Rapid separation device for offshore fracturing ship pipeline and separation monitoring method

Abstract

The invention discloses an offshore fracturing ship pipeline quick release device and a release monitoring method.The offshore fracturing ship pipeline quick release device comprises an oil cylinder body, a connector body and a release connector are coaxially arranged in the oil cylinder body in a sleeved mode, an annular closed cavity is formed among the connector body, the release connector and the inner cylindrical surface of the oil cylinder body, a clamping jaw and a piston are arranged in the annular closed cavity, and one end of the clamping jaw is fixed to the end of the connector body; the piston is connected with a driving device, the driving device drives the piston to reciprocate towards the disengaging connector end or the connector body end, locking or disengaging of the connector body and the disengaging connector is achieved, multiple monitoring assemblies are arranged at the position of the piston, and the multiple monitoring assemblies are connected with a controller. The controller is connected with the driving device. According to the invention, through cooperation of three monitoring means, different working parameters of the executing mechanism of the quick release device are comprehensively detected, stable and accurate judgment of the working state of the executing mechanism is realized, and smooth, efficient and safe fracturing construction can be ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore fracturing construction, and in particular relates to a pipeline rapid detachment device for an offshore fracturing vessel and a detachment monitoring method. Background Art

[0002] During offshore fracturing operations, the fracturing equipment is fixed on the operating vessel and connected to the high-pressure manifold at the wellhead of the drilling platform via a high-pressure hose. In the event of complex weather and emergencies, the connection between the fracturing equipment and the high-pressure manifold on the drilling platform must be quickly disconnected so that the operating vessel can evacuate quickly, protect the operating equipment, and avoid loss of life and property.

[0003] Currently, common fracturing vessel quick-release devices use mechanical control to disconnect the high-pressure manifold between the workboat and the drilling platform. This method offers advantages such as simple operation and fast disconnection speed. However, the quick-release device is typically only equipped with a button or toggle switch for locking or disconnecting. In actual use, construction personnel are required to visually confirm whether the male and female ends of the quick-release device are locked or disengaged. This judgment method is highly subjective and cannot accurately determine the real-time working status of the quick-release device. In particular, when the internal mechanism of the quick-release device malfunctions or there are deviations in the execution of the action, incorrect judgment of the quick-release device status can easily lead to various safety issues. For example, the workboat has begun to evacuate before the male and female ends of the quick-release device are fully disconnected, resulting in damage to the high-pressure manifold components, and fracturing operations have begun before the quick-release device is fully locked, resulting in high-pressure liquid leakage. These issues seriously affect the normal operation of the fracturing equipment.

[0004] To solve the above problems, the present invention designs a pipeline rapid detachment device and detachment monitoring method for an offshore fracturing vessel, which can achieve stable and accurate judgment of its working status while ensuring the switching efficiency of the detachment device. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide a pipeline rapid detachment device for an offshore fracturing vessel and a detachment monitoring method. The method uses three monitoring means to comprehensively detect different working parameters of the actuator of the rapid detachment device, while ensuring the efficiency of the detachment device state switching and achieving stable and accurate judgment of its working state, which is conducive to ensuring the smooth, efficient and safe progress of fracturing construction and improving the adaptability of offshore fracturing equipment to harsh and changeable environments.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a quick-disconnect device for pipelines of offshore fracturing ships, comprising a joint body and a disengagement joint, the joint body and the disengagement joint are coaxially sleeved in the oil cylinder body, one end of the oil cylinder body is fixedly connected to the outer cylindrical surface of the joint body, the other end of the oil cylinder body is slidably connected to the disengagement joint, an annular closed cavity is provided between the outer cylindrical surface of the joint body, the outer cylindrical surface of the disengagement joint and the inner cylindrical surface of the oil cylinder body, a claw and a piston are provided in the annular closed cavity, one end of the claw is fixed to the contact end between the joint body and the disengagement joint, the other end of the claw is provided with a protrusion, and the outer cylindrical surface of the disengagement joint and the contact end of the joint body is provided with a There is a groove, the protrusion cooperates with the groove, and the piston is connected to the driving device. When the driving device drives the piston to move toward the disengagement joint end until the protrusion completely enters the groove, the joint body and the disengagement joint are locked. When the driving device drives the piston to move toward the joint body end until the protrusion completely disengages from the groove, the joint body and the disengagement joint are disengaged. A variety of monitoring components are provided at the piston, and multiple groups of the monitoring components are connected to the controller. The controller is connected to the driving device. The multiple monitoring components monitor the movement status of the piston, thereby monitoring the locking or disengagement status of the joint body and the disengagement joint.

[0007] Furthermore, the driving device is a hydraulic pump station, and a first oil port and a second oil port are provided on the outer cylindrical surface of the cylinder body. The first oil port and the second oil port are both connected to the annular closed cavity. The first oil port and the second oil port are respectively connected to the hydraulic pump station. When the hydraulic pump station passes hydraulic oil into the first oil port, the piston moves toward the direction of the disengagement joint; when the hydraulic pump station passes hydraulic oil into the second oil port, the piston moves toward the direction of the joint body.

[0008] Furthermore, the monitoring component includes a pressure monitoring device, a flow monitoring device and a stroke monitoring device. The pressure monitoring device detects the real-time oil pressure at the first oil port and the second oil port, the flow monitoring device detects the hydraulic oil flow through the first oil port or the second oil port during the working state switching process, and the stroke monitoring device detects the displacement of the piston in the annular closed cavity.

[0009] Furthermore, the stroke monitoring device includes an indicator pin, which is cylindrical. One end of the indicator pin is placed on the end face of the piston close to the disengagement joint, and the other end of the indicator pin passes out of the end face of the cylinder body as the piston moves outward. A mounting seat is provided under the indicator pin, and the end of the mounting seat is fixed on the end face of the cylinder body. A travel switch is provided on the mounting seat, and the travel switch detects the displacement of the joint body and the disengagement joint to be completely locked or disengaged.

[0010] Furthermore, the claw includes a plurality of circumferentially distributed claw blocks, and the claw block includes a vertical portion and a horizontal portion. The vertical portion is in contact with the end face of the joint body and is fixed by a tightening bolt, and the horizontal portion is in contact with the outer cylindrical surface of the detachment joint and the outer cylindrical surface of the joint body. The horizontal portion is provided with the protrusion away from the end of the vertical portion, and the vertical portion and the horizontal portion are arranged at an acute angle, and a second compression spring is provided between the nut of the tightening bolt and the vertical portion.

[0011] Furthermore, a first compression spring is provided in the annular closed cavity, and the first compression spring is placed between the end of the joint body and the piston body.

[0012] Furthermore, the oil cylinder body is provided with a manual disengagement device.

[0013] Furthermore, the present invention also provides a method for monitoring the rapid detachment of a pipeline from an offshore fracturing vessel, which utilizes the above-mentioned rapid detachment device for the pipeline from an offshore fracturing vessel, and includes the following steps:

[0014] S1: Assemble the joint body, claws, cylinder body and piston, and install the monitoring components and controller;

[0015] S2: docking the connector body with the disconnect connector, delivering hydraulic oil into the annular closed cavity through the hydraulic pump station, driving the piston to move toward the disconnect connector, and realizing the locking action of the quick disconnect device;

[0016] S3: During the locking action, the monitoring data of the monitoring component is collected in real time. First, the displacement data of the piston is used to determine whether the end of the piston has reached the end position of the annular closed cavity close to the disengagement joint. If the displacement data meets the requirements, it is then determined whether the flow rate of hydraulic oil entering the annular closed cavity exceeds the design volume of the hydraulic oil cavity on the current driving side. If so, it is further determined whether the hydraulic oil pressure on the current driving side reaches the designed working pressure. When the measured hydraulic oil pressure value meets the standard, it is determined that the quick disengagement device has entered the locking state.

[0017] S4: When the high-pressure manifold between the workboat and the drilling platform is disconnected, the quick disconnect device is controlled to execute a disconnection action, and hydraulic oil is correspondingly delivered into the annular closed cavity through the hydraulic pump station, driving the piston to move toward the joint body;

[0018] S5: During the execution of the disengagement action, the monitoring data of the monitoring component is collected in real time. First, it is determined whether the flow rate of the hydraulic oil entering the annular closed cavity exceeds the design volume of the hydraulic oil cavity on the current driving side. If it exceeds, the displacement data of the piston is used to determine whether the end of the piston has reached the end position of the annular closed cavity close to the joint body. If the displacement data meets the requirements, it is further determined whether the hydraulic oil pressure on the current driving side reaches the designed working pressure. When the measured hydraulic oil pressure value meets the standard, it is determined that the quick disengagement device has entered the disengagement state.

[0019] Furthermore, in S3, if the detected displacement data does not meet the requirements, it is judged that the hydraulic drive piston is still in the movement stage; if the detected hydraulic oil flow rate has not reached the design volume of the hydraulic oil chamber on the current driving side after the displacement data meets the standards, it is judged that the quick release device is in an unstable locking state; if the detected hydraulic oil pressure has not reached the designed working pressure after the displacement data and the hydraulic oil flow rate meet the standards, it is judged that a hydraulic system failure or leakage or sealing failure of the annular closed cavity has occurred.

[0020] Furthermore, in S5, if the detected hydraulic oil flow rate does not reach the design volume of the hydraulic oil chamber on the current driving side, it is judged that the hydraulic drive piston is still in the movement stage; if the detected displacement data still does not meet the requirements after the hydraulic oil flow rate reaches the standard, it is judged that the annular closed cavity is leaking or the seal fails; if the detected hydraulic oil pressure still does not reach the designed working pressure after the hydraulic oil flow rate and displacement data both reach the standard, it is judged that a hydraulic system failure has occurred.

[0021] The advantages and positive effects of the present invention are:

[0022] The present invention uses three monitoring methods to comprehensively detect different working parameters of the actuator of the quick disengagement device, while ensuring the efficiency of the state switching of the disengagement device, and realizing stable and accurate judgment of its working state, avoiding the influence of human subjective factors on the judgment results, and at the same time reducing the interference of occasional abnormal measurement data or abnormal working state during the execution of the disengagement device on the overall monitoring results, which is conducive to ensuring the smooth, efficient and safe implementation of fracturing construction, and improving the adaptability of offshore fracturing equipment to harsh and changeable environments, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the device embodiment of the present invention in a locked state.

[0024] Figure 2 It is a schematic cross-sectional view of the device embodiment of the present invention in a locked state.

[0025] Figure 3 It is a schematic diagram of the overall structure of the device embodiment of the present invention in a detached state.

[0026] Figure 4 It is a schematic cross-sectional structural diagram of an embodiment of the device of the present invention in a detached state.

[0027] Figure 5 It is a schematic diagram of the overall structure of the clamping claws of an embodiment of the device of the present invention.

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the clamping claw of the embodiment of the device of the present invention.

[0029] Figure 7 It is a schematic diagram of the installation structure of the pressure monitoring device of the embodiment of the device of the present invention.

[0030] Figure 8 It is a schematic diagram of the installation structure of the flow monitoring device of the embodiment of the device of the present invention.

[0031] Figure 9 It is a schematic diagram of the installation structure of the travel monitoring device of the embodiment of the device of the present invention.

[0032] In the picture:

[0033] 1. Connector body; 2. Pressure cap; 3. Set screw;

[0034] 4. First sealing ring; 5. Cylinder body; 6. Second sealing ring;

[0035] 7. First compression spring; 8. First sealing assembly; 9. Second sealing assembly;

[0036] 10. Clamping claw; 11. Second compression spring; 12. Clamping bolt;

[0037] 13. Third sealing assembly; 14. Fourth sealing assembly; 15. Fracturing fluid channel;

[0038] 16. Piston; 17. Bolt; 18. Disconnector;

[0039] 19. Indicator pin; 20. Travel monitoring device; 21. Horizontal part;

[0040] 22. Vertical portion; 23. First travel switch; 24. Second travel switch;

[0041] 25. Mounting base; 26. Flow meter; 27. First pressure sensor;

[0042] 28. Second pressure sensor; 29. First oil port; 30. Second oil port;

[0043] 31. Protrusion; 32. Groove. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0047] The embodiments of the present invention are further described below with reference to the accompanying drawings:

[0048] like Figure 1-4As shown, a pipeline quick disconnect device for an offshore fracturing vessel includes a connector body 1 and a disconnect connector 18. The connector body 1 is a pipeline connector on the fracturing vessel side, and the disconnect connector 18 is a pipeline connector on the drilling platform side. The connector body 1 and the disconnect connector 18 are coaxially sleeved in the cylinder body 5, and a sealed fracturing fluid channel 15 is formed inside the two. Preferably, a third sealing component 13 is provided between the disconnect connector 18 and the connector body 1. Among them, the third sealing component 13 is a combined sealing ring, which can effectively prevent the fracturing fluid in the fracturing fluid channel 15 under high pressure. One end of the cylinder body 5 is fixedly connected to the outer cylindrical surface of the connector body 1, and the other end of the cylinder body 5 is slidably connected to the disconnect connector 18. An annular closed cavity is provided between the outer cylindrical surface of the connector body 1, the outer cylindrical surface of the disconnect connector 18 and the inner cylindrical surface of the cylinder body 5, and a claw 10 and a piston 16 are provided in the annular closed cavity. One end of the claw 10 is fixed to the contact end of the joint body 1 and the detachment joint 18, and the other end of the claw 10 is provided with a protrusion 31. The outer cylindrical surface of the contact end of the detachment joint 18 and the joint body 1 is provided with a groove 32, and the protrusion 31 cooperates with the groove 32. The piston 16 is connected to the driving device. When the driving device drives the piston 16 to move toward the end of the detachment joint 18 until the protrusion 31 completely enters the groove 32, the joint body 1 and the detachment joint 18 are locked. When the driving device drives the piston 16 to move toward the end of the joint body 1 until the protrusion 31 completely disengages from the groove 32, the joint body 1 and the detachment joint 18 are detached. A variety of monitoring components are provided at the piston 16, and the monitoring components are connected to the controller. The controller is connected to the driving device and the fracturing equipment. The various monitoring components monitor the movement of the piston 16 and monitor the locking or detachment status of the joint body 1 and the detachment joint 18.

[0049] The drive device is a device that drives the piston 16 to move. The drive device can be of various structures as long as it achieves the above-mentioned functions. Specifically, the drive device provided in this embodiment is a hydraulic pump station, which is the original hydraulic pump station for fracturing construction. The joint body 1, the disconnect joint 18, the cylinder body 5, and the piston 16 together constitute a complete cylinder structure. The outer cylindrical surface of the cylinder body 5 is provided with a first oil port 29 and a second oil port 30. The first oil port 29 and the second oil port 30 are both connected to the annular closed cavity. The first oil port 29 and the second oil port 30 are respectively connected to the hydraulic pump station. When the hydraulic pump station introduces hydraulic oil into the first oil port 29, the piston 16 moves toward the disconnect joint 18. The hydraulic oil drives the piston 16 to move to the rightmost end of the annular closed cavity, that is, the end position close to the disconnect joint 18, and presses the claw 10 located on the disconnect joint 18 inward, thereby locking the joint body 1 and the disconnect joint 18. If there is still hydraulic oil in the annular closed cavity connected to the second oil port 30, it is discharged through the second oil port 30. When the hydraulic pump station introduces hydraulic oil into the second oil port 30, the piston 16 moves toward the joint body 1, thereby unlocking and disengaging the joint body 1 and the disengagement joint 18. If there is still hydraulic oil in the annular closed cavity connected to the first oil port 29, it will be discharged through the first oil port 29.

[0050] Preferably, a pressure cap 2 is provided between the end of the oil cylinder body 5 close to the joint body 1 and the joint body 1, which is fixedly sleeved with the outer wall of the joint body 1 and the inner wall of the oil cylinder body 5 respectively. The pressure cap 2 is connected to the joint body 1 and the oil cylinder body 5 by trapezoidal threads, and a set screw 3 is provided between the pressure cap 2 and the oil cylinder body 5 for fixing. A first sealing ring 4 is provided between the pressure cap 2 and the joint body 1 for sealing, and a second sealing ring 6 is provided between the pressure cap 2 and the oil cylinder body 5 for sealing. Both the first sealing ring 4 and the second sealing ring 6 can be O-rings. The first oil port 29 can be provided on the pressure cap 2, and a hydraulic oil channel connected to the annular closed cavity is correspondingly provided in the pressure cap 2, which saves the layout space on the oil cylinder body 5 and makes the hydraulic oil injection method in the corresponding cavity more reasonable. At the same time, it disperses the impact force of the oil pressure on the oil cylinder body 5 during the hydraulic oil transportation process, thereby improving the service life and working stability of the device.

[0051] The claw 10 is a device for locking or disengaging the connector body 1 and the disengagement connector 18. The claw 10 can be of various structures as long as it achieves the above-mentioned function. The claw 10 provided in this embodiment is an elastic element. Its end portion located on the disengagement connector 18 can adaptively rotate relative to the axial direction of the disengagement connector 18 under the action of an external force. Thus, under the pressing action of the end portion of the piston 16, the protrusion 31 at the end portion of the claw 10 can cooperate and engage with the groove 32 of the disengagement connector 18, locking and fixing the relative position of the disengagement connector 18 and the connector body 1. When an emergency situation requires disengagement, the hydraulic oil drives the piston 16 to move to the leftmost end of the annular closed cavity, that is, the end position close to the connector body 1. At this time, the end portion of the piston 16 leaves the groove 32 position and no longer compresses the end portion of the claw 10. The end portion of the claw 10 automatically pops out of the groove 32 under the reset action of the elastic element, causing the quick disengagement device to enter the disengagement state, allowing the connector body 1 and its related accessories such as the claw 10, the cylinder body 5, and the piston 16 to be disengaged from the disengagement connector 18.

[0052] Specifically, such as Figure 5 、 Figure 6 As shown, the claw 10 includes multiple circumferentially distributed claw blocks, each of which includes a vertical portion 22 and a horizontal portion 21. The vertical portion 22 and the horizontal portion 21 are arranged in an "L" shape. The vertical portion 22 is in contact with the end face of the joint body 1 and is fixed by a clamping bolt 12. The horizontal portion 21 is in contact with the outer cylindrical surface of the detachable joint 18 and the outer cylindrical surface of the joint body 1. A protrusion 31 is provided at the end of the horizontal portion 21 away from the vertical portion 22. The vertical portion 22 and the horizontal portion 21 are arranged at an acute angle, and a second compression spring 11 is provided between the nut of the clamping bolt 12 and the vertical portion 22.

[0053] In the locked state, the piston 16 moves toward the end of the disengagement connector 18 to the position of the groove 32 and presses the protrusion 31 of the claw block inwardly, so that it engages with the groove 32. In the disengaged state, the vertical portion 22 of the claw block presses the end surface of the connector body 1 under the pressure of the second compression spring 11, so that the protrusion 31 of the claw block completely leaves the groove 32.

[0054] The claw 10 is a split structure, and each claw block is fixed to the end face of the joint body 1 by a clamping bolt 12. After the clamping bolt 12 is tightened, a distance is still reserved between its nut and the end face of the joint body 1 for installing the first compression spring 7. When there is no external force, that is, in the disengaged state, the plane of the vertical portion 22 of each claw block forms a certain angle with the end face of the joint body 1. The angle in this embodiment is α, so that when the vertical portion 22 of the claw block is subjected to pressure from the first compression spring 7, the vertical portion 22 of the claw block rotates in the direction close to the end face of the joint body 1, causing the protrusion 31 of the claw block to rotate outward by a certain angle. At this time, the protrusion 31 of the claw block is completely out of contact with the groove 32 on the disengagement joint 18, that is, the joint body 1 can be smoothly disengaged from the disengagement joint 18. When the quick release device switches to the locking state, the piston 16 moves to the groove 32 position close to the end of the release connector 18 and applies an additional inward force to the protrusion 31 of the claw block, causing it to deform and get stuck in the groove 32, thereby achieving relative locking between the connector body 1 and the release connector 18.

[0055] The piston 16 is slidably sleeved within the annular, sealed cavity. The piston 16 provided in this embodiment adopts a dumbbell-shaped structure, with protrusions 31 at both ends forming the driving end and the locking end, respectively. The driving end and the locking end are connected together by a central connecting rod. The outer wall of the driving end is sleeved with the inner wall of the cylinder body 5, and a first sealing assembly 8 is provided between the driving end and the cylinder body 5. The inner wall of the driving end is sleeved with the outer wall of the joint body 1, and a second sealing assembly 9 is provided between the driving end and the joint body 1. This completely seals the gap between the joint body 1 and the cylinder body 5 at the location of the driving end, forming a sealed first hydraulic oil chamber at this end. A fourth sealing assembly 14 is provided between the locking end and the cylinder body 5, completely sealing the gaps between the locking end, the driving end, and the cylinder body 5, forming a sealed second hydraulic oil chamber between the outer wall of the central connecting rod of the piston 16 and the cylinder body 5. The first oil port 29 and the second oil port 30 are provided corresponding to the first hydraulic oil chamber and the second hydraulic oil chamber, respectively. The first sealing assembly 8 , the second sealing assembly 9 , and the fourth sealing assembly 14 are all standard sealing structures composed of a support ring and a sealing ring.

[0056] Preferably, a first compression spring 7 is provided between the end of the piston 16 close to the joint body 1 and the end of the adjacent annular closed cavity. In the locked state, the piston 16 moves to the extreme position close to the direction of the disengagement joint 18. At this time, the first compression spring 7 is still in a compressed state, which can assist the piston 16 to press against the other end of the annular closed cavity, ensuring the stability and durability of the engagement between the claw 10 and the groove 32, thereby ensuring the stability of the locked state and ensuring the stability and safety of the fracturing construction.

[0057] Preferably, a manual disengagement device is provided on the cylinder body 5. Specifically, the manual disengagement device comprises a plurality of bolts 17, each of which is disposed on the outer end surface of the cylinder body 5 near the disengagement joint 18. Each bolt 17 extends along the axis of the cylinder body 5 into the annular, sealed cavity and is threadably connected to the cylinder body 5. The bolts 17 are disposed directly opposite the end of the piston 16 near the disengagement joint 18. In the event of a malfunction or failure of the hydraulic drive, manual disengagement can be achieved by rotating the bolts 17 inward, causing the ends of the bolts 17 to push the piston 16 inward toward the joint body 1.

[0058] The monitoring component is configured to detect the operating status of the aforementioned oil cylinder. However, a single measurement parameter is prone to measurement errors and measurement device failures during actual measurement, leading to misjudgment of the oil cylinder status and, in turn, various safety issues during fracturing operations or fracturing vessel evacuation operations. Therefore, this embodiment provides three different measurement parameters that, in conjunction with the structure of the quick-release device, perform multi-dimensional detection of the operating status of the oil cylinder. The controller is configured to receive multiple monitoring data from the monitoring component and analyze the locking or disengagement progress, and then use this data as a basis to control the operating status of the hydraulic pump station and fracturing equipment. The fracturing equipment in this embodiment is a fracturing vessel, which can effectively eliminate interference from manual observation and errors in single monitoring data, and consider errors in the internal mechanism of the quick-release device when performing switching operations, which is conducive to accurately determining the progress of the quick-release device state switching, thereby ensuring overall work efficiency and improving the safety of subsequent fracturing operations / evacuation operations.

[0059] Specifically, the monitoring assembly provided in this embodiment includes a pressure monitoring device, a flow monitoring device and a stroke monitoring device 20. The pressure monitoring device detects the real-time oil pressure at the first oil port 29 and the second oil port 30. Specifically, as Figure 7As shown, the pressure monitoring device provided in this embodiment utilizes two pressure sensors, namely, a first pressure sensor 27 and a second pressure sensor 28, which are respectively disposed in oil pipelines connected to a first oil port 29 and a second oil port 30 to monitor the pressures of the first and second oil ports 29 and 30. To ensure stable operation of the hydraulic drive system, the hydraulic pump station has a system rated operating pressure. This pressure ensures that the piston 16 remains stable in its current operating state, abutting against the end of the annular closed cavity. During the movement of the piston 16, the corresponding drive-side oil port should be in an oil-intake state, and its real-time pressure should be lower than the rated operating pressure. Once the piston 16 is in position, the pressure at this port should reach the rated operating pressure. When analyzing the monitoring data from the pressure monitoring device, the difference between the real-time pressure at the drive-side oil port and the rated operating pressure can be used to determine whether the piston 16 has moved into position, i.e., whether the quick release device has entered the locked or disengaged state.

[0060] like Figure 8 As shown, the flow monitoring device detects the hydraulic oil flow through the first oil port 29 or the second oil port 30 during the working state switching process. The flow monitoring device can be a flow meter 26, which is arranged in the oil pipeline connected to the first oil port 29 or the second oil port 30. In this embodiment, a flowmeter 26 is used to detect the flow of hydraulic oil through the first hydraulic oil chamber. Specifically, the flowmeter 26 is installed in the oil pipeline corresponding to the first oil port 29. When oil is supplied to the first oil port 29, driving the piston 16 to the right, the flowmeter 26 measures the amount of oil entering the first hydraulic oil chamber from the time the locking switch command is received and compares it with the volume of the first hydraulic oil chamber. When the piston 16 moves to the right to its limit, the oil volume measured by the flowmeter 26 should reach the volume of the first hydraulic oil chamber. When oil is supplied to the second oil port 30, driving the piston 16 to the left, the flowmeter 26 measures the amount of oil discharged from the first hydraulic oil chamber from the time the disengagement switch command is received and compares it with the volume of the first hydraulic oil chamber. When the piston 16 moves to the left to its limit, the oil volume measured by the flowmeter 26 should reach the volume of the first hydraulic oil chamber. Thus, the flow rate data measured by the flowmeter 26 can be used to determine whether the piston 16 has moved into position, that is, whether the quick release device has entered the locked or disengaged state.

[0061] The travel monitoring device 20 detects the displacement of the piston 16 in the annular closed cavity. The travel monitoring device 20 can use a conventional displacement sensor or other displacement sensing device to detect the real-time displacement of the piston 16. When the displacement of the piston 16 reaches the designed locking / disengaging stroke value, it can be determined that the quick release device has entered the locking or disengaging state. Specifically, Figure 9As shown, the travel monitoring device 20 includes an indicator pin 19. The indicator pin 19 is cylindrical, with one end positioned on the end face of the piston 16 near the disengagement joint 18. The other end of the indicator pin 19 extends outwardly through the end face of the cylinder body 5 as the piston 16 moves. A mounting base 25 is provided below the indicator pin 19. The end of the mounting base 25 is fixed to the end face of the cylinder body 5. Two travel switches are mounted on the mounting base 25 at intervals along the length of the mounting base 25. Each travel switch is positioned directly opposite the axis of the indicator pin 19 and is used to detect whether the indicator pin 19 has reached the corresponding travel position.

[0062] Specifically, the travel switch near the end face of the cylinder body 5 is designated as the first travel switch 23, and the travel switch away from the end face of the cylinder body 5 is designated as the second travel switch 24. Proximity switches are used as the travel switches. The length of the indicator pin 19 and the installation position of the travel switch are designed according to the following principles: in the fully locked state, the outer end of the indicator pin 19 just reaches the detection range of the second travel switch 24; in the fully disengaged state, the outer end of the indicator pin 19 just leaves the detection range of the first travel switch 23. In the fully locked state, when the piston 16 moves toward the disengagement joint 18 to its limit position, the indicator pin 19 extends beyond the end face of the cylinder body 5 to its maximum stroke. At this point, both the first travel switch 23 and the second travel switch 24 have signals. In the fully disengaged state, when the piston 16 moves toward the joint body 1 to its limit position, the indicator pin 19 extends beyond the end face of the cylinder body 5 to its minimum stroke. At this point, both the first travel switch 23 and the second travel switch 24 have no signals. Therefore, whether the piston 16 has moved to the correct position under different working conditions, that is, whether it is completely locked or disengaged, can be determined according to the signal states fed back by the first travel switch 23 and the second travel switch 24 .

[0063] In addition, the indicator pin 19 is arranged at the end of the cylinder body 5 adjacent to the locking end. The space where the segment of the indicator pin 19 is located inside the annular closed cavity is a closed cavity located inside the middle connecting rod of the piston 16. There is no working fluid inside it, which avoids interference with the hydraulic oil drive operation.

[0064] The present invention also provides a method for monitoring the rapid detachment of a pipeline from an offshore fracturing vessel, which utilizes the above-mentioned rapid detachment device for the pipeline from an offshore fracturing vessel, and comprises the following steps:

[0065] S1: Assemble the joint body 1, the claw 10, the cylinder body 5 and the piston 16, and install the monitoring component and the controller.

[0066] S2: dock the connector body 1 with the detachable connector 18, deliver hydraulic oil to the annular closed cavity through the hydraulic pump station, drive the piston 16 to move in the direction of the detachable connector 18, and realize the locking action of the quick detachable device.

[0067] S3: During the locking action, the monitoring data of the monitoring component is collected in real time. First, the displacement data of the piston 16 is used to determine whether the end of the piston 16 has reached the end position of the annular closed cavity close to the disengagement joint 18. If the displacement data meets the requirements, it is then determined whether the hydraulic oil flow entering the annular closed cavity exceeds the design volume of the hydraulic oil cavity on the current drive side. If it exceeds, it is further determined whether the hydraulic oil pressure on the current drive side reaches the designed working pressure. When the measured hydraulic oil pressure value meets the standard, it is determined that the quick disengagement device has entered the locking state.

[0068] Only after the controller determines that the quick release mechanism has entered the locked state will subsequent fracturing instructions be allowed to proceed normally. During the subsequent fracturing operation, to maintain the locked state and ensure its stability, the hydraulic pump station continuously provides hydraulic pressure to the drive side, so that the piston 16 is stably abutted against the end position of the annular closed cavity near the release joint 18, thereby ensuring the locking effect.

[0069] If the detected displacement data does not meet the requirements, it is judged that the hydraulic drive piston 16 is still in the movement stage; if the detected hydraulic oil flow rate still does not reach the design volume of the hydraulic oil chamber on the current driving side after the displacement data meets the standards, it is judged that the quick release device is in an unstable locking state at this time; if the detected hydraulic oil pressure still does not reach the designed working pressure after the displacement data and the hydraulic oil flow rate meet the standards, it is judged that a hydraulic system failure or an annular closed cavity leakage or sealing failure problem occurs at this time, and the locking action needs to be suspended. The system failure must be checked and handled before continuing the original action.

[0070] Among them, if the detected displacement data still does not meet the requirements after the set locking action execution time is exceeded, it is judged that there is leakage in the annular closed cavity or the detached joint 18 is not properly connected. The system fault must be checked and handled before continuing the original action.

[0071] S4: When the high-pressure manifold between the workboat and the drilling platform is disconnected, the quick disconnect device is controlled to execute the disconnection action, and hydraulic oil is correspondingly delivered to the annular closed cavity through the hydraulic pump station to drive the piston 16 to move toward the joint body 1.

[0072] S5: During the execution of the disengagement action, the monitoring data of the monitoring component is collected in real time. First, it is determined whether the flow rate of the hydraulic oil entering the annular closed cavity exceeds the design volume of the hydraulic oil cavity on the current driving side. If it exceeds, the displacement data of the piston 16 is used to determine whether the end of the piston 16 has reached the end position of the annular closed cavity close to the joint body 1. If the displacement data meets the requirements, it is further determined whether the hydraulic oil pressure on the current driving side reaches the designed working pressure. When the measured hydraulic oil pressure value meets the standard, it is determined that the quick disengagement device has entered the disengagement state.

[0073] Only after the controller determines that the quick release mechanism has entered the release state will the subsequent fracturing vessel release instructions be executed normally. Before the joint body 1 and the release joint 18 are completely released, the hydraulic pressure on the drive side must be maintained to prevent the piston 16 from rebounding under the action of the first compression spring 7 and incomplete locking with the release joint 18, which could cause damage to the device and other safety issues.

[0074] If the detected hydraulic oil flow rate does not reach the design volume of the hydraulic oil chamber on the current driving side, it is judged that the hydraulic drive piston 16 is still in the movement stage; if the detected displacement data still does not meet the requirements after the hydraulic oil flow rate reaches the standard, it is judged that there is leakage in the annular closed cavity or seal failure; if the detected hydraulic oil pressure still does not reach the designed working pressure after the hydraulic oil flow rate and displacement data both reach the standard, it is judged that a hydraulic system failure has occurred.

[0075] If the detected hydraulic oil flow rate still does not meet the requirements after the set disengagement execution time has expired, it is determined that there is a foreign object stuck in the annular closed cavity. The fault must be corrected before continuing the original action. When any of the above problems are detected, the disengagement action must be suspended to troubleshoot and correct the system fault before continuing the original action. It is worth noting that in the event of an emergency evacuation, the hydraulic oil pressure delivered by the hydraulic pump station can be directly increased or manual disengagement steps can be performed to ensure that all data meet the requirements before executing the emergency disengagement operation.

[0076] The controller can be integrated into the control system of the fracturing equipment, including the fracturing device body and the driving mechanism of the fracturing vessel, and can realize the coordinated control of the disengagement device and the fracturing equipment. The judgment result of the working status of the rapid disengagement state can be used as a safety signal for controlling the operation of the fracturing equipment, which is conducive to further improving the safety of the fracturing system and avoiding misoperation resulting in situations such as the operating vessel starting to evacuate when the joint body 1 and the disengagement joint 18 are not completely disengaged, and the fracturing operation starting when the joint body 1 and the disengagement joint 18 are not completely locked.

[0077] In the annular closed cavity, the working conditions of the hydraulic oil chamber that drives the piston 16 to move in different directions are different. Therefore, the judgment strategy for the corresponding hydraulic driving state during the locking or disengagement action is also different. A suitable method is used to process and judge the three working parameters obtained by simultaneous monitoring, namely, hydraulic oil pressure, flow and piston 16 stroke. This multi-level judgment method is conducive to ensuring judgment efficiency, that is, ensuring that subsequent fracturing / evacuation operations can be implemented as soon as the working state of the rapid separation device is switched. While improving the overall operating efficiency, it ensures the accuracy and reliability of the judgment results, reduces the interference of occasional abnormal measurement data or abnormal working conditions during the execution of the separation device action on the overall monitoring results, and is conducive to quickly locating the abnormal working state of the rapid separation device, facilitating construction personnel to troubleshoot and quickly handle faults, so as to ensure the smooth progress of subsequent construction.

[0078] The advantages and positive effects of the present invention are:

[0079] The present invention uses three monitoring methods to comprehensively detect different working parameters of the actuator of the quick disengagement device, while ensuring the efficiency of the state switching of the disengagement device, and realizing stable and accurate judgment of its working state, avoiding the influence of human subjective factors on the judgment results, and at the same time reducing the interference of occasional abnormal measurement data or abnormal working state during the execution of the disengagement device on the overall monitoring results, which is conducive to ensuring the smooth, efficient and safe implementation of fracturing construction, and improving the adaptability of offshore fracturing equipment to harsh and changeable environments, and has good application prospects.

[0080] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A pipeline quick release device for an offshore fracturing vessel, characterized by: The invention relates to a novel oil cylinder body, wherein the oil cylinder body is fixedly connected to the outer cylindrical surface of the oil cylinder body, and the other end of the oil cylinder body is slidably connected to the outer cylindrical surface of the oil cylinder body. An annular closed cavity is provided between the outer cylindrical surface of the oil cylinder body, the outer cylindrical surface of the oil cylinder body and the inner cylindrical surface of the oil cylinder body. A claw and a piston are provided in the annular closed cavity. One end of the claw is fixed to the contact end between the oil cylinder body and the oil cylinder body, and the other end of the claw is provided with a protrusion. The outer cylindrical surface of the oil cylinder body and the oil cylinder body are provided with a groove. The protrusion cooperates with the groove. The plug is connected to a driving device. When the driving device drives the piston to move toward the disengagement joint end until the protrusion completely enters the groove, the joint body and the disengagement joint are locked. When the driving device drives the piston to move toward the joint body end until the protrusion completely disengages from the groove, the joint body and the disengagement joint are disengaged. A variety of monitoring components are provided at the piston, and multiple groups of the monitoring components are connected to a controller. The controller is connected to the driving device. The multiple monitoring components monitor the movement status of the piston, thereby monitoring the locking or disengagement status of the joint body and the disengagement joint.

2. The offshore fracturing vessel pipeline quick release device according to claim 1, characterized in that: The driving device is a hydraulic pump station, and a first oil port and a second oil port are provided on the outer cylindrical surface of the oil cylinder body. The first oil port and the second oil port are both connected to the annular closed cavity. The first oil port and the second oil port are respectively connected to the hydraulic pump station. When the hydraulic pump station passes hydraulic oil into the first oil port, the piston moves toward the direction of the disengagement joint; when the hydraulic pump station passes hydraulic oil into the second oil port, the piston moves toward the direction of the joint body.

3. The offshore fracturing vessel pipeline quick release device according to claim 2, characterized in that: The monitoring component includes a pressure monitoring device, a flow monitoring device and a stroke monitoring device. The pressure monitoring device detects the real-time oil pressure at the first oil port and the second oil port. The flow monitoring device detects the hydraulic oil flow through the first oil port or the second oil port during the working state switching process. The stroke monitoring device detects the displacement of the piston in the annular closed cavity.

4. The offshore fracturing vessel pipeline quick release device according to claim 3, characterized in that: The stroke monitoring device includes an indicator pin, which is cylindrical. One end of the indicator pin is placed on the end face of the piston close to the disengagement joint, and the other end of the indicator pin passes out of the end face of the cylinder body as the piston moves outward. A mounting seat is provided under the indicator pin, and the end of the mounting seat is fixed on the end face of the cylinder body. A travel switch is provided on the mounting seat, and the travel switch detects the displacement of the joint body and the disengagement joint to be completely locked or disengaged.

5. The offshore fracturing vessel pipeline quick release device according to any one of claims 1 to 4, characterized in that: The clamping claw includes a plurality of circumferentially distributed clamping claw blocks, and the clamping claw block includes a vertical portion and a horizontal portion. The vertical portion is in contact with the end face of the joint body and is fixed by a tightening bolt, and the horizontal portion is in contact with the outer cylindrical surface of the detachment joint and the outer cylindrical surface of the joint body. The horizontal portion is provided with the protrusion away from the end of the vertical portion, and an acute angle is formed between the vertical portion and the horizontal portion. A second compression spring is provided between the nut of the tightening bolt and the vertical portion.

6. A pipeline quick release device for an offshore fracturing vessel according to any one of claims 1 to 4, characterized in that: A first compression spring is provided in the annular closed cavity, and the first compression spring is placed between the end of the joint body and the piston body.

7. A pipeline quick release device for an offshore fracturing vessel according to any one of claims 1 to 4, characterized in that: A manual disengagement device is provided on the oil cylinder body.

8. A method for monitoring the rapid detachment of a pipeline from an offshore fracturing vessel, utilizing the rapid detachment device for a pipeline from an offshore fracturing vessel according to any one of claims 1 to 7, characterized in that: The following steps are included: S1: Assemble the joint body, claws, cylinder body and piston, and install the monitoring components and controller; S2: docking the connector body with the disconnect connector, delivering hydraulic oil into the annular closed cavity through the hydraulic pump station, driving the piston to move toward the disconnect connector, and realizing the locking action of the quick disconnect device; S3: During the locking action, the monitoring data of the monitoring component is collected in real time. First, the displacement data of the piston is used to determine whether the end of the piston has reached the end position of the annular closed cavity close to the disengagement joint. If the displacement data meets the requirements, it is then determined whether the flow rate of hydraulic oil entering the annular closed cavity exceeds the design volume of the hydraulic oil cavity on the current driving side. If so, it is further determined whether the hydraulic oil pressure on the current driving side reaches the designed working pressure. When the measured hydraulic oil pressure value meets the standard, it is determined that the quick disengagement device has entered the locking state. S4: When the high-pressure manifold between the workboat and the drilling platform is disconnected, the quick disconnect device is controlled to execute a disconnection action, and hydraulic oil is correspondingly delivered into the annular closed cavity through the hydraulic pump station, driving the piston to move toward the joint body; S5: During the execution of the disengagement action, the monitoring data of the monitoring component is collected in real time. First, it is determined whether the flow rate of the hydraulic oil entering the annular closed cavity exceeds the design volume of the hydraulic oil cavity on the current driving side. If it exceeds, the displacement data of the piston is used to determine whether the end of the piston has reached the end position of the annular closed cavity close to the joint body. If the displacement data meets the requirements, it is further determined whether the hydraulic oil pressure on the current driving side reaches the designed working pressure. When the measured hydraulic oil pressure value meets the standard, it is determined that the quick disengagement device has entered the disengagement state.

9. The method for monitoring rapid detachment of pipelines from an offshore fracturing vessel according to claim 8, characterized in that: In S3, if the detected displacement data does not meet the requirements, it is determined that the hydraulic drive piston is still in the movement stage; if the detected hydraulic oil flow rate still does not reach the design volume of the hydraulic oil chamber on the current driving side after the displacement data meets the requirements, it is determined that the quick release device is in an unstable locking state. If the detected hydraulic oil pressure still does not reach the designed working pressure after the displacement data and the hydraulic oil flow rate meet the standards, it is judged that there is a hydraulic system failure or leakage or seal failure in the annular closed cavity.

10. The method for monitoring rapid detachment of pipelines from an offshore fracturing vessel according to claim 8, characterized in that: In S5, if the detected hydraulic oil flow rate does not reach the design volume of the hydraulic oil chamber on the current driving side, it is judged that the hydraulic drive piston is still in the movement stage; if the detected displacement data still does not meet the requirements after the hydraulic oil flow rate reaches the standard, it is judged that the annular closed cavity is leaking or the seal fails; if the detected hydraulic oil pressure still does not reach the designed working pressure after the hydraulic oil flow rate and displacement data both reach the standards, it is judged that a hydraulic system failure has occurred.

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