Electro-hydraulic hybrid drive injection head

Abstract

The present application relates to oil and gas drilling equipment technical field, propose a kind of electro-hydraulic hybrid drive injection head, it includes base, frame and be arranged on the frame electric drive system, chain system, clamping system, tensioning system, guide system, electric control system, electric drive system, tensioning system and clamping system are connected with chain system, the guide passage formed in guide system is connected with the injection channel formed in chain system;Base is equipped with modular integrated control valve group, liquid path quick connection panel and cable quick connection panel, and liquid path quick connection panel and cable quick connection panel are respectively connected with liquid supply system and power supply system, and cable quick connection panel is electrically connected with electric drive system, and liquid path quick connection panel is connected with electric drive system, clamping system, tensioning system and guide system by oil pipe, and modular integrated control valve group is connected on oil pipe.The present application can solve the problem that current electric drive injection head volume is relatively large, external hydraulic pipeline is complex, maintenance is difficult, and the problems of poor implementability and safety.

Description

Technical Field

[0001] This invention relates to the field of oil and gas drilling equipment technology, and in particular to an electro-hydraulic hybrid driven injection head. Background Technology

[0002] Coiled tubing installation rigs can be used for well workover, reservoir stimulation, logging, well completion testing, and oil and gas production, hence they are often referred to as "all-purpose rigs" in the oil and gas development field. In recent years, diesel / gasoline-driven coiled tubing installation rigs have largely matured and become standardized. With the deepening of green and environmentally friendly development concepts and the increasing prominence of the advantages of electric drive technology, electric-driven coiled tubing installation rigs have become the main direction for future equipment development. The injection head is one of the core components of a coiled tubing installation rig. Its core function is to raise and lower the coiled tubing. In conventional coiled tubing installation rigs, the injection head relies on a hydraulic motor to output torque and speed, and a hydraulic cylinder performs clamping and tensioning actions. The power source is a hydraulic pump remotely provided by a diesel engine or engine-driven hydraulic pump.

[0003] Currently, electrically driven injection heads mainly have the following structural forms:

[0004] Chinese invention patent application CN113931587A discloses a continuous tubing device powered by electricity. The proposed electric drive injection head uses an electric motor instead of a hydraulic motor for driving, and the operation of the motor is controlled by a frequency conversion control system. The hydraulic pump driven by the electric motor provides hydraulic power to the hydraulic cylinder remotely. However, this method still requires a large number of hydraulic pipelines to be connected remotely, and the distance between the control element and the execution element is far, resulting in a slow response time. It does not fully utilize the advantages of electric drive technology in terms of precise control.

[0005] Chinese invention patent application CN115234182A discloses an injection head for a continuous pipe laying machine. The proposed electrically driven injection head improves upon the electronic control method, storing hydraulic and lubricating oil on the injection head base. A lubrication pump assembly is installed on the injection head, and the integrated control valve assembly is centrally located there. At least one set of electro-hydraulic cylinders is used for the clamping and tensioning cylinders. While this solution achieves electric drive control of the injection head, in practical engineering applications, all electrical components on the injection head must undergo explosion-proof certification. The power output of the explosion-proof electro-hydraulic cylinders is limited and cannot completely replace hydraulic cylinders, and they occupy a larger volume. Therefore, the volume of the electrically driven injection head is significantly larger than that of a conventional injection head. Furthermore, the compact upper structure space makes installation, disassembly, and maintenance inconvenient, resulting in poor feasibility. In addition, the control of the injection head's blowout preventer and guide also requires hydraulic power from a hydraulic station, and the number of pipelines required to connect to the injection head cannot be reduced.

[0006] Chinese utility model patent CN217327244U discloses an injection head device that integrates the hydraulic station and lubrication station onto the injection head body, avoiding remote connection of hydraulic lines. However, this solution results in a more compact upper structure, and the control of components such as rollers and blowout preventers still requires additional power from the hydraulic station, increasing equipment costs. After the electric injection head replaces the hydraulic motor of a conventional injection head with an electric motor, the dynamic braking and load-lifting function of the balance valve, which works in conjunction with the hydraulic motor, is lost. This poses a significant safety risk in the event of an unexpected power outage or motor failure.

[0007] As mentioned above, current electric-driven injection heads have problems such as significantly increased volume compared to conventional injection heads, redundant hydraulic stations, difficulty in maintenance, poor feasibility, complex hydraulic pipelines, and greater safety risks in case of emergencies. Summary of the Invention

[0008] The purpose of this invention is to provide an electro-hydraulic hybrid driven injection head, which solves the problems of current electric-driven injection heads being too large, having complex external hydraulic pipelines, being difficult to maintain, and having poor feasibility and safety.

[0009] The above-mentioned technical objectives of this invention are mainly achieved through the following technical solutions:

[0010] The present invention provides an electro-hydraulic hybrid driven injection head, which includes a base, a frame, and an electric drive system, a chain system, a clamping system, a tensioning system, a guide system, and an electric control system disposed on the frame. The frame is disposed on the base. The electric drive system, the tensioning system, and the clamping system are all connected to the chain system. The guide channel formed in the guide system is connected to the injection channel formed in the chain system.

[0011] The base is equipped with a modular integrated control valve assembly, a hydraulic quick-connect panel, and a cable quick-connect panel. The hydraulic quick-connect panel and the cable quick-connect panel are respectively connected to a hydraulic supply system and a power supply system. The cable quick-connect panel is electrically connected to the electric drive system. The hydraulic quick-connect panel is connected to the electric drive system, the clamping system, the tensioning system, and the guiding system through oil pipes. The modular integrated control valve assembly is connected to the oil pipes. The electronic control system is electrically connected to the electric drive system and the modular integrated control valve assembly.

[0012] In a preferred embodiment of the present invention, the electric drive system includes:

[0013] The drive sprocket is connected to the chain system.

[0014] A central shaft passes through the drive sprocket and can rotate relative to the drive sprocket;

[0015] A right-angle reducer is connected to one end of the central shaft;

[0016] The main reducer is connected to the other end of the central shaft and is connected to the drive sprocket;

[0017] An explosion-proof servo motor is connected to the right-angle reducer;

[0018] The brake is connected to the main reducer.

[0019] In a preferred embodiment of the present invention, the explosion-proof servo motor is provided with an encoder capable of recording the operating parameters of the explosion-proof servo motor. The encoder is electrically connected to a driver in the electronic control system to achieve closed-loop precise control of the explosion-proof servo motor.

[0020] In a preferred embodiment of the present invention, a housing is provided within the frame, the electric drive system is mounted on the housing, and the housings of the main reducer and the right-angle reducer are both fixedly connected to the housing.

[0021] In a preferred embodiment of the present invention, the guiding system includes a guide extending in a predetermined direction, the guide being connected to the top of the frame, and a guide cylinder for adjusting the position of the guide being connected between the guide and the frame.

[0022] The guide has a guide channel for accommodating the continuous tube. Along the extension direction of the guide channel, the guide is provided with a plurality of pressure boxes at intervals. The pressure boxes can press the continuous tube into the guide channel. A pressure box cylinder is connected between the guide and the pressure boxes for adjusting the clamping force of the pressure boxes.

[0023] In a preferred embodiment of the present invention, the modular integrated control valve assembly is connected to a guide control unit, the guide control unit comprising:

[0024] A guide oil circuit is connected between the hydraulic quick-connect panel and the guide cylinder to drive the guide to rise and fall.

[0025] The pressure box oil circuit is connected between the hydraulic quick-connect panel and the pressure box cylinder to drive the opening and closing of the pressure box;

[0026] Both the guide oil circuit and the pressure box oil circuit are equipped with a first electromagnetic reversing valve and a throttle valve, and both the first electromagnetic reversing valve and the throttle valve are installed in the modular integrated control valve group.

[0027] In a preferred embodiment of the present invention, the clamping system includes multiple sets of clamping cylinders, the retraction of which can drive the chain system to clamp the continuous tube;

[0028] The tensioning system includes multiple sets of tensioning cylinders, and the downward extension of the tensioning cylinders can drive the chain system to be tensioned downward.

[0029] In a preferred embodiment of the present invention, the modular integrated control valve assembly is connected to a chain control unit, the chain control unit comprising:

[0030] The clamping oil supply line is connected to the hydraulic quick-connect panel. The clamping oil supply line is equipped with a first electro-proportional pressure reducing valve and a second electromagnetic reversing valve. The second electromagnetic reversing valve is connected to a branch line between each group of clamping cylinders. Each branch line is equipped with a third electromagnetic reversing valve.

[0031] The return oil line is clamped and connected between the second solenoid directional valve and the hydraulic quick-connect panel;

[0032] The first electro-proportional pressure reducing valve, the second solenoid directional valve, and the third solenoid directional valve are all installed in the modular integrated control valve group.

[0033] In a preferred embodiment of the present invention, the chain control unit further includes:

[0034] An emergency clamping oil supply line is connected between the quick-connect panel of the hydraulic circuit and each of the branch lines.

[0035] In a preferred embodiment of the present invention, pressure transmitters are provided on the clamping oil supply line and each of the branch lines.

[0036] In a preferred embodiment of the present invention, the chain control unit further includes:

[0037] The tensioning oil line is connected between the hydraulic quick-connect panel and the tensioning cylinder. The tensioning oil line is equipped with a second electro-proportional pressure reducing valve and a fourth solenoid directional valve.

[0038] The second electro-proportional pressure reducing valve and the fourth solenoid directional valve are both installed in the modular integrated control valve group.

[0039] In a preferred embodiment of the present invention, a pressure transmitter is provided on the tensioning oil line.

[0040] In a preferred embodiment of the present invention, a blowout preventer is provided at the lower end of the base, and the modular integrated control valve assembly is connected to a blowout preventer control unit, the blowout preventer control unit comprising:

[0041] The blowout preventer oil circuit is connected between the quick-connect panel and the blowout preventer, and the blowout preventer oil circuit is equipped with a third electro-proportional pressure reducing valve and a fifth solenoid directional valve.

[0042] Both the third electro-proportional pressure reducing valve and the fifth solenoid directional valve are installed within the modular integrated control valve group.

[0043] In a preferred embodiment of the present invention, a pressure transmitter is provided in the oil circuit of the blowout preventer.

[0044] In a preferred embodiment of the present invention, the modular integrated control valve assembly is connected to a brake control unit, the brake control unit comprising:

[0045] The brake oil circuit is connected between the hydraulic quick-connect panel and the brake, and the brake oil circuit is equipped with a pressure reducing valve and a sixth solenoid directional valve;

[0046] Both the pressure reducing valve and the sixth solenoid directional valve are installed within the modular integrated control valve assembly.

[0047] In a preferred embodiment of the present invention, a pressure transmitter is provided in the brake oil circuit.

[0048] In a preferred embodiment of the present invention, the modular integrated control valve assembly is connected to a lubrication control unit, the lubrication control unit comprising:

[0049] A drive lubrication line is connected between the hydraulic quick-connect panel and the electric drive system;

[0050] A chain lubrication line is connected between the hydraulic quick-connect panel and the chain system;

[0051] Both the drive lubrication line and the chain lubrication line are equipped with a seventh electromagnetic reversing valve.

[0052] The seventh electromagnetic directional valve is installed within the modular integrated control valve group.

[0053] In a preferred embodiment of the present invention, the quick-connect panel for the hydraulic circuit is provided with an oil supply interface, an oil return interface, an emergency interface and a lubrication interface, and the hydraulic supply system is connected to the oil supply interface, the oil return interface, the emergency interface and the lubrication interface respectively through oil pipes.

[0054] In a preferred embodiment of the present invention, the fluid supply system includes a hydraulic power unit, the hydraulic power unit comprising:

[0055] Hydraulic oil tank;

[0056] An external oil supply line is connected between the hydraulic oil tank and the oil supply interface. Along the flow direction of the oil in the external oil supply line, an oil suction filter, an electric oil pump and a filter are sequentially installed on the external oil supply line.

[0057] An external return oil line is connected between the return oil interface and the hydraulic oil tank, and a return oil filter is provided on the external return oil line;

[0058] An external emergency oil supply line is connected between the hydraulic oil tank and the emergency interface. The external emergency oil supply line is equipped with a manual oil pump and a ball valve.

[0059] In a preferred embodiment of the present invention, the liquid supply system includes a lubrication power unit, the lubrication power unit comprising:

[0060] Lubricating oil tank;

[0061] An external lubrication line is connected between the lubricating oil tank and the lubrication interface, and an electronic oil pump is provided on the external lubrication line.

[0062] Compared with the prior art, the present invention has the following features and advantages:

[0063] 1. The electric drive system of this invention adopts a transmission form of explosion-proof servo motor + right-angle reducer + central shaft + main reducer + drive sprocket. Compared with the hydraulic motor drive system, the electric drive system integrates an encoder on the motor, which can provide real-time feedback on various parameters such as motor speed and torque, realizing closed-loop control. The parameter control is more precise and the response is faster. Compared with the horizontal installation of AC variable frequency motor, the explosion-proof servo motor is more compact. The vertical arrangement after the right-angle reducer commutation allows for auxiliary fixation between the motor tail and the housing, avoiding the cantilever beam structure. The stress distribution is more reasonable and the rigidity is stronger. There is no need to increase the frame size of the injection head, realizing the lightweight and miniaturization of the injection head.

[0064] 2. This invention arranges a modular integrated control valve group on the base of the injection head, and arranges electrical components such as sensors and controllers in an explosion-proof electrical control cabinet (electrical control system). The entire machine retains only one hydraulic station to provide hydraulic power for control of each working unit within the injection head. The injection head only has four hydraulic interfaces: oil supply interface, oil return interface, emergency interface, and lubrication interface. Compared with conventional injection heads, the required hydraulic pipelines are significantly reduced. Compared with the existing electric drive injection head technology, the hydraulic oil tank, pump group, explosion-proof motor, and other hydraulic station components are not arranged on the injection head, saving the upper structure space of the injection head and making the structure of the injection head more compact. At the same time, it avoids setting too many hydraulic stations in the whole machine, reducing production costs, simplifying the control system, and further improving the reliability of the system.

[0065] 3. This invention highly integrates the lubrication system on the injection head, eliminating components such as the lubricating oil tank and pneumatic booster pump found on conventional injection heads. Only the lubrication nozzle remains. The lubrication nozzle shares an external lubricating oil tank and an external electronic oil pump with the electric drive system. This approach not only avoids the explosion-proof issues associated with mounting the electronic oil pump on the injection head, but also saves space on the injection head, reduces its size and weight, lowers the overall cost, and makes the lubrication system simpler and more efficient.

[0066] 4. This invention provides an emergency clamping oil supply line for the clamping system, which is remotely supplied with hydraulic power by a manual pump. In the event of a power outage or failure of the external fluid supply system, it can provide emergency clamping pressure, avoiding the risk of pipe slippage due to loss of clamping force. The emergency interface design solves the emergency control problem of the injection head in sudden situations, greatly improving the safety and reliability of the injection head's drive and control. Attached Figure Description

[0067] 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0068] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0069] Figure 1 This is a schematic diagram of the structure of the electro-hydraulic hybrid-driven injection head described in this invention;

[0070] Figure 2 This is another structural schematic diagram of the electro-hydraulic hybrid-driven injection head described in this invention;

[0071] Figure 3 This is a side view of the injection head driven by electro-hydraulic hybridization according to the present invention.

[0072] Figure 4 This is a schematic diagram of the electric drive system described in this invention;

[0073] Figure 5 This is a schematic diagram of the structure of the guidance control unit described in this invention;

[0074] Figure 6 This is a schematic diagram of the chain control unit described in this invention;

[0075] Figure 7 This is a schematic diagram of the structure of the blowout preventer control unit described in this invention;

[0076] Figure 8 This is a schematic diagram of the brake control unit described in this invention;

[0077] Figure 9 This is a schematic diagram of the lubrication control unit and lubrication power unit described in this invention;

[0078] Figure 10 This is a schematic diagram of the connection structure between the hydraulic power unit and the injection head described in this invention.

[0079] Explanation of reference numerals in the attached figures:

[0080] 10. Base; 11. Frame; 12. Housing; 13. Electric drive system; 14. Chain system; 15. Clamping system; 16. Tensioning system; 17. Guiding system; 18. Explosion-proof electrical control cabinet; 19. Modular integrated control valve group;

[0081] 20. Drive sprocket; 21. Central shaft; 22. Right-angle reducer; 23. Main reducer; 24. Explosion-proof servo motor; 25. Brake; 26. Encoder;

[0082] 30. Guide; 31. Guide cylinder; 32. Press box; 33. Press box cylinder;

[0083] 40. Hydraulic quick-connect panel; 41. Oil supply main pipe; 42. Oil return main pipe; 43. Cable quick-connect panel;

[0084] 50. Guide valve oil circuit; 51. Pressure box oil circuit; 52. First solenoid directional valve; 53. Throttle valve;

[0085] 60. Clamping cylinder; 61. Clamping oil supply line; 62. First electro-proportional pressure reducing valve; 63. Second solenoid directional valve; 64. Branch line; 65. Third solenoid directional valve; 66. Clamping return oil line; 67. Emergency clamping oil supply line; 68. First pressure transmitter;

[0086] 70. Tensioning cylinder; 71. Tensioning oil line; 72. Second electro-proportional pressure reducing valve; 73. Fourth solenoid directional valve; 74. Second pressure transmitter;

[0087] 80. Blowout preventer box; 81. Blowout preventer box oil circuit; 82. Third electro-proportional pressure reducing valve; 83. Fifth solenoid directional valve; 84. Third pressure transmitter;

[0088] 90. Brake hydraulic circuit; 91. Pressure reducing valve; 92. Sixth solenoid directional valve; 93. Fourth pressure transmitter;

[0089] 100. Drive lubrication line; 101. Chain lubrication line; 102. Seventh solenoid directional valve;

[0090] 200. Hydraulic oil tank; 201. External oil supply line; 202. External oil return line; 203. External emergency oil supply line; 204. Suction filter; 205. Electric oil pump; 206. Filter; 207. Return oil filter; 208. Manual oil pump; 209. Ball valve;

[0091] 300. Lubricating oil tank; 301. External lubrication pipeline; 302. Electronic oil pump. Detailed Implementation

[0092] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0093] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0094] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0095] like Figures 1 to 10As shown, the present invention provides an electro-hydraulic hybrid driven injection head, which includes a base 10, a frame 11, and an electric drive system 13, a chain system 14, a clamping system 15, a tensioning system 16, a guide system 17, and an electronic control system disposed on the frame 11. The frame 11 is disposed on the base 10. The electric drive system 13, the tensioning system 16, and the clamping system 15 are all connected to the chain system 14. The guide channel formed in the guide system 17 is connected to the injection channel formed in the chain system 14. A module is provided on the base 10. The modular integrated control valve assembly 19, the hydraulic quick-connect panel 40, and the cable quick-connect panel 43 are respectively connected to the hydraulic supply system and the power supply system. The cable quick-connect panel 43 is electrically connected to the electric drive system 13. The hydraulic quick-connect panel 40 is connected to the electric drive system 13, the clamping system 15, the tensioning system 16, and the guiding system 17 through oil pipes. The modular integrated control valve assembly 19 is connected to the oil pipes. The electric control system is electrically connected to the electric drive system 13 and the modular integrated control valve assembly 19.

[0096] This invention arranges a modular integrated control valve assembly 19 on the base 10 of the injection head. Structures requiring hydraulic power, such as the clamping system 15, tensioning system 16, and guiding system 17, are all connected to the modular integrated control valve assembly 19 via oil pipes. The control valves on each oil pipe are integrated onto the base 10. The modular integrated control valve assembly 19 is connected to an external hydraulic supply system via a quick-connect panel 40. The entire machine retains only one hydraulic station to provide hydraulic power for control of each working unit within the injection head. Compared to conventional electrically driven injection heads, the number of required oil pipes is significantly reduced. Compared to existing electrically driven injection head technologies, the hydraulic oil tank 200, pump set, explosion-proof motor, and other hydraulic station components are not located on the injection head, saving space on the upper structure and allowing for a more compact structure. This also avoids having too many hydraulic stations in the entire machine, reducing production costs, simplifying the control system, and further improving system reliability.

[0097] The following section will provide a detailed description of the specific structure of each part of the electro-hydraulic hybrid-driven injection head described in this invention, as well as the position and connection relationship between each part.

[0098] like Figures 1 to 3As shown, the injection head has a cubic structure. The base 10 and frame 11 are both assembled from long, narrow steel components. The frame 11 is mounted above the base 10. The electric drive system 13, chain system 14, clamping system 15, and tensioning system 16 are all installed within the frame 11. The electric drive system 13 is located in the upper part of the frame 11 and includes two parallel main drive shafts. The chain system 14 is installed between the main drive shaft and the driven shaft within the electric drive system 13. It includes two sets of chains arranged opposite each other, each set mounted on one of the two main drive shafts. The rotation of the main drive shafts drives the chains to rotate, forming an injection channel between the two sets of chains. The continuous tube is installed within the injection channel and can be injected downwards into the formation under the drive of the chains. A clamping system 15 is provided between the two sets of chains. The clamping system 15 includes multiple clamping cylinders 60, push plates, and clamping beams. The clamping cylinders 60 retract to push the push plates, thereby causing the two sets of chains to move closer together to clamp the continuous tube. A tensioning system 16 is provided on the driven shaft below the electric drive system 13. The tensioning system 16 includes multiple sets of tensioning cylinders 70. The tensioning cylinders 70 extend downward, and the main drive shaft and the driven shaft move away from each other, thereby driving the chain in the chain system 14 to be tensioned downward.

[0099] The electric drive system 13, chain system 14, clamping system 15 and tensioning system 16 inside the injection head are essential structures for realizing continuous tube injection. The technology is relatively mature and the general structure of each system is basically fixed. Therefore, the detailed structure of each system will not be further explained here.

[0100] Furthermore, such as Figure 2 As shown, the frame 11 also includes an explosion-proof electrical control cabinet 18. The explosion-proof electrical control cabinet 18 is equipped with sensors, controllers, terminal block controllers and isolation barriers to form an electrical control system. It records and transmits data while meeting the explosion-proof requirements of electrical components, and controls the electric drive system 13 and the modular integrated control valve group 19.

[0101] Furthermore, such as Figure 1 As shown, the guide system 17 is installed on the top of the frame 11. The guide system 17 includes a guide 30 extending in a predetermined direction. The guide 30 is connected to the top of the frame 11, and a guide cylinder 31 for adjusting the position of the guide 30 is connected between the guide 30 and the frame 11. A guide channel for accommodating a continuous tube is formed inside the guide 30, and the inlet of the guide channel is connected to the inlet of the injection channel. Along the extension direction of the guide channel, a plurality of pressure boxes 32 are spaced apart on the guide 30. The pressure boxes 32 can press the continuous tube into the guide channel. A pressure box cylinder 33 for adjusting the clamping force of the pressure boxes 32 is connected between the guide 30 and the pressure boxes 32.

[0102] Furthermore, such as Figure 1As shown, the base 10 is provided with a cable quick-connect panel 43, which is provided with a power connector and a data transmission connector. The power connector can be connected to an external power supply system through a wire to supply power to the injection head, mainly supplying power to the electrical control system and the electric drive system 13. The data transmission connector can receive external control commands and transmit them to the electrical control system, thereby controlling the actions of each working unit through the electrical control system.

[0103] Furthermore, such as Figure 1 and Figure 2 As shown, the base 10 is also equipped with a modular integrated control valve assembly 19 and a hydraulic quick-connect panel 40. The hydraulic quick-connect panel 40 is equipped with a hydraulic oil connector and a lubricating oil connector. The hydraulic oil connector is connected to an external fluid supply system via an external oil pipe, thereby inputting high-pressure hydraulic fluid into the injection head. Simultaneously, the lubricating oil connector is connected to an external fluid supply system via an external oil pipe, thereby inputting lubricating oil into the injection head. The modular integrated control valve assembly 19 contains multiple functional unit modules. Each functional unit module includes multiple cooperating control valves and corresponding pipelines. The modular integrated control valve assembly 19 is connected to the electric drive system 13, clamping system 15, tensioning system 16, and guiding system 17 via internal oil pipes. Each internal oil pipe is equipped with one functional unit module from within the modular integrated control valve assembly 19; that is, each internal oil pipe passes through the modular integrated control valve assembly 19. The electrical control system is electrically connected to the modular integrated control valve assembly 19 and is used to control the control valves within each functional unit module. The control valves on the internal oil pipes of the injection head are centrally located, and the input ends of each internal oil pipe are centrally connected to the hydraulic quick-connect panel 40. Thus, oil can be supplied to each working unit in the injection head by connecting only one external hydraulic supply system, simplifying the hydraulic pipeline layout. At the same time, by placing the hydraulic supply system externally, there is no need to consider the explosion-proof problem of the hydraulic supply system.

[0104] The structure and technical effects of the preferred embodiment of the electro-hydraulic hybrid driven injection head of the present invention will be described in detail below.

[0105] According to one embodiment of the present invention, such as Figure 1 and Figure 4As shown, the electric drive system 13 includes a drive sprocket 20, a central shaft 21, a right-angle reducer 22, a main reducer 23, an explosion-proof servo motor 24, and a brake 25. The drive sprocket 20 is connected to the chain in the chain system 14. The central shaft 21 passes through the drive sprocket 20 and can rotate relative to it. The right-angle reducer 22 is connected to one end of the central shaft 21. The main reducer 23 is connected to the other end of the central shaft 21 and is connected to the drive sprocket 20. The explosion-proof servo motor 24 is connected to the right-angle reducer 22. The brake 25 is connected to the main reducer 23. A housing 12 is provided inside the frame 11. The electric drive system 13 is mounted on the housing 12. The housings of the main reducer 23 and the right-angle reducer 22 are both fixedly connected to the housing 12.

[0106] The torque output by the explosion-proof servo motor 24 is transmitted to the central shaft 21 after passing through the right-angle reducer 22, and then from the central shaft 21 to the main reducer 23, and then from the main reducer 23 to the drive sprocket 20. The drive sprocket 20 drives the chain in the chain system 14 to rotate, so as to realize the raising and lowering of the continuous tube.

[0107] The right-angle reducer 22 can amplify torque, reduce speed, and also perform commutation, avoiding the cantilever beam structure caused by the excessive length of the explosion-proof servo motor 24, resulting in a more rational force distribution. Furthermore, because the explosion-proof servo motor itself is smaller in size compared to other types of motors, the structure of the electric drive system 13 is more compact than existing electric drive injection head technologies. The tail of the main reducer 23 integrates a brake 25, which amplifies torque, reduces speed, and also provides braking functionality.

[0108] Furthermore, such as Figure 4 As shown, the explosion-proof servo motor 24 is equipped with an encoder 26 that records the operating parameters of the explosion-proof servo motor 24. The encoder 26 is electrically connected to the driver in the electronic control system to achieve closed-loop precise control of the explosion-proof servo motor 24. The encoder 26 can record parameters such as the speed and torque of the explosion-proof servo motor 24, and the driver can achieve closed-loop precise control.

[0109] According to one embodiment of the present invention, the quick-connect panel 40 of the hydraulic circuit is provided with an oil supply interface, an oil return interface, an emergency interface, and a lubrication interface. Outside the injection head, the fluid supply system is connected to the oil supply interface, the oil return interface, the emergency interface, and the lubrication interface respectively via oil pipes; inside the injection head, the oil supply interface and the oil return interface are respectively connected to an oil supply main pipe 41 and an oil return main pipe 42, which are used to connect to the modular integrated control valve group 19.

[0110] The quick-connect panel 40 for the hydraulic circuit has only four interfaces: oil supply interface, oil return interface, emergency interface, and lubrication interface. Compared with the hydraulic circuit of a conventional injection head, this reduces the number of hydraulic lines required for connection, decreases the workload of inserting and removing lines, and reduces the risk of oil leakage. The oil supply and return interfaces inside the injection head are pumped with hydraulic power by an external hydraulic supply system and then connected to the respective functional unit modules within the modular integrated control valve group 19. Compared with existing electrically driven injection head technologies, this minimizes the number of hydraulic stations, avoids excessive redundant design, and makes the system more concise.

[0111] According to one embodiment of the present invention, such as Figure 1 , Figure 2 and Figure 5 As shown, the modular integrated control valve assembly 19 is connected to a guide control unit, which includes a guide oil circuit 50 and a pressure box oil circuit 51. The guide oil circuit 50 is connected between the hydraulic quick-connect panel 40 and the guide cylinder 31 to drive the guide 30 to rise and fall; the pressure box oil circuit 51 is connected between the hydraulic quick-connect panel 40 and the pressure box cylinder 33 to drive the pressure box 32 to open and close; both the guide oil circuit 50 and the pressure box oil circuit 51 are equipped with a first solenoid directional valve 52 and a throttle valve 53, which are both installed within the modular integrated control valve assembly 19.

[0112] Specifically, such as Figure 5 As shown, the guide oil circuit 50 is connected to the oil supply main pipe 41 and the oil return main pipe 42. The first solenoid directional valve 52 is a three-position four-way solenoid valve, used to control the lifting and lowering of the guide 30 and the opening and closing of the pressure box 32. When the relay K20B on the three-position four-way solenoid valve is energized, the pressure box 32 opens; when the relay K20A on the three-position four-way solenoid valve is energized, the pressure box 32 closes; when relays K20A and K20B are not energized, the pressure box oil circuit 51 is in the open state. When relay K21B is energized, the guide 30 descends; when relay K21A is energized, the guide 30 rises; when relays K21A and K21B are not energized, the guide oil circuit 50 is in the open state.

[0113] In a preferred embodiment of the present invention, such as Figure 1 , Figure 2 and Figure 6As shown, the modular integrated control valve assembly 19 is connected to a chain control unit, which includes a clamping oil supply line 61 and a clamping oil return line 66. The clamping oil supply line 61 is connected to the hydraulic quick-connect panel 40, and is equipped with a first electro-proportional pressure reducing valve 62 and a second solenoid directional valve 63. Each clamping cylinder 60 is connected to a branch line 64, and each branch line 64 is equipped with a third solenoid directional valve 65. The clamping oil return line 66 is connected between the second solenoid directional valve 63 and the hydraulic quick-connect panel 40. The first electro-proportional pressure reducing valve 62, the second solenoid directional valve 63, and the third solenoid directional valve 65 are all installed in the modular integrated control valve assembly 19.

[0114] Specifically, such as Figure 6 As shown, the clamping oil supply line 61 is connected to the main oil supply line 41, and the clamping return oil line 66 is connected to the main return oil line 42. The clamping pressure is adjusted by controlling the first electro-proportional pressure reducing valve 62 via an electrical signal. The second solenoid directional valve 63 is a two-position three-way solenoid valve, and the third solenoid directional valve 65 is a two-position two-way solenoid valve. When the relay K26 on the two-position two-way solenoid valve is energized, the clamping oil supply line 61 is disconnected, and the clamping return oil line 66 is connected for clamping pressure relief. When the relay K26 on the two-position two-way solenoid valve is de-energized, the clamping oil supply line 61 is connected, and the clamping return oil line 66 is disconnected for clamping pressure maintenance. In this embodiment, the clamping oil supply line 61 is connected to three branch lines 64. The three branch lines 64 are respectively connected to the upper, middle and lower clamping cylinders 60. Each of the three branch lines 64 is equipped with a two-position two-way solenoid valve. When the corresponding relay (K27, K28, K29) on the two-position two-way solenoid valve is energized, the corresponding branch line 64 is connected, which can control the clamping cylinder 60 of that line to achieve clamping. When the relay is de-energized, clamping and pressure holding can be achieved.

[0115] Better, such as Figure 6 As shown, a first pressure transmitter 68 is installed on the clamping oil supply line 61 and each branch line 64. The first pressure transmitter 68 is installed in the modular integrated control valve group 19. Multiple first pressure transmitters 68 are used to provide feedback on the clamping oil supply pressure, upper clamping pressure, middle clamping pressure and lower clamping pressure, respectively.

[0116] According to one embodiment of the present invention, such as Figure 6 As shown, the chain control unit also includes an emergency clamping oil supply line 67, which is connected between the hydraulic quick-connect panel 40 and each branch line 64. In the event of a power outage or failure of the external hydraulic supply system, it can provide emergency clamping pressure, avoiding the risk of pipe slippage due to loss of clamping force.

[0117] Specifically, such as Figure 6As shown, one end of the emergency clamping oil supply line 67 is connected to the emergency interface on the hydraulic quick-connect panel 40, and the other end is connected to three branch lines 64 through check valves. The check valves are also installed in the modular integrated control valve group 19.

[0118] According to one embodiment of the present invention, such as Figure 6 As shown, the chain control unit also includes a tensioning oil line 71, which is connected between the hydraulic quick-connect panel 40 and the tensioning cylinder 70. The tensioning oil line 71 is equipped with a second electro-proportional pressure reducing valve 72 and a fourth solenoid directional valve 73. The second electro-proportional pressure reducing valve 72 and the fourth solenoid directional valve 73 are installed in the modular integrated control valve group 19.

[0119] Specifically, such as Figure 6 As shown, one end of the tensioning oil line 71 is connected to the main oil supply line 41. The tensioning pressure is adjusted by controlling the second electro-proportional pressure reducing valve 72 via an electrical signal. The fourth solenoid directional valve 73 is a two-position, two-way solenoid valve. When the relay K24 on the two-position, two-way solenoid valve is energized, the tensioning oil line 71 is connected, providing and releasing tensioning pressure to tension the chain in the chain system 14. When the relay K24 on the two-position, two-way solenoid valve is de-energized, the tensioning pressure is maintained.

[0120] Better, such as Figure 6 As shown, a second pressure transmitter 74 is provided on the tensioning oil line 71. The second pressure transmitter 74 is installed in the modular integrated control valve group 19; the second pressure transmitter 74 can provide feedback on the magnitude of the tensioning pressure.

[0121] According to one embodiment of the present invention, such as Figure 3 and Figure 7 As shown, the lower end of the base 10 is provided with a blowout preventer box 80. The modular integrated control valve group 19 is connected to the blowout preventer box control unit. The blowout preventer box control unit includes a blowout preventer oil circuit 81, which is connected between the hydraulic quick-connect panel 40 and the blowout preventer box 80. The blowout preventer oil circuit 81 is provided with a third electro-proportional pressure reducing valve 82 and a fifth solenoid directional valve 83. The third electro-proportional pressure reducing valve 82 and the fifth solenoid directional valve 83 are both installed in the modular integrated control valve group 19.

[0122] Specifically, such as Figure 3 and Figure 7 As shown, the blowout preventer (BOP) 80 is used for dynamic sealing of the well pressure and is a core well control component in coiled tubing operations. The BOP's oil passage 81 is connected to the supply manifold 41 and the return manifold 42. The pressure of the BOP 80 is adjusted by controlling the third electro-proportional pressure reducing valve 82 via an electrical signal. The fifth solenoid directional valve 83 is a three-position four-way solenoid valve. When the relay K31A on the three-position four-way solenoid valve is energized, the BOP 80 is pressed down; when the relay K31B on the three-position four-way solenoid valve is energized, the BOP 80 is released.

[0123] Better, such as Figure 7 As shown, a third pressure transmitter 84 is provided on the oil circuit 81 of the blowout preventer box. The third pressure transmitter 84 is installed in the modular integrated control valve group 19; the pressure of the blowout preventer box 80 is fed back in real time through the third pressure transmitter 84.

[0124] According to one embodiment of the present invention, such as Figure 8 As shown, the modular integrated control valve group 19 is connected to a brake control unit. The brake control unit includes a brake oil circuit 90, which is connected between the hydraulic quick-connect panel 40 and the brake 25. The brake oil circuit 90 is equipped with a pressure reducing valve 91 and a sixth solenoid directional valve 92. The pressure reducing valve 91 and the sixth solenoid directional valve 92 are installed in the modular integrated control valve group 19.

[0125] Specifically, such as Figure 8 As shown, the brake oil circuit 90 is connected to the main oil supply pipe 41 and the main oil return pipe 42. The pressure reducing valve 91 is used to regulate the brake pressure. The sixth solenoid directional valve 92 is a two-position three-way solenoid valve. When the two-position three-way solenoid valve is de-energized, the brake 25 has no pressure and is in a braking state. When the two-position three-way solenoid valve is energized, the brake 25 gains pressure and the brake is released.

[0126] Preferably, the design includes a brake 25 control strategy in case of power failure. When an external power failure signal is detected, the UPS power supply or battery module will continue to supply power to the drive system, and the explosion-proof servo motor 24 will rotate in reverse to actively decelerate. When the speed is less than or equal to 100 RPM, the brake 25 will enter a braking state, and the injection head will stop. If the UPS power supply or battery module fails to connect successfully, the power failure timer function will be activated. When the power failure time is greater than or equal to 0.2 seconds, the brake 25 will directly enter a braking state, forcing the injection head to stop and preventing the continuous tube from stalling and falling due to lack of torque output from the motor. The emergency control strategy of the brake 25 solves the emergency control problem of the electric drive injection head in sudden situations, significantly improving the safety and reliability of the drive and control of the electric drive injection head.

[0127] Better, such as Figure 8 As shown, a fourth pressure transmitter 93 is provided on the brake oil circuit 90. The fourth pressure transmitter 93 is installed in the modular integrated control valve group 19; the fourth pressure transmitter 93 provides real-time feedback on the magnitude of the brake pressure.

[0128] According to one embodiment of the present invention, such as Figure 9As shown, the modular integrated control valve assembly 19 is connected to a lubrication control unit, which includes a drive lubrication line 100 and a chain lubrication line 101. The drive lubrication line 100 is connected between the hydraulic quick-connect panel 40 and the electric drive system 13. The chain lubrication line 101 is connected between the hydraulic quick-connect panel 40 and the chain system 14. A seventh solenoid directional valve 102 is provided on both the drive lubrication line 100 and the chain lubrication line 101. The seventh solenoid directional valve 102 is installed in the modular integrated control valve assembly 19.

[0129] Specifically, such as Figure 9 As shown, for ease of explanation of the structure of the lubrication control unit, Figure 9 The lubrication interface on the quick-connect panel 40 is not shown. One end of the drive lubrication line 100 is connected to the lubrication interface on the quick-connect panel 40, and the other end is connected to the lubrication space within the electric drive system 13. Lubricating oil can enter the electric drive system 13 for lubrication through the drive lubrication line 100. One end of the chain lubrication line 101 is connected to the lubrication interface on the quick-connect panel 40, and the other end is connected to the lubrication nozzle on the chain system 14. Lubricating oil can be sprayed from the lubrication nozzle onto the chain through the chain lubrication line 101, thereby lubricating the chain system 14. The seventh solenoid directional valve 102 is a two-position two-way solenoid valve, which can control the drive lubrication line 100 and the chain lubrication line 101 to switch between bidirectional and unidirectional flow.

[0130] Furthermore, such as Figure 9 As shown, the liquid supply system has a lubrication power unit, which includes a lubricating oil tank 300 and an external lubrication line 301. The external lubrication line 301 is connected between the lubricating oil tank 300 and the lubrication interface (that is, the external lubrication line 301 is connected to the drive lubrication line 100 and the chain lubrication line 101). An electronic oil pump 302 is provided on the external lubrication line 301.

[0131] The lubrication system on the injection head is highly integrated, eliminating components such as the lubricating oil tank and pneumatic booster pump found on conventional injection heads. Only the lubrication nozzle remains. The lubrication nozzle shares an external lubricating oil tank 300 and an external electronic oil pump 302 with the electric drive system 13. This approach not only avoids the explosion-proof problem of mounting the electronic oil pump 302 on the injection head, but also saves space on the upper part of the injection head, reduces the size and weight of the injection head, lowers the overall cost, and makes the lubrication system simpler and more efficient.

[0132] According to one embodiment of the present invention, such as Figure 10 As shown (for ease of explanation of the structure of the lubrication control unit), Figure 10(The oil supply interface and return interface on the hydraulic quick-connect panel 40 are not shown in the diagram.) The hydraulic supply system also has a hydraulic power unit, which includes a hydraulic oil tank 200, an external oil supply line 201, an external oil return line 202, and an external emergency oil supply line 203. The external oil supply line 201 is connected between the hydraulic oil tank 200 and the oil supply interface. Along the flow direction of the oil in the external oil supply line 201, an oil suction filter 204, an electric oil pump 205, and a filter 206 are sequentially installed on the external oil supply line 201. The external oil return line 202 is connected between the oil return interface and the hydraulic oil tank 200, and an oil return filter 207 is installed on the external oil return line 202. The external emergency oil supply line 203 is connected between the hydraulic oil tank 200 and the emergency interface, and a manual oil pump 208 and a ball valve 209 are installed on the external emergency oil supply line 203.

[0133] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electro-hydraulic hybrid driven injection head, characterized in that, Includes a base (10), a frame (11), and an electric drive system (13), a chain system (14), a clamping system (15), a tensioning system (16), a guide system (17), and an electric control system mounted on the frame (11). The frame (11) is mounted on the base (10). The electric drive system (13), the tensioning system (16), and the clamping system (15) are all connected to the chain system (14). The guide channel formed in the guide system (17) is connected to the injection channel formed in the chain system (14). The base (10) is provided with a modular integrated control valve group (19), a hydraulic quick-connect panel (40), and a cable quick-connect panel (43). The hydraulic quick-connect panel (40) and the cable quick-connect panel (43) are respectively connected to a liquid supply system and a power supply system. The cable quick-connect panel (43) is electrically connected to the electric drive system (13). The hydraulic quick-connect panel (40) is connected to the electric drive system (13), the clamping system (15), the tensioning system (16), and the guiding system (17) through oil pipes. The modular integrated control valve group (19) is connected to the oil pipes. The electric control system is electrically connected to the electric drive system (13) and the modular integrated control valve group (19).

2. The electro-hydraulic hybrid driven injection head according to claim 1, characterized in that, The electric drive system (13) includes: The drive sprocket (20) is connected to the chain system (14); A central shaft (21) is inserted inside the drive sprocket (20) and can rotate relative to the drive sprocket (20); A right-angle reducer (22) is connected to one end of the central shaft (21); The main reducer (23) is connected to the other end of the central shaft (21) and connected to the drive sprocket (20); An explosion-proof servo motor (24) is connected to the right-angle reducer (22); The brake (25) is connected to the main reducer (23).

3. The electro-hydraulic hybrid driven injection head according to claim 2, characterized in that, The explosion-proof servo motor (24) is equipped with an encoder (26) that can record the working parameters of the explosion-proof servo motor (24). The encoder (26) is electrically connected to the driver in the electronic control system to realize closed-loop control of the explosion-proof servo motor (24).

4. The electro-hydraulic hybrid driven injection head according to claim 2, characterized in that, The frame (11) is provided with a housing (12), the electric drive system (13) is installed on the housing (12), and the housing of the main reducer (23) and the housing of the right angle reducer (22) are fixedly connected to the housing (12).

5. The electro-hydraulic hybrid-driven injection head according to claim 1, characterized in that, The guiding system (17) includes a guide (30) extending in a predetermined direction, the guide (30) being connected to the top of the frame (11), and a guide cylinder (31) for adjusting the position of the guide (30) being connected between the guide (30) and the frame (11). The guide (30) has a guide channel for accommodating the continuous tube. Along the extension direction of the guide channel, the guide (30) is provided with a plurality of pressure boxes (32) spaced apart. The pressure boxes (32) can press the continuous tube into the guide channel. A pressure box cylinder (33) is connected between the guide (30) and the pressure box (32) for adjusting the clamping force of the pressure box (32).

6. The electro-hydraulic hybrid driven injection head according to claim 5, characterized in that, The modular integrated control valve assembly (19) is connected to a guide control unit, which includes: A guide oil passage (50) is connected between the hydraulic quick-connect panel (40) and the guide cylinder (31) to drive the guide (30) to rise and fall; The pressure box oil circuit (51) is connected between the hydraulic quick-connect panel (40) and the pressure box cylinder (33) to drive the opening and closing of the pressure box (32); The guide oil circuit (50) and the pressure box oil circuit (51) are each equipped with a first electromagnetic reversing valve (52) and a throttle valve (53), and the first electromagnetic reversing valve (52) and the throttle valve (53) are both installed in the modular integrated control valve group (19).

7. The electro-hydraulic hybrid driven injection head according to claim 1, characterized in that, The clamping system (15) includes multiple sets of clamping cylinders (60), and the retraction of the clamping cylinders (60) can drive the chain system (14) to clamp the continuous tube; The tensioning system (16) includes multiple sets of tensioning cylinders (70), and the downward extension of the tensioning cylinders (70) can drive the chain system (14) to be tensioned downward.

8. The electro-hydraulic hybrid-driven injection head according to claim 7, characterized in that, The modular integrated control valve assembly (19) is connected to a chain control unit, which includes: The clamping oil supply line (61) is connected to the hydraulic quick-connect panel (40). The clamping oil supply line (61) is equipped with a first electro-proportional pressure reducing valve (62) and a second electromagnetic reversing valve (63). The second electromagnetic reversing valve (63) is connected to each of the clamping cylinders (60) by a branch line (64). Each of the branch lines (64) is equipped with a third electromagnetic reversing valve (65). The return oil line (66) is clamped and connected between the second solenoid directional valve (63) and the hydraulic quick-connect panel (40); The first electro-proportional pressure reducing valve (62), the second electromagnetic directional valve (63), and the third electromagnetic directional valve (65) are all installed in the modular integrated control valve group (19).

9. The electro-hydraulic hybrid driven injection head according to claim 8, characterized in that, The chain control unit also includes: An emergency clamping oil supply line (67) is connected between the liquid circuit quick-connect panel (40) and each of the branch lines (64).

10. The electro-hydraulic hybrid-driven injection head according to claim 8, characterized in that, Pressure transmitters are provided on the clamping oil supply line (61) and each of the branch lines (64).

11. The electro-hydraulic hybrid-driven injection head according to claim 8, characterized in that, The chain control unit also includes: The tensioning oil line (71) is connected between the hydraulic quick-connect panel (40) and the tensioning cylinder (70). The tensioning oil line (71) is equipped with a second electro-proportional pressure reducing valve (72) and a fourth electromagnetic directional valve (73). The second electro-proportional pressure reducing valve (72) and the fourth solenoid directional valve (73) are both installed in the modular integrated control valve group (19).

12. The electro-hydraulic hybrid-driven injection head according to claim 11, characterized in that, A pressure transmitter is installed on the tensioning oil line (71).

13. The electro-hydraulic hybrid-driven injection head according to claim 1, characterized in that, The lower end of the base (10) is provided with a blowout preventer box (80), and the modular integrated control valve assembly (19) is connected to a blowout preventer box control unit. The blowout preventer box control unit includes: The blowout preventer oil circuit (81) is connected between the quick-connect panel (40) and the blowout preventer (80). The blowout preventer oil circuit (81) is equipped with a third electro-proportional pressure reducing valve (82) and a fifth solenoid directional valve (83). The third electro-proportional pressure reducing valve (82) and the fifth electromagnetic directional valve (83) are both installed in the modular integrated control valve group (19).

14. The electro-hydraulic hybrid-driven injection head according to claim 13, characterized in that, A pressure transmitter is installed on the oil circuit (81) of the blowout preventer.

15. The electro-hydraulic hybrid-driven injection head according to claim 2, characterized in that, The modular integrated control valve assembly (19) is connected to a brake control unit, which includes: The brake oil circuit (90) is connected between the hydraulic quick-connect panel (40) and the brake (25). The brake oil circuit (90) is equipped with a pressure reducing valve (91) and a sixth solenoid directional valve (92). The pressure reducing valve (91) and the sixth electromagnetic directional valve (92) are both installed in the modular integrated control valve group (19).

16. The electro-hydraulic hybrid-driven injection head according to claim 15, characterized in that, A pressure transmitter is provided on the brake oil circuit (90).

17. The electro-hydraulic hybrid-driven injection head according to claim 1, characterized in that, The modular integrated control valve assembly (19) is connected to a lubrication control unit, which includes: A drive lubrication line (100) is connected between the hydraulic quick-connect panel (40) and the electric drive system (13); A chain lubrication line (101) is connected between the hydraulic quick-connect panel (40) and the chain system (14); Both the drive lubrication line (100) and the chain lubrication line (101) are equipped with a seventh electromagnetic directional valve (102), which is installed in the modular integrated control valve group (19).

18. The electro-hydraulic hybrid-driven injection head according to claim 1, characterized in that, The quick-connect panel (40) for the hydraulic circuit is provided with an oil supply interface, an oil return interface, an emergency interface and a lubrication interface. The hydraulic supply system is connected to the oil supply interface, the oil return interface, the emergency interface and the lubrication interface respectively through oil pipes.

19. The electro-hydraulic hybrid-driven injection head according to claim 18, characterized in that, The fluid supply system has a hydraulic power unit, which includes: Hydraulic oil tank (200); An external oil supply line (201) is connected between the hydraulic oil tank (200) and the oil supply interface. Along the flow direction of the oil in the external oil supply line (201), an oil suction filter (204), an electric oil pump (205) and a filter (206) are sequentially provided on the external oil supply line (201). An external return oil line (202) is connected between the return oil interface and the hydraulic oil tank (200), and a return oil filter (207) is provided on the external return oil line (202); An external emergency oil supply line (203) is connected between the hydraulic oil tank (200) and the emergency interface. The external emergency oil supply line (203) is equipped with a manual oil pump (208) and a ball valve (209).

20. The electro-hydraulic hybrid-driven injection head according to claim 19, characterized in that, The fluid supply system has a lubrication power unit, which includes: Lubricating oil tank (300); An external lubrication line (301) is connected between the lubricating oil tank (300) and the lubrication interface, and an electronic oil pump (302) is provided on the external lubrication line (301).

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