A drill pipe automatic flaw detection device

Abstract

The present invention relates to an automatic flaw detection device for a drill pipe, comprising a frame, a lifting plate arranged on the frame, and a lifting driver. The lifting plate is provided with a probe assembly and a decontamination assembly, the probe assembly comprises a probe mounting ring and a scanning probe, the probe mounting ring comprises a mounting ring left portion and a mounting ring right portion, and the decontamination assembly comprises a connecting frame and a decontamination rope arranged on the connecting frame. The automatic flaw detection device for a drill pipe of the present invention realizes scanning of the drill pipe through the arrangement of the probe assembly, and realizes the decontamination function of the drill pipe through the arrangement of the decontamination assembly. The detection personnel do not need to manually decontaminate the drill pipe, which greatly reduces the detection risk and improves the detection efficiency and accuracy.

Description

Technical Field

[0001] The invention relates to a flaw detection device, in particular to an automatic flaw detection device for a drill rod. Background Art

[0002] With the vigorous development of national science and technology and economy, the amount of resource extraction is gradually increasing, which in turn promotes the continuous development of industrial flaw detection. In the oil extraction industry, common defects on drill pipes include internal and external surface cracks, internal and external surface corrosion pits, external surface card grooves, punctures, etc. In order to avoid production accidents, inspection personnel need to use ultrasonic shear wave detection technology to detect cracks and corrosion pits on it.

[0003] At present, when inspecting drill pipes on site, flaw detectors need to carry portable ultrasonic flaw detectors on their backs and hold small probes for contact flaw detection when the drill pipe is raised. Since there are about 800 drill pipes in each oil well, a single flaw detector needs to conduct continuous inspections for 30 hours before the inspection is completed. This places high demands on the physical strength and energy of the inspectors. Although 2 to 3 inspectors are generally deployed for a single trip, the work intensity and the safety environment of the drilling platform can easily accelerate the physical fatigue of the inspectors, and the labor intensity of a single inspector is relatively high; secondly, during the drilling process, the inspectors need to stand at the wellhead for manual flaw detection, and the oil film on the drill pipe needs to be manually removed before flaw detection, which has a high operational risk; in addition, the inspectors are prone to incorrect test results during long-term continuous operations, thereby reducing the accuracy of the inspection. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a drill pipe automatic flaw detection device which is easy to operate, has low risk, and has high detection efficiency and accuracy.

[0005] The drill pipe automatic flaw detection device of the present invention comprises a frame, a lifting plate arranged on the frame, and a lifting driver for driving the lifting plate to lift and lower. The lifting plate is provided with a probe assembly and a decontamination assembly. The probe assembly comprises a probe mounting ring and a plurality of scanning probes arranged on the inner wall of the probe mounting ring. The probe mounting ring comprises a mounting ring left portion and a mounting ring right portion. The lifting plate is provided with a mounting ring displacement driver which can drive the mounting ring left portion and the mounting ring right portion to move toward or away from each other. The decontamination assembly comprises a connecting frame and a decontamination rope arranged on the connecting frame. The lifting plate is also provided with a connecting frame driver which drives the connecting frame to move laterally.

[0006] The advantages of the drill pipe automatic flaw detection device are that it realizes the scanning of the drill pipe through the setting of the probe assembly, and realizes the decontamination function of the drill pipe through the setting of the decontamination assembly. The setting of the lifting drive, the mounting ring displacement drive and the connecting frame drive realizes the automatic decontamination and scanning of the drill pipe. The inspection personnel do not need to manually decontaminate the drill pipe, which greatly reduces the inspection risk and improves the efficiency and accuracy of the inspection.

[0007] Furthermore, in the automatic flaw detection device for drill rods of the present invention, the connecting frame includes an L-shaped slide plate which can be laterally slidably arranged on the surface of the lifting plate, a mounting rod with a rear end arranged on the surface of the L-shaped slide plate, and two mounting plates arranged on the mounting rod, and the two ends of the decontamination rope are respectively arranged on the mounting plates on the front and rear sides.

[0008] This solution realizes the installation of the decontamination rope. During installation, the length of the decontamination rope is longer than the distance between the two mounting plates, which makes it have a certain redundancy so as to completely surround the drill rod.

[0009] Furthermore, in the drill pipe automatic flaw detection device of the present invention, the decontamination rope is a steel wire rope.

[0010] Using wire rope as decontamination rope not only has good decontamination effect, but also has a long service life.

[0011] Furthermore, in the drill rod automatic flaw detection device of the present invention, a lifting drive motor is arranged on the top of the frame, a drive plate fixedly connected to the lifting plate is arranged on the rear surface of the lifting plate, the output end of the lifting drive motor is connected to the screw rod, and the screw rod is threadedly connected to the drive plate.

[0012] This solution realizes the lifting and lowering driving function of the lifting plate. In addition, a cylinder, an oil cylinder, etc. can also be used as a lifting drive. Its specific structure and installation method are conventional technologies and will not be repeated here.

[0013] Furthermore, in the drill rod automatic flaw detection device of the present invention, the mounting ring displacement driver includes a gear drive motor whose body is arranged on the rear surface of the lifting plate, a gear located on the front side of the lifting plate and connected to the output shaft of the gear drive motor, and two racks respectively located on the upper and lower sides of the gear and arranged on the surface of the lifting plate for laterally movement, the gear is meshed with the rack, and the end of the rack is connected to a connecting arm, one end of the connecting arm is fixedly connected to the rack, and the other end is fixedly connected to the left part or the right part of the mounting ring.

[0014] This solution realizes the lateral displacement driving function of the left and right parts of the mounting ring. In addition, two sets of linear driving devices such as air cylinders and oil cylinders can be used as mounting ring drivers to drive the left and right parts of the mounting ring to move respectively. The structure and installation method are conventional technologies and will not be described here.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it in accordance with the contents of the specification, the embodiments of the present invention are described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the drill pipe automatic flaw detection device, in which the lifting drive motor and the screw rod and other components are not shown;

[0017] Figure 2 yes Figure 1 Top view of the drill pipe automated flaw detection device;

[0018] Figure 3 yes Figure 1 Right view of the drill pipe automatic flaw detection device;

[0019] Figure 4 yes Figure 1 A three-dimensional diagram of the drill pipe automated flaw detection device;

[0020] Figure 5 It is a three-dimensional diagram of the lifting plate, the probe assembly and the decontamination assembly;

[0021] Figure 6 It is a three-dimensional diagram of the lifting plate and its upper parts;

[0022] Figure 7 is a stereogram of the probe mounting ring;

[0023] Figure 8 It is a stereoscopic view of the right or left part of the mounting ring;

[0024] Fig. 9 is a three-dimensional diagram of the connecting frame and the decontamination rope thereon;

[0025] Fig.10 This is the usage status diagram of the drill pipe automatic flaw detection device;

[0026] Fig.11 This is a usage status diagram of the drill pipe automatic flaw detection device from another angle.

[0027] In the figure, a frame 1, a lifting plate 2, a probe mounting ring 3, a scanning probe 4, a mounting ring left part 5, a mounting ring right part 6, a connecting frame 7, a decontamination rope 8, a slider 9, a vertical guide rail 10, a lifting drive motor 11, a screw 12, a drive plate 13, a drill rod 14, an annular protective plate 15, a gear drive motor 18, a gear 19, a rack 20, a guide block 21, a transverse guide rail 22, a transverse slide 23, a connecting arm 24, an L-shaped slide 25, a mounting rod 26, and a mounting plate 27. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] Embodiment 1:

[0030] See also Figures 1 to 11 The drill pipe automatic flaw detection device of this embodiment includes a frame 1, a lifting plate 2 arranged on the frame, and a lifting driver for driving the lifting plate to lift. A probe assembly and a decontamination assembly are arranged on the lifting plate. The probe assembly includes a probe mounting ring 3 and a plurality of scanning probes 4 arranged on the inner wall of the probe mounting ring. The probe mounting ring includes a mounting ring left part 5 and a mounting ring right part 6. The lifting plate is provided with a mounting ring displacement driver that can drive the mounting ring left part and the mounting ring right part to move toward or away from each other. The decontamination assembly includes a connecting frame 7 and a decontamination rope 8 arranged on the connecting frame. The lifting plate is also provided with a connecting frame driver that drives the connecting frame to move horizontally.

[0031] The drill rod automatic flaw detection device of the present invention realizes the scanning of the drill rod by setting the probe assembly, and realizes the decontamination function of the drill rod by setting the decontamination assembly. The setting of the lifting drive, the mounting ring displacement drive and the connecting frame drive realizes the automatic decontamination and scanning of the drill rod, and the inspection personnel do not need to manually decontaminate the drill rod, which greatly reduces the inspection risk and improves the efficiency and accuracy of the inspection.

[0032] In this embodiment, the rack is a frame-type rack, and the profiles on both sides of the bottom end thereof protrude from the front surface of the frame-type rack to make the frame-type rack as a whole more stable.

[0033] The lifting plate is a rounded rectangular plate, and its rear surface is slidably arranged on a vertical guide rail 10 on the surface of the frame through a slider 9.

[0034] The lifting drive is used to drive the lifting plate to achieve lifting and lowering, and it can be a motor screw type lifting device or a lifting drive device such as a cylinder or oil cylinder. Preferably, in this embodiment, the lifting drive includes a lifting drive motor 11 arranged at the top of the frame, the output end of which is connected to a screw 12, the screw is threadedly connected to a drive plate 13 below it, and the end of the drive plate is fixed to the rear surface of the lifting plate. During lifting, the lifting drive motor drives the screw to rotate, thereby driving the drive plate engaged with the screw thread and the lifting plate fixed to the drive plate to lift and lower along the vertical guide rail.

[0035] The probe mounting ring is used to install the scanning probe. It has an overall ring-shaped structure. The top and bottom surfaces are both provided with an annular protective plate 15 whose center hole is slightly smaller than the diameter of the drill pipe 14 to protect the scanning probe on the probe mounting ring. Similar to the probe mounting ring, the annular protective plate is also composed of two half rings.

[0036] The probe mounting ring is composed of a left portion of the mounting ring and a right portion of the mounting ring, and the scanning probe is mounted on its inner wall. Specifically, the end face of the mounting wedge of the scanning probe is a curved surface to fit the surface of the drill pipe. The electrical connection end of the scanning probe is arranged on the inner wall and is connected to the external control cabinet through a wire. In this embodiment, the scanning probe includes two circles of probe assemblies, each group of probe assemblies includes 7 scanning probes, and the scanning probes of the upper and lower circles of probe assemblies are staggered, so that the drill pipe can be scanned as completely as possible.

[0037] The mounting ring displacement driver is used to drive the left and right parts of the mounting ring to move toward or away from each other, so that the left and right parts of the mounting ring can be combined into a complete probe mounting ring or separated after scanning. The left and right parts of the mounting ring can be driven and moved by separate displacement driving devices, such as air cylinders, oil cylinders, and electric cylinders, or can be linked by a gear rack assembly.

[0038] In this embodiment, the mounting ring displacement driver includes a gear drive motor 18 whose body is arranged on the rear surface of the lifting plate. The output shaft of the gear drive motor passes through the lifting plate and is connected to the gear 19. The upper and lower sides of the gear are respectively provided with racks 20 meshing with the gears. A guide block 21 fixedly connected to the lifting plate is arranged on the side of the rack away from the gear. The guide block is provided with a guide groove adapted to the rack to guide the rack to move laterally. The upper and lower sides of the gear are also respectively provided with transverse guide rails 22 and transverse slides 23 adapted to the transverse guide rails. The end of the rack is fixedly connected to the transverse slide on the corresponding side. A connecting arm 24 is also connected to the transverse slide, one end of the connecting arm is fixed to the transverse slide, and the other end is fixedly connected to the left part or the right part of the mounting ring. When working, the output shaft of the gear drive motor drives the gear to rotate, thereby driving the racks on the upper and lower sides to move toward each other along the direction of the transverse guide rail, thereby causing the two connecting arms and the left and right parts of the mounting ring thereon to move toward each other or away from each other.

[0039] The decontamination rope is used to remove oil stains on the drill pipe. In this embodiment, there are two groups of decontamination ropes, which are located below the probe mounting ring. The connecting frame is used to install the decontamination rope, and the connecting frame driver is used to drive the decontamination rope to move laterally until the decontamination rope fits the surface of the drill pipe. Similarly, the connecting frame driver can be a separate linear displacement drive device such as a cylinder or an oil cylinder to drive the two connecting frames and the connecting ropes thereon to move respectively. In addition, it can also be a linkage drive device similar to the above-mentioned rack and pinion assembly to drive the two connecting ropes to move toward each other. Its specific structure and principle are similar to those of the mounting ring displacement driver, which will not be repeated here.

[0040] During the inspection, the rack is placed at the wellhead, and the probe mounting ring is aligned with the drill pipe. In the initial state, the left and right parts of the mounting ring are separated, and the decontamination ropes on both sides are also separated. The drill pipe is lifted to the rack by the crane and remains stationary. Then, the decontamination ropes on both sides move toward each other under the drive of the connecting frame driver until both decontamination ropes are tightly fitted with the surface of the drill pipe. Since the decontamination ropes have a certain degree of flexibility, the two decontamination ropes can basically surround the drill pipe. After the decontamination ropes are in close contact with the drill pipe, the lifting plate drives the connecting frame and the decontamination ropes on it to rise and fall under the drive of the lifting drive, thereby removing the oil stains on the surface of the drill pipe. After the oil stains on the surface of the drill pipe are removed, the lifting plate stops, and after the decontamination ropes are restored to their original position under the drive of the connecting frame driver, the left and right parts of the mounting ring move toward each other under the drive of the mounting ring displacement driver until the scanning probes on them are in contact with the surface of the drill pipe. At this time, the left and right parts of the mounting ring are combined into a complete probe mounting ring, and the operator can scan the drill pipe with the scanning probe. After the scanning is completed, the left and right parts of the mounting ring are driven by the mounting ring displacement driver to move back to each other and return to their original positions, and the drill pipe moves upward to the next drill pipe to be tested under the action of the crane. At this time, the operator completes the inspection of the drill pipe in a similar way as above.

[0041] From the above description, it can be seen that the drill rod automatic flaw detection device realizes automatic decontamination of the drill rod through the decontamination component, and realizes automatic flaw detection of the drill rod through the probe component. Compared with the original drill rod flaw detection device, it is safer, more convenient to operate, and has higher detection efficiency.

[0042] Preferably, the drill pipe automatic flaw detection device of this embodiment, the connecting frame includes an L-shaped slide plate 25 which can be laterally slidably arranged on the surface of the lifting plate, a mounting rod 26 whose rear end is arranged on the surface of the L-shaped slide plate, and two mounting plates 27 arranged on the mounting rod, and the two ends of the decontamination rope are respectively arranged on the mounting plates on the front and rear sides.

[0043] This solution realizes the installation of the decontamination rope. During installation, the length of the decontamination rope is longer than the distance between the two mounting plates, which makes it have a certain redundancy so as to completely surround the drill rod.

[0044] Preferably, in the drill pipe automatic flaw detection device of this embodiment, the decontamination rope is a steel wire rope.

[0045] Using wire rope as decontamination rope not only has good decontamination effect, but also has a long service life.

[0046] Preferably, in the drill rod automatic flaw detection device of this embodiment, a lifting drive motor 11 is arranged at the top of the frame, a drive plate 13 fixedly connected to the lifting plate is arranged on the rear surface of the lifting plate, and the output end of the lifting drive motor is connected to the screw rod 12, and the screw rod is threadedly connected to the drive plate.

[0047] This solution realizes the lifting and lowering driving function of the lifting plate. In addition, a cylinder, an oil cylinder, etc. can also be used as a lifting drive. Its specific structure and installation method are conventional technologies and will not be repeated here.

[0048] Preferably, in the drill pipe automatic flaw detection device of this embodiment, the mounting ring displacement driver includes a gear drive motor 18 whose body is arranged on the rear surface of the lifting plate, a gear 19 located on the front side of the lifting plate and connected to the output shaft of the gear drive motor, and two racks 20 respectively located on the upper and lower sides of the gear and arranged on the surface of the lifting plate for laterally movement, the gear is meshed with the rack, and the end of the rack is connected to a connecting arm 24, one end of the connecting arm is fixedly connected to the rack, and the other end is fixedly connected to the left part or the right part of the mounting ring.

[0049] This solution realizes the lateral displacement driving function of the left and right parts of the mounting ring. In addition, two sets of linear driving devices such as air cylinders and oil cylinders can be used as mounting ring drivers to drive the left and right parts of the mounting ring to move respectively. The structure and installation method are conventional technologies and will not be described here.

[0050] The above are only preferred embodiments of the present invention, which are used to assist those skilled in the art to implement the corresponding technical solutions, and are not used to limit the scope of protection of the present invention, which is defined by the attached claims. It should be pointed out that for those of ordinary skill in the art, a number of equivalent improvements and variations can be made on the basis of the technical solution of the present invention, and these improvements and variations should also be regarded as the scope of protection of the present invention. At the same time, it should be understood that although this specification is described in accordance with the above-mentioned embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions of each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic flaw detection device for drill pipe, characterized in that: The invention comprises a frame (1), a lifting plate (2) arranged on the frame, and a lifting driver for driving the lifting plate to lift. The lifting plate is provided with a probe assembly and a decontamination assembly. The probe assembly comprises a probe mounting ring (3) and a plurality of scanning probes (4) arranged on the inner wall of the probe mounting ring. The probe mounting ring comprises a mounting ring left portion (5) and a mounting ring right portion (6). The lifting plate is provided with a mounting ring displacement driver capable of driving the mounting ring left portion and the mounting ring right portion to move toward or away from each other. The decontamination assembly comprises a connecting frame (7) and a decontamination rope (8) arranged on the connecting frame. The lifting plate is also provided with a connecting frame driver for driving the connecting frame to move laterally.

2. The drill pipe automatic flaw detection device according to claim 1 is characterized in that: The connecting frame comprises an L-shaped slide plate (25) which can be laterally slidably arranged on the surface of the lifting plate, a mounting rod (26) whose rear end is arranged on the surface of the L-shaped slide plate, and two mounting plates (27) arranged on the mounting rod, and the two ends of the decontamination rope are respectively arranged on the mounting plates on the front and rear sides.

3. The drill pipe automatic flaw detection device according to claim 1 is characterized in that: The decontamination rope is a steel wire rope.

4. The automatic flaw detection device for drill pipe according to claim 1 is characterized in that: A lifting drive motor (11) is arranged at the top of the frame, a drive plate (13) fixedly connected to the lifting plate is arranged on the rear surface of the lifting plate, an output end of the lifting drive motor is connected to a screw rod (12), and the screw rod is threadedly connected to the drive plate.

5. The drill pipe automatic flaw detection device according to claim 1 is characterized in that: The mounting ring displacement driver comprises a gear drive motor (18) whose body is arranged on the rear surface of the lifting plate, a gear (19) located on the front side of the lifting plate and connected to the output shaft of the gear drive motor, and two racks (20) located on the upper and lower sides of the gear and arranged on the surface of the lifting plate so as to be laterally movable, the gear being meshed with the rack, and a connecting arm (24) being connected to the end of the rack, one end of the connecting arm being fixedly connected to the rack, and the other end being fixedly connected to the left part or the right part of the mounting ring.

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