Drilling and repairing integrated iron roughneck

Abstract

The invention relates to a drilling and repairing integrated iron roughneck which comprises a spinning clamp assembly, a floating assembly, a C-shaped frame, a punching clamp assembly, a centering clamp assembly, a telescopic arm assembly, a lifting pulley and a stand column. The spinning clamp assembly is movably installed at the top of the C-shaped frame through the floating assembly, the punching clamp assembly and the centering clamp assembly are arranged in the C-shaped frame, and the punching clamp assembly is located above the centering clamp assembly; one end of the telescopic arm assembly is rotatably mounted on the lifting pulley, the rotating axis of the telescopic arm assembly is transversely oriented, the C-shaped frame is rotatably mounted at the other end of the telescopic arm assembly, and the rotating axis of the C-shaped frame is transversely oriented; the lifting tackle is installed on the stand column in an up-down moving mode. The floating assembly can drive the spinning clamp assembly to float up and down so as to perform displacement compensation on the pipe in the vertical direction when the spinning clamp assembly performs spinning, and the floating assembly has the beneficial effects that the displacement of the pipe in the vertical direction when the spinning clamp assembly performs spinning is effectively compensated, so that the risk of pipe thread damage is reduced, and the sealing integrity and the structural stability of pipe connection are improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas drilling, and in particular to an integrated drilling and repairing iron roughneck. Background Art

[0002] In the field of oil and gas drilling and well repair operations, the connection and removal of pipes is extremely important and the task is arduous. Traditional operation methods mostly rely on manual use of tools such as pliers to screw and punch pipes, which is not only extremely labor-intensive and inefficient, but also has many safety hazards. With the expansion of oil and gas production and the increasing complexity of the production environment, the demand for automation, efficiency and precision of pipe operation equipment has become more urgent.

[0003] During the drilling process, pipes need to be connected and disassembled. At present, traditional screw-in equipment lacks an effective displacement compensation mechanism. During the screw-in process, due to the weight of the pipe itself, the complex stress conditions in the well, and the influence of the wellhead device, the pipe is prone to slight displacement fluctuations in the vertical direction. Traditional screw-in pliers are difficult to adapt to such dynamic changes, resulting in reduced screw-in accuracy, easy to cause thread damage, affecting the sealing and overall strength of the pipe connection, and even causing safety accidents such as pipe leakage and falling off in severe cases, bringing huge losses and risks to oil and gas production. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a drilling and repairing integrated iron roughneck, which solves the technical problems of the prior art.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] The invention provides an integrated drilling and repairing iron roughneck, comprising a screwdriver assembly, a floating assembly, a C-frame, a punching clamp assembly, a centering clamp assembly, a telescopic arm assembly, a lifting pulley and a column; the screwdriver assembly is movably mounted on the top of the C-frame through the floating assembly, the punching clamp assembly and the centering clamp assembly are arranged in the C-frame, and the punching clamp assembly is located above the centering clamp assembly; one end of the telescopic arm assembly is rotatably mounted on the lifting pulley, and its rotation axis is oriented horizontally, and the C-frame is rotatably mounted on the other end of the telescopic arm assembly, and its rotation axis is oriented horizontally; the lifting pulley is movably mounted on the column; the floating assembly can drive the screwdriver assembly to float up and down, so as to compensate for the displacement of the pipe in the vertical direction when the screwdriver assembly is screwed.

[0009] Optionally, the spin-lock pliers assembly includes a spin-lock bracket, two spin-lock pliers arms, an opening and closing drive and two spin-lock mechanisms; the spin-lock bracket is installed on the top of the floating assembly, the two spin-lock pliers arms are rotatably installed on the spin-lock bracket, the opening and closing drive is installed on one end of the two spin-lock pliers arms, and the two spin-lock mechanisms are respectively installed on the other end of the two spin-lock pliers arms; the opening and closing drive can drive the two spin-lock pliers arms to rotate in a horizontal plane, driving the two spin-lock mechanisms to clamp or release the pipe; the two spin-lock mechanisms can drive the pipe to rotate to achieve threading or detaching.

[0010] Optionally, a rotatable connecting rod is arranged between the turn-in mechanism and the turn-in bracket, and its rotation axis is vertically oriented; the turn-in bracket, the turn-in clamp arm, the turn-in mechanism and the connecting rod form a parallelogram structure; the four vertices of the parallelogram are respectively the installation point of the connecting rod on the turn-in bracket, the connection point of the connecting rod on the turn-in mechanism, the center point of the turn-in mechanism and the installation point of the turn-in clamp arm on the turn-in bracket.

[0011] Optionally, the screw-on mechanism includes a mounting seat, a screw-on drive assembly and two screw-on rollers; the mounting seat is arranged at the other end of the screw-on clamp arm, and the screw-on drive assembly is arranged on the mounting seat; the two screw-on rollers are rotatably mounted side by side on the screw-on bracket, and their rotation axes are vertically oriented; the screw-on drive assembly is connected to the screw-on rollers to drive the screw-on rollers to rotate; after the four screw-on rollers of the two screw-on mechanisms clamp the pipe, the screw-on drive assembly drives the screw-on rollers to rotate to drive the pipe to rotate for screwing on or off.

[0012] Optionally, the spindle drive assembly includes a variable drive and a planetary reducer; the planetary reducer is mounted on a mounting frame, the variable drive is arranged on the planetary reducer, and the planetary reducer is transmission-connected to the two spindle rollers.

[0013] Optionally, the spin-on roller includes an inner roller and a plurality of outer bushings; the plurality of outer bushings are evenly arranged along the axial direction of the inner roller; and the hardness of the outer bushings is lower than the hardness of the inner roller.

[0014] Optionally, the floating assembly includes a floating base, a track bracket, a spring guide rod and a floating spring; the track bracket can be slidably installed on the floating base, the floating base can be movably installed on the top of the C-frame, the spring guide rod is vertically arranged on the floating base, and the track bracket can be slidably connected to the spring guide rail; the floating spring is sleeved on the spring guide rail and is located between the floating base and the track bracket.

[0015] Optionally, composite rollers are provided on both sides of the floating base; a slide groove extending in the front-rear direction is provided on the top of the C-shaped frame; and the floating base is movably supported in the slide groove by the composite rollers.

[0016] Optionally, the centering clamp assembly includes a centering bracket, two centering clamp arms, a centering drive, a sliding seat and two centering connecting rods; the centering bracket is installed on the C-shaped frame, the centering clamp arms are rotatably installed on the centering bracket, the sliding seat is slidably installed on the centering bracket, the sliding seat is rotatably connected to the two centering clamp arms through two centering connecting rods, the centering drive is installed on the centering bracket, the centering drive is connected to the sliding seat to drive the sliding seat to slide back and forth, and the sliding of the sliding seat is converted into rotation of the centering clamp arms through the centering connecting rods.

[0017] Optionally, a positioning rod which can slide forward and backward is also provided on the centering bracket, and one end of the positioning rod is connected to the sliding seat; when clamping the pipe, the centering driver drives the sliding seat to drive the positioning rod to slide close to and abut against the outer surface of the pipe.

[0018] (III) Beneficial effects

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides an integrated drilling and repairing iron roughneck, in which a floating assembly drives a screw-down clamp assembly to float up and down, effectively compensating for the vertical displacement of the pipe when screwing, thereby reducing the risk of damage to the pipe thread and improving the sealing integrity and structural stability of the pipe connection. The screw-down clamp assembly is movably mounted on the top of a C-frame through a floating assembly, and a punch clamp assembly and a centering clamp assembly are integrated in the C-frame. The C-frame is connected to the other end of the telescopic arm assembly. The overall structural layout is compact and occupies a small space. The lifting assembly and the telescopic arm assembly can flexibly adjust the posture to cope with various working positions, ensuring that each clamp assembly can accurately align the pipe, thereby improving adaptability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a schematic diagram of the overall structure of the drilling and repairing integrated iron roughneck of Example 1 of the present invention;

[0022] Figure 2 1 is a schematic diagram of the overall structure of the spinner assembly according to Embodiment 1 of the present invention;

[0023] Figure 3 is a top view of the spinner pliers assembly according to embodiment 1 of the present invention;

[0024] Figure 4 is a schematic structural diagram of a turn-button mechanism according to Embodiment 1 of the present invention;

[0025] Figure 5 is a schematic cross-sectional view of a spinner assembly according to Embodiment 1 of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the centering clamp assembly of Example 1 of the present invention.

[0027] [Description of Reference Numerals]

[0028] 1: Spin-lock pliers assembly; 11: Spin-lock bracket; 12: Spin-lock pliers arm; 13: Opening and closing driver; 14: Connecting rod; 15: Mounting seat; 16: Spin-lock roller; 161: Inner roller; 162: Outer bushing; 17: Variable driver; 18: Planetary reducer;

[0029] 2: floating assembly; 21: floating base; 22: track bracket; 23: spring guide rod; 24: floating spring; 25: composite roller;

[0030] 3: C-frame;

[0031] 4: Punch and buckle pliers assembly;

[0032] 5: centering clamp assembly; 51: centering bracket; 52: centering clamp arm; 53: centering driver; 54: sliding seat; 55: centering connecting rod; 56: positioning rod;

[0033] 6: Telescopic arm assembly;

[0034] 7: Lifting pulley;

[0035] 8: Pillar. DETAILED DESCRIPTION

[0036] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0037] Embodiment 1:

[0038] like Figure 1 As shown, a specific embodiment of the present invention provides an integrated drilling and repairing iron roughneck, comprising a screwdriver assembly 1, a floating assembly 2, a C-frame 3, a punching clamp assembly 4, a centering clamp assembly 5, a telescopic arm assembly 6, a lifting pulley 7 and a column 8; the screwdriver assembly 1 is movably mounted on the top of the C-frame 3 through the floating assembly 2, the punching clamp assembly 4 and the centering clamp assembly 5 are arranged in the C-frame 3, and the punching clamp assembly 4 is located above the centering clamp assembly 5; one end of the telescopic arm assembly 6 is rotatably mounted on the lifting pulley 7, and its rotation axis is oriented horizontally, and the C-frame 3 is rotatably mounted on the other end of the telescopic arm assembly 6, and its rotation axis is oriented horizontally; the lifting pulley 7 is movably mounted on the column 8 up and down; the floating assembly 2 can drive the screwdriver assembly 1 to float up and down, so as to compensate for the displacement of the pipe in the vertical direction when the screwdriver assembly 1 is screwed.

[0039] Specifically, the floating assembly 2 drives the screw-on clamp assembly 1 to float up and down, effectively compensating for the vertical displacement of the pipe when the screw-on is performed, thereby reducing the risk of damage to the pipe thread and improving the sealing integrity and structural stability of the pipe connection. The screw-on clamp assembly 1 is movably mounted on the top of the C-frame 3 through the floating assembly 2, the punch clamp assembly 4 and the centering clamp assembly 5 are integrated in the C-frame, and the C-frame 3 is connected to the other end of the telescopic arm assembly 6. The overall structural layout is compact and occupies a small space. The lifting assembly and the telescopic arm assembly 6 can flexibly adjust the posture to cope with various working positions, ensuring that each clamp assembly can accurately align the pipe, improving adaptability and reliability.

[0040] Further, as shown in the figure, the turn-lock pliers assembly 1 includes a turn-lock bracket 11, two turn-lock pliers arms 12, an opening and closing driver 13 and two turn-lock mechanisms; the turn-lock bracket 11 is installed on the top of the floating assembly 2, the two turn-lock pliers arms 12 are rotatably installed on the turn-lock bracket 11, the opening and closing driver 13 is installed at one end of the two turn-lock pliers arms 12, and the two turn-lock mechanisms are respectively installed at the other ends of the two turn-lock pliers arms 12; the opening and closing driver 13 can drive the two turn-lock pliers arms 12 to rotate in a horizontal plane, driving the two turn-lock mechanisms to clamp or release the pipe; the two turn-lock mechanisms can drive the pipe to rotate to achieve make-up or make-off.

[0041] Furthermore, as shown in the figure, a rotatable connecting rod 14 is provided between the screw-in mechanism and the screw-in bracket 11, and its rotation axis is oriented vertically; the screw-in bracket 11, the screw-in clamp arm 12, the screw-in mechanism and the connecting rod 14 form a parallelogram structure; the four vertices of the parallelogram are respectively the installation point of the connecting rod 14 on the screw-in bracket 11, the connection point of the connecting rod 14 on the screw-in mechanism, the center point of the screw-in mechanism and the installation point of the screw-in clamp arm 12 on the screw-in bracket 11. The connecting rod 14 between the screw-in mechanism and the screw-in bracket 11 and the parallelogram structure formed thereby ensure the stability and accuracy of the screw-in process. When the pipe is screwed, no matter how the pipe size, material or wellhead environment changes, the structure always maintains the ideal posture and vertical pressure distribution of the screw-in mechanism relative to the pipe by virtue of its geometric characteristics.

[0042] Further, as shown in the figure, the screw mechanism includes a mounting seat 15, a screw drive assembly and two screw rollers 16; the mounting seat 15 is arranged at the other end of the screw clamp arm 12, and the screw drive assembly is arranged on the mounting seat 15; the two screw rollers 16 are rotatably mounted side by side on the screw bracket 11, and their rotation axes are oriented vertically; the screw drive assembly is connected to the screw rollers 16 to drive the screw rollers 16 to rotate; after the four screw rollers 16 of the two screw mechanisms clamp the pipe, the screw drive assembly drives the screw rollers 16 to rotate and drive the pipe to rotate for screwing or unscrewing. Among them, the screw drive assembly includes a variable driver 17 and a planetary reducer 18; the planetary reducer 18 is installed on the mounting frame, and the variable driver 17 is arranged on the planetary reducer 18, and the planetary reducer 18 is connected to the two screw rollers 16 in a transmission manner. The variable driver 17 in the screw drive assembly is combined with the planetary reducer 18 to form an efficient power transmission system. The variable drive 17 accurately controls the output torque and speed in real time according to the material, specification and working conditions of the pipe, and after the planetary reducer 18 reduces the speed and increases the torque, it is stably transmitted to the spindle roller 16. It can achieve stepless speed regulation. Under the condition of constant power, it can freely switch between high speed and low torque and low speed and high torque, thereby optimizing the working efficiency and power output.

[0043] Furthermore, in this embodiment, the spin roller 16 includes an inner roller 161 and a plurality of outer bushings 162; the plurality of outer bushings 162 are evenly arranged along the axial direction of the inner roller 161; the hardness of the outer bushing 162 is lower than that of the inner roller 161. The composite structure of the inner roller 161 and the outer bushing 162 of the spin roller 16 provides excellent contact protection for the pipe. The low hardness of the outer bushing 162 enables it to form a flexible contact interface with the pipe when spinning, which can effectively conform to the microscopic undulations and shape deviations of the pipe surface, evenly disperse the spin pressure, and avoid damage to the pipe caused by local stress concentration.

[0044] Further, as shown in the figure, the floating assembly 2 includes a floating base 21, a track bracket 22, a spring guide rod 23 and a floating spring 24; the track bracket 22 can be slidably installed on the floating base 21, the floating base 21 can be movably installed on the top of the C-shaped frame 3, the spring guide rod 23 is vertically arranged on the floating base 21, and the track bracket 22 is slidably connected to the spring guide rail; the floating spring 24 is sleeved on the spring guide rail and is located between the floating base 21 and the track bracket 22. The unique design of the floating assembly 2 provides the key vertical displacement compensation capability for the screw-on pliers assembly 1. The sliding connection between the track bracket 22 and the floating base 21 cooperates with the spring guide rod 23 and the floating spring 24 to form a sensitive elastic support system. When the pipe is vertically displaced during the spinning process due to thread screwing force, changes in downhole working conditions or vibration of wellhead equipment, the track bracket 22 slides smoothly on the floating base 21 under the guidance of the spring guide rod 23, and the floating spring 24 expands and contracts in real time according to the displacement, accurately compensating for the displacement change, ensuring that the spinning tongs assembly 1 and the pipe are always in ideal contact with each other.

[0045] Furthermore, in this embodiment, composite rollers 25 are provided on both sides of the floating base 21; a slide groove extending in the front-to-back direction is provided on the top of the C-frame 3; and the floating base 21 is movably supported in the slide groove by the composite rollers 25. The cooperation between the composite rollers 25 on both sides of the floating base 21 and the slide groove on the top of the C-frame enables the smooth movement of the equipment in the horizontal direction. In this embodiment, the composite rollers 25 are made of special materials and precision manufacturing processes, and have a low rolling friction coefficient and high wear resistance. When bearing the weight of the equipment and the operating force, it ensures that the floating base 21 can quickly and smoothly respond to the horizontal position change requirements of the pipe.

[0046] Further, as shown in the figure, the centering clamp assembly 5 includes a centering bracket 51, two centering clamp arms 52, a centering driver 53, a sliding seat 54 and two centering connecting rods 55; the centering bracket 51 is installed on the C-shaped frame 3, the centering clamp arm 52 is rotatably installed on the centering bracket 51, the sliding seat 54 is slidably installed on the centering bracket 51, the sliding seat 54 is rotatably connected to the two centering clamp arms 52 through two centering connecting rods 55, the centering driver 53 is installed on the centering bracket 51, and the centering driver 53 is connected to the sliding seat 54 to drive the sliding seat 54 to slide back and forth, and the sliding of the sliding seat 54 is converted into the rotation of the centering clamp arm 52 through the centering connecting rod 55. The centering clamp arm 52 is rotatably installed on the centering bracket 51, and is linked with the sliding seat 54 through the centering connecting rod 55 to form a stable clamping structure. When clamping pipes, it can adapt to the mechanical requirements of pipes of different diameters and shapes and provide uniform and stable clamping force. Specifically, in this embodiment, a positioning rod 56 that can slide forward and backward is also provided on the centering bracket 51, and one end of the positioning rod 56 is connected to the sliding seat 54; when clamping the pipe, the centering driver 53 drives the sliding seat 54 to drive the positioning rod 56 to slide close to and abut against the outer surface of the pipe. When the centering driver 53 drives the sliding seat 54 to move, the positioning rod 56 slides along with it and closely abuts against the outer surface of the pipe, providing a precise positioning reference for the clamp.

[0047] The use of the integrated drilling and repairing iron roughneck provided in this embodiment is as follows: when screwing, the C-frame 3 is moved to the working position through the lifting pulley 7 and the telescopic arm assembly 6, the sliding seat 54 is driven to slide forward through the centering driver 53, and the two centering clamp arms 52 are driven to rotate and clamp the pipe through the centering connecting rod 55, and the positioning rod 56 ensures the centering accuracy of the pipe, and the upper and lower pipes are screwed together, and then the two screwing clamp arms 12 are driven to rotate in the horizontal plane through the opening and closing driver 13, and the two screwing mechanisms are driven to approach the pipe, and the four screwing rollers 16 of the two screwing mechanisms clamp the pipe located above; at this time, the centering driver 53 drives the sliding seat 54 to slide backward, and the two centering clamp arms 52 are driven to rotate and release the pipe through the centering connecting rod 55; at the same time, the pipe located below is clamped by the punching clamp; and then the variable driver 17 outputs power according to the preset torque and speed parameters, and drives the screwing roller 16 to rotate after the planetary reducer 18 reduces speed and increases torque, so as to drive the pipe to rotate and perform the screwing operation. During the screwing process, the floating spring 24 and the track bracket 22 of the floating assembly 2 perform adaptive compensation in real time according to the displacement change of the pipe in the vertical direction, ensuring that the screwing roller 16 always maintains good contact with the pipe.

[0048] Embodiment 2:

[0049] This embodiment provides a drilling and repairing integrated iron roughneck, which includes all the structures of the drilling and repairing integrated iron roughneck in Embodiment 1. Further, in this embodiment, the telescopic arm assembly 6 includes a clamp arm, a rear arm, a connecting piece and a telescopic drive; one end of the rear arm is rotatably mounted on the lifting slide, the other end of the rear arm is rotatably connected to the connecting piece, one end of the forearm is rotatably connected to the connecting arm, and the C-frame 3 is rotatably mounted on the other end of the forearm. The telescopic drive is mounted on the lifting slide, and the driving end of the telescopic drive is connected to the forearm to drive the forearm and the rear arm to rotate in a vertical plane to achieve extension and contraction.

[0050] Furthermore, the column 8 includes a support column, a rotary drive mechanism and a rotating column; the support column can be supported on the drilling platform, the rotating column is installed on the support column through the rotary drive mechanism, the lifting pulley 7 can be installed on the rotating column so as to move up and down, the rotary drive mechanism can drive the rotating column to rotate, and drive the telescopic arm assembly 6 to rotate in the horizontal plane through the lifting pulley.

[0051] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0054] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0055] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An integrated drilling and repairing iron roughneck, characterized in that: It comprises a screw clamp assembly (1), a floating assembly (2), a C-shaped frame (3), a punch clamp assembly (4), a centering clamp assembly (5), a telescopic arm assembly (6), a lifting pulley (7) and a column (8); The screw clamp assembly (1) is movably mounted on the top of the C-shaped frame (3) through the floating assembly (2); the punch clamp assembly (4) and the centering clamp assembly (5) are arranged in the C-shaped frame (3); the punch clamp assembly (4) is located above the centering clamp assembly (5); one end of the telescopic arm assembly (6) is rotatably mounted on the lifting pulley (7), and its rotation axis is oriented horizontally; the C-shaped frame (3) is rotatably mounted on the other end of the telescopic arm assembly (6), and its rotation axis is oriented horizontally; the lifting pulley (7) is movably mounted on the column (8); The floating assembly (2) can drive the spinner assembly (1) to float up and down, so as to compensate for the displacement of the pipe in the vertical direction when the spinner assembly (1) is spinning.

2. The drilling and repairing integrated iron roughneck as claimed in claim 1, characterized in that: The twist-on pliers assembly (1) comprises a twist-on bracket (11), two twist-on pliers arms (12), an opening and closing driver (13) and two twist-on mechanisms; The screw-on bracket (11) is mounted on the top of the floating assembly (2); two screw-on clamp arms (12) are rotatably mounted on the screw-on bracket (11); an opening and closing driver (13) is mounted on one end of the two screw-on clamp arms (12); and two screw-on mechanisms are respectively mounted on the other end of the two screw-on clamp arms (12); the opening and closing driver (13) can drive the two screw-on clamp arms (12) to rotate in a horizontal plane, thereby driving the two screw-on mechanisms to clamp or release the pipe; and the two screw-on mechanisms can drive the pipe to rotate to realize screwing or unscrewing.

3. The integrated drilling and repairing iron roughneck as claimed in claim 2, characterized in that: A rotatable connecting rod (14) is arranged between the turn-lock mechanism and the turn-lock bracket (11), and its rotation axis is oriented vertically; The turnbuckle bracket (11), the turnbuckle clamp arm (12), the turnbuckle mechanism and the connecting rod (14) form a parallelogram structure; The four vertices of the parallelogram are respectively the installation point of the connecting rod (14) on the turn-lock bracket (11), the connection point of the connecting rod (14) on the turn-lock mechanism, the center point of the turn-lock mechanism and the installation point of the turn-lock clamp arm (12) on the turn-lock bracket (11).

4. The integrated drilling and repairing iron roughneck as claimed in claim 2, characterized in that: The turn-lock mechanism comprises a mounting seat (15), a turn-lock driving assembly and two turn-lock rollers (16); A mounting seat (15) is arranged at the other end of the turn-lock clamp arm (12), and a turn-lock driving assembly is arranged on the mounting seat (15); two turn-lock rollers (16) are rotatably mounted side by side on the turn-lock bracket (11), and their rotation axes are oriented vertically; the turn-lock driving assembly is connected to the turn-lock rollers (16) to drive the turn-lock rollers (16) to rotate; After the four screw-in rollers (16) of the two screw-in mechanisms clamp the pipe, the screw-in driving assembly drives the screw-in rollers (16) to rotate, thereby driving the pipe to rotate for screwing on or screwing off.

5. The integrated drilling and repairing iron roughneck as claimed in claim 4, characterized in that: The spindle drive assembly includes a variable drive (17) and a planetary reducer (18); The planetary reducer (18) is mounted on a mounting frame, the variable drive (17) is arranged on the planetary reducer (18), and the planetary reducer (18) is transmission-connected to the two spin buckle rollers (16).

6. The drilling and repairing integrated iron roughneck as claimed in claim 4, characterized in that: The spin-on roller (16) comprises an inner roller (161) and a plurality of outer bushings (162); A plurality of outer bushings (162) are evenly arranged along the axial direction of the inner roller (161); The hardness of the outer bushing (162) is lower than the hardness of the inner roller (161).

7. The drilling and repairing integrated iron roughneck as claimed in claim 1, characterized in that: The floating assembly (2) comprises a floating base (21), a track bracket (22), a spring guide rod (23) and a floating spring (24); The track bracket (22) can be slidably mounted on the floating base (21) up and down, the floating base (21) can be movably mounted on the top of the C-shaped frame (3), the spring guide rod (23) is vertically arranged on the floating base (21), and the track bracket (22) can be slidably connected to the spring guide rail; the floating spring (24) is sleeved on the spring guide rail and is located between the floating base (21) and the track bracket (22).

8. The drilling and repairing integrated iron roughneck as claimed in claim 7, characterized in that: Composite rollers (25) are arranged on both sides of the floating base (21); a slide groove extending in the front-rear direction is arranged on the top of the C-shaped frame (3); The floating base (21) is movably supported in the slide groove via a composite roller (25).

9. The drilling and repairing integrated iron roughneck as claimed in claim 1, characterized in that: The centering clamp assembly (5) comprises a centering bracket (51), two centering clamp arms (52), a centering driver (53), a sliding seat (54) and two centering connecting rods (55); A centering bracket (51) is mounted on a C-shaped bracket (3), a centering clamp arm (52) is rotatably mounted on the centering bracket (51), a sliding seat (54) is slidably mounted on the centering bracket (51), the sliding seat (54) is rotatably connected to the two centering clamp arms (52) through two centering connecting rods (55), a centering driver (53) is mounted on the centering bracket (51), the centering driver (53) is connected to the sliding seat (54) to drive the sliding seat (54) to slide forward and backward, and the sliding of the sliding seat (54) is converted into the rotation of the centering clamp arm (52) through the centering connecting rod (55).

10. The drilling and repairing integrated iron roughneck as claimed in claim 9, characterized in that: The centering bracket (51) is also provided with a positioning rod (56) which can slide forward and backward, and one end of the positioning rod (56) is connected to the sliding seat (54); When clamping the pipe, the centering driver (53) drives the sliding seat (54) to drive the positioning rod (56) to slide close to and abut against the outer surface of the pipe.

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