A squeezing device for oilfield workover operation

Abstract

The utility model discloses an oilfield workover operation extrusion ash device, including first agitator, second agitator and feed pipe. The utility model discloses through installing groove, first drive link and internal gear ring, in the installation process, the fixed mounting plate of second agitator bottom is aligned installing groove, and the vertical pressure makes mounting plate completely embeds in installing groove, thereby will second agitator firm installation in first agitator top, this structure design not only facilitates the quick installation second agitator, simultaneously can also easily separate two barrel body when dismounting maintenance, has solved and will lead to mortar mixing uneven if not fully mixing, cement hydration reaction is not complete, makes that mortar strength is deficient, and setting time is unstable, influences oilfield workover operation in well cementation, if the agitator is not convenient to dismounting cleaning, and the residual mortar can solidify agglomerate in the barrel, not only influence the follow -up stirring quality and efficiency, increase equipment wear and tear, also possibly breed bacteria, produce peculiar smell, pollute the problem of newly configured mortar.

Description

Technical Field

[0001] This utility model relates to the field of oilfield well workover operation technology, specifically to an oilfield well workover ash removal device. Background Technology

[0002] Oilfield well repair operations refer to the work performed during oil drilling and subsequent well maintenance. The purpose of these operations is to ensure the normal production and operation of the oil well. During long-term extraction, due to various reasons, oil wells may experience problems such as wellbore damage, wellbore collapse, and casing aging. These problems can affect the production capacity and safety of the oil well. Therefore, well repair operations are required to restore the integrity and function of the wellbore. During the oilfield well repair process, mixing tanks are used to mix raw materials such as cement and additives.

[0003] However, existing technologies have some problems:

[0004] During use, insufficient mixing will lead to uneven mixing of mortar and incomplete cement hydration reaction, resulting in insufficient mortar strength and unstable setting time. This will affect the construction quality of well cementing and plugging operations in oilfield well workover, and may even lead to well workover failure and rework, increasing operating costs and time costs. If the mixing tank is not easy to disassemble and clean, the residual mortar will solidify and clump inside the tank, which will not only affect the quality and efficiency of subsequent mixing and increase equipment wear, but may also breed bacteria, produce odors, and contaminate newly prepared mortar. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide an oilfield well workover slurry squeezing device. This device has the advantages of fully mixing the materials inside the first mixing tank and easily disassembling and cleaning the second mixing tank. It solves the problems caused by insufficient mixing, which leads to uneven slurry mixing, incomplete cement hydration, insufficient slurry strength, and unstable setting time. This affects the construction quality of well cementing and leak plugging operations in oilfield well workover, and may even lead to well workover failure, rework, and increased operating and time costs. Furthermore, if the mixing tank is not easily disassembled and cleaned, residual slurry will solidify and clump inside the tank, affecting the subsequent mixing quality and efficiency, increasing equipment wear, and potentially breeding bacteria, producing odors, and contaminating newly prepared slurry.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an oilfield well repair ash squeezing device, comprising a first mixing tank, a second mixing tank, and a conveying pipe, wherein the second mixing tank is movably installed on the top of the first mixing tank, the conveying pipe is movably connected to the bottom right side of the first mixing tank, a protective sleeve is fixedly installed on the top of the second mixing tank, a brake motor is fixedly installed on the top of the second mixing tank and located to the left of the protective sleeve, an installation assembly is provided on the top of the first mixing tank, and an annular sleeve is movably installed inside the second mixing tank.

[0007] As a preferred embodiment of the present invention, the installation component includes an installation groove and an installation plate. The installation groove is located on the top of the first mixing tank. There are four sets of installation grooves that are evenly distributed. The installation plate is movably installed inside the installation groove. The top of the installation plate is fixedly connected to the bottom of the second mixing tank.

[0008] In a preferred embodiment of this invention, the output end of the brake motor is connected to a first transmission rod located inside the protective sleeve. A first bevel gear is fixedly installed at the end of the first transmission rod away from the brake motor. A second bevel gear is movably installed inside the protective sleeve and meshes with the first bevel gear. A drive rod is fixedly installed at the bottom of the second bevel gear.

[0009] As a preferred embodiment of this utility model, an internal gear ring is fixedly installed inside the second mixing tank, and two sets of driven gears are movably installed inside the internal gear ring. The internal gear ring meshes with the driven gears, and a driven rod is fixedly installed at the bottom of the driven gears.

[0010] As a preferred embodiment of this utility model, a support rod is fixedly installed inside the annular sleeve and three sets are provided. The other end of the support rod is fixedly connected to the bottom of the surface of the active rod. The other end of the driven rod passes through the annular sleeve from top to bottom and extends to the bottom of the annular sleeve. A mixing rod is fixedly installed on the surface of the driven rod and is located at the bottom of the annular sleeve. Several sets of mixing rods are provided and are distributed in a ring at equal intervals.

[0011] As a preferred embodiment of this utility model, a control board is fixedly installed on the top left side of the second mixing tank, and a number of control buttons are fixedly installed on the top of the control board. The control buttons are electrically connected to the brake motor through wires.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model provides precise positioning and support for the installation of the second mixing tank through four sets of mounting slots evenly distributed on the top of the first mixing tank, including mounting grooves, a first transmission rod, and an internal gear ring. During installation, the mounting plate fixed to the bottom of the second mixing tank is aligned with the mounting slot, and vertical pressure is applied to fully embed the mounting plate into the mounting slot, thereby securely installing the second mixing tank on top of the first mixing tank. This structural design not only facilitates quick installation of the second mixing tank but also allows for easy separation of the two tanks during disassembly and maintenance, effectively improving the assembly and maintenance efficiency of the equipment and ensuring the stability of the connection between the upper and lower tanks during mixing operations. After the brake motor starts... The first transmission rod at its output end rotates at high speed inside the protective sleeve, driving the first bevel gear fixed at its end to rotate synchronously. The first bevel gear meshes with the second bevel gear movably installed inside the protective sleeve. Through the gear transmission principle, the rotational power is transmitted to the second bevel gear, causing the drive rod fixed at the bottom of the second bevel gear to rotate. This transmission structure uses bevel gears to change the direction of power transmission, converting the horizontal rotational power of the brake motor into the vertical rotational power of the drive rod, providing a stable and reliable power source for the subsequent stirring system. The protective sleeve protects the transmission components from external impurities and component wear, ensuring a secure installation. The internal gear ring inside the barrel serves as the transmission base, with two sets of driven gears meshing and rolling within it. When the driving rod rotates, it drives the connected components to rotate, which in turn drives the driven gears to roll along the inner wall of the internal gear ring. The driven rod, fixed at the bottom of the driven gear, rotates as the gears roll. Through this gear transmission method, the power of the driving rod is evenly distributed to each driven rod. This structural design achieves multi-directional transmission of mixing power, enabling multiple driven rods to operate synchronously. Combined with the mixing rod installed at the bottom, it can mix the raw materials in the barrel from different angles, significantly improving the uniformity and efficiency of mixing, and ensuring that cement and additives are thoroughly mixed. This invention solves the problems of uneven mortar mixing and incomplete cement hydration caused by insufficient mixing, resulting in insufficient mortar strength and unstable setting time. These issues affect the construction quality of well workover operations such as cementing and plugging, and may even lead to well workover failure, rework, and increased operating and time costs. Furthermore, if the mixing tank is not easy to disassemble and clean, residual mortar will solidify and clump inside the tank, which not only affects the quality and efficiency of subsequent mixing and increases equipment wear, but may also breed bacteria, produce odors, and contaminate newly prepared mortar. This invention has the advantages of fully mixing the materials inside the first mixing tank and conveniently disassembling and cleaning the second mixing tank.

[0014] 2. This utility model uses an installation component set on the top of the first mixing tank. Four sets of installation slots evenly distributed on the top of the first mixing tank provide precise positioning and support for the installation of the second mixing tank. During the installation process, the installation plate fixed at the bottom of the second mixing tank is aligned with the installation slot, and vertical pressure is applied to make the installation plate fully embedded in the installation slot, thereby firmly installing the second mixing tank on the top of the first mixing tank. This structural design not only facilitates the quick installation of the second mixing tank, but also allows for easy separation of the two tanks during disassembly and maintenance, effectively improving the assembly and maintenance efficiency of the equipment, and ensuring the stability of the connection between the upper and lower tanks during mixing operations.

[0015] 3. This utility model utilizes a first transmission rod located at the output end of the brake motor. After the brake motor starts, the first transmission rod at its output end rotates at high speed inside the protective sleeve, driving the first bevel gear fixed at its end to rotate synchronously. The first bevel gear meshes with the second bevel gear movably installed inside the protective sleeve. Through the gear transmission principle, the rotational power is transmitted to the second bevel gear, causing the driving rod fixed at the bottom of the second bevel gear to rotate. This transmission structure uses bevel gears to change the direction of power transmission, converting the horizontal rotational power of the brake motor into the vertical rotational power of the driving rod, providing a stable and reliable power source for the subsequent stirring system. The protective sleeve protects the transmission components, preventing interference from external impurities and wear on the components. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional view of the first mixing tank of this utility model;

[0018] Figure 3 This is a cross-sectional view of the second mixing tank of this utility model.

[0019] In the diagram: 1. First mixing tank; 2. Second mixing tank; 3. Conveying pipe; 4. Protective sleeve; 5. Brake motor; 6. Mounting assembly; 61. Mounting groove; 62. Mounting plate; 7. First transmission rod; 8. First bevel gear; 9. Second bevel gear; 10. Driving rod; 11. Internal gear ring; 12. Driven gear; 13. Driven rod; 14. Annular sleeve; 15. Support rod; 16. Mixing rod; 17. Control panel; 18. Control button. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1 to 3 As shown, the present invention provides an oilfield well repair ash squeezing device, including a first mixing tank 1, a second mixing tank 2 and a conveying pipe 3. The second mixing tank 2 is movably installed on the top of the first mixing tank 1, and the conveying pipe 3 is movably connected to the bottom right side of the first mixing tank 1. A protective sleeve 4 is fixedly installed on the top of the second mixing tank 2, and a brake motor 5 is fixedly installed on the top of the second mixing tank 2 and located to the left of the protective sleeve 4. An installation component 6 is provided on the top of the first mixing tank 1, and an annular sleeve 14 is movably installed inside the second mixing tank 2.

[0022] refer to Figure 2 The mounting component 6 includes a mounting groove 61 and a mounting plate 62. The mounting groove 61 is located on the top of the first mixing tank 1. There are four sets of mounting grooves 61 that are evenly distributed. The mounting plate 62 is movably installed inside the mounting groove 61. The top of the mounting plate 62 is fixedly connected to the bottom of the second mixing tank 2.

[0023] As a technical optimization of this utility model, the mounting component 6 set on the top of the first mixing tank 1 and the four sets of mounting grooves 61 evenly distributed on the top of the first mixing tank 1 provide precise positioning and support for the installation of the second mixing tank 2. During the installation process, the mounting plate 62 fixed at the bottom of the second mixing tank 2 is aligned with the mounting groove 61 and pressed down vertically to make the mounting plate 62 completely embedded in the mounting groove 61, thereby firmly installing the second mixing tank 2 on the top of the first mixing tank 1. This structural design not only facilitates the quick installation of the second mixing tank 2, but also allows for easy separation of the two tanks during disassembly and maintenance, effectively improving the assembly and maintenance efficiency of the equipment, and ensuring the stability of the connection between the upper and lower tanks during mixing operations.

[0024] refer to Figure 2 and Figure 3 The output end of the brake motor 5 is connected to the first transmission rod 7 and is located inside the protective sleeve 4. The first transmission rod 7 is fixedly installed with a first bevel gear 8 at the end away from the brake motor 5. The second bevel gear 9 is movably installed inside the protective sleeve 4 and meshes with the first bevel gear 8. The bottom of the second bevel gear 9 is fixedly installed with the drive rod 10.

[0025] As a technical optimization of this utility model, the first transmission rod 7 set at the output end of the brake motor 5 rotates at high speed inside the protective sleeve 4 after the brake motor 5 is started, driving the first bevel gear 8 fixed at the end to rotate synchronously. The first bevel gear 8 meshes with the second bevel gear 9 movably installed inside the protective sleeve 4. Through the gear transmission principle, the rotational power is transmitted to the second bevel gear 9, causing the active rod 10 fixed at the bottom of the second bevel gear 9 to rotate. This transmission structure uses bevel gears to change the direction of power transmission, converting the horizontal rotational power of the brake motor 5 into the vertical rotational power of the active rod 10, providing a stable and reliable power source for the subsequent stirring system. The protective sleeve 4 protects the transmission components, avoiding interference from external impurities and wear of the components.

[0026] refer to Figure 2 and Figure 3 The second mixing tank 2 has an internal gear ring 11 fixedly installed inside. The driven gear 12 is movably installed inside the internal gear ring 11 and there are two sets of it. The internal gear ring 11 meshes with the driven gear 12. The driven rod 13 is fixedly installed at the bottom of the driven gear 12.

[0027] As a technical optimization of this utility model, an internal gear ring 11 fixedly installed inside the second mixing tank 2 serves as the transmission base, with two sets of driven gears 12 rolling and meshing inside. When the driving rod 10 rotates, it drives the connected components to rotate, thereby driving the driven gears 12 to roll along the inner wall of the internal gear ring 11. The driven rod 13 fixed at the bottom of the driven gear 12 rotates with the rolling of the gear. Through this gear transmission method, the power of the driving rod 10 is evenly distributed to each driven rod 13. This structural design realizes the multi-directional transmission of mixing power, enabling multiple driven rods 13 to operate synchronously. In conjunction with the mixing rod 16 installed at the bottom, the raw materials in the tank can be mixed from different angles, significantly improving the uniformity and efficiency of mixing, and ensuring that cement and additives are fully mixed.

[0028] refer to Figure 2 and Figure 3 The annular sleeve 14 has a support rod 15 fixedly installed inside and has three sets. The other end of the support rod 15 is fixedly connected to the bottom of the surface of the active rod 10. The other end of the driven rod 13 passes through the annular sleeve 14 from top to bottom and extends to the bottom of the annular sleeve 14. The driven rod 13 has a mixing rod 16 fixedly installed on its surface and located at the bottom of the annular sleeve 14. The mixing rod 16 has several sets and is distributed in a ring at equal intervals.

[0029] As a technical optimization of this utility model, support rods 15 are set inside the annular sleeve 14. Three sets of support rods 15 are evenly distributed inside the annular sleeve 14. One end of each set of support rods 15 is fixed to the inner wall of the annular sleeve 14, and the other end is connected to the bottom of the active rod 10, providing stable support for the active rod 10 and ensuring its stability during high-speed rotation. The driven rod 13 passes through the annular sleeve 14 from top to bottom and extends to the bottom. Several sets of mixing rods 16 are evenly distributed on its surface. Driven by the driven rod 13, they make circular motion around the central axis of the barrel. During operation, the mixing rods 16 penetrate into the raw materials. Through the stirring force generated by the rotation, the cement, additives and other raw materials are stirred and mixed in an all-round and multi-angle manner, so that the raw materials form a complex flow trajectory in the barrel, effectively avoiding stirring dead corners, ensuring the quality of mortar mixing, and meeting the strict requirements of oilfield well repair operations for mortar uniformity.

[0030] refer to Figure 2 and Figure 3 A control board 17 is fixedly installed on the top left side of the second mixing tank 2. A control button 18 is fixedly installed on the top of the control board 17 and several sets are provided. The control button 18 is electrically connected to the brake motor 5 through wires.

[0031] As a technical optimization of this utility model, a control board 17 is installed on the top of the second mixing tank 2. The control board 17, installed on the top left side of the second mixing tank 2, integrates multiple sets of control buttons 18. These buttons are electrically connected to the brake motor 5 through wires. The operator can use the control buttons 18 to precisely control the brake motor 5 according to different operational needs, including functions such as starting, stopping, and adjusting the speed. For example, before starting mixing, the start button is pressed to start the brake motor 5; according to the characteristics of the raw materials and mixing requirements, the motor speed is adjusted by adjusting the buttons to control the mixing intensity and time; after mixing is completed, the stop button is pressed to turn off the motor. This control method is simple and intuitive to operate, and can flexibly adapt to the mixing needs of various well repair operation scenarios, ensuring the safe and efficient operation of the ash squeezing device.

[0032] The working principle and usage process of this utility model are as follows: First, place the first mixing tank 1 at the work site. Align the mounting plate 62 at the bottom of the second mixing tank 2 with the four equidistant mounting slots 61 at the top of the first mixing tank 1, and press it vertically into place to complete the installation. Next, connect the conveying pipe 3 to the bottom right side of the first mixing tank 1. Then, add cement, additives, and other raw materials into the second mixing tank 2. Start the brake motor 5 using the button on the control panel 17 on the top left side of the second mixing tank 2. The first transmission rod 7 at the motor output end drives the first bevel gear 8 in the protective sleeve 4. The internal rotation of the second bevel gear 9 transmits power to the drive rod 10 through meshing. The drive rod 10 is stabilized by three sets of support rods 15 inside the annular sleeve 14. At the same time, it drives two sets of driven gears 12 that mesh with the gear ring 11 inside the second mixing tank 2, which in turn drive the driven rod 13 and the mixing rods 16 distributed in the bottom ring to mix the raw materials from multiple angles and in all directions. After mixing is completed, the motor is turned off by the control button 18. The mortar is transported to the well repair operation site through the conveying pipe 3. After the operation is completed, the two tanks are separated by the convenient disassembly and assembly characteristics of the installation component 6 for cleaning and maintenance.

[0033] In summary, this oilfield well workover ash removal device, through the installation grooves 61, the first transmission rod 7, and the internal gear ring 11, provides precise positioning and support for the installation of the second mixing tank 2 by four sets of installation grooves 61 evenly distributed on the top of the first mixing tank 1. During installation, the installation plate 62 fixed at the bottom of the second mixing tank 2 is aligned with the installation grooves 61, and vertically pressed down to make the installation plate 62 completely embedded in the installation grooves 61, thereby firmly installing the second mixing tank 2 on top of the first mixing tank 1. This structural design not only facilitates the rapid installation of the second mixing tank 2, but also allows for easy separation of the two tanks during disassembly and maintenance, effectively improving the assembly and maintenance efficiency of the equipment. Furthermore, to ensure the stability of the connection between the upper and lower tanks during mixing operations, after the brake motor 5 starts, its output end first transmission rod 7 rotates at high speed inside the protective sleeve 4, driving the first bevel gear 8 fixed at its end to rotate synchronously. The first bevel gear 8 meshes with the second bevel gear 9 movably installed inside the protective sleeve 4, transmitting rotational power to the second bevel gear 9 through the gear transmission principle, causing the drive rod 10 fixed at the bottom of the second bevel gear 9 to rotate. This transmission structure utilizes bevel gears to change the direction of power transmission, converting the horizontal rotational power of the brake motor 5 into the vertical rotational power of the drive rod 10, providing a stable and reliable power source for the subsequent mixing system, and... The transmission components are protected by a protective sleeve 4 to prevent interference from external impurities and wear. An internal gear ring 11, fixedly installed inside the barrel, serves as the transmission base. Two sets of driven gears 12 mesh internally within this ring. When the driving rod 10 rotates, it drives the connected components to rotate, thereby driving the driven gears 12 to roll along the inner wall of the internal gear ring 11. The driven rods 13, fixed to the bottom of the driven gears 12, rotate with the rolling of the gears. Through this gear transmission method, the power of the driving rod 10 is evenly distributed to each driven rod 13. This structural design achieves multi-directional transmission of stirring power, enabling multiple driven rods 13 to operate synchronously, in conjunction with the mixing components installed at the bottom. The 16-bar linkage can stir the raw materials in the bucket from different angles, significantly improving the uniformity and efficiency of the mixing. This ensures that cement and additives are fully mixed, solving the problem that insufficient mixing leads to uneven mortar mixing, incomplete cement hydration, insufficient mortar strength, and unstable setting time. This affects the construction quality of well cementing and plugging operations in oilfield well workover, and may even lead to well workover failure, rework, and increased operating and time costs. If the mixing bucket is not easy to disassemble and clean, residual mortar will solidify and clump inside the bucket, which not only affects the quality and efficiency of subsequent mixing and increases equipment wear, but may also breed bacteria, produce odors, and contaminate newly prepared mortar.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A squeeze device for oilfield workover operations, comprising a first mixing barrel (1), a second mixing barrel (2) and a transfer pipe (3), characterized in that: The second stirring barrel (2) is movably installed on the top of the first stirring barrel (1), the material conveying pipe (3) is movably communicated on the right bottom of the first stirring barrel (1), the second stirring barrel (2) is fixedly installed with a protective sleeve (4) on the top, the second stirring barrel (2) is fixedly installed with a brake motor (5) on the left of the protective sleeve (4), the first stirring barrel (1) is provided with a mounting assembly (6) on the top, and the second stirring barrel (2) is movably installed with an annular sleeve (14) inside.

2. The squeeze cementing apparatus of claim 1, wherein: The mounting assembly (6) comprises mounting grooves (61) and mounting plates (62), the mounting grooves (61) are arranged on the top of the first stirring barrel (1), the mounting grooves (61) are provided with four groups and are equidistantly distributed, and the mounting plates (62) are movably installed in the mounting grooves (61).

3. The squeeze cementing apparatus of claim 1, wherein: The brake motor (5) is drivingly connected with a first transmission rod (7) and located inside the protective sleeve (4), the first transmission rod (7) is fixedly installed with a first bevel gear (8) at the end away from the brake motor (5), the protective sleeve (4) is movably installed with a second bevel gear (9) inside and engaged with the first bevel gear (8), and the second bevel gear (9) is fixedly installed with a driving rod (10) at the bottom.

4. The squeeze cementing apparatus of claim 1, wherein: The second stirring barrel (2) is fixedly installed with an internal gear ring (11) inside, the internal gear ring (11) is movably installed with driven gears (12) inside and provided with two groups, the internal gear ring (11) is engaged with the driven gears (12), and the driven gears (12) are fixedly installed with driven rods (13) at the bottom.

5. The squeeze cementing apparatus of claim 1, wherein: The annular sleeve (14) is fixedly installed with support rods (15) inside and provided with three groups, the support rods (15) are fixedly connected with the surface of the driving rod (10) at the other end, the driven rods (13) are penetrated into the annular sleeve (14) from top to bottom at the other end and extended to the bottom of the annular sleeve (14), the driven rods (13) are fixedly installed with stirring rods (16) on the surface and located at the bottom of the annular sleeve (14), and the stirring rods (16) are provided with a plurality of groups and are equidistantly distributed in a ring shape.

6. The squeeze cementing apparatus of claim 1, wherein: The control panel (17) is fixedly installed on the left top of the second stirring barrel (2), the control panel (17) is fixedly installed with control buttons (18) on the top and provided with a plurality of groups, and the control buttons (18) are electrically connected with the brake motor (5) through wires.

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