Coiled tubing pulling-out indicating device

Abstract

The invention relates to the field of underground operation engineering, in particular to a coiled tubing pulling-out indicating device. Comprising a base, a sensor array belt, an excitation and data acquisition module and an early warning module, and the base is provided with a hollow channel; the sensor array belt is arranged on the periphery of the base, a plurality of mounting holes are formed in the sensor array belt, a sensor is arranged in each mounting hole, and a micro magnet is arranged on each sensor; the excitation and data acquisition module is connected with the sensor array belt; the early warning module is connected with the excitation and data acquisition module. The problems that whether continuous pipe operation equipment completely goes out of a wellhead or not cannot be accurately judged due to the depth error of the continuous pipe operation equipment during operation, the occurrence of valve or tool damage accidents caused by valve closing trial judgment is avoided, and the labor intensity of field operators and the well control risk in the operation process are reduced are solved.

Description

Technical Field

[0001] The invention relates to the field of underground operation engineering, in particular to a continuous pipe pulling out indicating device. Background Art

[0002] During coiled tubing operation, when the coiled tubing is pulled out of the wellhead, it is impossible to determine whether the bottom of the instrument has completely entered above the valve of the gas (oil) tree. The operator relies on experience and the coiled tubing depth reading to continuously try to close the valve. When the valve can be completely closed, it means that the instrument and the coiled tubing have completely entered the blowout preventer. Otherwise, it is necessary to continuously try to close the valve to determine whether the instrument has completely entered the blowout preventer, which often leads to damage to the valve and pinching off of the instrument.

[0003] To solve this problem, the current mainstream detection methods are: mechanical method, electromagnetic method and manual observation. Among them, the mechanical method mainly refers to installing a spring device in the blowout preventer. When the downhole tester is lifted, it hits the spring device and triggers the alarm device to achieve the purpose of detection; the electromagnetic method is mainly based on Ferrari's electromagnetic law. A section of titanium steel pipe is installed in the blowout preventer, and a coil is wound on the pipe string to make it a sensor probe. When the tester passes through the sensor probe at this end, an induced electromotive force is generated in the sensor coil, which triggers the alarm device after processing to achieve the purpose of detection; manual observation mainly focuses on the depth position of the instrument. When the estimated instrument position is about to be reached, the speed is reduced, and the instrument position is manually checked to avoid the occurrence of instrument detachment, collision, etc.

[0004] The fatal flaw of mechanical testing instruments is the service life and failure of the spring. In particular, the spring is often broken, deformed, and failed during the use of coiled tubing. The maintenance is cumbersome and the cycle is long. Different specifications of the blowout preventer need to be customized. The disadvantage of the electromagnetic method is that different specifications of the blowout preventer need to be specially customized, the coil is exposed to aging and wear for a long time, the detection survival rate is low, and the cost performance is low. Summary of the invention

[0005] The object of the present invention is to provide a coiled tubing pulling out indicating device to solve the problem that the coiled tubing operation equipment cannot accurately judge whether the coiled tubing is completely out of the wellhead due to its own depth error.

[0006] A coiled tubing pull-out indication device comprises a base, a sensor array belt, an excitation and data acquisition module and an early warning module, wherein the base is provided with a hollow channel; the sensor array belt is arranged at the outer periphery of the base, a plurality of mounting holes are opened on the sensor array belt, each mounting hole is provided with a sensor, and each sensor is provided with a micro magnet; the sensor array belt is used to detect the magnetic field change generated when a device or instrument with a built-in permanent magnet passes through the hollow channel, and convert it into an electrical signal; the excitation and data acquisition module is connected to the sensor array belt, and is used to give the sensor array belt a time-sharing excitation, perform preprocessing and time-sharing data acquisition on the signals collected by the sensor array belt, perform timing control and communicate with a host computer; the early warning module is connected to the excitation and data acquisition module, and is used to compare the data of the data acquisition module with a preset threshold value, and if the preset requirement is met, control the alarm device to emit an audible and visual alarm to indicate the situation of coiled tubing pull-out.

[0007] Optionally, the sensor array belt includes an N-type sensor array and an S-type sensor array, and the N-type sensor array and the S-type sensor array are alternately distributed on the array sensor base belt, and the micromagnets on the N-type sensor array and the S-type sensor array are respectively NN-type or SS-type and are relatively spaced apart.

[0008] Optionally, the sensor array belt is fixed to the base via an adjustable buckle.

[0009] Optionally, the early warning module adopts diagonal combination judgment. When the diagonal sensors in the sensor array belt detect magnetic field changes at the same time, it is judged that a device or instrument has passed, so as to reduce the false alarm rate.

[0010] Optionally, the early warning module has two setting modes: manual threshold and software threshold. The manual threshold is adjusted by a knob, and the software threshold is set by a host computer, so as to increase the application range of the tester.

[0011] Optionally, the alarm device includes a sound alarm and a light alarm.

[0012] Optionally, a protrusion is further provided at the bottom of the base, and the protrusion is used to form a gap with the inner wall of the blowout prevention device to reduce the shielding effect of the magnetic field.

[0013] Optionally, the excitation and data acquisition module and the early warning module are integrated in a control box, and the control box is provided with a panel, and the panel is provided with a power switch, a power indicator light, a threshold knob, and an alarm indicator light.

[0014] Optionally, the micro-magnet on the sensor is cylindrical, and an adjusting screw is further provided above the micro-magnet for adjusting the distance between the micro-magnet and the sensor to change the sensitivity of the sensor.

[0015] Optionally, the sensor is a piezoresistive thin-film pressure sensor.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. For the coiled tubing pulling-out indicating device of the present application, by arranging a sensor array strip on the base and using the combination of the sensor and the micro-magnet, non-contact detection of a device or instrument with a built-in permanent magnet is achieved, avoiding problems such as spring failure in the mechanical method and coil aging in the electromagnetic method, and improving the accuracy and reliability of detection.

[0018] 2. For the coiled tubing pulling-out indicating device of the present application, through the collaborative work of the excitation and data acquisition module and the warning module, functions such as time-sharing excitation, preprocessing, acquisition, comparison, and alarm of the detection signal are achieved, enhancing the sensitivity and efficiency of detection. At the same time, by integrating the excitation and data acquisition module and the warning module in a control box, the integration and optimization of the detection system are realized, reducing external connecting wires and interfaces, and improving the stability and reliability of the detection system. In addition, by setting the panel of the control box, intuitive and convenient operation and control of the detection system are achieved, increasing the usability and practicality of the detection system.

[0019] 3. For the coiled tubing pulling-out indicating device of the present application, by setting sound alarm and light alarm, multi-dimensional prompts for the detection results are realized, facilitating the observation and judgment of the operator and improving the detection effect and safety.

[0020] 4. For the coiled tubing pulling-out indicating device of the present application, by arranging the micro-magnets on the N-type sensor array and the S-type sensor array in an N-N type or S-S type relative interval, the detection sensitivity of the sensor array strip is improved, and the stability and reliability of the detection system are enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a coiled tubing pulling-out indicating device of the present invention.

[0022] Figure 2 It is a schematic diagram of the structure of the sensor array strip of an embodiment of a coiled tubing pulling-out indicating device of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the base of an embodiment of a coiled tubing pulling-out indicating device of the present invention.

[0024] Figure 4Schematic diagram of the sensor unit structure of an embodiment of a coiled tubing pulling-out indicating device according to the present invention.

[0025] Figure 5 Schematic diagram of the electrical functions of the control box of an embodiment of a coiled tubing pulling-out indicating device according to the present invention.

[0026] Wherein, 1 - base, 11 - hollow channel, 2 - sensor array tape, 21 - sensor array base tape, 22 - N-type sensor array, 23 - S-type sensor array, 24 - buckle, 25 - buckle lock, 26 - wire groove, 3 - excitation and data acquisition module, 4 - early warning module, 5 - adjusting screw, 61 - first micro-magnet (61), 62 - second micro-magnet (62), 7 - sensor, 8 - sensor base. Specific implementation mode

[0027] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0028] The following detailed descriptions are all exemplary descriptions, aiming to provide further detailed descriptions of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs. The terms used in the present invention are only for the purpose of describing specific implementation modes, and are not intended to limit the exemplary implementation modes according to the present invention.

[0029] As Figures 1 - 3 shown, the purpose of the present invention is to provide a coiled tubing pulling-out indicating device for detecting whether all instruments enter the blowout preventer during coiled tubing operations or logging, so as to avoid damaging the valve or pinching off the instrument. The technical solution of an embodiment of the present invention is as follows: A coiled tubing pulling-out indicating device includes a base 1, a sensor array tape 2, an excitation and data acquisition module 3, and an early warning module 4. The base 1 is provided with a hollow channel 11; the sensor array tape 2 is arranged on the outer periphery of the base 1. A plurality of mounting holes are provided on the sensor array tape 2, and each mounting hole is provided with a sensor 7, and each sensor 7 is provided with a micro-magnet; the sensor array tape 2 is used to detect the magnetic field change generated when a device or instrument with a built-in permanent magnet passes through the hollow channel 11 and convert it into an electrical signal; the excitation and data acquisition module 3 is connected to the sensor array tape 2 for time-sharing excitation of the sensor array tape 2, preprocessing the signals collected by the sensor array tape 2, time-sharing data acquisition, timing control, and communication with the upper computer; the early warning module 4 is connected to the excitation and data acquisition module 3 for comparing the data of the data acquisition module with a preset threshold. If the preset requirements are met, it controls the alarm device to emit an audible and visual alarm to indicate the situation of coiled tubing pulling out.

[0030] Specifically, all components of the present invention adopt explosion-proof design.

[0031] Specifically, the base 1 is a titanium alloy base, and the titanium alloy base is connected to the blowout preventer to provide an open magnetic field environment and prevent the magnetic field from being shielded. Specifically, a sensor 7 is provided at the bottom inside the mounting hole, a micro-magnet is provided on top of the sensor 7, and the mounting hole on top of the micro-magnet is closed. During use, the direction of the micro-magnet faces the inner ring, and the direction of the sensor 7 faces the outer ring. For the coiled tubing pulling-out indicating device of the present invention, by providing a sensor array strip 2 on the base 1 and using the combination of the sensor 7 and the micro-magnet, non-contact detection of devices or instruments with built-in permanent magnets is achieved, avoiding problems such as spring failure in the mechanical method and coil aging in the electromagnetic method, and improving the accuracy and reliability of detection. At the same time, through the collaborative work of the excitation and data acquisition module 3 and the warning module 4, functions such as time-sharing excitation, preprocessing, acquisition, comparison, and alarm of the detection signal are realized, enhancing the sensitivity and efficiency of detection. In addition, the coiled tubing pulling-out indicating device of the present invention has a simple structure and is easy to install, is applicable to blowout preventers of different specifications, and has a wide application prospect.

[0032] Such as Figure 4 shown, as a specific example, the sensor array strip 2 includes an N-type sensor array 22 and an S-type sensor array 23. The N-type sensor array 22 and the S-type sensor array 23 are alternately distributed on the sensor array baseband 21, and the micro-magnets on the N-type sensor array 22 and the S-type sensor array 23 are respectively arranged at intervals in an N-N type or S-S type.

[0033] Specifically, it further includes a sensor array baseband 21. The sensor array baseband 21 includes a plurality of mounting holes. A sensor 7 is provided at the bottom inside the mounting hole. A first micro-magnet 61 is provided on the sensor 7, and a second micro-magnet 62 is provided above the first micro-magnet 61. The first micro-magnet 61 and the second micro-magnet 62 have the same poles facing each other and are spaced apart by a certain distance. The upper part of the second micro-magnet 62 is closed. For the coiled tubing pulling-out indicating device of the present invention, by providing an N-type sensor array 22 and an S-type sensor array 23, detection of permanent magnets with different polarities is achieved, increasing the flexibility and adaptability of detection. At the same time, by arranging the micro-magnets at intervals in an N-N type or S-S type respectively, enhancement of the detection signal and anti-interference are realized, improving the stability and accuracy of detection.

[0034] As a preferred example, the sensor array strip 2 is fixed to the base 1 through an adjustable buckle.

[0035] Specifically, the adjustable buckle includes a plurality of buckles 24 and a buckle lock 25. The buckles 24 are arranged on the sensor array belt 2 at a certain distance, and a buckle lock 25 is arranged at one end of the sensor array belt 2 for locking the buckles 24. The coiled tubing retrieval indicating device of the present invention realizes the fixation and adjustment of the sensor array belt 2 by setting the adjustable buckle, facilitates the installation and disassembly of the sensor array belt 2, adapts to bases 1 with different diameters, and increases the service life and repeatability of the sensor array belt 2.

[0036] Specifically, the sensor array belt 2 may further include a wire groove 26, which is a centralized placement location for the lines of the sensors 7.

[0037] As a preferred example, the warning module 4 uses diagonal combination judgment. When the diagonal sensors 7 in the sensor array belt 2 simultaneously detect a magnetic field change, it is judged that a device or instrument has passed through, which is used to reduce the false alarm rate.

[0038] The coiled tubing retrieval indicating device of the present invention realizes the screening and judgment of detection signals by using diagonal combination judgment. An alarm is only issued when the signal generated by the diagonal combination reaches the set threshold, avoiding false alarms caused by magnetic field changes due to other factors, and improving the reliability and accuracy of detection.

[0039] As a specific example, the warning module 4 has two setting methods: manual threshold and software threshold. The manual threshold is adjusted by a knob, and the software threshold is set by a host computer, which is used to increase the application range of the tester.

[0040] The coiled tubing retrieval indicating device of the present invention realizes the flexible control of detection signals by setting two setting methods of manual threshold and software threshold, meets the detection requirements in different occasions and conditions, and increases the application range and adaptability of the tester.

[0041] As a specific example, the alarm device includes a sound alarm and a light alarm.

[0042] The coiled tubing retrieval indicating device of the present invention realizes multi-dimensional prompting of detection results by setting a sound alarm and a light alarm, facilitates the observation and judgment of operators, and improves the detection effect and safety.

[0043] As a preferred example, a sensor base 8 is provided at the bottom of each sensor 7 for providing a flat environment for the sensor 7.

[0044] As a preferred example, a protrusion is further provided at the bottom of the base 1. The protrusion is used to form a gap with the inner wall of the blowout preventer to reduce the magnetic field shielding effect.

[0045] The coiled tubing pulling-out indicating device of the present invention realizes the isolation between the base 1 and the blowout preventer by setting the protruding part of the base 1, reduces the magnetic field shielding effect of the blowout preventer, and improves the sensitivity and accuracy of detection.

[0046] As a preferred example, the excitation and data acquisition module 3 and the warning module 4 are integrated in a control box. The control box is provided with a panel, and the panel is provided with a power switch, a power indicator light, a threshold knob, and an alarm indicator light.

[0047] The coiled tubing pulling-out indicating device of the present invention realizes the integration and optimization of the detection system by integrating the excitation and data acquisition module 3 and the warning module 4 in a control box, reduces the external connection wires and interfaces, and improves the stability and reliability of the detection system. At the same time, by setting the panel of the control box, the intuitive and convenient operation and control of the detection system are realized, and the usability and practicality of the detection system are increased.

[0048] As a preferred example, the micro-magnet on the sensor 7 is cylindrical, and an adjusting screw 5 is further arranged above the micro-magnet for adjusting the distance between the micro-magnet and the sensor 7 to change the sensitivity of the sensor 7.

[0049] The coiled tubing pulling-out indicating device of the present invention realizes the adjustment of the sensitivity of the sensor 7 by setting the cylindrical micro-magnet and the adjusting screw 5, meets the detection requirements under different magnetic field intensities, and increases the adaptability and flexibility of the sensor 7.

[0050] As a preferred example, the sensor 7 is a piezoresistive thin-film pressure sensor.

[0051] The coiled tubing pulling-out indicating device of the present invention realizes the detection of characteristics such as high sensitivity, wide linear range, low temperature drift, low power consumption, small volume, and light mass for magnetic field changes by adopting a piezoresistive thin-film pressure sensor, and improves the performance and effect of detection.

[0052] As Figure 5 As shown, inside the control box, the transmitting probe serves as an input source, and each transmitting probe has its own parameters and status and needs to be detected and controlled.

[0053] "Sensor time-division excitation" means that by performing time-division excitation on the sensor 7, the sensor 7 can perform detections in a certain order and time interval, avoiding interference between sensors 7 and signal chaos, and improving the detection efficiency and accuracy.

[0054] "Data acquisition" means that by performing data acquisition on the signals of the sensor 7, the signals can be stored and transmitted in a certain format and rule, facilitating the analysis and processing of data.

[0055] "Signal preprocessing" means that by performing signal preprocessing on the signals collected by data acquisition, the signals can remove noise and clutter, enhancing the quality and credibility of the signals.

[0056] "Timing control" means that by performing timing control on the power supply module, the power supply module can adjust the voltage or current according to a certain frequency and intensity to control the frequency and intensity of the alarm device.

[0057] "Host computer communication" means that through communication with external devices or systems, data interaction and instruction reception are realized, increasing the intelligence and automation of the detection system.

[0058] "Early warning control" means that by performing early warning control on the results of signal preprocessing, the detection system can perform detections according to different detection conditions and requirements, avoiding false alarms or missed alarms caused by too high or too low thresholds, and improving the credibility and accuracy of detections.

[0059] "Alarm" means that the early warning module 4 emits an audible and visual alarm by receiving the control signal of the early warning control, indicating the situation of coiled tubing pulling out, and reminding the operator to pay attention.

[0060] "Power supply module" means that the power supply module provides power for each component and is connected to the external power supply interface through the power supply interface to ensure the normal operation of the detection system.

[0061] The implementation or usage method of the coiled tubing pulling out indicating device of the present invention is as follows:

[0062] First, install the coiled tubing pulling out indicating device of the present invention at the upper end of the blowout preventer, align the hollow channel 11 of the base 1 with the hollow channel of the blowout preventer, surround the sensor array strip 2 around the outer periphery of the base 1, fix the control box on the outside of the blowout preventer, and place the alarm device at a position visible to the operator.

[0063] Second, turn on the power switch of the control box and observe whether the power indicator light is on. If it is on, it means that the detection system is working normally; if it is not on, it means that the detection system has a fault and needs to be checked and repaired.

[0064] Then, according to needs, set the threshold of the detection signal through the knob or the host computer, so that the detection system can perform detections according to different detection conditions and requirements.

[0065] Next, coiled tubing operations or logging are carried out. When a device or instrument with an internal permanent magnet passes through the blowout preventer, the sensor array strip 2 will detect the change in the magnetic field, convert it into an electrical signal, and transmit it to the excitation and data acquisition module 3. The excitation and data acquisition module 3 will perform time-division excitation, preprocessing, acquisition, timing control, and communication with the host computer on the signal, and transmit the signal to the early warning module 4. The early warning module 4 will perform diagonal combination judgment and threshold comparison on the signal. If it is determined that a device or instrument has passed and meets the preset requirements, it will control the alarm device to emit an audible and visual alarm, indicating the situation of the coiled tubing being pulled out, and reminding the operator to pay attention.

[0066] Finally, according to the prompt of the alarm device, the operator can take corresponding measures in time to avoid damaging the valve or pinching off the instrument, ensuring the safe and smooth progress of coiled tubing operations or logging.

[0067] As is known by common technical knowledge, the present invention can be implemented by other embodiments that do not depart from its spiritual essence or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and are not the only ones. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims

1. A coiled tubing pulling-out indicating device, characterized in that, include: A base (1), wherein the base (1) is provided with a hollow channel (11); A sensor array belt (2), the sensor array belt (2) being arranged on the periphery of the base (1), the sensor array belt (2) being provided with a plurality of mounting holes, each of the mounting holes being provided with a sensor (7), and each of the sensors (7) being provided with a micro magnet; the sensor array belt (2) being used to detect changes in the magnetic field generated when a device or instrument with a built-in permanent magnet passes through the hollow channel (11), and converting the changes into electrical signals; An excitation and data acquisition module (3) is connected to the sensor array belt (2) and is used to excite the sensor array belt (2) in a time-sharing manner, pre-process the signals collected by the sensor array belt (2) and collect data in a time-sharing manner, and perform timing control and host computer communication; The early warning module (4) is connected to the excitation and data acquisition module (3) and is used to compare the data of the data acquisition module with a preset threshold value. If the preset requirement is met, the alarm device is controlled to emit an audible and visual alarm to indicate the situation of the coiled tubing being pulled out.

2. The coiled tubing pulling-out indicating device according to claim 1, wherein, The sensor array belt (2) comprises an N-type sensor array (22) and an S-type sensor array (23), wherein the N-type sensor array (22) and the S-type sensor array (23) are alternately distributed on the sensor array base belt (21), and the micro magnets on the N-type sensor array (22) and the S-type sensor array (23) are arranged in a relative spacing of NN type or SS type respectively.

3. The coiled tubing pulling-out indicating device according to claim 2, characterized in that, The sensor array belt (2) is fixed to the base (1) via an adjustable buckle.

4. The coiled tubing pulling-out indicating device according to claim 1, wherein The early warning module (4) adopts diagonal combination judgment. When the diagonal sensors (7) in the sensor array belt (2) simultaneously detect changes in the magnetic field, it is judged that a device or instrument has passed, thereby reducing the false alarm rate.

5. The coiled tubing pulling-out indicating device according to claim 1, wherein, The early warning module (4) is provided with two setting modes: a manual threshold and a software threshold. The manual threshold is adjusted by a knob, and the software threshold is set by a host computer, so as to increase the application range of the tester.

6. The coiled tubing pulling-out indicating device according to claim 1, characterized in that, A sensor base (8) is provided at the bottom of each sensor (7) for providing a flat environment for the sensor (7).

7. The coiled tubing pulling-out indicating device according to claim 1, wherein The bottom of the base (1) is also provided with a protrusion, and the protrusion is used to form a gap with the inner wall of the blowout prevention device to reduce the shielding effect of the magnetic field.

8. The coiled tubing pulling-out indicating device according to claim 1, wherein, The excitation and data acquisition module (3) and the early warning module (4) are integrated in a control box, and the control box is provided with a panel, and the panel is provided with a power switch, a power indicator light, a threshold knob, and an alarm indicator light.

9. The coiled tubing pulling-out indicating device according to claim 2, wherein, The micro-magnet on the sensor (7) is cylindrical, and an adjustment screw (5) is provided above the micro-magnet for adjusting the distance between the micro-magnet and the sensor (7) to change the sensitivity of the sensor (7).

10. The coiled tubing pulling-out indicating device according to claim 1, wherein The sensor (7) is a piezoresistive thin film pressure sensor (7).

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