Vibration-assisted underground in-situ metal plugging device and technology

Abstract

The invention belongs to the technical field of petroleum underground plugging, and relates to a vibration-assisted underground in-situ metal plugging device and process, and the vibration-assisted underground in-situ metal plugging device comprises a connecting shaft, an electric energy and temperature control part, a heating working area and alloy accommodating area part and a bottom shell release assembly which are sequentially connected from top to bottom; a cable is arranged in the connecting shaft, one end of the cable is electrically connected with a power source located on the ground, the other end of the cable is electrically connected with the electric energy and temperature control component, and the cable is used for providing electric energy for the electric energy and temperature control component. The heating working area and alloy containing area component is filled with plugging alloy, a heating part and a vibrating part are arranged in the heating working area and alloy containing area component, the heating part and the vibrating part are both electrically connected with the electric energy and temperature control component, and the heating part and the vibrating part are used for heating and vibrating the plugging alloy to enable the plugging alloy to be in a molten state; the bottom shell releasing assembly is used for releasing the molten-state blocking alloy. The invention further discloses an in-situ metal blocking technology using the device.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum downhole plugging, and in particular relates to a vibration-assisted downhole in-situ metal plugging device and process. Background Art

[0002] With the extensive development of global oil and gas resources, a large number of oil and gas wells are entering the end of their life cycle. If abandoned oil and gas wells (i.e. abandoned wells) are not properly plugged, they may cause a series of environmental, economic and safety problems. This makes well plugging not only an important operation link in the later stage of oil and gas production, but also a key measure for the global energy industry to fulfill its environmental responsibilities and ensure sustainable development.

[0003] In the current abandoned well plugging operations, cement is the most commonly used material. However, the use of cement in the plugging field has problems such as volume shrinkage, cracking and penetration, mechanical failure, chemical corrosion, and high cost. In view of the defects of traditional cement, the industry is exploring new plugging materials and technologies, such as metal materials. Bismuth alloy has solidification and expansion properties, and its performance is better than that of cement. The plugging length of bismuth alloy is much shorter than that of traditional cement plugs, which reduces construction time and greatly reduces costs. It is generally considered to be a new method for underground plugging.

[0004] At present, Bi-Sn eutectic alloy is mainly used. In order to enhance the expansion blocking effect, the Bi content in the alloy can be increased. However, due to the density of Bi (9.78g / cm 3 ) is higher than Sn (7.28g / cm 3 ), the increase of Bi content will lead to the problem of uneven internal structure of the alloy during solidification, affecting the plugging performance. Therefore, it is urgent to develop a device and process that can make the internal structure of the plugging alloy with high Bi content uniform.

[0005] In addition, thermite is currently used for underground metal plugging heating. The combustion temperature of thermite can reach 2500℃, which may cause damage to the wellbore. Thermite produces oxides or other by-products after reaction, and the residual products may affect the plugging performance. In addition, the production and storage of thermite for plugging also have safety hazards. Therefore, it is urgent to develop a new and safe device and plugging process that can make the plugging tissue uniform. Summary of the invention

[0006] The purpose of the present invention is to provide a vibration-assisted underground in-situ metal plugging device and process to solve the above-mentioned problems.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The vibration-assisted downhole in-situ metal plugging device includes:

[0009] The connecting shaft, the power and temperature control components, the heating working area and alloy containing area components and the bottom shell release assembly are connected in sequence from top to bottom;

[0010] A cable is arranged in the connecting shaft, one end of the cable is electrically connected to a power source located on the ground, and the other end of the cable is electrically connected to the power and temperature control component, and the cable is used to provide power to the power and temperature control component;

[0011] The heating working area and the alloy containing area are filled with a plugging alloy, and a heating part and a vibrating part are arranged in the heating working area and the alloy containing area. The heating part and the vibrating part are both electrically connected to the electric energy and temperature control part, and the heating part and the vibrating part are used to heat and vibrate the plugging alloy to make the plugging alloy in a molten state;

[0012] The bottom shell releasing assembly is used to release the plugging alloy in a molten state.

[0013] Optionally, the power and temperature control components include:

[0014] Housings for electrical and temperature control components;

[0015] A temperature control system is fixedly connected in the housing of the electric energy and temperature control component, the temperature control system is electrically connected to the cable, the temperature control system is electrically connected to the heating part, and the temperature control system is used to control the heating part to heat the plugging alloy to make it molten;

[0016] A vibration generator is fixed in the housing of the power and temperature control component. The vibration generator is electrically connected to the cable and the vibration part. The vibration generator is used to control the vibration part to oscillate the molten sealing alloy.

[0017] Optionally, the heating working area and alloy containing area components include:

[0018] Heating the working area and the alloy containing component housing;

[0019] A restraining component, axially connected in the heating working area and the alloy containing component housing, the restraining component is used to fix the heating part and the vibrating part;

[0020] The sensing part is connected with the heating working area and the alloy containing component shell, and is used for monitoring the temperature of the heating working area and the external working area of ​​the alloy containing component shell and the internal heating area of ​​the heating working area and the alloy containing component shell.

[0021] Optionally, the bottom housing release assembly includes:

[0022] A shell, axially connected to the bottom of the shell of the heating working area and the alloy containing component, and the shell is in communication with the shell of the heating working area and the alloy containing component;

[0023] A low melting point alloy plate is detachably arranged on the side wall of the shell, and after the low melting point alloy plate is melted, the heating working area is connected with the inside and outside of the shell of the alloy containing component;

[0024] The sensing part comprises a housing sensor and a working area sensor. The working area sensor is fixedly connected to the bottom of the housing. The housing sensor is fixedly connected to the heating working area and the outer wall of the housing of the alloy containing component.

[0025] Optionally, the housing is provided with a slot for the low-melting-point alloy plate to slide.

[0026] Optionally, the heating part includes a plurality of heating cables, wherein the heating cables are fixedly connected to the restraining component, the top ends of the heating cables are electrically connected to the temperature control system, and the bottom ends of the heating cables are located in the heating working area and the alloy containing component casing.

[0027] Optionally, the vibration part includes a variable amplitude vibration head, which is fixed to the constraint component, the top end of the variable amplitude vibration head is transmission-connected to the vibration generator, and the bottom end of the variable amplitude vibration head is located in the heating working area and the alloy containing component shell.

[0028] Optionally, the restraining component includes a variable amplitude vibration head hole opened in the middle and a plurality of heating cable restraining holes opened in the circumferential direction, the plurality of heating cable restraining holes are arranged at equal intervals in the circumferential direction, and the number of the heating cable restraining holes matches the number of the heating cables;

[0029] The variable amplitude vibration head is fixed in the variable amplitude vibration head hole.

[0030] Optionally, the plugging alloy is a Bi-Sn alloy material, in which the mass percentage of Sn in the Bi-Sn alloy material is 27%-42%; the mass percentage of Bi metal is 58%-75%.

[0031] An in-situ metal plugging process, using the above-mentioned vibration-assisted downhole in-situ metal plugging device, comprises the following steps:

[0032] Placing a bridge plug in the plugging area and pouring a cement plug on the bridge plug;

[0033] After the cement plug is fixed, the vibration-assisted downhole in-situ metal plugging device is placed;

[0034] The electric energy and temperature control component controls the heating part and the vibration part in the heating working area and alloy containing area to heat and vibrate the plugging alloy filled in the heating working area and alloy containing area to make it molten, and then releases it to the top of the cement plug by the bottom shell release component;

[0035] The in-situ plugging device is removed, and the molten plugging alloy is cooled and solidified to form a metal plugging.

[0036] Compared with the prior art, the present invention has the following advantages and technical effects:

[0037] When in use, a bridge plug is placed in the plugging area and a cement plug is poured on the bridge plug; the device is used to form a metal plug on the cement plug, and the heating part and the vibration part in the heating working area and the alloy containing area are controlled by electric energy and temperature control components to heat and oscillate the plugging alloy filled in the heating working area and the alloy containing area to make it molten, and then released to the top of the cement plug by the bottom shell release component. Compared with the traditional heating using thermite combustion, the device uses electric heating to make temperature control easier, will not cause damage to the wellbore, and will not produce oxides or other by-products to affect the plugging performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0039] Figure 1 It is a cross-sectional view of the structure of the present invention;

[0040] Figure 2 It is a top view of the restraining component structure of the present invention;

[0041] Figure 3 A top view of the bottom shell release assembly structure of the present invention;

[0042] Figure 4 This is a plugging flow chart of the present invention;

[0043] Figures 5 to 9 This is a schematic diagram of the plugging process of the present invention;

[0044] Fig.10 A comparison diagram of the solidification expansion rates of the Bi-Sn alloy provided by the present invention and the existing Sn58Bi alloy;

[0045] Fig.11The electron micrographs of the structures of the Bi-Sn alloy provided by the present invention when vibration is applied and when no vibration is applied during solidification are compared;

[0046] Fig.12 Scanning electron micrographs of structures at different positions of the Bi-Sn alloy provided by the present invention when solidifying without applying vibration;

[0047] Among them, 1. connecting shaft; 2. electric energy and temperature control components; 3. heating working area and alloy containing area components; 4. bottom shell release assembly; 21. temperature control system; 22. vibration generator; 23. housing of electric energy and temperature control components; 31. constraint components; 32. housing of heating working area and alloy containing components; 33. heating cable; 34. variable amplitude vibration head; 35. housing sensor; 36. working area sensor; 311. heating cable constraint hole; 312. variable amplitude vibration head hole; 41. low melting point alloy plate; 42. housing; 51. casing; 61. cement plug; 62. bridge plug. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Reference Figures 1 to 12 The present invention discloses a vibration-assisted downhole in-situ metal plugging device, comprising:

[0051] A connecting shaft 1, an electric energy and temperature control component 2, a heating working area and alloy containing area component 3 and a bottom shell release component 4 are connected in sequence from top to bottom;

[0052] A cable is arranged in the connecting shaft 1, one end of the cable is electrically connected to a power source located on the ground, and the other end of the cable is electrically connected to the power and temperature control component 2, and the cable is used to provide power to the power and temperature control component 2;

[0053] The heating working area and alloy containing area component 3 is filled with a plugging alloy, and a heating part and a vibrating part are provided in the heating working area and alloy containing area component 3, and the heating part and the vibrating part are electrically connected to the electric energy and temperature control component 2, and the heating part and the vibrating part are used to heat and vibrate the plugging alloy to make the plugging alloy in a molten state;

[0054] The bottom shell releasing assembly 4 is used to release the molten plugging alloy.

[0055] When in use, a bridge plug 62 is placed in the plugging area and a cement plug 61 is poured on the bridge plug 62;

[0056] The device is used to form a metal seal on the cement plug 61. The heating part and the vibration part in the heating working area and the alloy containing area part 3 are controlled by the electric energy and temperature control component 2 to heat and oscillate the sealing alloy filled in the heating working area and the alloy containing area part 3 to make it molten, and then released to the top of the cement plug 61 by the bottom shell release component 4. Compared with the traditional heating by thermite combustion, the device uses electric heating to make temperature control easier, without causing damage to the wellbore, and without producing oxides or other by-products that affect the sealing performance.

[0057] As an optional implementation, the electric energy and temperature control component 2 includes:

[0058] Power and temperature control component housing 23;

[0059] The temperature control system 21 is fixed in the housing 23 of the electric energy and temperature control component. The temperature control system 21 is electrically connected to the cable. The temperature control system 21 is electrically connected to the heating part. The temperature control system 21 is used to control the heating part to heat the plugging alloy to make it molten.

[0060] The vibration generator 22 is fixed in the housing 23 of the power and temperature control component. The vibration generator 22 is electrically connected to the cable. The vibration generator 22 is electrically connected to the vibration part. The vibration generator 22 is used to control the vibration part to oscillate the molten sealing alloy.

[0061] The vibration generator 22 may use low-frequency vibration driven by a motor, or ultrasonic vibration driven by a high-frequency oscillation.

[0062] As an optional embodiment, the heating working area and alloy containing area component 3 includes:

[0063] Heating work area and alloy containing component housing 32;

[0064] A restraining component 31 is axially connected between the heating working area and the alloy containing component housing 32, and the restraining component 31 is used to fix the heating part and the vibrating part;

[0065] The sensing part is connected to the heating working area and the alloy containing component shell 32, and is used to monitor the temperature of the heating working area and the external working area of ​​the alloy containing component shell 32 and the internal heating area of ​​the heating working area and the alloy containing component shell 32.

[0066] As an optional embodiment, the bottom shell release assembly 4 includes:

[0067] The housing 42 is axially connected to the bottom of the heating working area and the alloy containing component housing 32, and the housing 42 is in communication with the heating working area and the alloy containing component housing 32;

[0068] The low melting point alloy plate 41 is detachably mounted on the side wall of the housing 42. After the low melting point alloy plate 41 is melted, the heating working area is connected to the inside and outside of the alloy containing component housing 32;

[0069] The sensing part includes a housing sensor 35 and a working area sensor 36 . The working area sensor 36 is fixedly connected to the bottom of the housing 42 . The housing sensor 35 is fixedly connected to the heating working area and the outer wall of the alloy containing component housing 32 .

[0070] The low melting point alloy plate 41 is a sealing alloy plate material selected from the melting point of the alloy placed in the heating working area and the alloy containing area component 3.

[0071] As an optional implementation, the housing 42 is provided with a slot for the low-melting-point alloy plate 41 to slide.

[0072] As an optional embodiment, the heating part includes a plurality of heating cables 33, the heating cables 33 are fixedly connected to the restraining component 31, the top ends of the heating cables 33 are electrically connected to the temperature control system 21, and the bottom ends of the heating cables 33 are located in the heating working area and the alloy containing component shell 32.

[0073] As an optional embodiment, the vibration part includes a variable amplitude vibration head 34, the variable amplitude vibration head 34 is fixedly connected to the constraint component 31, the top end of the variable amplitude vibration head 34 is transmission connected to the vibration generator 22, and the bottom end of the variable amplitude vibration head 34 is located in the heating working area and the alloy containing component shell 32.

[0074] As an optional embodiment, the restraining component 31 includes a variable amplitude vibration head hole 312 opened in the middle and a plurality of heating cable restraining holes 311 opened in the circumferential direction. The plurality of heating cable restraining holes 311 are arranged at equal intervals in the circumferential direction, and the number of the heating cable restraining holes 311 matches the number of the heating cables 33.

[0075] The variable amplitude vibration head 34 is fixed in the variable amplitude vibration head hole 312 .

[0076] The vibration-assisted downhole alloy melting tool provided in an embodiment of the present invention includes a connecting shaft 1, an electric energy and temperature control component 2, a heating working area and alloy containing area component 3 and a bottom shell release assembly 4. A cable for transmitting electric energy is arranged inside the connecting shaft 1. The connecting shaft 1 is fixed to the outer shell of the electric energy and temperature control component 2 by welding, and the cable is electrically connected to the electric energy and temperature control component 2.

[0077] The cable and the electric energy and temperature control component 2 include a temperature control system 21, a vibration generator 22 and an electric energy and temperature control component housing 23. A thread is provided at the bottom end of the inner part of the electric energy and temperature control component housing 23 to connect with the vibration generator 22. The vibration generator 22 and the temperature control system 21 are electrically connected, so that the temperature control system 21 can control the operation of the vibration generator 22.

[0078] The heating working area and alloy containing area component 3 includes a heating cable restraining component 31 , a heating working area and alloy containing component housing 32 , a heating cable 33 , a variable amplitude vibration head 34 , a housing sensor 35 and a working area sensor 36 .

[0079] The heating cable restraint component 31 is fixed to the heating working area and the inside of the alloy containing component shell 32 by welding. The heating cable restraint component 31 is provided with four heating cable restraint holes 311 arranged at equal intervals in the circumference and a variable amplitude vibration head hole 312 located in the center. The four heating cable restraint holes 311 are used to limit and restrain the four heating cables 33. The variable amplitude vibration head 34 is controlled by the vibration generator 22 and is arranged below the vibration generator 22. The variable amplitude vibration head 34 passes through the variable amplitude vibration head hole 312. The shell sensor 35 is arranged outside the heating working area and the alloy containing component shell 32 to transmit signals to the temperature control system 21.

[0080] The bottom shell release assembly 4 is connected to the heating working area and the alloy containing component shell 32 by welding. The bottom shell release assembly 4 includes a low melting point alloy plate 41 and a shell 42. The low melting point alloy plate 41 is fixed to the bottom of the bottom shell 42 by insertion.

[0081] As an optional implementation, the plugging alloy is a Bi-Sn alloy material, in which the mass percentage of Sn in the Bi-Sn alloy material is 27%-42%; the mass percentage of Bi metal is 58%-75%.

[0082] The plugging alloy is a Bi-Sn alloy material, and the characteristics of the alloy are: Sn accounts for 30% by mass; Bi metal accounts for 70% by mass.

[0083] like Figure 6 As shown, the solidification expansion rate of Bi-Sn alloy material is increased by 55% compared with Sn58Bi.

[0084] An in-situ metal plugging process, using the above-mentioned vibration-assisted downhole in-situ metal plugging device, comprises the following steps:

[0085] Placing a bridge plug 62 in the plugging area and pouring a cement plug 61 on the bridge plug 62;

[0086] After the cement plug 61 is fixed, the vibration-assisted downhole in-situ metal plugging device is placed;

[0087] The plugging alloy filled in the heating working area and alloy containing area component 3 is heated and oscillated by the electric energy and temperature control component 2 to be in a molten state, and then released by the bottom shell release component 4 to the top of the cement plug 61;

[0088] Remove the in-situ plugging device and wait for the molten plugging alloy to cool and solidify to form a metal plug.

[0089] The steps of this construction process include:

[0090] S1, placing a bridge plug 62 in the plugging area and injecting cement;

[0091] S2. Assemble the vibration-assisted downhole alloy melting tool, and after the squeezed cement is solidified to form the cement plug 61, place the downhole plugging Bi-Sn alloy material in the heating working area and the alloy containing component shell 32, connect the device to the connecting shaft 1 through a steel cable, hoist and transport it to the squeezed cement plug 61, and connect the ground power to the internal cable of the connecting shaft 1 through the cable;

[0092] S3. Start the ground power supply system, transmit electric energy to the underground through the cable to start the temperature control system 21. The temperature control system 21 starts to transmit current to the heating cable 33. The heating cable 33 includes a heat-resistant shell and an electric heating wire. The current is transmitted to the electric heating wire, which produces a current thermal effect. A large amount of heat is generated at the heating cable 33 to melt the Bi-Sn alloy material in the heating working area and the alloy containing component shell 32.

[0093] S4. After the downhole plugging Bi-Sn alloy is heated to a certain temperature, the working area sensor 36 receives the temperature signal and transmits an electrical signal to the temperature control system 21. After the temperature control system 21 receives a certain temperature greater than the melting point of the downhole plugging Bi-Sn alloy material, it controls the vibration generator 22 to start, and the vibration generator 22 controls the variable amplitude vibration head 34 to vibrate.

[0094] S5. When the downhole plugging Bi—Sn alloy melt is completely melted and the temperature rises to the temperature of the low melting point alloy plate 41, the low melting point alloy plate 41 melts, and the downhole plugging Bi—Sn alloy melt flows out of the heating working area and the alloy containing component shell 32.

[0095] S6. The temperature of the Bi-Sn alloy melt is detected by the housing sensor 35 for a period of time. The temperature control system 21 continues to heat the Bi-Sn alloy. The temperature control system 21 controls the vibration generator 22 to stop applying vibration, and the device is taken out to wait for the Bi-Sn alloy to solidify.

[0096] The vibration-assisted downhole melting alloy tool provided in the embodiment of the present invention is applied to wellbore plugging operations. Before the tool is lowered, a bridge plug 62 is arranged at the plugging position, and then 10-20 m of cement is squeezed and injected to form a cement plug 61 after solidification.

[0097] Assemble the vibration-assisted downhole alloy melting tool, place the downhole plugging Bi-Sn alloy material in the heating working area and the alloy containing component shell 32, connect the vibration-assisted downhole alloy melting tool to the connecting shaft 1 through a steel cable, lift and transport it to the squeezed cement plug 61, and connect the ground power to the internal cable of the connecting shaft 1 through the cable.

[0098] The ground power supply system is started, and electric energy is transmitted to the underground through the cable to start the temperature control system 21. The temperature control system 21 is started to transmit current to the heating cable 33 to melt the sealing alloy material stored in the heating working area and the alloy containing component shell 32.

[0099] After the temperature of the alloy melt reaches 200°C, the vibration generator 22 is started, and the temperature control system 21 controls the temperature to remain at this temperature. At the same time, the vibration generator 22 is started to drive the variable amplitude vibration head 34 to vibrate. In this embodiment, a vibration generator 22 with a frequency of 20kHZ is used to drive the variable amplitude vibration head 34 of the titanium alloy to input vibration for 5 minutes. At this temperature, the low melting point alloy plate 41 melts, and the vibration-assisted downhole alloy melting tool and the casing 51 form a connecting vessel. The melt fills the pores of the cement plug under the action of vibration.

[0100] Remove the heating device in the melt state, wait until the tool is completely out of the melt, and stop heating and vibration.

[0101] Combination Fig.11 and Fig.12 As shown, when no vibration is applied, Fig.12 Region a and region b show obvious differences in organization, indicating that uneven distribution of elements and organization will occur in the alloy plug when no vibration is applied. Fig.11 It shows that the vibrated and solidified tissue is refined and its homogeneity is greatly improved.

[0102] Compared with the traditional technology, the present invention has the following advantages:

[0103] 1. Use hypereutectic Bi-Sn with a higher melting point than Bi-Sn eutectic alloy

[0104] The alloy has a higher melting point and a higher service temperature underground than the Bi-Sn eutectic alloy. At the same time, due to the larger solidification expansion rate of the alloy, it has better sealing properties.

[0105] 2. The heating area and the alloy storage area are integrated in one area, which reduces the volume and weight of the tool. After melting by the electric heating device, the tool heating area and the casing are connected by melting the low-melting-point alloy plate. Compared with the integrated cast Bi-Sn alloy shell used abroad, it has lower cost and simpler processing.

[0106] 3. Use vibration-assisted means to promote the homogenization of alloy plug elements, improve the ability to seal the melt filling cement plug gaps, and improve sealing performance.

[0107] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0108] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A vibration-assisted downhole in-situ metal plugging device, characterized in that: include: A connecting shaft (1), an electric energy and temperature control component (2), a heating working area and alloy containing area component (3) and a bottom shell release component (4) are sequentially connected from top to bottom; A cable is arranged in the connecting shaft (1), one end of the cable is electrically connected to a power source located on the ground, and the other end of the cable is electrically connected to the power and temperature control component (2), and the cable is used to provide power to the power and temperature control component (2); The heating working area and alloy containing area component (3) is filled with a plugging alloy, and a heating part and a vibrating part are provided in the heating working area and alloy containing area component (3), and the heating part and the vibrating part are both electrically connected to the electric energy and temperature control component (2), and the heating part and the vibrating part are used to heat and vibrate the plugging alloy so that the plugging alloy is in a molten state; The bottom shell releasing component (4) is used to release the plugging alloy in a molten state.

2. The vibration-assisted downhole in-situ metal plugging device according to claim 1, characterized in that: The electric energy and temperature control component (2) comprises: Power and temperature control component housing (23); A temperature control system (21) is fixedly connected to the housing (23) of the electric energy and temperature control component, the temperature control system (21) is electrically connected to the cable, the temperature control system (21) is electrically connected to the heating part, and the temperature control system (21) is used to control the heating part to heat the plugging alloy to make it molten; A vibration generator (22) is fixedly connected in the housing (23) of the electric energy and temperature control component. The vibration generator (22) is electrically connected to the cable. The vibration generator (22) is electrically connected to the vibration part. The vibration generator (22) is used to control the vibration part to oscillate the molten sealing alloy.

3. The vibration-assisted downhole in-situ metal plugging device according to claim 2 is characterized in that: The heating working area and alloy containing area component (3) comprises: A heating working area and an alloy containing component housing (32); A restraining component (31) is axially connected to the heating working area and the alloy containing component housing (32), and the restraining component (31) is used to fix the heating part and the vibrating part; The sensor part is connected to the heating working area and the alloy containing component shell (32) and is used to monitor the temperature of the external working area of ​​the heating working area and the alloy containing component shell (32) and the internal heating area of ​​the heating working area and the alloy containing component shell (32).

4. The vibration-assisted downhole in-situ metal plugging device according to claim 3 is characterized in that: The bottom housing release assembly (4) comprises: A shell (42) is axially connected to the bottom of the heating working area and the alloy containing component shell (32), and the shell (42) is in communication with the heating working area and the alloy containing component shell (32); A low melting point alloy plate (41) is detachably arranged on the side wall of the housing (42); after the low melting point alloy plate (41) is melted, the heating working area is connected to the inside and outside of the alloy containing component housing (32); The sensing part comprises a housing sensor (35) and a working area sensor (36); the working area sensor (36) is fixedly connected to the bottom of the housing (42); and the housing sensor (35) is fixedly connected to the heating working area and the outer wall of the alloy containing component housing (32).

5. The vibration-assisted downhole in-situ metal plugging device according to claim 4 is characterized in that: The housing (42) is provided with a slot for the low-melting-point alloy plate (41) to slide.

6. The vibration-assisted downhole in-situ metal plugging device according to claim 3 is characterized in that: The heating part comprises a plurality of heating cables (33), wherein the heating cables (33) are fixedly connected to the restraining component (31), the top ends of the heating cables (33) are electrically connected to the temperature control system (21), and the bottom ends of the heating cables (33) are located in the heating working area and the alloy containing component housing (32).

7. The vibration-assisted downhole in-situ metal plugging device according to claim 6 is characterized in that: The vibration part comprises a variable amplitude vibration head (34), the variable amplitude vibration head (34) is fixedly connected to the constraint component (31), the top end of the variable amplitude vibration head (34) is transmission-connected to the vibration generator (22), and the bottom end of the variable amplitude vibration head (34) is located in the heating working area and the alloy containing component shell (32).

8. The vibration-assisted downhole in-situ metal plugging device according to claim 7 is characterized in that: The restraining component (31) comprises a variable amplitude vibration head hole (312) opened in the middle and a plurality of heating cable restraining holes (311) opened in the circumferential direction, the plurality of heating cable restraining holes (311) are arranged at equal intervals in the circumferential direction, and the number of the heating cable restraining holes (311) matches the number of the heating cables (33); The variable amplitude vibration head (34) is fixedly connected in the variable amplitude vibration head hole (312).

9. The vibration-assisted downhole in-situ metal plugging device according to claim 1, characterized in that: The plugging alloy is a Bi-Sn alloy material, in which the mass percentage of Sn in the Bi-Sn alloy material is 27%-42%; the mass percentage of Bi metal is 58%-75%.

10. An in-situ metal plugging process, using the vibration-assisted downhole in-situ metal plugging device according to any one of claims 1 to 9, characterized in that: The steps include: Placing a bridge plug (62) in the plugging area and pouring a cement plug (61) on the bridge plug (62); After the cement plug (61) is fixed, the vibration-assisted downhole in-situ metal plugging device is placed; The heating part and the vibration part in the heating working area and alloy containing area part (3) are controlled by the electric energy and temperature control part (2) to heat and oscillate the plugging alloy filled in the heating working area and alloy containing area part (3) to make it molten, and then released to the top of the cement plug (61) by the bottom shell release component (4); The in-situ plugging device is removed, and the molten plugging alloy is cooled and solidified to form a metal plugging.

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