Wellhead drill rod magnetic flux leakage detection device

Abstract

The utility model relates to the technical field of wellhead drilling tool detection devices, and discloses a wellhead drilling rod magnetic flux leakage detection device, which comprises a bottom mechanism and a flaw detection mechanism, the bottom mechanism comprises a bottom plate, two pivots, four first connecting rings and four second connecting rings, and the flaw detection mechanism comprises two first detection units and two second detection units. In the use process of the device, when a drill bit passes through the centers of the four detection units from top to bottom, the first detection unit and the second detection unit on the same side and the opposite side can be opened firstly, and the two pivots slide towards the outer side in the sliding grooves through the sliding blocks; then, the detection units on the same side rotate around the pivots to ensure that the drill bits in a certain size range smoothly pass through, and after the drill bits pass through the round holes, the stretched tension springs recover elastic deformation, so that the four detection units are automatically reset and are attached to the drill rod in pairs, and the inner walls are attached to the drill rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to wellhead drilling rig detection device technical field especially relates to a wellhead drill pipe magnetic flux leakage detection device. BACKGROUND

[0002] Wellhead drill pipe magnetic flux leakage detection is the use of magnetic flux leakage method, with the help of permanent magnetization of drill pipe axial. Once the drill pipe exists such as crack, hole, wear, corrosion and other defects, these defects will cause the magnetic field in the drill pipe to leak into the air, and then form a magnetic flux leakage field. At this time, the magnetic field sensor can pick up the magnetic flux leakage field, so as to judge whether the drill pipe has defects. It is worth noting that the size of the drill pipe defect and the magnetic flux leakage field intensity are positively correlated, so by analyzing the magnetic flux leakage field intensity, the size of the defect can be judged. The detection system detects during the drill pipe out of the well, without the need for a special detection site, the detection method is flexible and easy to realize automation. This not only reduces the labor intensity, but also simplifies the detection process and saves the detection cost. The defect magnetic flux leakage detection device is placed on the wellhead table. When drilling, the magnetic flux leakage method is used to collect the magnetic flux leakage field signal generated by the defect. The detection signal is amplified, filtered and processed in a wireless manner to a computer, and then processed by software. The final detection result can be displayed, stored and printed.

[0003] After searching, the existing patent (publication number: CN207850983U) discloses a "drill pipe magnetic flux leakage detector, including drill pipe conveying device and electromagnetic eddy current detection device;The drill pipe conveying device includes drill pipe transverse conveyor belt, drill pipe longitudinal conveying wheel, longitudinal wheel motor and drill pipe lifting rod;The drill pipe transverse conveyor belt is configured on the side of the drill pipe conveying device, and the drill pipe transverse conveyor belt is used for conveying the drill pipe transversely;The drill pipe longitudinal conveying wheel is used for conveying the drill pipe longitudinally, and the drill pipe is sent into the electromagnetic eddy current detection device for detection;The longitudinal wheel motor is used for providing power for the drill pipe longitudinal conveying wheel, and the conveying direction of the drill pipe transverse conveyor belt and the rotation direction of the drill pipe longitudinal conveying wheel are perpendicular to each other;The drill pipe lifting rod is configured on the side of the drill pipe longitudinal conveying wheel, one end of the drill pipe lifting rod is configured on the drill pipe conveying device through the rotating shaft, and the other end of the drill pipe lifting rod is a lifting handle.

[0004] The inventor found that the prior art has the following problems in the process of realizing the present application: the above-mentioned comparative patent provides a drill pipe magnetic flux leakage detector by setting drill pipe transverse conveyor belt, drill pipe longitudinal conveying wheel, longitudinal wheel motor and drill pipe lifting rod and other components, but it is not convenient to detect in the process of drilling, which conflicts with the drilling process, and the detection efficiency needs to be improved. Therefore, the technical personnel in the art provide a wellhead drill pipe magnetic flux leakage detection device to solve the problems in the background art. UTILITY MODEL CONTENTS

[0005] The utility model discloses a well mouth drill rod magnetic flux leakage detection device, when the drill bit passes through the center of four detection units from top to bottom, the first detection unit and the second detection unit of the same side and the opposite side are first opened, the two pivots slide outward in the sliding slot with the help of the sliding block, then the detection unit of the same side rotates around the pivot to ensure that the drill bit of a certain size range passes through smoothly, and the stretched tension spring restores the elastic deformation after the drill bit passes through the round hole, so that the four detection units are automatically reset and are reattached to each other and the inner wall of the drill pipe.

[0006] To achieve the above object, the utility model provides the following technical scheme: a well mouth drill rod magnetic flux leakage detection device, including bottom mechanism and detection mechanism, the bottom mechanism includes bottom plate, two pivots, four first connecting rings and four second connecting rings, the detection mechanism includes two first detection units and two second detection units, four second connecting rings are fixedly connected to two first detection units rear end near the outer side middle position through connecting rod and are biased up and down, four first connecting rings are fixedly connected to two second detection units front end near the outer side through connecting rod and are biased up and down.

[0007] Further, the middle position and the rear end middle position of the both sides of the bottom plate are fixedly provided with handles, and a round hole is formed in the center of the lower end of the bottom plate.

[0008] Further, the upper end of the bottom plate near the middle position of the both sides is fixedly provided with an L-shaped plate, and a sliding slot is formed in the inner side position of the two L-shaped plates near the middle position of the both sides of the upper end of the bottom plate.

[0009] Further, the shaft body of the two pivots is symmetrically provided with four annular grooves, four first connecting rings are rotatably arranged in the upper and lower two annular grooves of the four annular grooves of the same side, and four second connecting rings are rotatably arranged in the two annular grooves near the middle of the four annular grooves of the same side.

[0010] Further, the two first detection units and the two second detection units are the same in size and structure.

[0011] Further, the two first detection units and the two second detection units are the same in size and structure.

[0012] Further, the two first detection units and the two second detection units are fixedly provided with probes at the middle positions inside.

[0013] Further, the two first detection units and the two second detection units are fixedly provided with buffers at the upper end inner edge positions.

[0014] The well mouth drill pipe magnetic flux leakage detection device has the following beneficial effects:

[0015] 1. The well mouth drill pipe magnetic flux leakage detection device can ensure that drill bits of a certain size range can smoothly pass through, improve the universality and adaptability of the device, the buffers can effectively buffer the impact force generated by the drill bits on the upper ends of the four detection units, prolong the service life of the device, reduce equipment maintenance cost and replacement frequency, and ensure the continuous and stable performance of the detection work. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of the shaft of the utility model;

[0017] Figure 2 is a schematic view of the shaft of the utility model from the rear end;

[0018] Figure 3 is a schematic view of the shaft of the utility model from the lower end;

[0019] Figure 4 is a schematic view of the shaft of the utility model from the rear end;

[0020] Figure 5 is a schematic view of the shaft of the utility model from the rear end;

[0021] Figure 6 is a schematic view of the shaft of the utility model from the rear end; Figure 4A structure of the enlarged schematic view at A;

[0022] Figure 7 It is the axial view schematic diagram of one pivot and two sliding blocks of the utility model.

[0023] Legend:

[0024] 1, bottom mechanism; 2, flaw detection mechanism; 101, bottom plate; 102, handle; 103, round hole; 104, L-shaped plate; 105, sliding groove; 106, sliding block; 107, pivot; 108, annular groove; 109, first connecting ring; 110, second connecting ring; 201, first detection unit; 202, second detection unit; 203, probe; 204, magnetizer; 205, tension spring; 206, buffer pad. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] With reference to Figure 1 and Figure 2 , the utility model provides an embodiment: a wellhead drill pipe magnetic flux leakage detection device, including bottom mechanism 1 and flaw detection mechanism 2, bottom mechanism 1 includes bottom plate 101, two pivots 107, four first connecting rings 109 and four second connecting rings 110, flaw detection mechanism 2 includes two first detection units 201 and two second detection units 202, four second connecting rings 110 are fixedly connected to two first detection units 201 rear end near the outer side middle position by connecting rod and are biased up and down, four first connecting rings 109 are fixedly connected to two second detection units 202 front end near the outer side biased up and down position by connecting rod respectively;

[0027] Specifically, two first detection units 201 in flaw detection mechanism 2 provide good installation position for four second connecting rings 110 in bottom mechanism 1, two second detection units 202 in flaw detection mechanism 2 provide good installation position for four first connecting rings 109 in bottom mechanism 1.

[0028] With reference to Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 7: The two middle positions and the rear end middle position of the bottom plate 101 are fixedly provided with handles 102, and a circular hole 103 is formed in the center of the lower end of the bottom plate 101. The upper end of the bottom plate 101 is fixedly provided with L-shaped plates 104 near the two middle positions, and slide grooves 105 are formed in the inner side positions of the two L-shaped plates 104 near the two middle positions of the upper end of the bottom plate 101 and the lower end of the two L-shaped plates 104. The two L-shaped plates 104 are fixedly connected to the two slide blocks 106 on the same side through the two pivot shafts 107;

[0029] The shaft body of the two pivot shafts 107 is symmetrically provided with four annular grooves 108, and four first connecting rings 109 are rotatably arranged in the upper and lower two annular grooves 108 in the same side of the four annular grooves 108. Four second connecting rings 110 are rotatably arranged in the two annular grooves 108 near the middle of the four annular grooves 108 in the same side.

[0030] Specifically, the bottom plate 101 is well lifted by the three handles 102 and well placed on the wellhead platform, aligned with the drilling center, and fastened and connected by bolts. The circular hole 103 facilitates the good passage of the drill bit and the drill pipe. The two first detection units 201 and the two second detection units 202 are arranged on the center of the upper end of the bottom plate 101 in a two-by-two manner and are movably arranged, forming a complete ring.

[0031] When the drill bit passes from the center of the two first detection units 201 and the two second detection units 202 from top to bottom, the first detection unit 201 and the second detection unit 202 on the same side and the first detection unit 201 and the second detection unit 202 on the opposite side are first spread apart. The two pivot shafts 107 are respectively slid outward in the slide grooves 105 through the slide blocks 106 fixedly arranged at the upper and lower centers, and then the first detection unit 201 on the same side is rotated through the two second connecting rings 110 rotatably arranged on the shaft body of the pivot shaft 107 on the same side, and the second detection unit 202 is rotated through the two first connecting rings 109 rotatably arranged on the shaft body of the pivot shaft 107 on the same side, facilitating the good passage of the drill bit.

[0032] Referring to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The two first detection units 201 are fixedly connected with the two second detection units 202 through the two first connecting rings 109 and the two second connecting rings 110, and the two first detection units 201 and the two second detection units 202 are fixedly connected with the two pull springs 205.

[0033] Specifically, the buffer pad 206 effectively avoids impact damage to the upper end of the four detection units caused by the drill bit, and when the drill bit passes through the circular hole 103, the four detection units are reset under the action of the elastic deformation recovery of the two pull springs 205, and are reattached to each other, and the inner wall is well attached to the drill pipe, wherein the two pivots 107 are respectively reset by sliding the sliding blocks 106 fixedly arranged at the upper and lower centers in the sliding grooves 105 to the inner side.

[0034] Each probe 203 covers an area of ninety degrees, thereby completing three hundred and sixty degree full coverage detection of defects, and in the process of the drill pipe out of the well, the magnetic flux leakage method can be used for detection, specifically, the drill pipe is axially magnetized by using the magnetizer 204, and once the drill pipe has defects such as cracks, holes, wear, corrosion and the like, these defects will cause the magnetic field in the drill pipe to leak to the air, thereby forming a magnetic flux leakage field, and by means of the magnetic field sensor, the magnetic flux leakage field can be picked up, so as to know whether there is a defect in the drill pipe, and since the defect size of the drill pipe is positively correlated with the strength of the magnetic flux leakage field, the defect size can be judged by analyzing the strength of the magnetic flux leakage field, without the need for a special detection site, not only the detection is flexible, but also the automation is easy to realize, the labor intensity can be reduced, the detection process is simplified, and the detection cost is effectively saved.

[0035] Working principle: when the drill bit passes from the center of the two first detection units 201 and the two second detection units 202 from top to bottom, the first detection unit 201 and the second detection unit 202 on the same side and the first detection unit 201 and the second detection unit 202 on the opposite side are first spread apart, wherein the two pivots 107 are respectively slid outward in the sliding grooves 105 by the sliding blocks 106 fixedly arranged at the upper and lower centers, and then the first detection unit 201 on the same side is rotated by the two second connecting rings 110 arranged on the shaft of the pivot 107 on the same side and the second detection unit 202 is rotated by the two first connecting rings 109 arranged on the shaft of the pivot 107 on the same side, so as to facilitate the drill bit to pass through well.

[0036] Second, the cushion 206 effectively avoids the drill bit impact damage to the upper end of the four detection units, when the drill bit through the round hole 103, in the two tension spring 205 restore the elastic deformation of the role, the four detection units reset, re two two adhesion, its inner wall good adhesion drill pipe, wherein, two pivot 107 through the upper and lower end of the center fixed block 106 in the sliding slot 105 to the inner side sliding reset, each probe 203 coverage area for ninety degrees, so as to complete the three hundred and sixty degrees full coverage detection of defects.

[0037] Finally, it should be noted that: the above only for the preferred embodiments of the present application have, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A wellhead drill pipe magnetic flux leakage detection device, comprising a bottom mechanism (1) and a flaw detection mechanism (2), characterized in that: The bottom mechanism (1) includes a base plate (101), two pivots (107), four first connecting rings (109) and four second connecting rings (110). The flaw detection mechanism (2) includes two first detection units (201) and two second detection units (202). The four second connecting rings (110) are respectively fixedly connected to the rear end of the two first detection units (201) near the upper and lower outer middle positions by connecting rods. The four first connecting rings (109) are respectively fixedly connected to the front end of the two second detection units (202) near the upper and lower outer positions by connecting rods.

2. The wellhead drill pipe magnetic flux leakage detection device according to claim 1, characterized in that: Handles (102) are fixedly installed at the middle positions on both sides and at the middle position at the rear end of the base plate (101), and a round hole (103) is opened at the center of the lower end of the base plate (101).

3. The wellhead drill pipe magnetic flux leakage detection device according to claim 1, characterized in that: L-shaped plates (104) are fixedly installed on the upper end of the base plate (101) near the middle of both sides. Slide grooves (105) are opened on the lower end of the two L-shaped plates (104) and on the upper end of the base plate (101) near the middle of both sides, located inside the two L-shaped plates (104). Sliding blocks (106) are slidably installed inside the two slide grooves (105). The two ends of the two pivots (107) are respectively fixedly connected between the two sliding blocks (106) on the same side.

4. The wellhead drill pipe magnetic flux leakage detection device according to claim 1, characterized in that: The two pivots (107) have four annular grooves (108) symmetrically arranged on their shafts. The four first connecting rings (109) are respectively rotatably disposed in the upper and lower two annular grooves (108) on the same side. The four second connecting rings (110) are respectively rotatably disposed in the two annular grooves (108) near the middle on the same side.

5. The wellhead drill pipe magnetic flux leakage detection device according to claim 1, characterized in that: A tension spring (205) is fixedly connected between the upper middle rear position of the two first detection units (201) and between the upper middle front position of the two second detection units (202).

6. The wellhead drill pipe magnetic flux leakage detection device according to claim 1, characterized in that: The two first detection units (201) and the two second detection units (202) are identical in size and structure.

7. The wellhead drill pipe magnetic flux leakage detection device according to claim 1, characterized in that: A probe (203) is fixedly installed in the middle position inside each of the two first detection units (201) and the two second detection units (202), and a magnetizer (204) is fixedly installed in the upper and lower middle positions inside each of the two first detection units (201) and the two second detection units (202).

8. The wellhead drill pipe magnetic flux leakage detection device according to claim 1, characterized in that: A buffer pad (206) is fixedly provided at the inner edge of the upper end of each of the two first detection units (201) and the two second detection units (202).

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