Double-rotation feeding system and drilling machine

Abstract

The invention discloses a double-rotation feeding system and a drilling machine, and the double-rotation feeding system comprises a first rotation mechanism connected with a first feeding oil cylinder; the rotary mechanism II is connected with a feeding oil cylinder II; the displacement sensor group is mounted on piston rods of the feeding oil cylinder I and the feeding oil cylinder II and is used for monitoring position changes of the piston rods of the feeding oil cylinder I and the feeding oil cylinder II; the pressure sensor group is mounted on large and small cavities of the feeding oil cylinder I and the feeding oil cylinder II and is used for monitoring the pressure of the large and small cavities of the feeding oil cylinder I and the feeding oil cylinder II; the first adjusting assembly is connected between the first feeding oil cylinder and the oil tank and is configured to adjust the speed and the pressure of the first feeding oil cylinder; the second adjusting assembly is connected between the second feeding oil cylinder and the oil tank and is configured to adjust the speed and the pressure of the second feeding oil cylinder. According to the double-rotation feeding system and the drilling machine, synchronization can be automatically kept in the drilling process, and efficient and automatic drilling is achieved.

Description

Technical Field

[0001] The invention relates to a double rotary feeding system and a drilling rig, belonging to the technical field of drilling rig electro-hydraulic control. Background Art

[0002] Drilling rigs, such as rescue drills, are the main equipment for underground accident rescue and are increasingly used. They mainly rely on the rotation and feed of the power head to achieve drilling construction. Depending on the stratum and construction process, multiple actions are usually required, especially when driven by dual power heads. Since rescue requires every second, the requirements for action response speed and construction efficiency are increasing.

[0003] At present, domestic dual-drive drilling rigs have poor synchronization and cumbersome operation, resulting in low frequency of use and unable to meet the requirements of efficient construction.

[0004] It can be seen that in order to improve the synchronization of the dual-drive drilling rig and solve the above technical problems, a dual rotary feed system and a drilling rig are urgently needed. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a dual rotary feed system and a drilling rig that can automatically maintain synchronization during the drilling process to achieve efficient automatic drilling.

[0006] In order to achieve the above objectives / solve the above technical problems, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a dual rotary feed system, comprising: A rotary mechanism 1 is connected to a feed oil cylinder 1; The second rotary mechanism is connected with the second feed cylinder; A displacement sensor group is installed on the piston rods of the feed cylinder 1 and the feed cylinder 2 to monitor the position changes of the piston rods of the feed cylinder 1 and the feed cylinder 2; A pressure sensor group is installed on the large and small chambers of the feed cylinder 1 and the feed cylinder 2, and is used to monitor the pressure of the large and small chambers of the feed cylinder 1 and the feed cylinder 2; an adjusting assembly 1, connected between the oil feed cylinder 1 and the oil tank, and configured to adjust the speed and pressure of the oil feed cylinder 1; A second regulating assembly connected between the second oil feed cylinder and the oil tank, configured to regulate the speed and pressure of the second oil feed cylinder; and The control system is configured to: determine whether the relative position of feed cylinder one and feed cylinder two and the drilling pressure exceed a preset range based on the position and pressure information obtained by the displacement sensor group and the pressure sensor group; if so, control the adjustment component one and adjustment component two to adjust so that the relative position of feed cylinder one and feed cylinder two and the drilling pressure reach the preset range.

[0007] Furthermore, the regulating component 1 includes a pump 1, a compensator 1, a pressure limiting valve 1, a reversing valve 1 and a control valve group 1, wherein, The oil pumped by the pump 1 from the oil tank passes through the compensator 1 and the reversing valve 1 and enters the control valve group 1; The reversing valve 1 is used to switch the flow direction of the hydraulic oil pumped by the pump 1 into the control valve group 1; The pressure limiting valve 1 is used to adjust the oil inlet pressure of the small chamber when the oil cylinder 1 retracts; The control valve group 1 is connected to the oil feed cylinder 1 and is configured to control the large chamber return oil flow and pressure of the oil feed cylinder 1 and the opening and closing of the small chamber oil circuit.

[0008] Furthermore, the control valve group 1 includes a back pressure valve 1, a flow valve 1, a switch valve 1, a switch valve 2 and a one-way valve 1, wherein, When the feed cylinder 1 extends, the oil pumped by pump 1 passes through compensator 1 and reversing valve 1 and then enters port A of control valve group 1. At this time, switch valve 1 is de-energized, while switch valve 2 is energized. The oil flows from port A of control valve group 1 to the large chamber of the feed cylinder through check valve 1. The oil in the small chamber of the feed cylinder 1 passes through port B of control valve group 1, then through switch valve 2 and then flows back to reversing valve 1 through port B, and finally returns to the oil tank. When the oil feed cylinder retracts, the oil pumped by pump one passes through compensator one and reversing valve one and then enters port B of control valve group one. At this time, switch valve two is energized. After passing through switch valve two, the oil flows from port B of control valve group one to the small chamber of oil feed cylinder one, and the return oil from the large chamber of oil feed cylinder one flows to switch valve one through port A of control valve group one. At this time, switch valve one, flow valve one and back pressure valve one are all energized. After passing through switch valve one, the oil flows into flow valve one, and then passes through back pressure valve one and flows back to the oil tank from port T of control valve group one.

[0009] Furthermore, the second regulating component includes a second pump, a second compensator, a second pressure limiting valve, a second reversing valve and a second control valve group, wherein: The oil pumped by the second pump from the oil tank passes through the second compensator and the second reversing valve and enters the second control valve group; The second reversing valve is used to switch the flow direction of the hydraulic oil pumped by the second pump into the second control valve group; The second pressure limiting valve is used to adjust the oil inlet pressure of the small chamber when the second oil cylinder of the feed oil cylinder retracts; The control valve group 2 is connected to the oil feed cylinder 2 and is configured to control the return oil flow and pressure of the large cavity of the oil feed cylinder 2 and the opening and closing of the small cavity oil circuit.

[0010] Furthermore, the control valve group 2 includes a back pressure valve 2, a flow valve 2, a switch valve 3, a switch valve 4, and a one-way valve 2, wherein: When the feed cylinder 2 extends, the oil pumped by pump 2 passes through compensator 2 and reversing valve 2 and enters port A of control valve group 2. At this time, switch valve 3 is de-energized, and switch valve 4 is energized. The oil flows from port A of control valve group 2 to the large chamber of feed cylinder 2 through check valve 2. The oil in the small chamber of feed cylinder 2 passes through port B of control valve group 2, then through switch valve 4 and port B and flows back to reversing valve 2, and finally returns to the oil tank. When the feed cylinder 2 retracts, the oil pumped by pump 2 passes through compensator 2 and reversing valve 2 and enters port B of control valve group 2. At this time, switch valve 4 is energized. After passing through switch valve 4, the oil flows from port B of control valve group 2 to the small chamber of feed cylinder 2, and the return oil from the large chamber of feed cylinder 2 flows through port A of control valve group to switch valve 3. At this time, switch valve 3, flow valve 2 and back pressure valve 2 are all energized. After passing through switch valve 3, the oil flows into flow valve 2, and then passes through back pressure valve 2 and flows back to the oil tank from port T of control valve group 2.

[0011] Furthermore, the displacement sensor group includes: A displacement sensor 1, mounted on the piston rod of the feed cylinder 1; and Displacement sensor 2 is installed on the piston rod of feed cylinder 2.

[0012] Furthermore, the pressure sensor group includes: Pressure sensor 1 is installed on the large cavity of oil feed cylinder 1; Pressure sensor 2 is installed on the small cavity of oil feed cylinder 1; Pressure sensor three, installed on the large chamber of feed cylinder two; and, Pressure sensor four is installed on the small cavity of feed cylinder two.

[0013] In a second aspect, the present invention provides a drilling rig comprising the dual rotary feed system described in the first aspect.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The dual rotary feed system provided by the present invention can adjust the feed of feed cylinder 1 and feed cylinder 2 according to the position and pressure information obtained by the displacement sensor group and the pressure sensor group during dual rotary feeding, thereby achieving control of the drilling speed and drilling force of the dual rotary mechanism. The control accuracy is high, and construction efficiency is improved while ensuring safety. The drilling rig provided by the present invention, by adapting to the above-mentioned dual rotary feed system, can achieve synchronous drilling during the drilling process, effectively improving the response speed and construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the dual rotary feed system provided by the present invention; Figure 2Schematic diagram of control valve group 1 Figure 3 Schematic diagram of control valve group 2 Figure 4 Schematic diagram of some mechanisms of the drilling rig Among them, 1. Pump 1; 2. Pressure limiting valve 1; 3. Compensator 1; 4. Reversing valve 1; 5. Control valve group 1; 5.1. Back pressure valve 1; 5.2. Flow valve 1; 5.3. On-off valve 1; 5.4. On-off valve 2; 5.5. Check valve 1; 6. Pressure sensor 1; 7. Displacement sensor 1; 8. Feed cylinder 1; 9. Pressure sensor 2; 10. Pressure sensor 3; 11. Feed cylinder 2; 12. Displacement sensor 2; 13. Pressure sensor 4; 14. Control valve group 2; 14.1. Back pressure valve 2; 14.2. Flow valve 2; 14.3. On-off valve 3; 14.4. On-off valve 4; 14.5. Check valve 2; 15. Reversing valve 2; 16. Compensator 2; 17. Pump 2; 18. Pressure limiting valve 2; 19. Oil tank; 20. Drill rig; 21. Slewing mechanism 2; 22. Slewing mechanism 1. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0018] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances. Example 1

[0019] like Figure 1 As shown, this embodiment provides a dual rotary feeding system of the present invention, comprising: A rotary mechanism 22 is connected to a feed oil cylinder 8; The second rotary mechanism 21 is connected to the second feed cylinder 11; The displacement sensor group is installed on the piston rods of the feed cylinder 1 8 and the feed cylinder 2 11 to monitor the position changes of the piston rods of the feed cylinder 1 8 and the feed cylinder 2 11; A pressure sensor group is installed on the large and small chambers of the feed cylinder 1 8 and the feed cylinder 2 11 to monitor the pressure of the large and small chambers of the feed cylinder 1 8 and the feed cylinder 2 11; Adjustment component 1, connected between the oil feed cylinder 18 and the oil tank 19, and configured to adjust the speed and pressure of the oil feed cylinder 18; A second regulating assembly, connected between the second oil feed cylinder 11 and the oil tank 19, configured to regulate the speed and pressure of the second oil feed cylinder 11; and The control system is configured to: determine whether the relative position of feed cylinder 1 8 and feed cylinder 2 11 and the drilling pressure exceed a preset range based on the position and pressure information obtained by the displacement sensor group and the pressure sensor group; if so, control the adjustment component 1 and the adjustment component 2 to adjust so that the relative position of feed cylinder 1 8 and feed cylinder 2 11 and the drilling pressure reach the preset range.

[0020] In the above technical solution, when the rotary mechanism 1 22 and the rotary mechanism 2 21 move, the displacement sensor group installed on the feed cylinder 1 8 and the feed cylinder 2 11 begins to monitor the position information in real time and calculate the relative position of the two rotary mechanisms. The pressure sensor group monitors the pressure of the large and small chambers of the two feed cylinders in real time and calculates the real-time drilling pressure. According to the change in position, if it exceeds the set range, the adjustment component 1 and the adjustment component 2 respectively adjust the speed and pressure of the feed cylinder 1 8 and the feed cylinder 2 11 until the relative position reaches the set range. At the same time, the above-mentioned dual rotary feed system is also equipped with a manual drilling speed adjustment knob. If any abnormality is found, the drilling can be manually taken over to ensure construction efficiency. Example 2

[0021] like Figures 1 to 3 As shown, the dual rotary feeding system provided in this embodiment differs from the dual rotary feeding system provided in the first embodiment in that: The regulating component 1 includes a pump 1, a compensator 3, a pressure limiting valve 2, a reversing valve 4 and a control valve group 5, wherein: The oil pumped by the pump 1 from the oil tank 19 passes through the compensator 3 and the reversing valve 4 and enters the control valve group 5; The reversing valve 4 is used to switch the flow direction of the hydraulic oil pumped by the pump 1 into the control valve group 5; The pressure limiting valve 2 is used to adjust the oil inlet pressure of the small chamber when the oil cylinder 8 is retracted; The control valve group 15 is connected to the oil feed cylinder 18 and is configured to control the large chamber return oil flow and pressure of the oil feed cylinder 18 and the opening and closing of the small chamber oil circuit.

[0022] like Figure 2 As shown, the control valve group 1 5 includes a back pressure valve 1 5.1, a flow valve 1 5.2, a switch valve 1 5.3, a switch valve 2 5.4 and a one-way valve 1 5.5, wherein, When the feed cylinder 8 extends, the oil from pump 1 passes through compensator 3 and reversing valve 4 and enters port A of control valve group 5. At this time, switch valve 5.3 is de-energized, while switch valve 2 5.4 is energized. The oil flows from port A of control valve group 5 to the large chamber of feed cylinder 8 through check valve 5.5. The oil in the small chamber of feed cylinder 8 passes through port B of control valve group 5, then through switch valve 2 5.4 and then flows back to reversing valve 4 through port B, and finally returns to hydraulic oil tank 19. When the feed cylinder 8 retracts, the oil from pump 1 passes through compensator 3 and reversing valve 4 and enters port B of control valve group 5. At this time, switch valve 2 5.4 is energized. After passing through switch valve 2 5.4, the oil flows from port B of control valve group 5 to the small chamber of feed cylinder 8. The return oil from the large chamber of feed cylinder 8 flows through port A of control valve group to switch valve 5.3. At this time, switch valve 5.3, flow valve 5.2 and back pressure valve 5.1 are all energized. After passing through switch valve 5.3, the oil flows into flow valve 5.2, and then passes through back pressure valve 5.1 and flows back to hydraulic oil tank 19 from port T of control valve group 5.

[0023] The setting of switch valve 2 5.4 can not only ensure that drilling pressure adjustment is not affected during drilling, but also ensure that the oil in the small chamber of the cylinder will not leak during transportation. like Figure 1 As shown, the regulating assembly 2 includes a pump 2 17, a compensator 2 16, a pressure limiting valve 2 18, a reversing valve 2 15 and a control valve group 2 14, wherein: The oil pumped by the pump 2 17 from the oil tank 19 passes through the compensator 2 16 and the reversing valve 2 15 and enters the control valve group 2 14; The second reversing valve 15 is used to switch the flow direction of the hydraulic oil pumped by the second pump 17 into the second control valve group 14; The pressure limiting valve 2 18 is used to adjust the oil inlet pressure of the small chamber when the oil cylinder 2 11 is retracted; The control valve group 2 14 is connected to the oil feed cylinder 2 11 and is configured to control the return oil flow and pressure of the large cavity of the oil feed cylinder 2 11 and the opening and closing of the small cavity oil circuit.

[0024] like Figure 3 As shown, the control valve group 2 14 includes a back pressure valve 2 14.1, a flow valve 2 14.2, a switch valve 3 14.3, a switch valve 4 14.4, and a check valve 2 14.5, wherein: When the feed cylinder 11 extends, the oil from the pump 17 passes through the compensator 16 and the reversing valve 15 and enters the A port of the control valve group 14. At this time, the on-off valve 14.3 is de-energized, and the on-off valve 14.4 is energized. The oil flows from the A port of the control valve group 14 to the large chamber of the feed cylinder 11 through the one-way valve 14.5. The oil in the small chamber of the feed cylinder 11 passes through the B port of the control valve group 14, passes through the on-off valve 14.4, and then flows back to the reversing valve 15 through the B port, and finally returns to the hydraulic oil tank 19. When the feed cylinder 11 retracts, the oil from pump 17 passes through compensator 16 and reversing valve 15 and enters port B of control valve group 14. At this time, switch valve 4 14.4 is energized. After passing through switch valve 4 14.4, the oil flows from port B of control valve group 14 to the small chamber of feed cylinder 11. The return oil from the large chamber of feed cylinder 11 flows through port A of control valve group to switch valve 3 14.3. At this time, switch valve 3 14.3, flow valve 2 14.2 and back pressure valve 2 14.1 are all energized. After passing through switch valve 3 14.3, the oil flows into flow valve 2 14.2, and then passes through back pressure valve 2 14.1 and flows back to the hydraulic oil tank 19 from port T of control valve group 2 14.

[0025] The setting of the switch valve 4 14.4 can not only ensure that the drilling pressure adjustment is not affected during the drilling process, but also ensure that the oil in the small chamber of the cylinder will not leak during transportation.

[0026] The displacement sensor group includes: A displacement sensor 7 is mounted on the piston rod of the feed cylinder 8; and The displacement sensor 2 12 is installed on the piston rod of the feed cylinder 2 11.

[0027] Furthermore, the pressure sensor group includes: Pressure sensor 6 is installed on the large cavity of the oil feeding cylinder 8; Pressure sensor 2 9, installed on the small cavity of the oil feeding cylinder 1 8; Pressure sensor 3 10, mounted on the large chamber of feed cylinder 2 11; and, Pressure sensor four 13 is installed on the small cavity of feed cylinder two 11.

[0028] The control system can be implemented through PLC, which can receive signals from the displacement sensor group and the pressure sensor group, process them through preset program logic, and then output control signals to the adjustment component to achieve speed and pressure adjustment of the feed cylinder 1 8 and the feed cylinder 2 11.

[0029] The following takes the feed cylinder 1 8 as an example to specifically explain the adjustment method of speed and pressure during actual drilling (the feed cylinder 2 11 is the same as the feed cylinder 1 8): During pressurized drilling, high-pressure oil from Pump 1 passes through Regulating Assembly 1 and enters the small chamber of Feed Cylinder 8. At this point, On / Off Valve 5.3 and On / Off Valve 2 5.4 in Control Valve Group 5 are open, and Flow Valve 5.5 and Back Pressure Valve 5.1 are both at their maximum openings. After drilling begins, based on feedback from Displacement Sensor 7 and the pressure sensor group, if the drilling speed is too fast, the set current of Reversing Valve 4 is reduced to reduce the amount of oil entering the small chamber of Feed Cylinder 8. Simultaneously, the current of Pressure Limiting Valve 2 is adjusted to reduce the oil pressure output by Pump 1. Since On / Off Valve 2 5.4 is open, the reduced pump pressure will reduce the pressure in the small chamber of Feed Cylinder 8. At this point, the speed of Feed Cylinder 8 will decrease until it reaches the set range, and the current will stabilize. If the drilling speed is too slow, the set current of Reversing Valve 4 is increased, and the output pressure of Pump 1 is increased through Pressure Limiting Valve 2 to accelerate the speed of Feed Cylinder 8 until it returns to the set range.

[0030] During decompression drilling, according to the preset speed, since the weight of the drill tool has met the maximum bit pressure requirement during decompression drilling, the reversing valve-4 and the pressure-limiting valve-2 are given a fixed current to meet the oil replenishment required for the small cavity during the drilling process. During the drilling process, if the sensor feedback indicates that the drilling speed is too high, the current of the flow valve-5.2 is adjusted to reduce the opening of the flow valve-5.2, and the oil return volume of the large cavity of the cylinder will be reduced. At the same time, the control system will synchronously analyze whether the bit pressure has changed. If the bit pressure is lower than the set range, the current of the back pressure valve-5.1 is adjusted to increase the opening of the back pressure valve-5.1, reduce the pressure in the large cavity of the cylinder, and increase the bit pressure accordingly. Through the coordinated adjustment of the flow valve-5.2 and the back pressure valve-5.1, the speed reaches the set range. If the sensor feedback indicates that the drilling speed is too low, the current of flow valve 5.2 is adjusted to increase the opening of flow valve 5.2, which will increase the amount of oil returning from the large chamber of the oil cylinder. At the same time, the control system will synchronously analyze whether the drilling pressure has changed. If the drilling pressure is higher than the set range, the current of back pressure valve 5.1 is adjusted to reduce the opening of back pressure valve 5.1, increasing the pressure in the large chamber of the oil cylinder and reducing the drilling pressure accordingly. Through the coordinated adjustment of flow valve 5.2 and back pressure valve 5.1, the speed reaches the set range.

[0031] When a drill is stuck or other situations require constant lifting force and speed, the high-pressure oil of Pump 8 flows through Reversing Valve 4 to Port A of Control Valve Group 5, and is divided into two paths after passing through Check Valve 5.5. One path enters the large chamber of Feed Cylinder 8, and the other path flows back to the oil tank after passing through Switch Valve 5.3, Flow Valve 5.2 and Back Pressure Valve 5.1. Feed Cylinder 8 is extended, and the oil in the small chamber of the cylinder flows back to the oil tank after passing through Switch Valve 2 5.4 and Reversing Valve 4. At this time, Switch Valve 5.3, Switch Valve 2 5.4 and Flow Valve 5.2 are all in the fully open state. By simultaneously adjusting the current values of Reversing Valve 4 and Back Pressure Valve 5.1, the extension speed of Feed Cylinder 8 and the pressure of the large chamber of the cylinder are kept within the set range, achieving safe and stable accident relief. Example 3

[0032] This embodiment provides a drilling rig, including a dual rotary feed system provided in the first or second embodiment, such as Figure 4 As shown, the drill rig 20 in the drilling rig is in contact with the ground, the feed cylinder 1 8 and the feed cylinder 2 11 are fixed on the drill rig 20, the feed cylinder 1 8 is connected to the rotary mechanism 1 22, the rotary mechanism 1 22 can move up and down along the drill rig 20, the feed cylinder 2 11 is connected to the rotary mechanism 2 21, the rotary mechanism 2 21 can move up and down along the drill rig 20. When in use, after the casing and drill rod are installed on the drilling rig, the relative position range of the double rotary mechanism is set according to the actual drill tool length, and drilling begins. After setting the speed of the rotary mechanism, the two feed handles are operated. At this time, the two rotary mechanisms move downward at the same time, so as to perform synchronous drilling during the drilling process through the double rotary feed system provided by Example 1 or Example 2.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dual rotary feed system, characterized in that: include: A rotary mechanism (22) is connected to a feed oil cylinder (8); The second rotary mechanism (21) is connected to the second feed cylinder (11); A displacement sensor group is installed on the piston rods of the feed cylinder 1 (8) and the feed cylinder 2 (11) to monitor the position changes of the piston rods of the feed cylinder 1 (8) and the feed cylinder 2 (11); A pressure sensor group is installed on the large and small chambers of the feed cylinder 1 (8) and the feed cylinder 2 (11) to monitor the pressure of the large and small chambers of the feed cylinder 1 (8) and the feed cylinder 2 (11); An adjusting component 1, connected between the oil feed cylinder 1 (8) and the oil tank (19), and configured to adjust the speed and pressure of the oil feed cylinder 1 (8); A second regulating assembly connected between the second oil feed cylinder (11) and the oil tank (19), configured to regulate the speed and pressure of the second oil feed cylinder (11); and, The control system is configured to: determine whether the relative position of the feed oil cylinder 1 (8) and the feed oil cylinder 2 (11) and the drilling pressure exceed a preset range based on the position and pressure information obtained by the displacement sensor group and the pressure sensor group; if so, control the adjustment component 1 and the adjustment component 2 to adjust so that the relative position of the feed oil cylinder 1 (8) and the feed oil cylinder 2 (11) and the drilling pressure reach the preset range.

2. The dual rotary feed system according to claim 1, characterized in that: The regulating component 1 includes a pump 1 (1), a compensator 1 (3), a pressure limiting valve 1 (2), a reversing valve 1 (4) and a control valve group 1 (5), wherein: The oil pumped by the pump 1 (1) from the oil tank (19) passes through the compensator 1 (3) and the reversing valve 1 (4) and enters the control valve group 1 (5); The reversing valve 1 (4) is used to switch the flow direction of the hydraulic oil pumped by the pump 1 (1) into the control valve group 1 (5); The pressure limiting valve 1 (2) is used to adjust the oil inlet pressure of the small chamber when the oil cylinder 1 (8) is retracted; The control valve group 1 (5) is connected to the oil feed cylinder 1 (8) and is configured to control the return oil flow and pressure of the large cavity of the oil feed cylinder 1 (8) and the opening and closing of the small cavity oil circuit.

3. The dual rotary feed system according to claim 2, characterized in that: The control valve group 1 (5) includes a back pressure valve 1 (5.1), a flow valve 1 (5.2), a switch valve 1 (5.3), a switch valve 2 (5.4) and a one-way valve 1 (5.5), wherein: When the feed cylinder 1 (8) extends, the oil pumped by the pump 1 (1) passes through the compensator 1 (3) and the reversing valve 1 (4) and enters the A port of the control valve group 1 (5). At this time, the switch valve 1 (5.3) is not energized, and the switch valve 2 (5.4) is energized. The oil flows from the A port of the control valve group 1 (5) to the large cavity of the feed cylinder 1 (8) through the one-way valve 1 (5.5). The oil in the small cavity of the feed cylinder 1 (8) passes through the B port of the control valve group 1 (5), passes through the switch valve 2 (5.4), and then flows back to the reversing valve 1 (4) through the B port, and finally returns to the oil tank (19). When the feed cylinder 1 (8) retracts, the oil pumped by pump 1 (1) passes through compensator 1 (3) and reversing valve 1 (4) and enters port B of control valve group 1 (5). At this time, switch valve 2 (5.4) is in the energized state. After passing through switch valve 2 (5.4), the oil flows from port B of control valve group 1 (5) to the small cavity of feed cylinder 1 (8). The return oil from the large cavity of feed cylinder 1 (8) flows through port A of control valve group to switch valve 1 (5.3). At this time, switch valve 1 (5.3), flow valve 1 (5.2) and back pressure valve 1 (5.1) are all energized. After passing through switch valve 1 (5.3), the oil flows into flow valve 1 (5.2), and then flows through back pressure valve 1 (5.1) and returns to the oil tank (19) from port T of control valve group 1 (5).

4. The dual rotary feed system according to claim 1, characterized in that: The regulating assembly 2 includes a pump 2 (17), a compensator 2 (16), a pressure limiting valve 2 (18), a reversing valve 2 (15) and a control valve group 2 (14), wherein: The oil pumped by the pump 2 (17) from the oil tank (19) passes through the compensator 2 (16) and the reversing valve 2 (15) and enters the control valve group 2 (14); The reversing valve 2 (15) is used to switch the flow direction of the hydraulic oil pumped by the pump 2 (17) into the control valve group 2 (14); The second pressure limiting valve (18) is used to adjust the oil inlet pressure of the small chamber when the oil cylinder of the second oil cylinder (11) is retracted; The control valve group 2 (14) is connected to the feed oil cylinder 2 (11) and is configured to control the return oil flow and pressure of the large cavity of the feed oil cylinder 2 (11) and the opening and closing of the small cavity oil circuit.

5. The dual rotary feed system according to claim 4, characterized in that: The control valve group 2 (14) includes a back pressure valve 2 (14.1), a flow valve 2 (14.2), a switch valve 3 (14.3), a switch valve 4 (14.4), and a one-way valve 2 (14.5), wherein: When the feed cylinder 2 (11) extends, the oil pumped by pump 2 (17) passes through compensator 2 (16) and reversing valve 2 (15) and then enters port A of control valve group 2 (14). At this time, switch valve 3 (14.3) is not energized, and switch valve 4 (14.4) is energized. The oil flows from port A of control valve group 2 (14) to the large chamber of feed cylinder 2 (11) through check valve 2 (14.5). The oil in the small chamber of feed cylinder 2 (11) passes through port B of control valve group 2 (14), then passes through switch valve 4 (14.4) and then flows back to reversing valve 2 (15) through port B, and finally returns to the oil tank (19). When the feed cylinder 2 (11) retracts, the oil pumped by pump 2 (17) passes through compensator 2 (16) and reversing valve 2 (15) and then enters port B of control valve group 2 (14). At this time, switch valve 4 (14.4) is in the energized state. After passing through switch valve 4 (14.4), the oil flows from port B of control valve group 2 (14) to the small chamber of feed cylinder 2 (11). The return oil from the large chamber of feed cylinder 2 (11) flows through port A of control valve group to switch valve 3 (14.3). At this time, switch valve 3 (14.3), flow valve 2 (14.2) and back pressure valve 2 (14.1) are all energized. After passing through switch valve 3 (14.3), the oil flows into flow valve 2 (14.2) and then flows through back pressure valve 2 (14.1) and then flows back to the oil tank (19) from port T of control valve group 2 (14).

6. The dual rotary feed system according to claim 1, characterized in that: The displacement sensor group includes: A displacement sensor (7) mounted on the piston rod of a feed cylinder (8); and The second displacement sensor (12) is mounted on the piston rod of the second feed cylinder (11).

7. The dual rotary feed system according to claim 1, characterized in that: The pressure sensor group includes: A pressure sensor (6) is mounted on the large cavity of the oil feed cylinder (8); Pressure sensor 2 (9), mounted on the small cavity of feed cylinder 1 (8); Pressure sensor three (10), mounted on the large chamber of feed cylinder two (11); and, Pressure sensor four (13) is installed on the small cavity of feed cylinder two (11).

8. A drilling rig, characterized in that: The dual rotary feed system comprises the dual rotary feed system according to any one of claims 1 to 7.

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