Cement head rubber plug drop indicator

Abstract

The utility model relates to a cement head rubber plug falling indicator, including crashproof cover, support, monitoring lever, pivot, elastic reset piece, trigger detection subassembly and counting component, the support can be installed in the casing joint of cement head, and the crashproof cover is installed in the support, the pivot rotatably is established in the support, and the monitoring lever, signal trigger subassembly and counting component are connected in the pivot, and the elastic reset piece is arranged between signal trigger subassembly and the support and between counting component and the support, signal trigger subassembly can be connected signal receiving module, the free end of monitoring lever can be worn into the casing joint, and when cementing plug falls along casing joint, can abut and drive monitoring lever to rotate, and monitoring lever rotation drives pivot to rotate, and pivot rotation can trigger signal trigger subassembly, and pivot rotation can drive counting component rotation simultaneously and realize counting, its beneficial effect is, in the promotion monitoring accuracy and reliability, and the adaptability of bad well site environment and the stability of continuous operation are taken into account.

Description

Technical Field

[0001] This utility model relates to the field of modular building technology, and in particular to a cement head rubber plug falling indicator. Background Technology

[0002] In oil and gas field cementing operations, the descent status of the cement plug is a key indicator for judging the cement slurry displacement efficiency and ensuring the sealing quality. When the cement plug descends, it is necessary to accurately monitor the time it takes to pass through the casing joint to avoid cement slurry leakage or substandard sealing caused by plug jamming or abnormal descent.

[0003] Currently, the traditional method for determining whether a rubber stopper has fallen is that technicians can only make a preliminary judgment by touching the bottom of the cement head. However, this is difficult to accurately determine in situations with high noise levels and thick cement heads. Rubber stopper falling indicators have been designed, mainly of two types: magnetic induction and proximity switch. Magnetic induction indicators (such as CN201991523U) require embedding a magnetic body inside the rubber stopper and using a Hall sensor to detect changes in the magnetic field to determine whether the stopper has fallen. However, this relies on special modifications to the rubber stopper, increasing material costs, and the magnetic field is easily interfered with by ferromagnetic casing and drilling fluid impurities, leading to signal distortion. Proximity switch indicators (such as CN2627205Y), although using a non-contact triggering electrical signal, mostly determine whether the stopper has fallen by detecting the opening and closing state of a stop pin or similar mechanism. The triggering component lacks direct linkage with the falling process, making it prone to signal delay or false triggering due to mechanism jamming, and it cannot directly reflect the actual state of the stopper passing through the casing joint.

[0004] Therefore, there is an urgent need for a cement head plug drop indicator with high monitoring accuracy. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a cement head rubber stopper falling indicator, which solves the technical problem of poor accuracy in monitoring the falling of rubber stoppers in the prior art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] This utility model provides a cement head plug falling indicator, including a crash shield, a bracket, a monitoring lever, a rotating shaft, an elastic reset component, a trigger detection component, and a counting component. The bracket can be installed on the casing joint of the cement head, and the crash shield is installed on the bracket. The rotating shaft is rotatably mounted on the bracket, and the monitoring lever, the signal trigger component, and the counting component are connected to the rotating shaft. Elastic reset components are provided between the signal trigger component and the bracket, and between the counting component and the bracket. The signal trigger component can be connected to a signal receiving module. The free end of the monitoring lever can be inserted into the casing joint. When the cement plug falls along the casing joint, it can abut against and drive the monitoring lever to rotate. The rotation of the monitoring lever drives the rotating shaft to rotate, and the rotation of the rotating shaft can trigger the signal trigger component. The rotation of the rotating shaft can also drive the counting component to rotate to achieve counting.

[0010] Optionally, the signal triggering component includes a switch baffle and a proximity switch; the switch baffle is mounted on a rotating shaft, and the proximity switch is mounted on a bracket; a resilient reset element is disposed between the switch baffle and the bracket; the proximity switch can be connected to a signal receiving module; the switch baffle has a trigger portion; in the standby state, the trigger end of the proximity switch faces the trigger portion of the switch baffle; when the monitoring lever rotates, it can drive the switch baffle to rotate so that the trigger portion moves away from the proximity switch through the rotating shaft, causing the switch to change signal.

[0011] Optionally, the switch baffle and the rotating shaft are detachably connected by a first connecting pin.

[0012] Optionally, the counting assembly includes a one-way bearing, a counting sleeve, and a zeroing assembly; the counting sleeve is mounted on the rotating shaft via the one-way bearing; the zeroing assembly is disposed on the rotating shaft; the elastic reset component is disposed between the zeroing assembly and the bracket; when the rotating shaft rotates, the counting sleeve is driven to rotate at a fixed angle via the one-way bearing to achieve counting; the zeroing assembly enables the rotating shaft to rotate, and the rotation of the rotating shaft drives the counting bearing to reset via the one-way bearing.

[0013] Optionally, the zeroing component includes a zeroing baffle and a zeroing lever; the zeroing lever is mounted on the rotating shaft via the zeroing baffle; rotating the zeroing lever can drive the rotating shaft to rotate.

[0014] Optionally, the zeroing baffle and the rotating shaft are detachably connected by a second connecting pin.

[0015] Optionally, the bracket includes a support and a base plate; the support is disposed on the base plate, the anti-collision cover is installed on the support, the rotating shaft is rotatably installed on the support, a blind hole is provided in the middle of the support, the monitoring lever is located in the blind hole and installed on the rotating shaft, and the free end of the monitoring lever extends out from the opening of the blind hole.

[0016] Optionally, the support is provided with a mounting through hole communicating with the blind hole, and the mounting through hole extends through the anti-collision cover. A plug is provided inside the mounting through hole, and a protective cover is provided at the opening of the mounting through hole on the outside of the anti-collision cover.

[0017] Optionally, the elastic reset element is a reset spring.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a cement plug drop indicator, in which the monitoring lever is directly inserted into the casing joint. When the cement plug drops, the lever rotates through physical contact, eliminating the need for a magnetic body embedded in the plug as required by magnetic induction indicators. This reduces the special requirements for the plug, making it compatible with various standard plugs. It also avoids signal distortion caused by magnetic field interference, ensuring a direct correlation between monitoring and the actual drop status of the plug, thus improving detection accuracy. The trigger detection component and the counting component are coaxially connected to the rotating shaft, forming a dual system of mechanical counting and remote electronic counting. When the cement plug passes through, the rotating shaft rotates, simultaneously triggering both components. The trigger detection component outputs an electrical signal to achieve remote real-time counting, meeting the needs of intelligent monitoring. Through mechanical physical counting by the counting component, even in the event of electronic system failure, the number of passes can still be read by observing the mechanical status. This is particularly suitable for the traceability needs of the two plugs in dual-plug operations, solving the failure risk of traditional single electronic counting. The anti-collision cover and bracket form a closed protective space, enclosing core components such as the rotating shaft and trigger detection components. This effectively prevents mud splashes, dust intrusion, and accidental collisions at the well site, avoiding component damage caused by the lack of protection in traditional proximity switch indicators. Simultaneously, the stable connection between the bracket and the casing joint reduces the impact of vibration on the rotating shaft's rotational accuracy, ensuring stable operation of the trigger detection and counting components and extending equipment lifespan. Elastic reset components are installed between the signal trigger component and the bracket, and between the counting component and the bracket, forming a double elastic buffer: when the cement plug passes through, the elastic reset component can quickly return the rotating shaft, monitoring lever, and other components to their original positions, awaiting the next trigger. All components are integrated and assembled via the rotating shaft and bracket. The monitoring lever, trigger detection component, and counting component form a linked whole around the rotating shaft, reducing assembly errors in traditional distributed structures and ensuring synchronized operation. Furthermore, the modular design allows for easy deployment by simply fixing the bracket to the casing joint during installation, improving the convenience of on-site operations. Compared to existing technologies, this design, through direct contact monitoring, dual counting redundancy, and integrated protection reset, solves the problems of dependence on rubber plugs and magnetic field interference in magnetic induction, while also overcoming the shortcomings of indirect triggering and single counting in proximity switch-type technologies. It improves the accuracy and reliability of monitoring while taking into account the adaptability to harsh well site environments and the stability of continuous operation, providing a more efficient and reliable solution for monitoring the falling status of cement plugs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a cement head rubber plug falling indicator according to Embodiment 1 of this utility model;

[0022] Figure 2 This is a cross-sectional schematic diagram of a cement head plug drop indicator according to Embodiment 1 of this utility model;

[0023] Figure 3 This is a schematic diagram of a cement head rubber plug falling indicator installed on a sleeve joint according to Embodiment 1 of this utility model;

[0024] Figure 4 This is a bottom view of a cement head plug drop indicator according to Embodiment 1 of this utility model;

[0025] Figure 5 This is a rear view of a cement head plug drop indicator according to Embodiment 1 of this utility model;

[0026] Figure 6 This is a side view of a cement head plug falling indicator according to Embodiment 1 of this utility model.

[0027] [Explanation of Labels in the Attached Image]

[0028] 1: Anti-collision cover; 2: Bracket; 21: Support; 22: Base plate; 23: End cap; 24: Protective cover; 3: Monitoring lever; 4: Rotating shaft; 5: Elastic reset component; 61: Switch baffle; 62: Proximity switch; 63: First connecting pin; 71: One-way bearing; 72: Counting bushing; 73: Zeroing baffle; 74: Zeroing lever; 75: Second connecting pin. Detailed Implementation

[0029] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0030] Example 1:

[0031] like Figures 1-6As shown, this embodiment provides a cement head plug falling indicator, including a crash shield 1, a bracket 2, a monitoring lever 3, a rotating shaft 4, an elastic reset component 5, a trigger detection component, and a counting component. The bracket 2 can be installed on the casing joint of the cement head, and the crash shield 1 is installed on the bracket 2. The rotating shaft 4 is rotatably mounted on the bracket 2, and the monitoring lever 3, the signal trigger component, and the counting component are connected to the rotating shaft 4. The elastic reset component 5 is provided between the signal trigger component and the bracket 2, and between the counting component and the bracket 2. The signal trigger component can be connected to a signal receiving module. The free end of the monitoring lever 3 can be inserted into the casing joint. When the cement plug falls along the casing joint, it can abut against and drive the monitoring lever 3 to rotate. The rotation of the monitoring lever 3 drives the rotating shaft 4 to rotate. The rotation of the rotating shaft 4 can trigger the signal trigger component. The rotation of the rotating shaft 4 can also drive the counting component to rotate to achieve counting.

[0032] Specifically, its monitoring lever 3 is directly inserted into the casing joint. When the cement plug falls, the lever rotates through physical contact, eliminating the need for a magnetic body embedded in the rubber plug as required by magnetic induction indicators. This reduces the special requirements for the rubber plug, making it compatible with various standard rubber plugs. It also avoids signal distortion caused by magnetic field interference, ensuring a direct correlation between monitoring and the actual falling state of the rubber plug, thus improving detection accuracy. The trigger detection component and the counting component are coaxially connected to the rotating shaft 4, forming a dual system of mechanical counting and remote electronic counting. When the cement plug passes through, the rotation of the rotating shaft 4 synchronously triggers both components. The trigger detection component outputs an electrical signal to achieve remote real-time counting, meeting the needs of intelligent monitoring. Through mechanical physical counting by the counting component, even if the electronic system fails, the number of passes can still be read by observing the mechanical status. This is particularly suitable for the traceability needs of the two rubber plugs in dual-plug operations, solving the failure risk of traditional single electronic counting. The anti-collision cover 1 and the bracket 2 form a closed protective space, enclosing the core components such as the rotating shaft 4 and the trigger detection component. This effectively prevents mud splashes, dust intrusion, and accidental collisions from the well site, avoiding component damage caused by the lack of protection, as seen in traditional proximity switch type 62 indicators. Simultaneously, the stable connection between the bracket 2 and the casing joint reduces the impact of vibration on the rotational accuracy of the rotating shaft 4, ensuring stable operation of the trigger detection component and the counting component, and extending the equipment's service life. Elastic reset components 5 are installed between the signal trigger component and the bracket 2, and between the counting component and the bracket 2, forming a double elastic buffer: when the cement plug passes through, the elastic reset component 5 can quickly return the rotating shaft 4, monitoring lever 3, and other components to their original positions, awaiting the next trigger. All components are integrated and assembled with the bracket 2 via the rotating shaft 4. The monitoring lever 3, trigger detection component, and counting component form a linked whole around the rotating shaft 4, reducing assembly errors in traditional distributed structures and ensuring synchronized operation. Furthermore, the modular design allows for easy deployment by simply fixing the bracket 2 to the casing joint during installation, improving the convenience of on-site operations. Compared to existing technologies, this design, through direct contact monitoring, dual counting redundancy, and integrated protection and reset, solves the problems of dependence on rubber plugs and magnetic field interference in magnetic induction, and overcomes the shortcomings of indirect triggering and single counting of proximity switch type 62. While improving the accuracy and reliability of monitoring, it also takes into account the adaptability to harsh well site environments and the stability of continuous operation, providing a more efficient and reliable solution for monitoring the falling status of cement plugs.

[0033] Furthermore, such as Figure 1 and Figure 2As shown, the signal triggering assembly includes a switch baffle 61 and a proximity switch 62. The switch baffle 61 is mounted on the rotating shaft 4, and the proximity switch 62 is mounted on the bracket 2. An elastic reset member 5 is disposed between the switch baffle 61 and the bracket 2. The proximity switch 62 can be connected to a signal receiving module. The switch baffle 61 has a trigger portion. In the standby state, the trigger end of the proximity switch 62 faces the trigger portion of the switch baffle 61. When the monitoring lever 3 rotates, it can drive the switch baffle 61 to rotate away from the proximity switch 62 through the rotating shaft 4, causing the switch to change signal. The switch baffle 61 and the proximity switch 62 are linked through the rotating shaft 4 to realize the change of electrical signal triggered by mechanical action, ensuring accurate feedback of the rubber plug's falling state. The elastic reset member 5 forms a buffer between the switch baffle 61 and the bracket 2. After the rubber plug passes through, it drives the baffle to quickly return to its original position and absorb impact energy, avoiding component wear caused by rigid collision and extending the service life of the proximity switch 62. Specifically, in this embodiment, the switch baffle 61 and the rotating shaft 4 are detachably connected by a first connecting pin 63. In case of failure, individual components can be replaced, significantly shortening maintenance time and improving well site operation efficiency.

[0034] Furthermore, such as Figure 1 and Figure 2As shown, the counting assembly includes a one-way bearing 71, a counting sleeve 72, and a zeroing assembly. The counting sleeve 72 is mounted on the rotating shaft 4 via the one-way bearing 71. The zeroing assembly is located on the rotating shaft 4. An elastic reset component 5 is located between the zeroing assembly and the bracket 2. When the rotating shaft 4 rotates, the one-way bearing 71 drives the counting sleeve 72 to rotate at a fixed angle to achieve counting. The zeroing assembly enables the rotating shaft 4 to rotate, and the rotation of the rotating shaft 4 drives the counting bearing to zero via the one-way bearing 71. The one-way bearing 71 ensures that the counting sleeve 72 rotates synchronously only when the rotating shaft 4 rotates forward due to the rubber stopper trigger, and does not follow the movement when rotating in the reverse direction. This avoids miscounting caused by reset vibration and reverse impact in traditional counting structures, ensuring that each count strictly corresponds to the actual passage state of the rubber stopper, resulting in accurate and reliable counting results. The zeroing assembly achieves progressive zeroing through multiple forward rotations of the rotating shaft 4. Each time the rotating shaft 4 rotates by a certain angle, the counting sleeve 72 rotates synchronously under the action of the one-way bearing 71. However, when the elastic reset component 5 drives the rotating shaft 4 to reset in the reverse direction after release, the counting sleeve 72 remains in its current position due to the slippage of the one-way bearing 71. By repeating the rotation-release-reset cycle, the counting sleeve 72 is gradually rotated back to its initial position, completing the zeroing process. Utilizing the characteristics of the one-way bearing 71, unidirectional counting is combined with multi-step forward zeroing, achieving the zeroing function without additional complex structures. Resetting is achieved by accumulating angles through multiple forward rotations, rather than directly zeroing by reverse rotation. This maintains the unidirectional counting property of the one-way bearing 71 while achieving the zeroing target through a simple mechanical cycle, achieving a balance between functional reuse and structural simplification. Specifically, the zeroing component includes a zeroing baffle 73 and a zeroing lever 74; the zeroing lever 74 is set on the rotating shaft 4 through the zeroing baffle 73; rotating the zeroing lever 74 can drive the rotating shaft 4 to rotate.

[0035] Furthermore, such as Figures 1-6 As shown, the zeroing assembly includes a zeroing baffle 73 and a zeroing lever 74. The zeroing lever 74 is mounted on the rotating shaft 4 via the zeroing baffle 73. Rotating the zeroing lever 74 drives the rotating shaft 4 to rotate. The zeroing baffle 73 and the rotating shaft 4 are detachably connected via a second connecting pin 75. The reset baffle is rigidly connected to the rotating shaft 4 via the second connecting pin 75, forming a direct transmission chain of manual operation - rotating shaft 4 linkage - rotation of the counting sleeve 72. By rotating the zeroing lever 74, the operator can control the forward rotation angle of the rotating shaft 4, driving the counting sleeve 72 to gradually accumulate rotation to the initial state to achieve zeroing the count. This transforms complex electronic control or clutch mechanisms into purely mechanical operation, providing greater reliability and safety in well site environments with strict explosion-proof requirements.

[0036] Furthermore, such as Figure 1 and Figure 2As shown, the bracket 2 includes a support 21 and a base plate 22. The support 21 can be installed on the sleeve joint of the cement head. The support 21 is set on the base plate 22. The anti-collision cover 1 is installed on the support 21. The rotating shaft 4 is rotatably installed on the support 21. A blind hole is opened in the middle of the support 21. The monitoring lever 3 is located in the blind hole and installed on the rotating shaft 4. The free end of the monitoring lever 3 extends out from the opening of the blind hole. The support 21 and the base plate 22 form an installation space. The anti-collision cover 1 covers the key transmission components, effectively preventing mud, rock debris and other contaminants from directly intruding into the rotating shaft 4, monitoring lever 3 and other core components, reducing the risk of mechanical failure caused by external impurities. The size and shape of the blind hole are adapted to the rotation trajectory of the monitoring lever 3, ensuring that the rotation process of the lever under the impact of the rubber plug is not restricted by space, avoiding action jamming caused by structural interference, ensuring that the lever can smoothly drive the rotating shaft 4 to rotate when the rubber plug passes through, and ensuring the timely response of the trigger detection component and the counting component.

[0037] Furthermore, such as Figure 3 As shown, the support 21 has an installation through hole communicating with the blind hole, and the installation through hole extends through the anti-collision cover 1. A plug 23 is installed inside the installation through hole, and a protective cover 24 is installed at the opening of the installation through hole on the outside of the anti-collision cover 1. The installation through hole provides an operating channel for the initial assembly of the monitoring rod 3. The rod can be inserted from the through hole into the blind hole and connected to the rotating shaft 4 without disassembling the support 21 or the casing joint, simplifying the assembly process. Especially when the casing joint is fixed at the well site, it greatly reduces the difficulty of on-site installation. The blind hole of the support 21 communicates with the through hole on the casing joint for the monitoring rod 3 to pass through, while the installation through hole is an independent channel on the support 21 for assembling the rod. After the plug 23 seals the installation through hole, it can completely isolate the channel from the external environment, ensuring stable cementing operation pressure. The protective cover 24 provides safety protection for the plug 23. Under high pressure conditions, it can prevent the plug 23 from accidentally falling off due to vibration and pressure impact, and avoid the well medium from spraying out of the installation through hole or the plug 23 from popping out, which could cause a safety accident. At the same time, the plug 23 adopts a detachable design, which can be quickly removed when the lever needs to be maintained in the future, taking into account both safety protection and maintenance convenience.

[0038] Preferably, in this embodiment, the elastic reset member 5 is a reset spring.

[0039] The cement head plug drop indicator provided in this embodiment is used as follows: before cementing operations begin, the indicator is first initialized and checked: the counting sleeve 72 is confirmed to be in the zero position, the monitoring lever 3 is reset to the initial position (the free end is inserted into the casing joint to a preset depth) under the action of the elastic reset member 5, the proximity switch 62 and the trigger part of the switch baffle 61 are accurately aligned, the protective cover 24 and the plug 23 are firmly installed, and the signal line of the proximity switch 62 is correctly connected to the signal receiving module of the cementing control system.

[0040] When cementing operations begin and the pumped isolation fluid pushes the lower rubber plug down along the casing joint, the lower end face of the lower rubber plug first contacts the free end of the monitoring lever 3 and pushes it to rotate. The rotation of the lever drives the rotating shaft 4 to rotate synchronously. At this time, the rotating shaft 4 drives the switch baffle 61 to rotate, moving the trigger part away from the proximity switch 62. The proximity switch 62 immediately generates a signal change, which is transmitted to the signal receiving module, remotely displaying that the lower rubber plug has passed. At the same time, the rotating shaft 4 drives the counting sleeve 72 to rotate forward by a fixed angle through the one-way bearing 71. The scale or mark on the counting sleeve 72 changes accordingly, counting to "1". After the lower rubber plug has completely passed, the monitoring lever 3 loses thrust, and the elastic reset member 5 releases its elastic force synchronously, driving the rotating shaft 4 to rotate in the opposite direction to reset. The monitoring lever 3 returns to its initial position, and the switch baffle 61 also resets with the rotating shaft 4 (the trigger part is re-aligned with the proximity switch 62, and the signal returns to its initial state), waiting for the upper rubber plug to pass. Due to the unidirectional transmission characteristic of the one-way bearing 71, the counting sleeve 72 remains stationary when the rotating shaft 4 reverses and resets, thus retaining the count "1". When the cement slurry pump pushes the upper rubber stopper down, the above process is repeated: the upper rubber stopper pushes the monitoring lever 3 to rotate, triggering the proximity switch 62 to send a signal to the signal receiving module again, remotely displaying that the upper rubber stopper has passed; at the same time, the rotating shaft 4 drives the counting sleeve 72 to rotate another fixed angle through the one-way bearing 71, and the counting sleeve 72 displays "2", completing the counting record of the double rubber stopper passing.

[0041] After cementing operations are completed, if it is necessary to reset the counting status, the operator can rotate the zeroing lever 74 of the zeroing component to drive the rotating shaft 4 to rotate forward. At this time, the one-way bearing 71 drives the counting sleeve 72 to rotate synchronously. After multiple rotation-release cycles (the elastic reset component 5 drives the rotating shaft 4 to reset in the reverse direction, and the counting sleeve 72 maintains its current position), the counting sleeve 72 rotates back to the zero position, completing the counting zeroing and preparing for the next operation.

[0042] Throughout the entire process, the anti-collision cover 1 and the plug 23 effectively prevent mud from entering, the protective cover 24 prevents the plug 23 from accidentally popping out under high pressure, and the detachable connection structure facilitates quick replacement when the parts are worn, ensuring stable operation of the equipment in a continuous high-pressure, impurity-rich well site environment.

[0043] Example 2:

[0044] This embodiment provides a falling indicator system, including a pressure transmitter and the cement head stopper falling indicator described in Embodiment 1. The pressure transmitter is also installed on the bushing joint, with its detection port extending into the bushing joint without affecting the falling of the stopper. When the stopper successfully passes through the detection port of the pressure transmitter, the pressure transmitter will show a significant change in value, thus detecting that the stopper has fallen smoothly. Simultaneously, during the stopper's falling process up to the impact stage, the pressure transmitter can also detect changes in the pressure inside the bushing in real time, thereby achieving remote monitoring and fault alarm.

[0045] The cement head stopper drop indicator directly records the number of stops through mechanical contact, while the pressure transmitter verifies the actual drop status of the stopper by detecting sudden pressure changes at the detection port. The signals from both mutually corroborate each other. If only one is triggered, the system can quickly identify false triggering or component failure, avoiding the risks of missed detections or misjudgments associated with single monitoring methods and ensuring accurate confirmation of the stopper's passage status. This system overcomes the limitations of single-device monitoring through functional synergy, retaining both the intuitiveness of mechanical counting and the remote capability of electronic signals, while also leveraging pressure parameters to make in-depth judgments on the quality of the operation, providing more comprehensive technical support for the safety and accuracy of cementing operations.

[0046] In the description of this utility model, it should be understood that the terms "first" and "second" 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0048] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cement head rubber stopper drop indicator, characterized in that, Includes a crash shield (1), a bracket (2), a monitoring lever (3), a rotating shaft (4), an elastic reset component (5), a trigger detection component, and a counting component; The bracket (2) can be installed on the sleeve joint of the cement head, and the anti-collision cover (1) is installed on the bracket (2); the rotating shaft (4) is rotatably set on the bracket (2), and the monitoring lever (3), the signal triggering component and the counting component are connected to the rotating shaft (4); an elastic reset component (5) is provided between the signal triggering component and the bracket (2) and between the counting component and the bracket (2); The signal triggering component can be connected to the signal receiving module; The free end of the monitoring lever (3) can be inserted into the casing joint. When the cement plug falls along the casing joint, it can abut against and drive the monitoring lever (3) to rotate. The rotation of the monitoring lever (3) drives the rotating shaft (4) to rotate. The rotation of the rotating shaft (4) can trigger the signal triggering component. The rotation of the rotating shaft (4) can also drive the counting component to rotate to achieve counting.

2. The cement head stopper drop indicator as described in claim 1, characterized in that, The signal triggering component includes a switch baffle (61) and a proximity switch (62); A switch baffle (61) is mounted on a rotating shaft (4), and a proximity switch (62) is mounted on a bracket (2); an elastic reset element (5) is disposed between the switch baffle (61) and the bracket (2); the proximity switch (62) can be connected to a signal receiving module; The switch baffle (61) has a trigger part; In standby mode, the trigger end of the proximity switch (62) faces the trigger part of the switch baffle (61); when the monitoring lever (3) rotates, it can drive the switch baffle (61) to rotate away from the trigger part of the proximity switch (62) through the rotating shaft (4), so that the switch signal changes.

3. The cement head stopper drop indicator as described in claim 2, characterized in that, The switch baffle (61) and the rotating shaft (4) are detachably connected by a first connecting pin (63).

4. The cement head rubber stopper drop indicator as described in claim 1, characterized in that, The counting assembly includes a one-way bearing (71), a counting bushing (72), and a zeroing assembly; The counting bushing (72) is mounted on the rotating shaft (4) via a one-way bearing (71); the zeroing component is located on the rotating shaft (4); the elastic reset component (5) is located between the zeroing component and the bracket (2); When the rotating shaft (4) rotates, it drives the counting shaft sleeve (72) to rotate at a fixed angle through the one-way bearing (71) to achieve counting; the zeroing component enables the rotating shaft (4) to rotate, and the rotation of the rotating shaft (4) drives the counting bearing to reset through the one-way bearing (71).

5. The cement head stopper drop indicator as described in claim 4, characterized in that, The reset assembly includes a reset baffle (73) and a reset lever (74); The zeroing lever (74) is mounted on the rotating shaft (4) via the zeroing baffle (73); Rotating the zeroing lever (74) can drive the rotating shaft (4) to rotate.

6. The cement head stopper drop indicator as described in claim 5, characterized in that, The zeroing baffle (73) and the rotating shaft (4) are detachably connected by a second connecting pin (75).

7. The cement head rubber stopper drop indicator as described in claim 1, characterized in that, The support (2) includes a support (21) and a base plate (22); The support (21) is set on the base plate (22), the anti-collision cover (1) is installed on the support (21), the rotating shaft (4) is rotatably installed on the support (21), a blind hole is opened in the middle of the support (21), the monitoring lever (3) is located in the blind hole and installed on the rotating shaft (4), and the free end of the monitoring lever (3) extends out from the opening of the blind hole.

8. The cement head rubber plug drop indicator as described in claim 7, characterized in that, The support (21) has an installation through hole that communicates with the blind hole, and the installation through hole extends through the anti-collision cover (1). A plug (23) is installed in the installation through hole, and a protective cover (24) is installed at the opening of the installation through hole on the outside of the anti-collision cover (1).

9. The cement head rubber stopper drop indicator as described in claim 1, characterized in that, The elastic reset component (5) is a reset spring.

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