A well servicing rig free dismounting top drive guide rail assembly

Abstract

The application discloses a well repair machine disassembly-free top drive guide rail assembly and belongs to the technical field of well repair equipment. The well repair machine comprises an upper derrick and a lower derrick, the upper derrick is arranged on the lower derrick in a lifting and sliding mode, an upper track is arranged on the upper derrick, a lower track is configured to be relatively movable with the upper track, and the upper track is parallel to the lower track. The top drive has a first guide part and a second guide part, the first guide part is used for sliding guidance on the upper track, and the second guide part is used for sliding guidance on the lower track. The technical scheme provided by the application realizes the simplification of the installation and disassembly of pipelines, top drives and other structures when the well repair machine changes from a well repair state to a transfer state by the relative movement and parallelism of the upper track and the lower track and the sliding guidance of the top drive on the tracks by the first guide part and the second guide part.

Description

Technical Field

[0001] This invention belongs to the field of well workover equipment technology, specifically relating to a top drive guide rail assembly for a well workover rig that does not require disassembly. Background Technology

[0002] In the field of oil and gas exploration and development, as shallow oil and gas resources gradually decrease, the focus of development is shifting towards deep wells, ultra-deep wells, and complex well conditions. This shift means that well workover operations face more stringent working conditions, placing higher demands on the automation level, operational efficiency, and safety performance of workover equipment.

[0003] Traditional workover rigs equipped with top drive systems typically employ a split-type guide rail assembly. In actual operations, when transportation, installation, or relocation are involved, the workover rig must be changed from workover mode to relocation mode, necessitating the disassembly and reassembly of the guide rail assembly. This process requires the traditional top drive guide rail to be mounted on the derrick, involving not only the disassembly and reassembly of the guide rail itself but also the tedious installation and disassembly of related pipelines, the top drive, and other structures.

[0004] This traditional operating method has several drawbacks. First, the process is cumbersome and highly dependent on the operator's professional skills. Each step requires precise control; otherwise, improper installation can easily occur, affecting the normal operation of the equipment. Second, this work involves working at heights, posing significant safety hazards. Operators performing complex disassembly and assembly operations at heights are prone to falls and other accidents if they make a mistake, endangering their lives. Third, equipment relocation efficiency is low. The time-consuming and labor-intensive disassembly and assembly process significantly increases on-site work time, while also increasing the operator's workload and reducing overall work efficiency. Fourth, frequent reassembly and disassembly can lead to a decrease in the precision of the guide rail structure and accelerated wear on the connecting parts. This not only affects the overall stability of the equipment but also shortens its lifespan, increases maintenance costs, and necessitates equipment replacement frequency.

[0005] In conclusion, to meet the high standards required for well workover operations in current oil and gas development, it is highly necessary to develop a workover rig top drive guide rail assembly that does not require disassembly. This assembly will effectively solve many problems existing in traditional operation methods and improve the safety, efficiency, reliability, and service life of workover operations. Summary of the Invention

[0006] The purpose of this invention is to provide a top drive guide rail assembly for a workover rig that does not require disassembly, so as to simplify the installation and disassembly of pipelines, top drives and other structures when the workover rig changes from workover state to transfer state.

[0007] To achieve the above objectives, embodiments of the present invention provide a workover rig top drive guide rail assembly that does not require disassembly, comprising: An upper derrick and a lower derrick, wherein the upper derrick is slidably and vertically mounted on the lower derrick; The upper track and the lower track are provided, the upper track is mounted on the upper derrick, and the lower track is configured to be movable relative to the upper track and to be parallel to the lower track. The top drive has a first guide portion and a second guide portion, the first guide portion being used for sliding guidance on the upper section of the track, and the second guide portion being used for sliding guidance on the lower section of the track.

[0008] For example, at least one embodiment of this disclosure provides a workover rig top drive guide rail assembly that does not require disassembly, wherein the line connecting the first guide portion and the second guide portion is perpendicular to the length direction of the upper rail section.

[0009] For example, at least one embodiment of this disclosure provides a workover rig top drive rail assembly that does not require disassembly, which further includes: A lower rail fixing bracket is used to install on the lower part of the lower well frame and to fix the lower end of the lower rail section for use in fixing the lower rail section during well repair.

[0010] For example, at least one embodiment of this disclosure provides a workover rig top drive guide rail assembly that does not require disassembly, which further includes a rail guide assembly for sliding guidance between the upper rail section and the lower rail section, including: Rail guide groove, which is disposed on the lower section of track; A rail guide block is provided on the upper section of the track, and there are several rail guide blocks arranged sequentially along the length of the upper section of the track. The rail guide block is used for sliding guidance within the rail guide groove.

[0011] For example, at least one embodiment of this disclosure provides a workover rig top drive guide rail assembly that does not require disassembly. The lower end of the upper rail section has an upper rail flared section, and the upper end of the lower rail section has a lower rail flared section. The lower rail flared section is higher than the upper rail flared section, thereby causing the upper rail section and the lower rail section to have an overlapping section.

[0012] For example, at least one embodiment of this disclosure provides a workover rig top drive guide rail assembly that does not require disassembly, wherein at least two guide rail blocks are provided at the overlapping section position.

[0013] For example, at least one embodiment of this disclosure provides a workover rig top drive rail assembly that does not require disassembly, which further includes: The upper rail is fixed on the upper derrick via the upper rail fixing frame.

[0014] For example, at least one embodiment of this disclosure provides a workover rig top drive rail assembly that does not require disassembly. The length direction of the upper rail section and the length direction of the upper derrick have an angle of 3° to 5°. During workover, the length directions of the upper rail section and the lower rail section remain vertical, and the length direction of the upper derrick maintains an angle of 3° to 5° with the vertical direction.

[0015] For example, at least one embodiment of this disclosure provides a workover rig top drive rail assembly that does not require disassembly, which further includes: A top-drive transport fixing frame, which is used to be installed on the lower part of the lower track during relocation; Transverse guide wheels: The top drive transport fixing frame is equipped with several transverse guide wheels; The drilling rig base is used to place on the ground. When the top drive transport fixing frame is assembled or disassembled, the drilling rig base can be equipped with a transverse guide groove, and the transverse guide wheel is used to roll in the transverse guide groove.

[0016] For example, at least one embodiment of this disclosure provides a workover rig top drive rail assembly that does not require disassembly, which further includes: The main vehicle, with the lower derrick articulated on the main vehicle; The second-level platform is rotatably mounted on the upper derrick.

[0017] The significant technical effects of the embodiments of the present invention are as follows: By employing a structural design where the upper and lower rails move relative to each other while remaining parallel and non-collinear, and combining this with the top drive's sliding guidance via the first and second guide sections on the rails, the top drive and guide rails are transported and installed as an integrated unit with the workover rig derrick. This design eliminates the need for operators to perform tedious disassembly and assembly operations at heights, fundamentally reducing the likelihood of falls and other safety accidents, and significantly improving the safety of workover operations. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the workover rig top drive guide rail assembly without disassembly in one embodiment of the present invention; Figure 2 for Figure 1 A magnified schematic diagram of part of the structure of A in the middle; Figure 3 for Figure 1 A magnified schematic diagram of the partial structure of B in the middle section; Figure 4 for Figure 1 A magnified schematic diagram of the C-shaped structure. In the diagram: Upper derrick 100, Lower derrick 200, Upper track section 300, Rail guide block 310, Upper rail flared section 320, Upper rail fixing frame 330, Lower track section 400, Rail guide groove 410, Lower rail flared section 420, Top drive 500, First guide section 510, Second guide section 520, Lower rail fixing frame 600, Top drive transport fixing frame 700, Lateral guide wheel 710, Drilling platform base 800, Lateral guide groove 810, Main vehicle 900, Second-level platform 1000. Detailed Implementation The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0021] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0024] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0025] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation", "connection", "linking", and "fixing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components.

[0026] Please see Figures 1-4 This illustration shows a workover rig top drive guide rail assembly that does not require disassembly, according to an embodiment of the present invention. It includes an upper derrick 100, a lower derrick 200, an upper track 300, a lower track 400, and a top drive 500. The upper derrick 100 is slidably mounted on the lower derrick 200. The upper track 300 is mounted on the upper derrick 100. The lower track 400 is configured to move relative to the upper track 300, and the upper track 300 can be parallel to the lower track 400. The top drive 500 has a first guide portion 510 and a second guide portion 520. The first guide portion 510 is used for sliding guidance on the upper track 300, and the second guide portion 520 is used for sliding guidance on the lower track 400. The line connecting the first guide portion 510 and the second guide portion 520 is perpendicular to the length direction of the upper track 300.

[0027] For example, the upper derrick 100 and the lower derrick 200 ensure structural stability under complex working conditions. The lower derrick 200 is equipped with a slide rail on its side, and high-precision sliders are installed at corresponding positions on both sides of the upper derrick 100. The sliders slide in the slide rail, enabling the upper derrick 100 to move smoothly and accurately on the lower derrick 200.

[0028] The lifting and lowering drive of the upper derrick 100 adopts a hydraulic cylinder drive system. One end of the hydraulic cylinder is hinged to the reinforced fixed seat at the bottom of the lower derrick 200, and the other end is hinged to the connecting seat at the top of the upper derrick 100. The smooth extension and retraction of the cylinder drives the upper derrick 100 to rise and fall along the slide rail.

[0029] The upper track 300 is fixed on the upper derrick 100 and moves together with the upper derrick 100. When the upper derrick 100 extends relative to the lower derrick 200, the upper track 300 slides upward relative to the lower track 400.

[0030] The top drive 500 can have multiple first guide sections 510 and second guide sections 520. The first guide sections 510 and second guide sections 520 are arranged close to each other, and the line connecting them is perpendicular to the length direction of the upper section track 300. This ensures that the upper section track 300 and the lower section track 400 are closer together, thereby ensuring guiding stability.

[0031] When the top drive 500 is located in the upper track 300 area, the rollers of the first guide part 510 roll and guide within the upper track 300; when the top drive 500 descends with the upper derrick 100 into the lower track 400 area, the rollers of the second guide part 520 roll and guide within the lower track 400. The first guide part 510 and the second guide part 520 provide relay guidance on the upper track 300 and the lower track 400, respectively.

[0032] When the top drive 500 is in the upper section, the first guide part 510 can be guided in the upper section track 300. When the top drive is in the lower section, the second guide part 520 can be guided in the lower section track 400. This ensures that after the upper derrick 100 extends and retracts relative to the lower derrick 200, although it will cause the upper section track 300 to change position relative to the lower section track 400, it can still ensure that one of the upper section track 300 and the lower section track 400 will guide the top drive 500. Furthermore, the upper section track 300 and the lower section track 400 are designed to have a certain overlap at the close point, which can achieve a stable connection.

[0033] Alternatively, the first guide part 510 can be designed to be higher than the second guide part 520, thereby achieving an overlap between the upper track 300 and the lower track 400. During the transition process of the top drive 500 sliding from the upper track 300 to the lower track 400, the first guide part 510 can provide more guidance on the upper track 300, and the second guide part 520 can provide more guidance on the lower track 400, increasing the time for both to guide simultaneously and ensuring a smooth transition and stable operation of the top drive 500 at the track connection point.

[0034] During transportation, the workover rig is in a relocation configuration, with the upper derrick 100 retracted into the lower derrick 200. The upper track 300 and lower track 400 are closely spaced, resulting in a compact overall structure that effectively reduces transport volume and center of gravity, facilitating loading and movement by transport vehicles. During workover, the workover rig is in workover mode, with the upper derrick 100 extending relative to the lower derrick 200, simultaneously causing the upper track 300 to extend relative to the lower track 400, forming a complete guide rail system. During this process, the top drive 500 and related pipelines do not need to be disassembled; they are transported and installed directly as part of the derrick, shortening on-site installation time and workload.

[0035] During well workover operations, the top drive 500 moves up and down on the track according to operational requirements. When the top drive 500 is in the area of ​​the upper track 300, the first guide part 510 is in close contact with the upper track 300, providing stable guidance and ensuring that the top drive 500 rises or falls smoothly along the track. When the top drive 500 approaches the overlapping area of ​​the upper track 300 and the lower track 400, the first guide part 510 and the second guide part 520 simultaneously contact the track, jointly undertaking the guidance task and achieving a smooth transition. When the top drive 500 has completely entered the area of ​​the lower track 400, the rollers of the second guide part 520 roll within the lower track 400 for guidance, continuing to ensure the stable operation of the top drive 500. Throughout the operation, the operating status of the top drive 500 is monitored in real time by sensors installed on the track and the top drive, including parameters such as position, speed, and acceleration, and fed back to the control console, allowing operators to adjust operational parameters in a timely manner.

[0036] When relocating after the operation, the workover rig can be switched to relocation mode. The Top Drive 500 and related pipelines do not need to be disassembled and can be transported directly with the derrick, which significantly improves the relocation efficiency.

[0037] This workover rig's non-disassembly top drive guide rail assembly utilizes a structural design where the upper rail 300 and lower rail 400 move relative to each other while remaining parallel and non-collinear. Combined with the top drive 500's sliding guidance via the first guide section 510 and the second guide section 520 on the rails, this allows for integrated transportation and installation of the top drive and guide rails along with the workover rig derrick. This design eliminates the need for operators to perform cumbersome disassembly and assembly operations at heights, fundamentally reducing the possibility of falls and other safety accidents, and significantly improving the safety of workover operations.

[0038] This workover rig's non-disassembly top drive guide rail assembly eliminates the cumbersome disassembly and reassembly process of the guide rail and related pipelines at each stage of the traditional operation. During transportation, its compact structure reduces space occupation and transportation difficulty. Upon arrival at the site, the upper derrick 100 and rails can be quickly deployed via the rapid action of hydraulic cylinders, and the top drive 500 and pipelines can be put into use without disassembly. During relocation, it can also be quickly restored to its transport state. This efficient design shortens installation and relocation time, while reducing the labor intensity of operators, enabling workover operations to be carried out faster and more efficiently, effectively improving overall operational efficiency.

[0039] Traditional workover rigs involve frequent disassembly and reassembly of the guide rails, which can lead to decreased precision in the guide rail structure, accelerated wear at connection points, and consequently affect the overall stability of the equipment. This workover rig's non-disassembly top drive guide rail assembly reduces the number of guide rail disassembly and reassembly operations, achieving stable cooperation between the upper derrick 100 and lower derrick 200, the upper rail section 300 and lower rail section 400, and the top drive 500 and the rails. For example, the overlapping section design of the two rail sections ensures the smoothness of the top drive during rail transitions, improving the overall reliability of the equipment, extending its service life, and reducing maintenance costs and equipment replacement frequency.

[0040] In some examples, a lower rail fixing bracket 600 and a rail guide assembly are also included. The lower rail fixing bracket 600 is installed on the lower part of the lower derrick 200 and can fix the lower end of the lower section rail 400 for use in well workover. The rail guide assembly is used for sliding guidance between the upper section rail 300 and the lower section rail 400, and includes a rail guide groove 410 and a rail guide block 310. The rail guide groove 410 is disposed on the lower section rail 400, and the rail guide block 310 is disposed on the upper section rail 300, and there are several of them arranged sequentially along the length direction of the upper section rail 300. The rail guide block 310 is used for sliding guidance within the rail guide groove 410.

[0041] For example, the shape of the lower rail fixing frame 600 is designed based on the lower structure of the lower derrick 200 and the lower end shape of the lower section rail 400. The whole frame structure has good stability and load-bearing capacity.

[0042] The lower rail fixing bracket 600 and the lower section rail 400 are connected by a detachable design. During well workover operations, the lower rail fixing bracket 600 securely installs the lower end of the lower section rail 400 onto the lower derrick 200, ensuring that the lower section rail 400 will not shift or shake when bearing its own weight, the torque of the top drive 500, and various forces during the well workover operation. This provides a solid foundation for the stable operation of the top drive 500, whose weight is supported by the workover rig's wire rope and pulley system.

[0043] When the workover rig is in workover mode, the upper derrick 100 extends upward from the lower derrick 200, causing the upper track 300 to move relative to the lower track 400. The guide block 310 slides and guides within the guide groove 410. The cooperation between the guide groove 410 and the guide block 310 not only ensures the relative sliding accuracy between the upper track 300 and the lower track 400, but also serves to fix the upper end of the lower track 400.

[0044] Before removing the lower rail fixing frame 600, the top drive transport fixing frame 700 needs to be installed to support the weight of the lower rail section 400. After removing the lower rail fixing frame 600, the lower rail section 400 can slide laterally relative to the lower derrick 200. When the upper derrick 100 retracts relative to the lower derrick 200, the upper rail section 300 drives the rail guide block 310 to slide within the rail guide groove 410, thereby moving the lower rail section 400 and the top drive 500 into the derrick of the lower derrick 200, achieving a compact relocation of the workover rig. This design ensures both the stability of the rail system during workover and the flexibility during relocation.

[0045] In some examples, the lower end of the upper track 300 has an upper rail flare 320, and the upper end of the lower track 400 has a lower rail flare 420. The lower rail flare 420 is higher than the upper rail flare 320, thus creating an overlapping section between the upper track 300 and the lower track 400. At least two rail guide blocks 310 are provided at the overlapping section. An upper rail fixing frame 330 is also included, through which the upper track 300 is mounted on the upper derrick 100.

[0046] For example, the upper rail flare 320 and the lower rail flare 420 are located at the lower end of the upper track 300 and the upper end of the lower track 400, respectively. The upper rail flare 320 and the lower rail flare 420 are flared in shape to facilitate a better transition and connection between the upper track 300 and the lower track 400 in the overlapping section. The lower rail flare 420 is higher than the upper rail flare 320, which allows the upper track 300 and the lower track 400 to form a stable structure in the overlapping section, ensuring the smoothness of the top drive 500 during the transition between the two track sections.

[0047] As the top drive 500 moves from the upper track 300 to the lower track 400, the flared sections 320 and 420 of the upper and lower tracks serve as guides. When the guide section of the top drive 500 approaches the overlapping section, the shape of the flared section guides it smoothly into the overlapping section, preventing jamming or instability caused by abrupt changes at the track joint. Simultaneously, because the lower track flared section 420 is higher than the upper track flared section 320, it increases the contact area and guiding stability between the top drive 500's guide section and the track within the overlapping section, ensuring that the top drive 500 maintains a stable operating state throughout the transition process.

[0048] At least two guide blocks 310 are provided at the overlapping section. These guide blocks 310 are evenly distributed along the length of the upper track 300, which can improve the relative sliding accuracy and stability of the upper track 300 and the lower track 400 at the overlapping section.

[0049] Multiple guide blocks 310 work together in the overlapping section to better withstand the lateral and vertical forces generated by the top drive 500 during the transition. When the top drive 500 passes through the overlapping section, the multiple guide blocks 310 slide and guide simultaneously within the guide groove 410, ensuring that the relative position between the upper track 300 and the lower track 400 is precisely controllable. This further enhances the operational stability of the top drive 500 at the track connection and reduces equipment vibration and wear caused by improper track connection.

[0050] The upper rail fixing frame 330 has multiple connection points, enabling it to be tightly connected to the upper derrick 100 and the upper rail section 300. The upper rail fixing frame 330 is used to fix the upper rail section 300 to the upper derrick 100, providing stable support for the upper rail section 300. During well workover operations, the upper rail section 300 needs to withstand its own weight, the torque of the top drive 500, and various complex forces. The upper rail fixing frame 330 can evenly transmit these forces to the upper derrick 100, ensuring the stability and reliability of the upper rail section 300 during operation.

[0051] In some examples, the length direction of the upper track 300 and the length direction of the upper derrick 100 are at an angle of 3° to 5°. During well repair, the length directions of the upper track 300 and the lower track 400 remain vertical, and the length direction of the upper derrick 100 maintains an angle of 3° to 5° with the vertical direction.

[0052] During well workover, the upper track 300 and the lower track 400 are kept vertical in their length direction to ensure that the top drive 500 can operate stably in the vertical direction and meet the requirements of well workover for the vertical lifting and lowering of the top drive.

[0053] In some examples, the system also includes a top drive transport fixture 700, lateral guide wheels 710, a drill platform base 800, a main trolley 900, and a secondary platform 1000. The top drive transport fixture 700 is installed on the lower section of the track 400 during relocation. Several lateral guide wheels 710 are provided on the top drive transport fixture 700. The drill platform base 800 is placed on the ground and can be fitted with lateral guide grooves 810 during the assembly and disassembly of the top drive transport fixture 700. The lateral guide wheels 710 roll within the lateral guide grooves 810. The lower derrick 200 is hinged to the main trolley 900, and the secondary platform 1000 is rotatably mounted on the upper derrick 100.

[0054] For example, the top drive transport fixture 700 can withstand the weight and vibration of the top drive 500 during transportation. Its shape is designed according to the lower structure of the lower track 400 and the bottom shape of the top drive 500, and it has a frame structure with multiple connection points and support parts.

[0055] The derrick is tilted forward. When the workover rig is moved to a new location, as the upper derrick 100 retracts relative to the lower derrick 200, it moves downward and backward. This causes the upper guide rail 300 to also move backward. The guide block 310 is stuck in the guide groove 410. As the guide block 310 moves downward relative to the guide groove 410, it also drives the lower rail 400 and the top drive 500 to move backward and enter the derrick.

[0056] When the workover rig is transitioned from workover mode to relocation mode, the top drive transport fixture 700 is hoisted to the lower section of the track 400 and secured thereto. The transverse guide wheels 710 of the top drive transport fixture 700 roll within the transverse guide grooves 810 of the drill rig base 800, allowing the lower end of the lower section of the track 400 to smoothly enter the derrick of the lower derrick 200. The omnidirectional design of the transverse guide wheels 710 enables more flexible movement, adapting to different site conditions and operational requirements.

[0057] The drill rig base 800 is a large steel structure platform with sufficient strength and stability. Its dimensions are designed according to the overall layout of the workover rig and site requirements, and it generally has a large area to provide stable support. When disassembling and assembling the top drive transport mounting frame 700, the transverse guide groove 810 needs to be installed on the surface of the drill rig base 800. The transverse guide wheel 710 can roll smoothly in the guide groove and will not fall out. During workover, the transverse guide groove 810 is removed.

[0058] The drilling platform base 800 not only provides a supporting foundation for other components of the workover rig, but its transverse guide groove 810, in conjunction with the transverse guide wheel 710, guides the lower end of the lower track 400 and the top drive 500 to move accurately into the derrick of the lower derrick 200 during the workover rig relocation process, achieving compact storage of the workover rig and facilitating transportation.

[0059] The main vehicle 900 can be a heavy-duty truck or a dedicated workover rig chassis, and the lower derrick 200 is connected to the main vehicle 900 via a high-strength articulation device. The articulation device uses specially designed hinge shafts and spherical bearings, which can withstand the enormous forces exerted by the derrick under different working conditions, while allowing the lower derrick 200 to rotate at a certain angle relative to the main vehicle 900 to adapt to different terrains and operational needs.

[0060] During the transport of the workover rig, the main tractor 900 provides mobility for the entire rig. When the derrick needs to be lowered, the chassis of the main tractor 900 provides stable support, and the lowering and retraction of the derrick is achieved by controlling the hydraulic system or other drive devices. During workover operations, the main tractor 900 can move and position itself according to the wellhead location to ensure accurate positioning of the workover rig. The second-level platform 1000 is rotatably mounted on the upper derrick 100 and can be limited to maintain horizontality during workover.

[0061] When transitioning the workover rig from workover mode to relocation mode, the top drive 500 is first lowered to a low position, the lifting ring clamps are removed, and then the top drive 500 is raised, with the top drive transport fixing frame 700 and the transverse guide groove 810 installed. Afterwards, the top drive 500 is lowered onto the top drive transport fixing frame 700 and secured, the lower rail fixing frame 600 is removed, and the upper derrick 100 is lowered. During the lowering process, the lower section rail 400 and the top drive 500 move downwards along with the upper derrick 100 and the upper section rail 300 into the derrick of the lower derrick 200. After the movement is complete, the top drive 500 is secured to the lower derrick 200 to prevent movement during transport. Subsequently, the second-level platform 1000 is flipped upwards and retracted, and finally, the upper and lower derricks, along with the top drive 500, are lowered onto the main trolley 900. The main trolley 900 then transports the derrick, top drive 500, and other structures as a whole, completing the transition of the workover rig from workover mode to relocation mode. The fold-down design of the 1000-tiered platform reduces space occupation during transportation and improves transportation safety.

[0062] Through the coordinated operation of the top drive transport fixing frame 700, the transverse guide wheel 710, the drilling platform base 800, the main vehicle 900, and the second-level platform 1000, the workover rig can efficiently and safely switch between workover and relocation states, improving the overall efficiency of workover operations and the mobility of the equipment.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of protection of the claims of the present invention.

Claims

1. A top drive guide rail assembly for a workover rig that does not require disassembly, characterized in that, include: An upper derrick (100) and a lower derrick (200) are provided, wherein the upper derrick (100) is slidably mounted on the lower derrick (200); An upper track (300) and a lower track (400) are provided on the upper derrick (100), and the lower track (400) is configured to be movable relative to the upper track (300), and the upper track (300) is parallel to the lower track (400). Top drive (500), the top drive (500) has a first guide portion (510) and a second guide portion (520), the first guide portion (510) is used for sliding guide on the upper section track (300), and the second guide portion (520) is used for sliding guide on the lower section track (400); A top drive transport fixture (700) is used to be installed on the lower part of the lower track (400) during relocation; A number of transverse guide wheels (710) are provided on the top drive transport fixing frame (700). A drill base (800) is used to place on the ground. When the top drive transport fixture (700) is disassembled or assembled, the drill base (800) can be equipped with a transverse guide groove (810), and the transverse guide wheel (710) is used to roll in the transverse guide groove (810). The lower rail fixing bracket (600) is used to be installed on the lower part of the lower derrick (200) and can fix the lower end of the lower section rail (400) for fixing the lower section rail (400) during well repair. Upper rail fixing frame (330), the upper section rail (300) is mounted on the upper derrick (100) via the upper rail fixing frame (330): The upper track (300) has an angle with the length of the upper derrick (100). During well repair, the lengths of the upper track (300) and the lower track (400) remain vertical, and the length of the upper derrick (100) is angled with the vertical direction.

2. The workover rig top drive guide rail assembly without disassembly according to claim 1, characterized in that, The line connecting the first guide section (510) and the second guide section (520) is perpendicular to the length direction of the upper track (300).

3. A workover rig top drive guide rail assembly that does not require disassembly, as described in claim 1, is characterized in that... It also includes a rail guide assembly for sliding guidance between the upper track (300) and the lower track (400), comprising: Rail guide groove (410), the rail guide groove (410) is disposed on the lower section rail (400); The guide block (310) is disposed on the upper section track (300), and there are several of them, and they are arranged sequentially along the length direction of the upper section track (300). The guide block (310) is used for sliding guidance in the guide groove (410).

4. A workover rig top drive guide rail assembly that does not require disassembly, as described in claim 3, is characterized in that... The lower end of the upper track (300) has an upper rail flare (320), and the upper end of the lower track (400) has a lower rail flare (420). The lower rail flare (420) is higher than the upper rail flare (320), so that the upper track (300) and the lower track (400) have an overlapping section.

5. A workover rig top drive guide rail assembly that does not require disassembly, as described in claim 4, is characterized in that... At least two of the aforementioned rail guide blocks (310) are provided at the location of the overlapping section.

6. A workover rig top drive guide rail assembly that does not require disassembly, as described in claim 1, is characterized in that... The angle between the length direction of the upper track (300) and the length direction of the upper derrick (100) is 3°~5°. During well repair, the length direction of the upper derrick (100) maintains an angle of 3°~5° with the vertical direction.

7. A workover rig top drive guide rail assembly that does not require disassembly, as described in claim 1, is characterized in that... Also includes: The main vehicle (900) has the lower derrick (200) hinged to it; The second-level platform (1000) is rotatably mounted on the upper derrick (100).

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