Drilling tool internal and external thread array eddy current detection device

Abstract

The utility model discloses an eddy current testing device for an internal and external thread array of a drilling tool. Comprising a probe which is provided with an outer peripheral wall or an inner peripheral wall matched with a drilling tool to be detected; the outer circumferential wall or the inner circumferential wall is provided with a thread structure matched with a to-be-detected thread arranged on the to-be-detected drilling tool. A connector is arranged in the center of the upper end surface of the probe; the high-density array eddy current sensor is arranged in the probe; the signal acquisition module is in signal connection with the high-density array eddy current sensor; the data processing module is electrically connected with the signal acquisition module; and the gear motor is connected with the connector through a connecting assembly and is used for driving the probe to rotate. The device has the beneficial effect that nondestructive testing can be carried out on the internal and external threads of the drilling tool.

Description

Technical Field

[0001] This utility model relates to the field of nondestructive testing technology, and in particular to a drilling tool internal and external thread array eddy current testing device. Background Technology

[0002] Drilling tools are indispensable in oil, gas, and geological exploration. Their threaded sections are critical for connection and load bearing. During operation, drilling tools endure high-intensity mechanical loads and complex environmental conditions. The threaded sections are weak points where stress concentrates, making them prone to defects such as cracks and corrosion. However, existing methods for inspecting drill tool threads mainly rely on conventional magnetic particle testing, which suffers from low efficiency, low accuracy, and a tendency to miss defects. This is especially true for internal threads, where conventional magnetic particle testing is difficult to implement and cannot effectively identify visual defects, thus failing to meet the high efficiency and accuracy requirements of modern oil extraction. Therefore, developing a drill tool internal and external thread inspection technology based on array eddy current technology can achieve efficient and comprehensive inspection and has significant application value. Utility Model Content

[0003] The purpose of this utility model is to provide a drill bit internal and external thread array eddy current detection device, which is equipped with a probe, a high-density array eddy current sensor, a signal acquisition module, a data processing module and a reduction motor, and can perform non-destructive testing on the internal and external threads of the drill bit.

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

[0005] The probe has an outer or inner peripheral wall that is adapted to the drill bit to be tested; the outer or inner peripheral wall has a thread structure adapted to the thread to be tested on the drill bit; and a connector is provided at the center of the upper end face of the probe.

[0006] A high-density array eddy current sensor is disposed inside the probe for detecting the thread to be detected;

[0007] A signal acquisition module, which is connected to the high-density array eddy current sensor, is used to acquire signals from the high-density array eddy current sensor.

[0008] A data processing module, which is electrically connected to the signal acquisition module, is used to process the data from the signal acquisition module and construct a defect classification model;

[0009] A geared motor, which is connected to the connector via a connecting assembly, is used to drive the probe to rotate.

[0010] Preferably, the probe is a frustum, the diameter of which gradually decreases from top to bottom and is adapted to the drill bit to be tested. An external thread is provided on the outer peripheral wall of the frustum, and the external thread is adapted to the thread to be tested.

[0011] Preferably, the probe is a frustum, and an axial cavity is provided inside the frustum; the inner diameter of the cavity gradually increases from top to bottom and is adapted to the drill bit to be tested; an internal thread is provided on the inner peripheral wall of the cavity, and the internal thread is adapted to the thread to be tested.

[0012] Preferably, it also includes:

[0013] The display module is electrically connected to the data processing module and is used to display the recognition results of the data processing module.

[0014] Preferably, the high-density array eddy current sensor consists of multiple eddy current sensors arranged in a double row longitudinally; the spacing between adjacent eddy current sensors is equal to the tooth spacing of the thread structure, the sensor defect depth sensitivity is 0.2-0.3 mm, and the detection frequency is 1 MHz.

[0015] Preferably, the data processing module includes an analog signal amplifier, a filter, and an analog-to-digital converter, which are used to enhance, reduce noise, and digitize the data from the signal acquisition module, respectively; the analog signal amplifier has a gain of 20 times, and the filter has a bandwidth of 0.1-10kHz.

[0016] Preferably, the connector is composed of a first circular protrusion and a second circular protrusion arranged coaxially; the diameter of the first circular protrusion is smaller than the diameter of the second circular protrusion; the diameter of the second circular protrusion is smaller than the diameter of the probe.

[0017] Preferably, the connection component includes;

[0018] The bearing is sleeved on the outer periphery of the first circular protrusion, and its lower end face abuts against the second circular protrusion;

[0019] A slip ring, the lower end of which is connected to the first circular protrusion;

[0020] A coupling is connected to the upper end of the slip ring; the upper end of the coupling is connected to the main shaft of the geared motor.

[0021] The housing covers the outer periphery of the bearing, slip ring, coupling and main shaft, and its upper end is connected to the housing of the geared motor.

[0022] The beneficial effects of this utility model are: it is equipped with a probe, a high-density array eddy current sensor, a signal acquisition module, a data processing module and a geared motor, which enables non-destructive testing of the internal and external threads of the drill bit. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a drill bit internal and external thread array eddy current detection device according to the present invention.

[0024] Figure 2 This is a perspective view of Embodiment 1 of the present utility model.

[0025] Figure 3 This is a three-dimensional view of the probe in Embodiment 1 of this utility model.

[0026] Figure 4 This is an exploded view of Embodiment 1 of this utility model.

[0027] Figure 5 This is a perspective view of Embodiment 2 of the present invention.

[0028] Figure 6 This is a three-dimensional view of the probe in Embodiment 2 of this utility model.

[0029] Figure 7 This is an exploded view of Embodiment 2 of this utility model. Detailed Implementation

[0030] The utility model will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0031] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0032] Example 1

[0033] like Figure 1-4 As shown, the present invention provides a drill bit internal and external thread array eddy current detection device 1, comprising:

[0034] The probe 100 has an outer or inner peripheral wall adapted to the drill bit under test; the outer or inner peripheral wall has a threaded structure adapted to the thread to be tested on the drill bit; a connector is provided at the center of the upper end face of the probe 100; preferably, the probe 100 is a frustum, the diameter of which gradually decreases from top to bottom and is adapted to the drill bit under test, and an external thread is provided on the outer peripheral wall of the frustum, which is adapted to the thread to be tested. More preferably, the connector 110 consists of a first circular protrusion 111 and a second circular protrusion 112 arranged coaxially; the diameter of the first circular protrusion 111 is smaller than the diameter of the second circular protrusion 112; the diameter of the second circular protrusion 112 is smaller than the diameter of the probe 100.

[0035] A high-density array eddy current sensor 300 is disposed within the probe 100 for detecting the thread to be detected. Preferably, the high-density array eddy current sensor 300 consists of multiple eddy current sensors arranged in two rows longitudinally; the spacing between adjacent eddy current sensors is equal to the tooth spacing of the thread structure, the sensor defect depth sensitivity is 0.2 mm, and the detection frequency is 1 MHz.

[0036] The signal acquisition module 400 is connected to the high-density array eddy current sensor 300 and is used to acquire signals from the high-density array eddy current sensor.

[0037] A data processing module 500, electrically connected to the signal acquisition module 400, is used to process data from the signal acquisition module 400 and construct a defect classification model. Preferably, the data processing module 500 includes an analog signal amplifier 510, a filter 520, and an analog-to-digital converter 530, used for enhancing, reducing noise, and digitizing the data from the signal acquisition module, respectively; the analog signal amplifier 510 has a gain of 20, and the filter 520 has a bandwidth of 0.1 kHz.

[0038] A geared motor 600, connected to the connector 110 via a connecting assembly 700, drives the probe 100 to rotate. Preferably, the connecting assembly 700 includes: a bearing 710 sleeved on the outer periphery of the first circular protrusion, its lower end abutting against the second circular protrusion; a slip ring 720, its lower end connected to the first circular protrusion; a coupling 730 connected to the upper end of the slip ring; the upper end of the coupling connected to the main shaft 610 of the geared motor 600; and a housing 740 covering the outer periphery of the bearing 710, slip ring 720, coupling 730, and main shaft 610, its upper end connected to the housing of the geared motor 600. Preferably, it also includes a display module 800 electrically connected to the data processing module 500, used to display the recognition results of the data processing module 500.

[0039] Example 2

[0040] like Figure 1 and 4 As shown in Figure 7, the eddy current detection device 1 for internal and external threads of a drill bit according to this utility model includes:

[0041] The probe 200 has an outer or inner peripheral wall adapted to the drill bit under test; the outer or inner peripheral wall has a threaded structure adapted to the thread to be tested on the drill bit; a connector 210 is provided at the center of the upper end face of the probe 200. Preferably, the probe 200 is a frustum, with an axial cavity inside; the inner diameter of the cavity gradually increases from top to bottom and is adapted to the drill bit under test; an internal thread is provided on the inner peripheral wall of the cavity, which is adapted to the thread to be tested. More preferably, the connector 210 consists of a first circular protrusion 211 and a second circular protrusion 212 arranged coaxially; the diameter of the first circular protrusion 211 is smaller than the diameter of the second circular protrusion 212; the diameter of the second circular protrusion 212 is smaller than the diameter of the probe 200.

[0042] A high-density array eddy current sensor 300 is disposed within the probe for detecting the thread to be detected. Preferably, the high-density array eddy current sensor 300 consists of multiple eddy current sensors arranged in two rows longitudinally; the spacing between adjacent eddy current sensors is equal to the tooth spacing of the thread structure; the sensor defect depth sensitivity is 0.3 mm; and the detection frequency is 1 MHz.

[0043] The signal acquisition module 400 is connected to the high-density array eddy current sensor 300 and is used to acquire signals from the high-density array eddy current sensor 300.

[0044] A data processing module 500, electrically connected to the signal acquisition module 400, is used to process data from the signal acquisition module 400 and construct a defect classification model. Preferably, the data processing module 500 includes an analog signal amplifier 510, a filter 520, and an analog-to-digital converter 530, used for enhancing, reducing noise, and digitizing the data from the signal acquisition module, respectively; the analog signal amplifier 510 has a gain of 20, and the filter 520 has a bandwidth of 10kHz.

[0045] A geared motor 600, connected to the connector 110 via a connecting assembly 700, drives the probe 100 to rotate. Preferably, the connecting assembly 700 includes: a bearing 710 sleeved on the outer periphery of the first circular protrusion, its lower end abutting against the second circular protrusion; a slip ring 720, its lower end connected to the first circular protrusion; a coupling 730 connected to the upper end of the slip ring; the upper end of the coupling connected to the main shaft 610 of the geared motor 600; and a housing 740 covering the outer periphery of the bearing 710, slip ring 720, coupling 730, and main shaft 610, its upper end connected to the housing of the geared motor 600. Preferably, it also includes a display module 800 electrically connected to the data processing module 500, used to display the recognition results of the data processing module 500.

[0046] During use, the probe 100 / probe 200 is placed above the drill bit to be tested; the reduction motor 600 is turned on, driving the probe 100 / probe 200 to rotate, so that the threaded structure on the probe 100 / probe 200 fully engages with the thread to be tested; during the engagement process, the high-density array eddy current sensor 300 set in the probe 100 / probe 200 detects the thread to be tested; the signal acquisition module 400 is electrically connected to the high-density array eddy current sensor 300 and acquires the signal from the high-density array eddy current sensor 300; the data processing module 500 is electrically connected to the signal acquisition module 400 and processes the data from the signal acquisition module 400 to construct a defect classification model.

[0047] The beneficial effects of this utility model are: it is equipped with a probe, a high-density array eddy current sensor, a signal acquisition module, a data processing module and a geared motor, which enables non-destructive testing of the internal and external threads of the drill bit.

[0048] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A drill tool pin and box thread array eddy current inspection apparatus, characterized by, include: The probe has an outer or inner peripheral wall that is adapted to the drill bit to be tested; the outer or inner peripheral wall has a thread structure adapted to the thread to be tested on the drill bit; and a connector is provided at the center of the upper end face of the probe. A high-density array eddy current sensor is disposed inside the probe for detecting the thread to be detected; A signal acquisition module, which is connected to the high-density array eddy current sensor, is used to acquire signals from the high-density array eddy current sensor. A data processing module, which is electrically connected to the signal acquisition module, is used to process the data from the signal acquisition module and construct a defect classification model; A geared motor, which is connected to the connector via a connecting assembly, is used to drive the probe to rotate.

2. The drill tool pin and box thread array eddy current inspection apparatus of claim 1, wherein: The probe is in the shape of a frustum, the diameter of which gradually decreases from top to bottom and is adapted to the drill bit to be tested. An external thread is provided on the outer peripheral wall of the frustum, and the external thread is adapted to the thread to be tested.

3. The drill tool pin and box thread array eddy current inspection apparatus of claim 1, wherein: The probe is shaped like a frustum, with an axial cavity inside. The inner diameter of the cavity gradually increases from top to bottom and is adapted to the drill bit to be tested. An internal thread is provided on the inner circumferential wall of the cavity, which is adapted to the thread to be tested.

4. The drill tool pin and box thread array eddy current inspection apparatus of claim 2 or 3, wherein, Also includes: The display module is electrically connected to the data processing module and is used to display the recognition results of the data processing module.

5. The drill tool pin and box thread array eddy current inspection apparatus of claim 1, wherein: The high-density array eddy current sensor consists of multiple eddy current sensors arranged in a double row longitudinally; the spacing between adjacent eddy current sensors is equal to the tooth spacing of the thread structure, the sensor defect depth sensitivity is 0.2-0.3mm, and the detection frequency is 1MHz.

6. The drill tool pin and box thread array eddy current inspection apparatus of claim 1, wherein: The data processing module includes an analog signal amplifier, a filter, and an analog-to-digital converter, which are used to enhance, reduce noise, and digitize the data from the signal acquisition module, respectively; the analog signal amplifier has a gain of 20 times, and the filter has a bandwidth of 0.1-10kHz.

7. The drill tool pin and box thread array eddy current inspection apparatus of claim 1, wherein: The connector is composed of a first circular protrusion and a second circular protrusion arranged coaxially at the top and bottom; the diameter of the first circular protrusion is smaller than the diameter of the second circular protrusion; the diameter of the second circular protrusion is smaller than the diameter of the probe. The connection component includes; The bearing is sleeved on the outer periphery of the first circular protrusion, and its lower end face abuts against the second circular protrusion; A slip ring, the lower end of which is connected to the first circular protrusion; A coupling is connected to the upper end of the slip ring; the upper end of the coupling is connected to the main shaft of the geared motor. The housing covers the outer periphery of the bearing, slip ring, coupling and main shaft, and its upper end is connected to the housing of the geared motor.

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