Foldable top drive guide rail with internally and externally hinged and sleeved parts

Abstract

The foldable top drive guide rail comprises a plurality of sliding rails connected end to end, a hydraulic cylinder and a hoisting piece. Each sliding rail comprises an inner sleeve and an outer sleeve, the inner sleeve at the lowest end is fixedly connected with the outer sleeve in a sleeving mode, the inner sleeves at the other positions are slidably connected with the outer sleeves in a sleeving mode, the adjacent inner sleeves are connected through fixed hinges, and the adjacent outer sleeves are connected through sliding hinges, so that the multiple sliding rails are in a folded state; the end of the inner sleeve at the uppermost end is fixedly connected with the hoisting piece, the fixed end of the hydraulic cylinder is installed on the hoisting piece, the telescopic end of the hydraulic cylinder is connected with the outer sleeve at the uppermost end, and after the sliding rails are converted into the vertical state, the hydraulic cylinder is used for pressing the outer sleeves downwards so that the ends of the outer sleeves in the vertical state can abut against one another. According to the top drive guide rail, the mode of inner and outer double-sleeve supporting structures is adopted, the stability and firmness of the whole top drive guide rail in the vertical state are improved, and the service life of the top drive guide rail is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas exploration technology, and specifically relates to a foldable top drive guide rail with internal and external hinged assembly. Background Technology

[0002] Top drive (top drive unit) is the primary power source in modern drilling and production operations. The top drive assembly is suspended on the traveling block of the drilling rig and rotates the drill pipe. It moves the drill pipe up and down by sliding along longitudinal guide rails. The guide rails guide the wheeled tools of the top drive, enabling its vertical movement. Therefore, it must withstand the loads transmitted by the drill pipe during drilling, such as counter-torque and vibration, and also have a certain length to ensure the drill pipe can be completely pulled out of the wellhead.

[0003] Currently, most top-drive guide rails, both domestically and internationally, connect multiple rail sections using pins until the required length is reached. This conventional rail connection method requires working at heights, posing a high risk and requiring a large workforce. The assembly and disassembly of the guide rails are labor-intensive and time-consuming. The numerous and heavy components, including individual short rails and pins, increase the risk of disintegration, breakage, and falls during construction and use, threatening construction safety.

[0004] Chinese utility model patent (application number: CN202121449785.2) discloses a foldable top-drive quick-installation guide rail, including: a guide rail body, a torsion block, a guide rail hanger, a steel wire rope, and a hoisting rope. The guide rail body is multi-sectioned, and the opposite ends of adjacent guide rail bodies are hinged together by the torsion block, allowing adjacent guide rail bodies to be approached or separated. The guide rail hanger is located at the top and is connected to the derrick crane via the main load-bearing steel wire rope. Steel wire ropes are respectively installed on both sides of the guide rail body. The upper end of the steel wire rope is connected to the guide rail hanger, and the lower end is connected to the guide rail body from top to bottom and fixed to the bottommost guide rail body. The hoisting rope is connected to the topmost guide rail body.

[0005] However, in the aforementioned application, the retraction and extension process relies on steel cables to lift all the guide rails. Although it can be folded, it only includes one set of outer guide rail bodies. Furthermore, relying solely on its own weight to align and fix the guide rails affects the overall stability and anti-torque of the assembled guide rails, which is not conducive to the long-term use of the equipment as a whole. Summary of the Invention

[0006] To address the above problems, this invention proposes a foldable top drive guide rail with internal and external hinge assembly, comprising: several slide rails connected end to end, a hydraulic cylinder, and a lifting component;

[0007] The slide rail includes an inner sleeve and an outer sleeve fitted on the outer wall of the inner sleeve. The inner sleeve at the bottom end is fixedly fitted with the outer sleeve, while the inner sleeves at the rest are slidably fitted with the outer sleeves. The ends of adjacent inner sleeves are connected by a fixed hinge, and the ends of adjacent outer sleeves are connected by a sliding hinge, so that several slide rails can be folded.

[0008] The uppermost inner sleeve end is fixedly connected to the lifting component. The fixed end of the hydraulic cylinder is installed on the lifting component, and the telescopic end of the hydraulic cylinder is connected to the uppermost outer sleeve. The lifting component is used to install on the lifting equipment of the derrick. The lifting equipment lifts several slide rails so that the slide rails change from a folded state to a vertical state. The hydraulic cylinder is used to press down the outer sleeve so that the ends of the several outer sleeves in the vertical state abut against each other to form a sleeve that covers several inner sleeves.

[0009] Furthermore, the inner sleeve has an inner cavity, and the outer wall of the lowest slide rail has a tension oil inlet and a contraction oil inlet. The inner cavity of the inner sleeve has a hydraulic pipe connecting the tension oil inlet to the hydraulic cylinder and the contraction oil inlet to the hydraulic cylinder.

[0010] Furthermore, the hydraulic pipe includes a rigid pipe and a flexible pipe, wherein the flexible pipe is disposed at the fixed hinge, the rigid pipe is disposed inside the inner sleeve, and the two ends of the flexible pipe are respectively connected to the upper and lower ends of the rigid pipe.

[0011] Furthermore, a limiting spring is provided in the middle of the fixed hinge. One end of the limiting spring is connected to the inner wall of the fixed hinge, and the other end of the limiting spring is connected to the middle of the hose. Inside the fixed hinge, there are stop posts on both sides of the limiting spring. The side wall of the stop post abuts against the hose and provides the hose with a force in the opposite direction to that of the limiting spring.

[0012] Furthermore, sliding hinges are provided on both the left and right sides of the end of the outer tube, and outer sliding pins are provided on the side walls of both the left and right sides of the end of the outer tube. The sliding hinges specifically include: outer hinge connecting rods and chain blocks.

[0013] The side wall of the outer hinge link has an elongated hole. One end of the outer hinge link is connected to one end of the chain block by a pin. The other end of the chain block is hinged to the outer sliding sleeve pin on the side wall of the upper outer sleeve. The elongated hole of the outer hinge link and the outer sliding sleeve pin on the side wall of the lower outer sleeve form a sliding connection.

[0014] Furthermore, both the left and right side walls of one end of the outer sleeve are provided with protrusions, and both the left and right side walls of the other end of the outer sleeve are provided with notches that cooperate with the protrusions.

[0015] Furthermore, the inner cross-section of the outer tube adopts a rectangular cavity structure, and reinforcing ribs are provided on both the left and right sides of the outer tube. A predetermined gap is maintained between the reinforcing ribs and the side wall of the outer tube to accommodate the sliding hinge.

[0016] Furthermore, the uppermost outer sleeve is connected to the lifting component via two hydraulic cylinders. The outer wall of the uppermost outer sleeve is fitted with an outer tube shell. Both sides of the outer tube shell have storage cavities for housing the hydraulic cylinders. One end of the hydraulic cylinder is connected to the bottom of the storage cavity, and the other end of the hydraulic cylinder is connected to the lifting component.

[0017] Furthermore, the lifting components include a lifting housing and a lifting handle. One end of the lifting housing is connected to the uppermost end of the inner sleeve and to one end of the hydraulic cylinder. The other end of the lifting housing is detachably installed to one end of the lifting handle, and a pre-drilled hole is provided at the other end of the lifting handle.

[0018] Furthermore, the inner sleeve at the bottom extends into the outer sleeve, and a pin hole is opened at the lower end of the inner sleeve. Anti-slip hooks are installed on the outer wall of the pin hole within the inner cavity of the inner sleeve.

[0019] Compared with the prior art, the embodiments of the present invention have at least the following advantages:

[0020] 1. The foldable top drive guide rail with inner and outer hinges of the present invention adopts a double-support structure with inner and outer sleeves. It is provided with several inner sleeves connected by fixed hinges and several outer sleeves connected by sliding hinges to ensure that adjacent guide rails can be arranged coaxially in a vertical state and avoid misalignment. The outer sleeves are driven to abut against each other by hydraulic cylinders and lifting components to form a sleeve that covers the inner sleeves. Based on the double-support structure, the stability and firmness of the top drive guide rail in a vertical state are improved, and its service life is increased.

[0021] 2. The foldable top drive rail of the inner and outer hinged kit of the present invention can realize quick unfolding and quick folding. All operations can be completed on the ground, which reduces the difficulty of operation, shortens the installation time and folding time, and also reduces the risk of manual intervention and improves the safety of operation.

[0022] 3. The length of a single guide rail section is controllable, and different guide rail lengths can be used according to different needs. At the same time, all the outer tubes of the entire guide rail are connected to each other by sliding hinges and driven by only one set of top hydraulic cylinders. The structure is relatively simple and has good maintainability.

[0023] 4. The top drive guide rail of this invention is in an integrated folded state during transportation and storage. Compared with the traditional top drive guide rail which needs to be stored separately, the integrated design improves the convenience of the guide rail during transportation and ensures the integrity of the device.

[0024] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the foldable top drive rail with inner and outer hinge assembly is shown in an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the folded state of the top drive guide rail in an embodiment of the present invention is shown;

[0028] Figure 3 A schematic diagram of the vertical state of the top drive guide rail in an embodiment of the present invention is shown;

[0029] Figure 4 A schematic diagram of the upper end of the top drive guide rail in an embodiment of the present invention is shown;

[0030] Figure 5 A schematic diagram of the lower end of the top drive guide rail in an embodiment of the present invention is shown;

[0031] Figure 6 A schematic cross-sectional view of the lower end of the top drive guide rail in an embodiment of the present invention is shown. Figure 1 ;

[0032] Figure 7 A schematic cross-sectional view of the lower end of the top drive guide rail in an embodiment of the present invention is shown. Figure 2 ;

[0033] Figure 8 A schematic diagram of the middle section of the top drive guide rail in an embodiment of the present invention is shown. Figure 1 ;

[0034] Figure 9 A schematic diagram of the middle section of the top drive guide rail in an embodiment of the present invention is shown. Figure 2 ;

[0035] Figure 10 A top view of the outer sleeve in an embodiment of the present invention is shown;

[0036] Figure 11 A schematic cross-sectional view of the top drive guide rail in an embodiment of the present invention is shown;

[0037] Figure 12 A schematic diagram of the middle section of the top drive guide rail in an embodiment of the present invention is shown. Figure 3 ;

[0038] Figure 13This diagram illustrates the mid-section of the top drive guide rail in an embodiment of the present invention. Figure 1 ;

[0039] Figure 14 This diagram illustrates the mid-section of the top drive guide rail in an embodiment of the present invention. Figure 2 .

[0040] In the diagram, the components are: slide rail 1, inner sleeve 11, pin hole 1101, anti-slip hook 1102, outer sleeve 12, protrusion 1201, notch 1202, reinforcing rib 1203, outer sleeve 13, hydraulic cylinder 2, lifting component 3, lifting housing 31, lifting handle 32, reserved hole 33, fixed hinge 4, limit spring 41, stop post 42, sliding hinge 5, outer hinge link 51, chain block 52, tension oil inlet 6, contraction oil inlet 7, hydraulic pipe 8, rigid pipe 81, flexible hose 82, and outer sliding sleeve pin 9. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, those skilled in the art can combine different embodiments or examples and features of different embodiments or examples described in this invention without contradiction.

[0043] This invention provides a foldable top drive guide rail with internal and external hinge assembly. Figure 1 A schematic diagram of the foldable top drive rail with inner and outer hinge assembly in an embodiment of the present invention is shown. Figure 1The foldable top-drive guide rail assembly with internal and external hinges includes: several slide rails 1 connected end to end, hydraulic cylinders 2, and lifting components 3. The number and length of the slide rails 1 can be customized according to the actual needs of the site, until the total length of the several slide rails 1 connected end to end reaches the required length on site. At the same time, all the outer sleeves 12 of the entire guide rail 1 are connected to each other by sliding hinges 5 and driven by only one set of top hydraulic cylinders 2. The structure is relatively simple and has good maintainability.

[0044] The slide rail 1 includes an inner sleeve 11 and an outer sleeve 12 sleeved on the outer wall of the inner sleeve 11. The inner sleeve 11 at the bottom end is fixedly sleeved with the outer sleeve 12, while the inner sleeve 11 and the outer sleeve 12 at the rest are slidably sleeved. The ends of adjacent inner sleeves 11 are connected by a fixed hinge 4, and the ends of adjacent outer sleeves 12 are connected by a sliding hinge 5, so that the slide rails 1 can be folded.

[0045] The uppermost inner sleeve 11 is fixedly connected to the lifting component 3. The fixed end of the hydraulic cylinder 3 is installed on the lifting component 3, and the telescopic end of the hydraulic cylinder 2 is connected to the uppermost outer sleeve 12. The lifting component 3 is used to install on the lifting equipment of the derrick. The lifting equipment lifts several slide rails 1 so that the slide rails 1 change from a folded state to a vertical state. The hydraulic cylinder 2 is used to press down the outer sleeve 12 so that the ends of the several outer sleeves 12 in the vertical state abut against each other to form a sleeve that covers several inner sleeves 11.

[0046] In the actual use of the device in this application, the end of the lifting component 3 is connected to the lifting equipment of the derrick. When the lifting equipment of the derrick lifts the lifting component 3 so that the slide rails 1 change from a folded state to a vertical state, the lifting equipment of the derrick fixes the height position of the lifting component 3. When the hydraulic cylinder 2 performs pressurization and extension operations, it will drive the several vertically coaxially arranged outer sleeves 12 to move down synchronously until the ends of the several outer sleeves 12 abut against each other, forming a sleeve that covers the several inner sleeves 11.

[0047] refer to Figure 2 and Figure 3 , Figure 2 This diagram illustrates the folded state of the top drive guide rail in an embodiment of the present invention. Figure 3A schematic diagram of the vertical state of the top drive guide rail in an embodiment of the present invention is shown. In actual use, the foldable top drive guide rail with internal and external hinged assembly proposed in this invention employs several inner sleeves 11 connected end-to-end to form the internal support columns of the top drive guide rail, and several outer sleeves 12 connected end-to-end to form the external support columns of the top drive guide rail. Through the structure of the two sets of support columns, the overall structural robustness and anti-torque force of the top drive guide rail after assembly are greatly improved. After assembling the lifting component 3 with the lifting equipment on the derrick, the lifting equipment lifts the top drive guide rail of this application upwards, ensuring that the inner sleeves 11 and outer sleeves 12 are coaxially arranged and vertically suspended on the derrick. The hydraulic cylinder 2 is activated to press down the outer sleeve 12, causing the ends of several outer sleeves 12 in a vertical position to abut against each other. This allows the several outer sleeves 12 to be spliced ​​together to form a complete sleeve assembly. The sleeve assembly forms a sealed cover around the several inner sleeves 11; that is, the sleeve assembly covers the fixing hinges 4 at the ends of the several inner sleeves 11, causing the fixing hinges 4 to abut against the inner wall of the outer sleeve 12, preventing the several inner sleeves 11 from rotating and thus keeping them in a vertical position. At this point, the several inner sleeves 11 and several outer sleeves 12 cooperate to form a complete top drive guide rail.

[0048] Traditional top drive guide rails require a large amount of manpower for disassembly and assembly, and need to be disassembled into individual guide rail sections for separate storage. Furthermore, since the top drive guide rails are attached to the derrick, workers need to climb to heights during installation and disassembly. In actual operation, this not only involves a large workload but also poses significant risks.

[0049] In the vertical position, the top drive guide rail of this application can be retracted by activating the hydraulic cylinder 2, causing several outer sleeves 12 to move upwards in sequence, exposing the fixing hinges 4 at the ends of several inner sleeves 11. The lifting equipment driving the derrick then drives the guide rails 1 to fold and retract from bottom to top in sequence. Compared with the traditional top drive guide rail installation and disassembly operations, this is more convenient and has a higher safety factor. The integrated structural design further enhances the ease of use of the guide rails 1.

[0050] The foldable top drive guide rail of the present invention, with its inner and outer hinged assembly, adopts a double-support structure. It is provided with several inner sleeves 11 connected by fixed hinges 4 and several outer sleeves 12 connected by sliding hinges 5, which ensures that adjacent guide rails 1 can maintain coaxial arrangement in the vertical state and avoid misalignment. The outer sleeves 12 are driven to abut against each other by hydraulic cylinders 2 and lifting components 3 to form a sleeve that covers the inner sleeves 11. Based on the double-support structure, the stability and firmness of the top drive guide rail in the vertical state are improved, and its service life is increased.

[0051] The foldable top drive rail of this invention, with its internal and external hinged assembly, allows for rapid unfolding and folding. All operations can be completed on the ground, reducing operational difficulty, shortening installation and folding time, and minimizing the risk of manual intervention, thus improving operational safety. The top drive rail of this invention is folded as a single unit during transportation and storage. Compared to traditional top drive rails that require separate storage, the integrated design enhances the convenience of transporting the rail 1 and ensures the integrity of the device.

[0052] refer to Figure 5 and Figure 6 , Figure 6 A schematic cross-sectional view of the lower end of the top drive guide rail in an embodiment of the present invention is shown. Figure 1 Both the inner sleeve 11 and the outer sleeve 12 have rectangular cross-sections. The inner sleeve 11 has an internal cavity, and the outer wall of the lowest slide rail 1 has a tension oil inlet 6 and a contraction oil inlet 7. The inner cavity of the inner sleeve 11 contains a hydraulic pipe 8 connecting the tension oil inlet 6 to the hydraulic cylinder 2 and the contraction oil inlet 7 to the hydraulic cylinder 2. The hydraulic pipe 8 connects to an external hydraulic source, allowing for the control of the extension and retraction of the hydraulic cylinder 2. By placing the hydraulic pipe 8 within the inner cavity of the inner sleeve 11, the routing of the hydraulic pipe 8 is limited, preventing tangled wiring. The inner sleeve 11 and outer sleeve 12 also protect the hydraulic pipe 8, preventing it from colliding with external objects. This provides a designated storage location for the hydraulic pipe 8, eliminating the need for additional collection and organization, thus improving the overall integrity of the device and ease of use.

[0053] In actual use, when several slide rails 1 need to be in a vertical state, the external hydraulic source injects oil through the extension oil inlet 6 on the bottom slide rail 1 and discharges oil through the retraction oil inlet 7; when several slide rails 1 need to be in a folded state, the external hydraulic source injects oil through the retraction oil inlet 7 on the bottom slide rail 1 and discharges oil through the extension oil inlet 6, which improves the accuracy and safety of controlling the extension and retraction of the hydraulic cylinder 2, and at the same time improves the convenience of the lifting and lowering movement of several outer sleeves 12.

[0054] refer to Figure 11 , Figure 11 A cross-sectional view of the top drive guide rail in an embodiment of the present invention is shown. The hydraulic pipe 8 in this application includes a rigid pipe 81 and a flexible pipe 82, wherein the flexible pipe 82 is disposed at the fixed hinge 4 to meet the requirement of hinged connection between adjacent inner sleeves 11. The rigid pipe 81 is disposed inside the inner sleeve 11, and the position of the rigid pipe 81 can be fixed by installing a fixing member connected to the rigid pipe 81 on the inner wall of the inner sleeve 11, so that the rigid pipe 81 and the inner sleeve 11 form an integral whole, avoiding collision between the rigid pipe 81 inside the inner sleeve 11 and the inner wall of the inner sleeve 11.

[0055] Furthermore, both ends of the hose 82 are connected to the ends of the upper and lower rigid pipes 81 respectively. In order to improve the convenience of later maintenance and replacement of the hydraulic pipe 8, the connection between the end of the hose 82 and the end of the rigid pipe 81 can be a threaded connection.

[0056] Correspondingly, in order to better limit the position of the hose 82, a limiting spring 41 is provided in the middle of the fixed hinge 4. One end of the limiting spring 41 is connected to the inner wall of the fixed hinge 4, and the other end of the limiting spring 41 is connected to the middle of the hose 82. Furthermore, there are stop posts 42 on both sides of the limiting spring 41 inside the fixed hinge 4. The side wall of the stop post 42 abuts against the hose 82 and provides the hose 82 with a force in the opposite direction to that of the limiting spring 41.

[0057] like Figure 11 The example shown illustrates the situation when several slide rails 1 are in a vertical position, assuming several slide rails 1 are placed horizontally. The limiting spring 41 located inside the fixed hinge 4 and the two stop posts 42 are in the upper and lower positions respectively. The limiting spring 41 is connected to the middle of the hose 82, and both sides of the hose 82 abut against the side walls of the stop posts 42. The limiting spring 41 is in its initial state and exerts an upward force on the hose 82, causing the hose 82 between the two stop posts 42 to bulge towards the limiting spring 41.

[0058] When several guide rails 1 are folded, the limiting spring 41 is connected to the middle of the hose 82, and the two stop posts 42 are arranged vertically. At the same time, the rigid tubes 81 in the inner sleeves 11 at both ends of the hose 82 will respectively correspond to the tension generated at both ends of the hose 82, so that the hose 82 between the two stop posts 42 is in a straight state. At this time, the limiting spring 41 is in a stretched state, generating tension on the middle of the hose 82, keeping the hose 82 in a taut state. That is, in the folded state of the top drive guide rail of this application, the hose 82 is kept in a taut state, the position of the hose 82 is limited, and the hose 82 is prevented from swinging, which would affect the arrangement and recycling of several guide rails 1.

[0059] It should be noted here that during the process of converting several slide rails 1 from a vertical state to a folded state, it must be done along the folding direction so that when several slide rails 1 are in the folded state, one end of the limiting spring 41 is connected to the inner wall of the fixed hinge 4, and the other end of the limiting spring 41 is connected to the middle of the hose 82, so as to avoid squeezing or damaging the hydraulic hose 82.

[0060] refer to Figure 13 and Figure 14 The diagram shows a partial dissection of the top drive guide rail in an embodiment of the present invention. Sliding hinges 5 are provided on both the left and right sides of the end of the outer sleeve 12, and outer sliding pins 9 are provided on the side walls of both the left and right sides of the end of the outer sleeve 12. The sliding hinge 5 specifically includes: an outer hinge link 51 and a chain block 52.

[0061] The side wall of the outer hinge link 51 has an elongated hole extending along the extension direction of the outer hinge link 51, and one end of the outer hinge link 51 is connected to one end of the chain block 52 by a pin. The other end of the chain block 52 is hinged to the outer sliding sleeve pin 9 on the side wall of the upper outer sleeve 12. The elongated hole of the outer hinge link 51 and the outer sliding sleeve pin 9 on the side wall of the lower outer sleeve 12 form a sliding sleeve connection.

[0062] This ensures that the relative position of the outer hinge link 51 and the upper outer sleeve 12 remains fixed, while the relative position of the outer hinge link 51 and the lower outer sleeve 12 can be changed. That is, when several slide rails 1 are in a folded state, the outer sliding pin 9 of the lower outer sleeve 12 is located at the position furthest from the corresponding chain block 52 in the elongated hole of the upper outer hinge link 51.

[0063] After the hoisting equipment of the derrick lifts several slide rails 1 to change them from a folded state to a vertical state, before the hydraulic cylinder 2 starts working, several outer sleeves 12 are lifted in sequence. The outer sliding pin 9 of the lower outer sleeve 12 is located at the position furthest from the corresponding chain block 52 in the elongated hole of the upper outer hinge link 51, and the total length of the several outer sleeves 12 reaches its maximum value. After the hydraulic cylinder 2 completes the pressurization and extension operation, the outer sliding pin 9 of the lower outer sleeve 12 is located at the position closest to the corresponding chain block 52 in the elongated hole of the upper outer hinge link 51, and the total length of the several outer sleeves 12 reaches its minimum value. That is, the end of the outer sleeve 12 and the end of the adjacent outer sleeve 12 form a tight abutment, forming the sleeve component that covers the several inner sleeves 11.

[0064] Correspondingly, to further improve the stability and firmness of the abutment between the end of the outer sleeve 12 and the end of the adjacent outer sleeve 12, protrusions 1201 are provided on the left and right side walls of one end of the outer sleeve 12, and notches 1202 that cooperate with the protrusions 1201 are provided on the left and right side walls of the other end of the outer sleeve 12. (Refer to...) Figure 8 and Figure 9 In the example shown, the upper end sidewall of the outer sleeve 12 has a protrusion 1201, and the lower end sidewall of the outer sleeve 12 has a notch 1202, both of which are trapezoidal in shape. When the end of the outer sleeve 12 abuts against the end of an adjacent outer sleeve 12, the corresponding notch 1202 and the protrusion 1201 engage with each other. This facilitates positional alignment of the ends of adjacent outer sleeves 12 and improves the stability and strength of the connection between the two sets of outer sleeves 12 after docking.

[0065] Although the above description uses a trapezoidal structure as an example, the structure of the protrusion 1201 and the notch 1202 is not limited to this. The specific shapes of the protrusion 1201 and the notch 1202 can be rectangular, triangular, elliptical, or other structures. Those skilled in the art can comprehensively consider the connection principle of this valve and its actual application, as long as the principle of this invention can be achieved.

[0066] Correspondingly, refer to Figure 10 and Figure 12 The outer sleeve 12 has a rectangular cavity structure inside, with the inner wall of the cavity fitting into the outer wall of the inner sleeve 11. Reinforcing ribs 1203 are provided on both the left and right sides of the outer sleeve 12, and a predetermined gap is maintained between the reinforcing ribs 1203 and the side walls of the outer sleeve 12 to accommodate the sliding hinge 5. That is, when several slide rails 1 are in a vertical state, and after the hydraulic cylinder 2 has completed its extension operation, the sliding hinge 5 can be accommodated in the predetermined gap between the reinforcing ribs 1203 and the side walls of the outer sleeve 12, thus protecting the sliding hinge 5 and preventing corrosion from impurities in the complex working environment. This not only improves the mechanical rigidity of the outer sleeve 12 as a guide rail 1 but also provides space for the sliding hinge 5 between the outer sleeves 12, extending the service life of the guide rails 1.

[0067] refer to Figure 3 and Figure 4 The uppermost outer sleeve 12 is connected to the lifting component 3 via two hydraulic cylinders 2, located on the left and right sides of the outer sleeve 12. An outer sleeve shell 13 is fitted onto the outer wall of the uppermost outer sleeve 12. Each side of the outer sleeve shell 13 has a storage cavity for housing the hydraulic cylinders 2. One end of the hydraulic cylinder 2 is connected to the bottom of the storage cavity, and the other end is connected to the lifting component 3. The storage cavity provides storage space for the hydraulic cylinders 2. During pressurization, the hydraulic cylinder 2 extends from the storage cavity, and during resetting, it retracts back into the storage cavity, causing the lifting component 3 to abut against the end of the uppermost outer sleeve 12.

[0068] refer to Figure 4 , Figure 4 A schematic diagram of the upper end of the top drive guide rail in an embodiment of the present invention is shown. The lifting component 3 includes a lifting housing 31 and a lifting handle 32. One end of the lifting housing 31 is connected to the end of the uppermost inner sleeve 11 and to one end of the hydraulic cylinder 2. The other end of the lifting housing 31 is detachably installed to one end of the lifting handle 32. A reserved hole 33 is provided at the other end of the lifting handle 32. The reserved hole 33 is used for the overlapping of lifting equipment on the derrick.

[0069] In this application, the end face of the hoisting housing 31 and the end face of the outer sleeve 13 have the same area, improving their compatibility when they abut against each other. Furthermore, the uppermost end of the inner sleeve 11 is directly connected to the hoisting housing 31, allowing the hydraulic pipe 8 inside the inner sleeve 11 to extend directly into the hoisting housing 31, forming a hydraulic oil pipeline penetrating the interior of the guide rail 2, thus providing protection for the hydraulic pipe 8. The lifting handle 32 is detachably mounted on the hoisting housing 31. When several slide rails 1 are folded, the lifting handle 32 can be directly removed and stored separately without affecting the overall folding and storage of the slide rails 1, hydraulic cylinders 2, and hoisting housing 31.

[0070] refer to Figure 2 It can be seen that the total length of the uppermost outer sleeve 12 and the hoisting housing 31 is equal to the total length of the adjacent outer sleeve 12. That is, when several slide rails 1 are folded, the two ends of the uppermost outer sleeve 12 and the hoisting housing 31 can be aligned with the two ends of the lower outer sleeve 12, so that the top drive guide rail forms a complete square structure after folding, which is convenient for later handling and storage.

[0071] refer to Figure 7 , Figure 7 A schematic cross-sectional view of the lower end of the top drive guide rail in an embodiment of the present invention is shown. Figure 2 The inner sleeve 11 at the bottom extends into the outer sleeve 12, and the lower end of the inner sleeve 11 has two pin holes 1101 for pin hinge connection with ordinary guide rail. The two pin holes 1101 are arranged vertically, and anti-slip hooks 1102 are fitted on the outer wall of the pin holes 1101 in the inner cavity of the inner sleeve 11. That is, two anti-slip hooks 1102 are installed in the inner cavity of the inner sleeve 11. The anti-slip hooks 1102 are also arranged vertically, and the two anti-slip hooks 1102 are set to different orientations.

[0072] The lower end of the inner sleeve 11 at the bottom can be connected to the top drive transport rail by a pin through the pin hole 1101. An anti-slip hook 1102 is designed at the pin hole 1101. The anti-slip hook 1102 interferes with the pin hole 1101. The inserted pin has a corresponding groove. After assembly, it can prevent the pin from slipping laterally, ensuring the stability and safety of the structure.

[0073] The foldable top drive guide rail of this invention is driven by two hydraulic cylinders 2 at the top to change states. It is in a folded state during storage and transportation. When setting up several guide rails 1, a lifting device is used to lift the top lifting handle 32 through the reserved hole 33, continuously hoisting the guide rails 1 until they are in a vertical state. After the pin hole 1101 on the bottom guide rail 1 is connected to the top drive transport guide rail or other tools and equipment, the external hydraulic station's pipeline is connected through the extension oil inlet 6 and the contraction oil inlet 7. The high-pressure external pipe of the external hydraulic source is assembled with the extension oil inlet 6, and the low-pressure external pipe of the external hydraulic source is assembled with the contraction oil inlet 7. The pistons of the two hydraulic cylinders 22 at the top are driven by an external hydraulic source, so that the pistons of the two hydraulic cylinders 22 are fully extended until the sliding outer sleeve 12 notch and the adjacent protrusions on the guide rail 1 at the bottom end are fully engaged with each other. Each section of the outer sleeve 12 covers the fixed hinge 4 between the inner sleeves 11 of the guide rail. That is, several guide rails 1 are installed to form a continuous facade, which can be put into use.

[0074] When recovering several guide rails 1, first disassemble the external parts on the bottom guide rail 1, then reverse the high and low pressure external pipes, assemble the high pressure external pipe of the external hydraulic source with the shrink oil inlet 7, assemble the low pressure external pipe of the external hydraulic source with the stretch oil inlet 6, inject high pressure oil, so that the piston of the hydraulic cylinder 2 is raised to the maximum height, and after all the outer sleeves 12 reach the highest foldable position, gradually lower the hoisting equipment of the derrick, and fold several guide rails 1 in sequence from bottom to top. After removing the external hydraulic pipe, the recovery of the entire top drive guide rail is completed.

[0075] Example 1:

[0076] This invention proposes a foldable top drive rail with internal and external hinges for moving the top drive device. A total of 6 rail sections are selected for the rail. The bottom rail section 1 can be identified as the first rail section 1, the top rail section 1 as the sixth rail section 1, and so on. The middle rail section 1 includes the second, third, fourth, and fifth rail sections 1.

[0077] The first guide rail 1 has an outer sleeve 12 with a length of 5748mm. The second to fifth guide rail 1 have outer sleeves 12 that are movable and have a length of 6000mm. The sixth outer sliding sleeve is movable and has a length of 4042mm. The hydraulic cylinder 2 at the top and the lifting component 3 do not participate in the movement.

[0078] The foldable top drive guide rail of this application, with its internal and external articulated assembly, is folded during transportation and storage, and remains vertical during use. Compared to segmented drive articulated guide rails, its installation and dismantling require less work and offer a higher safety factor.

[0079] The outer tube 12 of the guide rail 1 is hollow, and there are two built-in hydraulic cylinders 2 and a lifting handle 32 at the top. The hydraulic cylinders 2 drive all the outer tubes 12 to move up and down. The hydraulic cylinders 2 are driven by an external hydraulic control device.

[0080] The external double-sided sliding hinges 5 ensure the spacing between the outer sleeves 12 when retracted and prevent connection failure or falling between adjacent guide rails 1, thus ensuring construction safety. The stroke of each outer sleeve 12 is determined by the stroke of the piston of the hydraulic cylinder 2 and the length of the elongated hole of the outer hinge link 51. In order to meet the requirements of folding after the inner and outer sleeves are pulled open, the total length of several inner sleeves 11 after unfolding is equal to the total length of the outer sleeves 12 after unfolding, and the hinge axis spacing of the fixed hinge 4 is equal to the hinge axis spacing of the sliding hinge 5. Correspondingly, when N guide rails 1 are used, the extension stroke of the hydraulic cylinder 2 must be greater than (N-1) times the extension distance of the sliding hinge 5. In addition, the length of the elongated hole of the outer hinge link 51 in this application is designed with a margin, thereby ensuring the smoothness and coordination of the movement of each outer sleeve 12 and inner sleeve 11 during the retraction and extension of each guide rail 1.

[0081] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0082] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foldable top drive guide rail with internal and external hinge assembly, characterized in that, include: Several slide rails (1) connected end to end, hydraulic cylinders (2) and lifting components (3); The slide rail (1) includes an inner sleeve (11) and an outer sleeve (12) sleeved on the outer wall of the inner sleeve (11). The inner sleeve (11) at the bottom end is fixedly sleeved with the outer sleeve (12), and the inner sleeve (11) at the rest is slidably sleeved with the outer sleeve (12). The ends of adjacent inner sleeves (11) are connected by a fixed hinge (4), and the ends of adjacent outer sleeves (12) are connected by a sliding hinge (5), so that several slide rails (1) can form a folded state. The uppermost inner sleeve (11) is fixedly connected to the lifting component (3). The fixed end of the hydraulic cylinder (2) is installed on the lifting component (3), and the telescopic end of the hydraulic cylinder (2) is connected to the uppermost outer sleeve (12). The lifting component (3) is used to install on the hoisting equipment of the derrick. The hoisting equipment lifts several slide rails (1) so that the several slide rails (1) change from a folded state to a vertical state. The hydraulic cylinder (2) is used to press down the outer sleeve (12) so that the ends of the several outer sleeves (12) in the vertical state abut against each other to form a sleeve that covers several inner sleeves (11).

2. The foldable top drive guide rail with internal and external hinge assembly according to claim 1, characterized in that, The inner sleeve (11) has an inner cavity, and the outer wall of the lowest slide rail (1) has a stretching oil inlet (6) and a contraction oil inlet (7). The inner cavity of the inner sleeve (11) is provided with a hydraulic pipe (8) connecting the stretching oil inlet (6) to the hydraulic cylinder (2) and the contraction oil inlet (7) to the hydraulic cylinder (2).

3. The foldable top drive guide rail with internal and external hinge assembly according to claim 2, characterized in that, The hydraulic pipe (8) includes a rigid pipe (81) and a flexible pipe (82). The flexible pipe (82) is located at the fixed hinge (4), and the rigid pipe (81) is located inside the inner sleeve (11). The two ends of the flexible pipe (82) are respectively connected to the ends of the rigid pipe (81) at the upper and lower ends.

4. The foldable top drive guide rail with internal and external hinge assembly according to claim 3, characterized in that, The fixed hinge (4) is provided with a limiting spring (41) in the middle. One end of the limiting spring (41) is connected to the inner wall of the fixed hinge (4), and the other end of the limiting spring (41) is connected to the middle of the hose (82). The fixed hinge (4) is provided with a stop post (42) on both sides of the limiting spring (41). The side wall of the stop post (42) abuts against the hose (82) and provides the hose (82) with a force in the opposite direction to the limiting spring (41).

5. The foldable top drive guide rail with internal and external hinge assembly according to claim 1, characterized in that, The outer sleeve (12) is provided with sliding hinges (5) on both the left and right sides of the end, and the sidewalls on both the left and right sides of the end of the outer sleeve (12) are provided with outer sliding pins (9). The sliding hinge (5) specifically includes: outer hinge link (51) and chain block (52). The side wall of the outer hinge link (51) has an elongated hole. One end of the outer hinge link (51) is connected to one end of the chain block (52) by a pin. The other end of the chain block (52) is hinged to the outer sliding pin (9) on the side wall of the upper outer sleeve (12). The elongated hole of the outer hinge link (51) and the outer sliding pin (9) on the side wall of the lower outer sleeve (12) form a sliding connection.

6. The foldable top drive guide rail with internal and external hinge assembly according to claim 5, characterized in that, The outer sleeve (12) has protrusions (1201) on both the left and right side walls at one end, and notches (1202) on both the left and right side walls at the other end of the outer sleeve (12) to cooperate with the protrusions (1201).

7. The foldable top drive guide rail with internal and external hinge assembly according to claim 6, characterized in that, The inner cross section of the outer tube (12) adopts a rectangular cavity structure. The left and right sides of the outer tube (12) are provided with reinforcing ribs (1203). A predetermined gap is maintained between the reinforcing ribs (1203) and the side wall of the outer tube (12) to accommodate the sliding hinge (5).

8. The foldable top drive guide rail with internal and external hinge assembly according to claim 1, characterized in that, The uppermost outer sleeve (12) is connected to the lifting component (3) through two hydraulic cylinders (2). The outer wall of the uppermost outer sleeve (12) is fitted with an outer tube shell (13). The left and right sides of the outer tube shell (13) are provided with storage cavities for storing the hydraulic cylinders (2). One end of the hydraulic cylinder (2) is connected to the bottom of the storage cavity, and the other end of the hydraulic cylinder (2) is connected to the lifting component (3).

9. The foldable top drive guide rail with internal and external hinge assembly according to claim 8, characterized in that, The lifting component (3) includes a lifting housing (31) and a lifting handle (32). One end of the lifting housing (31) is connected to the end of the uppermost inner sleeve (11) and to one end of the hydraulic cylinder (2). The other end of the lifting housing (31) is detachably installed to one end of the lifting handle (32). A reserved hole (33) is provided at the other end of the lifting handle (32).

10. The foldable top drive guide rail with internal and external hinge assembly according to claim 1, characterized in that, The inner sleeve (11) at the lowest end extends out to the outer sleeve (12), and a pin hole (1101) is provided at the lower end of the inner sleeve (11), and anti-slip hooks (1102) are fitted on the outer wall of the pin hole (1101) in the inner cavity of the inner sleeve (11).

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