Automatic adjusting system and adjusting method for inclination angle of well drilling and workover two-layer operation table

Abstract

The invention relates to the technical field of petroleum equipment and engineering machinery, and provides a system and method for automatically adjusting the inclination angle of a well drilling and workover two-layer operating platform, the system comprises a derrick and a two-layer operating platform rotationally connected with the derrick, and further comprises a rope winding system, and the rope winding system comprises a steel rope, a pulley block, a movable pulley and a second fixed pulley; the two ends of the steel rope are fixed to the top of the derrick and the top of the two-layer operation table respectively, and the steel rope sequentially winds around the second fixed pulley, the pulley block, the movable pulley and the pulley block from the fixing point of the top of the derrick and is finally fixed to the fixing point of the top of the two-layer operation table. A tensioning device is further arranged on one side of the derrick and fixedly connected with a transmission device through a first fixed pulley, and the other end of the transmission device is fixedly connected with a movable pulley. A tilt angle sensor is mounted on the second-layer operation table; the system further comprises a driller control system. The structure is compact, the method is simple and reliable, and an operator can operate in a driller room or a driller box centralized control position.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum equipment and engineering machinery, and in particular to an automatic inclination adjustment system and adjustment method for a second-layer operating platform for drilling and repairing a well. Background Art

[0002] The leveling method of the second-floor operating platform in the field of petroleum equipment and engineering machinery technology mainly relies on manual pre-adjustment of the length of the wire rope. The adjustment of the wire rope is generally carried out when the derrick is horizontal or nearly horizontal. After the adjustment, the derrick is raised to drive the second-floor platform to rotate to a horizontal state to verify the adjustment effect. The initial calculated length of the wire rope usually has a large error from the actual length due to the different angles and tension levels of multiple pulleys. It needs to be adjusted multiple times and the horizontal error of the second-floor operating platform cannot be guaranteed. With the development of automation and intelligence in the fields of petroleum equipment and machinery, the intensity of manual labor is reduced through intelligent control systems to avoid repeated operations. Efficient, intelligent, integrated and multifunctional equipment is the current mainstream development direction. For the leveling of the second-floor operating platform, an automatic inclination adjustment system is urgently needed to improve the convenience of on-site operations and ensure the safety of on-site work.

[0003] Chinese invention patent: Publication number is "CN116480294A", and the name is "Well Drilling and Repairing Derrick Assembly", which discloses a well drilling and repairing derrick assembly, including a derrick body, a front two-layer platform and a rear two-layer platform, wherein the lower end of the derrick body is suitable for connecting to the drilling platform; the front two-layer platform and the rear two-layer platform are respectively arranged at the front and rear sides of the derrick body, and are both suitable for moving in the height direction; wherein the front two-layer platform and the rear two-layer platform are both suitable for forming an operating plane and setting up a pipe string processing system. In this technical solution, the operating plane formed by the front two-layer platform and the rear two-layer platform and the pipe string processing system set up can perform offline drill pipe rooting operations, thereby increasing the operating rate. However, this technical solution cannot adjust the angle of the two-layer operating platform, cannot reduce the intensity of manual labor, and cannot improve the convenience of on-site operations. Summary of the invention

[0004] In order to solve the problem in the prior art that the second-level operating table for drilling and repairing wells needs to be adjusted multiple times manually, resulting in repeated operations and high labor intensity, the present invention proposes an automatic inclination adjustment system and method for the second-level operating table for drilling and repairing wells.

[0005] The present invention is realized by the following technical scheme: it comprises a derrick and a second-layer operating platform arranged in the middle of the derrick, one side of the second-layer operating platform in the width direction is rotatably connected to the derrick, and also comprises a rope winding system, the rope winding system comprises a steel rope, a pulley block arranged at the top of the derrick and fixedly connected to the derrick, a movable pulley arranged at the middle and lower part of the derrick, and a second fixed pulley arranged at the top of the second-layer operating platform away from the derrick and fixedly connected to the second-layer operating platform; the two ends of the steel rope are respectively fixed at the top of the derrick and the top of the second-layer operating platform away from the derrick, the steel rope starts from the fixed point at the top of the derrick, and passes around the second fixed pulley, the pulley block, the movable pulley and the pulley block in sequence, and finally The derrick is finally fixed to a fixed point on the top of the second-floor operating platform away from one end of the derrick; a tensioning device is also provided on one side of the derrick, and the tensioning rope of the tensioning device is fixedly connected to the transmission device via a first fixed pulley arranged at the bottom of the derrick, the transmission device is arranged above the first fixed pulley and fixedly connected to the derrick, and the other end of the transmission device is fixedly connected to the movable pulley; an inclination sensor is installed on the second-floor operating platform; the derrick consists of two sections, the first section is close to the ground, and the second section is far from the ground; the second-floor operating platform is connected to the top of the first section of the derrick; and it also includes a driller control system, which is connected to the tensioning device and the inclination sensor through electrical signals.

[0006] As a further preference, the rope winding system consists of two groups, which are symmetrically arranged with respect to the center line in the width direction of the second-floor operating platform.

[0007] As a further preference, a clamping device is provided between the transmission device and the movable pulley, and the clamping device is connected to the driller control system via an electrical signal.

[0008] As a further preference, a fixing device is fixedly connected to the derrick at a position relative to the movable pulley, and the fixing device is connected to a driller control system via an electrical signal.

[0009] As a further preference, an axial force sensor is provided between the pulley block and the derrick, and the axial force sensor is connected to the driller control system via an electrical signal.

[0010] As a further preference, the automatic inclination adjustment system for the second-level drilling and workover operating platform also includes a remote control system, and the remote control system is connected to the driller's control system through electrical signals.

[0011] The present invention also provides a method for adjusting the automatic inclination adjustment system of the second-level operating platform for drilling and repairing a well, which is applicable to the present invention, comprising the following steps:

[0012] S1. In the initial state of the derrick, adjust the length of the steel rope to keep it consistent;

[0013] S2, the first section of the derrick is rotated and lifted to the set position;

[0014] S3, the second section of the derrick is extended, and the second-level operating platform rotates away from the derrick along with the rope winding system until the second section of the derrick is fully extended;

[0015] S4, the driller control system sends an opening control signal to the clamping device, and the clamping device opens;

[0016] S5. The inclination sensor transmits the inclination data to the driller control system in real time, and the driller control system sends a corresponding control signal to the tensioning device according to the inclination data; if the inclination data is greater than the set value, the driller control system sends a tightening control signal to the tensioning device, the tensioning device is tightened, the movable pulley is moved to the bottom of the derrick through the transmission device, and the second-floor operating table slowly rotates toward the derrick; if the inclination data is less than the set value, the driller control system sends a release control signal to the tensioning device, the tensioning device is released, the movable pulley is moved to the top of the derrick through the transmission device, and the second-floor operating table slowly rotates away from the derrick; if the inclination data is equal to the set value, the driller control system sends a closing control signal to the tensioning device;

[0017] S6, the driller control system sends a closing control signal to the clamping device;

[0018] S7. When the derrick needs to be transferred for transportation, the driller control system sends an opening control signal to the clamping device;

[0019] S8, the driller control system sends a tightening control signal to the tensioning device, the tensioning device starts to tighten slowly, the movable pulley moves to the bottom of the derrick through the transmission device, and the second-floor operating table slowly rotates toward the derrick;

[0020] S9. When the tensioning device reaches the set maximum tension, the driller control system sends a closing control signal to the tensioning device;

[0021] S11, the driller control system sends a closing control signal to the clamping device;

[0022] S12, the second derrick section is retracted until it overlaps with the first derrick section;

[0023] S13, the first section of the derrick rotates and falls horizontally to a level position.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The automatic inclination adjustment system and method of the second-floor drilling and workover operating table designed by the present invention have a compact structure, a simple and reliable method, and the operator can perform the adjustment operation independently through the remote control control panel in a safe area, or can perform the operation in the driller's room or the driller's box centralized control location.

[0026] 2. The automatic inclination adjustment method of the second-layer operating table for drilling and repairing wells designed in the present invention can be used in conjunction with the horizontal detection system to complete the precise leveling of the second-layer operating table, reduce the repetitive leveling work caused by the horizontal problem of the second-layer operating table, avoid the safety hazards caused by leveling problems, reduce the workload of on-site workers, and improve the work efficiency of equipment installation and commissioning.

[0027] 3. The inclination angle of the second-level operating platform for drilling and repairing wells designed in the present invention can be automatically adjusted, making the overall system safe, reliable and more intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 for Figure 1 Right view of .

[0030] Figure 3 It is a partial enlarged schematic diagram of the fixing device and the movable pulley part of the present invention.

[0031] Indicated in the figure:

[0032] 1. Tensioning device; 2. First fixed pulley; 3. Transmission device; 4. Clamping device; 5. Movable pulley; 6. Fixing device; 7. Inclination sensor; 8. Axial force sensor; 9. Steel rope; 10. Pulley block; 11. Derrick; 12. Second-floor operating table; 13. Second fixed pulley. DETAILED DESCRIPTION

[0033] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings.

[0034] like Figure 1 and Figure 2 As shown, the present invention provides an automatic inclination adjustment system for a second-level operating platform for drilling and repairing wells, comprising a derrick 11 and a second-level operating platform 12 disposed in the middle of the derrick 11, and one side of the second-level operating platform 12 in the width direction is rotatably connected to the derrick 11. The adjustment system also includes a rope winding system, and the rope winding system includes a steel rope 9, a pulley block 10, a movable pulley 5, and a second fixed pulley 13. The pulley block 10 is disposed on the top of the derrick 11 and is fixedly connected to the derrick 11, the second fixed pulley 13 is disposed on the top of the second-level operating platform 12 at one end away from the derrick 11 and is fixedly connected to the second-level operating platform 12, and the movable pulley 5 is disposed in the lower middle part of the derrick 11. The two ends of the steel rope 9 are respectively fixed to the top of the derrick 11 and the top of the second-level operating platform 12 at one end away from the derrick 11, that is, Figure 1Part A and Part B in the figure, Part A is the top of the derrick 11, and Part B is the top of the second-floor operating platform 12 away from the derrick 11. Part A and Part B can also be called dead rope points of the steel rope 9. The steel rope 9 starts from the fixed point at the top of the derrick 11, goes around the second fixed pulley 13 on the second-floor operating platform 12, and then returns to the pulley block 10 at the top of the derrick 11, goes around the pulley block 10 at the top of the derrick 11, and then goes to the movable pulley 5 at the middle and lower part of the derrick 11, goes around the movable pulley 5 at the middle and lower part of the derrick 11, and then goes to the pulley block 10 at the top of the derrick 11, and then goes around the pulley block 10 at the top of the derrick 11, and then goes to the fixed point at the top of the second-floor operating platform 12 away from the derrick 11. That is, the steel rope 9 starts from the fixed point at the top of the derrick 11, passes through the second fixed pulley 13, the pulley block 10, the movable pulley 5 and the pulley block 10 in sequence, and is finally fixed to the fixed point at the top of the second-layer operating platform 12 away from the derrick 11. The derrick 11 is generally composed of two sections, the first section close to the ground and the second section away from the ground. The second-layer operating platform 12 is connected to the top of the first section of the derrick 11. In the initial state, that is, in the horizontal or nearly horizontal state, the two sections of the derrick 11 overlap. When working, the first section of the derrick 11 is rotated and lifted first. At this time, the relative position of the second-layer operating platform 12 and the derrick 11 generally does not change or changes very little. When the first section of the derrick 11 rotates to the specified angle, the second section of the derrick 11 begins to extend. At this time, the second-layer operating platform 12 follows the rope winding system to rotate synchronously to the target position. After fully extended, fine adjustments are made to ensure the level of the second-layer operating platform 12. Since the steel rope 9 may be adjusted with error or not in place, during the process of the first section of the derrick 11 rotating and lifting, the second-level operating platform 12 will rotate synchronously with the rope winding system by about 10°.

[0035] The tension of the steel rope 9 can adjust the horizontal angle of the second-layer operating platform 12. The rope winding system is preferably two sets, which are symmetrically arranged relative to the center line of the width direction of the second-layer operating platform 12. Different adjustments of the two steel ropes 9 can achieve the left and right horizontal angles and stress conditions of the second-layer operating platform 12.

[0036] A tensioning device 1 is also provided on one side of the derrick 11, and the tensioning rope of the tensioning device 1 is fixedly connected to the transmission device 3 via the first fixed pulley 2 provided at the bottom of the derrick 11. The transmission device 3 is provided above the first fixed pulley 2 and fixedly connected to the derrick 11. The other end of the transmission device 3 is fixedly connected to the movable pulley 5. In order to lock the steel rope 9 after adjustment and avoid the tensioning device 1 being in a working state for a long time and thus shortening its service life, a clamping device 4 can be provided between the transmission device 3 and the movable pulley 5.

[0037] like Figure 3As shown, a fixing device 6 can be provided at the relative position of the movable pulley 5, and the relative position of the movable pulley 5 is the moving distance of the movable pulley 5 under the maximum and minimum tensioning degrees of the tensioning device 1. The fixing device 6 is fixedly connected to the derrick 11. The fixing device 6 is a safety device, and like the clamping device 4, it is also a locking structure, which can lock the movable pulley 5 in a fixed position of the derrick 11. When the second-floor operating platform 12 is adjusted into place or transported or an emergency stop is required, the fixing device 6 can be used for a safe fixing action.

[0038] The tensioning device 1 can adjust the position of the movable pulley 5 through the transmission device 3, and the movement of the movable pulley 5 can drive the steel rope 9 to perform tensioning and other adjustment actions.

[0039] The second-layer operating platform 12 is equipped with an inclination sensor 7, which can record the inclination data between the second-layer operating platform 12 and the derrick 11 in real time and transmit it to the driller control system. When the feedback data does not match the preset data, the driller control system can directly or indirectly control the tensioning device 1 through an electrical signal to adjust the position of the movable pulley 5, and then adjust the inclination value of the second-layer operating platform 12 through the steel rope 9.

[0040] An axial force sensor 8 may also be provided between the pulley block 10 and the derrick 11. The axial force sensor 8 and the tensioning device 1 may provide feedback on the magnitude of the force borne by the steel rope 9. The two steel ropes 9 may be adjusted individually by the feedback of the difference in the magnitude of the force borne by the two steel ropes 9. When the force numerical error transmitted by the axial force sensor 8 is greater than a preset value, the driller control system will alarm the operator to ensure the balance of both sides under the working stress state of the second-floor operating platform 12, and at the same time ensure the safety of the operator above the second-floor operating platform 12.

[0041] According to the original control adjustment and working habits, after the second-layer operating platform 12 is leveled, it is necessary to stand at a position far away from the side of the vehicle to observe the angle and other conditions of the second-layer operating platform 12. After adding the remote control system, the remote control system can transmit and receive electrical signals to link with the driller control system, so that the operation can be performed at a long distance from the vehicle, which is more in line with the operating habits of on-site use and greatly increases the convenience of on-site operation.

[0042] When the whole vehicle needs to be transferred for transportation, the tensioning device 1 can tighten the steel rope 9 to the maximum extent through the transmission device 3. At this time, the second-level operating platform 12 can be firmly fixed on the derrick 11 at a reasonable position, ensuring the transportation height and reducing safety hazards during transportation.

[0043] When the horizontal angle of the second-layer operating platform 12 is adjusted and the forces on both sides are normal, consider locking the position of the second-layer operating platform 12. The driller control system can directly or the remote control system can indirectly control the clamping device 4 to lock the transmission device 3 through electrical signals. Similarly, the clamping device 4 needs to be opened to lock the transmission device 3 when the position needs to be adjusted next time.

[0044] The automatic inclination adjustment system for the second-floor operation platform of drilling and repairing wells also includes a driller control system and a remote control system. The driller control system is connected with the tensioning device 1, the clamping device 4, the fixing device 6, the inclination sensor 7, the axial force sensor 8 and the remote control system through electrical signals, and is used to receive the force value transmitted by the tensioning device 1 and the axial force sensor 8, the inclination data between the second-floor operation platform 12 and the derrick 11 transmitted by the inclination sensor 7, the control signal transmitted by the remote control system, and the opening and closing control signals sent to the clamping device 4, the fixing device 6 and the tensioning device 1. The driller control system can also send the force value and inclination data to the remote control system. The remote control system is connected with the driller control system through electrical signals, and is used to indirectly control the tensioning device 1, the clamping device 4 and the fixing device 6.

[0045] The present invention also provides a method for adjusting the automatic inclination adjustment system of the second-level operating platform for drilling and repairing a well, which is applicable to the present invention, comprising the following steps:

[0046] Step 1: In the initial state of the derrick 11, adjust the length of the steel rope 9 to keep it consistent.

[0047] Step 2: The first section of the derrick 11 is rotated and lifted to a set position.

[0048] Step 3: The second section of the derrick 11 is extended, and the second-level operating platform 12 rotates along with the rope winding system in a direction away from the derrick 11 until the second section of the derrick 11 is fully extended.

[0049] Step 4: The driller control system sends an opening control signal to the clamping device 4, and the clamping device 4 opens.

[0050] Step 5, the inclination sensor 7 transmits the inclination data to the driller control system in real time, and the driller control system sends a corresponding control signal to the tensioning device 1 according to the inclination data; if the inclination data is greater than the set value, the driller control system sends a tightening control signal to the tensioning device 1, the tensioning device 1 is tightened, and the movable pulley 5 is moved to the bottom of the derrick 11 through the transmission device 3, and the second-floor operating table 12 slowly rotates toward the derrick 11; if the inclination data is less than the set value, the driller control system sends a release control signal to the tensioning device 1, the tensioning device 1 is released, and the movable pulley 5 is moved to the top of the derrick 11 through the transmission device 3, and the second-floor operating table 12 slowly rotates away from the derrick 11; if the inclination data is equal to the set value, the driller control system sends a closing control signal to the tensioning device 1.

[0051] Step 6: The driller control system sends a closing control signal to the clamping device 4.

[0052] Step 7: When the derrick 11 needs to be transported to another site, the driller control system sends an opening control signal to the clamping device 4.

[0053] Step 8: The driller control system sends a tightening control signal to the tensioning device 1 , and the tensioning device 1 starts to tighten slowly. The movable pulley 5 moves toward the bottom of the derrick 11 through the transmission device 3 , and the second-floor operating platform 12 slowly rotates toward the derrick 11 .

[0054] Step 9: When the tensioning device 1 reaches the set maximum tension, the driller control system sends a closing control signal to the tensioning device 1.

[0055] Step 11: The driller control system sends a closing control signal to the clamping device 4.

[0056] Step 12: The second section of the derrick 11 is retracted until it overlaps with the first section of the derrick 11 .

[0057] Step 13: The first section of the derrick 11 rotates and falls in a horizontal direction to be horizontal.

[0058] The present invention provides an automatic inclination adjustment system and method for a second-floor operating table for drilling and repairing a well. The system and method are reliable and simple. The operator can perform the adjustment operation independently through the remote control control panel in a safe area, or can perform the operation in the driller's room or the driller's box centralized control. The system and method are used in conjunction with the horizontal detection system to complete the precise leveling of the second-floor operating table. The repetitive leveling work caused by the horizontal problems of the second-floor operating table is reduced, the safety hazards caused by the leveling problems are avoided, the workload of on-site workers is reduced, and the work efficiency of equipment installation and commissioning is improved. The automatic inclination adjustment system of the second-floor operating table makes the product control more integrated and more intelligent, and the additional functions of the product are also greatly improved.

[0059] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. An automatic inclination adjustment system for a second-layer operating platform for drilling and repairing a well, comprising a derrick (11) and a second-layer operating platform (12) arranged in the middle of the derrick (11), wherein one side of the second-layer operating platform (12) in the width direction is rotatably connected to the derrick (11), characterized in that: The utility model also comprises a rope winding system, wherein the rope winding system comprises a steel rope (9), a pulley block (10) arranged at the top of a derrick (11) and fixedly connected to the derrick (11), a movable pulley (5) arranged at the middle and lower part of the derrick (11), and a second fixed pulley (13) arranged at the top of the end of the second-layer operating platform (12) away from the derrick (11) and fixedly connected to the second-layer operating platform (12); the two ends of the steel rope (9) are respectively fixed to the top of the derrick (11) and the top of the end of the second-layer operating platform (12) away from the derrick (11); the steel rope (9) starts from the fixed point at the top of the derrick (11), passes around the second fixed pulley (13), the pulley block (10), the movable pulley (5) and the pulley block (10) in sequence, and is finally fixed to the top of the end of the second-layer operating platform (12) away from the derrick (11). A fixed point; a tensioning device (1) is also provided on one side of the derrick (11); a tensioning rope of the tensioning device (1) is fixedly connected to a transmission device (3) via a first fixed pulley (2) provided at the bottom of the derrick (11); the transmission device (3) is provided above the first fixed pulley (2) and fixedly connected to the derrick (11); the other end of the transmission device (3) is fixedly connected to a movable pulley (5); an inclination sensor (7) is installed on the second-layer operating platform (12); the derrick (11) is composed of two sections, the first section close to the ground and the second section away from the ground; the second-layer operating platform (12) is connected to the top of the first section of the derrick (11); and a driller control system is also included, the driller control system is connected to the tensioning device (1) and the inclination sensor (7) through electrical signals.

2. The automatic inclination adjustment system for the second-level operation platform for drilling and repairing a well according to claim 1 is characterized by: The rope winding system consists of two groups, which are symmetrically arranged relative to the center line of the width direction of the second-layer operating platform (12).

3. The automatic inclination adjustment system for the second-level operation platform for drilling and repairing a well according to claim 2 is characterized by: A clamping device (4) is provided between the transmission device (3) and the movable pulley (5), and the clamping device (4) is connected to a driller control system via an electrical signal.

4. The automatic inclination adjustment system for the second-level operation platform for drilling and repairing a well according to claim 3 is characterized by: A fixing device (6) is fixedly connected to the derrick (11) at a position relative to the movable pulley (5), and the fixing device (6) is connected to a driller control system via an electrical signal.

5. The automatic inclination adjustment system for the second-level operation platform for drilling and repairing a well according to claim 3 is characterized by: An axial force sensor (8) is provided between the pulley block (10) and the derrick (11), and the axial force sensor (8) is connected to a driller control system via an electrical signal.

6. The automatic inclination adjustment system for the second-level operation platform of drilling and repairing wells according to claim 3 is characterized by: The automatic inclination adjustment system for the second-level operating platform of drilling and repairing wells also includes a remote control system, and the remote control system is connected to the driller's control system through electrical signals.

7. An adjustment method for the automatic inclination adjustment system of the second-level operating platform for drilling and repairing a well according to any one of claims 3 to 6, characterized in that: The steps include: S1. In the initial state of the derrick (11), the length of the steel rope (9) is adjusted to remain consistent; S2, the first section of the derrick (11) is rotated and raised to a set position; S3, the second section of the derrick (11) is extended, and the second-level operating platform (12) rotates along with the rope winding system in a direction away from the derrick (11) until the second section of the derrick (11) is fully extended; S4, the driller control system sends an opening control signal to the clamping device (4), and the clamping device (4) opens; S5, the inclination sensor (7) transmits the inclination data to the driller control system in real time, and the driller control system sends a corresponding control signal to the tensioning device (1) according to the inclination data; if the inclination data is greater than the set value, the driller control system sends a tightening control signal to the tensioning device (1), the tensioning device (1) is tightened, and the movable pulley (5) is moved toward the bottom of the derrick (11) through the transmission device (3), and the second-floor operating table (12) slowly rotates toward the derrick (11); if the inclination data is less than the set value, the driller control system sends a release control signal to the tensioning device (1), the tensioning device (1) is released, and the movable pulley (5) is moved toward the top of the derrick (11) through the transmission device (3), and the second-floor operating table (12) slowly rotates in a direction away from the derrick (11); if the inclination data is equal to the set value, the driller control system sends a closing control signal to the tensioning device (1); S6, the driller control system sends a closing control signal to the clamping device (4); S7, when the derrick (11) needs to be transferred for transportation, the driller control system sends an opening control signal to the clamping device (4); S8, the driller control system sends a tightening control signal to the tensioning device (1), the tensioning device (1) starts to tighten slowly, the movable pulley (5) moves toward the bottom of the derrick (11) through the transmission device (3), and the second-floor operating table (12) slowly rotates toward the derrick (11); S9, when the tensioning device (1) reaches the set maximum tension, the driller control system sends a closing control signal to the tensioning device (1); S11, the driller control system sends a closing control signal to the clamping device (4); S12, the second section of the derrick (11) is retracted until it overlaps with the first section of the derrick (11); S13, the first section of the derrick (11) rotates and falls in the horizontal direction until it is horizontal.

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