Drilling tool thread defect ultrasonic detection auxiliary scanning device and detection method

Abstract

The invention belongs to the technical field of petroleum drilling tool detection, and provides a drilling tool thread defect ultrasonic detection auxiliary scanning device and a detection method, the drilling tool thread defect ultrasonic detection auxiliary scanning device comprises a fixing assembly, an adjusting assembly and a guiding detection assembly; the fixing assembly is used for abutting against and fixing the end part of the to-be-detected piece; the adjusting assembly comprises a telescopic rod, and the telescopic rod can penetrate through the fixing assembly in the axial direction to move into the to-be-detected piece and rotate relative to the fixing assembly. The guiding detection assembly is installed at one end, entering the to-be-detected member, of the telescopic rod, and is used for detecting the thread of the to-be-detected member. The telescopic rod capable of moving in the axial direction and rotating in the circumferential direction is adopted, and in the working state, the telescopic rod can drive the probe to enter the interior of a to-be-detected piece, move circumferentially along the inner wall from the inner diameter of a drilling tool joint and rotate by a circle in the radial direction at the root position of a thread for ultrasonic detection, so that the defect position of the thread is quickly found.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil drilling tool detection, and particularly relates to an ultrasonic detection auxiliary scanning device and detection method for drill pipe thread defects. Background Art

[0002] With the increasing intensity of oil exploration and exploitation, the drilling workload of deep wells, ultra-deep wells, complex wells, and special process wells has been increasing year by year. The operating environment of drill pipe threads is becoming increasingly harsh, and the stress is becoming more and more complex. Thread leakage and fracture failures occur frequently, prolonging the drilling cycle, increasing investment costs, and causing huge economic losses. At present, the longitudinal wave straight probe end face detection method is mainly used in China for the rapid detection of drill pipe thread defects. Due to the characteristics of ultrasonic waves and the structural characteristics of drill pipe threads, it is applicable to drill pipe threads with a flaw detection end face size greater than 8 mm, and the thread detection has great limitations. At the same time, there is a large flaw detection blind area in defect detection, the detection rate of defects less than 3 mm is low, and the detection accuracy is poor. Phased array ultrasonic detection, due to the scanning, deflection, and focusing characteristics of its probe, and the method of imaging using the primary reflection waves from the inner and outer surfaces corresponding to the thread, makes its defect detection rate and detection accuracy for workpieces higher. It will surely become the main technical means for high-precision and rapid detection of drill pipe thread defects in the oilfield exploration sector and for preventing drill pipe thread failures. As an important device for clamping the probe, the phased array scanning device is an important device that affects the effectiveness of the probe signal and the accuracy of image generation. Therefore, how to reasonably apply the phased array scanning device in the detection of drill pipe threads is an urgent problem to be solved. Summary of the Invention

[0003] In order to solve at least one problem in the background art, the present invention proposes an ultrasonic detection auxiliary scanning device and detection method for drill pipe thread defects.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An ultrasonic detection auxiliary scanning device for drill pipe thread defects includes a fixing component, an adjusting component, and a guiding and detecting component;

[0006] The fixing component is used to abut against the end of the workpiece to be detected and fix it;

[0007] The adjusting component includes a telescopic rod, which can move axially through the fixing component into the workpiece to be detected and rotate relative to the fixing component;

[0008] The guiding and detecting component is installed at one end of the telescopic rod entering the workpiece to be detected and is used to detect the threads of the workpiece to be detected.

[0009] Preferably, the workpiece to be detected is a rotating body with a hollow structure inside and threads on its outer surface.

[0010] Preferably, the fixing component includes a cushion block, a knob, a claw arm and a positioning disc;

[0011] The positioning disc abuts against the end of the component to be detected and is coaxially arranged;

[0012] A plurality of claw arms are provided, evenly distributed along the circumferential direction of the positioning disc, and the claw arms are L-shaped, one end is fixedly connected to the positioning disc, and the other end is threadedly connected with a knob;

[0013] The knob is arranged along the radial direction of the component to be detected, one end is fixedly connected to the cushion block, and the cushion block abuts against the circumferential side surface of the component to be detected.

[0014] Preferably, the cushion block is made of rubber material, and the knob is a butterfly knob.

[0015] Preferably, the adjusting component further includes a slewing bearing, a rotating disc, a gear and an adjusting knob;

[0016] The slewing bearing is installed at the center of the positioning disc, and the outer ring of the slewing bearing is in interference fit with the positioning disc;

[0017] The rotating disc is installed at the center of the rotating bearing and is in interference fit with the inner ring of the slewing bearing;

[0018] The telescopic rod is coaxially arranged with the rotating disc and relatively slides along the axial direction with respect to the rotating disc, and a tooth surface is also provided on the surface of the telescopic rod along the axial direction;

[0019] The gear is rotatably installed on the support, the support is fixedly installed on the surface of the rotating disc, and the gear meshes with the tooth surface of the telescopic rod;

[0020] One end of the adjusting knob is fixedly connected to the gear and is used to drive the gear to rotate.

[0021] Preferably, the cross section of the telescopic rod is a regular polygon, which is used to limit the relative rotation between the telescopic rod and the rotating disc.

[0022] Preferably, the guiding and detecting component includes a probe fixing bracket, a probe, a balance bracket and a guiding wheel;

[0023] A plurality of balance brackets are provided and are evenly installed along the circumferential direction at one end of the telescopic rod together with the probe fixing bracket; the end of the probe fixing bracket is used to install the probe, and the probe is used to detect the external thread of the component to be detected;

[0024] A plurality of the guiding wheels are installed on the corresponding balance brackets and abut against the inner wall of the component to be detected, and are used for guiding along the circumferential direction when the telescopic rod rotates.

[0025] Preferably, a scale disc is also coaxially installed on the positioning disc, which is used to obtain the rotation angle of the rotating disc.

[0026] A detection method is used for the above-mentioned ultrasonic detection auxiliary scanning device for drill thread defects.

[0027] Preferably, the steps include:

[0028] The fixing assembly is fixedly installed on the end of the object to be tested;

[0029] Control the telescopic rod to enter the thread starting position of the part to be tested along the axis;

[0030] Rotate the telescopic rod and use the probe in the guide detection assembly to perform ultrasonic detection of the threads at 360° from the inside to the outside of the part to be detected to obtain the position corresponding to the thread defect;

[0031] The telescopic rod is controlled to move a preset distance to the other end of the thread, and then the 360° thread is detected by the probe in the guide detection assembly until the thread detection is completed.

[0032] Preferably, rotating the telescopic rod and guiding the probe in the detection assembly to perform ultrasonic detection of the threads of the object to be detected from the inside to the outside of the object to be detected to obtain the position corresponding to the thread defect includes the following steps:

[0033] When the telescopic rod moves axially to the target position, the corresponding axial position is recorded as Xi, where m≥i≥1;

[0034] When the probe rotates around the axis of the telescopic rod and detects a thread defect, the rotation angle corresponding to the thread defect is Aj, where n≥j≥1.

[0035] Beneficial effects of the present invention:

[0036] 1. The present invention adopts a telescopic rod that can move axially and rotate circumferentially. In the working state, the telescopic rod can carry the probe into the interior of the part to be tested, move along the inner wall from the inner diameter of the drill joint, and radially rotate one circle at the root of the thread to perform ultrasonic testing, so as to quickly find the defective position of the thread;

[0037] 2. The scanning device of the present invention is installed on the part to be inspected, and the position is found according to the positioning disc. The butterfly knob is adjusted to make the rubber pad and the joint thread contact and fix firmly. The adjustment knob is turned to make the telescopic rod work, and the probe at the front end of the telescopic rod is moved longitudinally. The slewing bearing is adjusted so that the probe can rotate axially, and the thread is inspected and probed 360 degrees. At the same time, the front end of the telescopic rod is equipped with a guide wheel to increase the stability of the probe during movement. The operation is convenient and fast, the detection and installation efficiency is high, and the operation risk is small.

[0038] 3. The phased array ultrasonic detection auxiliary scanning device for drill tool threads provided by the present invention aims to address the characteristics of limited detection space and irregular thread geometry for drill tool threads. A mechanical auxiliary device is used to fixedly clamp the probe, ensuring the relative position of the probe is fixed and ensuring that the rolling of the positioning disk can accurately complete the coding of the probe position. Through the encoder, precise positioning and rapid high-precision detection of drill tool thread defects can be achieved.

[0039] 4. The method of the present invention can obtain the axial position and circumferential rotation angle of the telescopic rod through the encoder, thereby quickly detecting the position of the thread defect and improving the detection efficiency.

[0040] Other features and advantages of the present invention will be described in the subsequent description, and part of them will become obvious from the description or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0042] Figure 1 The structural schematic diagram of a phased array ultrasonic detection auxiliary scanning device for drill tool thread defects of the present invention is shown;

[0043] Figure 2 The schematic diagram of the installation position of the scale disk of the present invention is shown;

[0044] Figure 3 The flowchart of the detection method of a phased array ultrasonic detection auxiliary scanning device for drill tool thread defects of the present invention is shown;

[0045] Figure 4 The flowchart of the detection method of a phased array ultrasonic detection auxiliary scanning device for drill tool thread defects of the present invention is shown.

[0046] In the figure: 1, spacer block; 2, knob; 3, claw arm; 4, positioning disk; 5, slewing bearing; 6, rotating disk; 7, telescopic rod; 701, tooth surface; 8, gear; 9, adjusting knob; 10, probe fixing bracket; 11, probe; 12, balance bracket; 13, guide wheel; 14, scale disk. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] 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 clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Embodiment 1

[0049] An auxiliary scanning device for ultrasonic detection of drilling tool thread defects, such as Figure 1 and Figure 3 As shown, it includes a fixing component, an adjusting component, a guiding detection component and a part to be detected (denoted as D). The fixing component is used to abut against the end of the part to be detected and fix it; the adjusting component includes a telescopic rod 7, which can pass through the fixing component axially and move to the inside of the part to be detected, and rotate relative to the fixing component; the guiding detection component is installed at one end of the telescopic rod 7 entering the part to be detected, and is used to detect the threads of the part to be detected. In addition, the part to be detected (drilling tool) is a rotating body, which is a hollow structure inside and has threads processed on the outside.

[0050] The components of the above device will be described in detail below with reference to the accompanying drawings.

[0051] like Figure 1 As shown, the fixing assembly includes a cushion block 1, a knob 2, a claw arm 3 and a positioning disc 4. The positioning disc 4 abuts against the end of the part to be detected and is coaxially arranged; a plurality of claw arms 3 (generally three) are arranged, which are evenly distributed along the circumference of the positioning disc 4, and the claw arm 3 is L-shaped, with one end welded to the positioning disc 4 and the other end threadedly connected with the knob 2; and the knob 2 is arranged along the radial direction of the part to be detected, with one end fixedly connected to the cushion block 1, and the cushion block 1 abuts against the circumferential surface of the part to be detected.

[0052] It should be noted that the pad 1 is made of rubber material, which can prevent the fixing component from rotating in the circumferential direction and protect the threaded outer teeth of the part to be detected. The knob 2 is a butterfly knob. The main function of the fixing component is to fix the scanning device and the part to be detected together, thereby serving as a carrier for the adjustment component and the guide detection component.

[0053] Further, in Figure 1 In addition to the telescopic rod 7, the adjustment assembly also includes a slewing bearing 5, a rotating disk 6, a gear 8 and an adjustment knob 9. The slewing bearing 5 is installed at the center of the positioning disk 4, and the outer ring of the slewing bearing 5 is interference fit with the positioning disk; the rotating disk 6 is installed at the center of the slewing bearing 5 and is interference fit with the inner ring of the slewing bearing 5; Figure 1 and Figure 2It can be seen that the telescopic rod 7 is coaxially arranged with the rotating disc 6 and is slidably matched with the rotating disc 6 along the axial direction. A tooth surface 701 is also axially formed on the surface of the telescopic rod 7; the gear 8 is rotatably installed on the support, the support is fixedly installed on the surface of the rotating disc 6, and the gear 8 meshes with the tooth surface 701 of the telescopic rod 7; one end of the adjustment knob 9 is fixedly connected to the gear 8 and is used to drive the gear 8 to rotate. In addition, the cross section of the telescopic rod 7 is a regular polygon, which is used to limit the relative rotation between the telescopic rod 7 and the rotating disc 6.

[0054] It should be noted that the adjustment assembly can adjust the position of the telescopic rod 7. By rotating the adjustment knob 9, the gear 8 can be driven to rotate, and then the gear 8 drives the telescopic rod 7 to move axially, so as to adjust the axial position of the telescopic rod 7. At the same time, since the telescopic rod 7 is fixed on the rotating disc 6, the telescopic rod 7 and the rotating disc 6 can rotate together, so as to adjust the circumferential position of the telescopic rod 7.

[0055] It should be further noted that, as Figure 2 shown, a scale disc 14 is also coaxially installed on the positioning disc 4. When the rotating disc 6 rotates, the rotation angle of the rotating disc 6 can be obtained through the scale disc 14, and then its position can be known.

[0056] Furthermore, the guiding and detecting assembly includes a probe fixing bracket 10, a probe 11, a balance bracket 12 and a guiding wheel 13. A plurality of balance brackets 12 are provided and are evenly installed on one end of the telescopic rod 7 along the circumferential direction together with the probe fixing bracket 10; the end of the probe fixing bracket 10 is used to install the probe 11, and the probe 11 is used to detect the external thread of the workpiece to be detected; a plurality of guiding wheels 13 are installed on the corresponding balance brackets 12 and are abutted against the inner wall of the workpiece to be detected, and are used for guiding along the circumferential direction when the telescopic rod 7 rotates.

[0057] It should be noted that, aiming at the characteristics of limited thread detection space and irregular thread geometry of the workpiece to be detected, the probe fixing bracket 10 is used to fixedly clamp the probe 11 to ensure the relative position of the probe 11 is fixed, and to ensure that the rolling of the positioning disc 4 can accurately complete the coding of the position of the probe 11, so as to realize the accurate positioning and rapid high-precision detection of the thread defects of the drill tool (workpiece to be detected).

[0058] Embodiment 2

[0059] As Figure 4 shown, a detection method for an ultrasonic detection auxiliary scanning device for drill tool thread defects in Embodiment 1 includes the following steps:

[0060] S1: Fix the fixing component to the end of the component to be detected. After installing the positioning disc 4 at the end of the component to be detected, tighten the knob 2 and fix it with the three claw arms 3 on the outer ring. The contact surface between the claw arm 3 and the component to be detected is made of rubber material to prevent circumferential rotation and protect the external thread. S2: Control the telescopic rod 7 to enter the starting position of the thread of the component to be detected along the axis. S3: Rotate the telescopic rod 7, and use the probe 11 in the guiding detection component to perform ultrasonic detection on the 360° thread to obtain the position corresponding to the thread defect. Specifically, when the telescopic rod 7 moves axially to the target position, the corresponding axial position is denoted as Xi, where m≥i≥1; when the probe 11 rotates around the axis of the telescopic rod 7 and detects a thread defect, the rotation angle corresponding to the thread defect is Aj, where n≥j≥1. S4: Control the telescopic rod 7 to move a preset distance towards the other end of the thread, and then use the probe 11 in the guiding detection component to detect the 360° thread from the inside to the outside of the component to be detected until the thread detection is completed.

[0061] It should be noted that in step S3, X1 corresponds to the starting position of the thread, Xm corresponds to the ending position of the thread, A1 corresponds to the initial position with a rotation angle of 0, and An corresponds to the position after rotating 360° and returning to the initial position. In addition, in steps S1 - S2, when the telescopic rod 7 moves to the starting position of the thread, record the axial position of this point as X1, and set the starting position of the circumferential rotation of the telescopic rod 7. Then, after the telescopic rod 7 rotates, if the probe 11 detects the position of the thread defect, obtain the corresponding scale A1 of this position through the scale disk 14. Then, through X1 and A1, it can be known which position of the thread has a defect. If there are multiple defect positions, the scales can be A2, A3... An.

[0062] Similarly, when the telescopic rod 7 moves axially, the position can be denoted as X2, and then follow the above process to obtain the defect position of the thread after rotating one circle at the position X2. Finally, the positions where the telescopic rod 7 moves axially can be denoted as X1, X2... Xm. By detecting m positions and obtaining n thread defects at each position, all the thread defects of the component to be detected can be obtained.

[0063] It should be further noted that when performing phased array ultrasonic detection of thread defects, the probe 11 composed of several piezoelectric wafers controls each wafer in the array to emit and receive ultrasonic waves from the corresponding inner wall of the drill pipe thread according to a certain delay rule, realizing functions such as beam scanning, deflection, and focusing, to perform inspections on the covered thread area. After signal processing and conversion, waveforms and high-quality images are displayed on devices such as oscilloscopes, so as to judge whether the thread has defects.

[0064] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultrasonic detection auxiliary scanning device for drill tool threads, characterized in that, It includes a fixing component, an adjusting component and a guiding detection component; The fixing assembly is used to abut against and fix the end of the piece to be detected; The adjustment component comprises a telescopic rod (7), and the telescopic rod (7) can pass through the fixed component along the axial direction and move to the inside of the to-be-detected component, and rotate relative to the fixed component; The guide detection component is installed at one end of the telescopic rod (7) that enters the piece to be detected, and is used to detect the thread of the piece to be detected.

2. The ultrasonic detection auxiliary scanning device for drill tool thread defects according to claim 1, characterized in that, The object to be detected is a rotating body with a hollow structure inside and threads arranged on the outer surface.

3. The ultrasonic detection auxiliary scanning device for drill tool thread defects according to claim 2, wherein, The fixing assembly comprises a cushion block (1), a knob (2), a claw arm (3) and a positioning disc (4); The positioning disc (4) abuts against the end of the piece to be detected and is coaxially arranged; A plurality of claw arms (3) are provided, which are evenly distributed along the circumference of the positioning disc (4), and the claw arm (3) is L-shaped, with one end fixedly connected to the positioning disc (4) and the other end being threadedly connected to the knob (2); The knob (2) is arranged along the radial direction of the part to be detected, and one end is fixedly connected to the cushion block (1), and the cushion block (1) abuts against the peripheral side surface of the part to be detected.

4. The ultrasonic detection auxiliary scanning device and detection method for drill tool thread defects according to claim 3, characterized in that The cushion block (1) is made of rubber, and the knob (2) is a butterfly knob.

5. The ultrasonic detection auxiliary scanning device for drill tool thread defects according to claim 3, characterized in that The adjustment assembly also includes a slewing bearing (5), a rotating disk (6), a gear (8) and an adjustment knob (9); The slewing bearing (5) is installed at the center of the positioning disc (4), and the outer ring of the slewing bearing (5) is interference fit with the positioning disc (4); The rotating disk (6) is installed at the center of the rotating bearing (5) and has an interference fit with the inner ring of the slewing bearing (5); The telescopic rod (7) is coaxially arranged with the rotating disk (6) and slides relative to the rotating disk (6) along the axial direction. The surface of the telescopic rod (7) is also provided with a tooth surface (701) along the axial direction. The gear (8) is rotatably mounted on a support, the support is fixedly mounted on the surface of the rotating disk (6), and the gear (8) is meshed with a tooth surface (701) of the telescopic rod (7); One end of the adjusting knob (9) is fixedly connected to the gear (8) and is used to drive the gear (8) to rotate.

6. The ultrasonic detection auxiliary scanning device for drill tool thread defects according to claim 5, wherein, The cross section of the telescopic rod (7) is a regular polygon, which is used to limit the relative rotation of the telescopic rod (7) and the rotating disk (6).

7. An ultrasonic detection auxiliary scanning device for drill tool thread defects according to any one of claims 3-6, characterized in that The guide detection assembly comprises a probe fixing frame (10), a probe (11), a balance bracket (12) and a guide wheel (13); A plurality of the balancing brackets (12) are provided, and are evenly mounted on one end of the telescopic rod (7) along the circumferential direction together with the probe fixing bracket (10); the end of the probe fixing bracket (10) is used to mount the probe (11), and the probe (11) is used to detect the external thread of the part to be detected; The plurality of guide wheels (13) are mounted on corresponding balancing brackets (12) and abut against the inner wall of the part to be detected, and are used to guide the telescopic rod (7) in the circumferential direction when the telescopic rod (7) rotates.

8. An ultrasonic detection auxiliary scanning device for drill tool thread defects according to claim 7, characterized in that, A scale plate (14) is also coaxially mounted on the positioning disc (4) for obtaining the rotation angle of the rotating disc (6).

9. A detection method, characterized in that, An auxiliary scanning device for ultrasonic detection of drill thread defects as described in any one of claims 1 to 8.

10. A detection method according to claim 9, characterized in that, The following steps are involved: The fixing assembly is fixedly installed on the end of the object to be tested; Controlling the telescopic rod (7) to enter the thread start position of the part to be inspected along the axis; Rotate the telescopic rod (7), and use the probe (11) in the guiding and detecting component to perform ultrasonic detection on the 360° thread from the inside to the outside of the workpiece to be detected, and obtain the position corresponding to the thread defect; Control the telescopic rod (7) to move a preset distance towards the other end of the thread, and then use the probe (11) in the guiding and detecting component to detect the 360° thread until the thread detection is completed.

11. A detection method according to claim 10, characterized in that, Rotate the telescopic rod (7), and use the probe (11) in the guiding and detecting component to perform ultrasonic detection on the 360° thread from the inside to the outside of the workpiece to be detected, and obtain the position corresponding to the thread defect, including the following steps: When the telescopic rod (7) moves axially to the target position, the corresponding axial position is denoted as Xi, where m≥i≥1; When the probe (11) rotates around the axis of the telescopic rod (7) and detects a thread defect, the rotation angle corresponding to the thread defect is Aj, where n≥j≥1.

Images