Split type two-interface bonding strength internal magnetic transmission device

Abstract

The utility model discloses a split type two-interface bonding strength internal magnetic transmission device which comprises a pipe column and a well wall, an inner sleeve is arranged on the pipe column, an outer sleeve is arranged on the inner sleeve, a cement sheath is arranged between the outer sleeve and the well wall, a collecting pipe is arranged in the pipe column, a first magnetic ring is rotationally installed on the collecting pipe, and a second magnetic ring is arranged on the well wall. The utility model relates to the technical field of oil drilling, according to the design, the flow velocity of the collected cement mortar is transmitted into the collecting pipe through the magnetic ring, and then the principle that the coil cuts the magnetic induction line to generate induction current is utilized, so that the flow velocity of the cement mortar is increased, and the flow velocity of the cement mortar is increased. The flow velocity of the cement mortar is converted into an electric signal to be transmitted back to a well, the electric signal is used for judging the cementing strength of two interfaces, the collecting pipe is of a totally-closed structure, the cement mortar is prevented from entering the detection device to affect the accuracy of collected data, and the safety of well cementation operation can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to a split type two-interface bonding strength internal magnetic transmission device. Background Art

[0002] For cementing operations in petroleum engineering, the interface environment is more complex, with more influencing factors, and the interface bonding strength has a greater impact on the quality of the project. It is an indisputable fact that the quality and strength of the double interface bonding strength of cementing directly affect the service life and development benefits of the oil well, especially in the adjustment blocks in the later stage of development, the strata are subdivided, the producing layers are thin, and the interlayers are thin. Usually, production can only be carried out after taking measures to increase production. The bonding quality of the cementing interface is required to be higher. At present, during cementing operations, the pressure when injecting cement mortar into the cement ring is relatively high, which can easily damage the sealing structure of the detection device. The cement mortar enters the detection device and affects the accuracy of the detection data, which can easily cause serious harm.

[0003] For example, the utility model patent with the publication number CN206292147U discloses a device for measuring the bonding strength of cement rings for cementing oil and gas wells, including a shell and a core tube, wherein the core tube is located inside the shell, a cement ring is arranged between the core tube and the shell, a pressure block is arranged on the cement ring, and a support seat is arranged below the shell. The support seat is an inner support seat or an outer support seat. When the device is in cementing operation, the pressure when cement mortar is injected into the cement ring is relatively high, which is easy to damage the sealing structure of the detection device. The cement mortar entering the detection device affects the accuracy of the detection data, and thus easily causes serious harm. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a split two-interface bonding strength internal magnetic transmission device, which solves the problem that during cementing operations, the pressure of the existing cementing device when injecting cement mortar into the cement ring is relatively high, which easily causes damage to the sealing structure of the detection device, and the cement mortar enters the detection device, affecting the accuracy of the detection data, which in turn easily causes serious harm.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a split type two-interface bonding strength internal magnetic transmission device, including a pipe string and a well wall, an inner casing is arranged on the pipe string, an outer casing is arranged on the inner casing, a cement ring is arranged between the outer casing and the well wall, a collection pipe is arranged in the pipe string, a first magnetic ring is rotatably installed on the collection pipe, a plurality of first magnets are arranged in the first magnetic ring, a plurality of guide rings are arranged on the first magnetic ring, and a plurality of guide plates are arranged in the guide ring.

[0006] Preferably, a protective ring is provided on the guide ring, a plurality of support blocks are provided inside the protective ring, and auxiliary wheels are respectively provided on the plurality of support blocks.

[0007] Preferably, a third magnetic ring is rotatably arranged in the collection tube, a plurality of third magnets are arranged in the third magnetic ring, a coupling is arranged on the third magnetic ring, a coil is arranged at one end of the coupling, a second magnetic ring is arranged in the collection tube, and the coil is rotatably installed in the second magnetic ring.

[0008] Preferably, a plurality of magnetic disks are arranged in the collection tube, a second magnet is arranged in each of the plurality of magnetic disks, and a plurality of the magnetic disks are movably arranged on the third magnetic ring.

[0009] Preferably, a current signal collector is connected to the coil.

[0010] Beneficial Effects

[0011] The utility model provides a split type two-interface bonding strength internal magnetic transmission device, which has the following

[0012] Beneficial effects:

[0013] The pipe column of the present design is provided with an inner casing, an outer casing is provided on the inner casing, a cement ring is provided between the outer casing and the well wall, a collection pipe is provided in the pipe column, a first magnetic ring is rotatably installed on the collection pipe, a plurality of first magnets are provided in the first magnetic ring, a plurality of guide rings are provided on the first magnetic ring, a plurality of guide plates are provided in the guide ring, and the device can judge the amount of cement filled in the two interfaces by detecting the flow rate of cement mortar, thereby ensuring the bonding strength of the two interfaces.

[0014] The collection tube of the present invention is provided with a third magnetic ring for rotation, a plurality of third magnets are provided in the third magnetic ring, a coupling is provided on the third magnetic ring, a coil is provided at one end of the coupling, a second magnetic ring is provided in the collection tube, and the coil is rotatably installed in the second magnetic ring. The device transmits the flow rate of the collected cement mortar to the collection tube through the magnetic ring, and then utilizes the principle of generating induced current by cutting magnetic flux lines by the coil to convert the flow rate of the cement mortar into an electrical signal and transmit it back to the well for judging the bonding strength of the two interfaces. The collection tube adopts a fully enclosed structure to prevent cement mortar from entering the detection device and affecting the accuracy of the collected data, thereby improving the safety of cementing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the whole of the utility model.

[0016] Figure 2 It is a schematic diagram of the third magnetic ring of the present utility model.

[0017] In the figure: 1, well wall; 2, outer casing; 3, pipe string; 4, inner casing; 5, first magnetic ring; 6, collection tube; 7, guide plate; 8, first magnet; 9, second magnetic ring; 10, second magnet; 11, magnetic disk; 12, third magnetic ring; 13, coupling; 14, third magnet; 15, coil; 16, current signal collector; 17, protective ring; 18, auxiliary wheel; 19, support block; 20, cement ring; 21, guide ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-2 The utility model provides a technical solution: a split type two-interface cementation strength internal magnetic transmission device, comprising a pipe column 3 and a well wall 1, an inner casing 4 is arranged on the pipe column 3, an outer casing 2 is arranged on the inner casing 4, a cement ring 20 is arranged between the outer casing 2 and the well wall 1, a collection pipe 6 is arranged in the pipe column 3, a first magnetic ring 5 is rotatably installed on the collection pipe 6, a plurality of first magnets 8 are arranged in the first magnetic ring 5, a plurality of guide rings 21 are arranged on the first magnetic ring 5, and a plurality of guide plates 7 are arranged in the guide ring 21;

[0020] The collection tube 6 is made of non-magnetic material, and the first magnetic ring 5 has no contact with the magnetic disk 11, which prevents cement mortar from entering the collection tube 6 and affecting the accuracy of the collected data, thereby improving the safety of cementing operations;

[0021] During cementing operation, cement mortar is injected into the pipe column 3. The guide plate 7 is an inclined pressure-resistant plate. When the cement mortar flows through the guide ring 21, the guide plate 7 rotates, driving the first magnetic ring 5 to rotate, and then the first magnet 8 moves.

[0022] This embodiment is further configured such that a protective ring 17 is provided on the guide ring 21, a plurality of support blocks 19 are provided inside the protective ring 17, and auxiliary wheels 18 are respectively provided on the plurality of support blocks 19;

[0023] When the guide ring 21 rotates, the protection ring 17 is controlled to rotate, thereby making the auxiliary wheel 18 move on the inner wall of the pipe column 3, preventing the guide plate 7 from directly contacting the inner wall of the pipe column 3 and wearing the guide plate 7, thereby increasing the service life of the detection device.

[0024] This embodiment is further configured such that a third magnetic ring 12 is rotatably disposed in the collection tube 6, a plurality of third magnets 14 are disposed in the third magnetic ring 12, a coupling 13 is disposed on the third magnetic ring 12, a coil 15 is disposed at one end of the coupling 13, a second magnetic ring 9 is disposed in the collection tube 6, and the coil 15 is rotatably installed in the second magnetic ring 9;

[0025] When the magnetic disk 11 rotates, the second magnet 10 moves, alternately attracting and repelling the third magnet 14 on the third magnetic ring 12, so that the third magnetic ring 12 rotates, and then drives the coupling 13 to rotate, so that the coil 15 rotates. When the coil 15 rotates, it cuts the magnetic flux lines of the second magnetic ring 9, and the electrons in the coil 15 are affected by the Lorentz force. The Lorentz force is a non-electrostatic force that can cause a potential difference and generate an induced current.

[0026] This embodiment is further configured such that a plurality of magnetic disks 11 are disposed in the collection tube 6, a plurality of the magnetic disks 11 are respectively provided with second magnets 10, and a plurality of the magnetic disks 11 are movably disposed on the third magnetic ring 12;

[0027] The first magnet 8 moves, alternately attracting and repelling the second magnet 10 on the magnetic disk 11 , causing the magnetic disk 11 to rotate around the first magnetic ring 5 .

[0028] This embodiment is further configured such that the coil 15 is connected to a current signal collector 16;

[0029] The current signal collector 16 is used to collect the induced current generated by the coil 15 cutting the magnetic flux lines and transmit the data to the well. It belongs to the existing mature technology. Its collection and transmission methods belong to the common technical knowledge, so its structure is not described in detail.

[0030] Embodiment: During cementing operation, cement mortar is injected into the pipe column 3, and the guide plate 7 is an inclined pressure-resistant plate. When the cement mortar flows through the guide ring 21, the guide plate 7 rotates, driving the first magnetic ring 5 to rotate, thereby moving the first magnet 8. When the guide ring 21 rotates, the protection ring 17 is controlled to rotate, thereby moving the auxiliary wheel 18 on the inner wall of the pipe column 3 to prevent the guide plate 7 from directly contacting the inner wall of the pipe column 3 and wearing the guide plate 7, thereby increasing the service life of the detection device. The first magnet 8 moves, alternately attracting and repelling the second magnet 10 on the magnetic disk 11, so that the magnetic disk 11 rotates around the first magnetic ring 5. When the magnetic disk 11 rotates, the second magnet 10 moves, alternately attracting and repelling the third magnet 14 on the third magnetic ring 12, so that the third magnetic ring 12 rotates, thereby driving the coupling 13 to rotate, so that the coil 15 rotates. When the coil 15 rotates, the magnetic flux lines of the second magnetic ring 9 are cut. The electrons in the coil 15 are subjected to the Lorentz force, which is a non-electrostatic force and can cause an electric potential difference and generate an induced current. The current signal collector 16 is used to collect the induced current generated by the coil 15 cutting the magnetic flux lines and transmit the data to the well. When there is a gap between the cement ring 20 and the well wall 1, the cement mortar is subject to less resistance, the flow rate of the cement mortar flow increases, the guide plate 7 rotates faster, and then the rotation speed of the coil 15 increases, the induced current changes, when there is no gap between the cement ring 20 and the well wall 1, the cement mortar is subject to increased resistance, the flow rate of the cement mortar flow decreases, the rotation speed of the guide plate 7 slows down, and then the rotation speed of the coil 15 decreases, the induced current changes, and the staff judges the filling effect of the cement mortar between the cement ring 20 and the well wall 1 according to the flow rate of the cement mortar, and then determines the bonding strength between the cement ring 20 and the well wall 1.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A split type two-interface bonding strength internal magnetic transmission device, comprising a pipe column (3) and a well wall (1), characterized in that: An inner casing (4) is arranged on the pipe column (3), an outer casing (2) is arranged on the inner casing (4), a cement ring (20) is arranged between the outer casing (2) and the well wall (1), a collection pipe (6) is arranged in the pipe column (3), a first magnetic ring (5) is rotatably mounted on the collection pipe (6), a plurality of first magnets (8) are arranged in the first magnetic ring (5), a plurality of guide rings (21) are arranged on the first magnetic ring (5), and a plurality of guide plates (7) are arranged in the guide ring (21).

2. A split type two-interface bonding strength internal magnetic transmission device according to claim 1, characterized in that: The guide ring (21) is provided with a protective ring (17), a plurality of support blocks (19) are provided inside the protective ring (17), and auxiliary wheels (18) are respectively provided on the plurality of support blocks (19).

3. A split type two-interface bonding strength internal magnetic transmission device according to claim 2, characterized in that: A third magnetic ring (12) is rotatably arranged in the collection tube (6), a plurality of third magnets (14) are arranged in the third magnetic ring (12), a coupling (13) is arranged on the third magnetic ring (12), a coil (15) is arranged at one end of the coupling (13), a second magnetic ring (9) is arranged in the collection tube (6), and the coil (15) is rotatably installed in the second magnetic ring (9).

4. A split type two-interface bonding strength internal magnetic transmission device according to claim 3, characterized in that: A plurality of magnetic disks (11) are arranged in the collection tube (6), a second magnet (10) is arranged in each of the plurality of magnetic disks (11), and a plurality of magnetic disks (11) are movably arranged on the third magnetic ring (12).

5. A split type two-interface bonding strength internal magnetic transmission device according to claim 4, characterized in that: The coil (15) is connected to a current signal collector (16).

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