Well cementation vibration device

Abstract

The invention provides a well cementation vibration device. The well cementation vibration device comprises a sleeve, the sleeve is divided into a first sleeve body and a second sleeve body, at least one part of the second sleeve body extends into the first sleeve body, and a vibration structure is arranged in the sleeve; the distance adjusting structure is arranged in the sleeve, and the first sleeve and the second sleeve are connected in a distance adjustable mode through the distance adjusting structure; the outer wall of the sleeve is sleeved with the variable-diameter rubber sleeve, one end of the sleeve is covered with a first sealing cover, the other end of the sleeve is covered with a second sealing cover, and the two sides of the variable-diameter rubber sleeve are connected with the first sealing cover and the second sealing cover respectively; and the distance between the first sleeve and the second sleeve is adjusted through the distance adjusting structure so as to adjust the expansion and contraction of the variable-diameter rubber sleeve. The well cementation vibration device solves the problem that in the prior art, a well cementation vibration device is poor in annulus bubble eliminating effect.

Description

Technical Field

[0001] The invention relates to the technical field of underground mining equipment, and in particular to a cementing vibration device. Background Art

[0002] As oil and gas development moves towards deeper and more complex formations, higher requirements are placed on the quality of cement sheaths. The quality of cement sheath consolidation directly affects whether the oil, gas and water in the formation can be safely sealed. Conventional cementing operations use rubber plugs to displace cement slurry from the casing to the annulus, and rely on the cement slurry's own gravity to compact and solidify. Since air or formation fluid may be mixed into the cement slurry, a large number of bubbles exist in the cement sheath formed by consolidation, which seriously affects the cementing quality.

[0003] In order to eliminate bubbles in cement slurry in the annulus, researchers have proposed a cementing vibration device, which uses a vibration device to eliminate bubbles inside unconsolidated cement slurry during the cementing process, thereby improving cementing quality. This method has achieved certain application results in field tests of cementing construction. However, most of the cementing vibration devices currently used can only be fixed, that is, the vibration device is fixed at a certain position of the casing, mostly at the wellhead or the bottom of the well, and cannot vibrate the entire well section. Therefore, it can only eliminate annular bubbles near the vibration device and is not suitable for the entire well section.

[0004] That is to say, the cementing vibration device in the prior art has the problem of poor effect in eliminating annular air bubbles. Summary of the invention

[0005] The main purpose of the present invention is to provide a cementing vibration device to solve the problem that the cementing vibration device in the prior art has a poor effect in eliminating annular air bubbles.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a cementing vibration device, comprising: a sleeve, the sleeve is divided into a first sleeve and a second sleeve, at least a part of the second sleeve extends into the first sleeve, and a vibration structure is arranged in the sleeve; a distance adjustment structure, the distance adjustment structure is arranged in the sleeve, and the first sleeve and the second sleeve are connected with each other through the distance adjustment structure in an adjustable distance; a reducing rubber sleeve, the reducing rubber sleeve is sleeved on the outer wall of the sleeve, one end cover of the sleeve is provided with a first sealing cover, and the other end cover of the sleeve is provided with a second sealing cover, and the two sides of the reducing rubber sleeve are respectively connected with the first sealing cover and the second sealing cover, and the distance between the first sleeve and the second sleeve is adjusted by the distance adjustment structure to adjust the telescopic extension of the reducing rubber sleeve.

[0007] Furthermore, the reducer rubber sleeve has a stretched state and a compressed state. When the reducer rubber sleeve is in the compressed state, the cross section of the reducer rubber sleeve along its extending direction is in a broken line shape.

[0008] Furthermore, the distance adjustment structure includes a driving member and a screw. The driving member is fixed in the second sleeve. The driving member is drivingly connected to the screw. At least a portion of the screw away from the driving member is threadedly connected to the first sleeve. The screw is driven to rotate by the driving member, thereby adjusting the distance between the first sleeve and the second sleeve.

[0009] Furthermore, a fixing disk is arranged in the first sleeve, the fixing disk has a threaded hole, and at least a part of the screw rod is threadedly connected to the threaded hole.

[0010] Furthermore, the fixed plate also has a through hole, there are multiple through holes, and the multiple through holes are arranged at circumferential intervals around the threaded hole. The cementing vibration device also includes a directional rod, there are multiple directional rods, one end of the multiple directional rods is connected to the second sleeve, and the other ends of the multiple directional rods are arranged one by one through the multiple through holes.

[0011] Furthermore, one end of the directional rod away from the second sleeve has an anti-dropping flange.

[0012] Furthermore, a connecting plate is provided in the second sleeve, the connecting plate is parallel to the fixing plate, the driving member is arranged on the connecting plate and one end of a plurality of directional rods is fixedly connected to the connecting plate.

[0013] Furthermore, the vibration structure includes a vibration motor, a vibration cam and a vibration collection module, the vibration motor, the vibration cam and the vibration collection module are all arranged in the second sleeve, the vibration motor is connected to the vibration cam, and the vibration collection module is located on the side of the vibration cam away from the vibration motor.

[0014] Furthermore, the cementing vibration device also includes a sealing ring, and both sides of the reducer rubber sleeve are connected to the first sealing cover and the second sealing cover through a sealing ring respectively.

[0015] Further, the outer diameter of the first sleeve is equal to the outer diameter of the portion of the second sleeve that does not extend into the first sleeve; and / or the first sealing cover has a cable access port.

[0016] By applying the technical solution of the present invention, the cementing vibration device includes a sleeve, a distance adjustment structure and a reducer rubber sleeve, the sleeve is divided into a first sleeve and a second sleeve, at least a portion of the second sleeve extends into the first sleeve, and a vibration structure is arranged in the sleeve; the distance adjustment structure is arranged in the sleeve, and the first sleeve and the second sleeve are connected with each other through the distance adjustment structure in an adjustable distance; the reducer rubber sleeve is sleeved on the outer wall of the sleeve, one end cover of the sleeve is provided with a first sealing cover, and the other end cover of the sleeve is provided with a second sealing cover, and both sides of the reducer rubber sleeve are respectively connected with the first sealing cover and the second sealing cover, and the distance between the first sleeve and the second sleeve is adjusted through the distance adjustment structure to adjust the telescopic movement of the reducer rubber sleeve.

[0017] The present application adjusts the distance between the first sleeve and the second sleeve through the distance adjustment structure, thereby adjusting the expansion and contraction of the reducer rubber sleeve. In this way, in the process of lowering the cementing vibration device to the casing, the reducer rubber sleeve and the casing can be interference-fitted by changing the expansion and contraction of the reducer rubber sleeve, so that the cementing vibration device can be used together with the cementing cement plug to replace and isolate the cement slurry, and play a role in scraping and washing the residual cement slurry in the casing. By setting a vibration structure in the sleeve, when the cementing vibration device is sent to the bottom of the casing, as the operator moves the cementing vibration device from the bottom of the casing to the casing mouth, the distance adjustment structure can be used to adjust the gap of the reducer rubber sleeve during the upward movement, that is, to reduce the diameter of the reducer rubber sleeve, so that a certain gap is left between the reducer rubber sleeve and the inner wall of the casing, to avoid suction when lifting, and at the same time reduce the friction force when lifting. After lifting a certain distance, the reducer sleeve is adjusted to have an interference fit with the inner wall of the casing, so that the vibration structure can realize vibration of the entire well section, which is beneficial to eliminate annular air bubbles, improve cement slurry displacement efficiency, improve cement sheath strength, and ultimately achieve the purpose of improving cementing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of a cementing vibration device according to an optional embodiment of the present invention is shown.

[0020] The above drawings include the following reference numerals:

[0021] 11. First sleeve; 111. Fixed plate; 12. Second sleeve; 121. Connecting plate; 20. Variable-diameter rubber sleeve; 30. First sealing cover; 31. Cable access port; 40. Second sealing cover; 51. Driving member; 52. Screw; 60. Directional rod; 61. Anti-slip flange; 71. Vibration motor; 72. Vibration cam; 73. Vibration collection module; 80. Sealing ring. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0024] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0025] In order to solve the problem that the cementing vibration device in the prior art has a poor effect in eliminating annular bubbles, the present invention provides a cementing vibration device.

[0026] like Figure 1 As shown, the cementing vibration device includes a sleeve, a distance adjustment structure and a reducer rubber sleeve 20. The sleeve is divided into a first sleeve 11 and a second sleeve 12 along the height direction. At least a portion of the second sleeve 12 extends into the first sleeve 11, and a vibration structure is arranged in the sleeve; the distance adjustment structure is arranged in the sleeve, and the first sleeve 11 and the second sleeve 12 are connected with each other through the distance adjustment structure so that the distance can be adjusted; the reducer rubber sleeve 20 is sleeved on the outer wall of the sleeve, one end cover of the sleeve is provided with a first sealing cover 30, and the other end cover of the sleeve is provided with a second sealing cover 40, and the two sides of the reducer rubber sleeve 20 are respectively connected with the first sealing cover 30 and the second sealing cover 40, and the distance between the first sleeve 11 and the second sleeve 12 is adjusted by the distance adjustment structure to adjust the telescopic capacity of the reducer rubber sleeve 20.

[0027] The present application adjusts the distance between the first sleeve 11 and the second sleeve 12 through the distance adjustment structure, thereby adjusting the expansion and contraction of the reducer rubber sleeve 20. In this way, in the process of lowering the cementing vibration device to the casing, the reducer rubber sleeve 20 can be interference-fitted with the casing by changing the expansion and contraction of the reducer rubber sleeve 20, so that the cementing vibration device can be used together with the cementing cement plug to replace and isolate the cement slurry, and play a role in scraping and washing the residual cement slurry in the casing. By setting a vibration structure in the sleeve, when the cementing vibration device is sent to the bottom of the casing, as the operator moves the cementing vibration device from the bottom of the casing to the casing mouth, the gap of the reducer rubber sleeve 20 can be adjusted by the distance adjustment structure during the upward movement, that is, the diameter of the reducer rubber sleeve 20 is reduced, so that a certain gap is left between the reducer rubber sleeve 20 and the inner wall of the casing, so as to avoid suction when lifting, and at the same time reduce the friction force when lifting. After lifting a certain distance, the reducer rubber sleeve 20 is adjusted to have an interference fit with the inner wall of the casing, so that the vibration structure can realize the vibration of the entire well section, which is beneficial to eliminate annular air bubbles, improve cement slurry displacement efficiency, improve cement ring strength, and ultimately achieve the purpose of improving cementing quality.

[0028] Of course, the reducer rubber sleeve 20 of the present application is replaceable, and can be replaced with reducer rubber sleeves 20 of different sizes according to casings of different sizes, thereby realizing vibration cementing of casings of different sizes, expanding the scope of application, and being reusable, thereby reducing the cost of use. The reducer rubber sleeve 20 is made of flexible material.

[0029] It should be noted that the first sleeve 11 and the second sleeve 12 are arranged one above the other, so as to form a sleeve extending in one direction. The outer diameter of the first sleeve 11 is equal to the outer diameter of the portion of the second sleeve 12 that does not extend into the first sleeve 11; that is, when the distance between the first sleeve 11 and the second sleeve 12 is 0, the outer wall of the first sleeve 11 is flush with the outer wall of the second sleeve 12. The outer diameter of the portion of the second sleeve 12 extending into the first sleeve 11 matches the inner diameter of the portion of the first sleeve 11 corresponding thereto, so as to ensure the stability of the second sleeve 12 when it is extended into the first sleeve 11.

[0030] It should also be noted that the first sealing cover 30 has a cable access port 31. This arrangement facilitates the connection of the cable to the cable access port 31, and facilitates the subsequent up and down movement of the cementing vibration device in the casing through the cable. The cementing vibration device of the present application utilizes downhole cable pressure transmission operations to assist the rubber plug in replacing cement and vibrating the entire well section from bottom to top. It can also achieve full-well section vibration of any well type, adjust vibration parameters in real time and collect feedback to eliminate bubbles in cement slurry to the maximum extent, thereby improving cement slurry displacement efficiency and improving cementing quality. During the lowering process, the cementing vibration device of the present application is lowered into the well together with the cement slurry displacement rubber plug, and utilizes the reducer rubber sleeve 20 to have an interference fit with the inner wall of the casing to achieve the functions of replacing and isolating cement slurry and scraping residual cement slurry in the pipe.

[0031] Specifically, the reducer rubber sleeve 20 has a tension state and a compression state. When the distance adjustment structure increases the distance between the first sleeve 11 and the second sleeve 12, the reducer rubber sleeve 20 gradually changes from a compression state to a tension state; when the distance adjustment structure decreases the distance between the first sleeve 11 and the second sleeve 12, the reducer rubber sleeve 20 gradually changes from a tension state to a compression state. When the reducer rubber sleeve 20 is in a compression state, the cross section of the reducer rubber sleeve 20 along its extension direction is in a broken line shape.

[0032] like Figure 1As shown, the distance adjustment structure includes a driving member 51 and a screw 52. The driving member 51 is fixed in the second sleeve 12. The driving member 51 is connected to the screw 52 by driving. At least a portion of the screw 52 away from the driving member 51 is threadedly connected to the first sleeve 11. The driving member 51 drives the screw 52 to rotate, thereby adjusting the distance between the first sleeve 11 and the second sleeve 12. The screw 52 extends along the length direction of the first sleeve 11 and has a threaded section. At least the portion of the screw 52 away from the driving member 51 has a threaded section. Of course, the threaded section can also extend to both ends of the screw 52. A fixed disk 111 is provided in the first sleeve 11. The center of the fixed disk 111 has a threaded hole. At least a portion of the screw 52 away from the driving member 51 is threadedly connected to the threaded hole. In this way, the distance between the first sleeve 11 and the second sleeve 12 is adjusted by driving the screw 52 to rotate forward or reversely by the driving member 51, thereby achieving the adjustment of the telescopic adjustment of the variable diameter rubber sleeve 20.

[0033] Specifically, the fixing plate 111 also has a through hole, and there are multiple through holes, and the multiple through holes are arranged at intervals around the circumference of the threaded hole. The cementing vibration device also includes a directional rod 60, and there are multiple directional rods 60. One end of the multiple directional rods 60 is connected to the second sleeve 12, and the other ends of the multiple directional rods 60 are arranged through the multiple through holes in a one-to-one correspondence. This arrangement allows the directional rod 60 to play a guiding role. In the process of the driving member 51 driving the screw rod 52 to rotate to adjust the distance between the first sleeve 11 and the second sleeve 12, the directional rod 60 can ensure that there is no misalignment between the first sleeve 11 and the second sleeve 12, thereby ensuring structural stability.

[0034] Specifically, one end of the directional rod 60 away from the second sleeve 12 has an anti-dropping flange 61. The anti-dropping flange 61 is provided to prevent the risk of the directional rod 60 dropping out of the through hole, thereby ensuring the matching stability between the directional rod 60 and the through hole.

[0035] like Figure 1 As shown, the second sleeve 12 has a connecting plate 121, the connecting plate 121 is parallel to the fixed plate 111, the driving member 51 is arranged on the connecting plate 121, and one end of the plurality of directional rods 60 away from the through hole is fixedly connected to the connecting plate 121. The connection plate 121 is provided to facilitate the connection plate 121 to receive the driving member 51, and at the same time, to ensure the reliability of the use of the directional rods 60.

[0036] Specifically, the vibration structure includes a vibration motor 71, a vibration cam 72 and a vibration collection module 73. The vibration motor 71, the vibration cam 72 and the vibration collection module 73 are all arranged in the second sleeve 12. The vibration motor 71 is connected to the vibration cam 72, and the vibration collection module 73 is located on the side of the vibration cam 72 away from the vibration motor 71. The vibration collection module 73 and the vibration cam 72 are arranged at intervals. The vibration motor 71 is arranged on the surface of the side of the connecting plate 121 away from the driving member 51. The vibration motor 71 is driven by electricity to rotate, thereby driving the vibration cam 72 to rotate. Since the vibration cam 72 is an eccentric cam, a vibration effect is generated during the rotation process. The use of electric drive has the characteristics of stable and reliable performance and easy adjustment of vibration parameters. The built-in vibration collection module 73 collects real-time vibration data of the entire well section, combined with cementing quality evaluation, to provide a basis for continuous optimization of vibration parameters in the later stage.

[0037] Specifically, the cementing vibration device further includes a sealing ring 80, and the two sides of the reducer rubber sleeve 20 are respectively connected to the first sealing cover 30 and the second sealing cover 40 through a sealing ring 80. That is to say, after the two sides of the reducer rubber sleeve 20 are respectively matched with the first sealing cover 30 and the second sealing cover 40, the sealing ring 80 is used to achieve the sealing connection between the two. This arrangement is conducive to ensuring the sealing of the sleeve, and at the same time, it can ensure the connection strength between the two sides of the reducer rubber sleeve 20 and the first sealing cover 30 and the second sealing cover 40. In addition, a sealing ring 80 is also provided between the first sleeve 11 and the second sleeve 12.

[0038] The cementing vibration device of the present application drives the screw 52 to rotate through the driving member 51, thereby realizing the relative movement between the first sleeve 11 and the second sleeve 12 under the cooperation of the directional rod 60 and the fixed plate 111, thereby driving the variable diameter rubber sleeve 20 to stretch and compress, achieving the variable diameter effect of the variable diameter rubber sleeve 20, and cooperating with the cable pressure operation to realize the cementing vibration device from the wellhead to the bottom of the well.

[0039] The first sealing cover 30 is connected to the cable to realize the functions of power transmission and traction and lifting. During the process of entering the well, the reducer sleeve 20 is adjusted to have an interference fit with the casing and is lowered into the well together with the cement plug until the well wall hits and the lowering stops. During the lowering process, it plays a role in displacing and isolating cement slurry and scraping and washing the residual cement slurry in the casing.

[0040] In order to ensure the cementing quality and efficiency of the cementing vibration device during the lifting operation from the bottom of the well, the vibration cementing mode is turned on every time the lifting is done for a certain distance. When lifting, the reducer rubber sleeve 20 is stretched to reduce the diameter to avoid suction and reduce friction resistance. When vibrating, the reducer rubber sleeve 20 is compressed again to achieve interference fit and improve vibration efficiency. Repeat the lifting and vibration operation from the bottom of the well to achieve full-well section vibration cementing. At the same time, the built-in vibration collection module 73 is turned on during the vibration process to collect real-time vibration data of the entire well section, and combined with cementing quality evaluation, it provides a basis for continuous optimization of vibration parameters in the later stage.

[0041] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cementing vibration device, characterized in that: include: A sleeve, the sleeve being divided into a first sleeve (11) and a second sleeve (12), at least a portion of the second sleeve (12) extending into the first sleeve (11), and a vibration structure being arranged in the sleeve; a distance adjustment structure, the distance adjustment structure being arranged in the sleeve, the first sleeve (11) and the second sleeve (12) being connected in an adjustable distance via the distance adjustment structure; A reducing rubber sleeve (20), wherein the reducing rubber sleeve (20) is sleeved on the outer wall of the sleeve, one end cover of the sleeve is provided with a first sealing cover (30), and the other end cover of the sleeve is provided with a second sealing cover (40), and the two sides of the reducing rubber sleeve (20) are respectively connected to the first sealing cover (30) and the second sealing cover (40), and the distance between the first sleeve (11) and the second sleeve (12) is adjusted by the distance adjustment structure, thereby adjusting the telescopic capacity of the reducing rubber sleeve (20).

2. The cementing vibration device according to claim 1, characterized in that: The variable diameter rubber sleeve (20) has a stretched state and a compressed state. When the variable diameter rubber sleeve (20) is in the compressed state, the cross section of the variable diameter rubber sleeve (20) along its extension direction is in a broken line shape.

3. The cementing vibration device according to claim 1, characterized in that: The distance adjustment structure comprises a driving member (51) and a screw rod (52); the driving member (51) is fixed in the second sleeve (12); the driving member (51) is drivingly connected to the screw rod (52); at least a portion of the screw rod (52) away from the driving member (51) is threadedly connected to the first sleeve (11); the driving member (51) drives the screw rod (52) to rotate, thereby adjusting the distance between the first sleeve (11) and the second sleeve (12).

4. The cementing vibration device according to claim 3, characterized in that: A fixing disk (111) is arranged in the first sleeve (11), the fixing disk (111) having a threaded hole, and at least a portion of the screw rod (52) is threadedly connected to the threaded hole.

5. The cementing vibration device according to claim 4, characterized in that: The fixed plate (111) also has a through hole, and there are multiple through holes. The multiple through holes are arranged at circumferential intervals around the threaded hole. The cementing vibration device also includes a directional rod (60), and there are multiple directional rods (60). One end of the multiple directional rods (60) is connected to the second sleeve (12), and the other ends of the multiple directional rods (60) are arranged to pass through the multiple through holes in a one-to-one correspondence.

6. The cementing vibration device according to claim 5, characterized in that: The end of the directional rod (60) away from the second sleeve (12) has an anti-drop flange (61).

7. The cementing vibration device according to claim 5, characterized in that: The second sleeve (12) has a connecting plate (121) therein, the connecting plate (121) is parallel to the fixed disk (111), the driving member (51) is arranged on the connecting plate (121) and one end of a plurality of directional rods (60) is fixedly connected to the connecting plate (121).

8. The cementing vibration device according to claim 1, characterized in that: The vibration structure comprises a vibration motor (71), a vibration cam (72) and a vibration collection module (73); the vibration motor (71), the vibration cam (72) and the vibration collection module (73) are all arranged in the second sleeve (12); the vibration motor (71) is connected to the vibration cam (72), and the vibration collection module (73) is located on a side of the vibration cam (72) away from the vibration motor (71).

9. The cementing vibration device according to claim 1, characterized in that: The cementing vibration device also includes a sealing ring (80), and the two sides of the reducer rubber sleeve (20) are respectively connected to the first sealing cover (30) and the second sealing cover (40) via a sealing ring (80).

10. The cementing vibration device according to any one of claims 1 to 9, characterized in that: The outer diameter of the first sleeve (11) is equal to the outer diameter of the portion of the second sleeve (12) that does not extend into the first sleeve (11); and / or the first sealing cover (30) has a cable access port (31).

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