Cement slurry cementing vibration device and usage method

Abstract

The present invention relates to a vibration device for cement slurry cementing, which includes a fixed plate, a driving component, an inner rod, and a sliding outer cylinder. The inner rod is fixedly installed at the bottom of the fixed plate, the sliding outer cylinder is sleeved outside the inner rod, the driving component is installed on the fixed plate, and the output end of the driving component is fixedly connected to the top of the sliding outer cylinder. The driving component can drive the sliding outer cylinder to axially move along the outside of the inner rod. A placement cavity is provided inside the inner rod, a vibration component is installed inside the placement cavity, and a plurality of connecting cylinders are fixedly installed on the outer wall of the inner rod. The connecting cylinders are communicated with the placement cavity, and a jitter mechanism is slidably connected inside the connecting cylinder. The jitter mechanism penetrates through the connecting cylinder and its end is connected to a cleaning mechanism, and the cleaning mechanism is rotatably connected to the jitter mechanism. A striking component is rotatably installed on the outer wall of the sliding outer cylinder, and the striking component passes through the cleaning mechanism and can slide along it. The present invention can improve the cementing effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of cementing equipment, and particularly relates to a cement slurry cementing vibration device and a use method thereof. Background Art

[0002] When an oil drilling rig drills a wellbore in a formation using a drill bit, it is necessary to cement the wellbore. The cementing steps are as follows: workers first lower the casing into the wellbore, and then inject cement into the annulus area between the wellbore and the casing. After the cement setting time ends, the cement forms a cement column, and the cement column supports the wellbore to prevent the wellbore from collapsing, playing the role of cementing. In the actual cementing process, voids or pores will be generated in the cement. When the cement solidifies into a cement column, due to the existence of voids or pores in the cement column, the strength of the cement column becomes low, further reducing the supporting strength of the cement column. The existing cementing device uses a rammer to tamp the top of the cement column. Through the vibration generated by the rammer, it acts on the top of the cement column to accelerate the downward flow of the cement, so as to achieve the purpose of eliminating voids or pores. However, the vibration generated by the rammer cannot be transmitted to the voids or pores in the lower end area of the cement column, thus resulting in the inability to completely eliminate the voids or pores, and there is a defect that the voids or pores cannot be completely eliminated. Summary of the Invention

[0003] The present invention provides a cement slurry uniform vibration type cementing device and method. By driving the device to move inside the casing through a towing rope, after reaching a specific position of the casing, the inner wall of the casing can be knocked and vibrated, thus realizing the purpose of casing movement, eliminating voids and pores in the cement, improving the bonding quality between the casing and the cement, and increasing the connection strength between the cement slurry and the casing, thereby improving the cementing effect.

[0004] The present invention solves its technical problems by adopting the following technical solutions:

[0005] A cement slurry cementing vibration device, including a fixing plate, a driving component, an inner rod, and a sliding outer cylinder. The inner rod is fixedly installed at the bottom of the fixing plate. The sliding outer cylinder is sleeved outside the inner rod. The driving component is installed on the fixing plate, and the output end of the driving component is fixedly connected to the top of the sliding outer cylinder. The driving component can drive the sliding outer cylinder to axially move along the outside of the inner rod;

[0006] The interior of the inner rod is provided with a placement cavity. A vibration assembly is installed inside the placement cavity. A plurality of connecting cylinders are fixedly installed on the outer wall of the inner rod. The connecting cylinders communicate with the placement cavity. A jitter mechanism is slidably connected inside the connecting cylinder. The jitter mechanism penetrates through the connecting cylinder and its end is connected to a cleaning mechanism. The cleaning mechanism is rotatably connected to the jitter mechanism. A striking assembly is rotatably installed on the outer wall of the sliding outer cylinder. The striking assembly passes through the cleaning mechanism and can slide along it.

[0007] The vibration assembly can drive the jitter mechanism to move radially back and forth, thereby driving the cleaning mechanism to move, so that the striking assembly reciprocally strikes the vibration sleeve.

[0008] Furthermore, the vibration assembly includes an electric push rod, a mounting plate and a toothed plate. The electric push rod is fixedly installed on the top of the placement cavity. The output end of the electric push rod is fixedly connected to the mounting plate. The mounting plate is fixedly connected to the toothed plate. A plurality of annular convex portions are formed at equal intervals on the outer wall of the toothed plate, and a concave portion is formed between adjacent two convex portions.

[0009] Furthermore, the jitter mechanism includes a push rod and a spring. The push rod passes through the connecting cylinder. A baffle is fixedly installed at one end of the push rod located outside the inner rod. The spring is sleeved on the push rod, and its two ends are respectively fixedly connected to the connecting cylinder and the baffle. An arc structure is formed at one end of the push rod close to the vibration assembly. The arc structure can be engaged in the concave portion.

[0010] Furthermore, the cleaning mechanism includes a cleaning sleeve and a scraping cylinder. The cleaning sleeve is rotatably installed at the end of the push rod. The scraping cylinder is fixedly installed on the cleaning sleeve. The striking assembly passes through the cleaning sleeve and the scraping cylinder and can slide along them.

[0011] Furthermore, the striking assembly includes a striking rod and a steel ball. The striking rod rotatably passes through the cleaning sleeve and the scraping cylinder, and the other end of the striking rod is fixedly connected to the steel ball.

[0012] Furthermore, the scraping cylinder is a frustum structure with a pointed end and a wide end, and the wide end is located on the side close to the cleaning sleeve. The scraping cylinder is fixedly connected to the cleaning sleeve.

[0013] Furthermore, rubber pads are installed on the surfaces of the cleaning sleeve and the scraping cylinder in contact with the striking rod.

[0014] Furthermore, a clamping base is fixedly installed at the bottom of the sliding outer cylinder. A clamping cavity adapted to the inner rod is opened inside the clamping base. The bottom of the inner rod is fixedly installed in the clamping cavity in a clamped manner.

[0015] Furthermore, a card slot is provided inside the engaging cavity, and a card block adapted to the card slot is fixedly mounted on the side wall of the inner rod.

[0016] The method for using the above-mentioned cement slurry cementing vibration device comprises the following steps:

[0017] After cement is injected into the annular space between the wellbore and the casing, the device is placed inside the casing, the driving assembly works, the sliding outer cylinder is driven to slide downward compared to the inner rod, and the striking assembly is stretched open by the shaking mechanism until it is tightly pressed against the inner wall of the casing;

[0018] The vibration assembly moves up and down in the placement cavity of the inner rod, and is connected with the shaking mechanism through the tooth plate, so that the shaking mechanism moves back and forth on the side wall of the inner rod, thereby driving the striking assembly, so that the striking assembly strikes the inner wall of the casing back and forth, causing the casing to vibrate, thereby accelerating the flow of cement inside the annular area and eliminating the gaps in the cement;

[0019] When the vibration operation is completed, the sliding outer cylinder is driven in the reverse direction by the driving assembly to shrink the striking assembly, and during the shrinking process, the striking rod slides inside the cleaning mechanism to clean the striking rod.

[0020] The advantages and positive effects of the present invention are:

[0021] 1. In the present invention, under the cooperation between the traction rope and the device, the device can be placed inside the casing through the traction rope, and the sliding outer cylinder can slide outside the inner rod, that is, the sliding outer cylinder and the inner rod move relative to each other, so that a plurality of striking components outside the sliding outer cylinder are opened inside the casing and fit with the inner wall of the casing, so that the device fits with the casing, and the inner wall of the casing is struck and vibrated by the striking components, and under the cooperation between the sliding outer cylinder and the inner rod, the sliding position of the sliding outer cylinder and the inner rod can be adjusted to adjust the opening angle of the striking components, so that the striking components can fit inside casings of different sizes to operate, thereby performing vibration reinforcement operations on casings of different diameters, thereby improving the scope of application of the device;

[0022] 2. In the present invention, the towing rope can drive the device to a specific position inside the casing, and the knocking component outside the sliding outer cylinder knocks on the inner wall of the casing, causing the casing to vibrate, achieving the purpose of casing movement, improving the cementing quality between the casing and the cement, enhancing the connection strength between the cement slurry and the casing, thereby improving the cementing effect. Moreover, the device can reciprocate inside the casing under the action of the towing rope, achieving full vibration of the casing, making the vibration effect of the casing more thorough and comprehensive, and being more flexible to use. After the reinforcement operation, the device can be taken out of the casing and recycled through the towing rope, thus effectively reducing the use cost of the device;

[0023] 3. In the present invention, by providing a vibration component that can slide up and down inside the inner rod, the electric push rod can drive the toothed plate to move up and down inside the placement cavity. Thus, under the mutual cooperation of the protruding part and the recessed part on the toothed plate, the shaking mechanism can be driven to reciprocate on the side wall of the inner rod, and the striking rod can be lifted and pulled, enabling the striking rod to reciprocally knock on the inner wall of the casing, thereby realizing the vibration of the inner wall of the casing;

[0024] 4. In the present invention, by providing a cleaning mechanism at one end of the shaking component, the cleaning sleeve can scrape and clean the impurities and dust on the outside of the striking rod during the expansion and retraction of the striking rod. Moreover, scraping cylinders with a frustum structure are provided at both ends of the cleaning sleeve. The pointed end of the scraping cylinder can shear the impurities adhered to the outside of the striking rod, and then the rubber pad wipes the sheared impurities, making the cleaning effect of the cleaning mechanism on the striking rod more thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following will further describe the technical solutions of the present invention in detail in conjunction with the drawings and embodiments. However, it should be noted that these drawings are only designed for explanatory purposes and thus do not limit the scope of the present invention. In addition, unless otherwise specified, these drawings are only intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0026] Figure 1 It is a schematic diagram of the working state of the cement slurry cementing vibration device provided by the embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the cement slurry cementing vibration device provided by the embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the inner rod in the cement slurry cementing vibration device provided by the embodiment of the present invention;

[0029] Figure 4 It is a sectional view of the inner rod in the cement slurry cementing vibration device provided by the embodiment of the present invention;

[0030] Figure 5 Schematic connection diagram of the inner rod, sliding outer cylinder and vibration assembly in the cement slurry well cementing vibration device provided by the embodiment of the present invention;

[0031] Figure 6 Schematic connection diagram of the jitter mechanism, vibration assembly and cleaning mechanism in the cement slurry well cementing vibration device provided by the embodiment of the present invention;

[0032] Figure 7 Schematic structure diagram of the rubber pad in the cement slurry well cementing vibration device provided by the embodiment of the present invention;

[0033] Figure 8 Schematic diagram of the storage state of the striking assembly in the cement slurry well cementing vibration device provided by the embodiment of the present invention. Detailed implementation manners

[0034] First of all, it should be noted that the following will specifically illustrate the specific structure, characteristics and advantages of the present invention by way of examples. However, all the descriptions are only for the purpose of explanation and should not be construed as any limitation to the present invention. In addition, any single technical feature described or implied in each embodiment mentioned in this article, or any single technical feature shown or implied in each drawing, can still be arbitrarily combined or deleted between these technical features (or their equivalents), so as to obtain more other embodiments of the present invention that may not be directly mentioned in this article. In addition, for the sake of simplifying the drawings, the same or similar technical features may only be marked at one place in the same drawing.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0036] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0037] The cement slurry cementing vibration device provided in this embodiment includes a fixing plate 1, a driving component 2, an inner rod 3, and a sliding outer cylinder 4. The inner rod 3 is fixedly installed at the bottom of the fixing plate 1. The sliding outer cylinder 4 is sleeved outside the inner rod 3. The driving component 2 is installed on the fixing plate 1, and the output end of the driving component 2 is fixedly connected to the top of the sliding outer cylinder 4. The driving component 2 can drive the sliding outer cylinder 4 to axially move along the outside of the inner rod 3. In order to make the sliding outer cylinder 4 move more stably along the outside of the inner rod 3, it can be considered that a limiting sliding groove 35 adapted to the sliding outer cylinder 4 is opened on the outer wall of the inner rod 3. The sliding outer cylinder 4 is slidably connected inside the limiting sliding groove 35. The driving component 2 can be a cylinder, which is electrically connected to an external power supply through an electric wire.

[0038] A placement cavity 33 is provided inside the inner rod 3. A vibration component 5 is installed inside the placement cavity 33. A plurality of connecting cylinders 32 are fixedly installed on the outer wall of the inner rod 3. The connecting cylinders 32 communicate with the placement cavity 33. A jitter mechanism 34 is slidably connected inside the connecting cylinder 32. The jitter mechanism 34 penetrates through the connecting cylinder 32 and its end is connected to a cleaning mechanism 31. The cleaning mechanism 31 is rotatably connected to the jitter mechanism 34. In order to facilitate the axial movement of the sliding outer cylinder 4 along the outside of the inner rod 3, it can be considered that a hole groove 43 adapted to the connecting cylinder 32 is opened on the sliding outer cylinder 4, so that the axial movement of the sliding outer cylinder 4 along the outside of the inner rod 3 will not be limited by the connecting cylinder 32. A striking component 41 is rotatably installed on the outer wall of the sliding outer cylinder 4. The striking component 41 passes through the cleaning mechanism 31 and can slide along it.

[0039] The vibration component 5 can drive the jitter mechanism 34 to move radially back and forth, thereby driving the cleaning mechanism 31 to move, so that the striking component 41 strikes and vibrates the casing reciprocally.

[0040] Specifically, the vibration component 5 includes an electric push rod 51, a mounting plate 52, and a toothed plate 53. The electric push rod 51 is fixedly installed at the top of the placement cavity 33. The electric push rod 51 can be considered as the output end of a cylinder. The electric push rod 51 is fixedly connected to the mounting plate 52. The mounting plate 52 is fixedly connected to the toothed plate 53. A plurality of annular protruding portions 531 are formed at equal intervals on the outer wall of the toothed plate 53, and a recessed portion 532 is formed between two adjacent protruding portions 531.

[0041] The jitter mechanism 34 includes a push rod 341 and a spring 343. The push rod 341 passes through the connecting cylinder 32. One end of the push rod 341 located outside the inner rod 3 is fixedly installed with a baffle 344. The spring 343 is sleeved on the push rod 341, and its two ends are respectively fixedly connected to the connecting cylinder 32 and the baffle 344. One end of the push rod 341 close to the vibration assembly 5 forms an arc structure 342, and the arc structure 342 can be engaged in the recess 532.

[0042] The cleaning mechanism 31 includes a cleaning sleeve 311 and a debris scraping cylinder 312. The cleaning sleeve 311 is rotatably installed at the end of the push rod 341. The debris scraping cylinder 312 is fixedly installed on the cleaning sleeve 311. The striking assembly 41 passes through the cleaning sleeve 311 and the debris scraping cylinder 312 and can slide along them.

[0043] The striking assembly 41 includes a striking rod 412 and a steel ball 413. The striking rod 412 rotatably passes through the cleaning sleeve 311 and the debris scraping cylinder 312. One end of the striking rod 412 is fixedly connected to the sliding outer cylinder 4 through a connecting ear 411, and the other end of the striking rod 412 is fixedly connected to the steel ball 413.

[0044] The debris scraping cylinder 312 has a pointed end 3121 and a wide end 3122, and the wide end 3122 is located on the side close to the cleaning sleeve 311. The debris scraping cylinder 312 is fixedly connected to the cleaning sleeve 311; and, rubber pads 313 are installed on the surfaces of the cleaning sleeve 311 and the debris scraping cylinder 312 in contact with the cleaning mechanism 31. In addition, it can also be considered that a plurality of arc-shaped protrusions 314 distributed in a central stack are formed on the rubber pads 313 on the surfaces of the debris scraping cylinder 312 in contact with the cleaning mechanism 31.

[0045] A connection port 11 is fixedly installed on the top of the fixing plate 1. A traction rope 12 is wound inside the connection port 11, and the other end of the traction rope 12 is fixedly connected to an external wire drum.

[0046] A clamping base 42 is fixedly installed at the bottom of the sliding outer cylinder 4, and a clamping cavity 421 adapted to the inner rod 3 is opened inside the clamping base 42. The bottom of the inner rod 3 is clamped and fixedly installed inside the clamping cavity 421; a clamping groove 422 is opened inside the clamping cavity 421, and a clamping block 36 adapted to the clamping groove 422 is fixedly installed on the side wall of the inner rod 3. The clamping block 36 can be clamped and fixed inside the clamping groove 422 to realize the limit of the sliding outer cylinder 4 and the inner rod 3.

[0047] In this embodiment, as Figure 1 and Figure 2As shown in the figure, a casing 61 is placed inside the wellbore 6, and an annular space 62 is formed between the casing 61 and the wellbore 6: After the oil drilling rig drills the wellbore 6 in the formation using a drill bit, the worker first lowers the casing 61 into the wellbore 6, and then injects cement into the annular space 62 between the wellbore 6 and the casing 61. After the cement setting time ends, the cement forms a cement column to support the wellbore 6 and prevent the wellbore 6 from collapsing, playing the role of well cementing.

[0048] A connection port 11 is fixedly installed at the top of the fixed plate 1. A towing rope 12 is wound inside the connection port 11. The other end of the towing rope 12 is fixedly connected to an external wire reel. By tightening and relaxing the towing rope 12 through the external wire reel, the height of the fixed plate 1 and each component at the bottom of the fixed plate 1 can be adjusted, enabling the device to reciprocate inside the casing 61 under the action of the towing rope 12, achieving full vibration of the casing 61, making the vibration effect of the casing 61 more thorough and comprehensive, more flexible to use, and after the reinforcement operation, the device can be taken out of the casing 61 and recycled through the towing rope 12, thus effectively reducing the use cost of the device.

[0049] As Figure 2 、 Figure 3 and Figure 4 shown; Combining the above content, an inner rod 3 is fixedly installed at the bottom of the fixed plate 1, and a sliding outer cylinder 4 is sleeved outside the inner rod 3. A limiting sliding groove 35 adapted to the sliding outer cylinder 4 is formed on the outer wall of the inner rod 3. The sliding outer cylinder 4 is slidably connected inside the limiting sliding groove 35. A driving component 2 is fixedly installed outside the inner rod 3. The driving component 2 is electrically connected to an external power source, and the output end of the driving component 2 is fixedly connected to the top of the sliding outer cylinder 4. A plurality of striking components 41 distributed symmetrically about the center are rotatably connected to the outside of the sliding outer cylinder 4.

[0050] In this implementation scheme, after the device is inserted into the casing 61, the driving component 2 is started, and under the action of the limiting sliding groove 35, the driving component 2 can drive the sliding outer cylinder 4 to slide downward outside the inner rod 3. Since a plurality of striking components 41 distributed symmetrically about the center are rotatably connected to the outside of the sliding outer cylinder 4, during the downward sliding of the sliding outer cylinder 4, the striking components 41 can be driven to slide inside the cleaning mechanism 31, and under the action of the cleaning mechanism 31, the striking components 41 can rotate on the outer wall of the sliding outer cylinder 4, thereby realizing the expansion of the sliding outer cylinder 4.

[0051] It should be noted that when the sliding outer cylinder 4 slides outside the inner rod 3, the striking rod 412 slides inside the cleaning mechanism 31. As the sliding outer cylinder 4 moves downward, one end of the striking rod 412 rotates on the outer wall of the sliding outer cylinder 4 through the first connecting ear 411, and the steel ball 413 at the other end of the striking rod 412 is pushed outward until the steel ball 413 is in close contact with the inside of the sleeve 61, thereby realizing the connection between the striking assembly 41 and the sleeve 61.

[0052] It should be understood that the driving assembly 2 can adopt a telescopic cylinder with adjustable stroke. The telescopic cylinder can drive the sliding outer cylinder 4 to move different distances outside the inner rod 3. By adjusting the sliding position of the sliding outer cylinder 4 and the inner rod 3, the opening angle of the striking assembly 41 can be adjusted, so that the striking assembly 41 can fit inside sleeves 61 with different sizes and perform vibration reinforcement operations on sleeves 61 with different diameters, thereby improving the application range of the device.

[0053] Furthermore; combining the above content: a placement cavity 33 is opened inside the inner rod 3, and a vibration assembly 5 is slidably connected inside the placement cavity 33. The vibration assembly 5 includes an electric push rod 51, a mounting plate 52, and a toothed plate 53. The electric push rod 51 is fixedly installed at the top of the inner cavity of the placement cavity 33. The electric push rod 51 is electrically connected to an external power source. The output end of the electric push rod 51 is fixedly connected to the mounting plate 52, and the other side of the mounting plate 52 is fixedly connected to the toothed plate 53. A number of equally spaced protruding portions 531 are fixedly installed outside the toothed plate 53, and a recessed portion 532 is provided between two adjacent protruding portions 531.

[0054] In this embodiment: when the steel ball 413 at one end of the striking rod 412 is in close contact with the inner wall of the sleeve 61, the electric push rod 51 is started. The electric push rod 51 can drive the toothed plate 53 to move up and down inside the placement cavity 33. Since a guiding chute 331 adapted to the mounting plate 52 is opened inside the placement cavity 33, the mounting plate 52 is slidably connected inside the guiding chute 331. Driven by the electric push rod 51, the mounting plate 52 and the toothed plate 53 at the bottom of the mounting plate 52 slide up and down inside the placement cavity 33, and limit the moving direction of the toothed plate 53, so that the toothed plate 53 can be ready to engage with the shaking mechanism 34.

[0055] It should be noted that a number of equally spaced protruding portions 531 are fixedly installed outside the toothed plate 53, and a recessed portion 532 is provided between two adjacent protruding portions 531. When the toothed plate 53 slides up and down, the toothed plate 53 can be connected to the push rod 341 through the protruding portions 531 and the recessed portion 532, thereby driving the push rod 341 to move inside the connecting cylinder 32.

[0056] It should be understood that: a plurality of connecting cylinders 32 are fixedly installed on the outer wall of the inner rod 3 at equal intervals. The connecting cylinder 32 is communicated with the placement cavity 33, and a shaking mechanism 34 is slidably connected inside the connecting cylinder 32. The connecting cylinder 32 is used to provide a moving space for the shaking mechanism 34, so that the shaking mechanism 34 can reciprocate back and forth inside the connecting cylinder 32, and provide power for the rotation and hitting of the hitting component 41.

[0057] As Figure 5 , Figure 6 , Figure 7 and Figure 8 shown; in this embodiment, when the toothed plate 53 moves up and down inside the placement cavity 33, the push rod 341 is pushed by the convex part 531 and the concave part 532, so that the push rod 341 is pushed out of the connecting cylinder 32. When the push rod 341 moves to the concave part 532, under the elastic force of the spring 343, the push rod 341 is pulled back to its original position, so as to realize the reciprocating movement of the push rod 341 inside the connecting cylinder 32. Since the other side of the push rod 341 is rotatably connected to the hitting rod 412, during the reciprocating movement of the push rod 341, the hitting rod 412 can be driven to knock back and forth on the inner wall of the sleeve 61, so as to strike and vibrate the sleeve 61.

[0058] It should be noted that: a connecting block 345 is fixedly installed on the side of the baffle 344 away from the push rod 341, and a rotating block 346 is rotatably connected to the connecting block 345. The other end of the rotating block 346 is rotatably connected to a second connecting ear 347, and the second connecting ear 347 is fixedly installed on the outside of the cleaning sleeve 311. During the reciprocating movement of the push rod 341, the rotating block 346 and the second connecting ear 347 can be rotatably connected, so as to realize the position compensation between the hitting rod 412 and the push rod 341, so that during the rotation of the hitting rod 412, rotational compensation can be carried out through the rotating block 346, so as to realize that during the reciprocating movement of the push rod 341, the hitting rod 412 can rotate on the outer wall of the sliding outer cylinder 4.

[0059] As Figure 3 and Figure 4 shown; combining the above content, the cleaning mechanism 31 includes a cleaning sleeve 311, a scraping cylinder 312 and a rubber pad 313. The cleaning sleeve 311 is adapted to the hitting rod 412, and the hitting rod 412 is slidably connected inside the cleaning sleeve 311. The scraping cylinder 312 is fixedly installed at both ends of the cleaning sleeve 311. The cleaning sleeve 311 is communicated with the scraping cylinder 312, and the rubber pad 313 is adhesively fixed inside the cleaning sleeve 311 and the scraping cylinder 312.

[0060] In this embodiment, by providing a cleaning mechanism 31 at one end of the dithering mechanism 34, the cleaning sleeve 311 can slide on the outside of the striking rod 412 during the expansion and storage processes of the striking rod 412, and scrape and clean the impurities and dust on the outside of the striking rod 412. Moreover, scraping cylinders 312 with a conical structure are provided at both ends of the cleaning sleeve 311. The pointed end 3121 of the scraping cylinder 312 can shear the impurities adhered to the outside of the striking rod 412, and guide and discharge them through the wide end 3122 of the scraping cylinder 312. Then, the rubber pad 313 wipes the sheared impurities, making the cleaning effect of the cleaning mechanism 31 on the striking rod 412 more thorough.

[0061] It should be noted that: a plurality of arc-shaped protrusions 314 distributed centrally in a stacked manner are formed on the rubber pad 313 on the inner wall of the scraping cylinder 312. The arc-shaped protrusions 314 can increase the contact area between the rubber pad 313 and the striking rod 412, increasing the friction force between the rubber pad 313 and the striking rod 412, and thus improving the cleaning effect of the rubber pad 313 on the striking rod 412.

[0062] It should be understood that: a clamping base 42 is fixedly installed at the bottom of the sliding outer cylinder 4, and a clamping cavity 421 adapted to the inner rod 3 is provided inside the clamping base 42. The bottom of the inner rod 3 is clamped and fixedly installed inside the clamping cavity 421. A clamping groove 422 is provided inside the clamping cavity 421, and a clamping block 36 adapted to the clamping groove 422 is fixedly installed at the bottom of the inner rod 3. The clamping block 36 is clamped and fixed inside the clamping groove 422. The clamping base 42 is used to limit the moving position of the inner rod 3. When the driving assembly 2 reversely drives the sliding outer cylinder 4, the cleaning mechanism 31 cleans the striking rod 412 until the inner rod 3 is clamped and fixed in the clamping groove 422 inside the clamping base 42 through the clamping block 36, thereby limiting and fixing the connection between the inner rod 3 and the sliding outer cylinder 4.

[0063] The usage method of the cement slurry well cementing vibration device includes the following steps:

[0064] Excavation of the wellbore 6 and installation of the casing 61;

[0065] When the oil drilling rig drills a wellbore 6 in the formation using a drill bit, the worker first lowers the casing 61 into the wellbore 6, and then injects cement into the annulus area 62 between the wellbore 6 and the casing 61. After waiting for the cement setting time to end, the cement forms a cement column to support the wellbore 6 and prevent the wellbore 6 from collapsing, playing a role in well cementing.

[0066] Installation and positioning between this device and the casing 61;

[0067] After cement is injected into the annular space 62, the device can be placed inside the casing 61, and the driving assembly 2 is started to slide the sliding outer cylinder 4 downward outside the inner rod 3. Under the support and action of the shaking mechanism 34, the striking assembly 41 outside the sliding outer cylinder 4 slides downward and rotates, so that the striking assembly 41 is stretched open by the shaking mechanism 34 until it is tightly pressed against the inner wall of the casing 61, thereby completing the connection and positioning between the device and the casing 61.

[0068] Vibration operation between the shaking mechanism 34, the striking assembly 41 and the vibration assembly 5;

[0069] The vibration assembly 5 moves up and down in the placement cavity 33 of the inner rod, and is connected with the shaking mechanism 34 through the tooth plate 53, so that the shaking mechanism 34 can reciprocate on the side wall of the inner rod 3, thereby driving the striking assembly 41 at the execution end of the shaking mechanism 34, so that the striking assembly 41 can reciprocate and knock the inner wall of the casing 61, so that the casing 61 vibrates, thereby accelerating the flow of cement inside the annular area 62, and eliminating the gap of cement inside the accelerated annular area 62;

[0070] Cleaning operation between the cleaning mechanism 31 and the striking assembly 41;

[0071] When the striking assembly 41 completes the vibration reinforcement operation, the sliding outer cylinder 4 is driven in reverse by the driving assembly 2, so that the striking assembly 41 can be retracted through the shaking mechanism 34 and fit onto the outside of the inner rod 3, thereby reducing the overall footprint of the device; and when the striking rod 412 rotates and retracts, the striking rod 412 slides inside the cleaning sleeve 311, and the cleaning sleeve 311 is used to clean impurities and dust stuck on the striking rod 412.

[0072] The above embodiments describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. Cement slurry well cementing vibration device, characterized in that: It includes a fixed plate (1), a drive assembly (2), an inner rod (3), and a sliding outer cylinder (4). The inner rod (3) is fixedly installed at the bottom of the fixed plate (1). The sliding outer cylinder (4) is sleeved outside the inner rod (3). The drive assembly (2) is installed on the fixed plate (1), and the output end of the drive assembly (2) is fixedly connected to the top of the sliding outer cylinder (4). The drive assembly (2) can drive the sliding outer cylinder (4) to axially move along the outside of the inner rod (3). A placement cavity (33) is provided inside the inner rod (3). A vibration assembly (5) is installed inside the placement cavity (33). A plurality of connecting cylinders (32) are fixedly installed on the outer wall of the inner rod (3). The connecting cylinders (32) communicate with the placement cavity (33). A jitter mechanism (34) is slidably connected inside the connecting cylinder (32). The jitter mechanism (34) penetrates through the connecting cylinder (32) and its end is connected to a cleaning mechanism (31). The cleaning mechanism (31) is rotatably connected to the jitter mechanism (34). A striking assembly (41) is rotatably installed on the outer wall of the sliding outer cylinder (4). The striking assembly (41) passes through the cleaning mechanism (31) and can slide along it. The vibration assembly (5) can drive the jitter mechanism (34) to reciprocate radially, thereby driving the cleaning mechanism (31) to move, so that the striking assembly (41) reciprocally strikes the vibrating sleeve.

2. The cement slurry well cementing vibration device according to claim 1, wherein: The vibration assembly (5) includes an electric push rod (51), a mounting plate (52), and a toothed plate (53). The electric push rod (51) is fixedly installed at the top of the placement cavity (33). The output end of the electric push rod (51) is fixedly connected to the mounting plate (52). The mounting plate (52) is fixedly connected to the toothed plate (53). A plurality of annular convex portions (531) are formed at equal intervals on the outer wall of the toothed plate (53), and a concave portion (532) is formed between adjacent convex portions (531).

3. The cement slurry well cementing vibration device according to claim 2, characterized in that: The jitter mechanism (34) includes a push rod (341) and a spring (343). The push rod (341) passes through the connecting cylinder (32). A baffle (344) is fixedly installed at one end of the push rod (341) located outside the inner rod (3). The spring (343) is sleeved on the push rod (341), and its two ends are respectively fixedly connected to the connecting cylinder (32) and the baffle (344). An arc-shaped structure (342) is formed at one end of the push rod (341) close to the vibration assembly (5). The arc-shaped structure (342) can be engaged in the concave portion (532).

4. The cement slurry well cementing vibration device according to claim 3, characterized in that: The cleaning mechanism (31) includes a cleaning sleeve (311) and a scraping cylinder (312). The cleaning sleeve (311) is rotatably installed at the end of the push rod (341). The scraping cylinder (312) is fixedly installed on the cleaning sleeve (311). The striking assembly (41) passes through the cleaning sleeve (311) and the scraping cylinder (312) and can slide along them.

5. The cement slurry well cementing vibration device according to claim 4, characterized in that: The striking assembly (41) comprises a striking rod (412) and a steel ball (413); the striking rod (412) rotates through the cleaning sleeve (311) and the scraping cylinder (312); and the other end of the striking rod (412) is fixedly connected to the steel ball (413).

6. The cement slurry well cementing vibration device according to claim 4, characterized in that: The scraper barrel (312) is a truncated cone structure having a pointed end (3121) and a wide end (3122), and the wide end (3122) is located on a side close to the cleaning sleeve (311). The scraper barrel (312) is fixedly connected to the cleaning sleeve (311).

7. The cement slurry well cementing vibration device according to claim 5, characterized in that: A rubber pad (313) is installed on the surfaces of the cleaning sleeve (311) and the scraping cylinder (312) that contact the striking rod (412).

8. The cement slurry well cementing vibration device according to claim 3, characterized in that: A snap-fit ​​base (42) is fixedly mounted on the bottom of the sliding outer cylinder (4), and a snap-fit ​​cavity (421) adapted to the inner rod (3) is provided inside the snap-fit ​​base (42), and the bottom of the inner rod (3) is snap-fitted and fixedly mounted inside the snap-fit ​​cavity (421).

9. The cement slurry well cementing vibration device according to claim 8, wherein: A clamping groove (422) is provided inside the clamping cavity (421), and a clamping block (36) adapted to the clamping groove (422) is fixedly mounted on the side wall of the inner rod (3).

10. A method for using the cement slurry cementing vibration device according to any one of claims 1-9, characterized in that, The steps include: After cement is injected into the annular space (62) between the wellbore (6) and the casing (61), the device is placed inside the casing (61), the driving assembly (2) is operated, driving the sliding outer cylinder to slide downward relative to the inner rod (3), and the striking assembly (41) is stretched open by the shaking mechanism (34) until it is tightly pressed against the inner wall of the casing (61); The vibration component (5) moves up and down in the placement cavity (33) of the inner rod, and is connected to the shaking mechanism (34) through the tooth plate (53), so that the shaking mechanism (34) moves back and forth on the side wall of the inner rod (3), thereby driving the striking component (41), so that the striking component (41) strikes the inner wall of the casing (61) back and forth, causing the casing (61) to vibrate, thereby accelerating the flow of cement inside the annular area (62) and eliminating the gaps in the cement; When the vibration operation is completed, the sliding outer cylinder (4) is driven in the reverse direction by the driving assembly (2), causing the striking assembly (41) to contract, and during the contraction process, the striking rod (412) slides inside the cleaning mechanism (31) to clean the striking rod (412).

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