Magnetic induction type coupling detection device

Abstract

The utility model discloses a magnetic induction type coupling detection device, and relates to the field of oil and gas exploitation equipment. The utility model provides the magnetic induction type coupling detection device which is beneficial to improving the detection effect. The magnetic induction type coupling detection device comprises a detection device flange, an induction coil body and a coil neck bush. The detection device flange is provided with a through hole, a coil groove and an external connection hole. The induction coil body is annular and comprises an induction coil, a coil connector and a coil soft sleeve, the coil soft sleeve wraps the induction coil, the coil connector is connected with the induction coil and exposed out of the coil soft sleeve, the coil soft sleeve and the induction coil are located in the coil groove, and the coil connector is located in the through hole; the coil neck bush is composed of at least three arc-shaped coil lining plates, the coil neck bush is located in the coil groove and located on the inner side of the induction coil body, the coil neck bush is connected with the detection device flange, the coil lining plates are sealed, and the coil neck bush and the detection device flange are sealed.

Description

Technical Field

[0001] The utility model relates to the field of oil and gas mining equipment, in particular to a magnetic induction type coupling detection device. Background Art

[0002] A coupling is a tool for connecting drilling tools. In the process of mining and detecting surface energy, coupling-connected drill pipes, coupling-connected casings and other coupling-connected components are usually required for drilling operations. During the drilling operation, the operator cannot directly observe the specific position of the coupling from the outside. In order to ensure that the coupling passes through the wellhead safely and avoid accidents at the wellhead and underground operations, a coupling detection device is currently used to detect the position of the coupling. The coupling detection device is also used to detect whether the drill pipe is located in the coupling detection device.

[0003] The magnetic induction coupling detection device is a coupling detection device. Its principle is that the magnetic field generated in the magnetic induction coupling detection device is generated when the coil is energized. The diameter of the coupling part of the drill pipe is larger than that of other parts. The magnetic field strength when the coupling is in the magnetic induction coupling detection device is different from the magnetic field strength when it is not in the coupling detection device. The coupling position can be known by sensing the change in magnetic field strength. Similarly, the magnetic field strength when the drill pipe is in the coupling detection device is different from the magnetic field strength when it is not in the coupling detection device. By sensing the change in magnetic field strength, it can be known whether the drill pipe is in the coupling detection device.

[0004] The Chinese patent with application number 202021486861.2 discloses the specific structure of a magnetic induction coupling detection device. It includes a center tube and a spiral coil, and the spiral coil is installed on the circumferential outside of the center tube. When the coupling detection device is installed and used, it is subjected to a large force. The center tube needs to be a metal tube and the thinnest wall thickness also needs to be large to ensure its strength. This patent puts the spiral coil on the outside of the center tube. Since the center tube is a metal tube and has a thick wall, the center tube has the function of shielding the magnetic field, which makes the magnetic field strength in the coupling detection device significantly attenuated, affecting the detection effect to a certain extent. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a magnetic induction coupling detection device which is beneficial to improving the detection effect.

[0006] The technical solution adopted to solve the above problems is: a magnetic induction coupling detection device includes a detection device flange, an induction coil body and a coil inner sleeve; the detection device flange is provided with a through hole, a coil groove and an external hole, the through hole is arranged along the axial direction of the detection device flange, the coil groove is arranged on the hole wall of the through hole, and the external hole extends from the outer surface of the detection device flange to the coil groove; the induction coil body is in the shape of a ring, the induction coil body includes an induction coil, a coil joint and a coil soft sleeve, the coil soft sleeve wraps the induction coil, the coil joint is connected to the induction coil and exposes the coil soft sleeve, the coil soft sleeve and the induction coil are located in the coil groove, and the coil joint is located in the through hole; the coil inner sleeve is composed of at least three arc-shaped coil inner lining plates, the coil inner sleeve is located in the coil groove and on the inner side of the induction coil body, the coil inner sleeve is connected to the detection device flange, and the coil inner lining plates and the coil inner sleeve and the detection device flange are sealed.

[0007] Furthermore, two sides of the outer portion of the coil inner sleeve are provided with inner sleeve flanges, and the induction coil body is located between the two inner sleeve flanges.

[0008] Furthermore, the magnetic induction coupling detection device includes two inner lining rings, each of which is composed of at least three arc-shaped inner lining ring monomers; inner lining ring grooves are provided on both sides of the outside of the coil inner lining sleeve; the inner lining rings and the inner lining ring grooves are arranged in a one-to-one correspondence, and the inner lining rings include an inner lining ring embedded portion and an inner lining ring exposed portion, the inner lining ring embedded portion is embedded in the inner lining ring groove, and the end face of the inner lining ring exposed portion is flush with the end face of the coil inner lining sleeve; the induction coil body is located between the two inner lining rings.

[0009] Furthermore, the coil lining plate is made of metal, and adjacent coil lining plates and the coil lining plate and the detection device flange are welded.

[0010] Furthermore, the coil inner lining plate is made of metal or non-metal, and epoxy resin sealant is filled between adjacent coil inner lining plates and between the coil inner lining plate and the flange of the detection device.

[0011] Furthermore, the material of the coil soft cover is silicone or epoxy resin soft glue.

[0012] Furthermore, the magnetic induction coupling detection device comprises an external connection structure, which is arranged in the external connection hole and connected to the coil connector.

[0013] Furthermore, the external connection structure includes a wire-passing joint, a wire-passing joint tightening sleeve and a standard socket. The wire-passing joint is inserted into the external connection hole, the coil joint is fixed on the wire-passing joint, the wire-passing joint tightening sleeve is threadedly connected to the external connection hole and tightens the wire-passing joint, and the standard socket is connected to the wire-passing joint tightening sleeve and is electrically connected to the coil joint.

[0014] The beneficial effects of the utility model are as follows: the utility model arranges the induction coil body inside the detection device flange, and the thickness of the detection device flange does not affect the magnetic field inside the detection device flange. The magnetic field strength inside the detection device flange is large, which is conducive to improving the accuracy of the detection of the coupling and the oil pipe position. At the same time, since there is no need to consider the magnetic field shielding problem, the wall thickness of the detection device flange can be larger, which is conducive to ensuring the strength of the magnetic induction coupling detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a magnetic induction coupling detection device;

[0016] Figure 2 is an axial cross-sectional view of a magnetic induction coupling detection device;

[0017] Figure 3 It is an enlarged view of the external structure;

[0018] Figure 4 This is the first type of coil liner structure diagram;

[0019] Figure 5 It is a schematic diagram of producing the induction coil body on the first type of coil inner sleeve;

[0020] Figure 6 This is the second type of coil liner structure diagram;

[0021] Figure 7 yes Figure 6 AA section view;

[0022] Figure 8 It is a schematic diagram of producing an induction coil body on a second type of coil inner sleeve;

[0023] Marked in the figure are: detection device flange 1, through hole 11, coil slot 12, external hole 13, induction coil body 2, induction coil 21, coil soft sleeve 22, coil joint 23, coil inner sleeve 3, coil inner lining plate 31, inner sleeve flange 311, inner lining ring groove 312, external structure 4, wire joint 41, wire joint tightening sleeve 42, standard socket 43, inner lining ring 5, inner lining ring monomer 51, inner lining ring exposed part 511, inner lining ring embedded part 512, manufacturing auxiliary structure 6. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figure 1 and Figure 2As shown, the magnetic induction coupling detection device comprises a detection device flange 1, an induction coil body 2 and a coil inner sleeve 3; the detection device flange 1 is provided with a through hole 11, a coil slot 12 and an external hole 13, the through hole 11 is arranged along the axial direction of the detection device flange 1, the coil slot 12 is arranged on the hole wall of the through hole 11, and the external hole 13 extends from the outer surface of the detection device flange 1 to the coil slot 12; the induction coil body 2 is in the shape of a ring, and the induction coil body 2 comprises an induction coil 21, a coil joint 23 and a coil soft sleeve 22, and the coil soft sleeve 22 wraps the induction coil 21, the coil connector 23 is connected to the induction coil 21 and exposes the coil soft cover 22, the coil soft cover 22 and the induction coil 21 are located in the coil slot 12, and the coil connector 23 is located in the through hole 11; the coil inner sleeve 3 is composed of at least three arc-shaped coil inner lining plates 31, the coil inner sleeve 3 is located in the coil slot 12 and on the inner side of the induction coil body 2, the coil inner sleeve 3 is connected to the detection device flange 1, and the coil inner lining plates 31 and the coil inner sleeve 3 and the detection device flange 1 are sealed.

[0026] The utility model arranges the induction coil body 2 inside the detection device flange 1. The thickness of the detection device flange 1 does not affect the magnetic field inside the detection device flange 1. The magnetic field strength inside the detection device flange 1 is large, which is conducive to improving the accuracy of the detection of the coupling and the oil pipe position. At the same time, since there is no need to consider the magnetic field shielding problem, the wall thickness of the detection device flange 1 can be larger, which is conducive to ensuring the mechanical strength of the magnetic induction coupling detection device.

[0027] Specific as Figure 4 As shown, both sides of the outer side of the coil inner sleeve 3 have inner sleeve flanges 311, and the induction coil body 2 is located between the two inner sleeve flanges 311. The number of the coil inner lining plates 31 is preferably three. The material of the coil soft cover 22 is preferably silicone or epoxy resin soft glue.

[0028] Based on the structure of the coil inner sleeve 3, as Figure 5 As shown, the manufacturing method of the induction coil body 2 of the utility model is as follows: the coil inner sleeve 3 is first manufactured as a whole, and then evenly cut into three coil inner lining plates 31. Then, the three coil inner lining plates 31 are spliced ​​into the coil inner sleeve 3 by using the manufacturing auxiliary structure 6. The manufacturing auxiliary structure 6 may include a core shaft and two outer sleeves, the outer sleeves are sleeved on the core shaft, and the two ends of the coil inner sleeve 3 are located between the outer sleeves and the core shaft, so that the three coil inner lining plates 31 will not separate. Then, the wire is wound on the coil inner sleeve 3. After winding, the silicone or epoxy resin soft glue is filled between the two inner sleeve flanges 311. After the silicone or epoxy resin soft glue solidifies, the coil soft sleeve 22 that wraps the induction coil 21 can be formed. The two wire ends after winding serve as the coil joints 23. Finally, the auxiliary structure 6 is removed and the three coil inner lining plates 31 are removed.

[0029] The overall manufacturing method of the magnetic induction coupling detection device is as follows: the induction coil body 2 is installed into the coil slot 12, and the coil connector 23 enters the through hole 11. Since the induction coil body 2 is soft, it can be installed into the coil slot 12. Then the three coil lining plates 31 are installed into the coil slot 12 to cover the induction coil body 2. Then the three coil lining plates 31 are fixed to the flange 1 of the detection device by welding or filling with epoxy resin sealant and sealed. The three coil lining plates 31 constitute the coil inner sleeve 3. The coil connector 23 is used to connect other electrical components of the magnetic induction coupling detection device, and these electrical components all adopt existing technologies.

[0030] The utility model can also be specifically Figure 6 and Figure 7 As shown, the magnetic induction coupling detection device includes two inner lining rings 5, each inner lining ring 5 is composed of at least three arc-shaped inner lining ring monomers 51; both sides of the outer side of the coil inner lining sleeve 3 are provided with inner lining ring grooves 312; the inner lining ring 5 is arranged one by one with the inner lining ring grooves 312, and the inner lining ring 5 includes an inner lining ring embedded portion 512 and an inner lining ring exposed portion 511, the inner lining ring embedded portion 512 is embedded in the inner lining ring groove 312, and the end surface of the inner lining ring exposed portion 511 is flush with the end surface of the coil inner lining sleeve 3; the induction coil body 2 is located between the two inner lining rings 5. Preferably, each inner lining ring 5 is composed of three arc-shaped inner lining ring monomers 51.

[0031] Based on the structure of the coil inner sleeve 3 and the inner lining ring 5, as shown in FIG. Figure 5 As shown, the manufacturing method of the induction coil body 2 of the utility model is as follows: the coil inner sleeve 3 is first manufactured as a whole, and then evenly cut into three coil inner lining plates 31; the inner lining ring 5 is not cut for the time being. The coil inner lining plate 31 is arranged from the inside to the outside, so that the inner lining ring embedding part 512 is embedded in the inner lining ring groove 312, and then the manufacturing auxiliary structure 6 (only the core shaft) is inserted into the coil inner sleeve 3, and the manufacturing auxiliary structure 6 and the inner lining ring 5 limit the separation of each coil inner lining plate 31. Then the wire is wound on the coil inner sleeve 3. After winding, the silicone or epoxy resin soft glue is filled between the two inner sleeve flanges 311. After the silicone or epoxy resin soft glue solidifies, the coil soft sleeve 22 that wraps the induction coil 21 can be formed. The two wire ends after winding serve as the coil joints 23. Finally, the auxiliary structure 6 is removed, the three coil inner lining plates 31 are removed, and then the induction coil body 2 is removed. After the induction coil body 2 is manufactured, the inner lining ring 5 is evenly cut into three inner lining ring monomers 51.

[0032] The overall manufacturing method of the magnetic induction coupling detection device is as follows: each inner liner ring monomer 51 is first installed into the coil groove 12, and each inner liner ring monomer 51 is respectively fitted with the left and right side walls of the coil groove 12, and each inner liner ring monomer 51 forms two inner liner rings 5. Then the induction coil body 2 is installed into the coil groove 12 and is located between the two inner liner rings 5. Then three coil inner liner plates 31 are installed into the coil groove 12 to cover the induction coil body 2, and the three coil inner liner plates 31 form a coil inner liner 3, and the inner liner ring embedding part 512 is embedded in the inner liner ring groove 312. Then the three coil inner liner plates 31 are fixed to the flange 1 of the detection device by welding or filling with epoxy resin sealant to achieve sealing.

[0033] The coil lining plate 31 of the utility model can be made of metal. Since the coil lining plate 31 is not obviously stressed, its thickness can be thinner, thereby reducing the impact on the magnetic field. At this time, adjacent coil lining plates 31 and the coil lining plates 31 and the detection device flange 1 can be welded. Epoxy resin sealant can also be filled between adjacent coil lining plates 31 and the coil lining plates 31 and the detection device flange 1.

[0034] The coil lining plate 31 of the present invention may also be made of non-metal. In this case, epoxy resin sealant is filled between adjacent coil lining plates 31 and between the coil lining plates 31 and the detection device flange 1 .

[0035] As mentioned above, the coil connector 23 is used to connect other electrical components of the magnetic induction coupling detection device. To facilitate the connection of other electrical components, the magnetic induction coupling detection device preferably includes an external connection structure 4, which is disposed in the external connection hole 13 and connected to the coil connector 23. The external connection structure 4 is used to connect other electrical components.

[0036] The specific structure of the external structure 4 can be as follows Figure 3 As shown, the external connection structure 4 includes a wire connector 41, a wire connector tightening sleeve 42 and a standard socket 43. The wire connector 41 is inserted into the external connection hole 13, and the coil connector 23 is fixed on the wire connector 41. The wire connector tightening sleeve 42 is threadedly connected to the external connection hole 13 and tightens the wire connector 41. The standard socket 43 is connected to the wire connector tightening sleeve 42 and is electrically connected to the coil connector 23.

[0037] The wire connector 41 may specifically include a hard outer shell, and after the coil connector 23 passes through, the hard outer shell is filled with epoxy resin soft glue.

Claims

1. A magnetic induction coupling detection device, characterized in that: The invention comprises a detection device flange (1), an induction coil body (2) and a coil inner sleeve (3); the detection device flange (1) is provided with a through hole (11), a coil groove (12) and an external connection hole (13); the through hole (11) is arranged along the axial direction of the detection device flange (1); the coil groove (12) is arranged on the hole wall of the through hole (11); and the external connection hole (13) extends from the outer surface of the detection device flange (1) to the coil groove (12); the induction coil body (2) is in the shape of a ring; the induction coil body (2) comprises an induction coil (21), a coil joint (23) and a coil soft sleeve (22); the coil soft sleeve (22) wraps the induction coil The invention relates to a detection device (21), wherein the coil connector (23) is connected to the induction coil (21) and exposes the coil soft sleeve (22), the coil soft sleeve (22) and the induction coil (21) are located in the coil slot (12), and the coil connector (23) is located in the through hole (11); the coil inner sleeve (3) is composed of at least three arc-shaped coil inner lining plates (31), the coil inner sleeve (3) is located in the coil slot (12) and on the inner side of the induction coil body (2), the coil inner sleeve (3) is connected to the detection device flange (1), and the coil inner lining plates (31) and the coil inner sleeve (3) and the detection device flange (1) are sealed.

2. The magnetic induction coupling detection device according to claim 1, characterized in that: Both sides of the outside of the coil inner sleeve (3) are provided with inner sleeve flanges (311), and the induction coil body (2) is located between the two inner sleeve flanges (311).

3. The magnetic induction coupling detection device according to claim 1, characterized in that: The invention comprises two inner lining rings (5), each inner lining ring (5) is composed of at least three arc-shaped inner lining ring monomers (51); both sides of the outside of the coil inner lining sleeve (3) are provided with inner lining ring grooves (312); the inner lining rings (5) and the inner lining ring grooves (312) are arranged in a one-to-one correspondence, and the inner lining ring (5) comprises an inner lining ring embedded portion (512) and an inner lining ring exposed portion (511); the inner lining ring embedded portion (512) is embedded in the inner lining ring groove (312), and the end surface of the inner lining ring exposed portion (511) is flush with the end surface of the coil inner lining sleeve (3); and the induction coil body (2) is located between the two inner lining rings (5).

4. The magnetic induction coupling detection device according to claim 1, characterized in that: The coil inner lining plate (31) is made of metal, and adjacent coil inner lining plates (31) as well as the coil inner lining plates (31) and the detection device flange (1) are welded.

5. The magnetic induction coupling detection device according to claim 1, characterized in that: The coil inner lining plate (31) is made of metal or non-metal, and epoxy resin sealant is filled between adjacent coil inner lining plates (31) and between the coil inner lining plates (31) and the detection device flange (1).

6. The magnetic induction coupling detection device according to claim 1, characterized in that: The material of the coil soft cover (22) is silica gel or epoxy resin soft glue.

7. The magnetic induction coupling detection device according to any one of claims 1 to 6, characterized in that: It comprises an external connection structure (4), which is arranged in an external connection hole (13) and connected to a coil connector (23).

8. The magnetic induction coupling detection device according to claim 7, characterized in that: The external connection structure (4) comprises a wire connector (41), a wire connector tightening sleeve (42) and a standard socket (43); the wire connector (41) is inserted into the external connection hole (13); the coil connector (23) is fixed on the wire connector (41); the wire connector tightening sleeve (42) is threadedly connected to the external connection hole (13) and tightens the wire connector (41); the standard socket (43) is connected to the wire connector tightening sleeve (42) and is electrically connected to the coil connector (23).

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