Well drilling pipe column conveying device and conveying method

Abstract

The invention discloses a well drilling pipe column conveying device and method, and the device comprises a pipe column storage mechanism which is used for storing pipe columns in a layered and stacked manner; and the pipe column pushing mechanism is arranged at the top of the pipe column storage mechanism and used for pushing the pipe columns located in the pushing area of the pipe column pushing mechanism in the axis direction of the pipe column pushing mechanism. According to the invention, a single pipe column stored in the pipe column storage mechanism is transferred into a pushing area of the pipe column pushing mechanism by utilizing the transferring mechanism, then the pipe column is pushed onto the overturning platform by utilizing the pipe column pushing mechanism, and after a hoisting device of a drilling machine is connected with one end of a pipe column thread groove in the overturning platform, the hoisting device is recovered; according to the tubular column pushing mechanism, the horizontal state of the tubular column is gradually moved to the vertical state from the horizontal state in the pulling process, and in the process, the tubular column pushing mechanism moves and turns over along with the tubular column threaded connector, so that the tubular column pushing mechanism and the tubular column threaded connector are relatively static, and abrasion of the threaded connection position is reduced when the tubular column turns over.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling, and in particular to a drilling pipe conveying device and a conveying method. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The pipe string is a steel pipe assembly used in oil drilling rigs or geological drilling rigs to transmit rotational power, mud, and perform drilling operations. In order to meet different drilling depths, the pipe string used in the drilling rig must have the function of splicing and combination.

[0004] At present, the connection between pipe strings is usually achieved through threaded connection. A threaded connector is provided at one end of the pipe string, and a threaded groove adapted to the threaded connector is provided at the other end. Before drilling operations, a large number of pipe strings are first stacked near the drilling point. After the drilling rig is moved into place, the lifting device provided on the drilling rig is used to connect the end of the pipe string with the threaded groove, and then the lifting device is recovered, so that the lying pipe string is gradually moved from a horizontal state to a vertical state during the pulling process. After that, the subsequent pipe string splicing operations can be carried out.

[0005] However, when the pipe string is pulled by the lifting device, one side of the pipe string provided with the threaded connector will move by friction on the ground. Repeating the above operation for a long time will inevitably cause wear on the threads, affecting the connection strength and sealing performance between the pipe strings. Therefore, in order to ensure the safety, efficiency and cost-effectiveness of the drilling operation, a drilling pipe string conveying device is proposed to convey the pipe string to reduce the wear on the pipe string threads. Summary of the invention

[0006] The purpose of the present invention is to provide a drilling pipe conveying device and a conveying method to address the above-mentioned shortcomings, so as to achieve the purpose of reducing the wear of the threaded connection when the pipe is installed.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solution: a drilling pipe conveying device, comprising:

[0008] A pipe string storage mechanism is used for storing pipe strings in layers and stacking them;

[0009] The pipe column pushing mechanism is arranged on the top of the pipe column storage mechanism, and is used to push the pipe column in the pushing area of ​​the pipe column pushing mechanism along its axial direction, and can be turned over and moved together with the pipe column threaded connector;

[0010] A transfer mechanism, used for transferring the tubular column between the tubular column storage mechanism and the pushing area of ​​the tubular column pushing mechanism;

[0011] The flipping platform is used to receive the pipe string pushed out by the pipe string pushing mechanism and cooperate with the pipe string pushing mechanism to continue pushing the pipe string.

[0012] Furthermore, the pipe column storage mechanism includes at least one storage area, which is composed of a U-shaped frame and a plurality of layer plates located within the U-shaped frame, the plurality of layer plates are staggered up and down on the two side walls of the U-shaped frame, a serpentine channel for the pipe column to move up and down is formed between the plurality of layer plates and the U-shaped frame, and the pipe column pushing mechanism is arranged at the top outlet of the serpentine channel.

[0013] Furthermore, the layer plate includes a fixed plate connected to the U-shaped frame, and a rotating plate is arranged on the side of the fixed plate away from the U-shaped frame through a torsion spring. When the torsion spring is in a natural state, the corresponding rotating plate abuts against the adjacent fixed plate at the bottom, and a pushing assembly capable of telescopic movement is arranged at the bottom of the fixed plate. When the pushing assembly is in a contracted state, the pushing assembly does not contact the rotating plate, and when the pushing assembly is in an extended state, the pushing assembly pushes the rotating plate to rotate flush with the fixed plate, and the spacing between the rotating plate and the adjacent U-shaped frame side wall is not less than the outer diameter of the pipe column, so as to allow the pipe column to move from the upper layer plate to the lower layer plate.

[0014] Furthermore, the number of the storage areas is two, and the top fixing plates corresponding to the two storage areas are connected, a first sink groove is arranged between the two top fixing plates, and the pipe column pushing mechanism is arranged in the first sink groove.

[0015] Furthermore, the pipe column pushing mechanism includes a first rack arranged in the first sink groove and two slide plates slidably arranged in the first sink groove, the top of the slide plate is flush with the top fixed plate, a driving assembly for driving the slide plate to move along the length direction of the first sink groove is arranged in the slide plate, a first push plate and a flip motor for driving the first push plate to flip are rotatably arranged on the slide plate away from the flip platform, a positioning pin inserted into the pipe column is arranged on the first push plate, and a second push plate is fixedly arranged on the slide plate close to the flip platform;

[0016] The driving assembly comprises a travel motor embedded in a skateboard, the skateboard is provided with at least two gears meshing with a first rack, and the output end of the travel motor is provided with a chain sprocket component for driving a plurality of gears to rotate synchronously.

[0017] Furthermore, the flip platform includes a receiving plate of the same height as the fixed plate at the top and a plurality of legs arranged at the bottom of the receiving plate, a second sinking groove for the slide to walk is provided on the top of the receiving plate, a second rack meshing with the gear is provided in the second sinking groove, and two side baffles located on both sides of the second sinking groove in the width direction are provided on the top of the receiving plate, and the side baffles are used to guide the pipe column to move;

[0018] The driving assembly can drive the slide plate to transfer from the first sink groove to the second sink groove.

[0019] Furthermore, the transfer mechanism includes two telescopic components arranged on both side walls of the U-shaped frame, connecting rods are arranged on the top of the two telescopic components, electric slides are arranged at both ends of the connecting rods, and two levers are arranged on the electric slides and moved between the two side walls of the U-shaped frame by the electric slides. The U-shaped frame is located between the levers corresponding to the two electric slides, and the pipe column is located in the moving area of ​​the lever, and the lever on one side moves between the receiving plate and the U-shaped frame.

[0020] A drilling pipe conveying method, comprising any one of the drilling pipe conveying devices described above, the method is as follows:

[0021] S1. Hoist the device to the vicinity of the drilling rig according to the location of the drilling rig on site, and make the flip platform away from the pipe storage mechanism and as close to the drilling rig as possible;

[0022] S2. After the lifting operation is completed, the operator first controls the telescopic assembly and the electric slide to adjust the position of the lever, so that the lever moves to one of the storage areas where the pipes are stored in advance, and the pipe to be transferred is placed between two adjacent levers;

[0023] S3. After the adjustment operation is completed, the operator controls the telescopic assembly and the electric slide to adjust the position of the lever again, so that the lever pushes the pipe string up along the serpentine channel until the pipe string is transferred to the pushing area of ​​the pipe string pushing mechanism;

[0024] S4, after the pipe column is transferred to the position, the motor in the pipe column pushing mechanism is started, so that the multiple gears are driven by the chain sprocket component to rotate synchronously, and the sliding plate equipped with gears is used to push the pipe column in the pushing area to transfer to the turning platform by utilizing the meshing relationship between the gears and the first rack and the second rack;

[0025] S5. After the transfer is completed, the lifting device of the drilling rig is connected to the end of the pipe string provided with the threaded groove, and then the lifting device is slowly stretched to make one end of the pipe string tilt up, and the other end gradually approaches the drilling rig. During this process, the slide plate and the positioning pin thereon continue to move with the pipe string, and the first push plate is driven by the flip motor to slowly flip, so that the end of the pipe string away from the drilling rig lifting device remains relatively still with the slide plate until the pipe string is close to a vertical state and separated from the positioning pin;

[0026] S6. After the pipe string is hoisted, repeat the above S2-S5 operations to continuously transport the pipe string to the drilling rig;

[0027] S7. When the pipe string is removed from the drilling rig, the pipe string is transferred from the drilling rig to the top exit of the serpentine channel by performing S5 and S4 operations in reverse. After that, the rotating plate is pushed to rotate flush with the fixed plate by operating the jacking assembly. Then, the S3 operation can be performed in reverse to move the pipe string to the storage area for storage.

[0028] The beneficial effects of the present invention are embodied in:

[0029] The present invention utilizes a transfer mechanism to transfer a single pipe string stored in a pipe string storage mechanism to a pushing area of ​​a pipe string pushing mechanism, and then utilizes the pipe string pushing mechanism to push the pipe string onto a flipping platform. After a lifting device of a drilling rig is connected to one end of a pipe string thread groove on the flipping platform, the lifting device is recovered, so that the lying pipe string is gradually moved from a horizontal state to a vertical state during the pulling process. During this process, the pipe string pushing mechanism moves and flips along with the pipe string threaded connector, so that the pipe string pushing mechanism and the pipe string threaded connector are relatively stationary, thereby reducing the wear of the threaded connection when the pipe string is flipped. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A three-dimensional view of the present invention;

[0031] Figure 2 It is a structural view of the pipe column storage mechanism and the transfer mechanism of the present invention;

[0032] Figure 3 A structural view of the laminate of the present invention;

[0033] Figure 4 It is a partial view of the pipe string pushing mechanism of the present invention;

[0034] Figure 5 A partial cross-sectional view of the skateboard of the present invention;

[0035] Figure 6 It is a structural view of the flip platform of the present invention.

[0036] In the figure:

[0037] 1. Pipe column storage mechanism; 11. U-shaped frame; 12. Layer plate; 121. Fixed plate; 122. Rotating plate; 123. Pushing assembly;

[0038] 2. Pipe column pushing mechanism; 21. First rack; 22. Slide plate; 23. Driving assembly; 24. First push plate; 25. Positioning pin; 26. Second push plate;

[0039] 3. Transfer mechanism; 31. Telescopic assembly; 32. Connecting rod; 33. Electric slide; 34. Push rod;

[0040] 4. Flipping platform; 41. Receiver plate; 42. Support legs; 43. Second rack; 44. Side baffle. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-6 The present invention discloses a drilling pipe conveying device, comprising:

[0043] The pipe string storage mechanism 1 is used for storing the pipe strings in layers and stacking them;

[0044] The pipe string pushing mechanism 2 is arranged on the top of the pipe string storage mechanism 1, and is used to push the pipe string in the pushing area of ​​the pipe string pushing mechanism 2 along its axial direction, and can be turned over and moved together with the pipe string threaded connector;

[0045] The transfer mechanism 3 is used to transfer the pipe string between the pipe string storage mechanism 1 and the pushing area of ​​the pipe string pushing mechanism 2;

[0046] The turning platform 4 is used to receive the pipe string pushed out by the pipe string pushing mechanism 2 and cooperate with the pipe string pushing mechanism 2 to continue pushing the pipe string.

[0047] The present invention moves the pipes to be installed into the pipe storage mechanism 1 in advance and stacks them in layers. When the drilling rig needs to splice pipes, the transfer mechanism 3 is used to transfer the single pipe stored in the pipe storage mechanism 1 to the pushing area of ​​the pipe pushing mechanism 2. The pipe pushing mechanism 2 is then used to push the pipe onto the flip platform 4. After the drilling rig's lifting device is connected to one end of the pipe thread groove on the flip platform 4, the lifting device is recovered, so that the lying pipe is gradually moved from a horizontal state to a vertical state during the pulling process. During this process, the pipe pushing mechanism 2 moves and flips with the pipe threaded connector, so that the pipe pushing mechanism 2 and the pipe threaded connector are relatively still, thereby reducing the wear on the threaded connection when the pipe is flipped.

[0048] In one embodiment, the pipe column storage mechanism 1 includes at least one storage area, which is composed of a U-shaped frame 11 and a plurality of layer plates 12 located in the U-shaped frame 11. The plurality of layer plates 12 are staggered up and down on the two side walls of the U-shaped frame 11. A serpentine channel for the pipe column to move up and down is formed between the plurality of layer plates 12 and the U-shaped frame 11, and the pipe column pushing mechanism 2 is arranged at the top outlet of the serpentine channel.

[0049] This design makes full use of the vertical space of the site by placing multiple pipes one by one in the serpentine channel, and when the transfer mechanism 3 takes the pipes, the pipes can be moved one by one to the top exit of the serpentine channel, making it easier for the pipe pushing mechanism 2 to push the pipes.

[0050] In one embodiment, the layer plate 12 includes a fixed plate 121 connected to the U-shaped frame 11, and a rotating plate 122 is provided on the side of the fixed plate 121 away from the U-shaped frame 11 through a torsion spring. When the torsion spring is in a natural state, the corresponding rotating plate 122 abuts against the bottom adjacent fixed plate 121, and a telescopically movable pushing assembly 123 is provided at the bottom of the fixed plate 121. When the pushing assembly 123 is in a retracted state, the pushing assembly 123 does not contact the rotating plate 122. When the pushing assembly 123 is in an extended state, the pushing assembly 123 pushes the rotating plate 122 to rotate flush with the fixed plate 121, and the distance between the rotating plate 122 and the side wall of the adjacent U-shaped frame 11 is not less than the outer diameter of the pipe column, which is used for the pipe column to move from the upper layer plate 12 to the lower layer plate 12.

[0051] With this design, when the pipe column moves up along the serpentine channel, the upper rotating plate 122 is first pushed to flip upward, so that the pipe column passes over the rotating plate 122 and moves to the corner of the serpentine channel. Then, the rotating plate 122 is reset under the action of the torsion spring, so that the rotating plate 122 abuts against the adjacent fixed plate 121 at the bottom, providing a channel for the lower pipe column to move upward, so that it can roll to the upper fixed plate 121 through the rotating plate 122. By repeating the above operation, it can gradually move to the top exit of the serpentine channel. When the pipe column needs to be stacked in the serpentine channel, by starting the pushing assembly 123, the pushing assembly 123 is in an extended state, and each rotating plate 122 is pushed to rotate to be flush with the fixed plate 121, so that the downward movement of the pipe column is not blocked by the rotating plate 122, so that it can roll downward along the serpentine channel to complete the stacking of multiple pipe columns.

[0052] In a specific implementation, in order to ensure that the rotating plate 122 can work normally, the pipe columns need to be stacked so that they are not in the downward rotating area of ​​the rotating plate 122 .

[0053] Preferably, the push assembly 123 can adopt hydraulic telescopic components, pneumatic telescopic components and electric telescopic components in the prior art, all of which are mature prior art and will not be described in detail here.

[0054] In one embodiment, there are two storage areas, and the top fixing plates 121 corresponding to the two storage areas are connected. A first sink is provided between the two top fixing plates 121, and the pipe column pushing mechanism 2 is provided in the first sink.

[0055] This design allows the pipes removed from the drilling rig and the pipes not yet installed on the drilling rig to be stored separately in two storage areas, making it convenient for subsequent staff to perform maintenance on the removed pipes.

[0056] In one embodiment, the pipe column pushing mechanism 2 includes a first rack 21 arranged in the first sink groove and two slide plates 22 slidably arranged in the first sink groove, the top of the slide plate 22 is flush with the top fixed plate 121, and a driving assembly 23 for driving the slide plate 22 to move along the length direction of the first sink groove is arranged in the slide plate 22, a first push plate 24 and a flip motor for driving the first push plate 24 to flip are rotatably arranged on the slide plate 22 away from the flip platform 4, a positioning pin 25 inserted into the pipe column is arranged on the first push plate 24, and a second push plate 26 is fixedly arranged on the slide plate 22 close to the flip platform 4;

[0057] The driving assembly 23 includes a traveling motor embedded in the slide plate 22 . The slide plate 22 is provided with at least two gears meshing with the first rack 21 . The output end of the traveling motor is provided with a chain sprocket component for driving the multiple gears to rotate synchronously.

[0058] Such a design enables the slide plate 22 to move along the first trough under the cooperation of the driving assembly 23 and the first rack 21. When the pipe column to be moved is transferred between the first push plate 24 and the second push plate 26, the pipe column can be transferred between the pipe column storage mechanism 1 and the flip platform 4 by changing the travel direction of the two slide plates 22. Moreover, since the first push plate 24 is rotatably arranged on the slide plate 22 and can be driven by the flip motor to change direction, after the positioning pin 25 is inserted into the threaded connector of the pipe column, the first push plate 24 can move with the pipe column when the pipe column is flipped, thereby achieving the purpose of reducing the wear of the threaded connector of the pipe column.

[0059] It should be noted that the chain sprocket components are common knowledge in the art, so the specific structural composition and working principle thereof will not be described in detail in this article.

[0060] In one embodiment, the flip platform 4 includes a receiving plate 41 of the same height as the top fixed plate 121 and a plurality of legs 42 arranged at the bottom of the receiving plate 41. A second sink groove for the slide plate 22 to move is provided at the top of the receiving plate 41. A second rack 43 meshing with the gear is provided in the second sink groove. Two side baffles 44 located on both sides of the second sink groove in the width direction are provided at the top of the receiving plate 41. The side baffles 44 are used to guide the pipe column to move.

[0061] The driving assembly 23 can drive the slide plate 22 to transfer from the first sink groove to the second sink groove.

[0062] Such a design ensures that after the slide plate 22 is transferred from the first sink groove to the second sink groove, it can still continue to move in the second sink groove under the cooperation of the driving assembly 23 and the second rack 43.

[0063] In one embodiment, the transfer mechanism 3 includes two telescopic components 31 arranged on the two side walls of the U-shaped frame 11, and the top of the two telescopic components 31 is provided with a connecting rod 32, and both ends of the connecting rod 32 are provided with an electric slide 33. The electric slide 33 is provided with two levers 34 driven by the electric slide 33 to move between the two side walls of the U-shaped frame 11. The U-shaped frame 11 is located between the levers 34 corresponding to the two electric slides 33, and the pipe column is located in the moving area of ​​the lever 34, and one side of the lever 34 moves between the receiving plate 41 and the U-shaped frame 11.

[0064] With this design, the telescopic movement of the telescopic assembly 31 cooperates with the horizontal movement of the electric slide 33 to drive the two levers 34 on the same side to move to the two sides of the pipe column that needs to be transported, so that the pipe column can be moved between the two side walls of the U-shaped frame 11 by the lever 34. At the same time, due to the limitation of the serpentine channel during the movement, the pipe column can be transferred between the pushing area of ​​the pipe column storage mechanism 1 and the pipe column pushing mechanism 2. Moreover, since the pipe columns are regularly placed in the serpentine channel, the transfer mechanism 3 can pick up and place the pipe columns according to the placement rules of the pipe columns.

[0065] Preferably, the telescopic component 31 can adopt hydraulic telescopic components, pneumatic telescopic components and electric telescopic components in the prior art, all of which are mature prior art and will not be described in detail here.

[0066] A drilling pipe conveying method, comprising any one of the drilling pipe conveying devices, the method is as follows:

[0067] S1. Hoist the device to the vicinity of the drilling rig according to the location of the drilling rig on site, and make the flip platform 4 away from the side of the pipe string storage mechanism 1 as close to the drilling rig as possible;

[0068] S2. After the lifting operation is completed, the operator first controls the telescopic assembly 31 and the electric slide 33 to adjust the position of the lever 34, so that the lever 34 moves to one of the storage areas where the pipe strings are stored in advance, and the pipe string to be transferred is located between two adjacent levers 34;

[0069] S3. After the adjustment operation is completed, the operator controls the telescopic assembly 31 and the electric slide 33 again to adjust the position of the lever 34, so that the lever 34 pushes the pipe string to move upward along the serpentine channel until the pipe string is transferred to the pushing area of ​​the pipe string pushing mechanism 2;

[0070] S4, after the pipe column is transferred to the position, the motor in the pipe column pushing mechanism 2 is started, so that the multiple gears are driven by the chain sprocket component to rotate synchronously, and the slide plate 22 equipped with gears is used to push the pipe column in the pushing area to transfer to the flip platform 4 by utilizing the meshing relationship between the gears and the first rack 21 and the second rack 43;

[0071] S5. After the transfer is completed, the lifting device of the drilling rig is connected to the end of the pipe string with the threaded groove, and then the lifting device is slowly stretched to make one end of the pipe string tilt up, and the other end gradually approaches the drilling rig. During this process, the slide plate 22 and the positioning pin 25 thereon continue to move with the pipe string, and the first push plate 24 is driven by the flip motor to slowly flip, so that the end of the pipe string away from the drilling rig lifting device remains relatively still with the slide plate 22, until the pipe string is close to a vertical state and separated from the positioning pin 25;

[0072] S6. After the pipe string is hoisted, repeat the above S2-S5 operations to continuously transport the pipe string to the drilling rig;

[0073] S7, when the pipe string is removed from the drilling rig, the pipe string is transferred from the drilling rig to the top exit of the serpentine channel by performing S5 and S4 operations in reverse. After that, the rotating plate 122 is pushed to rotate flush with the fixed plate 121 by operating the jacking assembly 123. Then, the S3 operation can be performed in reverse to move the pipe string to the storage area for storage.

[0074] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0075] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0076] In addition, "plurality" means two or more.

[0077] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drilling pipe conveying device, characterized in that: include: A pipe column storage mechanism (1) is used for storing pipe columns in layers and stacking them; The pipe column pushing mechanism (2) is arranged on the top of the pipe column storage mechanism (1) and is used to push the pipe column in the pushing area of ​​the pipe column pushing mechanism (2) along its axial direction and can be turned over and moved together with the pipe column threaded connector; A transfer mechanism (3) is used to transfer the pipe string between the pipe string storage mechanism (1) and the pushing area of ​​the pipe string pushing mechanism (2); The turning platform (4) is used to receive the pipe string pushed out by the pipe string pushing mechanism (2) and cooperate with the pipe string pushing mechanism (2) to continue pushing the pipe string.

2. A drilling pipe conveying device according to claim 1, characterized in that: The pipe column storage mechanism (1) comprises at least one storage area, which is composed of a U-shaped frame (11) and a plurality of layer plates (12) located in the U-shaped frame (11). The plurality of layer plates (12) are arranged vertically and alternately on the two side walls of the U-shaped frame (11). A serpentine channel for the pipe column to move up and down is formed between the plurality of layer plates (12) and the U-shaped frame (11). The pipe column pushing mechanism (2) is arranged at the top outlet of the serpentine channel.

3. A drilling pipe conveying device according to claim 2, characterized in that: The layer plate (12) comprises a fixed plate (121) connected to the U-shaped frame (11); a rotating plate (122) is provided on a side of the fixed plate (121) away from the U-shaped frame (11) through a torsion spring; when the torsion spring is in a natural state, the corresponding rotating plate (122) abuts against the bottom adjacent fixed plate (121); a push assembly (123) capable of telescopic movement is provided at the bottom of the fixed plate (121); when the push assembly (123) is in a contracted state, the push assembly (123) does not contact the rotating plate (122); when the push assembly (123) is in an extended state, the push assembly (123) pushes the rotating plate (122) to rotate to be flush with the fixed plate (121); and the spacing between the rotating plate (122) and the side wall of the adjacent U-shaped frame (11) is not less than the outer diameter of the pipe column, so as to allow the pipe column to move from the upper layer plate (12) to the lower layer plate (12).

4. A drilling pipe conveying device according to claim 3, characterized in that: There are two storage areas, and the top fixing plates (121) corresponding to the two storage areas are connected. A first sink is provided between the two top fixing plates (121), and the pipe column pushing mechanism (2) is provided in the first sink.

5. A drilling pipe conveying device according to claim 4, characterized in that: The pipe column pushing mechanism (2) comprises a first rack (21) arranged in the first sink groove and two slide plates (22) slidably arranged in the first sink groove, the top of the slide plate (22) is flush with the top fixed plate (121), a driving assembly (23) for driving the slide plate (22) to move along the length direction of the first sink groove is arranged in the slide plate (22), a first push plate (24) and a flip motor for driving the first push plate (24) to flip are rotatably arranged on the slide plate (22) away from the flip platform (4), a positioning pin (25) inserted into the pipe column is arranged on the first push plate (24), and a second push plate (26) is fixedly arranged on the slide plate (22) close to the flip platform (4); The driving assembly (23) comprises a travel motor embedded in a slide plate (22), the slide plate (22) being provided with at least two gears meshing with the first rack (21), and the output end of the travel motor being provided with a chain sprocket component for driving the multiple gears to rotate synchronously.

6. A drilling pipe conveying device according to claim 5, characterized in that: The flip platform (4) comprises a receiving plate (41) of the same height as the fixing plate (121) at the top and a plurality of legs (42) arranged at the bottom of the receiving plate (41); a second sink groove for the sliding plate (22) to move is provided at the top of the receiving plate (41); a second rack (43) meshing with the gear is provided in the second sink groove; two side baffles (44) located on both sides of the second sink groove in the width direction are provided at the top of the receiving plate (41); the side baffles (44) are used to guide the pipe column to move; The driving assembly (23) can drive the slide plate (22) to move from the first sink trough to the second sink trough.

7. A drilling pipe conveying device according to claim 6, characterized in that: The transfer mechanism (3) comprises two telescopic components (31) arranged on the two side walls of the U-shaped frame (11), the top of the two telescopic components (31) are both provided with connecting rods (32), both ends of the connecting rods (32) are provided with electric slides (33), the electric slides (33) are provided with two levers (34) driven by the electric slides (33) to move between the two side walls of the U-shaped frame (11), the U-shaped frame (11) is located between the levers (34) corresponding to the two electric slides (33), and the pipe column is located in the moving area of ​​the levers (34), and the levers (34) on one side move between the receiving plate (41) and the U-shaped frame (11).

8. A drilling string conveying method, characterized in that: The method comprises a drilling pipe conveying device as claimed in any one of claims 1 to 7, wherein: S1. Hoist the device to the vicinity of the drilling rig according to the location of the drilling rig on site, and make the flip platform (4) away from the side of the pipe storage mechanism (1) as close to the drilling rig as possible; S2. After the lifting operation is completed, the operator first controls the telescopic assembly (31) and the electric slide (33) to adjust the position of the lever (34), so that the lever (34) moves to one of the storage areas where the pipe columns are stored in advance, and the pipe column to be transferred is located between two adjacent levers (34); S3. After the adjustment operation is completed, the operator again controls the telescopic assembly (31) and the electric slide (33) to adjust the position of the lever (34), so that the lever (34) pushes the pipe string to move upward along the serpentine channel until the pipe string is transferred to the pushing area of ​​the pipe string pushing mechanism (2); S4, after the pipe column is transferred to the position, the motor in the pipe column pushing mechanism (2) is started, so that the multiple gears are driven by the chain sprocket component to rotate synchronously, and the sliding plate (22) equipped with gears is used to push the pipe column in the pushing area to transfer to the turning platform (4) by utilizing the meshing relationship between the gears and the first rack (21) and the second rack (43); S5. After the transfer is completed, the lifting device of the drilling rig is connected to the end of the pipe string provided with the threaded groove, and then the lifting device is slowly stretched, so that one end of the pipe string is tilted and the other end gradually approaches the drilling rig. During this process, the slide plate (22) and the positioning pin (25) thereon continue to move with the pipe string, and the first push plate (24) is driven by the turning motor to slowly turn over, so that the end of the pipe string away from the drilling rig lifting device and the slide plate (22) remain relatively still until the pipe string is close to a vertical state and is separated from the positioning pin (25); S6. After the pipe string is hoisted, repeat the above S2-S5 operations to continuously transport the pipe string to the drilling rig; S7, when the pipe string is removed from the drilling rig, the operations of S5 and S4 are reversed to transfer the pipe string from the drilling rig to the top exit of the serpentine channel. After that, the jacking assembly (123) is operated to push the rotating plate (122) to rotate flush with the fixed plate (121). Then, the operation of S3 can be reversed to move the pipe string to the storage area for storage.

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