Quickly assembled and disassembled lifting derrick and its installation method

Abstract

The application provides a quick-mounting and quick-dismounting lifting derrick, which comprises a derrick bottom section, a derrick lower section, a derrick middle section and a derrick upper section which are sequentially connected by pinning from bottom to top, a lifting oil cylinder which is vertically telescopic is arranged below the derrick bottom section, a balance beam for connecting the bottom end of the derrick lower section, the derrick middle section or the derrick upper section is arranged at the top end of the piston rod of the lifting oil cylinder, bottom guide rails for guiding the derrick lower section and the derrick middle section are vertically arranged on the top of the derrick bottom section, and connecting shafts which can be connected with hooks of the bottom end of the derrick upper section and the derrick middle section respectively and realize horizontal rotation of the derrick middle section and the derrick lower section are arranged on one side of the top end of the derrick middle section and the derrick lower section. The application has the effects of improving the mounting efficiency of the derrick, reducing the required floor area for mounting the derrick, eliminating the risk of falling objects from high altitude and avoiding abrasion between the sections of the derrick.

Description

Technical Field

[0001] This invention relates to the field of vertical assembly derrick technology, and more particularly to a quick-assembly and disassembly derrick and its installation method. Background Technology

[0002] As a key component for the integrated design, modular transportation, and rapid assembly and disassembly of derrick structures, the derrick lifting device is of great significance for reducing the number of derrick transportation modules and improving the efficiency of integrated transportation and disassembly / installation.

[0003] In the field of oil and gas drilling, vertical lifting derricks, compared to rotary K-type derricks, have a smaller lifting footprint, more compact structure, and lower transportation size and cost. They are particularly suitable for space-constrained mountainous environments, hilly areas with complex terrain, and densely populated areas with high land use costs. The hydraulic winch hoisting device mainly consists of a hydraulic winch, derrick mounting frame, guide pulleys, moving pulley blocks, fixed pulley blocks, lifting wire ropes, and limiting devices integrated on the bottom section of the derrick. The bottom section of the derrick is initially hoisted. Then, the hydraulic winch (main winch drum) provides power, the guide pulleys change the direction of the wire rope, and the pulley blocks reduce the lifting tension on other sections, ultimately achieving the installation of the derrick.

[0004] The main problems with the existing technology are: 1. The workload of threading the wire rope and rewinding the lifting rope on both sides of the moving pulley in the hoisting system is large; 2. The pulleys, wire rope system and hydraulic winch of the hoisting system occupy the space of the derrick cage ladder, which poses a risk of falling objects from height; 3. The operation of the hydraulic winches on both sides of the derrick is not easy to synchronize, and there is a problem of uneven wear and jamming between derrick sections. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a quick-install and dismantle lifting derrick and its installation method, which solves the problems of large workload, large footprint, risk of falling objects from height, and wear between different sections of the derrick in existing technologies.

[0006] According to an embodiment of the present invention, a quick-assembly and disassembly lifting derrick includes a bottom section, a lower section, a middle section, and an upper section of the derrick connected sequentially from bottom to top by pins. A lifting cylinder that extends and retracts in the vertical direction is provided below the bottom section of the derrick. The top end of the piston rod of the lifting cylinder is provided with a balance beam for connecting the bottom end of the lower section, the middle section, or the upper section of the derrick. A bottom guide rail for guiding the lower section and the middle section of the derrick is vertically provided at the top of the bottom section of the derrick. A connecting shaft is arranged on one side of the top end of the middle section and the lower section of the derrick, which can be connected to the hooks at the bottom end of the upper section and the middle section of the derrick respectively, and realizes the horizontal rotation of the middle section and the lower section of the derrick.

[0007] Preferably, the bottom guide rail includes an L-shaped guide plate and rollers arranged on the inner side of the bottom section of the derrick, wherein a protrusion for engaging the inner side of the guide plate is provided on one side of the upper section of the derrick, and grooves for the rollers to enter are provided on both sides of the lower section and the middle section of the derrick.

[0008] Preferably, the top of the bottom section of the derrick is provided with an automatic locking pin assembly that can be connected to the bottom end of the upper section, middle section, or lower section of the derrick respectively. The automatic locking pin assembly includes a hydraulic cylinder, a right-angle plate, and a pin that is horizontally slidably disposed on the thigh of the bottom section of the derrick. The hydraulic cylinder is hinged to the bottom section of the derrick. The movable end of the piston rod of the hydraulic cylinder is hinged to one end of the right-angle plate. The middle part of the right-angle plate is hinged to the bottom section of the derrick. The other end of the right-angle plate is connected to a strip hole at one end of the pin through a hinge. The strip hole is arranged vertically. The other end of the pin is located on the inner side of the bottom section of the derrick.

[0009] Preferably, a working platform is provided in the middle of the bottom section of the derrick, and the automatic locking pin assembly is located above the working platform.

[0010] Preferably, the lifting cylinder is arranged on the drilling platform below the derrick, and the balance beam is provided with pins that can be connected to the pin holes of the bottom crossbeams of the lower section, middle section and upper section of the derrick respectively.

[0011] Preferably, the bottom section of the derrick is an A-frame, and the bottom of the bottom section includes a fixed end and a movable end hinged to one side of the fixed end. The movable end is arranged at an angle, and the movable end and the fixed end are connected by a horizontal tie rod.

[0012] A method for quickly dismantling and installing a lifting derrick includes the following steps: Step 1: Hoist the lifting cylinder and install it into the center hole of the drill table turntable. Install the bottom section of the derrick and hoist the bottom section of the derrick onto the drill table. Connect the bottom section of the derrick to the drill table. Then hoist the upper section of the derrick and guide it into the bottom section of the derrick. Step 2: Extend the lifting cylinder and connect the balance beam at the top of the lifting cylinder to the crossbeam at the bottom of the upper section of the derrick via the positioning pin. Step 3: Control the lifting cylinder to continue extending until the locking pin hole on the rear thigh of the upper section of the derrick is aligned with the locking pin in the automatic locking pin assembly of the bottom section of the derrick. Then, control the automatic locking pin assembly to insert the pin, thus connecting the upper section and the bottom section of the derrick. Step 4: Control the lifting cylinder to retract, so that the balance beam falls back to the drilling platform. Horizontally hoist the middle section of the derrick, so that the connecting shaft on the top side of the middle section of the derrick is hooked in the hook of the upper section of the derrick. Remove the crane hook, and the middle section of the derrick will slowly sag under the action of gravity until it is in a free vertical state. Step 5: Connect the telescopic cat head to the bottom of the middle section of the derrick. Use the horizontal traction force of the telescopic cat head to straighten the middle section of the derrick. Connect the middle section of the derrick and the upper section of the derrick through the locking pin hole at the end. Control the extension of the lifting cylinder so that the balance beam is connected to the bottom crossbeam of the middle section of the derrick through the positioning pin. Step Six: Release the automatic locking pin assembly between the upper section and the bottom section of the derrick. The lifting cylinder continues to extend until the locking pin hole of the middle section of the derrick is aligned with the locking pin in the automatic locking pin assembly of the bottom section of the derrick. Control the automatic locking pin assembly to connect the bottom end of the middle section of the derrick to the top end of the bottom section of the derrick. After the middle section and the bottom section of the derrick are fixed, hoist the second platform and hook it to the middle section of the derrick. Then connect the locking pin at the lower end of the second platform to complete the fixing of the second platform. Step 7: Operate the lifting cylinder to retract, so that the balance beam falls back to the drilling platform. Horizontally hoist the lower section of the derrick, hang the connecting shaft at the top of the lower section of the derrick on the hook at the bottom of the middle section of the derrick, remove the crane hook, and let the lower section of the derrick slowly sag under the action of gravity until it is in a free vertical state. Step 8: Connect the telescopic cat head to the bottom of the lower section of the derrick. Use the horizontal traction force of the telescopic cat head to straighten the lower section of the derrick. Connect the middle section of the derrick and the lower section of the derrick through the locking pin hole at the end. Control the extension of the lifting cylinder. Connect the balance beam to the bottom crossbeam of the lower section of the derrick through the positioning pin. Step 9: Contact the automatic locking pin assembly between the middle section and the bottom section of the derrick. The lifting cylinder continues to extend until the locking pin hole of the lower section of the derrick is aligned with the locking pin in the automatic locking pin assembly of the bottom section of the derrick. Control the automatic locking pin assembly to connect the bottom section of the lower section of the derrick to the top of the bottom section of the derrick. After the lower section of the derrick and the bottom section of the derrick are fixed, the installation of the main body of the derrick is completed.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Simple power source: The derrick can be lifted by starting the hydraulic station with an emergency power supply, without the need to install a traveling crane system and a winch power system. It can be installed at the front and rear sites simultaneously, improving the efficiency of drilling rig installation.

[0014] 2. Safe and quick derrick lifting: The two-way hydraulic cylinder, in conjunction with the pin shaft and guide rail limit, enables the derrick to be lifted and lowered quickly and vertically, avoiding repeated disassembly and assembly of the lifting rope at high positions.

[0015] 3. Compact structure: The lifting device is a self-contained system. After installation, it can be disassembled and removed without occupying space on the drilling platform and derrick.

[0016] 4. Good hoisting synchronization: The mechanical synchronization of the two sides of the derrick is achieved through rollers, guide plates and balance beams, reducing uneven wear during the hoisting process. Attached Figure Description

[0017] Figure 1 This is a front view of an embodiment of the present invention.

[0018] Figure 2 This is a side view of an embodiment of the present invention.

[0019] Figure 3 This is a front view of the structure of the bottom section of the derrick in an embodiment of the present invention.

[0020] Figure 4 This is a structural side view of the bottom section of the derrick in an embodiment of the present invention.

[0021] Figure 5 This is a front view of the upper section of the derrick in an embodiment of the present invention.

[0022] Figure 6 This is a side view of the upper section of the derrick in an embodiment of the present invention.

[0023] Figure 7 This is a top view of the upper section of the derrick in an embodiment of the present invention.

[0024] Figure 8 This is a front view of the structure of the middle section of the derrick in an embodiment of the present invention.

[0025] Figure 9 This is a side view of the structure of the middle section of the derrick in an embodiment of the present invention.

[0026] Figure 10 This is a front view of the lower section of the derrick in an embodiment of the present invention.

[0027] Figure 11 This is a side view of the structure of the lower section of the derrick in an embodiment of the present invention.

[0028] Figure 12 This is a top view of the structure of the bottom guide rail and the upper section of the derrick in an embodiment of the present invention.

[0029] Figure 13 This is a top view of the structure of the bottom guide rail and the lower section of the derrick in an embodiment of the present invention.

[0030] Figure 14 This is a front view of the structure of the bottom section of the derrick in the pin-pulling state in an embodiment of the present invention.

[0031] Figure 15 This is a front view of the structure of the bottom section of the derrick in the pinned state in an embodiment of the present invention.

[0032] Figure 16 This is a schematic diagram of the structure for hoisting the upper section of the derrick in an embodiment of the present invention.

[0033] Figure 17 This is a schematic diagram of the structure installed on the upper section of the derrick in an embodiment of the present invention.

[0034] Figure 18 This is a schematic diagram of the structure for fixing the upper section of the derrick in an embodiment of the present invention.

[0035] Figure 19 This is a schematic diagram of the derrick mid-section spin-on structure in an embodiment of the present invention.

[0036] Figure 20 This is a schematic diagram of the structure connecting the middle section of the derrick in an embodiment of the present invention.

[0037] Figure 21 This is a schematic diagram of the structure for fixing the middle section of the derrick in an embodiment of the present invention.

[0038] Figure 22 This is a schematic diagram of the screw-on structure of the lower section of the derrick in an embodiment of the present invention.

[0039] Figure 23 This is a schematic diagram of the structure connecting the lower section of the derrick in an embodiment of the present invention.

[0040] Figure 24 This is a schematic diagram of the structure for fixing the lower section of the derrick in an embodiment of the present invention.

[0041] Figure 25 This is a lifting device for vertically mounted derricks in the existing technology.

[0042] In the above attached diagram: 1. Bottom section of derrick; 2. Lower section of derrick; 3. Middle section of derrick; 4. Upper section of derrick; 5. Lifting cylinder; 6. Balance beam; 7. Bottom guide rail; 8. Second-level platform; 9. Automatic locking pin assembly; 10. Guide plate; 11. Roller; 12. Protrusion. Detailed Implementation

[0043] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] like Figure 1-18 As shown, to address the issues of low workload, low safety, and damage to the derrick caused by winch wire rope hoisting, this invention proposes a quick-assembly and disassembly hoisting derrick, comprising a bottom section 1, a lower section 2, a middle section 3, and an upper section 4 connected sequentially from bottom to top by pins. A vertically retractable hoisting cylinder 5 is installed below the bottom section 1. A balance beam 6 is installed at the top of the piston rod of the hoisting cylinder 5 to connect the bottom ends of the lower section 2, the middle section 3, or the upper section 4. A bottom guide rail 7 is vertically installed at the top of the bottom section 1 to guide the lower section 2 and the middle section 3. Connecting shafts are arranged on one side of the top of the middle section 3 and the lower section 2, respectively, to connect with hooks at the bottom ends of the upper section 4 and the middle section 3, enabling horizontal rotation of the middle section 3 and the lower section 2.

[0045] The derrick is divided into sections. Lifting cylinders 5, mounted below the bottom section, lift each section sequentially. The length of the bottom section 1 is greater than that of the lower section 2, the middle section 3, and the upper section 4. The lower section 2 and the middle section 3 are of equal length. Lifting cylinders 5, via a balance beam 6, lift the upper section 4 to the top of the bottom section 1, and then fix the upper section 4 to the bottom section 1. Hooks are installed at the bottom of the upper section 4. When hoisting the middle section 3, a connecting shaft protruding from the top of the ladder allows the middle section 3 to rotate around its connecting shaft, moving it into the bottom section 1. A pin then connects the middle section 3 and the upper section 4. The lower section 2 and the bottom section 1 are subsequently fixed in sequence.

[0046] like Figure 12-13 As shown, the bottom guide rail 7 guides the movement of the upper section 4, middle section 3, and lower section 2 of the derrick. The bottom guide rail 7 includes an L-shaped guide plate 10 and rollers 11 arranged inside the lower section 1. The upper section 4 has a protrusion 12 on its back side for engaging with the inner side of the guide plate 10. The lower section 2 and middle section 3 both have grooves on their sides for the rollers 11 to enter. The upper section 4 is guided by the protrusion 12 engaging with the guide plate 10; the middle section 3 and lower section 2 are guided by the grooves on their sides engaging with the rollers 11.

[0047] like Figure 14 and Figure 15 As shown, when the upper section 4 or the middle section 3 of the derrick is lifted to the top of the lower section 1 of the derrick, an automatic locking pin assembly 9 is provided at the top of the lower section 1 of the derrick to fix the upper section 4 or the middle section 3 of the derrick. The lower section 1 of the derrick is respectively connected to the bottom end of the upper section 4, the middle section 3, or the lower section 2 of the derrick. The automatic locking pin assembly 9 includes a hydraulic cylinder, a right-angle plate, and a pin that is horizontally slidably disposed on the thigh of the lower section 1 of the derrick. The movement of the hydraulic cylinder is hinged to the lower section 1 of the derrick. The movable end of the piston rod of the hydraulic cylinder is hinged to one end of the right-angle plate. The middle part of the right-angle plate is hinged to the lower section 1 of the derrick. The other end of the right-angle plate is connected to a strip hole at one end of the pin through a hinge. The strip hole is arranged vertically. The other end of the pin is located on the inner side of the lower section 1 of the derrick. When the upper section 4 of the derrick is lifted to the top of the lower section 1 of the derrick, the hydraulic cylinder in the automatic locking pin assembly 9 pushes the right-angle plate to rotate around the hinge point in the middle. The right-angle plate pushes the locking pin to move into the interior of the lower section 1 of the derrick, and the pin is inserted to achieve a fixed connection between the lower section 1 of the derrick and the upper section 4 of the derrick. The subsequent fixed installation of the middle section 3 and the lower section 2 of the derrick is carried out in the same manner.

[0048] like Figure 21-24As shown, to facilitate the confirmation of the fixed connections between the various sections of the derrick by the staff, a working platform is provided in the middle of the bottom section 1 of the derrick, and the automatic locking pin assembly 9 is located above the working platform. The working platform is convenient for the staff to stand on. like Figure 1 and Figure 2 As shown, the lifting cylinder 5 is used to stably lift the upper section 4, middle section 3, and lower section 2 of the derrick. The lifting cylinder 5 is arranged on the drilling platform below the derrick, and the balance beam 6 is equipped with pins that can be connected to the pin holes of the bottom crossbeams of the lower section 2, middle section 3, and upper section 4 of the derrick.

[0049] like Figure 4 As shown, the derrick bottom section 1 is designed for easy installation and transport. The derrick bottom section 1 is an A-frame structure, with a fixed end at the bottom and a movable end hinged to one side of the fixed end at the top. The movable end is arranged at an angle, and the movable end is connected to the fixed end by a horizontal tie rod.

[0050] like Figure 16-24 As shown, the present invention provides a method for the rapid dismantling and installation of a lifting derrick, comprising the following steps: Step 1: As Figure 16 As shown, the lifting cylinder 5 is hoisted and installed into the middle hole of the drill table turntable. The bottom section 1 of the derrick is installed and then the bottom section 1 of the derrick is hoisted onto the drill table. The bottom section 1 of the derrick is installed and connected to the drill table. Then the upper section 4 of the derrick is hoisted and introduced into the bottom section 1 of the derrick. Step Two: As Figure 17 As shown, the lifting cylinder 5 extends and is connected to the balance beam 6 at the top of the lifting cylinder 5 and the crossbeam at the bottom of the upper section 4 of the derrick via a positioning pin. Step 3: As Figure 18 As shown, control the lifting cylinder 5 to continue extending until the locking pin hole on the rear thigh of the upper section 4 of the derrick is aligned with the locking pin in the automatic locking pin assembly 9 of the bottom section 1 of the derrick. Then control the automatic locking pin assembly 9 to insert the pin, thereby connecting the upper section 4 of the derrick and the bottom section 1 of the derrick. Step Four: As Figure 19 As shown, control the retraction of the lifting cylinder 5 to lower the balance beam 6 back to the drilling platform, horizontally hoist the middle section 3 of the derrick, and hang the connecting shaft on one side of the top of the middle section 3 of the derrick in the hook of the upper section 4 of the derrick. Remove the crane hook, and the middle section 3 of the derrick will slowly sag under the action of gravity until it is in a free vertical state. Step 5: As Figure 20 As shown, a telescopic cat head is connected to the bottom of the middle section 3 of the derrick. The horizontal traction force of the telescopic cat head is used to straighten the middle section 3 of the derrick. The middle section 3 of the derrick and the upper section 4 of the derrick are connected through the locking pin hole at the end. The lifting cylinder 5 is controlled to extend, so that the balance beam 6 is connected to the bottom crossbeam of the middle section 3 of the derrick through the positioning pin. Step Six: As Figure 21 As shown, release the automatic locking pin assembly 9 between the upper section 4 and the bottom section 1 of the derrick, and the lifting cylinder 5 continues to extend until the locking pin hole of the middle section 3 of the derrick is aligned with the locking pin in the automatic locking pin assembly 9 of the bottom section 1 of the derrick. Control the automatic locking pin assembly 9 to connect the bottom end of the middle section 3 of the derrick to the top end of the bottom section 1 of the derrick. After the middle section 3 of the derrick and the bottom section 1 of the derrick are fixed, the second platform 8 is hoisted and hooked to the middle section 3 of the derrick. Then connect the locking pin at the lower end of the second platform 8 to complete the fixing of the second platform 8. Step Seven: As Figure 22 As shown, the lifting cylinder is retracted to lower the balance beam 6 back to the drilling platform. The lower section 2 of the derrick is then horizontally hoisted. The connecting shaft at the top of the lower section 2 is attached to the hook at the bottom of the middle section 3 of the derrick. The crane hook is then removed, allowing the lower section 2 of the derrick to slowly sag under gravity until it reaches a free vertical state. Step 8: As Figure 23 As shown, a telescopic cat head is connected to the bottom end of the lower section 2 of the derrick. The horizontal traction force of the telescopic cat head is used to straighten the lower section 2 of the derrick. The middle section 3 of the derrick and the lower section 2 of the derrick are connected through the locking pin hole at the end. The lifting cylinder 5 is extended to control the extension of the lifting cylinder 5. The balance beam 6 is connected to the bottom crossbeam of the lower section 2 of the derrick through the positioning pin. Step Nine: As Figure 24 As shown, the automatic locking pin assembly 9 between the middle section 3 and the bottom section 1 of the derrick is contacted. The lifting cylinder 5 continues to extend until the locking pin hole of the lower section 2 of the derrick is aligned with the locking pin in the automatic locking pin assembly 9 of the bottom section 1 of the derrick. The automatic locking pin assembly 9 is controlled to connect the bottom section of the lower section 2 of the derrick to the top of the bottom section 1 of the derrick. After the lower section 2 of the derrick is fixed to the bottom section 1 of the derrick, the installation of the main body of the derrick is completed.

Claims

1. A quick-assembly and disassembly lifting derrick, characterized in that: The derrick consists of a bottom section (1), a lower section (2), a middle section (3), and an upper section (4) connected by pins from bottom to top. A lifting cylinder (5) that extends and retracts in the vertical direction is provided below the bottom section (1). A balance beam (6) for connecting the bottom end of the lower section (2), the middle section (3), or the upper section (4) is provided at the top of the piston rod of the lifting cylinder (5). A bottom guide rail (7) for guiding the lower section (2) and the middle section (3) is provided vertically at the top of the bottom section (1). A connecting shaft that can be connected to the bottom end of the upper section (4) and the middle section (3) and realize the horizontal rotation of the middle section (3) and the lower section (2) is arranged on one side of the top of the middle section (3) and the lower section (2). The bottom guide rail (7) includes a guide plate (10) with an "L"-shaped cross section and a roller (11) arranged inside the bottom section (1) of the derrick. The upper section (4) of the derrick is provided with a protrusion (12) for engaging the inner side of the guide plate (10). The lower section (2) and the middle section (3) of the derrick are provided with grooves on both sides for the roller (11) to enter. The top of the bottom section (1) of the derrick is provided with an automatic locking pin assembly (9) that can be connected to the bottom end of the upper section (4), the middle section (3), or the lower section (2) of the derrick. The automatic locking pin assembly (9) includes a hydraulic cylinder, a right-angle plate, and a pin that is horizontally slidably disposed on the thigh of the bottom section (1). The cylinder end of the hydraulic cylinder is movably hinged to the bottom section (1) of the derrick. The movable end of the piston rod of the hydraulic cylinder is hinged to one end of the right-angle plate. The middle part of the right-angle plate is hinged to the bottom section (1) of the derrick. The other end of the right-angle plate is connected to a slotted hole at one end of the pin through a hinge. The pin is arranged vertically, with the other end located inside the bottom section (1) of the derrick. The lifting cylinder (5) is arranged on the drilling platform below the derrick, and the balance beam (6) is provided with pins that can be connected to the pin holes of the bottom crossbeams of the lower section (2), middle section (3) and upper section (4) of the derrick respectively.

2. The quick-assembly and disassembly lifting derrick as described in claim 1, characterized in that: A working platform is provided in the middle of the bottom section (1) of the derrick, and the automatic locking pin assembly (9) is located above the working platform.

3. The quick-assembly and disassembly lifting derrick as described in claim 1, characterized in that: The bottom section (1) of the derrick is an A-frame. The bottom of the bottom section (1) includes a fixed end and a movable end hinged to one side of the fixed end. The movable end is arranged at an angle and is connected to the fixed end by a horizontal tie rod.

4. A method for quickly dismantling and installing a lifting derrick, characterized in that, The application of the quick-release and installation lifting derrick according to any one of claims 1-3 includes the following steps: Step 1: Hoist the lifting cylinder (5), install the lifting cylinder (5) into the middle hole of the drill table turntable, install the bottom section (1) of the derrick, then hoist the bottom section (1) of the derrick onto the drill table as a whole, install and connect the bottom section (1) of the derrick to the drill table, then hoist the upper section (4) of the derrick, and introduce the upper section (4) of the derrick into the bottom section (1) of the derrick; Step 2: Extend the lifting cylinder (5) and connect the balance beam (6) at the top of the lifting cylinder (5) to the crossbeam at the bottom of the upper section (4) of the derrick via a pin. Step 3: Control the lifting cylinder (5) to continue extending. When the locking pin hole on the rear thigh of the upper section (4) of the derrick is aligned with the pin in the automatic locking pin assembly (9) of the bottom section (1) of the derrick, control the automatic locking pin assembly (9) to insert the pin and realize the connection between the upper section (4) and the bottom section (1) of the derrick. Step 4: Control the lifting cylinder (5) to retract, so that the balance beam (6) falls back to the drilling platform, and horizontally hoist the middle section (3) of the derrick. Then, hang the connecting shaft on the top side of the middle section (3) of the derrick in the hook of the upper section (4) of the derrick. Remove the crane hook, and the middle section (3) of the derrick will slowly droop under the action of gravity until it is in a free vertical state. Step 5: Connect the telescopic cat head to the bottom of the middle section (3) of the derrick, and straighten the middle section (3) of the derrick by the horizontal traction force of the telescopic cat head. Connect the middle section (3) of the derrick and the upper section (4) of the derrick through the locking pin hole at the end, control the lifting cylinder (5) to extend, and make the balance beam (6) connected to the bottom crossbeam of the middle section (3) of the derrick through the pin shaft. Step 6: Release the automatic locking pin assembly (9) between the upper section (4) and the bottom section (1) of the derrick. The lifting cylinder (5) continues to extend until the locking pin hole of the middle section (3) of the derrick is aligned with the pin in the automatic locking pin assembly (9) of the bottom section (1) of the derrick. Control the automatic locking pin assembly (9) to connect the bottom end of the middle section (3) of the derrick to the top end of the bottom section (1) of the derrick. After the middle section (3) of the derrick and the bottom section (1) of the derrick are fixed, the second platform (8) is hoisted and hooked to the middle section (3) of the derrick. Then connect the locking pin at the lower end of the second platform (8) to complete the fixing of the second platform (8). Step 7: Operate the lifting cylinder to retract, so that the balance beam (6) falls back to the drilling platform, and horizontally hoist the lower section (2) of the derrick. Hang the connecting shaft at the top of the lower section (2) of the derrick on the hook at the bottom of the middle section (3) of the derrick, remove the crane hook, and let the lower section (2) of the derrick slowly droop under the action of gravity until it becomes a free vertical state. Step 8: Connect the telescopic cat head to the bottom of the lower section (2) of the derrick. Use the horizontal traction force of the telescopic cat head to straighten the lower section (2) of the derrick. Connect the middle section (3) of the derrick and the lower section (2) of the derrick through the locking pin hole at the end. Control the lifting cylinder (5) to extend so that the balance beam (6) is connected to the bottom crossbeam of the lower section (2) of the derrick through the pin shaft. Step 9: Release the automatic locking pin assembly (9) between the middle section (3) and the bottom section (1) of the derrick. The lifting cylinder (5) continues to extend until the locking pin hole of the lower section (2) of the derrick is aligned with the pin in the automatic locking pin assembly (9) of the bottom section (1) of the derrick. Control the automatic locking pin assembly (9) to connect the bottom section of the lower section (2) of the derrick to the top of the bottom section (1) of the derrick. After the lower section (2) of the derrick and the bottom section (1) of the derrick are fixed, the installation of the main body of the derrick is completed.

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