A uniform flow cementing device for annular grouting

Abstract

This invention provides a uniformly distributed cementing device for annular grouting, comprising a housing, a check valve assembly, and a diverter assembly. One end of the housing is fixedly connected to one end of a cement slurry delivery pipeline. The check valve assembly is slidably connected inside the housing and located within an internal cavity. The diverter assembly is slidably connected to the other end of the housing and is located below the check valve assembly. This uniformly distributed cementing device for annular grouting can evenly distribute cement slurry into the annular space, improving cementing quality, reducing manual labor, lowering costs, and increasing work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas extraction and underground engineering construction equipment, and in particular relates to an annular grouting uniform flow cementing device. Background Technology

[0002] Annular grouting uniform flow cementing devices are mainly used in cementing operations for oil and gas drilling or underground engineering. Their core objective is to optimize the flow and distribution of cement slurry in the annular space between the casing and the wellbore, ensuring that the cement slurry can uniformly and efficiently displace the drilling fluid in the annulus, forming a dense and stable cement sheath. In traditional cementing processes, the flow of cement slurry in the annulus is often unevenly distributed, resulting in localized channeling or low displacement efficiency due to factors such as wellbore irregularities, casing eccentricity, and differences in drilling fluid properties. This leads to wasted manpower and resources and low safety. Utility Model Content

[0003] In view of this, the present invention aims to propose an annular grouting uniform flow cementing device to solve the problems of uneven distribution, local channeling or low displacement efficiency caused by factors such as differences in drilling fluid properties, resulting in waste of manpower and resources and low safety.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A uniform flow-diverting cementing device for annular grouting includes a shell, a check valve assembly, a flow-diverting assembly, and a flow-limiting assembly. One end of the shell is fixedly connected to one end of a cement slurry delivery pipeline. The check valve assembly is provided inside the shell and is slidably connected in the internal cavity of the shell. The inner ring of the other end of the shell is slidably connected to the periphery of the flow-diverting assembly, and the flow-diverting assembly is located below the check valve assembly. A flow-limiting assembly is provided on the periphery of one end of the flow-diverting assembly.

[0006] Furthermore, the shell is a tubular structure with both ends connected. The upper inner wall of the shell is provided with threads for connecting to a cement slurry delivery pipeline. The shell is provided with a first step, a second step, and a third step, which are distributed along the axial direction of the shell. The first step and the second step are used to separate the first cavity and the second cavity. The lower inner wall of the shell is provided with a groove.

[0007] Furthermore, the anti-reverse assembly includes a float, a connecting rod, a first connecting bracket, and a second connecting bracket. The float is a hemispherical structure, with its spherical surface contacting the second step. The float is used to seal the connection between the first cavity and the second cavity. The lower end of the float is fixedly connected to one end of the connecting rod. The outer periphery of the connecting rod is slidably connected to the first connecting bracket. The outer periphery of the first connecting bracket is fixedly connected to the third step. The other end of the connecting rod is fixedly connected to the second connecting bracket, which is located below the first connecting bracket. The second connecting bracket is used to define the relative position of the diversion assembly.

[0008] Furthermore, the anti-reverse assembly also includes a spring, which is disposed around the periphery of the connecting rod, and the two ends of the spring are respectively fixedly connected to the float and the first connecting bracket. The spring is used for the elastic reset of the float.

[0009] Furthermore, the diversion assembly includes a diversion barrel, a diversion hole, a diversion plate, and a slider. One end of the diversion barrel is fixedly connected to the second connecting bracket. The slider is fixedly installed on the periphery of the diversion barrel and is slidably connected in the groove. The slider is used to limit the displacement trajectory of the diversion barrel. The diversion hole is provided through the side wall of the diversion barrel and has an arc-shaped structure. The diversion hole is used to transport the cement slurry in the diversion barrel to the annular structure. The diversion plate is provided on the inner wall of the diversion barrel and has a spiral structure. The diversion plate is used to transport the cement slurry into the diversion hole.

[0010] Furthermore, the flow limiting component includes a baffle and a spring plate. The baffle is disposed on the periphery of the flow guide barrel and abuts against one end of the flow guide hole. One side wall of the baffle is fixedly connected to one end of the spring plate, and the other end of the spring plate is fixedly connected to the periphery of the flow guide barrel. The spring plate is used to limit the displacement trajectory of the baffle.

[0011] Compared with the prior art, the annular grouting uniform flow cementing device of this utility model has the following beneficial effects:

[0012] (1) The annular grouting uniform flow cementing device of this utility model is equipped with a backflow prevention component, which can effectively prevent cement slurry from flowing backward in the pipeline, avoid backflow caused by pressure changes or pump station shutdown, and improve the stability of equipment operation and production safety.

[0013] (2) The annular grouting uniform flow cementing device of this utility model is equipped with a guide plate to accurately transport cement slurry into the cement pipe, thereby increasing the continuity of work and improving work efficiency.

[0014] (3) The annular grouting uniform flow cementing device of this utility model is provided with an arc-shaped guide hole, through which cement slurry enters the annular space evenly, thereby improving cementing quality and work efficiency.

[0015] (4) The annular grouting uniform flow cementing device of this utility model is equipped with a flow limiting component. Through the pressure change of the spring and the annular space, the opening and closing effect of the baffle changes, thereby realizing adaptive adjustment to the changes in the annular space, improving work efficiency and work safety. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0017] Figure 1 This is a cross-sectional schematic diagram of the overall structure of an annular grouting uniform flow cementing device according to an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the housing described in an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the anti-reverse component described in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the current splitter component described in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the current limiting component described in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-Shell; 11-Thread; 12-First step; 13-Second step; 14-Third step; 15-First cavity; 16-Second cavity; 17-Slide groove; 2-Anti-reverse assembly; 21-Float; 22-Connecting rod; 23-First connecting bracket; 24-Second connecting bracket; 25-Spring; 3-Flow diversion assembly; 31-Flow guide barrel; 32-Flow guide hole; 33-Flow guide plate; 34-Slider; 4-Flow limiting assembly; 41-Baffle; 42-Spring piece. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 As shown, an annular grouting uniform flow cementing device is characterized by comprising a shell 1, a check valve assembly 2, a flow diversion assembly 3, and a flow limiting assembly 4. One end of the shell 1 is fixedly connected to one end of the cement slurry delivery pipeline. The check valve assembly 2 is provided inside the shell 1 and is slidably connected in the internal cavity of the shell 1. The inner ring of the other end of the shell 1 is slidably connected to the periphery of the flow diversion assembly 3, and the flow diversion assembly 3 is located below the check valve assembly 2. A flow limiting assembly 4 is provided on the periphery of one end of the flow diversion assembly 3. The flow diversion assembly 3 and the flow limiting assembly 4 are provided to ensure that the cement slurry is evenly distributed in the annular space, thereby increasing the cementing quality and improving the working efficiency.

[0029] like Figure 2As shown, the housing 1 is a tubular structure with both ends open. The upper inner wall of the housing 1 is provided with a thread 11 for connecting to a cement slurry delivery pipeline. The housing 1 is provided with a first step 12, a second step 13 and a third step 14, which are distributed along the axial direction of the housing 1. The first step 12 and the second step 13 are used to separate the first cavity 15 and the second cavity 16. The lower inner wall of the housing 1 is provided with a groove 17. The first step 12 and the second step 13 separate the first cavity 15 and the second cavity 16. The third step 14 facilitates the entry of cement slurry into the diversion component, increases the continuity of cement slurry flow, and improves working efficiency.

[0030] like Figure 3 As shown, the anti-reverse assembly 2 includes a float 21, a connecting rod 22, a first connecting bracket 23, and a second connecting bracket 24. The float 21 is a hemispherical structure, and the spherical surface of the float 21 abuts against the second step 13. The float 21 is used to close the communication between the first cavity 15 and the second cavity 16. The lower end of the float 21 is fixedly connected to one end of the connecting rod 22. The outer periphery of the connecting rod 22 is slidably connected to the first connecting bracket 23. The outer periphery of the first connecting bracket 23 is fixedly connected to the third step 14. The other end of the connecting rod 22 is fixedly connected to the second connecting bracket 24, and the second connecting bracket 24 is located below the first connecting bracket 23. The second connecting bracket 24 is used to limit the relative position of the diversion assembly 3.

[0031] like Figure 3 As shown, the anti-reverse assembly 2 also includes a spring 25. The spring 25 is disposed around the connecting rod 22, and the two ends of the spring 25 are respectively fixedly connected to the float 21 and the first connecting bracket 23. The spring 25 is used for the elastic reset of the float 21. The float 21 is set to separate the first cavity 15 and the second cavity 16 under normal conditions, preventing cement slurry from flowing back from the second cavity 16 into the first cavity 15, avoiding backflow caused by pressure changes or pump station shutdown, increasing work safety and improving work efficiency.

[0032] like Figure 4 As shown, the diversion assembly 3 includes a diversion barrel 31, a diversion hole 32, a diversion plate 33, and a slider 34. One end of the diversion barrel 31 is fixedly connected to the second connecting bracket 24. The slider 34 is fixedly installed on the periphery of the diversion barrel 31 and is slidably connected in the groove 17. The slider 34 is used to limit the displacement trajectory of the diversion barrel 31. The diversion hole 32 is provided through the side wall of the diversion barrel 31 and has an arc-shaped structure. The diversion hole 32 is used to transport the cement slurry in the diversion barrel 31 to the annular structure. The inner wall of the diversion barrel 31 is provided with a diversion plate 33, which has a spiral structure. The diversion plate 33 is used to transport the cement slurry into the diversion hole 32. By setting the diversion plate and the diversion hole, the cement slurry is accurately delivered to the designated position, improving work efficiency and reducing manual labor.

[0033] like Figure 5 As shown, the flow limiting component 4 includes a baffle 41 and a spring plate 42. The baffle 41 is disposed on the periphery of the flow guide barrel 31 and abuts against one end of the flow guide hole 32. One side wall of the baffle 41 is fixedly connected to one end of the spring plate 42, and the other end of the spring plate 42 is fixedly connected to the periphery of the flow guide barrel 31. The spring plate 42 is used to limit the displacement trajectory of the baffle 41. By setting the baffle 41 and the spring plate 42, the flow rate of the cement slurry can be adaptively adjusted according to the annular resistance, which facilitates the uniform distribution of cement slurry, improves cementing quality, and enhances work efficiency and safety.

[0034] The working process of an annular grouting uniform flow cementing device:

[0035] The device is connected to one end of the cement slurry delivery pipeline and placed at the designated location to deliver cement slurry into the pipeline. When the cement slurry reaches the first step 12 of the housing 1, it enters the first cavity 15 and pushes the float 21, which is in contact with the second step 13, into the second cavity 16. At this time, the first cavity 15 and the second cavity 16 are connected, and the cement slurry in the first cavity 15 flows to the second cavity 16. At the same time, the float 21 moves downward, driving the guide barrel 31 to move downward. The guide hole 32 extends from the housing 1 into the annular space, and the cement slurry flows from the second cavity 16 to the annular space. The flow limiting component 4 adjusts the opening size of the guide hole 32 according to the change of annular resistance, thereby adjusting the flow rate of the cement slurry and ensuring that the flow rate of the cement slurry on each diversion path is basically the same, so as to achieve uniform diversion of the return hole grouting and complete the cementing work.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A uniformly distributed cementing device for annular grouting, characterized in that: It includes a housing (1), a backflow preventer (2), a flow diversion assembly (3) and a flow limiting assembly (4). One end of the housing (1) is fixedly connected to one end of the cement slurry conveying pipeline. The housing (1) is provided with a backflow preventer (2), and the backflow preventer (2) is slidably connected in the internal cavity of the housing (1). The inner ring of the other end of the housing (1) is slidably connected to the periphery of the flow diversion assembly (3), and the flow diversion assembly (3) is located below the backflow preventer (2). One end of the flow diversion assembly (3) is provided with a flow limiting assembly (4).

2. The annular grouting uniform flow cementing device according to claim 1, characterized in that: The shell (1) is a tubular structure with both ends open. The upper inner wall of the shell (1) is provided with a thread (11). The thread (11) is used to connect to the cement slurry conveying pipeline. The shell (1) is provided with a first step (12), a second step (13) and a third step (14). The first step (12), the second step (13) and the third step (14) are distributed along the axial direction of the shell (1). The first step (12) and the second step (13) are used to separate the first cavity (15) and the second cavity (16). The lower inner wall of the shell (1) is provided with a groove (17).

3. The annular grouting uniform flow cementing device according to claim 1, characterized in that: The anti-reverse assembly (2) includes a float (21), a connecting rod (22), a first connecting bracket (23), and a second connecting bracket (24). The float (21) is a hemispherical structure. The spherical surface of the float (21) contacts the second step (13). The float (21) is used to close the communication between the first cavity (15) and the second cavity (16). The lower end of the float (21) is fixedly connected to one end of the connecting rod (22). The outer periphery of the connecting rod (22) is slidably connected to the first connecting bracket (23). The outer periphery of the first connecting bracket (23) is fixedly connected to the third step (14). The other end of the connecting rod (22) is fixedly connected to the second connecting bracket (24), and the second connecting bracket (24) is located below the first connecting bracket (23). The second connecting bracket (24) is used to limit the relative position of the diversion assembly (3).

4. The annular grouting uniform flow cementing device according to claim 3, characterized in that: The anti-reverse assembly (2) also includes a spring (25), which is located on the periphery of the connecting rod (22), and the two ends of the spring (25) are respectively fixedly connected to the float (21) and the first connecting bracket (23). The spring (25) is used for the elastic reset of the float (21).

5. The annular grouting uniform flow cementing device according to claim 2, characterized in that: The diversion assembly (3) includes a diversion bucket (31), a diversion plate (33), and a slider (34). One end of the diversion bucket (31) is fixedly connected to the second connecting bracket (24). The slider (34) is fixedly installed on the periphery of the diversion bucket (31), and the slider (34) is slidably connected in the groove (17). The slider (34) is used to limit the displacement trajectory of the diversion bucket (31). The side wall of the diversion bucket (31) is provided with a through-hole (32), and the diversion hole (32) is an arc-shaped structure. The diversion hole (32) is used to transport the cement slurry in the diversion bucket (31) to the annular structure. The inner wall of the diversion bucket (31) is provided with a diversion plate (33), and the diversion plate (33) is a spiral structure. The diversion plate (33) is used to transport the cement slurry into the diversion hole (32).

6. The annular grouting uniform flow cementing device according to claim 1, characterized in that: The flow limiting component (4) includes a baffle (41) and a spring (42). The baffle (41) is disposed on the periphery of the flow guide barrel (31) and the baffle (41) abuts against one end of the flow guide hole (32). One side wall of the baffle (41) is fixedly connected to one end of the spring (42), and the other end of the spring (42) is fixedly connected to the periphery of the flow guide barrel (31). The spring (42) is used to limit the displacement trajectory of the baffle (41).

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