A logging probe anti-sticking and retrieval system and method based on negative Poisson's ratio materials

Abstract

This invention discloses a logging probe anti-sticking and retrieval system and method based on negative Poisson's ratio materials. Unlike typical positive Poisson's ratio materials, the outstanding mechanical property of negative Poisson's ratio materials is that when subjected to compressive load in a certain direction, they do not exhibit compressive characteristics in the vertical direction, but rather compressive characteristics. Therefore, when subjected to compressive loads, the negative Poisson's ratio material structure can exhibit overall volume reduction, without compressing adjacent mechanical equipment or geological structures, making it particularly suitable for downhole anti-sticking technology. Simultaneously, by combining a piezoelectric ultrasonic transducer and utilizing the nonlinear acoustic elasticity effect of solid media, the propagation characteristics of ultrasonic waves inside the negative Poisson's ratio material probe subjected to compressive loads will change accordingly. This allows for the assessment of the magnitude of the environmental compressive load and the degree of sticking risk, facilitating quantitative analysis by the control system and enabling retrieval action decisions. Combined with the anti-sticking control system and anti-sticking retrieval device, the logging instrument can be retrieved.

Description

Technical Field

[0001] This invention belongs to the field of ultrasonic stress monitoring and intelligent structure in the field of engineering structure health monitoring and management, and relates to a well logging probe anti-sticking and recovery system and method based on negative Poisson's ratio material. Background Technology

[0002] Currently, in the field of well logging instrument structural health monitoring and management technology, existing technologies for preventing and recovering stuck well logging instruments during downhole operations are limited by the influence of casing and downhole geological environment, and there are few effective anti-sticking and recovery technologies. Once a downhole instrument becomes stuck, violent retrieval methods are often used, which damage the well logging instrument and casing equipment, seriously affecting the service performance of the well logging instrument and the logging efficiency. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that existing recovery technologies are limited by the casing and downhole geological environment, and cannot effectively prevent jamming and recover the probes. This invention provides a logging probe anti-jamming recovery system and method based on negative Poisson's ratio materials.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] This invention proposes a logging probe anti-sticking and retrieval system based on negative Poisson's ratio materials, comprising a probe installed on a logging instrument and an anti-sticking and retrieval device; the probe is located at the front end of the logging instrument, a piezoelectric ultrasonic transducer is connected to the probe, the other end of the piezoelectric ultrasonic transducer is connected to an anti-sticking control system, one end of the anti-sticking and retrieval device is connected to the piezoelectric ultrasonic transducer, and the other end of the anti-sticking and retrieval device is connected to the probe.

[0006] Preferably, the piezoelectric ultrasonic transducer includes a step signal generator, a stress detection device, and an interface device;

[0007] The step signal generator is connected to the first port of the stress detection device, and the second port of the stress detection device is connected to the interface device;

[0008] The third port of the stress detection device is connected to the probe, and the fourth port of the stress detection device is connected to the anti-jamming control system.

[0009] Preferably, a power amplifier circuit is connected between the step signal generator and the stress detection device.

[0010] Preferably, the stress detection device is a piezoelectric transducer.

[0011] Preferably, the probe is made of a material with a negative Poisson's ratio.

[0012] Preferably, a sleeve is provided on the outside of the logging probe anti-sticking and recovery system.

[0013] This invention proposes a method for preventing and recovering stuck logging probes based on negative Poisson's ratio materials, comprising the following steps:

[0014] The probe is excited by an ultrasonic transducer using a piezoelectric ultrasonic transducer, and the signal is transmitted back to the anti-jamming control system.

[0015] The anti-jamming control system obtains the stress state inside the probe based on the propagation characteristics and waveform conversion characteristics of ultrasonic waves within the probe;

[0016] If the stress state and the health baseline state are consistent, the probe is determined to be in normal working condition, and the anti-sticking control system controls the logging instrument to conduct normal forward exploration operations.

[0017] If the stress state is abnormal, it is determined that the stress state is abnormal, and the anti-sticking control system controls the anti-sticking recovery device to recover the logging instrument.

[0018] Preferably, when the anti-jamming control system cannot determine that the stress state is abnormal, it controls the anti-jamming recovery device to retrieve the logging instrument and move it backward. Based on the stress state change, it compares and analyzes the stress state of the current position and the previous position, and controls the anti-jamming recovery device to retrieve the logging instrument, so as to realize the logging instrument's prediction of the front-end environment and its escape and retrieval.

[0019] Preferably, the piezoelectric ultrasonic transducer transmits digital signals back to the anti-jamming control system through the piezoelectric inverse effect and digital-to-analog conversion circuit.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This invention proposes a logging probe anti-sticking and retrieval system based on negative Poisson's ratio materials. Unlike typical positive Poisson's ratio materials, the outstanding mechanical property of negative Poisson's ratio materials is that when subjected to compressive loads in a certain direction, they do not exhibit compressive characteristics in the vertical direction, but rather compressive characteristics. Therefore, negative Poisson's ratio material structures can exhibit overall volume reduction under compressive loads, without compressing adjacent mechanical equipment or geological structures, making them particularly suitable for downhole anti-sticking technology. Simultaneously, by combining a piezoelectric ultrasonic transducer and utilizing the nonlinear acoustic elasticity effect of solid media, the propagation characteristics of ultrasonic waves inside the negative Poisson's ratio material probe under compressive loads will change accordingly. This allows for the assessment of the magnitude of the environmental compressive load and the degree of sticking risk, facilitating quantitative analysis and retrieval decision-making by the control system. Combined with the anti-sticking control system and anti-sticking retrieval device, the logging instrument can be retrieved. Therefore, this retrieval system can both prevent sticking and quantify environmental loads, facilitating quantitative analysis and judgment, ultimately achieving intelligent anti-sticking and timely retrieval of downhole logging probes, maintaining logging instruments and previous drilling equipment, and possessing significant economic benefits.

[0022] Furthermore, the probe is made of a negative Poisson's ratio material. Due to its negative Poisson's ratio characteristics (compression deformation characteristics, while positive Poisson's ratio materials exhibit compressive expansion deformation characteristics), it will not expand and deform under mechanical pressure loads, thus preventing it from jamming the logging probe connected to it and damaging the equipment.

[0023] Furthermore, the probe is located at the front end of the logging instrument and can withstand mechanical loads (such as mechanical loads caused by jamming inside the casing).

[0024] This invention proposes a method for preventing and recovering stuck logging probes based on negative Poisson's ratio materials. The method involves exciting an ultrasonic excitation signal from the probe using a piezoelectric ultrasonic transducer and transmitting the signal back to the anti-sticking control system. The anti-sticking control system processes the acquired information to obtain the probe's stress state. By combining the anti-sticking control system and the anti-sticking recovery device, the logging instrument can be recovered. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a diagram of the well logging probe anti-sticking and recovery system based on negative Poisson's ratio material of the present invention.

[0027] Figure 2 This is a structural diagram of the piezoelectric ultrasonic transducer of the present invention.

[0028] Figure 3 This is a flowchart of the well logging probe anti-sticking and recovery method based on negative Poisson's ratio material according to the present invention.

[0029] Among them: 1-probe, 2-piezoelectric ultrasonic transducer, 21-step signal generator, 22-power amplifier circuit, 23-stress detection equipment, 24-interface equipment, 3-anti-jamming control system, 4-anti-jamming recovery device, 5-logging instrument, 6-sleeve. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply 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.

[0035] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0036] The present invention will now be described in further detail with reference to the accompanying drawings:

[0037] This invention proposes a logging probe anti-sticking and retrieval system based on negative Poisson's ratio materials, such as... Figure 1 As shown, probe 1 and anti-jamming recovery device 4 are installed on logging instrument 5. Probe 1 is located at the front end of logging instrument 5, and a piezoelectric ultrasonic transducer 2 is connected to probe 1. The other end of the piezoelectric ultrasonic transducer 2 is connected to the anti-jamming control system 3. One end of the anti-jamming recovery device 4 is connected to the piezoelectric ultrasonic transducer 2, and the other end of the anti-jamming recovery device 4 is connected to probe 1. Probe 1 is made of negative Poisson's ratio material. Due to its negative Poisson's ratio characteristics (compression deformation characteristics, while positive Poisson's ratio materials exhibit compressive expansion deformation characteristics), it will not expand and deform under mechanical pressure loads, causing jamming of the logging probe connected to it and damaging the equipment. The probe is located at the front end of the logging instrument and can withstand mechanical loads (such as jamming mechanical loads inside the casing). The logging probe anti-sticking and retrieval system proposed in this invention differs from that of general positive Poisson's ratio materials. The prominent mechanical property of negative Poisson's ratio materials is that when the structure is subjected to compressive load in a certain direction, it does not exhibit compressive characteristics in the vertical direction, but rather compressive characteristics. Therefore, when subjected to compressive load, the structure of a negative Poisson's ratio material can exhibit overall volume reduction, without compressing adjacent mechanical equipment or geological structures, making it particularly suitable for downhole anti-sticking technology. Simultaneously, combined with a piezoelectric ultrasonic transducer 2, utilizing the nonlinear acoustic elasticity effect of solid media, the propagation characteristics of ultrasonic waves inside the negative Poisson's ratio material probe 1 under compressive load will change accordingly. This allows for the assessment of the magnitude of the environmental compressive load and the degree of sticking risk, facilitating quantitative analysis by the control system and enabling retrieval action decisions. Combined with the anti-sticking control system and anti-sticking retrieval device, the logging instrument can be retrieved.

[0038] like Figure 2As shown, the piezoelectric ultrasonic transducer 2 includes a step signal generator 21, a stress detection device 23, and an interface device 24. The step signal generator 21 is connected to the first port of the stress detection device 23, the second port of the stress detection device 23 is connected to the interface device 24, the third port of the stress detection device 23 is connected to the probe 1, and the fourth port of the stress detection device 23 is connected to the anti-jamming control system 3. A power amplifier circuit 22 is connected between the step signal generator 21 and the stress detection device 23. The stress detection device 23 is a piezoelectric transducer crystal. The anti-jamming recovery device 4 is installed below the logging instrument 5, and a sleeve 6 is provided outside the logging probe anti-jamming recovery system.

[0039] The function and working process of the components are as follows:

[0040] The negative Poisson's ratio material probe 1 is located at the front end of the logging instrument 5 and is used to detect the environmental load in the working front area of ​​the logging instrument 5. The negative Poisson's ratio material probe 1 can withstand mechanical loads (such as the mechanical load of jamming inside the casing). At the same time, due to its negative Poisson's ratio characteristics (compression deformation characteristics, while positive Poisson's ratio materials exhibit compressive expansion deformation characteristics), when subjected to environmental compressive loads that may cause the logging instrument to get stuck, it will undergo volume reduction deformation, which can avoid jamming and damage to the logging instrument 5 at the rear end of the negative Poisson's ratio material probe 1.

[0041] A piezoelectric ultrasonic transducer 2 is connected to a negative Poisson's ratio material probe 1. It excites an ultrasonic signal through the piezoelectric effect and receives the ultrasonic echo signal to evaluate the stress state of the negative Poisson's ratio material probe 1. The piezoelectric ultrasonic transducer 2 includes a step signal generator 21, a power amplifier circuit 22, a stress detection device 23, and an interface device 24. The step signal generator 21 excites a specific power voltage signal through the power amplifier circuit 22, which in turn excites a specific mode and transit acoustic wave signal from the stress detection device 23 to detect the negative Poisson's ratio material probe 1. The piezoelectric ultrasonic transducer 2 is characterized by its use of ultrasonic stress detection methods (such as ultrasonic longitudinal wave, transverse wave, or longitudinal-transverse wave methods) to utilize the acoustoelastic effect in the solid medium. The stress detection device 23 detects the stress state of the negative Poisson's ratio material and transmits the signal back to the anti-jamming control system 3.

[0042] The anti-jamming control system 3 is used to analyze and process the signals returned by the stress detection device 23 of the piezoelectric ultrasonic transducer 2, evaluate the stress state of the negative Poisson's ratio material probe 1, and make a judgment control signal: if normal, the anti-jamming control system 3 continues the logging instrument's forward operation; if abnormal, the anti-jamming control system 3 controls the logging instrument to stop operation and takes corresponding actions to realize the logging probe retrieval.

[0043] The anti-stuck recovery device 4 can rely on existing logging instrument recovery devices to achieve complete recovery of the logging instrument and the negative Poisson's ratio material probe 1. (The logging instrument front-end component recovery device is used to connect the stress detection device 23 in the piezoelectric ultrasonic transducer 2 at one end and to the probe 1 at the other end.) It can also achieve partial recovery by separating the components according to their importance (in this case, a separation device for each instrument component needs to be set up).

[0044] This invention proposes a method for preventing and recovering stuck logging probes based on negative Poisson's ratio materials, such as... Figure 3 As shown, it includes the following steps:

[0045] Step 1: Use piezoelectric ultrasonic transducer 2 to excite ultrasonic excitation signal from probe 1 and transmit the signal back to anti-jamming control system 3;

[0046] The piezoelectric ultrasonic transducer 2 transmits digital signals back to the anti-jamming control system 3 through the piezoelectric inverse effect and digital-to-analog conversion circuit.

[0047] Step 2: The anti-jamming control system 3 obtains the stress state inside the probe 1 based on the propagation characteristics and waveform conversion characteristics of the ultrasonic wave within the probe 1.

[0048] Step 3: If the stress state and the health baseline state are consistent, it is determined that the working state of probe 1 is normal, and the anti-sticking control system 3 controls the logging instrument 5 to conduct normal forward exploration operations.

[0049] If the stress state is abnormal, it is determined that the stress state is abnormal, and the anti-stuck control system 3 controls the anti-stuck recovery device 4 to recover the logging instrument 5.

[0050] When the anti-jamming control system 3 cannot determine that the stress state is abnormal, it controls the anti-jamming recovery device 4 to recover the logging instrument 5 and move it backward. Based on the stress state change, it compares and analyzes the stress state of the current position and the previous position, and controls the anti-jamming recovery device 4 to recover the logging instrument 5, so as to realize the logging instrument 5's prediction of the front-end environment and its escape and recovery.

[0051] The detailed steps are as follows:

[0052] S1. The anti-jamming control system 3, using its host computer equipment and software, controls the piezoelectric ultrasonic transducer 2 to generate an ultrasonic excitation signal, as detailed below:

[0053] The step signal generator 21 excites a specific power voltage signal through the power amplifier circuit 22, which in turn excites a specific mode and a transit acoustic signal of the stress detection device 23 to transit the solid medium domain of the negative Poisson's ratio material probe 1 and returns an ultrasonic signal. The piezoelectric ultrasonic transducer 2 transmits a digital signal back to the anti-jamming control system 3 through the piezoelectric inverse effect and the digital-to-analog conversion circuit.

[0054] S2, the anti-jamming control system 3 evaluates the stress state within the negative Poisson's ratio material probe 1 based on the propagation characteristics and waveform conversion characteristics of ultrasonic waves within the probe 1, and makes corresponding judgments based on the returned signals;

[0055] S21. The anti-jamming control system 3 obtained the echo signal characteristics of the negative Poisson's ratio material probe 1 under various stress states through prior experiments, and established a corresponding database to facilitate subsequent comparative analysis.

[0056] S22. The anti-jamming control system 3 must obtain the ultrasonic echo signal characteristics of the negative Poisson's ratio material probe 1 under normal working conditions and establish corresponding health benchmarks to facilitate comparative analysis and judgment.

[0057] S3. Based on the judgment of the anti-jamming control system 3 in step S2, the anti-jamming control system 3 makes a judgment (it compares the detected tension information of the instrument with the theoretical tension information of the instrument in real time. If the detected tension information of the instrument is greater than the theoretical tension information of the instrument, it is determined that the instrument is jammed, and the jamming information is sent to the personnel; if the detected tension information of the instrument is less than the theoretical tension information of the instrument, it is determined that the instrument is obstructed, and the obstruction information is sent to the personnel):

[0058] S31. If the stress state and the health baseline state are consistent, it is determined that the working state of the negative Poisson's ratio material probe 1 is normal, and the anti-sticking control system 3 controls the logging instrument 5 to perform normal forward exploration operation.

[0059] S32. If the stress state is abnormal, the anti-stuck control system 3 determines that the stress state is abnormal and controls the anti-stuck recovery device 4 to recover the logging instrument 5.

[0060] S33. If the anti-jamming control system 3 cannot determine that the stress state is abnormal, it controls the anti-jamming recovery device 4 to recover the logging instrument 5 and move it back a short distance. Based on the change in stress state, it compares and analyzes the stress state of the current position and the previous position, makes a judgment, and controls the anti-jamming recovery device 4 to recover the logging instrument 5, so as to realize the logging instrument 5's prediction of the front-end environment and its escape and recovery.

[0061] This invention provides an intelligent anti-sticking and retrieval system for logging probes based on negative Poisson's ratio materials. Unlike typical positive Poisson's ratio materials, the outstanding mechanical property of negative Poisson's ratio materials is that when subjected to compressive loads in a certain direction, they do not exhibit compressive characteristics in the vertical direction, but rather compressive characteristics. Therefore, when subjected to compressive loads, the structure of negative Poisson's ratio materials can exhibit overall volume reduction, without compressing adjacent mechanical equipment or geological structures, making it particularly suitable for downhole anti-sticking technology. Simultaneously, by combining a piezoelectric ultrasonic transducer and utilizing the nonlinear acoustic elasticity effect of solid media, the propagation characteristics of ultrasonic waves inside the negative Poisson's ratio material probe under compressive loads will change accordingly. This allows for the assessment of the magnitude of the environmental compressive load and the degree of sticking risk, facilitating quantitative analysis and retrieval decision-making by the control system. In summary, by combining a probe based on negative Poisson's ratio materials and an ultrasonic stress monitoring method based on acoustic elasticity, sticking can be avoided, and environmental loads can be quantitatively analyzed, facilitating quantitative analysis and judgment. Ultimately, this achieves the goal of intelligent anti-sticking and timely retrieval of downhole logging probes, maintaining expensive logging instruments and previous drilling equipment, resulting in significant economic benefits. Simultaneously, this monitoring system and method can be used to construct digital twins of in-service logging instruments, and can serve as a framework for extending and structuring a structural health monitoring system for the entire logging equipment. It can effectively predict the mechanical service environment of the front-end components of downhole instruments, and utilize the negative Poisson's ratio effect of negative Poisson's ratio probes to avoid jamming accidents caused by compressive loads, enabling timely recovery of expensive logging instruments and reducing production costs. This technology can also be applied to the field of anti-jamming intelligent recovery technology for other downhole operating instruments.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A negative Poisson's ratio material based stuck logging probe recovery system, characterized in that, The probe (1) and the anti-stuck recovery device (4) are installed on the logging instrument (5); the probe (1) is located at the front end of the logging instrument (5), a piezoelectric ultrasonic transducer (2) is connected to the probe (1), the other end of the piezoelectric ultrasonic transducer (2) is connected with an anti-stuck control system (3), one end of the anti-stuck recovery device (4) is connected with the piezoelectric ultrasonic transducer (2), and the other end of the anti-stuck recovery device (4) is connected with the probe (1); the probe (1) is made of a negative Poisson's ratio material.

2. The negative Poisson's ratio material based logging probe stuck prevention and recovery system of claim 1, wherein, The piezoelectric ultrasonic transducer (2) comprises a step signal generator (21), a stress detection device (23) and an interface device (24). The step signal generator (21) is connected with the first port of the stress detection device (23), and the second port of the stress detection device (23) is connected with the interface device (24). The third port of the stress detection device (23) is connected with the probe (1), and the fourth port of the stress detection device (23) is connected with the anti-stuck control system (3).

3. The negative Poisson's ratio material based logging probe stuck prevention and recovery system of claim 2, wherein, A power amplification circuit (22) is connected between the step signal generator (21) and the stress detection device (23).

4. The negative Poisson's ratio material based logging probe anti-stuck recovery system of claim 2, wherein, The stress detection device (23) is a piezoelectric transducer wafer.

5. The negative Poisson's ratio material based logging probe stuck prevention and recovery system of Claim 1, wherein, A sleeve is arranged outside the logging probe anti-stuck recovery system.

6. A stuck drill pipe recovery method based on a negative Poisson's ratio material, characterized by, The method comprises the following steps: The piezoelectric ultrasonic transducer (2) is used to excite an ultrasonic excitation signal of the probe (1), and the return signal is transmitted to the anti-stuck control system (3); The anti-stuck control system (3) obtains the stress state in the probe (1) according to the propagation characteristics and waveform conversion characteristics of the ultrasonic wave in the probe (1); When the stress state is consistent with the health reference state, it is determined that the working state of the probe (1) is normal, and the anti-stuck control system (3) controls the logging instrument (5) to normally forward probe operation; When the stress state is abnormal, it is determined that the stress state is abnormal, and the anti-stuck control system (3) controls the anti-stuck recovery device (4) to recover the logging instrument (5); the probe (1) is made of a negative Poisson's ratio material.

7. The method of claim 6, wherein, When the anti-stuck control system (3) cannot determine that the stress state is abnormal, the anti-stuck recovery device (4) is controlled to recover the logging instrument (5) to move backward, the stress state of the current working position is compared and analyzed according to the stress state variation, the anti-stuck recovery device (4) is controlled to recover the logging instrument (5), and the front-end environment prediction and stuck recovery of the logging instrument (5) are realized.

8. The method of claim 6, wherein, The piezoelectric ultrasonic transducer (2) transmits digital signals to the anti-stuck control system (3) through the piezoelectric inverse effect and a digital-to-analog conversion circuit.

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