Ventable grouting device

Abstract

This utility model relates to the field of construction engineering, specifically to a ventable grouting device. The technical solution includes a cement head body with a side connection structure for connecting to a mud pipeline on its side wall and a lower connection structure for connecting to a wellhead drill pipe or casing short section at its bottom. The top of the cement head body is connected to an exhaust pipeline via a top exhaust pipe. The top exhaust pipe has a downward-opening U-shaped structure and is equipped with a gas flow velocity sensing component for sensing gas flow rate. This utility model features a simple structure, high safety and reliability, easy maintenance, long service life, timely gas discharge, and effective monitoring and alarm of exhaust flow rate.

Description

Technical Field

[0001] This utility model relates to a device in the field of construction engineering, specifically a grouting device with venting capability. Background Technology

[0002] Cement heads are a key cementing device used to inject replacement mud into the downhole annulus. Conventional cement heads require connections to multiple pipelines to perform operations such as circulation, injection of separator fluid, injection of cement slurry, release of rubber plugs, and mud replacement, resulting in a complex structure. Cement heads with only mud inlet and outlet allow downhole gases to escape directly from the head, causing mud splashing, polluting the surrounding environment, and hindering mud replacement operations.

[0003] To address the aforementioned technical problems, patent number CN201520860246.6 discloses a grouting device that discharges air from the drill string by setting an vent on the side wall of the drill string joint, thus preventing false overflow of drilling fluid caused by air. However, the following problems still exist: although setting an vent can discharge air, there is still a possibility that mud may splash out of the vent along with the air, polluting the surrounding environment. In particular, when grouting is too fast, the gas flow rate is too high. If it cannot be detected in time, mud from the vent may splash into the eyes and mouth of nearby workers, which are vulnerable parts of the human body, causing personal injury and other safety issues. Summary of the Invention

[0004] The purpose of this utility model is to solve the above-mentioned technical problems and provide a grouting device that is simple in structure, safe and reliable, easy to maintain, has a long service life, can timely discharge gas, effectively monitor the exhaust flow rate and alarm.

[0005] The present invention includes a cement head body, the side wall of which is equipped with a side connection structure for connecting a mud pipeline, and the bottom end is equipped with a lower connection structure for connecting a wellhead drill pipe or casing short section; the top of the cement head body is connected to an exhaust pipeline via a top exhaust pipe; the top exhaust pipe is a U-shaped structure with an opening facing downwards, and a gas flow rate sensing component for sensing gas flow rate is provided on the top exhaust pipe.

[0006] The side connection structure uses a union joint, and the lower connection structure uses a drill pipe thread or a casing thread.

[0007] A hand-operated lifting ring is also fixedly installed on the top exterior of the cement head body.

[0008] The exhaust pipe uses a crimped high-pressure hose.

[0009] The gas flow rate sensing component includes a self-rotating fan, a rotating rod, a mounting base, and a driven turntable. The mounting base is fixed to the side wall of the top exhaust pipe. The rotating rod is rotatably connected to the mounting base through a bearing. One end of the rotating rod extends into the top exhaust pipe and is fixedly installed with the self-rotating fan, while the other end extends out of the top exhaust pipe and is fixedly installed with the driven turntable.

[0010] It also includes an alarm component.

[0011] The alarm assembly includes a radially sliding conductive component mounted on a driven turntable, and an alarm electrically connected to the radially sliding conductive component, wherein the alarm may be an audible and / or visual alarm.

[0012] The radial sliding conductive component includes a conductive block, a conductive ring, and a spring. A guide groove is radially formed on the rotating disk, penetrating the periphery of the rotating disk. A spring is installed in the guide groove. The lower end of the spring is fixedly connected to the inner side of the guide groove, and the upper end is connected to the lower end of the conductive block located in the guide groove. The conductive ring is installed on the periphery of the rotating disk, maintaining a distance from the rotating disk 74.

[0013] The top exhaust pipe is provided with a housing on its outer side, the rotating disk is located inside the housing, and the conductive ring is fixed in the housing around the rotating disk.

[0014] The rotating disk is uniformly provided with multiple radially arranged guide grooves, as well as conductive blocks and springs located within the guide grooves. The spring force varies in different guide grooves, showing a progressively increasing trend. The alarm can have a built-in controller that receives different signals from the radially sliding conductive components, analyzes and compares them, and then issues alarm signals of different corresponding levels.

[0015] Beneficial effects: This structure is simple, easy to operate and maintain. The gas discharged from the well will be discharged in a timely manner through the top exhaust pipe and exhaust pipeline, achieving the effect of controlling the exhaust gas flow. It will not cause mud splashing and pollute the surrounding environment of the work site, which is conducive to the mud replacement operation.

[0016] A gas flow velocity sensor is installed on the top exhaust pipe to sense the gas flow rate. A self-rotating fan is driven to rotate by the airflow, which synchronously drives a driven turntable outside the top exhaust pipe via a rotating rod. By observing the rotation speed of the driven turntable, the gas flow rate inside the top exhaust pipe can be determined, achieving real-time monitoring. By monitoring changes in the gas flow rate inside the top exhaust pipe, pressure changes during the grouting process can be determined, preventing excessively rapid grouting and insufficient gas discharge, which could lead to various safety hazards caused by impacting the top exhaust pipe and exhaust pipeline. Compared to other electronic measuring equipment, the purely mechanical structure is more suitable for harsh grouting environments, effectively extending equipment lifespan and reducing maintenance and repair costs.

[0017] An alarm component is added. Based on the centrifugal force of rotation, a sliding conductive component is installed. The electrical signal output of the sliding conductive component is sent to the alarm to trigger an alarm. Further preferably, by utilizing the different spring forces within multiple guide grooves on the rotating disc, corresponding electrical signals can be emitted when the gas flow rate changes, achieving multi-level monitoring functionality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the ventable grouting device of this utility model; Figure 2 This is a diagram illustrating the installation of the hand-operated lifting ring; Figure 3 This is a schematic diagram of the top exhaust pipe structure; Figure 4 This is a schematic diagram of the installation of the gas flow rate sensing component; Figure 5 This is a schematic diagram of the alarm component installation.

[0019] The labels in the diagram represent: 1. Cement head body; 2. Side connection structure; 3. Lower connection structure; 4. Top exhaust pipe; 5. Exhaust line; 6. Hand-operated lifting ring; 7. Gas flow rate sensing component; 71. Self-rotating fan; 72. Rotating rod; 73. Mounting base; 74. Driven turntable; 8. Alarm component; 81. Conductive block; 82. Conductive ring; 83. Spring; 84. Alarm; 85. Guide groove; 9. Housing. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0022] Example 1, see Figure 1The cement head body 1 has a side connection structure 2 for connecting to the mud pipeline on its side wall. The side connection structure 2 uses a unibody joint, and the bottom end is equipped with a lower connection structure 3 for connecting to the wellhead drill pipe or casing short section. The lower connection structure 3 uses a drill pipe thread or casing thread. The top of the cement head body 1 is connected to the exhaust pipeline 5 via a top exhaust pipe 4. The top exhaust pipe 4 is a U-shaped structure with an opening facing downwards to reduce the impact force of the discharged gas and improve the service life of the exhaust pipeline 5. The exhaust pipeline 5 uses a crimp-type high-pressure hose, which not only has high pressure resistance, good flexibility and durability, but also facilitates installation and pipe laying operations. See also Figure 3 and Figure 4 The top exhaust pipe 4 is equipped with a gas flow rate sensing component 7 for sensing gas flow rate, see [link / reference]. Figure 2 A hand-pulled lifting ring 6 is also fixedly installed on the top of the cement head body 1 to facilitate the handling and use of the cement head body 1 at the work site.

[0023] Further, see Figure 4 The gas flow rate sensing component 7 can be any commercially available gas flow meter. However, given the harsh working environment of the grouting device, a mechanical structure is more suitable. This structure includes a self-rotating fan 71, a rotating rod 72, a mounting base 73, and a driven turntable 74. The mounting base 73 is fixed to the side wall of the top exhaust pipe 4. The rotating rod 72 is rotatably connected to the mounting base 73 via a bearing. One end of the rotating rod 72 extends into the top exhaust pipe 4 and is fixedly mounted with the self-rotating fan 71, while the other end extends out of the top exhaust pipe 4 and is fixedly mounted with the driven turntable 74. During grouting, gas is discharged through the top exhaust pipe 4 and exhaust line 5 at the top of the cement head body 1. When the gas flows through the top exhaust pipe 4, it drives the self-rotating fan 71 to rotate. The self-rotating fan 71 drives the driven turntable 74 to rotate synchronously via the rotating rod 72. The gas flow rate within the top exhaust pipe 4 can be determined by observing the rotation speed of the driven turntable 74. This purely mechanical structure is particularly suitable for working environments containing particulate matter.

[0024] As another example: It also includes an alarm component 8, which includes a radially sliding conductive component mounted on the driven turntable 74, and an alarm 84 electrically connected to the radially sliding conductive component. The alarm 84 can be an audible and / or visual alarm.

[0025] The radial sliding conductive component includes a conductive block 81, a conductive ring 82, and a spring 83. A guide groove 85 is radially formed on the rotating disk 74, penetrating the periphery of the rotating disk 74. The spring 83 is installed in the guide groove 85. The lower end of the spring 83 is fixedly connected to the inner side of the guide groove 85, and the upper end is connected to the lower end of the conductive block 81 located in the guide groove 85. A housing 9 is provided on the outer side of the top exhaust pipe 4. The conductive ring 82 is correspondingly installed on the housing 9 on the periphery of the rotating disk 74, maintaining a distance from the periphery of the rotating disk 74. Preferably, this distance should be less than the length of the conductive block 81 to prevent the conductive block 81 from coming out of the guide groove 85 under high-speed centrifugal conditions. The conductive block 81 can also be restricted to slide in the guide groove 85 by a limiting structure (such as a limiting strip). The specific limiting structure is prior art and will not be described in detail. When the self-rotating fan 71 drives the driven turntable 74 to rotate synchronously via the rotating rod 72, centrifugal force is generated after reaching a certain speed. The conductive block 75 overcomes the preload of the spring 83 and gradually slides towards the conductive ring 76. When the preset speed is reached, the conductive block 75 overcomes the elastic force of the spring 83 and contacts the conductive ring 76, thus generating an electrical signal and activating the alarm 84 to emit an audible and / or visual alarm. The alarm 84 can be installed on the housing 9 via a wired connection or wirelessly in the monitoring room; this is existing technology and will not be described in detail.

[0026] As another embodiment, see Figure 5 The rotating disk 74 is uniformly provided with multiple (five are shown in the figure) radially arranged guide grooves 85, and conductive blocks 81 and springs 83 located in the guide grooves 85. The elastic force of the springs 83 in different guide grooves 85 is different, showing a progressively increasing trend. The alarm 84 can have a built-in controller, which receives different signals from the radially sliding conductive components, analyzes and compares them, and then issues alarm signals of different corresponding levels. For example, when there are three conductive blocks 75 on the driven turntable 74, when the rotation speed of the driven turntable 74 reaches 1000 RPM, only one conductive block 75 is connected to the conductive ring 76. When the rotation speed of the driven turntable 74 reaches 1500 RPM, two conductive blocks 75 are connected to the conductive ring 76. When the rotation speed of the driven turntable 74 reaches 2000 RPM, all three conductive blocks 75 are connected to the conductive ring 76. The number of conductive blocks 75 that are connected to the conductive ring 76 generates a corresponding number of electrical signals, which are sent to the controller of the alarm 84. The controller analyzes and compares the received electrical signals. After reaching a set value, it issues different instructions to the speaker and / or alarm light according to the different numbers of received electrical signals, controlling the speaker and / or alarm light to emit corresponding levels of sound and / or light alarms to remind staff whether an abnormal phenomenon has occurred or what level of abnormal phenomenon it is, thereby realizing multi-level monitoring.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ventable grouting device, comprising a cement head body, characterized in that: The side wall of the cement head body is equipped with a side connection structure for connecting the mud pipeline, and the bottom end is equipped with a lower connection structure for connecting the wellhead drill pipe or casing short section; the top of the cement head body is connected to the exhaust pipeline via a top exhaust pipe; the top exhaust pipe is a U-shaped structure with an opening facing downwards, and the top exhaust pipe is equipped with a gas flow rate sensing component for sensing gas flow rate.

2. The ventable grouting device according to claim 1, characterized in that, The side connection structure uses a union joint, and the lower connection structure uses a drill pipe thread or a casing thread.

3. The ventable grouting device according to claim 1, characterized in that, A hand-operated lifting ring is also fixedly installed on the top exterior of the cement head body.

4. The ventable grouting device according to claim 1, characterized in that, The exhaust pipe uses a crimped high-pressure hose.

5. The ventable grouting device according to any one of claims 1-4, characterized in that, The gas flow rate sensing component includes a self-rotating fan, a rotating rod, a mounting base, and a driven turntable. The mounting base is fixed to the side wall of the top exhaust pipe. The rotating rod is rotatably connected to the mounting base through a bearing. One end of the rotating rod extends into the top exhaust pipe and is fixedly installed with the self-rotating fan, while the other end extends out of the top exhaust pipe and is fixedly installed with the driven turntable.

6. The ventable grouting device according to claim 5, characterized in that, It also includes an alarm component.

7. The ventable grouting device according to claim 6, characterized in that, The alarm assembly includes a radially sliding conductive component mounted on a driven turntable, and an alarm electrically connected to the radially sliding conductive component.

8. The ventable grouting device according to claim 7, characterized in that, The radial sliding conductive component includes a conductive block, a conductive ring, and a spring. A guide groove is radially formed on the driven turntable, penetrating the circumference of the driven turntable. A spring is installed in the guide groove, with its lower end fixedly connected to the inner side of the guide groove and its upper end connected to the lower end of the conductive block located in the guide groove. The conductive ring is correspondingly installed on the circumference of the driven turntable, maintaining a distance from the driven turntable.

9. The ventable grouting device according to claim 8, characterized in that, The top exhaust pipe is provided with a housing on its outer side, the driven turntable is located inside the housing, and the conductive ring is fixed in the housing around the driven turntable.

10. The ventable grouting device according to claim 8 or 9, characterized in that, The driven turntable is uniformly provided with multiple radially arranged guide grooves, as well as conductive blocks and springs located in the guide grooves. The spring force in different guide grooves is different, showing a trend of gradually increasing.

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