An elevated catwalk

Abstract

This invention relates to the field of oil and gas drilling and workover technology, and particularly to an elevated catwalk, comprising a truss mechanism and a telescopic conveying mechanism. The truss mechanism is equipped with a lateral sliding trolley. The telescopic conveying mechanism is hinged to the lateral sliding trolley via a first rotating arm and to the truss mechanism via a second rotating arm. The second rotating arm is connected to a first power mechanism, which drives the second rotating arm to rotate hinged to the truss mechanism. The truss mechanism supports and maintains the telescopic conveying mechanism at a certain height. Simply lifting the rod onto the platform of the telescopic conveying mechanism, combined with the swinging and telescopic movements of the mechanism, allows the rod to be transported from a lower position to the drilling platform. The structure is simple, easy to control, optimizes the catwalk structure, reduces the weight of the original box-type crossbeam, lowers the energy consumption for rod transport, achieves energy saving and consumption reduction, and increases rod transport efficiency.

Description

Technical Field

[0001] This invention relates to the field of oil and gas drilling and well workover technology, and in particular to an elevated catwalk. Background Technology

[0002] During drilling and workover operations in oil and gas fields, drill pipes, drill collars, casings, tubing, and other tools need to be transported to the worktable. The existing transport equipment is mainly the catwalk, which has evolved from the most primitive and common mechanical structure to the automated catwalks used today.

[0003] Existing automated catwalks mainly come in hydraulic and electric drive forms. Hydraulic drive uses hydraulic cylinders installed at a low position to lift the box-type crossbeam and transport the rods in the box-type crossbeam to the high drilling platform. Electric drive uses a motor, reducer, and other transmission mechanisms to drag the crossbeam up to the drilling platform using a ramp. Both forms require the use of box-type crossbeams, which are many times heavier than the rods, have a large volume, and are difficult to move. The transmission process from the low position to the high position consumes a lot of energy and has low efficiency, resulting in high operating costs for drilling and workover rigs. At the same time, with the increasing safety requirements for blowout prevention operations of drilling and workover rigs, the requirements for blowout preventer combinations have increased, and the drilling and workover rig platform has been raised accordingly, further increasing its size and energy consumption.

[0004] Therefore, there is an urgent need for a technical solution to address the problems of existing automated catwalks being large in size, difficult to relocate, and having high energy consumption. Summary of the Invention

[0005] The purpose of this invention is to provide an elevated catwalk to address the problems existing in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An elevated catwalk includes a truss mechanism and a telescopic conveyor mechanism. The truss mechanism is equipped with a lateral sliding trolley. The telescopic conveyor mechanism is hinged to the lateral sliding trolley via a first rotating arm and to the truss mechanism via a second rotating arm. The second rotating arm is connected to a first power mechanism, which drives the second rotating arm to rotate hinged to the truss mechanism.

[0008] This invention provides an elevated catwalk that uses a truss mechanism to support and maintain a telescopic conveyor mechanism at a certain height. Simply lifting the rod onto the platform of the telescopic conveyor mechanism, combined with the swinging and telescopic movements of the mechanism, transports the rod from a lower position to the drilling platform. This changes the original structure where hydraulic or electric drive force directly acts on the box-shaped beam holding the rod, achieving energy saving and consumption reduction. Furthermore, by incorporating the telescopic conveyor mechanism, the weight of the original box-shaped beam is reduced, further decreasing the energy consumption for rod transport. The optimized catwalk structure also results in higher rod transport efficiency.

[0009] As a preferred embodiment of the present invention, a support mechanism is provided at the bottom of the truss mechanism. The support mechanism includes a base and several struts. The top of each strut is detachably connected to the truss mechanism, and the bottom is detachably connected to the base. All the struts can form several parallelogram support areas and at least one triangular support area. The multi-strut support mechanism has a simple structure. The top end is detachably connected to the truss mechanism via a hinge structure, and the bottom end is detachably connected to the base via a hinge structure. This allows the support mechanism to be folded and retracted with the truss mechanism, realizing the miniaturization of the elevated catwalk during transportation. This is suitable for the frequent relocation of drilling and workover rigs in oil and gas fields, meeting transportation needs. Furthermore, during on-site installation, the truss mechanism can be hoisted into place and then fixed with struts, facilitating the on-site installation of the elevated catwalk.

[0010] As a preferred embodiment of the present invention, the elevated catwalk further includes a lifting mechanism and a transfer mechanism. The lifting mechanism is disposed around the perimeter of the truss structure, and the transfer mechanism is disposed on the top side of the truss structure. A lifting trolley is slidably mounted on the lifting mechanism, and the transfer mechanism is used to transfer the poles between the lifting trolley and the telescopic conveying mechanism. The lifting mechanism enables the horizontal lifting and lowering of the poles, while the transfer mechanism enables the transfer of the poles between the lifting trolley and the telescopic conveying mechanism. This achieves safe, rapid, and stable transfer of the poles between low and high positions, with a unique transfer path, ensuring the safety of the pole transfer process and improving transfer efficiency.

[0011] In a preferred embodiment of the present invention, the lifting mechanism includes a lifting arm, a transmission mechanism is provided on the lifting arm, and the lifting trolley is mounted on the transmission mechanism. The transmission mechanism is used to drive the lifting trolley to move vertically.

[0012] In a preferred embodiment of the present invention, the transmission mechanism includes a gear and rack mechanism and / or a sprocket and chain mechanism, and the transmission mechanism is connected to a brake. The brake is used to apply timely braking to the lifting trolley in case of an emergency, ensuring safe transport.

[0013] In a preferred embodiment of the present invention, there are at least two lifting mechanisms, which are arranged opposite each other on both sides of the conveying direction of the telescopic conveying mechanism. Each lifting mechanism is provided with at least one transfer mechanism. The two lifting mechanisms arranged opposite each other work independently, with one side controlled. When one side is working, the lifting trolley on the other side remains in a high position. This allows the elevated catwalk to adapt to the rapid and safe transport of poles in different placement environments.

[0014] In a preferred embodiment of the present invention, the transfer mechanism includes a first transfer arm and a second transfer arm. The first transfer arm is hinged to the truss mechanism, and the second transfer arm is hinged to the top side of the telescopic conveying mechanism. The first transfer arm and the second transfer arm are respectively connected to a second power mechanism. The second power mechanism is used to drive the first transfer arm to rotate hinged to the truss mechanism and to drive the second transfer arm to rotate hinged to the top side of the telescopic conveying mechanism.

[0015] As a preferred embodiment of the present invention, the telescopic conveying mechanism includes a base and a sliding arm that are connected by transmission. The base is hinged to the first rotating arm and the second rotating arm. The sliding arm is slidably disposed on the base. The second transfer arm is hinged to the sliding arm. The second transfer arm is provided with a slot for limiting the movement of the rod.

[0016] In a preferred embodiment of the present invention, the sliding arm comprises at least two segments, with adjacent sliding arms connected by a transmission mechanism. This forms a multi-stage telescopic transmission structure, enabling the rod to be transmitted along its own length.

[0017] As a preferred embodiment of the present invention, the first power mechanism and the second power mechanism include telescopic cylinders.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. The truss mechanism can support and maintain the telescopic conveyor mechanism at a certain height. It is only necessary to lift the rod onto the platform of the telescopic conveyor mechanism. With the swinging and telescopic movements of the telescopic conveyor mechanism, the rod can be transported from a low position to the drilling platform.

[0020] 2. The original structure of the box-shaped crossbeam that directly applies hydraulic or electric drive force to the rods has been changed, achieving the purpose of energy saving and consumption reduction, and making the rod transmission cost lower;

[0021] 3. By setting up a telescopic conveying mechanism, the weight of the original box-type crossbeam is reduced, further reducing the energy consumption of pole conveying;

[0022] 4. The catwalk structure has been optimized, resulting in higher pole transmission efficiency;

[0023] The beneficial effects of other embodiments of the present invention are:

[0024] 1. The multi-strut support structure is simple and allows the support structure to be folded and collapsed with the truss structure, realizing the miniaturization of the elevated catwalk during transportation. It is suitable for the frequent relocation of drilling and workover rigs in oil and gas fields, meets transportation needs, and during on-site installation, the truss structure can be hoisted into place and then fixed with struts, which facilitates the on-site installation of the elevated catwalk.

[0025] 2. The lifting mechanism achieves horizontal lifting of the pole, and the transfer mechanism transfers the pole from the lifting trolley to the telescopic conveying mechanism, realizing safe, fast and stable transmission of the pole from low position to high position. The transmission path is unique, ensuring the safety of the pole transmission process and improving transmission efficiency. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an elevated catwalk in operation according to Embodiment 1;

[0027] Figure 2 This is a structural schematic diagram of an elevated catwalk transportation configuration in Example 1;

[0028] Figure 3 This is a schematic diagram of the telescopic conveying mechanism described in Embodiment 1;

[0029] Figure 4 This is a structural schematic diagram of an elevated catwalk in operation according to Embodiment 2;

[0030] Figure 5 This is a schematic diagram of the lifting mechanism described in Embodiment 3;

[0031] Figure 6 This is a structural schematic diagram of an elevated catwalk in operation according to Embodiment 3;

[0032] Figure 7 This is a side view of an elevated catwalk according to Embodiment 4;

[0033] Figure 8 yes Figure 7 A magnified structural diagram of part A in the middle;

[0034] Figure 9 This is a structural schematic diagram of an elevated catwalk in operation according to the present invention.

[0035] icon:

[0036] 1- Truss mechanism, 2- Telescopic conveyor mechanism, 21- Base, 22- Sliding arm, 23- Slot, 3- Lateral trolley, 4- First rotating arm, 5- Second rotating arm, 6- First power mechanism, 7- Support mechanism, 71- Base, 72- Support rod, 8- Lifting mechanism, 81- Lifting trolley, 82- Lifting arm, 83- Transmission mechanism, 84- Transmission rod, 9- Transfer mechanism, 91- First transfer arm, 92- Second transfer arm, 93- Second power mechanism, 10- Rod, 20- Drilling platform. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings.

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0039] Example 1

[0040] like Figures 1-4 As shown, an elevated catwalk according to this embodiment includes a truss mechanism 1 and a telescopic conveying mechanism 2. The truss mechanism 1 is provided with a transverse trolley 3. The telescopic conveying mechanism 2 is hinged to the transverse trolley 3 via a first rotating arm 4 and to the truss mechanism 1 via a second rotating arm 5. The second rotating arm 5 is connected to a first power mechanism 6, which drives the second rotating arm 5 to rotate hingedly to the truss mechanism 1. The telescopic conveying mechanism 2 includes a base 21 and a sliding arm 22 that are connected by transmission. The base 21 is hinged to the first rotating arm 4 and the second rotating arm 5, and the sliding arm 22 is slidably disposed on the base 21.

[0041] In this embodiment, an elevated catwalk is provided. The truss mechanism 1 is a steel frame structure in the shape of a cuboid. The transverse trolley 3 is set on a transversely arranged track inside the truss mechanism 1, so that the transverse trolley 3 can move laterally along the track. The base 21 and the sliding arm 22 of the telescopic conveying mechanism 2 are both long strip structures adapted to the length of the rod 10 to be conveyed. The tail end of the base 21 is hinged to the transverse trolley 3 through the first rotating arm 4. The bottom surface of the middle part of the base 21 is hinged to the truss mechanism 1 through the second rotating arm 5. The second rotating arm 5 is connected to the first power mechanism 6. The first power mechanism 6 drives the second rotating arm 5 to rotate relative to the truss mechanism 1 along the hinge point, thereby changing the angle between the telescopic conveying mechanism 2 and the truss mechanism 1.

[0042] Specifically, in this embodiment, the first power mechanism 6 is preferably a telescopic hydraulic cylinder, hinged to the lower middle part of the second rotating arm 5, such as... Figure 4 From the perspective shown, when the telescopic hydraulic cylinder extends, the second rotating arm 5 rotates clockwise, realizing the overall swing of the telescopic transmission mechanism 2. The entire telescopic transmission mechanism 2 is swinged from a horizontal state to an inclined state. When the second rotating arm 5 rotates to a vertical position and continues to rotate, the first rotating arm 4 is driven by the force of the telescopic transmission mechanism 2 to rotate clockwise, supporting the tail end of the telescopic transmission mechanism 2 to lift up, so that the inclination of the telescopic transmission mechanism 2 gradually decreases and remains in a high position lifted by the first rotating arm 4 and the second rotating arm 5. This allows the height and inclination angle of the telescopic transmission mechanism 2 to be adjusted by only adjusting the length of the telescopic hydraulic cylinder, so that the telescopic transmission mechanism 2 is adapted to the height of the drilling platform. Through the transmission connection between the sliding arm 22 and the base 21, the rod 10 is transmitted between the telescopic transmission mechanism 2 and the drilling platform.

[0043] Specifically, the first power mechanism 6 can also be a telescopic electric cylinder.

[0044] Specifically, each hinge point is designed with a combination of a perforated lug plate and a pin, which allows for the removal and installation of the pins to facilitate the assembly and disassembly of the elevated catwalk.

[0045] Preferably, the telescopic conveying mechanism 2 in this embodiment is a multi-stage telescopic conveying structure, including a base 21 and at least two stages of sliding arms 22. The top surface of the uppermost sliding arm 22 is provided with a V-shaped groove to restrict the movement and rolling of the rod 10, and a limiting block is provided to restrict the longitudinal movement of the rod along the V-shaped groove. Adjacent sliding arms 22 are connected by a gear and rack mechanism and / or a chain mechanism to realize the transmission of the rod 10 along its own longitudinal direction.

[0046] Specifically, taking the base 21 and the two-stage sliding arms 22 as an example, a ring chain is arranged longitudinally on the base 21 and is driven to rotate by a sprocket connected to a power source. The first-stage sliding arm close to the base 21 is connected to the ring chain by toothed engagement, and the first-stage sliding arm is slidably connected to the base 21 by a guide rail with rollers. The second-stage sliding arm is set on the first-stage sliding arm and is engaged with a gear or sprocket that runs through and rolls on the first-stage sliding arm to achieve relative movement between the second-stage sliding arm and the first-stage sliding arm. The number of sliding arms 22 can be adjusted according to the actual situation to change the length of the multi-stage telescopic transmission structure 2, so that the elevated catwalk can adapt to the transmission of poles 10 of different lengths.

[0047] This embodiment of an elevated catwalk utilizes a telescopic conveying mechanism 2 whose telescopic conveying principle is similar to that of multi-stage telescopic forks in warehousing and logistics. Through the relative movement between sliding arms 22 and between sliding arms 22 and the base 21, the lever 10 is moved longitudinally, allowing it to move back and forth between the telescopic conveying mechanism 2 and the drilling platform. The truss mechanism 1 supports and maintains the telescopic conveying mechanism 2 at a certain height. Simply lifting the lever 10 onto the platform of the telescopic conveying mechanism 2, combined with the swinging and telescopic movements of the mechanism, transports the lever 10 from a lower position to the drilling platform. This changes the original structure where hydraulic or electric drive force directly acts on the box-shaped beam holding the lever 10. The structure is simple, control is convenient, and the weight of the box-shaped beam during the traditional lever 10 conveying process is reduced. The catwalk structure is optimized, resulting in higher lever 10 conveying efficiency and achieving energy saving and consumption reduction.

[0048] Example 2

[0049] like Figures 1-4As shown, an elevated catwalk in this embodiment has the same structure as in embodiment 1, except that: a support mechanism 7 is provided at the bottom of the truss mechanism 1. The support mechanism 7 includes a base 71 and several struts 72. The top of the struts 72 is detachably connected to the truss mechanism 1, and the bottom is detachably connected to the base 71. All the struts 72 can form several parallelogram support areas and at least one triangular support area.

[0050] In this embodiment, an elevated catwalk features multiple struts 72 at the bottom of a truss mechanism 1. Each strut 72 has a double-ear plate structure at both ends, which are hinged to the base 71 and the fixed ear plate on the upper truss mechanism 1 via pins. Figures 1-2 As shown, during transport via the elevated catwalk, the struts 72 form a parallelogram support area, which allows the truss mechanism 1 to be folded close to the base 71, meeting the transport size requirements. Figures 1-4 As shown, when the elevated catwalk is in use, the truss mechanism is hoisted into place by a crane. After hoisting, the hinge position between the struts and the truss mechanism is adjusted, and the obliquely installed struts 72 are installed so that at least one triangular support area is formed between the struts 72. The truss mechanism 1 is supported in a high position in the working state by the struts 72, and the truss mechanism 1 and the telescopic conveyor mechanism 2 are stably set in a high position, which facilitates the transportation and on-site installation of the elevated catwalk.

[0051] Example 3

[0052] like Figures 6-9 As shown, an elevated catwalk in this embodiment has the same structure as in embodiment 1, except that the elevated catwalk further includes a lifting mechanism 8 and a transfer mechanism 9. The lifting mechanism 8 is located on the left or right side of the truss mechanism 1 along the length of the pole 10, and the transfer mechanism 9 is located on the top side of the truss mechanism 1. A lifting trolley 81 is slidably mounted on the lifting mechanism 8, and the transfer mechanism 9 is used to transfer the pole 10 from the lifting trolley 81 to the telescopic conveying mechanism 2.

[0053] Specifically, the lifting mechanism 8 in this embodiment preferably includes two lifting arms 82 arranged in an arrangement. Each lifting arm 82 includes two parallel vertical guide rails. An upper sprocket and a lower sprocket are respectively arranged between the two vertical guide rails of each lifting arm 82, and a ring chain is tensioned. The upper sprocket and the lower sprocket are respectively fixed on corresponding bearing seats and fixed to the corresponding vertical guide rails through the bearing seats. The input end of the upper sprocket is connected to the transmission rod 84 through a coupling. The transmission rod 84 is connected to the output shaft of the motor reducer through a coupling. The lifting trolley 81 on each lifting arm 82 has two sides. It is slidably connected to the vertical guide rail and detachably connected to the chain in the middle. The lifting trolley 81 is provided with a groove that can lift and hold the rod 10. The motor reducer drives the sprocket to rotate, so as to realize the synchronous lifting and lowering of the lifting trolley 81 on the two lifting arms 82. This enables the stable lifting or lowering of rods 10 such as drill pipe, casing, tubing, and drill collar, so that the rod 10 is transferred to the operating range of the transfer mechanism 9. The rod 10 can be transferred from the lifting trolley 81 to the telescopic transfer mechanism 2, or from the telescopic transfer mechanism 2 to the lifting trolley 81 through the transfer mechanism 9.

[0054] Preferably, the number of lifting arms 82 can be adjusted according to the actual situation. It can be set to one or multiple. When set to one, the length of the groove on the lifting trolley 81 is increased by adjusting the distance between the two vertical guide rails, so as to achieve stable lifting of the pole 10. When set to multiple, the transmission mechanism 83 on all longitudinally adjacent lifting arms is connected by the transmission rod 84. Each lifting arm 82 is provided with a lifting trolley 81 to achieve multi-point stable lifting of poles of different lengths.

[0055] Preferably, the sprocket and chain mechanism between the two vertical guide rails of each lifting arm 82 can also be adjusted to a gear and rack mechanism, belt drive mechanism or other transmission mechanism according to the actual situation, which can be driven by a motor reducer, fuel engine or the like.

[0056] Preferably, in this embodiment, the motor reducer of the lifting mechanism 8 is connected to a brake to enable timely braking of the lifting trolley 81 in case of an emergency during movement. The motor control is designed with a self-locking function, which can stop the lifting trolley 81 at any position on the lifting arm 82 to improve the safety of the pole 10 transmission process.

[0057] Specifically, the transfer mechanism 9 in this embodiment preferably includes a first transfer arm 91 and a second transfer arm 92. Both the first transfer arm 91 and the second transfer arm 92 are arranged perpendicular to the longitudinal direction of the rod 10. The bottom of the first transfer arm 91 is hinged to the truss mechanism 1 through two telescopic cylinders. The two telescopic cylinders are arranged and connected to the bottom of the longitudinal direction of the first transfer arm 91. By adjusting the extension or shortening of the two telescopic cylinders, the tilt direction and tilt angle of the first transfer arm 91 relative to the truss mechanism 1 can be adaptively changed. The second transfer arm 92 is offset from the first transfer arm 91. One end of the second transfer arm 92 is hinged to the uppermost sliding arm 22 of the telescopic transmission mechanism 2, and the other end is a free end. The second transfer arm 92 achieves automatic hinged rotation with the telescopic transmission mechanism 2 through the connection of the telescopic cylinders. A V-shaped groove is provided on the top surface of the second transfer arm 92. When the second transfer arm 92 is attached to the top surface of the telescopic transmission mechanism 2, a V-shaped groove for limiting the rolling of the rod 10 can be formed on the telescopic transmission mechanism 2.

[0058] In this embodiment, an elevated catwalk uses a lifting mechanism 8 to horizontally lift and lower poles 10, and a transfer mechanism 9 to transfer poles 10 between the lifting mechanism 8 and the telescopic transfer mechanism 2. This enables safe, fast, and stable transfer of poles 10 from low to high or from high to low. The transfer path is unique, ensuring the safety of the pole transfer process and improving transfer efficiency.

[0059] Example 4

[0060] like Figures 1-9 As shown, this embodiment of an elevated catwalk has the same structure as embodiment 3, except that: there are two lifting mechanisms 8, which are arranged opposite each other on the left and right sides of the telescopic conveying mechanism 2 in the conveying direction, and each lifting mechanism 8 is respectively provided with the transfer mechanism 9.

[0061] This embodiment of an elevated catwalk, based on embodiment 1, adopts a truss mechanism 1 at the top. The bottom of the truss mechanism 1 is connected to the base 71 by a support rod 72. The pole 10 is horizontally lifted by the lifting mechanism 8 to the rotation range of the transfer mechanism 9, and then transferred to the sliding arm 22 at the top of the telescopic conveying mechanism 2 by the transfer mechanism 9. Through the extension and retraction of the telescopic conveying mechanism 2, it is transported along the longitudinal direction of the pole 10. At the same time, lifting mechanisms 8 are respectively set on the left and right sides of the conveying direction, so that the two lifting mechanisms 8 work together. One lifting mechanism 8 is used to lift the pole 10 from the ground to the top surface of the truss mechanism 1, and the other lifting mechanism 8 is used to lower the pole 10 from the top surface of the truss mechanism 1 to the ground, realizing bidirectional transport of the pole 10 from the ground to the drilling platform. The two lifting mechanisms 8 work independently and are controlled on one side. When one side is working, the lifting trolley 81 on the other side stays at a high position to avoid safety hazards caused by misoperation and ensure safety.

[0062] Preferably, the two oppositely arranged lifting mechanisms 8 are equipped with motors, reducers and brakes respectively, and the motor control is designed with a self-locking function to realize the independent and safe operation of the two oppositely arranged lifting mechanisms 8.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A catwalk, characterized in that, The catwalk comprises a truss mechanism (1) and a telescopic conveying mechanism (2), the truss mechanism (1) is provided with a transverse sliding trolley (3), the telescopic conveying mechanism (2) is hinged with the transverse sliding trolley (3) through a first rotating arm (4), is hinged with the truss mechanism (1) through a second rotating arm (5), the second rotating arm (5) is connected with a first power mechanism (6), and the first power mechanism (6) is used to drive the second rotating arm (5) to rotate and be hinged with the truss mechanism (1). The catwalk further comprises a lifting mechanism (8) arranged on the four sides of the truss mechanism (1), a lifting trolley (81) is slidably arranged on the lifting mechanism (8), the lifting mechanism (8) comprises at least one lifting arm (82), a transmission mechanism (83) is arranged on the lifting arm (82), and the lifting trolley (81) is arranged on the transmission mechanism (83); when the lifting arm (82) is more than two, the transmission mechanisms (83) adjacent in the longitudinal direction are drivingly connected through a transmission rod (84). The catwalk further comprises a transfer mechanism (9) arranged on the top side of the truss mechanism (1), the transfer mechanism (9) is used for transferring a rod tool (10) between the lifting trolley (81) and the telescopic conveying mechanism (2), the transfer mechanism (9) comprises a first transfer arm (91) and a second transfer arm (92), the first transfer arm (91) is hinged with the truss mechanism (1), the second transfer arm (92) is hinged with the top side of the telescopic conveying mechanism (2), the first transfer arm (91) and the second transfer arm (92) are respectively connected with a second power mechanism (93), the telescopic conveying mechanism (2) comprises a base (21) and a sliding arm (22) drivingly connected, the base (21) is hingedly connected with the first rotating arm and the second rotating arm (5), the sliding arm (22) is slidably arranged on the base (21), the second transfer arm (92) is hingedly connected on the sliding arm (22), and a clamping groove for limiting the movement of the rod tool (10) is arranged on the second transfer arm (92).

2. A catwalk as claimed in claim 1, characterised in that, The bottom of the truss mechanism (1) is provided with a supporting mechanism (7), the supporting mechanism (7) comprises a base (71) and a plurality of supporting rods (72), the top of the supporting rod (72) is detachably connected with the truss mechanism (1), the bottom of the supporting rod (72) is detachably connected with the base (71), and all the supporting rods (72) can form a plurality of parallelogram support areas and at least one triangular support area.

3. A catwalk as claimed in claim 1, wherein, The transmission mechanism (83) comprises a gear and rack mechanism and / or a chain wheel and chain mechanism, and the transmission mechanism (83) is connected with a brake.

4. A catwalk as claimed in claim 1, wherein, The lifting mechanism (8) is at least two, the two lifting mechanisms (8) are oppositely arranged on both sides of the conveying direction of the telescopic conveying mechanism (2), and at least one transfer mechanism (9) is correspondingly arranged on each lifting mechanism (8); The two oppositely arranged lifting mechanisms (8) independently work, and one side is controlled, and when one side works, the lifting trolley (81) on the other side stays at a high position.

5. A catwalk as claimed in claim 1, wherein, The slide arm (22) is at least two sections, and the adjacent slide arms (22) are transmissionally connected.

6. A catwalk as claimed in claim 1, wherein, The first power mechanism (6) and the second power mechanism (93) comprise telescopic cylinders.

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