Cement head blocking pin execution device, cement head blocking pin assembly and cement head

Abstract

The application provides a cement head block pin executing device, a cement head block pin assembly and a cement head, relates to the technical field of well cementing, and can realize manual and automatic integrated control mode and is simple and convenient for the construction process of the well cementing cement head. The cement head block pin executing device comprises: a manual part, the manual part comprising a first connecting structure; a driving part, the driving part comprising opposite driving ends and connecting ends, the driving ends being provided with driving shafts, the driving shafts being used for connecting the block pins to drive the block pins to perform telescopic movement, the connecting ends being provided with second connecting structures, the second connecting structures being connected with the driving shafts, the second connecting structures being rotated with the driving shafts; and the second connecting structures being used for being connected with the first connecting structure to drive the second connecting structure to rotate with the first connecting structure. The cement head block pin assembly and the cement head comprise the cement head block pin executing device, are mainly used for realizing manual and automatic integrated control of the cement head, and are simple and convenient for the construction process of the well cementing cement head.

Description

Technical Field

[0001] This invention relates to the field of cementing technology, and in particular to a cement head stop pin actuator, a cement head stop pin assembly, and a cement head. Background Technology

[0002] Cement heads are essential wellhead tools in cementing operations. As the cementing environment becomes increasingly complex, wellhead operators often need to operate cement heads under high pressure, which poses a high risk to the operation.

[0003] Currently, in order to improve the safety of wellhead operators in operating cementing heads, cementing heads are usually replaced with cementing heads whose stop pins can be remotely controlled. However, the modified cementing heads often only achieve remote control and lose the function of manual operation. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a cement head stop pin actuator, a cement head stop pin assembly, and a cement head, which can realize a manual and automatic integrated operation mode, and the construction process of cementing cement heads is simple and convenient.

[0005] To achieve the above objectives, the present invention mainly provides the following technical solutions:

[0006] On one hand, embodiments of the present invention provide a cement head stop pin actuator, comprising:

[0007] Manual part, the manual part including a first connecting structure;

[0008] The driving unit includes a driving end and a connecting end opposite each other. The driving end is provided with a driving shaft, which is used to connect a stop pin to drive the stop pin to perform telescopic movement. The connecting end is provided with a second connecting structure, which is connected to the driving shaft and rotates simultaneously with the driving shaft. The second connecting structure is used to connect with the first connecting structure so that the first connecting structure drives the second connecting structure to rotate.

[0009] Specifically, the drive unit has a connecting end connected to a mounting component, and the manual unit is movably connected to the mounting component. The manual unit is used to connect to or disconnect from the second connection structure relative to the mounting component.

[0010] Specifically, the mounting component includes an inner cavity extending through both ends of the mounting component, one end of the mounting component is connected to the connecting end of the driving part, and the second connecting structure of the driving part is located inside the inner cavity;

[0011] The manual part is inserted through the other end of the mounting component, and the first connecting structure of the manual part is located inside the cavity.

[0012] Specifically, the end of the first connecting structure is provided with a cross groove, and the end of the second connecting structure is provided with a cross protrusion that matches the cross groove.

[0013] Furthermore, a measuring component is provided at the drive end and / or connection end of the drive unit, the measuring component being used to measure the number of rotations of the drive shaft and / or the second connection structure.

[0014] Furthermore, the aforementioned cement head stop pin actuator also includes:

[0015] The control unit is connected to the measuring component and is used to issue a command to stop the operation of the drive unit when the measured value received by the measuring component reaches a preset value.

[0016] And / or, the cement head stop pin actuator further includes an alarm unit, which is connected to the measuring component and is used to issue an alarm signal when the measured value received by the measuring component reaches the preset value;

[0017] And / or, the measuring component is an eddy current sensor.

[0018] Specifically, the manual part further includes a handwheel, which is connected to the first connecting structure and is used to drive the first connecting structure to rotate;

[0019] And / or, the drive unit is a dual-axis hydraulic motor, one axis of the dual-axis hydraulic motor is the drive shaft, and the other axis of the dual-axis hydraulic motor is provided with the second connection structure.

[0020] On the other hand, embodiments of the present invention provide a cement head stop pin assembly, including: a stop pin and the above-described cement head stop pin actuator;

[0021] The drive shaft of the cement head stop pin actuator is connected to the stop pin and is used to drive the stop pin to perform telescopic movement.

[0022] Specifically, the drive shaft of the cement head stop pin actuator is connected to the stop pin via a transmission assembly. The transmission assembly includes a torsion sleeve and a transmission shaft that are fixedly connected to each other. The torsion sleeve is sleeved on the drive shaft and the torsion sleeve is connected to the drive shaft via a spline. The stop pin includes a blocking part and a transmission part that are connected to each other. The transmission part of the stop pin is helically connected to the transmission shaft.

[0023] Specifically, the torsion sleeve is fitted with an installation sleeve, the installation sleeve is connected to the drive end of the cement head stop pin actuator, the transmission part of the stop pin is fitted with a stop pin outer sleeve, the stop pin outer sleeve is connected to the installation sleeve, and the stop pin outer sleeve is used to connect with the cement head body.

[0024] Specifically, a sealing element is provided between the retaining pin sleeve and the retaining pin, and the sealing element is located at the end of the retaining pin sleeve near the end connected to the cement head body;

[0025] And / or, a first positioning structure is provided inside the retaining pin sleeve, and a second positioning structure is provided on the outer wall of the retaining pin. When the retaining pin extends to a preset position, the first positioning structure and the second positioning structure cooperate to restrict the retaining pin from extending outward.

[0026] Specifically, the first positioning structure is a positioning groove disposed inside the outer sleeve of the stop pin, and the second positioning structure is a positioning protrusion disposed on the outer wall of the stop pin, wherein the positioning protrusion is located inside the positioning groove.

[0027] On the other hand, embodiments of the present invention provide a cement head, including: a cement head body and the above-described cement head stop pin assembly.

[0028] Furthermore, the cement head body is equipped with an explosion-proof limit switch, which is used to trigger the explosion-proof limit switch to send a rubber plug falling indication signal when the rubber plug inside the cement head body falls.

[0029] This invention provides a cement head stop pin actuator, a cement head stop pin assembly, and a cement head. The cement head stop pin actuator features a drive unit with a structure that rotates simultaneously on both sides, namely a drive shaft and a second connecting structure. This allows for remote control of the drive unit, causing the drive shaft to rotate and drive the stop pin, which is connected to it, to extend and retract. When needed, a manual unit connects to the second connecting structure of the drive unit, allowing the manual unit to rotate and drive the second connecting structure, which in turn rotates the drive shaft, causing the stop pin to extend and retract. This design achieves integrated manual and automatic control of the cement head, and allows for modification of existing cement heads. The cement head stop pin actuator can be connected to the cement head body, and the drive shaft of the drive unit can be connected to the stop pin, making it simple, convenient, time-saving, and labor-saving. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a cement head stop pin actuator provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of a cement head stop pin assembly provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of a cement head provided in an embodiment of the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figure 1 As shown, this embodiment of the invention provides a cement head stop pin actuator, comprising: a manual part 1, which includes a first connecting structure 11; and a driving part 2, which includes a driving end 21 and a connecting end 22, wherein the driving end 21 is provided with a driving shaft 211 for connecting the stop pin to drive the stop pin to perform telescopic movement, and the connecting end 22 is provided with a second connecting structure 221 for connecting the driving shaft 211 and rotating simultaneously with the driving shaft 211; the second connecting structure 221 is used to connect with the first connecting structure 11 so that the first connecting structure 11 drives the second connecting structure 221 to rotate.

[0035] The manual part 1 is used by the operator to manually operate the cement head stop pin actuator. The first connecting structure 11 of the manual part 1 drives the second connecting structure 221 of the drive part 2 to rotate, and the second connecting structure 221 drives the drive shaft 211 to rotate, so that the drive shaft 211 drives the stop pin connected to it to perform telescopic movement.

[0036] The connection methods between the first connecting structure 11 and the second connecting structure 221 can include the following: The first connecting structure 11 and the second connecting structure 221 can be designed as a matching groove and protrusion connection. When manual operation is required, the first connecting structure 11 is inserted into the second connecting structure 221 of the drive unit 2, so that the second connecting structure 221 can rotate when the first connecting structure 11 rotates; or, the first connecting structure 11 and the second connecting structure 221 can be designed as a threaded connection. When manual operation is required, the second connecting structure 221 is fixed, the first connecting structure 11 is screwed onto the second connecting structure 221 until it is in place, and then the second connecting structure 221 is released. The manual unit 1 is rotated to make the first connecting structure 11 rotate, which in turn drives the second connecting structure 221 to rotate. However, this design method is relatively cumbersome to operate compared to the first design method.

[0037] The drive unit 2 can be a motor drive connected to a wheel with two shafts. For example, the motor shaft is connected to the first drive wheel, the first drive wheel is connected to the second drive wheel, and the two ends of the second drive wheel are respectively provided with opposite shafts. When the motor is started, the shafts at both ends of the second drive wheel rotate simultaneously. Alternatively, the drive unit 2 can be a dual-shaft electric / pneumatic / hydraulic motor, etc., which is not limited here.

[0038] Combination Figure 2 The transmission connection between the drive shaft 211 of the drive unit 2 and the stop pin 3 can be implemented in several ways: the drive shaft 211 and the stop pin 3 can be connected by a helical transmission. For example, the drive shaft 211 can be fixedly connected to a transmission shaft 41, which has an external thread. The stop pin 3 includes a hollow transmission part 31 and a solid partition part 32. The transmission part 31 of the stop pin 3 has an internal thread. The transmission shaft 41 and the transmission part 31 of the stop pin 3 are connected by a helical transmission. When the drive shaft 211 drives the transmission shaft 41 to rotate, the stop pin 3 moves linearly. Alternatively, the drive shaft 211 can be fixedly connected to a gear, and the stop pin 3 can be fixedly connected to a rack. The rotation of the gear drives the rack to move linearly, thereby enabling the drive shaft 211 to rotate and drive the stop pin 3 to move linearly. Alternatively, a worm gear transmission can also be used. No specific limitations are imposed here.

[0039] The following describes the embodiments of the present invention in detail through the working principle of the cement head stop pin actuator.

[0040] like Figures 1 to 3 As shown, when the cementing head needs to be automated, the stop pin 3 of the cementing head can be removed, the drive shaft 211 of the cementing head stop pin actuator can be connected to the stop pin 3, the cementing head stop pin actuator can be fixed on the cementing head body 5, and the stop pin 3 can be put back in its original position. The drive unit 2 of the cementing head stop pin actuator can be connected to the remote control system. The drive unit 2 can be operated remotely to make the drive shaft 211 of the drive unit 2 rotate and drive the stop pin 3 to perform telescopic movement. In this working state, the manual unit 1 and the drive unit 2 are separated. In the event of a failure of the drive unit 2 or other situations requiring manual operation, the operator can connect the first connecting structure 11 of the manual unit 1 to the second connecting structure 221 of the drive unit 2. By rotating the manual unit 1, the second connecting structure 221 can be rotated, thereby driving the drive shaft 211 to rotate, so that the stop pin 3 can perform telescopic movement.

[0041] The cement head stop pin actuator provided in this embodiment of the invention, by designing a drive unit 2 with a structure that rotates simultaneously on both sides, namely a drive shaft 211 and a second connecting structure 221, can realize remote control of the drive unit 2, so that the drive shaft 211 rotates and drives the stop pin 3 connected to it to perform telescopic movement. At the same time, when needed, the first connecting structure 11 of the manual part 1 is connected to the second connecting structure 221 of the drive unit 2, so that rotating the manual part 1 drives the second connecting structure 221 to rotate, thereby rotating the drive shaft 211 that rotates simultaneously with the second connecting structure 221, so as to drive the stop pin 3 to perform telescopic movement. The above design realizes the manual and automatic integrated operation of the cement head, and can be used for construction modification of the original cement head. That is, the cement head stop pin actuator of this embodiment of the invention can be connected to the cement head body 5, and the drive shaft 211 of the drive unit 2 can be connected to the stop pin 3 for transmission. It is simple, convenient, time-saving and labor-saving.

[0042] Specifically, the connecting end 22 of the drive unit 2 is connected to the mounting component 6, and the manual unit 1 is movably connected to the mounting component 6. The manual unit 1 is used to connect to or disconnect from the second connecting structure 221 relative to the mounting component 6. The mounting component 6 may include a surrounding cavity wall that encloses the first connecting structure 11 and the second connecting structure 221. Alternatively, the mounting component 6 may be designed as a support structure, as long as it is movably connected to the manual unit 1; this is not limited here. The mounting component 6 may be provided with through holes, grooves, or guide rails that fit the movable connection point of the manual unit 1, allowing the manual unit 1 to easily approach or move away from the second connecting structure 221 along a preset trajectory. This enables more precise connection or disconnection of the first connecting structure 11 of the manual unit 1 from the second connecting structure 221, avoiding difficulty in finding the correct position during docking and saving time and effort.

[0043] Specifically, the mounting component 6 includes an inner cavity extending through both ends of the mounting component 6. One end of the mounting component 6 is connected to the connecting end 22 of the drive unit 2, and the second connecting structure 221 of the drive unit 2 is located within the inner cavity. The manual part 1 is connected to the other end of the mounting component 6, and the first connecting structure 11 of the manual part 1 is located within the inner cavity. By adopting a design that encloses the first connecting structure 11 and the second connecting structure 221, these two structures can be better protected, resulting in a lower damage rate.

[0044] Specifically, the end of the first connecting structure 11 is provided with a cross-shaped groove, and the end of the second connecting structure 221 is provided with a cross-shaped protrusion that matches the cross-shaped groove. When manual operation is required, the manual part 1 is pushed towards the driving part 2, so that the cross-shaped groove and the cross-shaped protrusion are engaged, thereby enabling the first connecting structure 11 to drive the second connecting structure 221 to rotate together. This design makes it convenient to connect the first connecting structure 11 and the second connecting structure 221.

[0045] Furthermore, a measuring component 7 is provided at the drive end 21 and / or the connecting end 22 of the drive unit 2. The measuring component 7 is used to measure the number of rotations of the drive shaft 211 and / or the second connecting structure 221. The measuring component 7 can be a magnetoelectric sensor, a photoelectric rotation sensor, etc. The number of rotations of the drive unit 2 and / or the second connecting structure 221 can be obtained through the measuring component 7 and sent to a monitoring system to monitor the working status of the cement head stop pin actuator. Alternatively, the following implementation method can also be used:

[0046] The cement head stop pin actuator of this embodiment further includes a control unit (not shown in the figure), which is connected to the measuring component 7 and is used to issue a command to stop the operation of the drive unit 2 when the measured value received by the measuring component 7 reaches a preset value; wherein, the preset value is the number of revolutions measured by the measuring component 7 to reach the number of revolutions required for the extension or retraction stroke of the stop pin 3. The control unit can be connected to the power source of the drive unit 2. For example, if the drive unit 2 is hydraulically driven, the drive unit 2 can directly use the hydraulic source of the well site, and the control unit can be connected to the hydraulic source of the well site. The drive unit 2 can also be configured with an independent hydraulic source, and the control unit can be connected to the independently configured hydraulic source. When the number of revolutions measured by the measuring component 7 reaches the preset value, the control unit stops the hydraulic source from supplying oil, so that the drive unit 2 stops working.

[0047] Furthermore, the cement head stop pin actuator of this embodiment of the invention also includes an alarm unit (not shown in the figure), which is connected to the measuring component 7 and is used to issue an alarm signal when the measured value received by the measuring component 7 reaches a preset value; wherein, the preset value is the number of revolutions measured by the measuring component 7 that is required for the stop pin 3 to extend or retract. The alarm unit can be a warning light or sound device, or the alarm unit can be integrated into the control unit, through which the control unit can issue alarm light or alarm sound, etc.

[0048] Specifically, the measuring component 7 is an eddy current sensor. The eddy current sensor can accurately measure the static and dynamic relative displacement changes between the drive shaft 211 and / or the second connecting structure 221 and the end face of the measuring probe. It has good long-term reliability, wide measurement range, high sensitivity, high resolution, fast response speed, strong anti-interference ability, is not affected by oil or other media, and has a simple structure.

[0049] Specifically, the manual unit 1 also includes a handwheel 12, which is connected to the first connecting structure 11 and is used to drive the first connecting structure 11 to rotate. The handwheel 12 allows the operator to easily rotate the manual unit 1 when performing manual operation.

[0050] Specifically, the drive unit 2 is a dual-shaft hydraulic motor. One shaft of the dual-shaft hydraulic motor is the drive shaft 211, and the other shaft is provided with a second connecting structure 221. The structural design is based on the dual-shaft hydraulic motor, making the structural design simpler and more convenient. The power source of the dual-shaft hydraulic motor can also utilize the hydraulic source at the well site, eliminating the need for an additional hydraulic source and saving time and effort.

[0051] like Figure 2 As shown, this embodiment of the invention provides a cement head stop pin assembly, including: a stop pin 3 and the above-mentioned cement head stop pin actuator; the drive shaft 211 of the cement head stop pin actuator is connected to the stop pin 3 and is used to drive the stop pin 3 to perform telescopic movement.

[0052] The structure, connection method with the stop pin 3, and working principle of the cement head stop pin actuator are the same as those in the above embodiments, and will not be repeated here.

[0053] The cement head stop pin assembly provided in this embodiment of the invention features a cement head stop pin actuator with a drive unit 2 having a structure that rotates simultaneously on both sides, namely a drive shaft 211 and a second connecting structure 221. This allows for remote control of the drive unit 2, causing the drive shaft 211 to rotate and drive the stop pin 3, which is connected to it, to extend and retract. Simultaneously, when needed, the first connecting structure 11 of the manual unit 1 connects to the second connecting structure 221 of the drive unit 2, allowing the manual unit 1 to rotate and drive the second connecting structure 221 to rotate, thereby rotating the drive shaft 211, which in turn drives the stop pin 3 to extend and retract. This design achieves integrated manual and automatic control of the cement head, and allows for modification of the existing cement head. The cement head stop pin actuator of this embodiment can be connected to the cement head body 5, and the drive shaft 211 of the drive unit 2 can be connected to the stop pin 3, making the process simple, convenient, time-saving, and labor-saving.

[0054] Specifically, the drive shaft 211 of the cement head stop pin actuator is connected to the stop pin 3 via a transmission assembly 4. The transmission assembly 4 includes a torsion sleeve 42 and a transmission shaft 41 fixedly connected to each other. The torsion sleeve 42 is fitted onto the drive shaft 211, and the torsion sleeve 42 and the drive shaft 211 are connected by a spline. The stop pin 3 includes a partition part 32 and a transmission part 31 connected to each other. The transmission part 31 of the stop pin 3 is helically connected to the transmission shaft 41. The drive shaft 211 may be provided with an external spline, and the torsion sleeve 42 is provided with an internal spline. The spline connection provides more uniform force distribution, can withstand larger loads, and has higher centering accuracy. The torsion sleeve 42 and the transmission shaft 41 can be fixedly connected by welding.

[0055] Specifically, a mounting sleeve 43 is sleeved on the torsion sleeve 42. The mounting sleeve 43 is connected to the drive end 21 of the cement head stop pin actuator. A stop pin sleeve 44 is sleeved on the transmission part 31 of the stop pin 3. The stop pin sleeve 44 is connected to the mounting sleeve 43 and is used to connect to the cement head body. The stop pin sleeve 44 can be welded to the cement head body so that the cement head stop pin assembly can be installed on the cement head body. The stop pin sleeve 44 and the mounting sleeve 43 can be connected by threads, and the mounting sleeve 43 and the drive end 21 can be connected by bolts, so as to facilitate disassembly and assembly when parts need to be replaced.

[0056] Specifically, a sealing element 45 is provided between the retaining pin sleeve 44 and the retaining pin 3. The sealing element 45 is located at the end of the retaining pin sleeve 44 near the cement head body 5. A sealing groove can be provided around the inner wall of the retaining pin sleeve 44. The sealing element 45 is a sealing ring. The sealing ring is placed in the sealing groove and is fitted on the outer wall of the retaining pin 3. The sealing ring seals the retaining pin sleeve 44 and the retaining pin 3. The sealing element 45 is located at the end of the retaining pin sleeve 44 near the cement head body to prevent fluid in the cement head from entering the retaining pin sleeve 44 and affecting the normal extension and retraction of the retaining pin 3.

[0057] Specifically, a first positioning structure 441 is provided inside the retaining pin sleeve 44, and a second positioning structure 33 is provided on the outer wall of the retaining pin 3. When the retaining pin 3 extends to a preset position, the first positioning structure 441 and the second positioning structure 33 cooperate to restrict the retaining pin 3 from extending outward. The preset position is the maximum stroke required for the retaining pin 3 to extend. The second positioning structure 33 prevents the retaining pin 3 from extending further to ensure the normal extension and retraction movement of the retaining pin 3.

[0058] Specifically, the first positioning structure 441 is a positioning groove disposed within the outer sleeve 44 of the stop pin, and the second positioning structure 33 is a positioning protrusion disposed on the outer wall of the stop pin 3, with the positioning protrusion located within the positioning groove. Both the positioning protrusion and the positioning groove are designed as a protrusion and groove surrounding the circumference, a design that is simple and easy to implement.

[0059] like Figure 3 As shown, an embodiment of the present invention provides a cement head, including: a cement head body 5 and the above-mentioned cement head stop pin assembly.

[0060] The structure and working principle of the cement head stop pin assembly are the same as those in the above embodiments, and will not be repeated here.

[0061] Furthermore, the cement head body 5 is equipped with an explosion-proof limit switch 51, which is used to trigger the explosion-proof limit switch 51 to send a rubber plug falling indication signal when the rubber plug inside the cement head body 5 falls. Some original cementing heads are equipped with rubber plug falling indicators, which can also be used. An explosion-proof limit switch 51 is installed at an appropriate position on the cement head body 5. When the rubber plug falls, the rubber plug falling indicator is activated, which will trigger the sensing rod of the explosion-proof limit switch 51. The explosion-proof limit switch 51 sends a detection signal, which can be sent to the control system, alarm, indicator light 52, etc., to complete the rubber plug falling indication.

[0062] The cement head provided in this embodiment of the invention features a cement head stop pin actuator. This actuator incorporates a drive unit 2 with a structure that rotates simultaneously on both sides, namely a drive shaft 211 and a second connecting structure 221. This allows for remote control of the drive unit 2, causing the drive shaft 211 to rotate and drive the stop pin 3, which is connected to it, to extend and retract. Simultaneously, when needed, the first connecting structure 11 of the manual unit 1 connects to the second connecting structure 221 of the drive unit 2, allowing the manual unit 1 to rotate and drive the second connecting structure 221 to rotate. This, in turn, rotates the drive shaft 211, which rotates simultaneously with the second connecting structure 221, thereby driving the stop pin 3 to extend and retract. This design achieves integrated manual and automatic control of the cement head. Furthermore, it allows for modification of existing cement heads by simply connecting the cement head stop pin actuator to the cement head body 5 and connecting the drive shaft 211 of the drive unit 2 to the stop pin 3. This method is simple, convenient, and saves time and effort.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A cement head stop pin actuator, characterized in that, include: Manual part, the manual part including a first connecting structure; The driving unit includes a driving end and a connecting end opposite each other. The driving end is provided with a driving shaft, which is used to connect a stop pin to drive the stop pin to perform telescopic movement. The connecting end is provided with a second connecting structure, which is connected to the driving shaft and rotates simultaneously with the driving shaft. The second connecting structure is used to connect with the first connecting structure so that the first connecting structure drives the second connecting structure to rotate; The drive unit is connected to a mounting component at its connecting end, and the manual unit is movably connected to the mounting component. The manual unit is used to connect to or disconnect from the second connection structure relative to the mounting component. The mounting component includes an inner cavity extending through both ends of the mounting component, one end of the mounting component is connected to the connecting end of the driving part, and the second connecting structure of the driving part is located inside the inner cavity; The manual part is connected to the other end of the mounting component, and the first connecting structure of the manual part is located inside the inner cavity; The first connecting structure has a cross-shaped groove at its end, and the second connecting structure has a cross-shaped protrusion at its end that matches the cross-shaped groove. The manual part also includes a handwheel, which is connected to the first connecting structure and is used to drive the first connecting structure to rotate; And / or, the drive unit is a dual-axis hydraulic motor, one axis of the dual-axis hydraulic motor is the drive shaft, and the other axis of the dual-axis hydraulic motor is provided with the second connection structure.

2. The cement head stop pin actuator according to claim 1, characterized in that, A measuring component is provided at the drive end and / or connection end of the drive unit, and the measuring component is used to measure the number of rotations of the drive shaft and / or the second connection structure.

3. The cement head stop pin actuator according to claim 2, characterized in that, Also includes: The control unit is connected to the measuring component and is used to issue a command to stop the operation of the drive unit when the measured value received by the measuring component reaches a preset value. And / or, the cement head stop pin actuator further includes an alarm unit, which is connected to the measuring component and is used to issue an alarm signal when the measured value received by the measuring component reaches the preset value; And / or, the measuring component is an eddy current sensor.

4. A cement head stop pin assembly, characterized in that, include: The stop pin and the cement head stop pin actuator according to any one of claims 1 to 3; The drive shaft of the cement head stop pin actuator is connected to the stop pin and is used to drive the stop pin to perform telescopic movement.

5. The cement head stop pin assembly according to claim 4, characterized in that, The drive shaft of the cement head stop pin actuator is connected to the stop pin via a transmission assembly. The transmission assembly includes a torsion sleeve and a transmission shaft that are fixedly connected to each other. The torsion sleeve is sleeved on the drive shaft and the torsion sleeve is connected to the drive shaft via a spline. The stop pin includes a blocking part and a transmission part that are connected to each other. The transmission part of the stop pin is helically connected to the transmission shaft.

6. The cement head stop pin assembly according to claim 5, characterized in that, The torsion sleeve is fitted with an installation sleeve, which is connected to the drive end of the cement head stop pin actuator. The transmission part of the stop pin is fitted with a stop pin outer sleeve, which is connected to the installation sleeve. The stop pin outer sleeve is used to connect with the cement head body.

7. The cement head stop pin assembly according to claim 6, characterized in that, A sealing element is provided between the retaining pin sleeve and the retaining pin, and the sealing element is located at the end of the retaining pin sleeve near the connection to the cement head body; And / or, a first positioning structure is provided inside the retaining pin sleeve, and a second positioning structure is provided on the outer wall of the retaining pin. When the retaining pin extends to a preset position, the first positioning structure and the second positioning structure cooperate to restrict the retaining pin from extending outward.

8. The cement head stop pin assembly according to claim 7, characterized in that, The first positioning structure is a positioning groove disposed inside the outer sleeve of the stop pin, and the second positioning structure is a positioning protrusion disposed on the outer wall of the stop pin, wherein the positioning protrusion is located inside the positioning groove.

9. A cement head, characterized in that, include: The cement head body and the cement head stop pin assembly as described in any one of claims 4 to 8.

10. The cement head according to claim 9, characterized in that, The cement head body is equipped with an explosion-proof limit switch, which is used to trigger the explosion-proof limit switch to send a rubber plug falling indication signal when the rubber plug inside the cement head body falls.

Images