (13), and the transmitting transducer (6) is mounted on the transducer frame (12); The heating resistor (15) is mounted on the upper end cover (14), and 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 mounted on the upper end cover (14), and the high temperature resistant oil pump (16) is connected to the metal pipe (17). 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-insulating and sound-transmitting sealing cavity (5) circulates; The temperature sensor (18) is mounted on the transducer frame (12), and the temperature sensor (18) is connected to a temperature controller for monitoring the temperature inside the heat-insulating and sound-transmitting sealed cavity (5).

4. The heat-insulating and sound-permeable sealed cavity according to claim 3, wherein: The number of the heating resistors (15) is 4 and 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 polyetheretherketone, the thickness of the cavity wall (19) is 10 mm, and the inner diameter of the thermal insulation and sound-transmitting sealing cavity is 120 mm and the height is 560 mm.

5. The device according to claim 1, wherein: Used to judge the high temperature resistance performance of the transducer, including: Determine, based on the acoustic signal collected by the transducer collection unit (4), a first energy value of a first waveform corresponding to the acoustic signal and a first amplitude value of the first waveform within a preset first temperature range, determine a second energy value of a second waveform corresponding to the acoustic signal and a second amplitude value of the second waveform within a preset second temperature range, and determine, based on the first energy value, the second energy value, the first radiation value, the second radiation value and a preset calculated transducer high temperature resistance index, a first indicator indicating the high temperature resistance performance of the transducer; The high temperature resistance index calculation formula is: Among them, E1 represents the first energy value of the first waveform corresponding to the sound signal within a preset first temperature range, E represents the second energy value of the second waveform corresponding to the sound signal within a 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.

6. 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 collection unit (4), a heat-insulating sound-transmitting sealed cavity (5), a standard hydrophone (8), and a standard sound source (11); The electric heating constant temperature control unit (1), the transducer collection unit (4) and the heat-insulating sound-transmitting sealed cavity (5) are connected via cables, the negative pressure constant control unit (2) and the heat-insulating sound-transmitting sealed cavity (5) are connected via a pressure-bearing pipe, the transducer collection unit (4) and the standard hydrophone (8) are connected via cables, and the transducer excitation unit (3) and the standard sound source (11) are connected via cables; The heat-insulating sound-transmitting sealed cavity (5) is provided with a receiving transducer (10) to be tested and is 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 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 bubbles in the high-temperature resistant liquid (7) to keep the pressure constant. The transducer excitation unit (3) is used to excite the standard sound source (11) to emit a sound signal. The transducer acquisition unit (4) is used to acquire the sound signals received by the standard hydrophone (8) and the receiving transducer (10). The sound signals acquired by the transducer acquisition unit (4) are used to judge the high-temperature resistance performance of the receiving transducer (10).

7. The device according to claim 1, wherein: The material of the heat-insulating and sound-transmitting sealed cavity (5) is a heat-insulating and sound-transmitting material, and the high-temperature resistant liquid (7) is silicone oil.

8. The device according to claim 7, wherein the heat-insulating and sound-transmitting sealed cavity (5) comprises: An upper end cover (14), a cavity wall (19), a lower end cover (20), a transducer frame (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 frame (12) is fixed to the upper end cover (14) via a connecting rod (13), and the receiving transducer (10) is mounted on the transducer frame (12); The heating resistor (15) is mounted on the upper end cover (14), and 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 mounted on the upper end cover (14), and the high temperature resistant oil pump (16) is connected to the metal pipe (17). 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-insulating and sound-transmitting sealing cavity (5) circulates; The temperature sensor (18) is mounted on the transducer frame (12), and the temperature sensor (18) is connected to a temperature controller for monitoring the temperature inside the heat-insulating and sound-transmitting sealed cavity (5).

9. The heat-insulating and sound-permeable sealed cavity according to claim 8, wherein: The number of the heating resistors (15) is 4 and 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 polyetheretherketone, the thickness of the cavity wall (19) is 10 mm, and the inner diameter of the thermal insulation and sound-transmitting sealed cavity (5) is 120 mm and the height is 560 mm.

10. The device according to claim 6, wherein: Used to judge the high temperature resistance performance of the transducer, including: Determine, based on the acoustic signal collected by the transducer collection unit (4), a first energy value of a first waveform corresponding to the acoustic signal and a first amplitude value of the first waveform within a preset first temperature range, determine a second energy value of a second waveform corresponding to the acoustic signal and a second amplitude value of the second waveform within a preset second temperature range, and determine, based on the first energy value, the second energy value, the first radiation value, the second radiation value and a preset calculated transducer high temperature resistance index, a first indicator indicating the high temperature resistance performance of the transducer; The high temperature resistance index calculation formula is: Among them, E1 represents the first energy value of the first waveform corresponding to the sound signal within a preset first temperature range, E represents the second energy value of the second waveform corresponding to the sound signal within a 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.

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