Under-pressure operation machine with coiled tubing injection head mode

Abstract

The invention discloses an under-pressure operation machine with a coiled tubing injection head mode, and relates to the technical field of petroleum machinery, the under-pressure operation machine comprises an injection head and a hydraulic catwalk, the hydraulic catwalk is located on one side of the injection head, an injection module and a guide cone are installed in the injection head, and the guide cone is located above the injection module; the hydraulic catwalk is provided with a conveying rail used for containing a pipe column, a first mechanical arm used for placing the pipe column on the conveying rail and a mast obliquely extending towards the upper end of the injection head, the mast is provided with a second mechanical arm capable of sliding in the axis direction of the mast, and the first mechanical arm and the second mechanical arm are each provided with a hydraulic elevator. The hydraulic elevator can grab the tubular column placed on the conveying rail. The device not only has the functions of a conventional under-pressure operation machine, but also has most of the advantages of the coiled tubing, so that the advantages of coiled tubing operation and under-pressure operation are perfectly combined.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petroleum machinery, in particular to a snubbing unit with a coiled tubing injector head mode. BACKGROUND

[0002] Coiled tubing operations are used to perform various tasks such as sand washing, acidizing, wax removal, cementing, gas lifting, fishing, drilling cement plugs, low-velocity fracturing, and pipeline cleaning in onshore and offshore oil and gas wells. Snubbing is an advanced downhole operation that allows the pipe string to be lowered or raised without pressure relief or well control. Currently, both coiled tubing operations and snubbing play a crucial role in oil and gas field development.

[0003] Advantages of coiled tubing operations: 1. High efficiency: Coiled tubing operation equipment is small and lightweight, allowing for quick lowering or raising, reducing operation time; 2. Flexibility: Suitable for various operations such as drilling, well repair, and fracturing; 3. Reduced environmental pollution: Reduces the discharge of drilling fluid and rock debris, with less impact on the environment; 4. Small space occupation: Coiled tubing operation equipment is relatively compact, suitable for space-limited sites. Disadvantages of coiled tubing operations: 1. Cost: Although the operation is efficient, the rental and operation costs of coiled tubing are high; 2. Technical challenges: Requires a professional operation team and technical support, with a high technical threshold; 3. Durability: Coiled tubing may experience fatigue and damage in complex or high-wear environments.

[0004] Advantages of remote snubbing: 1. Improved safety: Remote operation eliminates the risk of personnel working under high pressure, allowing for faster pressure control and reducing the risk of blowouts during traditional well repair and completion, improving the safety of the operation; 2. Protecting the reservoir: Reduces the invasion of formation fluids, helping to protect the reservoir and improve oil and gas well productivity; 3. Environmentally friendly: Reduces ground emissions, with less impact on the environment; 4. Improved operation efficiency: Reduces non-production time due to well control issues, improving operation efficiency; 5. High power: Snubbing unit equipment can perform many high-power operations compared to coiled tubing. Disadvantages of snubbing: 1. Higher cost: Requires multiple large and heavy equipment, complex operation, and requires special equipment and well-trained operators, resulting in high initial investment and maintenance costs; 2. Technical complexity: Requires high skills from operators, precise pressure control and monitoring; 3. Adaptability: Not suitable for all types of oil and gas wells, especially those with complex geological conditions or unstable pressure formations, and is also wasteful when used in shallow wells; 4. Flexibility: Compared to coiled tubing equipment, snubbing equipment is large and heavy, slow and inflexible.

[0005] After comparison, in terms of safety and environmental protection: the underbalanced drilling technology has advantages in safety and environmental protection because it reduces the risk of blowout and ground emissions; in terms of cost and efficiency: the coiled tubing technology has a significant advantage in operation efficiency, but its operating cost may be higher, and the underbalanced drilling technology can improve operation efficiency, but has a large initial investment; in terms of technology and operation: both technologies require high-level technical knowledge and professional operation team, and the underbalanced drilling technology may require more precise pressure control, while the coiled tubing technology requires a professional technical team capable of handling coiled tubing equipment.

[0006] Therefore, there is an urgent need for an underbalanced drilling machine with the functions of a conventional underbalanced drilling machine and most of the advantages of a coiled tubing. SUMMARY

[0007] The purpose of the present application is to provide an underbalanced drilling machine with a coiled tubing injector mode, which not only has the functions of a conventional underbalanced drilling machine, but also has most of the advantages of a coiled tubing, perfectly combining the advantages of coiled tubing operation and underbalanced drilling.

[0008] To achieve the purpose of the present application, the technical solution adopted is: an underbalanced drilling machine with a coiled tubing injector mode, comprising an injector, a hydraulic catwalk located on one side of the injector, an injection module and a guide cone installed in the injector, and the guide cone located above the injection module; a transport track for placing a pipe string, a mechanical hand one for placing the pipe string onto the transport track, and a mast extending obliquely to the upper end of the injector are installed on the hydraulic catwalk, the mast is installed with a mechanical hand two which can slide along the axis of the mast, and hydraulic hangers are installed on the mechanical hand one and the mechanical hand two, which can grab the pipe string placed on the transport track.

[0009] Further, the injection module comprises a plurality of chain guides extending along the axis of the injector, the plurality of chain guides are arranged circumferentially and spaced apart along the center of the injector, and the plurality of chain guides can collectively grip and transport the pipe string.

[0010] Further, the chain guide comprises a chain plate type conveying mechanism installed on the injector, an elastic assembly is installed on the conveying plate in the chain plate type conveying mechanism, and a slip is installed on the elastic assembly.

[0011] Further, the elastic assembly comprises an outer sleeve installed on the conveying plate in the chain plate type conveying mechanism and an inner sleeve installed on the slip, the inner sleeve and the outer sleeve are slidingly inserted and connected; a spring is further installed between the conveying plate and the slip, and the spring is located in the inner sleeve.

[0012] Further, the insertion end of the inner sleeve further has a limiting protruding ring protruding outward, and the insertion end of the outer sleeve further has a flange matched with the protruding ring.

[0013] Further, the conveying plate and the slip are both provided with a limiting post, and both ends of the spring are sleeved on the limiting post.

[0014] Further, the hydraulic catwalk is further provided with a hydraulic trolley, the hydraulic trolley corresponds to the rear end of the transportation track, and the hydraulic trolley can move along the axis direction of the transportation track.

[0015] Further, the hydraulic catwalk is further provided with a winch for pulling the second mechanical hand.

[0016] The beneficial effects of the present application are:

[0017] 1. Compared with the traditional snubbing unit, the personnel is avoided to work above the high pressure, the drilling speed is faster and the efficiency is higher without increasing the cost.

[0018] 2. The pipe column can be gripped and conveyed downward by the plurality of chain guide rails, the safety is higher, and the pipe column is avoided to drop into the well or to be sprayed out.

[0019] 3. The elastic assembly is installed between the conveying plate and the slip in the chain plate type conveying mechanism, the injection head can convey some variable diameter tools with small size change, the efficiency is higher, the defects that the traditional slip can only convey one size tool and needs to adjust the coupling are overcome, and the pipe column is always gripped by the slip when conveyed downward through the chain guide rail, so that the operation process is safer.

[0020] 4. The present application has an intelligent monitoring system and a big data processing system, so that more accurate prompts and guidance are provided for the operation, and the mistakes are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings illustrate exemplary embodiments of the present application and together with the general description given above and the detailed description given below, serve to explain the principles of the application. These drawings are included herewith and constitute a part of this specification.

[0022] Figure 1 is a structural schematic view of the snubbing unit with the coiled tubing injection head mode provided by the present application;

[0023] Figure 2 is an installation schematic view of the slip.

[0024] Markings in the drawings and corresponding names of parts:

[0025] 1, injection head, 2, hydraulic catwalk, 3, chain guide rail, 4, guide cone, 5, transport track, 6, mast, 7, manipulator 1, 8, hydraulic lifting clamp, 9, hydraulic trolley, 10, winch, 11, lifting mechanism; 12, manipulator 2, 13, control room;

[0026] 31, rotating shaft, 32, sprocket, 33, chain, 34, conveying plate, 35, outer sleeve, 36, inner sleeve, 317, spring, 38, limiting column, 39, slip;

[0027] 351, flange;

[0028] 361, limiting convex ring. DETAILED DESCRIPTION

[0029] The application will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related content, and are not a limitation on the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0030] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0031] As shown in Figure 1 , Figure 2 , the application provides a snubbing unit with a coiled tubing injection head mode, which comprises an injection head 1 and a hydraulic catwalk 2. The injection head 1 is vertically installed on a work rotary table, and the hydraulic catwalk 2 is directly used as an existing hydraulic catwalk 2. The hydraulic catwalk 2 is arranged on one side of the injection head 1. An injection module and a guide cone 4 are installed in the injection head 1. The guide cone 4 is located above the injection module, and the guide cone 4 is funnel-shaped. The guide cone 4 is used to guide the centering of the pipe string, and the inner surface of the guide cone 4 has a nano material coating to reduce the frictional resistance when the pipe string passes through the guide cone 4. The injection module is used to tightly hold the pipe string and convey it downward.

[0032] A transport track 5 for placing the pipe string is installed on the hydraulic catwalk 2. A mast 6 is also installed on the hydraulic catwalk 2 and is in butt joint with the upper end of the injection head 1. The lower end of the mast 6 is located on one side of the transport track 5. The included angle between the mast 6 and the transport track 5 can be adjusted according to actual conditions. The hydraulic catwalk 2 also has pipe racks (not shown in the figure) on both sides, which are used for temporary storage of the pipe string. A manipulator 1 7 is also installed on the hydraulic catwalk 2. A hydraulic lifting clamp 8 is also installed on the manipulator 1 7. The hydraulic lifting clamp 8 on the manipulator 1 7 is used to grab the pipe string on the pipe rack and place it on the transport track 5.

[0033] In the present application, the outside of the injection head 1 is arranged with a derrick (not shown in the figure), and the upper end of the mast 6 is installed on the derrick; the upper end of the mast 6 is also installed with the manipulator 12, which can reciprocate along the axial direction of the mast 6, that is, the manipulator 12 can move towards the injection head 1, and the manipulator 12 can also move towards the transport track 5.

[0034] The manipulator 12 is also installed with the hydraulic lifting clamp 8, which can clamp the pipe string by opening and closing, and through the cooperation of the hydraulic lifting clamp 8 and the manipulator 12, the hydraulic lifting clamp 8 can directly grab the pipe string placed on the transport track 5.

[0035] The front end of the transport track 5 is also provided with a lifting mechanism 11, which is located in front of the end of the transport track 5 close to the mast 6, and has a certain distance between the lifting mechanism 11 and the lower end of the mast 6, for example, the distance between the lifting mechanism 11 and the lower end of the mast 6 is 0.5m-1.2m. The lifting mechanism 11 comprises a lifting assembly and a fixed plate, the lifting assembly is located on the hydraulic catwalk 2, and the fixed plate is fixedly installed on the output end of the lifting assembly, and the surface of the fixed plate is matched with the conveying surface of the transport track 5; when the lifting assembly does not lift the fixed plate, the surface of the fixed plate is flush with the surface of the transport track 5, at this time, the fixed plate and the transport track 5 form a complete conveying surface together; when the lifting assembly lifts the fixed plate, the fixed plate is higher than the transport track 5.

[0036] By arranging the lifting mechanism 11, after the manipulator 1 places the pipe string on the transport track, the transport track 5 can convey the pipe string to move forward, so that the pipe string is located on the lifting mechanism and the transport track 5 together; when the manipulator 12 needs to grab the pipe string, the lifting assembly pushes the fixed plate to move upward, and at the same time the fixed plate moves upward, the end of the pipe string close to the mast 6 is lifted, at this time the manipulator 12 can quickly grab the pipe string, so that the grabbing of the manipulator 12 is more rapid and convenient.

[0037] In the present application, in order to ensure the clamping and conveying of the pipe string by the injection module, the injection module comprises a chain guide rail 3, that is, the chain guide rail 3 is vertically arranged, and the chain guide rail 3 extends along the axial direction of the injection head 1; at the same time, the chain guide rail 3 is a plurality of chain guide rails 3, which are uniformly and spacedly arranged along the center of the injection head 1. Through the cooperation of the plurality of chain guide rails 3, when the pipe string passes through the center of the plurality of chain guide rails 3, the plurality of chain guide rails 3 can not only tightly hold the pipe string, but also convey the pipe string.

[0038] The chain guide rail 3 comprises a chain plate conveying mechanism installed in the injection head 1, which is directly used from the conveying structure of the existing chain plate conveyor. Specifically, the chain plate conveying mechanism comprises at least two rotating shafts 31 rotatably installed on the injection head 1, at least two sprockets 32 are installed on each of the two rotating shafts 31, and the two sprockets 32 corresponding to each other on the two rotating shafts 31 are jointly provided with a chain 33, and the adjacent two chains 33 are connected with conveying plates 34, and the adjacent two conveying plates 34 are hingedly connected, so that the adjacent two conveying plates 34 can relatively rotate, and the chain plate conveying belt is formed by the cooperation of the plurality of conveying plates 34.

[0039] In the present application, in order to ensure the normal operation of the chain plate conveying mechanism, each chain plate conveying mechanism is provided with a driving motor for driving one of the rotating shafts 31 in the chain plate conveying mechanism to rotate, the driving motor is fixed on the injection head 1, and the output end of the driving motor is connected with the rotating shaft 31 through a flange or a shaft coupling or the like.

[0040] The conveying surface of each conveying plate 34 is provided with an elastic assembly, and the elastic assembly is provided with a slip bowl 39. When the slip bowl 39 is subjected to a force acting on the conveying plate 34, the force acting on the slip bowl 39 will be transmitted to the elastic assembly, so that the elastic assembly is compressed; when the slip bowl 39 loses the force acting on the conveying plate 34, the elastic assembly can push the slip bowl 39 back to its original position by its own elastic force. In the present application, the gripping surface of the slip bowl 39 for gripping the pipe string is an arc surface, and the gripping surface of the slip bowl 39 has anti-slip teeth to prevent the slip bowl 39 from slipping when gripping the pipe string due to excessive gravity of the pipe string.

[0041] In the present application, the elastic assembly comprises an outer sleeve 35 and an inner sleeve 36, the outer sleeve 35 is welded and fixed on the conveying plate 34, the inner sleeve 36 is welded and fixed on the back of the slip bowl 39, the center axis of the inner sleeve 36 is on the same straight line as the center axis of the outer sleeve 35, and the inner sleeve 36 is inserted and matched with the outer sleeve 35; at the same time, a spring 317 is also installed between the conveying plate 34 and the slip bowl 39, and the spring 317 is jointly covered by the inner sleeve 36 and the outer sleeve 35. By jointly covering the spring 317 with the inner sleeve 36 and the outer sleeve 35, not only can the spring 317 be prevented from being exposed, but also the spring 317 can be prevented from being inclined due to uneven force, thereby preventing the slip bowl 39 from being inclined and ensuring the subsequent gripping of the slip bowl 39 to the pipe string.

[0042] In order to prevent the inner sleeve 36 and the outer sleeve 35 from being separated, the insertion end of the inner sleeve 36 further has a limiting convex ring 361 protruding outward in the radial direction thereof, the large diameter of the limiting convex ring 361 is larger than the outer diameter of the inner sleeve 36, and the large diameter of the limiting convex ring 361 is gap-fitted with the inner diameter of the outer sleeve 35; at the same time, the insertion end of the outer sleeve 35 further has a flange 351 protruding inward in the radial direction thereof, and the small diameter of the flange 351 is smaller than the outer diameter of the inner sleeve 36 for gap-fitting.

[0043] In order to facilitate the installation of the spring 317, the limiting column 38 is fixed on the conveying plate 34 and the slip 39, specifically, the limiting column 38 on the conveying plate 34 is located in the outer sleeve 35 and is in the same straight line with the central axis of the outer sleeve 35, and the limiting column 38 on the slip 39 is located in the inner sleeve 36 and is in the same straight line with the central axis of the inner sleeve 36. When the spring 317 is installed, the two ends of the spring 317 are sleeved on the two limiting columns 38, which not only prevents the end of the spring 317 from being separated from the conveying plate 34 and the slip 39, but also makes the installation and disassembly of the spring 317 more convenient.

[0044] The hydraulic catwalk 2 is also provided with a hydraulic trolley 9, which is located at the end of the transportation track 5 away from the mast 6, and the central axis of the hydraulic trolley 9 is in the same straight line with the central axis of the transportation track 5, and the hydraulic trolley 9 can be close to or away from the transportation track 5, so that when the pipe column is located on the transportation track 5, the pipe column is pushed forward by the gradual approach of the hydraulic trolley.

[0045] In the present application, the support surface for supporting the pipe column on the transportation track 5 is an arc surface, specifically, the cross section of the support surface for supporting the pipe column on the transportation track 5 is a circular arc, when the pipe column is placed on the support surface of the transportation track 5, the central axis of the pipe column is in the same vertical plane with the central axis of the support surface on the transportation track 5, so as to facilitate the guidance of the pipe column to the fixed position.

[0046] In the present application, in order to prevent the pipe column from rolling out from both sides of the transportation track 5 after entering the transportation track 5, a limiting guardrail can also be installed on both sides of the transportation track 5, and the hydraulic guardrail can be turned over on the hydraulic catwalk 2, that is, when the pipe column needs to be transported to the support surface of the transportation track 5, the limiting guardrail on one side of the transportation track 5 can be turned over to lie flat on the hydraulic catwalk 2, and when the pipe column enters the support surface of the transportation track 5, the limiting guardrails on both sides of the transportation track 5 are turned over to be perpendicular to the hydraulic catwalk 2. In the present application, the turning over of the limiting guardrail can be directly driven by a motor or a hydraulic rod. When the motor is used to drive the limiting guardrail to turn over, the output shaft of the motor is connected with the turning shaft 31 of the limiting guardrail. When the hydraulic rod is used to drive the limiting guardrail to turn over, one end of the hydraulic rod is hinged to the hydraulic catwalk 2, and the other end of the hydraulic rod is hinged to the limiting guardrail, so that the hydraulic rod, the limiting guardrail and the surface of the hydraulic catwalk 2 form a triangular structure.

[0047] In the application, in order to ensure the up and down movement of the manipulator two 12 along the mast 6, the mast 6 is provided with a guide rail, the manipulator two 12 is provided with a sliding block matched with the guide rail, and the cooperation of the guide rail and the sliding block enables the manipulator two 12 to move along the mast smoothly; meanwhile, the hydraulic catwalk 2 is also provided with a winch 10, the steel wire on the winch 10 is connected with the manipulator two 12, and the movement of the winch 10 enables the manipulator two 12 to move along the mast 6 reciprocally.

[0048] In the application, in order to ensure the traction of the manipulator two 12, the mast 6 is also provided with a wire wheel for guiding the steel wire on the winch 10; in order to make the movement of the manipulator two 12 more stable, the side of the manipulator two 12 close to the upper end of the mast 6 and the side of the manipulator two 12 close to the lower end of the mast 6 are both connected with the steel wire, and the steel wires on the two sides of the mast 6 are wound on the winch 10 in opposite directions, so that the manipulator two 12 is always pulled by the steel wire during the reciprocating movement, and the movement of the manipulator two 12 along the mast 6 is more stable. In the application, the size of the winch 10 is small, and the length of the steel wire wound on the winch 10 is enough for 5 times of the whole lifting and lowering stroke.

[0049] In the application, in order to ensure the normal operation of the hydraulic catwalk 2, the manipulator one 7, the manipulator two 12, the hydraulic lifting clamp 8 and the hydraulic small trolley 9, the belt pressure working machine also comprises a hydraulic transmission system, which provides hydraulic power oil for the operation of the hydraulic catwalk 2, the manipulator one 7, the manipulator two 12, the hydraulic lifting clamp 8 and the hydraulic small trolley 9.

[0050] In the application, in order to facilitate the control of the hydraulic catwalk 2, the manipulator one 7, the manipulator two 12, the hydraulic lifting clamp 8, the hydraulic small trolley 9, the winch 10 and the injection module, the hydraulic catwalk 2 is also provided with a control room 13, the control room 13 is provided with a monitoring system and a big data intelligent processing system, the big data intelligent processing system is electrically connected with the monitoring system, and the monitoring system is electrically connected with the hydraulic catwalk 2, the manipulator one 7, the manipulator two 12, the hydraulic lifting clamp 8, the hydraulic small trolley 9, the winch 10 and the injection module. The control room 13 is also provided with a signal transmission system for transmitting signals to the monitoring system, and the big data intelligent processing system is also connected with an alarm system.

[0051] Compared with the traditional derrick upper manual operation system which is particularly dangerous, the control room is installed on the ground, remote operation is carried out in combination with a signal transmission system, an operator understands the real-time situation on the site in the control room through observation of a monitoring system, the intelligent monitoring system gives various intelligent prompts about the next operation for the operator to refer to after analyzing the on-site data through a big data intelligent processing system, the operator determines the next operation according to the reference scheme and relevant experience, and the operator transmits the instruction to the corresponding equipment through the signal transmission system through the operation of the operation system, and the equipment moves according to the instruction, which avoids putting the operator in danger; meanwhile, the big data processing system is connected with an alarm system, and once an emergency is found through big data prediction, the responding alarm and prompt are immediately sounded, and the operator takes emergency measures in a timely manner according to the situation.

[0052] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, the person skilled in the art can combine and combine the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples without contradiction.

[0053] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0054] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present application, and do not limit the scope of the present application. Other changes or modifications can be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present application.

Claims

1. A snubbing unit with a coiled tubing injector head mode, characterized by, The utility model provides an injection head (1), hydraulic catwalk (2), hydraulic catwalk (2) is located one side of injection head (1), and the injection module and guide cone (4) are installed in injection head (1), and guide cone (4) is located above injection module, the hydraulic catwalk (2) is installed the transport track (5) for placing the pipe column, the mechanical hand one (7) for placing the pipe column to transport track (5) and the mast (6) extending to the upper end of injection head (1) in the inclination, the mast (6) is installed the mechanical hand two (12) of the slidable along its axis direction, and the hydraulic hanger (8) is installed on mechanical hand one (7), mechanical hand two (12), and the hydraulic hanger (8) can be grabbed to the pipe column placed on transport track (5).

2. The snubbing unit with coiled tubing injector head mode of claim 1, wherein, The injection module includes a plurality of chain guides (3) extending along the axis of the injection head (1), a plurality of chain guides (3) are circumferentially spaced apart along the center of the injection head (1), and a plurality of chain guides (3) can collectively hold and transport the pipe column.

3. The snubbing unit with coiled tubing injector head mode of claim 2, wherein, The chain guide (3) includes a chain plate conveying mechanism mounted on the injection head (1), the conveying plate (34) in the chain plate conveying mechanism is provided with an elastic assembly, and the slip (39) is mounted on the elastic assembly.

4. The snubbing unit with coiled tubing injector head mode of claim 4, wherein, The elastic assembly includes an outer sleeve (35) mounted on the conveying plate (34) in the chain plate conveying mechanism and an inner sleeve (36) mounted on the slip (39), and the inner sleeve (36) and the outer sleeve (35) are slidingly inserted and connected.

5. The snubbing unit with coiled tubing injector head mode of claim 4, wherein, The insertion end of the inner sleeve (36) further has a limiting convex ring (361) protruding outward, and the insertion end of the outer sleeve (35) further has a flange (351) matched with the convex ring.

6. The coiled tubing injector head mode snubbing unit of claim 4 or 5, wherein, The conveying plate (34) and the slip (39) are both provided with a limiting column (38), and the both ends of the spring (317) are sleeved on the limiting column (38).

7. The managed pressure drilling machine with coiled tubing injector head mode of any of claims 1 to 6, wherein, The transport track (5) is further provided with a hydraulic trolley (9), the hydraulic trolley (9) corresponds to the rear end of the transport track (5), and the hydraulic trolley (9) can move along the axis of the transport track (5).

8. The managed pressure drilling machine with coiled tubing injector head mode of any of claims 1 to 6, wherein, The hydraulic catwalk (2) is further provided with a winch (10) for pulling the mechanical hand two (12). The hydraulic catwalk (2) is further provided with a winch (10) for pulling the mechanical hand two (12).

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