System and method for safe and fast replacement of a rotating assembly

Abstract

The application provides a system and method for safely and quickly replacing a rotating assembly, the system comprising a rotating assembly traction assembly and an electric control locking assembly, the rotating assembly traction assembly comprising, from top to bottom, a conversion connecting short section, an upper joint, a lower joint, a sliding cylinder and an operation unit; the lower joint is provided with a containing chamber on the side, the chamber is provided with an elastic member and a movable clamping block, the movable clamping block is provided with, from bottom to top, a limiting block and an emergency pin, and the movable clamping block can be moved out of the chamber and embedded in the rotating assembly; the sliding cylinder is arranged on the outer side of the upper joint and the lower joint and can move up and down; the operation unit is arranged on the side wall of the upper joint; the electric control locking assembly is arranged outside the housing assembly; the electric control locking assembly comprises a driving motor, a worm gear reducer, a push rod, a locking block connecting piece and a locking block. The method can be realized by the above system, and the method comprises taking out a rotating assembly to be replaced and installing a new rotating assembly. The system of the application has high safety. The method of the application can effectively reduce labor intensity and operation risk.

Description

Technical Field

[0001] This invention relates to the field of rotating assembly technology, and more specifically, to a system and method for safely and quickly replacing rotating assemblies. Background Technology

[0002] As oil and gas exploration and development in my country continues to deepen and accelerate, the risk of drilling leakage caused by multi-pressure systems in formations is constantly increasing. Utilizing the rotary assembly to seal the annulus between the drill string and casing, and implementing underbalanced / controlled pressure drilling operations to appropriately reduce drilling fluid density, can effectively reduce or avoid downhole complications. However, because the rubber core—a crucial component of the rotary assembly—is susceptible to wear, the rotary assembly needs to be replaced periodically during underbalanced / controlled pressure drilling operations.

[0003] Currently, during the removal of the rotating assembly, drilling rig personnel need to lower the slings into position, and then workers must climb to the narrow wellhead, 10 meters above the ground, to pull and attach the slings and manually open the rotating assembly locking device. Once the locking device is open, drilling rig personnel can lift the slings to complete the removal of the rotating assembly. This operation requires skilled teamwork and carries significant safety risks. Therefore, providing a safe and rapid system and method for replacing the rotating assembly is of great importance.

[0004] Chinese patent application number CN202310013408.1, entitled "A Rotary Control Head Lower Sleeve Assembly and J-Slot Retrieval Tool," discloses a J-slot retrieval tool. This tool features multiple J-slots in an upper rotary assembly. The tool connects to a drill rod, and rotation of the drill rod causes the extension or retraction of a locking element within the tool to engage or disengage from the slot. However, in this patent, the process of lowering the tool for J-slot alignment is hampered by internal forces that cause rotational movement within the rotary assembly, requiring repeated blind insertion and alignment, resulting in poor operability. This device differs in structure from this application. Furthermore, this application allows for one-time engagement of the moving locking block with the slot structure after the rotary assembly traction component is lowered into place, eliminating the need for repeated blind insertion and alignment, making it simpler and more feasible to operate. Summary of the Invention

[0005] The purpose of this invention is to address at least one of the aforementioned shortcomings of the prior art. For example, one objective of this invention is to provide a system for safe and rapid replacement of rotating assemblies that is structurally sound, responsive, and easy to operate. Another objective of this invention is to provide a method for safe and rapid replacement of rotating assemblies that avoids dangerous work at heights, reduces manual labor intensity, eliminates the need for manual operation of slings and tools, and is safe and reliable.

[0006] To achieve the above objectives, the present invention provides a system for safely and quickly replacing a rotating assembly. The system may include a rotating assembly traction assembly and an electrically controlled locking assembly. The rotating assembly traction assembly is internally fitted into the rotating assembly, enabling the removal or installation of the rotating assembly. The rotating assembly traction assembly includes a conversion connecting section, an upper connector, and a lower connector connected sequentially from top to bottom, as well as a slide and an operating unit. A receiving chamber is provided on the side of the lower connector. An elastic element and a movable locking block are sequentially arranged from the inside to the outside of the receiving chamber along the radial direction of the lower connector. The elastic element fits against the movable locking block, and the bottom of the elastic element is fixed to the bottom of the movable locking block. A limiting block is provided below the movable locking block to limit its axial movement. An emergency pin is provided below the limiting block to restrict its displacement. An opening is provided on the outer side of the receiving chamber for the movable locking block to... One side can move radially out of the receiving chamber and embed itself into the rotating assembly; the slide cylinder is located outside the upper and lower connectors and can move up and down. The upper part of the slide cylinder is sleeved with the upper connector, and the lower part of the slide cylinder is inserted into the receiving chamber and contacts the moving locking block; the operating unit is located on the side wall of the upper connector to control the movement of the slide cylinder and thus release the traction assembly from the rotating assembly; the electrically controlled locking assembly is located outside the housing assembly of the rotating blowout preventer and can lock or release the rotating assembly from the housing assembly; the electrically controlled locking assembly includes a drive motor, a worm gear reducer, a push rod, a locking block connector, and a locking block; one side of the worm gear reducer is connected to the push rod; the push rod is connected to the locking block connector, and the locking block connector is connected to the locking block; the drive motor is located at the lower end of the worm gear reducer to provide power to the electrically controlled locking assembly and control the operation of the electrically controlled locking assembly.

[0007] According to one or more exemplary embodiments of one aspect of the present invention, a torque sensor may be provided at the upper end of the worm gear reducer to monitor the locking torque, and a displacement sensor may be provided at the lower end of the drive motor to monitor the drive motor speed.

[0008] According to one or more exemplary embodiments of one aspect of the present invention, the drive motor may be provided with a PLC circuit board, which can issue commands to control the drive motor to operate the electronically controlled locking assembly to tighten or loosen the housing assembly.

[0009] According to one or more exemplary embodiments of one aspect of the present invention, the PLC circuit board may be provided with a wireless transmission module, through which remote electronic devices can control the electrically controlled locking component.

[0010] According to one or more exemplary embodiments of one aspect of the present invention, the operating unit may include an operating handle, the upper connector sidewall may be provided with a groove, the upper part of the slide cylinder may be provided with a slide groove, the groove and the slide groove communicate to form a receiving space, and the operating handle is rotatable in the receiving space.

[0011] According to one or more exemplary embodiments of one aspect of the present invention, the elastic element may include an arched spring, the opening may include a trapezoidal opening, the groove may include a rectangular groove, and the slide may include a transverse circular groove.

[0012] According to one or more exemplary embodiments of one aspect of the present invention, the receiving chamber may further include a stepped groove, the stepped groove may include multiple stepped surfaces, and the limiting block and the emergency pin may be respectively disposed on the multiple stepped surfaces; the lower part of the slide cylinder is capable of moving up and down in the stepped groove.

[0013] According to one or more exemplary embodiments of one aspect of the present invention, the stepped groove may include a first stepped surface, a second stepped surface and a third stepped surface arranged sequentially from top to bottom, the emergency pin may be disposed between the second stepped surface and the first stepped surface, and when the rotating assembly traction assembly is engaged with the rotating assembly, the lower end of the slide cylinder is located on the third stepped surface.

[0014] Another aspect of the present invention provides a method for safely and quickly replacing a rotating assembly. This method can be implemented using the system described above for safely and quickly replacing a rotating assembly. A housing assembly can be installed on the outside of the rotating assembly. When the rotating blowout preventer is in operation, the rotating assembly can be locked within the housing assembly by the electrically controlled locking assembly. The method may include the following steps: when removing the rotating assembly to be replaced, connect the drill rod to the rotating assembly traction assembly; the drill rod descends, connecting the rotating assembly traction assembly to the rotating assembly; operate the electrically controlled locking assembly to loosen the rotating assembly from the housing assembly; lift the drill rod, removing the rotating assembly to be replaced and the rotating assembly traction assembly; when installing a new rotating assembly, connect the drill rod to the rotating assembly traction assembly, connecting the rotating assembly traction assembly to the rotating assembly; the drill rod descends, and once the rotating assembly seat is in place, operate the electrically controlled locking assembly to lock the rotating assembly to the housing assembly; rotate the operating unit to decouple the rotating assembly traction assembly from the rotating assembly; lift the drill rod, removing the rotating assembly traction assembly.

[0015] According to one or more exemplary embodiments of another aspect of the present invention, the lower connector may be provided with a lower connector positioning surface contact end on its outer side, and the lower connector positioning surface contact end is located below the receiving chamber; the rotating assembly includes a glue core connector and a glue core, the glue core connector is located at the upper end of the glue core, the rotating assembly traction component can be embedded in the glue core connector and the glue core, the inner circumferential surface of the glue core connector may be provided with a slot to embed the movable card block, and the glue core may be provided with a positioning surface.

[0016] According to one or more exemplary embodiments of another aspect of the present invention, the step of connecting the rotating assembly traction component to the rotating assembly may include: when the movable block begins to contact the rubber core connector, the movable block is squeezed back into the receiving cavity, the movable block transmits force to the elastic member, and the elastic member changes from an initial arched and contracted state to a compressed and elongated state; the drill rod continues to descend, and when the movable block corresponds to the slot position, the movable block is no longer subjected to the squeezing force, the elastic member arches and contracts, one side of the movable block is embedded in the slot, the bottom of the slide cylinder moves to the bottom of the receiving cavity, and the bottom of the positioning surface contact end contacts the positioning surface; the step of deconnecting the rotating assembly traction component from the rotating assembly may include: rotating the operating unit to move the slide cylinder upward, and the movable block is subjected to a component force toward the central axis of the rotating assembly. The moving block transmits the force to the elastic element, which compresses and elongates, causing the moving block to retract from the slot into the receiving cavity, thus releasing the moving block. The steps of the electrically controlled locking assembly to release the rotating assembly and the housing assembly may include: the drive motor issuing a release command, the worm gear reducer rotating, the push rod moving horizontally away from the central axis of the housing assembly, the locking block releasing the housing assembly, and the push rod stopping when it reaches the maximum displacement of the set stroke, thus releasing the housing assembly. The steps of the electrically controlled locking assembly to lock the rotating assembly and the housing assembly may include: the drive motor issuing a locking command, the worm gear reducer rotating, the push rod moving towards the central axis of the rotating assembly, and the push rod stopping when it reaches the locking torque of the set stroke, thus locking the housing assembly.

[0017] According to one or more exemplary embodiments of another aspect of the present invention, the method may further include: if the movable locking block cannot retract into the receiving chamber, the drill rod is struck downward to shear the emergency pin, the limiting block falls, the movable locking block and the elastic element fall, the movable locking block moves downward toward the direction of the central axis of the rotating assembly, retracts into the receiving chamber, and the movable locking block is released.

[0018] Compared with the prior art, the beneficial effects of the present invention include at least one of the following: (1) The system structure of the present invention is reasonable, the response is rapid, and the operation is stable and reliable.

[0019] (2) The system of the present invention relies on pure mechanical force to complete the connection between the rotating assembly traction component and the rotating assembly, realizing the quick engagement of the moving block and the slot. The moving block does not need to be repeatedly aligned with the slot, making the operation convenient and simple.

[0020] (3) The method of the present invention eliminates the need for manual operation of sling tools, avoids dangerous high-altitude operations, reduces labor intensity and improves efficiency, realizes unmanned wellhead operations, and improves the automation level of drilling equipment. Taking pressure-controlled drilling in the Sichuan-Chongqing region as an example, an average of 29 high-altitude operations are required for a single well, and the average wellhead operation time for a single replacement of the rotary assembly can reach 1.5 hours. If this method is used, 43 hours can be saved for a single well. Attached Figure Description

[0021] The above and other objects and features of the present invention will become clearer from the following description taken in conjunction with the accompanying drawings, in which: Figure 1 A schematic diagram illustrating the installation and use of a system for the safe and quick replacement of a rotating assembly, according to an exemplary embodiment of the present invention, is shown.

[0022] Figure 2 A schematic diagram of the structure of an electrically controlled locking assembly according to an exemplary embodiment of the present invention is shown.

[0023] Figure 3 A schematic diagram of the structure of a rotary assembly traction component according to an exemplary embodiment of the present invention is shown.

[0024] Figure 4 A schematic diagram of the rotating assembly traction component of the present invention is shown when the moving card block is extended.

[0025] Figure 5 A schematic diagram of the rotating assembly traction component of the present invention is shown when the moving block is in the retracted state.

[0026] Figure 6 A schematic diagram of the rotating assembly traction component of the present invention is shown when the emergency pin moving block extends.

[0027] Figure 7 A schematic diagram of the rotating assembly traction component of the present invention is shown when the emergency pin moving block retracts after being cut.

[0028] Figure label: 1-Housing assembly, 2-Upper rotating assembly, 21-Upper core connector, 211-Slot, 22-Upper core, 221-Positioning surface, 3-Lower rotating assembly, 4-Electrically controlled locking assembly, 41-Drive motor, 42-Worm gear reducer, 43-Push rod, 44-Locking block connector, 45-Locking block, 46-Torque sensor, 47-Displacement sensor, 5-Rotating assembly traction assembly, 51-Conversion connector Attach the short section, 52-upper connector, 521-groove, 53-lower connector, 531-accommodating chamber, 532-elastic element, 533-moving locking block, 534-first pin, 535-emergency pin, 536-limiting block, 5371-first stepped surface, 5372-second stepped surface, 5373-third stepped surface, 538-lower connector positioning surface contact end, 54-slide cylinder, 541-slide groove, 55-operating handle. Detailed Implementation

[0029] In the following, a system and method for safely and quickly replacing a rotating assembly according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] The terms "first," "second," "third," etc., are used merely for convenience of description and distinction, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Exemplary Example 1 This exemplary embodiment provides a system for safely and quickly replacing a rotating assembly.

[0034] Figure 1 This diagram illustrates the installation and use of a system for the safe and quick replacement of a rotating assembly, according to an exemplary embodiment of the present invention. Figure 2 A schematic diagram of the structure of an electrically controlled locking assembly according to an exemplary embodiment of the present invention is shown. Figure 3 A schematic diagram of the structure of a rotary assembly traction component according to an exemplary embodiment of the present invention is shown. Figure 4 This diagram shows a schematic representation of the rotating assembly traction component of the present invention when the movable card block is extended. Figure 5 This diagram shows the structure of the rotary assembly traction component of the present invention in the retracted state of the moving block. Figure 6 A schematic diagram of the rotating assembly traction component of the present invention is shown when the emergency pin moving block extends after shearing. Figure 7 A schematic diagram of the rotating assembly traction component of the present invention is shown when the emergency pin moving block retracts after shearing. The following is in conjunction with... Figures 1-7 This exemplary embodiment describes a system for the safe and rapid replacement of a rotating assembly.

[0035] like Figure 1 As shown, the system for safe and quick replacement of the rotating assembly mainly includes the rotating assembly traction assembly 5 and the electronically controlled locking assembly 4.

[0036] When the rotating assembly traction component 5 descends and connects to the rotating assembly, the lower section of the rotating assembly traction component 5 is located below the drill table surface. The rotating assembly traction component 5 is internally fitted into the rotating assembly, allowing the rotating assembly to be removed or installed. The electrically controlled locking component 4 is located on the outside of the housing assembly 1 of the rotating blowout preventer, and can lock or release the rotating assembly from the housing assembly. When the rotating assembly needs to be removed, the electrically controlled locking component releases the rotating assembly from the housing assembly; when a new rotating assembly is placed in place, the electrically controlled locking component locks the rotating assembly from the housing assembly. When the rotating blowout preventer is operating, the rotating assembly is locked within the housing assembly by the electrically controlled locking component.

[0037] like Figure 3 As shown, the rotating assembly traction component includes a conversion connecting section 51, an upper connector 52, and a lower connector 53 connected sequentially from top to bottom, as well as a slide cylinder 54 and an operating unit. The lower connector 53 has a receiving chamber 531 on its side. Within the receiving chamber 531, an elastic element 532 and a movable locking block 533 are arranged sequentially from the inside to the outside along the radial direction of the lower connector. The elastic element 532 fits against the movable locking block 533, and the bottom of the elastic element 532 is fixed to the bottom of the movable locking block 533. Here, the elastic element may include an arched spring, the concave surface of which fits against the side of the movable locking block, and the bottom of the arched spring and the bottom of the movable locking block can be fixed by a first pin 534. A limiting block 536 is provided below the movable locking block 533 to limit the axial movement of the movable locking block 533. An emergency pin 535 is provided below the limiting block 536 to limit the displacement of the limiting block 536, and the top of the emergency pin 535 contacts the bottom of the limiting block 536. When the movable block is stuck and cannot retract into the receiving chamber, the emergency pin can be cut to allow the limiting block to fall and release the movable block. An opening is provided on the outer side of the receiving chamber 531, allowing one side of the movable block 533 to move radially out of the receiving chamber 531 and partially embed itself into the rotating assembly. A slot that matches the shape of the embedded side of the movable block can be provided in the rotating assembly. Here, the opening includes a trapezoidal opening, and the slot includes a trapezoidal slot. Furthermore, to connect the rotating assembly traction component to the rotating assembly, the slot can be located on the upper part of the rotating assembly near the tool's machining part. If it is a dual-core assembly, one set of slots can be provided, or two sets of slots can be provided. For example, another set of slots can be provided in the middle of the rotating assembly, which can increase the reliability of removing the rotating assembly. The slide cylinder 54 is located outside the upper connector 52 and the lower connector 53, and is capable of moving up and down. The upper part of the slide cylinder 54 is sleeved with the upper connector 52, and the lower part of the slide cylinder 54 is inserted into the receiving chamber 531 and contacts the moving locking block 533. The operating unit is located on the side wall of the upper connector 52 to control the up and down movement of the slide cylinder 54, thereby controlling the radial movement of the moving locking block 533 to release the traction assembly and the rotating assembly.

[0038] like Figure 2 As shown, the electrically controlled locking assembly includes a drive motor 41, a worm gear reducer 42, a push rod 43, a locking block connector 44, and a locking block 45. One side of the worm gear reducer 42 is connected to the push rod 43, one end of the push rod 43 is connected to the locking block connector 44, and one end of the locking block connector 44 is connected to the locking block 45. The locking block 45 is used to tightly fit against the housing assembly. The drive motor 41 is located at the lower end of the worm gear reducer 42, providing power to the electrically controlled locking assembly and controlling its operation.

[0039] Furthermore, the push rod of the electronically controlled locking assembly can be a T-shaped lead screw with a self-locking function. The lead screw parameters calculated based on the locking torque can fully meet the locking requirements.

[0040] In this exemplary embodiment, a PLC circuit board may be provided in the drive motor. The PLC circuit board can issue commands to control the drive motor, causing the electronically controlled locking component to tighten or loosen the housing assembly.

[0041] Furthermore, the PLC circuit board can be equipped with a wireless transmission module, which enables remote electronic control of the electrically controlled locking assembly. This remote electronic device can include a tablet, etc. The remote electronic device can also include a control center with an HMI and a central controller. The locking torque and maximum displacement are preset in the remote device's control system. During operation, the starter motor pushes the locking block to lock. Once the electrically controlled locking assembly reaches the locking torque or maximum displacement, the motor immediately stops, achieving the locking purpose. The loosening process is the reverse of the locking process. The main technical point of the control system is the real-time detection of torque. According to calculations, the locking torque can ensure that the electrically controlled locking assembly locks the rotating assembly. Because the push rod has a self-locking function, its self-locking capability is much greater than the locking torque, preventing loosening. Therefore, as long as the locking torque meets the locking requirements, the locking purpose can be achieved. During actual operation, the locking force can be automatically detected by torque sensors, etc. Once the locking force is detected to weaken, the system will control the starter motor to press down, thereby ensuring that the locking block operates under a specific pressure.

[0042] In one embodiment of the present invention, multiple electrically controlled locking assemblies can be installed on the outside of the housing assembly of the rotary blowout preventer to lock or release the rotary assembly from the housing assembly, cooperating with the rotary assembly traction assembly to complete the operation of removing or installing the rotary assembly. The electrically controlled locking assemblies can be evenly distributed circumferentially on the outside of the housing assembly; for example, four electrically controlled locking assemblies can be installed on the outside of the housing assembly. The present invention uses electrically driven components instead of hydraulically driven components, resulting in a more accurate and rapid response. Furthermore, the electrically controlled locking assemblies have a self-locking function, improving the overall reliability and stability of the equipment.

[0043] The locking and unlocking steps when replacing the rotating assembly using the electronically controlled locking assembly include: The locking and unlocking strokes of the electrically controlled locking assembly are pre-set in the remote electronic device, including the locking torque and maximum displacement. When it is necessary to release the rotating assembly from the housing assembly, the PLC issues a release command, controls the drive motor to rotate the worm gear reducer, and the push rod moves horizontally away from the central axis of the rotating assembly. The locking block releases the housing assembly. When the push rod reaches the maximum displacement of the set stroke, the push rod stops moving, thus the electrically controlled locking assembly releases the housing assembly, completing the disconnection between the rotating assembly and the housing assembly.

[0044] When it is necessary to lock the rotating assembly and the housing assembly, the PLC issues a locking command, controls the drive motor to rotate the worm gear reducer, and moves the push rod toward the central axis of the rotating assembly. When the push rod reaches the locking torque of the set stroke, the push rod stops moving, and the locking block holds and locks the housing assembly, thus completing the connection between the rotating assembly and the housing assembly.

[0045] If four electrically controlled locking components are installed, during operation, four sets of locking torques and maximum displacements in opposite directions must be preset in the remote system. Locking stops once the electrically controlled locking components reach the locking torque. It should be noted that the direction described in the instruction manual as being away from the central axis of the rotating assembly is... Figure 2 The direction from right to left in the instruction manual, which is the direction toward the central axis of the rotating assembly, is... Figure 2 The direction from left to right in the middle.

[0046] In this exemplary embodiment, as Figure 2 As shown, the electrically controlled locking assembly may also be equipped with a torque sensor 46 and a displacement sensor 47. The torque sensor 46 is located at the upper end of the worm gear reducer 42, and monitors the locking torque by monitoring the torque of the worm gear reducer. The displacement sensor 47 is located at the lower end of the drive motor 41, and monitors the displacement of the push rod by monitoring the speed of the drive motor and calculating the output displacement. The torque sensor and the displacement sensor work together to remotely monitor the on / off status of the electrically controlled locking assembly, enabling remote monitoring of the equipment's operating status and improving the effectiveness of detecting equipment anomalies.

[0047] Furthermore, both the torque sensor and the displacement sensor can be equipped with a wireless transmission module, which enables remote electronic devices to monitor the data of the electronically controlled locking components.

[0048] In this exemplary embodiment, as Figure 3As shown, the operating unit may include an operating handle 55, a groove 521 on the side wall of the upper connector 52, and a slide groove 541 on the upper part of the slide cylinder 54. The groove 521 and the slide groove 541 communicate to form a receiving space, and the operating handle 55 can rotate in the receiving space. Here, the groove may include a rectangular groove, and the slide groove may include a transverse circular groove. When it is necessary to remove the rotating assembly traction component, a certain pressure can be applied to one side of the operating handle by mechanical force or manual force to rotate it to a certain angle away from the central axis of the rotating assembly, so that one side of the operating handle is rotated into the slide groove, controlling the slide cylinder to move vertically upward, causing the moving block to retract into the receiving chamber, and removing the rotating assembly traction component.

[0049] In this exemplary embodiment, the receiving cavity may further include a stepped groove, which may include multiple stepped surfaces, and a limiting block and an emergency pin may be respectively disposed on the multiple stepped surfaces. The lower part of the slide cylinder is capable of moving up and down in the stepped groove. When the rotating assembly traction assembly is connected to the rotating assembly, the bottom of the slide cylinder can move to the bottom of the stepped groove. Further, as Figure 3 As shown, the stepped groove may include a first stepped surface 5371, a second stepped surface 5372, and a third stepped surface 5373 arranged sequentially from top to bottom. An emergency pin 535 may be disposed between the second stepped surface 5372 and the first stepped surface 5371. The slide cylinder 54 may move up and down in the corresponding groove of the third stepped surface 5373. When the rotating assembly traction component is engaged with the rotating assembly, the lower end of the slide cylinder 54 is located on the third stepped surface 5373.

[0050] Exemplary Example 2 This exemplary embodiment provides a method for safely and quickly replacing a rotating assembly.

[0051] The method for safely and quickly replacing the rotating assembly can be implemented by the system for safely and quickly replacing the rotating assembly described in Exemplary Example 1 above.

[0052] like Figure 1 As shown, the rotating assembly of the rotary blowout preventer includes an upper rotating assembly 2 and a lower rotating assembly 3 coaxially arranged. The upper end of the lower rotating assembly 3 is connected to the lower end of the upper rotating assembly 2, and a housing assembly 1 is disposed on the outer side of the lower rotating assembly 3. When the rotary blowout preventer is in operation, the lower rotating assembly 3 is locked into the housing assembly by an electrically controlled locking assembly 4. Figure 3 As shown, the upper rotating assembly may include an upper core connector 21 and an upper core 22, with the upper core connector 21 located at the upper end of the upper core 22. The upper core connector 21 has a slot 211 on its inner circumferential surface to engage a movable locking block, and the upper end surface of the upper core 22 has a positioning surface 221.

[0053] The main methods for safely and quickly replacing a rotating assembly include: removing the rotating assembly to be replaced and installing the new rotating assembly.

[0054] When removing the rotary assembly to be replaced, connect the drill pipe to the conversion connecting section to complete the connection between the drill pipe and the rotary assembly traction assembly. The drill pipe descends, and the rotary assembly traction assembly is lowered into the upper rotary assembly. The rotary assembly traction assembly engages with the upper rotary assembly, completing the connection between the rotary assembly traction assembly and the upper rotary assembly. Operate the electrically controlled locking assembly to loosen the lower rotary assembly from the housing assembly. Lift the drill pipe to remove the rotary assembly to be replaced and the rotary assembly traction assembly.

[0055] When installing a new rotary assembly, connect the drill pipe to the rotary assembly traction component and then connect the rotary assembly traction component to the upper rotary assembly. As the drill pipe descends, once the rotary assembly seat is in place, operate the electrically controlled locking component to lock the lower rotary assembly to the housing assembly. Rotate the operating unit until the rotary assembly traction component is no longer engaged with the upper rotary assembly. Lift the drill pipe and remove the rotary assembly traction component.

[0056] In this exemplary embodiment, as Figure 3 As shown, the lower connector 53 may have a lower connector positioning surface contact end 538 on its outer side, and the lower connector positioning surface contact end 538 is located below the receiving chamber 531. The rotating assembly traction component can be inserted into the upper rubber core connector and the interior of the upper rubber core. When the moving block is inserted into the slot, the lower connector positioning surface contact end contacts the positioning surface, which means that the rotating assembly traction component is connected to the rotating assembly.

[0057] In this exemplary embodiment, the step of connecting the rotating assembly traction component to the upper rotating assembly may include: the rotating assembly traction component descends, and when the moving block begins to contact the upper rubber core connector, the moving block is squeezed to generate a radially upward force toward the central axis of the rotating assembly. The moving block moves toward the central axis of the rotating assembly and retracts into the receiving chamber. The moving block transmits the force to the elastic member, and the elastic member changes from an initial arched and contracted state to a compressed and elongated state. The rotating assembly traction component continues to descend, and when the moving block is located on the circumferential surface of the inner wall of the upper rubber core connector with a slot, the moving block is no longer squeezed by the inner wall of the upper rubber core connector. The elastic member arches and contracts, and the moving block moves away from the central axis of the rotating assembly, passes through the opening of the receiving chamber, and is embedded in the slot of the upper rubber core connector. The bottom of the slide cylinder moves to the bottom of the receiving chamber, and the bottom of the positioning surface of the lower connector contacts the positioning surface of the upper rubber core.

[0058] The steps for removing the rotating assembly traction component may include: applying an upward force to one side of the operating unit to move the slide upward, the moving block receiving a component force in the direction toward the central axis of the rotating assembly, the moving block transmitting this component force to the elastic element, the elastic element compressing and elongating, the moving block moving in the direction toward the central axis of the rotating assembly, the moving block retracting from the slot into the receiving chamber, and the moving block being released.

[0059] The steps for the electronically controlled locking assembly to release the lower rotating assembly from the housing assembly may include: the drive motor issuing a release command, the worm gear reducer rotating, the push rod moving horizontally away from the central axis of the housing assembly, the locking block releasing the housing assembly, and the push rod stopping when it reaches the maximum displacement of the set stroke, thus completing the disconnection of the rotating assembly from the housing assembly.

[0060] The steps of locking the lower rotating assembly and the housing assembly with the electronically controlled locking assembly may include: the drive motor sends a locking command, the worm gear reducer rotates, the push rod moves toward the central axis of the rotating assembly, and when the push rod reaches the locking torque of the set stroke, the push rod stops moving, and the locking block holds and locks the housing assembly, thereby completing the connection between the rotating assembly and the housing assembly.

[0061] In this exemplary embodiment, the method for safely and quickly replacing the rotating assembly may further include: if the movable block is stuck in the slot and cannot retract into the receiving chamber, the drill rod is vibrated downward to shear the emergency pin, the limit block falls, the movable block and the elastic element fall, the movable block moves downward toward the central axis of the rotating assembly, retracts into the receiving chamber, and the movable block is released.

[0062] like Figures 4-7 The specific steps of the method for safely and quickly replacing the rotating assembly, as shown, include: (1) Remove the rotating assembly to be replaced.

[0063] S1. Connect the drill pipe to the conversion connecting section to complete the connection between the drill pipe and the rotary assembly traction component, and the drill pipe descends.

[0064] S2. Lower the rotating assembly traction component into the upper rotating assembly to engage it. Specifically, as the rotating assembly traction component descends, when the moving block 533 begins to contact the upper rubber core connector 21, the moving block 533 is compressed, generating a radial force towards the central axis of the rotating assembly. The moving block 533 moves towards the central axis of the rotating assembly and retracts into the receiving chamber 531. The moving block 533 transmits this force to the elastic element 532, causing the elastic element 532 to change from its initial arched and contracted state to a compressed and elongated state. Figure 5 The diagram shows the movable block retracted within the receiving chamber. As the rotating assembly traction component continues to descend, when the movable block 533 is located on the circumferential surface of the inner wall of the upper rubber core connector 21 with the slot 211, the movable block 533 is no longer compressed by the inner wall of the upper rubber core connector 21. The elastic element 532 arches and contracts, and the movable block 533 moves in a direction away from the central axis of the rotating assembly, passing through the opening of the receiving chamber 531 and embedding into the slot 211 of the upper rubber core connector 21. Figure 4The image shows the movable block extending from the receiving chamber and embedding into the slot. At this time, the bottom of the slide cylinder 54 moves to the bottom of the receiving chamber 531, and the bottom of the lower connector positioning surface contact end 538 contacts the positioning surface 221 of the upper rubber core 22, thus completing the connection between the rotating assembly traction assembly and the rotating assembly.

[0065] S3. Operate the electronically controlled locking assembly to loosen the lower rotating assembly from the housing assembly. Specifically, the drive motor issues a loosening command, the worm gear reducer rotates, and the push rod moves horizontally away from the central axis of the housing assembly. The locking block loosens the housing assembly. Once the push rod reaches its maximum displacement (set stroke), it stops moving, and the locking block loosens the housing assembly, thus disconnecting the rotating assembly from the housing assembly. This allows the rotating assembly traction assembly to remove the rotating assembly to be replaced.

[0066] S4. Raise the drill pipe and remove the rotary assembly and rotary assembly traction component to be replaced.

[0067] (2) Install the new rotating assembly.

[0068] S1. Complete the connection between the drill pipe and the rotary assembly traction component, and complete the connection between the rotary assembly traction component and the upper rotary assembly. Specifically, the rotary assembly traction component moves downward. When the moving block 533 begins to contact the upper rubber core connector 21, the moving block 533 is squeezed, generating a radial force towards the central axis of the rotary assembly. The moving block 533 moves towards the central axis of the rotary assembly and retracts into the receiving chamber 531. The moving block 533 transmits this force to the elastic element 532, and the elastic element 532 changes from the initial arched and contracted state to the compressed and elongated state. As the rotating assembly traction component continues to descend, when the moving block 533 is located on the circumferential surface of the inner wall of the upper rubber core connector 21 with the slot 211, the moving block 533 is no longer squeezed by the inner wall of the upper rubber core connector 21, the elastic element 532 arches and contracts, and the moving block 533 moves away from the central axis of the rotating assembly, passes through the opening of the receiving chamber 531, and embeds into the slot 211 of the upper rubber core connector 21. The bottom of the slide cylinder 54 moves to the bottom of the receiving chamber 531, and the bottom of the lower connector positioning surface contact end 538 contacts the positioning surface 221 of the upper rubber core 22. The connection between the rotating assembly traction component and the rotating assembly is completed.

[0069] S2. The drill pipe moves downwards, positioning the rotary assembly seat.

[0070] S3. Operate the electronically controlled locking assembly to lock the lower rotating assembly and the housing assembly. This step is as follows: control the drive motor to issue a locking command, the worm gear reducer rotates, and the push rod moves towards the central axis of the rotating assembly. When the push rod reaches the locking torque of the set stroke, the push rod stops moving, and the locking block holds and locks the housing assembly, thereby completing the connection between the rotating assembly and the housing assembly.

[0071] S4. Rotate the operating unit to disengage the rotating assembly traction component from the upper rotating assembly. Specifically, this step involves applying an upward force to one side of the operating unit, causing the slide cylinder 54 to move upward. The moving block 533 receives a component force in the direction of the rotating assembly's central axis. The moving block 533 transmits this component force to the elastic element 532, causing the elastic element 532 to compress and elongate. The moving block 533 then moves in the direction of the rotating assembly's central axis, retracting from the slot into the receiving chamber 531. The moving block is then released. Figure 5 The movable locking block is shown retracted into the receiving chamber. Then the drill pipe is lifted to remove the rotary assembly traction component.

[0072] If the movable locking block 533 is stuck in the locking groove 211 and cannot retract into the receiving chamber 531, the drill rod is vibrated downwards to shear off the emergency pin 535. Figure 6 The diagram shows the state where the emergency pin 535 has been sheared and the movable locking block extends out of the receiving chamber. After the emergency pin 535 is sheared, the limiting block 536 falls, and the movable locking block 533 and the elastic element 532 fall. Under the influence of gravity, the movable locking block 533 moves downward toward the central axis of the rotating assembly, smoothly retracting into the receiving chamber 531. The movable locking block is then released, and the corresponding... Figure 7 The diagram shows the state in which the emergency shear pin moves and retracts into the receiving chamber.

[0073] In summary, the advantages proposed by this invention include at least one of the following: (1) The rotary assembly traction component of the present invention is reliable in operation. During the entire process of installing the rotary assembly, the drill rod does not come into contact with the lower rubber core, which avoids premature wear of the lower rubber core and ensures the newness of the lower rubber core before it is put into use.

[0074] (2) The electric locking component of the present invention uses electric drive instead of hydraulic drive, eliminating the need for hydraulic oil. The tightening torque and maximum displacement of the drive motor can be preset. When the drive motor reaches the tightening torque, the tightening stops. The electric locking component has a self-locking function, which improves the reliability and stability of the overall equipment.

[0075] (3) The method of the present invention can avoid operators from repeatedly climbing the wellhead, and at the same time avoids operators from working at heights in limited spaces when installing or replacing rotating assemblies, saving manpower and reducing operational safety risks.

[0076] Although a system and method for safe and quick replacement of a rotating assembly has been described above in conjunction with exemplary embodiments, those skilled in the art will understand that various modifications and changes can be made to the exemplary embodiments of the invention without departing from the spirit and scope defined by the claims.

Claims

1. A system for safely and quickly changing a rotating assembly, characterized in that, The system includes a rotating assembly traction component and an electronically controlled locking component, wherein... The traction assembly for the rotating assembly is internally fitted into the rotating assembly, allowing for the removal or installation of the rotating assembly. The traction assembly includes, from top to bottom, a conversion connecting section, an upper connector, and a lower connector, as well as a slide cylinder and an operating unit. The lower connector has a receiving chamber on its side. Inside the receiving chamber, along the radial direction of the lower connector, an elastic element and a movable locking block are arranged sequentially from the inside to the outside. The elastic element fits into the movable locking block, and the bottom of the elastic element is fixed to the bottom of the movable locking block. A limiting block is provided below the movable locking block to limit its axial movement. An emergency pin is provided below the limiting block to restrict its displacement. An opening is provided on the outer side of the receiving chamber, allowing one side of the movable locking block to move radially out of the receiving chamber and into the rotating assembly. The slide cylinder is located outside the upper and lower connectors and can move up and down. The upper part of the slide cylinder is sleeved with the upper connector, and the lower part of the slide cylinder is inserted into the receiving chamber and contacts the movable locking block. The operating unit is located on the side wall of the upper connector to control the movement of the slide cylinder, thereby releasing the traction assembly from the rotating assembly. An electrically controlled locking assembly is located on the outside of the housing assembly of the rotary blowout preventer, capable of locking or releasing the rotary assembly from the housing assembly. The electrically controlled locking assembly includes a drive motor, a worm gear reducer, a push rod, a locking block connector, and a locking block. One side of the worm gear reducer is connected to the push rod; the push rod is connected to the locking block connector, and the locking block connector is connected to the locking block. The drive motor is located at the lower end of the worm gear reducer, providing power to the electrically controlled locking assembly and controlling its operation. A PLC circuit board is installed in the drive motor, and the PLC circuit board issues commands to control the drive motor to operate the electrically controlled locking assembly to tighten or loosen the housing assembly.

2. The system for safe and quick replacement of the rotating assembly according to claim 1, characterized in that, The worm gear reducer is equipped with a torque sensor at its upper end to monitor the locking torque, and the drive motor is equipped with a displacement sensor at its lower end to monitor the drive motor speed.

3. The system for safe and quick replacement of the rotating assembly according to claim 1, characterized in that, The PLC circuit board is equipped with a wireless transmission module, which enables remote electronic control of the electrically controlled locking component.

4. The system for safe and quick replacement of the rotating assembly according to claim 1, characterized in that, The operating unit includes an operating handle, the upper connector sidewall is provided with a groove, the upper part of the slide cylinder is provided with a slide groove, the groove and the slide groove communicate to form a receiving space, and the operating handle can rotate in the receiving space.

5. The system for safe and quick replacement of the rotating assembly according to claim 4, characterized in that, The elastic element includes an arched spring, the opening includes a trapezoidal opening, the groove includes a rectangular groove, and the slide includes a transverse circular groove.

6. The system for safe and quick replacement of the rotating assembly according to claim 1, characterized in that, The accommodating chamber also includes a stepped groove, which comprises multiple stepped surfaces. The limiting block and the emergency pin are respectively disposed on the multiple stepped surfaces. The lower part of the slide cylinder can move up and down in the stepped groove.

7. The system for safe and quick replacement of the rotating assembly according to claim 6, characterized in that, The stepped groove includes a first stepped surface, a second stepped surface, and a third stepped surface arranged sequentially from top to bottom. The emergency pin is disposed between the second stepped surface and the first stepped surface. When the rotating assembly traction component is engaged with the rotating assembly, the lower end of the slide cylinder is located on the third stepped surface.

8. A method for safely and quickly replacing a rotating assembly, characterized in that, The method is implemented by a system for safe and quick replacement of the rotating assembly as described in any one of claims 1 to 7, wherein a housing assembly is provided on the outside of the rotating assembly, and when the rotating blowout preventer is in operation, the rotating assembly is locked in the housing assembly by the electronically controlled locking assembly; The method includes the following steps: When removing the rotary assembly to be replaced, connect the drill pipe to the rotary assembly traction assembly. The drill pipe descends, and the rotary assembly traction assembly connects to the rotary assembly. Operate the electronic locking assembly to loosen the rotary assembly from the housing assembly. Lift the drill pipe and remove the rotary assembly to be replaced and the rotary assembly traction assembly. When installing a new rotary assembly, connect the drill pipe to the rotary assembly traction assembly, and then connect the rotary assembly traction assembly to the rotary assembly. As the drill pipe descends, once the rotary assembly seat is in place, operate the electrically controlled locking assembly to lock the rotary assembly to the housing assembly. Rotate the operating unit to disconnect the rotary assembly traction assembly from the rotary assembly, then lift the drill pipe and remove the rotary assembly traction assembly.

9. The method for safely and quickly replacing the rotating assembly according to claim 8, characterized in that, The lower connector is provided with a lower connector positioning surface contact end on its outer side, and the lower connector positioning surface contact end is located below the receiving chamber; The rotating assembly includes a core connector and a core. The core connector is located at the upper end of the core. The traction component of the rotating assembly is embedded in the core connector and the core. The core connector has a slot on its inner circumferential surface to engage the movable block. The core has a positioning surface.

10. The method for safely and quickly replacing the rotating assembly according to claim 9, characterized in that, The steps for connecting the rotary assembly traction component to the rotary assembly include: when the moving block begins to contact the rubber core connector, the moving block is squeezed back into the receiving cavity, and the moving block transmits force to the elastic element, which changes from the initial state of arching and contraction to the state of compression and elongation; the drill rod continues to descend, and when the moving block corresponds to the slot position, the moving block is no longer subjected to squeezing force, the elastic element arches and contracts, one side of the moving block is embedded in the slot, the bottom of the slide cylinder moves to the bottom of the receiving cavity, and the bottom of the positioning surface contact end contacts the positioning surface; The step of disconnecting the rotating assembly traction component from the rotating assembly includes: rotating the operating unit to move the slide upward, the moving block receiving a component force in the direction of the rotating assembly's central axis, the moving block transmitting this component force to the elastic element, the elastic element compressing and elongating, the moving block retracting from the slot into the receiving chamber, and the moving block releasing itself. The steps of the electronically controlled locking assembly to release the rotating assembly and the housing assembly include: the drive motor sends a release command, the worm gear reducer rotates, the push rod moves horizontally in a direction away from the central axis of the housing assembly, the locking block releases the housing assembly, and when the push rod reaches the maximum displacement of the set stroke, the push rod stops moving, and the locking block releases the housing assembly; The steps of the electronically controlled locking assembly locking the rotating assembly and the housing assembly include: the drive motor sends a locking command, the worm gear reducer rotates, the push rod moves toward the central axis of the rotating assembly, and when the push rod reaches the locking torque of the set stroke, the push rod stops moving, and the locking block locks the housing assembly.

11. The method for safely and quickly replacing the rotating assembly according to claim 8, characterized in that, The method further includes: If the movable block cannot retract into the receiving chamber, the drill rod is vibrated downwards to shear the emergency pin, the limit block falls, the movable block and the elastic element fall, the movable block moves downwards toward the central axis of the rotating assembly, retracts into the receiving chamber, and the movable block is released.

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