Top drive suspension balancing device and balancing top drive device

Abstract

The invention belongs to the technical field of oil field drilling, and particularly relates to a top drive suspension balancing device and a top drive balancing device. The top drive suspension balancing device comprises a balancing device which is of an axisymmetric structure and further comprises a first lifting ring and a second lifting ring, and a first pulley block and a second pulley block are connected through a pulley strut beam; the first pulley block is connected with a first upper lifting ring, the first upper lifting ring is connected with a first lower lifting ring, and the first lower lifting ring is used for being connected with a gearbox. The second pulley block is connected with a second upper lifting ring, the second upper lifting ring is connected with a second lower lifting ring, and the second lower lifting ring is used for connecting a gearbox; the other end of the first balance oil cylinder is connected with the first lower lifting ring; the other end of the second balance oil cylinder is connected with the second lower lifting ring; the first balance oil cylinder and the second balance oil cylinder work to enable the first lower lifting ring and the second lower lifting ring to ascend and descend. When the gear box connecting piece is used for connecting a gear box with a large size, no eccentric weight exists.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil field drilling, and particularly relates to a top drive suspension balancing device and a balanced top drive device. BACKGROUND

[0002] The top drive is a short name of a top drive drilling device of an oil drilling rig, which is composed of a gear box, a power swivel and a pipe handling device, can drive a drill string to rotate and has the function of tightening or loosening the drill string joints, and can move up and down along the guide rail to complete the drilling operation.

[0003] Generally, the top drive is provided with a separate traveling block, and a drilling winch drives the traveling block to travel up and down in the derrick through a drilling rope, and the traveling block is connected to a lifting ring of the top drive, thereby driving the top drive to move up and down in the derrick along the guide rail. The overall height of the conventional lifting ring is large, and the height space is large, and the manufacturing cost is high, especially for light drilling rigs such as truck-mounted drilling rigs, the height limitation causes that three drill rods cannot be connected at one time, only a single drill rod can be connected, the operation efficiency is low, and the labor intensity is high.

[0004] In view of this situation, in order to reduce the overall height of the equipment, a suspension integrated top drive structure appears, such as Chinese patent CN218206570U, which integrates the traveling block and the top drive together, and divides them into left and right pulley groups distributed on the left and right sides of the top drive. The pulleys on the left and right sides are connected to the lifting rings on the left and right sides of the gear box of the top drive.

[0005] In work, the pulleys on the left and right sides need to be connected to the crown block, and the crown block is limited in width and space, so the distance between the left and right pulley groups is generally small; and the left and right pulley groups need to be connected to the gear box, if the gear box is small, the length is less than or equal to the distance between the left and right gear groups, the structure of the above-mentioned patent can satisfy the connection of the gear box, and ensure that the connected gear box will not be unbalanced; but if a gear box with a large length is to be connected, the structure of the above-mentioned patent cannot ensure the connection of the gear box without unbalance.

[0006] At the same time, in the top drive balancing system of the above-mentioned patent, the balance oil cylinder is easy to cause the transverse fracture of the piston rod due to the unbalanced stress and shaking of the upper and lower connections.

[0007] Therefore, the present application is proposed. SUMMARY

[0008] In order to solve the technical problems existing in the prior art, the present application provides a top drive suspension balancing device and a balanced top drive device, which can be used to connect a gear box with a large size without unbalance.

[0009] The present application includes the following technical solutions:

[0010] The first aspect of the present invention provides a top drive suspension balancing device, including a first pulley group, a second pulley group, a first balancing cylinder and a second balancing cylinder, characterized in that the balancing device has an axisymmetric structure, and the balancing device further includes a first lifting ring and a second lifting ring, the first lifting ring including a first upper lifting ring and a first lower lifting ring, and the second lifting ring including a second upper lifting ring and a second lower lifting ring;

[0011] The first pulley block and the second pulley block are connected by a pulley support beam;

[0012] The first pulley block is connected to the first upper lifting ring, the first upper lifting ring is connected to the first lower lifting ring, and the first lower lifting ring is used to connect to the gearbox;

[0013] The second pulley block is connected to the second upper lifting ring, the second upper lifting ring is connected to the second lower lifting ring, and the second lower lifting ring is used to connect to the gearbox;

[0014] One end of the first balance cylinder is connected to the first pulley block, and the other end is connected to the first lower lifting ring;

[0015] One end of the second balance cylinder is connected to the second pulley block, and the other end is connected to the second lower lifting ring;

[0016] The operation of the first and second balance cylinders causes the first and second lower lifting rings to rise and fall.

[0017] Furthermore, the first lower lifting ring includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the second connecting portion and the first connecting portion is parallel to the second connecting portion, the first connecting portion is connected to the first upper lifting ring, and the second connecting portion is used to connect to the gearbox;

[0018] The second lifting ring includes a third connecting part and a fourth connecting part, the third connecting part being connected to the fourth connecting part and parallel to the fourth connecting part, the third connecting part being connected to the second upper lifting ring, and the fourth connecting part being used to connect to the gearbox;

[0019] The distance between the first connecting part and the third connecting part is less than the distance between the third connecting part and the fourth connecting part.

[0020] Furthermore, both the first and second lifting rings are provided with elongated holes, and the extension direction of the elongated holes is the same as that of the first and second lifting rings. Both the first and second lower lifting rings are provided with circular holes, and the elongated holes are connected to the circular holes by a first pin.

[0021] Furthermore, the first lower lifting ring is provided with a first upper lifting ring connecting groove, the first upper lifting ring is disposed in the first upper lifting ring connecting groove, and the circular hole is disposed on the first lifting ring connecting groove;

[0022] The second lower lifting ring is provided with a second upper lifting ring connecting groove, the second upper lifting ring is provided in the second upper lifting ring connecting groove, and the circular hole is provided on the second lifting ring connecting groove.

[0023] Furthermore, the first pin is provided with a limiting structure, the limiting structure including a limiting plate and a bolt, the first pin is provided with a locking groove, the limiting plate is disposed in the locking groove, and the limiting plate is fixed to the first lower lifting ring or the second lower lifting ring by the bolt.

[0024] Furthermore, it also includes a guide shaft and a lifting ring support beam. The two ends of the lifting ring support beam are respectively connected to the first lower lifting ring and the second lower lifting ring. The middle part of the lifting ring support beam is connected to one end of the guide shaft, and the other end of the guide shaft is slidably connected to the pulley support beam.

[0025] Furthermore, the first pulley assembly is connected to the first lifting ring via a second pin, and the second pulley assembly is connected to the second lifting ring via a third pin.

[0026] A second aspect of the present invention provides a balancing top drive device, characterized in that it includes the balancing device and the top drive body described above, wherein the gearbox of the top drive body is provided with a first connecting groove and a second connecting groove at both ends, a first lower lifting ring is disposed in the first connecting groove and fixed by a pin, and a second lower lifting ring is disposed in the second connecting groove and fixed by a pin.

[0027] Furthermore, a limiting mechanism is provided between the first lower lifting ring and the first connecting groove, and a limiting mechanism is provided between the second lower lifting ring and the second connecting groove.

[0028] Furthermore, the limiting mechanism includes a bottom connecting plate of the lifting ring and a first lifting ring limiting block, an adjusting pad, and a second lifting ring limiting block connected in sequence. The first lifting ring limiting block, the adjusting pad, and the second lifting ring limiting block are connected to the first lower lifting ring or the second lower lifting ring through the bottom connecting plate of the lifting ring. The first lifting ring limiting block abuts against the groove wall of the first connecting groove or the groove wall of the second connecting groove, and the second lifting ring limiting block abuts against the first lower lifting ring or the second lower lifting ring.

[0029] By adopting the above technical solution, the present invention has the following advantages:

[0030] 1. The present invention avoids uneven weight distribution when connecting the gearbox by setting a lower lifting ring (including a first lower lifting ring and a second lower lifting ring); and also makes the gearbox more stable.

[0031] 2. The present invention ensures that the balance cylinder (first balance cylinder and second balance cylinder) is subjected to balanced force and avoids shaking by cooperating with the pulley support beam, guide shaft and lifting ring support beam, thus preventing its piston rod from breaking.

[0032] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 Schematic diagram of existing technology Figure 1 ;

[0035] Figure 2 Schematic diagram of existing technology Figure 2 ;

[0036] Figure 3 This is a schematic diagram of the structure of a top-drive suspension balancing device according to an embodiment of the present invention;

[0037] Figure 4 This is a front view of a top-drive suspension balancing device according to an embodiment of the present invention;

[0038] Figure 5 This is a right view of a top-drive suspension balancing device according to an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the connection between the balance cylinder and the support in an embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of the lower lifting ring in an embodiment of the present invention;

[0041] Figure 8 This is a front view of the second pulley group in an embodiment of the present invention;

[0042] Figure 9 This is a left view of the second pulley group in an embodiment of the present invention;

[0043] Figure 10 This is a cross-sectional view of the second pulley group in an embodiment of the present invention;

[0044] Figure 11 This is a front view of the first and second balance cylinders of a top drive suspension balancing device according to an embodiment of the present invention after they have jumped.

[0045] In the diagram: 10 - Gearbox; 20 - Wire rope; 30 - First pulley block; 40 - Second pulley block; 41 - Bearing; 42 - Pulley spindle; 43 - Spindle bushing; 44 - Bearing plate; 45 - Spindle nut; 46 - Pulley; 47 - Bearing end cover; 48 - Upper pin; 49 - Lower pin; 410 - Upper cover plate; 411 - Middle cover plate; 412 - Lower cover plate; 413 - Spindle limit block; 414 - Cover plate fixing shaft; 416 - Slotted nut; 417 - Lower pin nut; 50 - First balance cylinder; 60 - Second balance cylinder; 70 - First lifting cylinder. Ring, 71-First upper lifting ring, 72-First lower lifting ring, 721-First connecting part, 722-Second connecting part, 80-Second lifting ring, 81-Second upper lifting ring, 82-Second lower lifting ring, 821-Third connecting part, 822-Fourth connecting part, 90-Pulley support beam, 100-Guide shaft, 110-Lifting ring support beam, 120-Limiting mechanism, 121-First lifting ring limiting block, 122-Adjusting pad, 123-Second lifting ring limiting block, 124-Bottom connecting plate of lifting ring, 130-Limiting structure, 131-Limiting plate, 132-Bolt. Detailed Implementation

[0046] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] like Figure 1 , Figure 2 The attached figure, a prior art diagram, illustrates two possible ways to connect the lifting rods to the gearbox when the size of the gearbox exceeds the distance between the two lifting rods:

[0049] (1) As Figure 1 As shown, a connecting groove is opened in the middle of the gearbox to connect the lifting rod. However, this will affect the arrangement of the gears and other structures inside the gearbox, and the connection position in the middle of the gearbox will make the gearbox less stable after connection.

[0050] (2) Figure 2 As shown, the lifting rod is connected to the connecting slots at both ends of the gearbox via tools such as steel wire ropes. However, this method results in an inclined pulling force on the gearbox, causing the gearbox to be unbalanced.

[0051] Therefore, to solve the above problems, this embodiment provides a top-drive suspension balancing device, such as... Figure 3 , Figure 4 As shown, the device includes a first pulley block 30, a second pulley block 40, a first balance cylinder 50, and a second balance cylinder 60. The balancing device has an axisymmetric structure. The balancing device also includes a first lifting ring 70 and a second lifting ring 80. The first lifting ring 70 includes a first upper lifting ring 71 and a first lower lifting ring 72. The second lifting ring 80 includes a second upper lifting ring 81 and a second lower lifting ring 82.

[0052] The first pulley block 30 and the second pulley block 40 are connected by a pulley support beam 90; the first pulley block 30 is connected to the first upper lifting ring 71, the first upper lifting ring 71 is connected to the first lower lifting ring 72, and the first lower lifting ring 72 is used to connect to the gearbox; the second pulley block 40 is connected to the second upper lifting ring 81, the second upper lifting ring 81 is connected to the second lower lifting ring 82, and the second lower lifting ring 82 is used to connect to the gearbox; by using the first lower lifting ring 72 and the second lower lifting ring 82 to connect to the gearbox, it can adapt to the connection of gearboxes of different sizes, especially when the length of the gearbox exceeds the distance between the first upper lifting ring 71 and the second upper lifting ring 81.

[0053] The connection method of the 46 pulley groups (including the first pulley group 30 and the second pulley group 40) and the lifting rings (including the first lifting ring 71 and the second lifting ring 81) is not limited in this invention; the connection method in this embodiment is as follows: Figure 3 , Figure 4 , Figure 5 As shown, pulley group 46 is connected to the lifting ring via a pin, which facilitates disassembly, inspection, or replacement. To prevent the pin from rotating and reduce wear, a limiting structure 130 is provided on the pin. The limiting structure 130 includes a limiting plate 131 and a bolt 132. A locking groove is provided on the pin, and the limiting plate 131 is locked in the locking groove. The limiting plate 131 is fixed to pulley group 46 by bolt 132. It should be noted that... Figure 3 , Figure 4 The fit between the limiting structure 130 and the pin is not shown in the figure. The fit between the limiting structure 130 and the pin is the same as the fit between the pin and the limiting structure 130 used in the support of the balance cylinder.

[0054] like Figure 3 , Figure 4As shown, supports are provided on the 46 sets of pulleys (including the first pulley set 30 and the second pulley set 40). At the same time, supports are also provided on the lower lifting rings (including the first lower lifting ring 72 and the second lower lifting ring 82). One end of the first balance oil cylinder 50 is connected to the support provided on the first pulley set 30, and the other end is connected to the support provided on the first lower lifting ring 72; one end of the second balance oil cylinder 60 is connected to the second pulley set 40, and the other end is connected to the second lower lifting ring 82; the first balance oil cylinder 50 and the second balance oil cylinder 60 work to lift and lower the first lower lifting ring 72 and the second lower lifting ring 82.

[0055] As Figure 6 shown, it is a schematic structural diagram of the connection of the supports of the 46 sets of pulleys. The figure shows the cooperation between the limiting structure 130 and the pin shaft. The limiting structure 130 is used to limit the rotation of the pin shaft and reduce wear.

[0056] In some embodiments of the first lower lifting ring 72 and the second lower lifting ring 82, as Figure 4 、 Figure 7 shown, preferably, the first lower lifting ring 72 includes a first connecting portion 721 and a second connecting portion 722. The first connecting portion 721 is connected to the second connecting portion 722, and the first connecting portion 721 is parallel to the second connecting portion 722. The first connecting portion 721 is connected to the first upper lifting ring 71, and the second connecting portion 722 is used to connect the gearbox; the second lifting ring 80 includes a third connecting portion 821 and a fourth connecting portion 822. The third connecting portion 821 is connected to the fourth connecting portion 822, and the third connecting portion 821 is parallel to the fourth connecting portion 822. The third connecting portion 821 is connected to the second upper lifting ring 81, and the fourth connecting portion 822 is used to connect the gearbox; the distance between the first connecting portion 721 and the third connecting portion 821 is less than the distance between the third connecting portion 821 and the fourth connecting portion 822; specifically as Figure 4 、 Figure 7 shown, where A represents the distance between the first connecting portion 721 and the third connecting portion 821, and B represents the distance between the second connecting portion 722 and the fourth connecting portion 822, that is, A < B. With such a structure, when connecting a gearbox with a connection dimension exceeding the distance between the first upper lifting ring 71 and the second upper lifting ring 81, the connection slots of the gearbox can be provided at both ends of the gearbox, which can not only ensure the stability of the gearbox but also avoid uneven weight.

[0057] Furthermore, in some embodiments where the first balancing cylinder 50 and the second balancing cylinder 60 operate to raise and lower the first lower lifting ring 72 and the second lower lifting ring 82, preferably, both the first upper lifting ring 71 and the second upper lifting ring 81 are provided with elongated holes, and the extension direction of the elongated holes is the same as the extension direction of the first upper lifting ring 71 and the second upper lifting ring 81. Both the first lower lifting ring 72 and the second lower lifting ring 82 are provided with circular holes, and the elongated holes and the circular holes are connected by a first pin. After the lower lifting rings (first lower lifting ring 72 and second lower lifting ring 82) are set, the lower lifting rings are connected to the gearbox. However, the first balancing cylinder 50 and the second balancing cylinder 60 need to drive the top drive to move up and down. Therefore, this structural connection can ensure the operation of the top drive.

[0058] Furthermore, according to some embodiments of the first lifting ring 72 and the second lifting ring 82, such as Figure 4 As shown in the figure, the first lower lifting ring 72 is provided with a first upper lifting ring 71 connecting groove (not marked in the figure), and the first upper lifting ring 71 is disposed in the first upper lifting ring 71 connecting groove. The first lifting ring 70 connecting groove is provided with the circular hole. The second lower lifting ring 82 is provided with a second upper lifting ring 81 connecting groove, and the second upper lifting ring 81 is disposed in the second upper lifting ring 81 connecting groove. The second lifting ring 80 connecting groove is provided with the circular hole. The lower lifting ring is connected to the upper lifting ring through the connecting groove, which not only makes the connection more stable, but also plays a guiding role when the first balance cylinder 50 and the second balance cylinder 60 drive the lower lifting ring to move. It plays a role in ensuring that the balance cylinder (first balance cylinder 50 and second balance cylinder 60) is subjected to balanced force and avoids shaking, and prevents its piston rod from breaking.

[0059] In some embodiments, the first pin is provided with a limiting structure 130, which includes a limiting plate 131 and a bolt 132. A locking groove is provided on the first pin, and the limiting plate 131 is disposed within the locking groove. The limiting plate 131 is fixed to the first lower lifting ring 72 or the second lower lifting ring 82 by the bolt 132. It should be noted that the cooperation between the limiting structure 130 and the first pin is as follows: Figure 6 As shown, this method is used to limit the rotation of the first pin and reduce wear.

[0060] Furthermore, in some embodiments, such as Figure 3 , Figure 4As shown, it also includes a guide shaft 100 and a lifting ring support beam 110. The two ends of the lifting ring support beam 110 are connected to the first lower lifting ring 72 and the second lower lifting ring 82, respectively. The middle part of the lifting ring support beam 110 is connected to one end of the guide shaft 100, and the other end of the guide shaft 100 is slidably connected to the pulley support beam 90. The cooperation of the pulley support beam 90, the guide shaft 100, and the lifting ring support beam 110 further ensures that the balance cylinders (first balance cylinder 50 and second balance cylinder 60) receive balanced forces and avoids shaking, preventing their piston rods from breaking.

[0061] The first pulley block 30 and the second pulley block 40 are connected to the pulley support beam 90 by bolts 132 and spring washers to ensure the synchronicity of the left and right pulley blocks 46 when the top drive moves up and down. The first lower lifting ring 72 is connected to the lifting ring support beam 110 by bolts 132 and spring washers to ensure the synchronicity of the first pulley block 30 and the second pulley block 46 when the top drive moves up and down. The guide shaft 100 is fixed to the lifting ring support 4 by bolts 132 and spring washers, and the rod of the guide shaft 10018 can move up and down along the light hole of the pulley support beam 90.

[0062] Furthermore, in some embodiments, in the structure of the first pulley block 30 and the second pulley block 40, such as Figure 8 , Figure 9 , Figure 10 As shown, taking the second pulley block 40 as an example, the inner ring of the bearing 41 is fixed on the pulley spindle 42. Spindle bushings 43 are designed at both ends of the bearing 41, and a bearing plate 44 is designed on the outer side of the spindle bushing 43. The bearing plate 44 is axially fixed to the pulley spindle 42 by a spindle nut 45. The pulley 46 is fixed on the outer ring of the bearing 41, with an interference fit at the contact surface, and is assembled by cold mounting the outer ring of the bearing 41. The bearing end cover 47 is fixed to the pulley 46 by screws. The bearing end cover 47 limits the left and right end faces of the bearing 41, and also serves as a dustproof function. A spindle limiting block 413 is designed on the end face of the pulley spindle 42, and a spindle nut 45 limiting block is designed on the spindle nut 45. The spindle limiting block 413 and the spindle nut 45 limiting block are mainly to prevent the spindle nut 45 from loosening and the pulley spindle 42 from rotating. The upper ends of the two bearing plates 44 are fixed together with an upper pin 48 and a slotted nut 416, and the lower ends of the two bearing plates 44 are fixed together with a lower pin 49 and a lower pin nut 417, which is used to improve the load-bearing strength of the entire pulley group 46 structure. In order to prevent sludge and dust from entering the second pulley group 40, an upper cover plate 410, a middle cover plate 411 and a lower cover plate 412 are also designed, which are fixed to the bearing plates 44 by cover plate fixing shafts 414 and locking nuts, respectively.

[0063] This embodiment also provides a balancing top drive device, including the balancing device and the top drive body described above. The gearbox of the top drive body is provided with a first connecting groove and a second connecting groove at both ends. The first lower lifting ring 72 is disposed in the first connecting groove and fixed by a pin. The second lower lifting ring 82 is disposed in the second connecting groove and fixed by a pin.

[0064] Furthermore, in some embodiments, a limiting mechanism 120 is provided between the first lower lifting ring 72 and the first connecting groove, and a limiting mechanism 120 is provided between the second lower lifting ring 82 and the second connecting groove.

[0065] Furthermore, in some embodiments, such as Figure 5 As shown, the limiting mechanism 120 includes a bottom connecting plate 124 for the lifting ring and a first lifting ring 70 limiting block, an adjusting pad 122, and a second lifting ring 80 limiting block connected in sequence. The first lifting ring 70 limiting block, the adjusting pad 122, and the second lifting ring 80 limiting block are connected to the first lower lifting ring 72 or the second lower lifting ring 82 through the bottom connecting plate 124 for the lifting ring. The first lifting ring 70 limiting block abuts against the wall of the first connecting groove or the wall of the second connecting groove, and the second lifting ring 80 limiting block abuts against the first lower lifting ring 72 or the second lower lifting ring 82.

[0066] The limiting mechanism 120 is connected after the lower lifting ring (including the first lower lifting ring 72 and the second lower lifting ring 82) is connected to the connecting groove (including the first connecting groove and the second connecting groove) that extends into the gearbox. This allows adjustment of the number of adjusting shims 122 to ensure that the gearbox connecting groove, the first lifting ring 70 limiting block, the adjusting shim 122, the second lifting ring 80 limiting block, and the lower lifting ring are all pressed tightly without gaps. The bottom connecting plate 124 of the lifting ring is connected to the lower lifting ring, the first lifting ring 70 limiting block, and the second lifting ring 80 limiting block respectively by bolts 132.

[0067] like Figure 3 , Figure 5 As shown, the limiting mechanism 120 is located directly in front of the lower lifting ring. Thus, the lower lifting ring 5 is restricted by the limiting mechanism 120, preventing it from tilting forward or backward. At the same time, the lower lifting ring is synchronized through the connection of the lifting ring support beam 110. The first pulley group 30 and the second pulley group 40 are synchronized through the connection of the pulley support beam 90. Meanwhile, the guide shaft 100 prevents the first pulley group 30 and the second pulley group 40 from tilting forward or backward. Therefore, the piston rod of the balance cylinder is mainly subjected to the force in the vertical direction, reducing the magnitude of the irrelevant radial force.

[0068] When the balancing device of the present invention is in use, its first pulley group 30 and second pulley group 40 need to be connected to the overhead crane. The overhead crane and the pulley group 46 (including the first pulley group 30 and the second pulley group 40) cooperate to lift the balancing device.

[0069] Top drive upward movement working principle: When the top drive is in drilling operation, such as... Figure 4 As shown, the piston rod of the balance cylinder (including the first balance cylinder 50 and the second balance cylinder 60) extends a certain distance. At this time, the balance cylinder acts as a hydraulic spring, providing buffering and shock absorption. When the top drive uncouples, to prevent the weight of the top drive from pressing on the drill bit threads and damaging them, oil enters the rod chamber of the balance cylinder, such as... Figure 11 As shown, the piston rod of the balance cylinder retracts, driving the lower lifting ring of the balance cylinder (including the first lower lifting ring 72 and the second lower lifting ring 82) to rise, thereby driving the gearbox to rise and realizing the function of top drive jumping; during this top drive jumping process, the guide shaft 100 slides in the pulley support beam 90, ensuring that the first pulley group 30 and the second pulley group 40 are in a vertical state, and the first pulley group 30 and the second pulley group 40 move synchronously.

[0070] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of multiple components or the interaction between multiple components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] In the description of this invention, it should be understood that all terms used to indicate orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this invention.

[0073] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A top drive suspension balancing device, comprising a first pulley block (30), a second pulley block (40), a first balancing oil cylinder (50) and a second balancing oil cylinder (60), characterized in that, The balance device is an axisymmetric structure, and the balance device further comprises a first lifting ring (70) and a second lifting ring (80), the first lifting ring (70) comprises a first upper lifting ring (71) and a first lower lifting ring (72), and the second lifting ring (80) comprises a second upper lifting ring (81) and a second lower lifting ring (82); The first pulley block (30) and the second pulley block (40) are connected through a pulley support beam (90); The first pulley block (30) is connected with the first upper lifting ring (71), the first upper lifting ring (71) is connected with the first lower lifting ring (72), and the first lower lifting ring (72) is used for connecting a gear box; The second pulley block (40) is connected with the second upper lifting ring (81), the second upper lifting ring (81) is connected with the second lower lifting ring (82), and the second lower lifting ring (82) is used for connecting a gear box; One end of the first balance oil cylinder (50) is connected with the first pulley block (30), and the other end is connected with the first lower lifting ring (72); One end of the second balance oil cylinder (60) is connected with the second pulley block (40), and the other end is connected with the second lower lifting ring (82); The first balance oil cylinder (50) and the second balance oil cylinder (60) work to make the first lower lifting ring (72) and the second lower lifting ring (82) lift.

2. A top drive suspension and counterbalance device according to claim 1 wherein, The first lower lifting ring (72) comprises a first connecting part (721) and a second connecting part (722), the first connecting part (721) is connected with the second connecting part (722), the first connecting part (721) is parallel to the second connecting part (722), the first connecting part (721) is connected with the first upper lifting ring (71), and the second connecting part (722) is used for connecting the gear box; The second lifting ring (80) comprises a third connecting part (821) and a fourth connecting part (822), the third connecting part (821) is connected with the fourth connecting part (822), the third connecting part (821) is parallel to the fourth connecting part (822), the third connecting part (821) is connected with the second upper lifting ring (81), and the fourth connecting part (822) is used for connecting the gear box; The distance between the first connecting part (721) and the third connecting part (821) is less than the distance between the third connecting part (821) and the fourth connecting part (822).

3. A top drive suspension and counterbalance device according to claim 1 or 2, wherein, The first upper lifting ring (71) and the second upper lifting ring (81) are both provided with an oblong hole, the extension direction of the oblong hole is the same as the extension direction of the first upper lifting ring (71) and the second upper lifting ring (81), the first lower lifting ring (72) and the second lower lifting ring (82) are both provided with a round hole, and the oblong hole and the round hole are connected through a first pin shaft.

4. A top drive suspension and counterbalance device according to claim 3, wherein, The first lower lifting ring (72) is provided with a first upper lifting ring (71) connecting groove, the first upper lifting ring (71) is arranged in the first upper lifting ring (71) connecting groove, and the round hole is arranged on the first lifting ring (70) connecting groove. The second upper lifting ring (81) is arranged in the second upper lifting ring (81) connecting groove of the second lower lifting ring (82), and the round hole is arranged on the second lifting ring (80) connecting groove.

5. A top drive suspension and counterbalance device as claimed in claim 3, wherein, The first pin shaft is provided with a limiting structure (130), the limiting structure (130) comprises a limiting plate (131) and a bolt (132), the first pin shaft is provided with a clamping groove, the limiting plate (131) is arranged in the clamping groove, and the limiting plate (131) is fixed on the first lower lifting ring (72) or the second lower lifting ring (82) through the bolt (132).

6. A top drive suspension and counterbalance device as claimed in claim 1, wherein, Further comprising a guide shaft (100) and a lifting ring support beam (110), both ends of the lifting ring support beam (110) are connected with the first lower lifting ring (72) and the second lower lifting ring (82) respectively, the middle part of the lifting ring support beam (110) is connected with one end of the guide shaft (100), and the other end of the guide shaft (100) is slidingly connected with the pulley support beam (90).

7. A top drive suspension and counterbalance device as claimed in claim 1, wherein, The first pulley block (30) is connected with the first upper lifting ring (71) through a second pin shaft, and the second pulley block (40) is connected with the second upper lifting ring (81) through a third pin shaft.

8. A balanced top drive apparatus, characterized by, The balance device and the top drive body are connected through the first connecting groove and the second connecting groove arranged at both ends of the gear box of the top drive body, the first lower lifting ring (72) is arranged in the first connecting groove and fixed through a pin shaft, and the second lower lifting ring (82) is arranged in the second connecting groove and fixed through a pin shaft.

9. A balanced top drive apparatus as claimed in claim 8, wherein, The first lower lifting ring (72) is provided with a limiting mechanism (120) between the first connecting groove, and the second lower lifting ring (82) is provided with a limiting mechanism (120) between the second connecting groove.

10. A balanced top drive apparatus as claimed in claim 9, wherein, The limiting mechanism (120) comprises a lifting ring bottom connecting plate (124) and a first lifting ring (70) limiting block, an adjusting pad (122) and a second lifting ring (80) limiting block connected in sequence, the first lifting ring (70) limiting block, the adjusting pad (122) and the second lifting ring (80) limiting block are connected with the first lower lifting ring (72) or the second lower lifting ring (82) through the lifting ring bottom connecting plate (124), the first lifting ring (70) limiting block abuts against the groove wall of the first connecting groove or the groove wall of the second connecting groove, and the second lifting ring (80) limiting block abuts against the first lower lifting ring (72) or the second lower lifting ring (82).

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