Deep sea centralizer adopting wear-resistant alloy structure

Abstract

The invention relates to the technical field of centralizer alloy structures, and discloses a deep sea centralizer adopting a wear-resistant alloy structure, the alloy structural steel comprises the following components by mass percent: 0.18%-0.25% of C, 1.20%-1.60% of Si, 2.00%-2.50% of Mn, 0.02%-0.06% of V, 0.08%-0.15% of Ti, B, P, S, Cu, RE and the balance of Fe and impurities, and the mass percent of each element is less than or equal to 0.012%, less than or equal to 0.003%, 0.30%-0.50% and 0.06%-0.12%. The invention has the following advantages and effects: high silicon-manganese content improves the corrosion resistance and wear resistance of the alloy material, the addition of V, Ti and B enhances the strength and toughness of the material, at the same time further purifies molten steel and improves the corrosion resistance, P and S reduce the brittleness and corrosion risk brought by impurities, the wear resistance is improved while the weight is reduced, and the service life of the alloy material is prolonged. Therefore, the alloy can be used for underground operation with complex corrosivity and frequent contact friction.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of centralizer alloy structure, in particular to a deep-sea centralizer adopting a wear-resistant alloy structure. BACKGROUND

[0002] The centralizer is an auxiliary device, which mainly functions to keep components in the correct position (such as centering, linear motion, etc.) by means of constraint or support, so as to avoid faults caused by deviation, vibration or uneven force, and is commonly used in oil drilling scenes.

[0003] The alloy structure used in the centralizer is mostly carbon steel, and in the use process, high wear resistance is the key to realizing long-term reliable positioning in harsh environments. From oil drilling to industrial pipelines, if the wear resistance of the alloy material of the centralizer is insufficient, it will directly lead to decreased efficiency, increased cost and even safety hazards.

[0004] In addition, if the wear resistance of the centralizer meets the conditions, the commonly used elastic centralizer needs to be supported with the well wall, and the elastic bow is in frequent contact and friction with the well wall when being lowered into the well and being retracted. Especially in deep-sea oil exploitation, the well wall in the deep sea is significantly more fragile than on land due to soft geology, high pressure and low temperature and complex sea conditions, and the frequent contact of the elastic bow with the well wall is more likely to cause the centralizer to be stuck in the well and affect the stability of the well wall. SUMMARY

[0005] The application aims to provide a deep-sea centralizer adopting a wear-resistant alloy structure, which has the effects of improving the wear resistance of the centralizer and facilitating installation and removal.

[0006] The above technical purpose of the application is achieved by the following technical scheme: a deep-sea centralizer adopting a wear-resistant alloy structure, comprising a cylinder body, the cylinder body is made of wear-resistant alloy structural steel, and the composition of the wear-resistant alloy structural steel comprises, in mass percentage, C: 0.18% to 0.25%, Si: 1.20% to 1.60%, Mn: 2.00% to 2.50%, Al: 0.02% to 0.06%, V: 0.08% to 0.15%, Ti: 0.01% to 0.03%, B: 0.001% to 0.003%, P: ≤0.012%, S: ≤0.003%, Cu: 0.30% to 0.50%, RE: 0.06% to 0.12%, and the balance is Fe and inevitable impurities.

[0007] A cavity is formed in the cylinder body, a heat insulation layer is arranged in the cavity, and a first interface and a second interface coaxial with the cavity are respectively formed in the upper and lower parts of the cavity;

[0008] The centralizer further comprises a fixing cylinder, a sleeve, an arcuate sheet and an automatic control device, the fixing cylinder is coaxially fixed outside the sleeve, the fixing cylinder and the sleeve are rotatably connected with the first interface and the second interface respectively, the arcuate sheet is fixed at both ends of the fixing cylinder and the sleeve, and the automatic control device is arranged in the cavity.

[0009] By adopting the above technical scheme, the arcuate sheet can be automatically folded when the sleeve is submerged and extended into the well, thereby reducing the friction during the lowering into the well.

[0010] Further, the outer wall of the cylinder is provided with a spiral groove, the automatic control device comprises a control assembly connected with the arcuate sheet, a locking assembly for locking the movement state of the control assembly, a heat collecting assembly connected with the bottom of the cylinder and a driving sheet arranged below the control assembly, and a heat conducting sheet is arranged between the heat collecting assembly and the driving sheet.

[0011] By adopting the above technical scheme, the inner cylinder can slide along the axial direction of the sleeve through the guide block, and the circumferential rotation of the inner cylinder is limited.

[0012] Further, the control assembly comprises a bottom disc coaxially attached to the sleeve, a rotating cylinder fixedly connected with the bottom of the bottom disc, an inner cylinder which can move axially along the sleeve, and a cover disc fixedly connected with the rotating cylinder, a coil spring is arranged between the inner cylinder and the rotating cylinder, and the upper surface of the cover disc is connected with the arcuate sheet through a pull wire.

[0013] By adopting the above technical scheme, the inner wall of the wire seat is provided with a reverse L-shaped opening, and the pull wire is first in sliding contact with the opening on the upper surface of the fixing cylinder.

[0014] Further, the outer wall of the rotating cylinder is provided with an annular groove, and the upper surface of the rotating cylinder is fixedly provided with a first protrusion arrayed along the circumferential direction thereof, the locking assembly comprises a support, a spring sheet fixedly connected with the top end of the support, and a second protrusion fixedly arranged on the bottom surface of the support, the support is fixedly connected with the fixing cylinder through a mounting frame, and the bottom end of the spring sheet extends into the annular groove.

[0015] By adopting the above technical scheme, the spring sheet is deformed and generates a restoring force.

[0016] Further, the bottom surface of the cavity is provided with a tooth groove arrayed along the circumferential direction thereof, the heat collecting assembly comprises a synchronous ring slidingly attached to the bottom surface of the cavity and a heat collecting ring slidingly contacting the outer side of the synchronous ring, the bottom surface of the synchronous ring is inserted into the tooth groove through a clamping tooth, and the top surface of the synchronous ring is fixedly connected with the bottom disc through a fixing column.

[0017] By adopting the above technical scheme, the synchronous ring can be rotated through the tooth groove.

[0018] The drive piece comprises a mounting piece, a groove formed on the mounting piece, and a drive frame fixed in the groove.

[0019] By adopting the above technical scheme, the chassis is pushed upward by the drive frame to move upward.

[0020] The drive frame comprises a base fixedly connected to the bottom end of the groove and a shape memory plate fixedly connected to the upper portion of the base.

[0021] By adopting the above technical scheme, the chassis can avoid contacting the shape memory plate when rotating.

[0022] The heat-conducting piece comprises a bottom plate and a heat-conducting plate arranged in an upper-lower interval.

[0023] By adopting the above technical scheme, the heat-conducting plate quickly transmits the temperature on the heat-conducting oil to the mounting piece.

[0024] The present application has the following advantages:

[0025] 1. The high-silicon manganese content improves the corrosion resistance and wear resistance of the alloy material.

[0026] 2. When the sleeve moves downward, the cylinder can contact the fluid in the well through the vortex groove and rotate to drive the control assembly to work.

[0027] 3. When the cylinder rotates, the heat collection assembly can be quickly operated to drive the drive piece to automatically work after operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0029] Figure 1 A structural schematic diagram of a barrel provided by the embodiment of the present application is shown in the figure.

[0030] Figure 2 A structural schematic diagram of a centralizer provided by the embodiment of the present application is shown in the figure.

[0031] Figure 3 A structural schematic diagram of a hollow cavity provided by the embodiment of the present application is shown in the figure.

[0032] Figure 4 A structural schematic diagram of a driving piece and a heat-conducting piece provided by the embodiment of the present application is shown in the figure.

[0033] Figure 5 A structural schematic diagram of a control assembly provided by the embodiment of the present application is shown in the figure.

[0034] Figure 6 A structural schematic diagram of a locking assembly provided by the embodiment of the present application is shown in the figure.

[0035] Figure 7 A structural schematic diagram of a heat collecting assembly provided by the embodiment of the present application is shown in the figure.

[0036] Figure 8 A structural schematic diagram of a clamping tooth provided by the embodiment of the present application is shown in the figure.

[0037] Figure 9 A structural schematic diagram of a driving piece provided by the embodiment of the present application is shown in the figure.

[0038] Figure 10 A structural schematic diagram of an arcuate piece provided by the embodiment of the present application is shown in the figure.

[0039] Figure 11 A structural schematic diagram of an auxiliary assembly provided by the embodiment of the present application is shown in the figure.

[0040] Figure 12 A structural schematic diagram of a battery provided by the embodiment of the present application is shown in the figure.

[0041] In the figure, 1, barrel; 2, fixed barrel; 3, sleeve; 4, arcuate piece; 5, control assembly; 6, locking assembly; 7, heat collecting assembly; 8, driving piece; 9, heat-conducting piece;

[0042] 11, hollow cavity; 12, heat insulation layer; 13, first interface; 14, second interface; 15, embedded ring; 16, volute groove; 17, tooth groove; 18, matching groove;

[0043] 21, charging port; 22, sealing cover plate;

[0044] 31, wire seat; 32, wire slot; 51, bottom disc; 52, rotating cylinder; 53, inner cylinder; 54, cover disc; 55, coil spring; 56, annular groove; 57, first protrusion; 531, guide block; 541, pull wire;

[0045] 61, support; 62, spring sheet; 63, second protrusion; 64, mounting frame;

[0046] 71, synchronous ring; 72, heat collection ring; 73, clamping tooth; 74, fixing column;

[0047] 81, mounting sheet; 82, groove; 83, driving frame; 84, bolt slot; 831, base; 832, shape memory plate;

[0048] 91, bottom plate; 92, heat conduction plate; 93, through slot; 94, heat conduction frame; 95, motor; 96, driving gear; 97, motor frame; 98, battery. DETAILED DESCRIPTION

[0049] The technical solutions of the present application will be clearly and completely described below in combination with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0050] A deep-sea centralizer adopting wear-resistant alloy structure, comprising a cylinder body 1, the cylinder body 1 is made of wear-resistant alloy structural steel, and the composition of the wear-resistant alloy structural steel comprises, in percentage by mass, C: 0.18% to 0.25%, Si: 1.20% to 1.60%, Mn: 2.00% to 2.50%, Al: 0.02% to 0.06%, V: 0.08% to 0.15%, Ti: 0.01% to 0.03%, B: 0.001% to 0.003%, P: ≤0.012%, S: ≤0.003%, Cu: 0.30% to 0.50%, RE: 0.06% to 0.12%, and the balance is Fe and inevitable impurities.

[0051] Low-carbon design improves weldability and low-temperature toughness, compensates for strength loss through micro-alloying, forms a dense SiO2 film through high Si (1.2% to 1.6%), cooperates with Cu / RE to improve H2S / CO2 resistance, and high Mn (2.0% to 2.5%) induces deformation twinning to achieve the property of "the harder the more grinding", low C+high Si / Mn design, the density is reduced by about 3% to 5% compared with traditional casing, and the need for lightweight is achieved.

[0052] The manufacturing process steps of the barrel body 1 can be that after the component composition of the alloy structure is dosed, the dosed material is melted, and after melting, the barrel body 1 is formed by casting.

[0053] A cavity 11 is formed in the barrel body 1, and a heat insulation layer 12 is arranged inside the cavity 11. The type of the heat insulation layer 12 can be an aerogel composite coating, which has good heat insulation effect and can reduce the heat conductivity between the cavity 11 and the outside of the barrel body 1, thereby reducing the excessive transfer of high temperature caused by rotation friction outside the barrel body 1 to the inside of the cavity 11, which is beneficial to the heat concentration of the components in the cavity 11 and the gradual natural cooling of the casing 3 after positioning. The upper and lower parts of the cavity 11 are respectively provided with a first interface 13 and a second interface 14 coaxial with the cavity 11.

[0054] Further, the centralizer further comprises a fixing barrel 2, a casing 3, an arcuate sheet 4 and an automatic control device. The fixing barrel 2 is coaxially fixed with the outside of the casing 3, and the outside of the fixing barrel 2 and the casing 3 are respectively rotatably connected with the first interface 13 and the second interface 14. The first interface 13 and the second interface 14 are fixedly provided with a protruding ring 15, and the outside of the fixing barrel 2 and the casing 3 are respectively provided with a recessed ring structure for the rotation of the ring 15, so that the barrel body 1 can stably rotate outside the fixing barrel 2 and the casing 3.

[0055] The arcuate sheet 4 is fixed at both ends of the fixing barrel 2 and the casing 3, and the body of the arcuate sheet 4 is made of spring steel and has strong elasticity. The automatic control device is arranged in the cavity 11, so that when the barrel body 1 is placed in the well, the arcuate sheet 4 can be automatically folded by the automatic control device, so that after drilling, when the casing 3 is submerged and extended in the well, the arcuate sheet 4 can be automatically folded, reducing the friction when lowering the well, avoiding the casing 3, and automatically expanding when the casing 3 is positioned and cemented, ensuring that the casing 3 is centered. When the arcuate sheet 4 is folded, it can further reduce the mechanical disturbance to the well wall in some easy collapse and easy leakage formations, which is beneficial to the stability of the well.

[0056] A vortex groove 16 is formed on the outer wall of the barrel body 1, so that when the barrel body 1 is lowered with the casing 3, it can contact the drilling fluid through the vortex groove 16 and generate a circumferential rotating force, so that the barrel body 1 rotates on the outside of the casing 3.

[0057] In implementation, the vortex groove 16 utilizes the flow energy of the drilling mud to generate a rotating torque. When the mud flows through the vortex groove 16, the flow direction changes due to the helical angle of the groove, forming a tangential component force to push the barrel body 1 to rotate. The spiral shape of the vortex groove 16 can guide the fluid to form a vortex, generating a centrifugal force. Through the centrifugal force, the barrel body 1 can not only be pushed to rotate, but also the flow of the drilling fluid can be accelerated through the vortex, improving the carrying capacity of impurities such as rock cuttings and silt, and reducing the risk of sticking.

[0058] The automatic control device comprises a control assembly 5 connected with the arc-shaped sheet 4, a locking assembly 6 for locking the movement state of the control assembly 5, a heat collecting assembly 7 connected with the bottom surface of the barrel 1, and a driving sheet 8 arranged below the control assembly 5. When the barrel 1 rotates, the heat collecting assembly 7 can be driven to operate synchronously, so that the heat collecting assembly 7 can collect and absorb the heat generated in the operation process, and the driving sheet 8 can be driven to move when the temperature reaches a threshold. A heat conducting sheet 9 is arranged between the heat collecting assembly 7 and the driving sheet 8.

[0059] Further, the control assembly 5 comprises a bottom disc 51 coaxially attached to the sleeve 3, a rotating cylinder 52 fixedly connected with the bottom disc 51, an inner cylinder 53 axially movable along the sleeve 3, and a cover disc 54 fixedly connected with the rotating cylinder 52. The inner cylinder 53 is provided with a protruding guide block 531 on the inner wall. The sleeve 3 is provided with a linear groove 32 extending along the axial direction of the sleeve 3, so that the inner cylinder 53 can slide along the axial direction of the sleeve 3 through the guide block 531, and the circumferential rotation of the inner cylinder 53 is limited.

[0060] The inner cylinder 53 and the rotating cylinder 52 are provided with a coil spring 55. The coil spring 55 provides a rotating reset force for the rotating cylinder 52 after the rotating cylinder 52 rotates. The cover disc 54 is connected with the arc-shaped sheet 4 through a pull wire 541.

[0061] In the implementation, the sleeve 3 is provided with a wire seat 31 on the outer wall. The wire seat 31 is provided with a reverse L-shaped through hole in the inner wall. The pull wire 541 is first in sliding contact with the opening on the upper surface of the fixed cylinder 2, and then the top end of the pull wire 541 penetrates into the through hole in the inner wall of the wire seat 31 after passing out of the surface of the fixed cylinder 2. The through hole is used as a fulcrum, and then the pull wire 541 is fixed to the outer side of the arc-shaped sheet 4. Therefore, when the pull wire 541 receives a downward pulling force, the arc-shaped sheet 4 will be folded towards the sleeve 3.

[0062] The material of the pull wire 541 can be a steel strand. The bottom part of the pull wire 541 is not in a tight state, but has a reserved length, so that when the barrel 1 rotates to drive the heat collecting assembly 7 to heat up, the reserved length can be wound on the sleeve 3 first.

[0063] As a new implementation, the barrel 1 is provided with an auxiliary assembly for completing the circumferential rotation. The inner wall of the barrel 1 is provided with a plurality of cooperating grooves 18 arranged along the circumferential direction. The auxiliary assembly comprises a motor 95 fixedly arranged on the outer wall of the fixed cylinder 2. The output shaft of the motor 95 is provided with a driving gear 96 which is engaged with the cooperating grooves 18. The outer wall of the motor 95 is fixedly connected with the fixed cylinder 2 through a motor bracket 97. The number of the auxiliary assemblies can be one, two or more than two, and the auxiliary assemblies are installed at the same height.

[0064] The motor 95 is remotely connected with a controller of the drilling platform to remotely control the motor 95 to open and close through the drilling platform. The related technology is currently a mature technology, and can be customized and set by a professional manufacturer during implementation. Therefore, details are not described herein.

[0065] The motor 95 is powered by the battery 98 embedded in the fixed cylinder 2. The upper surface of the fixed cylinder 2 is provided with a charging port 21 electrically connected with the battery 98. The top surface of the charging port 21 is covered with a sealing cover plate 22. The sealing cover plate 22 is bolted to the fixed cylinder 2, and the bottom surface of the sealing cover plate 22 is tightly attached to the upper surface of the fixed cylinder 2. Rubber sheets can be arranged between the two to improve the sealing performance of the charging port 21. During oil extraction, the sealing cover plate 22 can be removed after the bolts are unscrewed, and the battery 98 can be charged through the charging port 21.

[0066] By adopting the above technical scheme, when the centralizer is lowered into the well, the motor 95 is powered to drive the driving gear 96 to rotate, so that the driving gear 96 can apply a pushing force to the matching groove 18, thereby applying a circumferential rotating force to the cylinder body 1. The cylinder body 1 can be stably rotated in the well in cooperation with the vortex groove 16.

[0067] Further, the outer wall of the rotating cylinder 52 is provided with an annular groove 56, and the upper surface of the rotating cylinder 52 is fixedly provided with first protrusions 57 arranged along the circumferential direction thereof. The locking assembly 6 includes a support 61, a spring sheet 62 fixedly connected to the top end of the support 61, and a second protrusion 63 fixedly arranged on the bottom surface of the support 61. The support 61 is fixedly connected to the fixed cylinder 2 through a mounting bracket 64, and the bottom end of the spring sheet 62 extends into the annular groove 56.

[0068] When the rotating cylinder 52 moves upward along the axial direction of the casing 3 under the action of force, the spring sheet 62 can be forced by the annular groove 56, so that the spring sheet 62 deforms and generates a restoring force, and the gap between the first protrusions 57 after upward movement can be inserted with the second protrusion 63. It should be noted that, due to the influence of the rotational reset of the coil spring 55, even if the adjacent gap of the first protrusion 57 is not inserted with the second protrusion 63 after upward movement, the gap will be quickly aligned and inserted with the second protrusion 63 during the gradual upward movement of the rotating cylinder 52, so that the rotating cylinder 52 cannot be reset by the coil spring 55.

[0069] Specifically, the bottom surface of the cavity 11 is provided with tooth grooves 17 arranged along the circumferential direction thereof. The heat collecting assembly 7 includes a synchronous ring 71 slidably attached to the bottom surface of the cavity 11 and a heat collecting ring 72 slidably contacted with the outside of the synchronous ring 71. The materials of the synchronous ring 71 and the heat collecting ring 72 are both copper alloy, which has strong wear resistance and heat conductivity.

[0070] The bottom surface of the synchronous ring 71 is inserted into the tooth groove 17 through the clamping tooth 73, and the top surface of the synchronous ring 71 is fixed to the bottom disc 51 through the fixing column 74, so that when the barrel 1 rotates, the synchronous ring 71 can be driven to rotate through the tooth groove 17, and the synchronous ring 71 and the heat collecting ring 72 are in rotating contact and gradually generate heat.

[0071] When the synchronous ring 71 rotates, the bottom disc 51 can be driven to rotate through the fixing column 74, so that the rotating barrel 52 drives the cover disc 54 to rotate, thereby gradually winding the bottom end of the pull wire 541 outside the sleeve pipe 3, and with the increase of the number of rotations, the top end of the pull wire 541 gradually pulls the arc-shaped sheet 4 to gather.

[0072] In implementation, the height of the fixing column 74 is greater than the normal thickness of the driving sheet 8, the driving sheet 8 includes a mounting sheet 81, a groove 82 provided on the mounting sheet 81, and a driving frame 83 fixed in the groove 82, the inner wall of the mounting sheet 81 is fixed to the sleeve pipe 3, and the groove 82 provides sufficient installation height for the driving frame 83.

[0073] When the temperature on the driving frame 83 reaches a threshold value, the driving frame 83 can push the bottom disc 51 upward to drive the bottom disc 51 to move upward, so that the synchronous ring 71 moves upward and separates from the barrel 1, thereby canceling the rotation of the synchronous ring 71, avoiding the continuous rise of the temperature inside the cavity 11, and moving the rotating barrel 52 to contact the locking assembly 6, so that the rotating barrel 52 can stop rotating, and the pull wire 541 remains in the state of pulling the arc-shaped sheet 4 to gather.

[0074] Specifically, the driving frame 83 includes a base 831 fixedly connected to the bottom end of the groove 82, and a shape memory plate 832 fixed to the upper part of the base 831, the materials of the mounting sheet 81 and the base 831 are high-thermal-conductivity metals, preferably copper, the shape memory plate 832 is parallel to the bottom disc 51 as a whole, and there is an installation gap between the two, so that the bottom disc 51 can avoid contacting the shape memory plate 832 during rotation, thereby reducing the wear of the shape memory plate 832.

[0075] A bolt groove 84 is provided on the surface of the mounting sheet 81, so that a bolt is installed through the bolt groove 84, and the mounting sheet 81 is bolted to the heat-conducting plate 92.

[0076] The shape memory plate 832 is a plate material made of shape memory alloy, which can deform after being heated, and the material is preferably nickel-titanium alloy, which has high structural strength and strong deformation thrust, and the deformation temperature interval is 15°C and above, the response temperature is low, and the response speed is fast, so that after the synchronous ring 71 and the heat collecting ring 72 are in rotating contact and generate heat, the operation temperature can be quickly responded.

[0077] When the deep-sea oil is extracted, the seabed temperature of the deep-sea area (water depth > 1000 meters) is usually close to 0-4℃, and the centralizer of the technical solution is suitable for oil extraction in the deep-sea shallow section (well depth < 1000 meters). When the operation is performed at this depth, the continuously poured drilling fluid and the well temperature are close to the seawater temperature (0-4℃, generally below 10℃) at all times, which can absorb heat and synchronize the temperature of the overall temperature after the rotating movement of the cylinder 1, so that the temperature of the surrounding part is maintained below 10℃. After the cylinder 1 is positioned and stationary, the temperature of the surrounding part will gradually synchronize with the seawater temperature (0-4℃).

[0078] When the centralizer is installed by the drilling platform and lowered into the deep sea, due to the heat insulation effect of the heat insulation layer 12, the temperature inside the cylinder 1 is lower than the room temperature, and during the process of entering the sea, it is in contact with the low-temperature seawater, so that the temperature inside the cylinder 1 gradually decreases to below 15℃, so that the shape memory plate 832 can be kept in the state before deformation, and by setting the heat insulation layer 12, the heat generated by the rotation of the cylinder 1 inside can be slowly dissipated. If the cylinder 1 is still rotating downhole after the shape memory plate 832 is reset, the reset arc-shaped piece 4 is tightened and the above-mentioned mode is repeated in the same way until the centralizer is positioned and stationary, the temperature of the shape memory plate 832 is lowered to drive the arc-shaped piece 4 to reset and contact the well wall to support the centering. In implementation, the heat conduction rate of the heat insulation layer 12 can be controlled by controlling the thickness of the coating. The above-mentioned mode is a commonly used means, and the operation can be realized by customizing from the manufacturer.

[0079] Further, the heat conduction piece 9 includes a bottom plate 91 and a heat conduction plate 92 arranged in an upper and lower interval, and the bottom plate 91 and the heat conduction plate 92 are fixedly attached to the sleeve 3 and the heat collecting ring 72 on the inner and outer sides, respectively. The space formed between the bottom plate 91 and the heat conduction plate 92 is filled with heat conducting oil, so that the heat collecting ring 72 transmits the contact heat of the synchronous ring 71 to the heat conducting oil, and the heat conducting oil uniformly spreads the heat.

[0080] The heat conduction plate 92 is provided with a through groove 93 for inserting a heat conduction frame 94, and the heat conduction plate 92 and the heat conduction frame 94 are made of heat-conducting metal. The top end of the heat conduction frame 94 is fixedly connected with the mounting piece 81, and the bottom surface of the mounting piece 81 is attached to the heat conduction plate 92, so that the heat conduction plate 92 quickly transmits the temperature of the heat conducting oil to the mounting piece 81, thereby heating the shape memory plate 832. Meanwhile, the heat conduction frame 94 is an arc-shaped frame structure, the outer side of which is fixedly attached to the inner wall of the through groove 93, and the top end is fixedly connected with the mounting piece 81, so as to facilitate the heat conduction frame 94 to more simply transmit the heat in the heat conducting oil to the mounting piece 81, thereby improving the heat transfer area and efficiency.

[0081] When the sleeve 3 is positioned, the barrel 1 stops rotating, during which, the synchronous ring 71 gradually and naturally drops inside the cavity 11 after stopping rotating, the shape memory plate 832 gradually deforms after cooling, so that it can gradually reset after the sleeve 3 is stationary, cancel the pushing force on the chassis 51, make the spring sheet 62 push the annular groove 56, make the rotating barrel 52 move down and separate from the second protrusion 63, make the synchronous ring 71 reset, and make the rotating barrel 52 rotate through the coil spring 55, make the pull wire 541 gradually reset, so that the arc-shaped sheet 4 resets to resist the well wall, so that the sleeve 3 is kept centered and cemented, and when the sleeve 3 is removed from the well and resets, the same is true, so that the arc-shaped sheet 4 is conveniently folded when the sleeve 3 is installed, moved and folded, so as to improve the convenience.

[0082] The control mode of the present application is automatically controlled by a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art, the power supply also belongs to the common knowledge in the art, and the present application is mainly used to protect mechanical devices, so the control mode and circuit connection of the present application will not be explained in detail.

[0083] The above description is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A deep-sea centralizer using a wear-resistant alloy structure, comprising a cylinder (1), characterized in that: The cylinder (1) is made of wear-resistant alloy structural steel, and the composition of the wear-resistant alloy structural steel includes, by mass percentage: C:0.18％～0.25％, Si: 1.20%~1.60%, Mn: 2.00%~2.50%, Al:0.02％～0.06％, V:0.08％～0.15％, Ti: 0.01%~0.03%, B:0.001％～0.003％, P:≤0.012％, S:≤0.003％, Cu: 0.30%~0.50%, RE:0.06%~0.12%, The balance is Fe and unavoidable impurities; A cavity (11) is provided in the cylinder (1), a heat insulating layer (12) is provided inside the cavity (11), and a first interface (13) and a second interface (14) coaxial with the cavity (11) are provided in the upper and lower parts respectively; The centralizer further comprises a fixed cylinder (2), a casing (3), a bow-shaped piece (4) and an automatic adjustment control. The fixed cylinder (2) is coaxially fixed to the outer side of the casing (3), and the fixed cylinder (2) and the outer side of the casing (3) are rotatably connected to a first interface (13) and a second interface (14) respectively. Both ends of the bow-shaped piece (4) are fixed to the fixed cylinder (2) and the casing (3). The automatic adjustment control is arranged in the cavity (11) so that when the cylinder (1) is placed in the well, the bow-shaped piece (4) is automatically retracted through the automatic adjustment control.

2. The deep-sea centralizer using a wear-resistant alloy structure according to claim 1, characterized in that: The outer wall of the cylinder (1) is provided with a vortex groove (16), and the automatic adjustment control comprises a control component (5) connected to the bow-shaped plate (4), a locking component (6) for locking the motion state of the control component (5), a heat collection component (7) whose bottom surface is connected to the cylinder (1), and a drive plate (8) arranged below the control component (5), a heat conducting plate (9) is arranged between the heat collection component (7) and the drive plate (8), and an auxiliary component is arranged in the cylinder (1) to assist it in completing circumferential rotation.

3. The deep-sea centralizer using a wear-resistant alloy structure according to claim 2, characterized in that: The control assembly (5) comprises a chassis (51) coaxially fitted with the sleeve (3) on the inner side, a rotary cylinder (52) fixedly connected to the chassis (51) on the bottom, an inner cylinder (53) movable along the axial direction of the sleeve (3), and a cover plate (54) fixed to the rotary cylinder (52) on the outer side, a coil spring (55) being provided between the inner cylinder (53) and the rotary cylinder (52), the upper surface of the cover plate (54) being connected to the bow piece (4) via a pull wire (541), the inner wall of the cylinder (1) being provided with a circumferentially spaced array of mating grooves (18), the auxiliary assembly comprising a motor (95) fixedly provided on the outer wall of the fixed cylinder (2), the output shaft of the motor (95) being fixed with a driving gear 96 meshing with the mating groove (18) on the circumferential side.

4. The deep-sea centralizer using a wear-resistant alloy structure according to claim 3, characterized in that: The outer wall of the rotary cylinder (52) is provided with an annular groove (56), and the upper surface of the rotary cylinder (52) is fixedly provided with a first protrusion (57) arrayed along its circumferential direction. The locking assembly (6) includes a support (61), a spring piece (62) whose top end is fixedly connected to the support (61), and a second protrusion (63) fixedly arranged on the bottom surface of the support (61). The support (61) is fixed to the fixed cylinder (2) through a mounting frame (64), and the bottom end of the spring piece (62) extends into the annular groove (56).

5. The deep-sea centralizer using a wear-resistant alloy structure according to claim 4, characterized in that: The bottom surface of the cavity (11) is provided with tooth grooves (17) arranged in an array along its circumferential direction. The heat collecting assembly (7) comprises a synchronization ring (71) whose bottom surface is in sliding contact with the cavity (11) and a heat collecting ring (72) whose outer side is in sliding contact with the synchronization ring (71). The bottom surface of the synchronization ring (71) is plugged into the tooth grooves (17) via latch teeth (73), and the top surface of the synchronization ring (71) is fixed to the chassis (51) via a fixing column (74).

6. The deep-sea centralizer using a wear-resistant alloy structure according to claim 5, characterized in that: The driving plate (8) comprises a mounting plate (81), a groove (82) provided on the mounting plate (81), and a driving frame (83) fixed in the groove (82).

7. The deep-sea centralizer using a wear-resistant alloy structure according to claim 6, characterized in that: The driving frame (83) comprises a base (831) whose bottom end is fixedly connected to the groove (82) and a shape memory plate (832) fixedly arranged on the upper part of the base (831). The shape memory plate (832) is kept parallel to the chassis (51) as a whole, and there is an installation gap between the two.

8. The deep-sea centralizer using a wear-resistant alloy structure according to claim 7, characterized in that: The heat conducting plate (9) comprises a bottom plate (91) and a heat conducting plate (92) spaced apart from each other. The inner and outer sides of the bottom plate (91) and the heat conducting plate (92) are fixedly fitted to the sleeve (3) and the heat collecting ring (72) respectively. The space formed by the bottom plate (91) and the heat conducting plate (92) is filled with heat conducting oil. A through groove (93) for inserting a heat conducting frame (94) is provided on the surface of the heat conducting plate (92). The top of the heat conducting frame (94) is fixedly connected to the mounting plate (81).

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