Hydraulic down-the-hole hammer control system and lead drill

Abstract

The application provides a hydraulic down-the-hole hammer control system and an advanced drill rig. The hydraulic down-the-hole hammer control system comprises a hydraulic pump station and a high-pressure water subsystem. The high-pressure water subsystem comprises a water tank, a liquid-driven high-pressure water pump, a water pump pressure control valve and a hydraulic down-the-hole hammer. The water tank is connected with the hydraulic down-the-hole hammer through a water inlet pipeline. The liquid-driven high-pressure water pump is arranged on the water inlet pipeline and located between the water tank and the hydraulic down-the-hole hammer. The liquid-driven high-pressure water pump is also connected with a first hydraulic oil output pipeline through a first output sub-pipeline. The first output sub-pipeline is provided with the water pump pressure control valve. The water pump pressure control valve is located between the hydraulic pump station and the liquid-driven high-pressure water pump. The liquid-driven high-pressure water pump is also connected with a hydraulic oil return pipeline through a first return sub-pipeline. The application can control the amount of hydraulic oil entering the liquid-driven high-pressure water pump, so that the impact pressure of the hydraulic down-the-hole hammer can be adapted to different strata, and the hole forming quality under complex strata is better.

Description

Technical Field

[0001] This application relates to advanced drilling construction technology, and more particularly to a hydraulic down-the-hole hammer control system and an advanced drilling rig. Background Technology

[0002] Advanced drilling falls under the field of construction exploration. Specifically, it involves conducting exploratory borehole exploration when the foundation pile reaches the bearing layer in order to determine whether there are any weak interlayers, cavities, or other adverse geological conditions within a certain range below the bearing layer.

[0003] In related technical solutions, advanced drilling typically employs either hydraulic down-the-hole hammers or pneumatic down-the-hole hammers. Pneumatic down-the-hole hammers utilize high-pressure gas to drive a piston in impact motion, thereby propelling the drill bit to drill. However, pneumatic down-the-hole hammers have limited drilling depth, and the gas expelled from the borehole carries a large amount of dust and debris, causing significant damage to the working environment. Hydraulic down-the-hole hammers, on the other hand, not only drill to greater depths but are also suitable for drilling deep holes and in water-rich geological conditions, resulting in higher hole quality.

[0004] However, current hydraulic down-the-hole hammer technology can only be used for drilling in single formations, and the hole quality is poor when encountering complex formations. Summary of the Invention

[0005] In order to overcome the above-mentioned defects in related technologies, the purpose of this application is to provide a hydraulic down-the-hole hammer control system and an advanced drilling rig. This application can adjust the impact pressure, propulsion pressure and rotation pressure of the hydraulic down-the-hole hammer according to the formation conditions, so that the hydraulic down-the-hole hammer can meet the drilling requirements in complex formations and achieve better hole quality in complex formations.

[0006] On one hand, this application provides a hydraulic down-the-hole hammer control system, comprising:

[0007] The hydraulic pump station is connected to the first hydraulic oil output pipeline and the hydraulic oil return pipeline;

[0008] A high-pressure water subsystem includes a water tank, a hydraulically driven high-pressure water pump, a water pump pressure control valve, and a hydraulic down-the-hole hammer. The water tank and the hydraulic down-the-hole hammer are connected via an inlet pipe. The hydraulically driven high-pressure water pump is installed on the inlet pipe and located between the water tank and the hydraulic down-the-hole hammer. The hydraulically driven high-pressure water pump is also connected to a first hydraulic oil output pipe via a first output sub-pipe. A water pump pressure control valve is installed on the first output sub-pipe and is located between the hydraulic pump station and the hydraulically driven high-pressure water pump. The hydraulically driven high-pressure water pump is also connected to the hydraulic oil return pipe via a first return sub-pipe.

[0009] In one possible implementation, the water inlet pipe is further equipped with a pressure reducing valve, a ball valve, an inlet water pressure sensor, and a high-pressure water pressure sensor;

[0010] The pressure reducing valve, ball valve, and inlet pressure sensor are sequentially arranged between the water tank and the liquid-driven high-pressure water pump. The pressure reducing valve is located close to the water tank, and the ball valve is also connected to an air source.

[0011] The high-pressure water pressure sensor is located between the liquid-driven high-pressure water pump and the hydraulic down-the-hole hammer.

[0012] The first output sub-pipe is also equipped with a drive pressure sensor, which is located between the water pump pressure control valve and the liquid-driven high-pressure water pump.

[0013] In one possible implementation, a drilling control subsystem is also included, wherein the hydraulic pump station is further connected to a second hydraulic oil output pipeline; the drilling control subsystem includes a pilot proportional control valve, a propulsion fluid control directional valve, a propulsion motor, a rotary fluid control directional valve, and a rotary motor; the pilot proportional control valve is connected to the second hydraulic oil output pipeline via a second output sub-pipeline, and the pilot proportional control valve includes a first sub-control valve, a second sub-control valve, a third sub-control valve, and a fourth sub-control valve, wherein the first sub-control valve is connected to the first end of the propulsion fluid control directional valve, the second sub-control valve is connected to the second end of the propulsion fluid control directional valve, and the third sub-control valve is connected to the second end of the propulsion fluid control directional valve, and the fourth sub-control valve is connected to the third sub-control valve, the fifth sub-control valve is connected to the fourth sub-control valve, the sixth sub-control valve is connected to the fifth sub-control valve, the seventh sub-control valve is connected to the fifth sub-control valve, the eleventh sub-control valve is connected to the sixth sub-control valve, the eleventh sub-control valve is connected to the eleventh ... The valve is connected to the first end of the rotary fluid control directional valve, and the fourth sub-control valve is connected to the second end of the rotary fluid control directional valve; the input end of the propulsion fluid control directional valve is connected to the second hydraulic oil output line through the third output sub-line, the output end of the propulsion fluid control directional valve is connected to the propulsion motor, and the propulsion motor is connected to the hydraulic oil return line through the second return sub-line; the input end of the rotary fluid control directional valve is connected to the second hydraulic oil output line through the third output sub-line, the output end of the rotary fluid control directional valve is connected to the rotary motor, and the rotary motor is connected to the hydraulic oil return line through the second return sub-line.

[0014] In one possible implementation, the drilling control subsystem further includes a propulsion proportional pressure regulating valve, a propulsion pressure limiting valve, a retraction pressure limiting valve, and a third return sub-pipeline;

[0015] The first end of the propulsion proportional pressure regulating valve and the first end of the propulsion pressure limiting valve are both connected in parallel to the first end of the propulsion motor. The first end of the retraction pressure limiting valve is connected in parallel to the second end of the propulsion motor. The first ends of the propulsion proportional pressure regulating valve, the first ends of the propulsion pressure limiting valve, and the first ends of the retraction pressure limiting valve are all connected to the output end of the propulsion fluid control reversing valve.

[0016] The second end of the propulsion proportional pressure regulating valve, the second end of the propulsion pressure limiting valve, and the second end of the retraction pressure limiting valve are all connected to the hydraulic oil return pipeline through the third return sub-pipeline.

[0017] In one possible implementation, the drilling control subsystem further includes a forward pressure relief valve and a reverse pressure relief valve;

[0018] The first end of the forward pressure relief valve is connected in parallel with the first end of the rotary motor, the first end of the reverse pressure relief valve is connected in parallel with the second end of the rotary motor, and the first ends of both the forward pressure relief valve and the reverse pressure relief valve are connected to the output end of the rotary hydraulic control directional valve.

[0019] The second end of the forward pressure relief valve and the second end of the reverse pressure relief valve are both connected to the hydraulic oil return pipeline through the third return sub-pipeline.

[0020] In one possible implementation, the drilling control subsystem further includes a rotary pressure sensor and an anti-jamming valve. The rotary pressure sensor is disposed between the output end of the rotary fluid control directional valve and the first end of the rotary motor. The first end of the anti-jamming valve is connected in parallel with the first end of the propulsion motor. The second end of the anti-jamming valve is connected to the third return sub-pipeline. The third end of the anti-jamming valve is connected between the rotary pressure sensor and the rotary motor through the rotary fluid pipeline.

[0021] In one possible implementation, the rotary motor includes a first rotary rotor motor and a second rotary rotor motor connected in parallel, and a reversing valve is provided between the second rotary rotor motor and the rotary fluid control reversing valve.

[0022] In one possible implementation, an auxiliary control subsystem is also included, which includes an auxiliary cylinder and an auxiliary motion control valve. The auxiliary cylinder is connected to the first hydraulic oil output line and the hydraulic oil return line through the auxiliary motion control valve.

[0023] In one possible implementation, the auxiliary cylinder includes a drill arm moving cylinder, a front clamping cylinder, a rear clamping cylinder, a pitching cylinder, a compensation cylinder, or a tilting cylinder.

[0024] On the other hand, this application provides an advanced drilling rig, including a hydraulic down-the-hole hammer control system as described in any of the above.

[0025] This application provides a hydraulic down-the-hole hammer control system and an advanced drilling rig. The hydraulic down-the-hole hammer control system includes a hydraulic pump station and a high-pressure water subsystem. The hydraulic pump station is connected to a first hydraulic oil output pipeline, a second hydraulic oil output pipeline, and a hydraulic oil return pipeline. The high-pressure water subsystem includes a water tank, a hydraulically driven high-pressure water pump, a water pump pressure control valve, and a hydraulic down-the-hole hammer. The water tank and the hydraulic down-the-hole hammer are connected through an inlet pipeline. The hydraulically driven high-pressure water pump is installed on the inlet pipeline and is located between the water tank and the hydraulic down-the-hole hammer. The hydraulically driven high-pressure water pump is also connected to the first hydraulic oil output pipeline through a first output sub-pipeline. A water pump pressure control valve is installed on the first output sub-pipeline and is located between the hydraulic pump station and the hydraulically driven high-pressure water pump. The hydraulically driven high-pressure water pump is also connected to the hydraulic oil return pipeline through a first return sub-pipeline. This application utilizes a hydraulically driven high-pressure water pump to pressurize low-pressure water in a water tank into high-pressure water, thereby providing impact pressure for the hydraulic down-the-hole hammer. A directional control valve for the propulsion fluid controls the direction of hydraulic oil entering the propulsion motor, thus controlling the forward or backward movement of the hydraulic down-the-hole hammer. Similarly, a directional control valve for the rotary fluid controls the direction of hydraulic oil entering the rotary motor, thus controlling the rotation of the hydraulic down-the-hole hammer. Because a water pump pressure control valve is installed on the first hydraulic oil output pipeline, the amount of hydraulic oil entering the hydraulically driven high-pressure water pump can be controlled, thereby adjusting the pressure of the high-pressure water output by the pump. This allows the impact pressure of the hydraulic down-the-hole hammer to be adapted to different formations, resulting in better hole-forming quality in complex formations. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the liquid flow direction of a hydraulic down-the-hole hammer control system provided in an embodiment of this application under the first operating condition;

[0028] Figure 2 A schematic diagram of the liquid flow direction of a hydraulic down-the-hole hammer control system under a second operating condition, provided in an embodiment of this application;

[0029] Figure 3 A schematic diagram of the liquid flow direction of a hydraulic down-the-hole hammer control system provided in an embodiment of this application under a third operating condition;

[0030] Figure 4 A schematic diagram of the liquid flow direction in the fourth operating condition of a hydraulic down-the-hole hammer control system provided in an embodiment of this application;

[0031] Figure 5A schematic diagram of the liquid flow direction in the fifth operating condition of a hydraulic down-the-hole hammer control system provided in an embodiment of this application.

[0032] Figure label:

[0033] 100 - Hydraulic pump station; 110 - First hydraulic pump; 120 - Second hydraulic pump;

[0034] 200-High-pressure water subsystem; 201-Water tank; 202-Hydraulic high-pressure water pump; 203-Pump pressure control valve; 204-Hydraulic down-the-hole hammer; 205-Pressure reducing valve; 206-Ball valve; 207-Inlet pressure sensor; 208-High-pressure water pressure sensor; 209-Air source; 211-Drive pressure sensor; 210-Inlet pipeline; 220-First output sub-pipeline; 230-First return sub-pipeline;

[0035] 300-Drilling control subsystem; 301-Pilot proportional control valve; 3011-First sub-control valve; 3012-Second sub-control valve; 3013-Third sub-control valve; 3014-Fourth sub-control valve; 302-Propellant fluid control directional valve; 303-Propellant motor; 304-Rotary fluid control directional valve; 305-Rotary motor; 3051-First rotary rotor motor; 3052-Second rotary rotor motor; 306-Propellant proportional pressure regulating valve; 307-Propellant pressure limiting valve; 308-Reverse pressure limiting valve; 309-Forward pressure limiting valve; 311-Reverse pressure limiting valve; 312-Rotary pressure sensor; 313-Anti-jamming valve; 314-Reversing switching valve; 310-Second output sub-pipeline; 320-Third output sub-pipeline; 330-Second return sub-pipeline; 340-Third return sub-pipeline; 350-Rotary fluid pipeline;

[0036] 410 - First hydraulic oil output line; 420 - Second hydraulic oil output line; 430 - Hydraulic oil return line;

[0037] 500 - Auxiliary control subsystem; 501 - Auxiliary motion control valve; 502 - Drill arm moving cylinder; 503 - Front clamping cylinder; 504 - Rear clamping cylinder; 505 - Pitch cylinder; 506 - Compensation cylinder; 507 - Tilting cylinder. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0039] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] As described in the background section, hydraulic down-the-hole hammers in related technologies are only suitable for drilling in single formations, and the hole quality is poor when encountering complex formations. This problem arises because the impact pressure of the hydraulic down-the-hole hammer in related technologies cannot be adjusted, limiting its drilling to a fixed pressure. When the formation environment changes, the constant impact pressure of the hydraulic down-the-hole hammer inevitably leads to changes in drilling speed and other parameters, ultimately resulting in reduced hole quality.

[0041] In view of this, the present application aims to provide a hydraulic down-the-hole hammer control system. By setting a water pump pressure control valve between the hydraulic pump station and the hydraulically driven high-pressure water pump, the amount of hydraulic oil entering the hydraulically driven high-pressure water pump can be controlled to adjust the pressure of the high-pressure water output by the hydraulically driven high-pressure water pump, so that the impact pressure of the hydraulic down-the-hole hammer can be adapted to different formations, and the hole formation quality is better in complex formations.

[0042] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can gain a more detailed understanding of the contents of this application.

[0043] Figure 1 A schematic diagram of the liquid flow direction under the first working condition of the hydraulic down-the-hole hammer control system provided in an embodiment of this application.

[0044] Please refer to Figure 1 This embodiment provides a hydraulic down-the-hole hammer control system, including:

[0045] Hydraulic pump station 100 is connected to the first hydraulic oil output pipeline 410, the second hydraulic oil output pipeline 420 and the hydraulic oil return pipeline 430.

[0046] Specifically, the hydraulic pump station 100 may include a first hydraulic pump 110 and a second hydraulic pump 120. The first hydraulic pump 110 is connected to a first hydraulic oil output pipeline 410 to output hydraulic oil through the first hydraulic oil output pipeline 410. The second hydraulic pump 120 is connected to a second hydraulic oil output pipeline 420 to output hydraulic oil through the second hydraulic oil output pipeline 420. The hydraulic oil return pipeline 430 is connected to both the first hydraulic pump 110 and the second hydraulic pump 120 to send the returned hydraulic oil back into the first hydraulic pump 110 and the second hydraulic pump 120, thereby realizing the circulation of hydraulic oil within the system.

[0047] The high-pressure water subsystem 200 includes a water tank 201, a hydraulically driven high-pressure water pump 202, a water pump pressure control valve 203, and a hydraulic down-the-hole hammer 204.

[0048] Specifically, the water tank 201 and the hydraulic down-the-hole hammer 204 are connected via an inlet pipe 210. A hydraulically driven high-pressure water pump 202 is installed on the inlet pipe 210 and located between the water tank 201 and the hydraulic down-the-hole hammer 204. Optionally, multiple hydraulically driven high-pressure water pumps 202 may be provided. Figure 1 (Three are shown in the image), and the specific number can be selected as needed.

[0049] The hydraulically driven high-pressure water pump 202 is also connected to the first hydraulic oil output pipeline 410 via the first output sub-pipeline 220, and to the hydraulic oil return pipeline 430 via the first return sub-pipeline 230. In this way, the hydraulic oil flowing from the first hydraulic pump 110 can enter the hydraulically driven high-pressure water pump 202, and the low-pressure water in the water tank 201 can also enter the hydraulically driven high-pressure water pump 202 via the inlet pipeline 210. Under the action of the hydraulically driven high-pressure water pump 202, the low-pressure water becomes high-pressure water, which is then delivered to the hydraulic down-the-hole hammer 204 to provide impact pressure. After the hydraulic oil completes its work in the hydraulically driven high-pressure water pump 202, it can flow back to the hydraulic pump station 100.

[0050] In this embodiment, a water pump pressure control valve 203 is provided on the first output sub-pipeline 220, and the water pump pressure control valve 203 is located between the hydraulic pump station 100 and the hydraulically driven high-pressure water pump 202. Optionally, multiple water pump pressure control valves 203 may be provided in this embodiment. Figure 1 (Three are shown in the figure), with multiple water pump pressure control valves 203 corresponding one-to-one with multiple liquid-driven high-pressure water pumps 202.

[0051] In this embodiment, by changing the opening of the water pump pressure control valve 203, the amount of hydraulic oil entering the hydraulic high-pressure water pump 202 can be controlled, thereby adjusting the pressure of the high-pressure water output by the hydraulic high-pressure water pump 202, so that the impact pressure of the hydraulic down-the-hole hammer 204 can be adapted to different formations, resulting in better hole formation quality in complex formations.

[0052] Please continue to refer to Figure 1 In one possible implementation, the water inlet pipe 210 of this embodiment is also provided with a pressure reducing valve 205, a ball valve 206, a water inlet pressure sensor 207 and a high-pressure water pressure sensor 208.

[0053] Specifically, a pressure reducing valve 205, a ball valve 206, and an inlet pressure sensor 207 are sequentially arranged between the water tank 201 and the hydraulically driven high-pressure water pump 202. The pressure reducing valve 205, located close to the water tank 201, can adjust the water pressure at the inlet of the hydraulically driven high-pressure water pump 202. The opening degree of the ball valve 206 controls the inlet flow rate of the hydraulically driven high-pressure water pump 202. The ball valve 206 is also connected to an air source 209, which controls the opening degree of the ball valve 206; that is, the ball valve 206 in this embodiment can be a pneumatic ball valve.

[0054] The high-pressure water pressure sensor 208 is installed between the hydraulic high-pressure water pump 202 and the hydraulic down-the-hole hammer 204. It can monitor the high-pressure water pressure entering the hydraulic down-the-hole hammer 204 and thus determine the current impact pressure of the hydraulic down-the-hole hammer 204.

[0055] Furthermore, a drive pressure sensor 211 is also provided on the first output sub-pipeline 220. The drive pressure sensor 211 is located between the water pump pressure control valve 203 and the hydraulically driven high-pressure water pump 202. The drive pressure sensor 211 can monitor the pressure of the hydraulic oil at the inlet of the hydraulically driven high-pressure water pump 202. The number of drive pressure sensors 211 is the same as the number of hydraulically driven high-pressure water pumps 202 and water pump pressure control valves 203.

[0056] Please continue to refer to Figure 1 In order to better control the movement of the hydraulic down-the-hole hammer 204, this embodiment also includes a drilling control subsystem 300, which includes a pilot proportional control valve 301, a propulsion fluid control directional valve 302, a propulsion motor 303, a rotary fluid control directional valve 304, and a rotary motor 305.

[0057] Specifically, the pilot proportional control valve 301 is connected to the second hydraulic oil output line 420 via the second output sub-line 310. The pilot proportional control valve 301 includes a first sub-control valve 3011, a second sub-control valve 3012, a third sub-control valve 3013, and a fourth sub-control valve 3014. The first sub-control valve 3011 is connected to the first end of the propellant fluid control directional valve 302, the second sub-control valve 3012 is connected to the second end of the propellant fluid control directional valve 302, the third sub-control valve 3013 is connected to the first end of the rotary fluid control directional valve 304, and the fourth sub-control valve 3014 is connected to the second end of the rotary fluid control directional valve 304. It can be understood that the pilot proportional control valve 301 can connect different sub-control valves via hydraulic oil, thereby controlling the flow direction of hydraulic oil in the propellant fluid control directional valve 302 and the rotary fluid control directional valve 304, and thus controlling the direction of rotation of the corresponding motor.

[0058] For example, the input end of the propulsion fluid control directional valve 302 is connected to the second hydraulic oil output line 420 through the third output sub-line 320, and the output end of the propulsion fluid control directional valve 302 is connected to the propulsion motor 303. The propulsion motor 303 is connected to the hydraulic oil return line 430 through the second return sub-line 330. When the first sub-control valve 3011 is turned on, the propulsion fluid control directional valve 302 operates in the lower position. The hydraulic oil flowing through the third output sub-line 320 and the propulsion fluid control directional valve 302 enters from the second end of the propulsion motor 303 and flows out from the first end, thereby causing the propulsion motor 303 to reverse. The propulsion motor 303 can drive the hydraulic down-the-hole hammer 204 to retract through a corresponding mechanical structure. When the second sub-control valve 3012 is turned on, the propulsion fluid control directional valve 302 is put into operation. The hydraulic oil flowing through the third output sub-pipeline 320 and the propulsion fluid control directional valve 302 enters from the first end of the propulsion motor 303 and flows out from the second end, thereby causing the propulsion motor 303 to rotate in the forward direction. The propulsion motor 303 can drive the hydraulic down-the-hole hammer 204 to drill through the corresponding mechanical structure.

[0059] For example, the input end of the rotary hydraulic control directional valve 304 is connected to the second hydraulic oil output line 420 through the third output sub-line 320, and the output end of the rotary hydraulic control directional valve 304 is connected to the rotary motor 305. The rotary motor 305 is connected to the hydraulic oil return line 430 through the second return sub-line 330. When the third sub-control valve 3013 is turned on, the rotary hydraulic control directional valve 304 operates in the lower position. The hydraulic oil flowing through the rotary hydraulic control directional valve 304 via the third output sub-line 320 enters from the second end of the rotary motor 305 and flows out from the first end, thereby causing the rotary motor 305 to reverse. The rotary motor 305 can drive the hydraulic down-the-hole hammer 204 to reverse through a corresponding mechanical structure. When the fourth sub-control valve 3014 is turned on, the rotary hydraulic control directional valve 304 is in the upper position. The hydraulic oil flowing through the third output sub-pipeline 320 and the rotary hydraulic control directional valve 304 enters from the first end of the rotary motor 305 and flows out from the second end, thereby causing the rotary motor 305 to rotate forward. The rotary motor 305 can drive the hydraulic downhole hammer 204 to rotate forward through the corresponding mechanical structure.

[0060] As described above, this embodiment uses a hydraulically driven high-pressure water pump 202 to pressurize the low-pressure water in the water tank 201 into high-pressure water, which then provides impact pressure to the hydraulic down-the-hole hammer 204. The direction of the hydraulic oil entering the propulsion motor 303 is controlled by the propulsion fluid control directional valve 302, thereby controlling the propulsion or retraction of the hydraulic down-the-hole hammer 204. The direction of the hydraulic oil entering the rotary motor 305 is controlled by the rotary fluid control directional valve 304, thereby controlling the rotation of the hydraulic down-the-hole hammer 204. Since a water pump pressure control valve 203 is installed on the first hydraulic oil output pipeline 410, the amount of hydraulic oil entering the hydraulically driven high-pressure water pump 202 can be controlled, thereby adjusting the pressure of the high-pressure water output by the hydraulically driven high-pressure water pump 202. This allows the impact pressure of the hydraulic down-the-hole hammer 204 to be adapted to different formations, resulting in better hole-forming quality in complex formations.

[0061] Please continue to refer to Figure 1 In this embodiment, during normal drilling, the hydraulic down-the-hole hammer 204 outputs hydraulic oil from the first hydraulic pump 110 through the first hydraulic oil output pipeline 410 into the first output sub-pipeline 220, and then through the water pump pressure control valve 203 into the hydraulically driven high-pressure water pump 202. Simultaneously, low-pressure water from the water tank 201 enters the hydraulically driven high-pressure water pump 202 through the inlet pipeline 210, where it is converted into high-pressure water and then delivered to the hydraulic down-the-hole hammer 204 to provide impact pressure. After the hydraulic oil completes its work in the hydraulically driven high-pressure water pump 202, it returns to the hydraulic pump station 100 through the first return sub-pipeline 230.

[0062] Meanwhile, the hydraulic oil output from the second hydraulic pump 120 enters the second output sub-pipeline 310 and the third output sub-pipeline 320 through the second hydraulic oil output pipeline 420. Part of the hydraulic oil entering the second output sub-pipeline 310 passes through the second sub-control valve 3012, and the other part passes through the fourth sub-control valve 3014. Part of the hydraulic oil entering the third output sub-pipeline 320 passes through the propulsion fluid control directional valve 302, and the other part passes through the rotary fluid control directional valve 304. At this time, the second sub-control valve 3012 is activated, controlling the propulsion fluid control directional valve 302 to operate in its upper position. This causes the hydraulic oil passing through the propulsion fluid control directional valve 302 to enter from the first end and exit from the second end of the propulsion motor 303, causing the propulsion motor 303 to rotate forward. The propulsion motor 303 can output propulsion pressure through a corresponding mechanical structure, driving the hydraulic down-the-hole hammer 204 to drill. After flowing out of the propulsion motor 303, the hydraulic oil can return to the hydraulic pump station 100 through the second return sub-pipeline 330. The fourth sub-control valve 3014 is activated, controlling the rotary fluid control directional valve 304 to operate in its upper position. This causes the hydraulic oil passing through the rotary fluid control directional valve 304 to enter from the first end of the rotary motor 305 and flow out from the second end, causing the rotary motor 305 to rotate forward. The rotary motor 305 can output torque through a corresponding mechanical structure, driving the hydraulic down-the-hole hammer 204 to rotate forward. After flowing out of the rotary motor 305, the hydraulic oil can return to the hydraulic pump station 100 through the second return sub-pipeline 330.

[0063] Figure 2 This is a schematic diagram of the liquid flow direction under the second operating condition of a hydraulic down-the-hole hammer control system provided in one embodiment of this application. Please continue to refer to... Figure 2 In this embodiment, when the hydraulic down-the-hole hammer 204 withdraws from the formation, the hydraulic oil output by the first hydraulic pump 110 enters the first output sub-pipeline 220 through the first hydraulic oil output pipeline 410, and then enters the hydraulically driven high-pressure water pump 202 after passing through the water pump pressure control valve 203. Simultaneously, the low-pressure water in the water tank 201 enters the hydraulically driven high-pressure water pump 202 through the inlet pipeline 210, and becomes high-pressure water under the action of the hydraulically driven high-pressure water pump 202, which then delivers the high-pressure water to the hydraulic down-the-hole hammer 204 to provide impact pressure. After the hydraulic oil completes its work in the hydraulically driven high-pressure water pump 202, it flows back to the hydraulic pump station 100 through the first return sub-pipeline 230.

[0064] Meanwhile, the hydraulic oil output from the second hydraulic pump 120 enters the second output sub-pipeline 310 and the third output sub-pipeline 320 through the second hydraulic oil output pipeline 420. Part of the hydraulic oil entering the second output sub-pipeline 310 passes through the first sub-control valve 3011, and the other part passes through the third sub-control valve 3013. Part of the hydraulic oil entering the third output sub-pipeline 320 passes through the propulsion fluid control directional valve 302, and the other part passes through the rotary fluid control directional valve 304. At this time, the first sub-control valve 3011 is activated, controlling the propulsion fluid control directional valve 302 to operate in the lower position. This causes the hydraulic oil passing through the propulsion fluid control directional valve 302 to enter from the second end of the propulsion motor 303 and flow out from the first end, causing the propulsion motor 303 to reverse. The propulsion motor 303 can output a retraction force through a corresponding mechanical structure, driving the hydraulic down-the-hole hammer 204 to retract. After flowing out of the propulsion motor 303, the hydraulic oil can return to the hydraulic pump station 100 through the second return sub-pipeline 330. The third sub-control valve 3013 is activated, controlling the rotary hydraulic control directional valve 304 to operate in its lower position. This causes the hydraulic oil passing through the rotary hydraulic control directional valve 304 to enter from the second end of the rotary motor 305 and flow out from the first end, causing the rotary motor 305 to reverse. The rotary motor 305 can output torque through a corresponding mechanical structure, driving the hydraulic down-the-hole hammer 204 to reverse. After flowing out of the rotary motor 305, the hydraulic oil can return to the hydraulic pump station 100 through the second return sub-pipeline 330.

[0065] Please continue to refer to Figure 1 In one possible implementation, the drilling control subsystem 300 of this embodiment further includes a propulsion proportional pressure regulating valve 306, a propulsion pressure limiting valve 307, a retraction pressure limiting valve 308, and a third return sub-pipeline 340.

[0066] Specifically, the first end of the propulsion proportional pressure regulating valve 306 and the first end of the propulsion pressure limiting valve 307 are both connected in parallel with the first end of the propulsion motor 303, the first end of the retraction pressure limiting valve 308 is connected in parallel with the second end of the propulsion motor 303, and the first ends of the propulsion proportional pressure regulating valve 306, the propulsion pressure limiting valve 307, and the retraction pressure limiting valve 308 are all connected to the output end of the propulsion fluid control reversing valve 302; the second ends of the propulsion proportional pressure regulating valve 306, the propulsion pressure limiting valve 307, and the retraction pressure limiting valve 308 are all connected to the hydraulic oil return pipeline 430 through the third return sub-pipeline 340.

[0067] When this embodiment is Figure 1When operating under the conditions shown, by adjusting the opening of the propulsion pressure relief valve 307, a portion of the hydraulic oil entering the propulsion fluid control directional valve 302 can flow into the third return sub-pipeline 340 through the propulsion pressure relief valve 307, thereby controlling the amount of hydraulic oil entering the propulsion motor 303 and adjusting the ultimate propulsion pressure value output by the propulsion motor 303. The working principle of the propulsion proportional pressure regulating valve 306 is similar to that of the propulsion pressure relief valve 307, and the propulsion proportional pressure regulating valve 306 can further control the propulsion pressure value of the propulsion motor 303.

[0068] When this embodiment is Figure 2 When working under the conditions shown, by adjusting the opening of the retraction pressure relief valve 308, a portion of the hydraulic oil entering the propulsion fluid control reversing valve 302 can flow into the third return sub-pipeline 340 through the retraction pressure relief valve 308, thereby controlling the amount of hydraulic oil entering the propulsion motor 303 and adjusting the ultimate retraction pressure value output by the propulsion motor 303.

[0069] Furthermore, the drilling control subsystem 300 also includes a forward pressure relief valve 309 and a reverse pressure relief valve 311.

[0070] Specifically, the first end of the forward pressure relief valve 309 is connected in parallel with the first end of the rotary motor 305, and the first end of the reverse pressure relief valve 311 is connected in parallel with the second end of the rotary motor 305. Both the first ends of the forward pressure relief valve 309 and the reverse pressure relief valve 311 are connected to the output end of the rotary hydraulic control directional valve 304. The second ends of both the forward pressure relief valve 309 and the reverse pressure relief valve 311 are connected to the hydraulic oil return line 430 via the third return sub-line 340.

[0071] When this embodiment is Figure 1 When working under the conditions shown, by adjusting the opening of the forward pressure relief valve 309, a portion of the hydraulic oil entering the rotary hydraulic control directional valve 304 can flow into the third return sub-pipeline 340 through the forward pressure relief valve 309, thereby controlling the amount of hydraulic oil entering the rotary motor 305 and adjusting the forward limit torque output by the rotary motor 305.

[0072] When this embodiment is Figure 2 When working under the conditions shown, by adjusting the opening of the reverse pressure relief valve 311, a portion of the hydraulic oil entering the rotary hydraulic control directional valve 304 can flow into the third return sub-pipeline 340 through the reverse pressure relief valve 311, thereby controlling the amount of hydraulic oil entering the rotary motor 305 and adjusting the reverse limit torque output by the rotary motor 305.

[0073] As can be seen from the above description, this embodiment can adjust the impact pressure, propulsion pressure and rotation torque of the hydraulic down-the-hole hammer 204 according to different formations, so that the hydraulic down-the-hole hammer 204 can be adapted to different formations and ensure the hole formation quality in complex formations.

[0074] Figure 3 This is a schematic diagram of the liquid flow direction under the third operating condition of a hydraulic down-the-hole hammer control system provided in an embodiment of this application. Please continue to refer to... Figure 1 and Figure 3 In one possible implementation, this embodiment further includes a rotary pressure sensor 312 and an anti-jamming valve 313. The rotary pressure sensor 312 is disposed between the output end of the rotary fluid control directional valve 304 and the first end of the rotary motor 305. The first end of the anti-jamming valve 313 is connected in parallel with the first end of the propulsion motor 303. The second end of the anti-jamming valve 313 is connected to the third return sub-pipeline 340. The third end of the anti-jamming valve 313 is connected between the rotary pressure sensor 312 and the rotary motor 305 through the rotary fluid pipeline 350.

[0075] During normal drilling with the hydraulic down-the-hole hammer 204 in this embodiment, the rotary pressure sensor 312 can monitor the rotary torque output by the rotary motor 305 in real time. When encountering abnormal conditions such as sudden changes in formation or large fractures, such as… Figure 3 As shown, the hydraulic oil flowing into the anti-jamming valve 313 through the rotary fluid line 350 increases, causing the anti-jamming valve 313 to open. After the anti-jamming valve 313 opens, the hydraulic oil output from the propulsion fluid control directional valve 302 flows through the anti-jamming valve 313 into the third return sub-line 340, thus returning to the hydraulic pump station 100 and no longer driving the propulsion motor 303, causing the hydraulic down-the-hole hammer 204 to stop drilling and preventing damage to the drill rod and jamming. When the rotary pressure returns to normal, the hydraulic oil in the rotary fluid line 350 decreases, the anti-jamming valve 313 closes, and the hydraulic down-the-hole hammer 204 can drill normally.

[0076] Figure 4 This is a schematic diagram of the liquid flow direction under the fourth operating condition of a hydraulic down-the-hole hammer control system provided in an embodiment of this application. Please refer to... Figure 1 and Figure 4 In one possible implementation, the rotary motor 305 of this embodiment includes a first rotary rotor motor 3051 and a second rotary rotor motor 3052 arranged in parallel, and a reversing valve 314 is provided between the second rotary rotor motor 3052 and the rotary fluid control reversing valve 304.

[0077] like Figure 4As shown, after the reversing valve 314 is turned on, the hydraulic oil flowing out of the rotary hydraulic control reversing valve 304 can simultaneously enter the first rotary rotor motor 3051 and the second rotary rotor motor 3052, thereby increasing the torque output of the rotary motor 305. In this embodiment, the reversing valve 314 can be a manual switching valve. When it is necessary to disassemble the drill pipe, the reversing valve 314 can be manually turned on, thereby increasing the torque output of the rotary motor 305 to facilitate drill pipe disassembly. During normal drilling, the reversing valve 314 can be manually turned off, and the second rotary rotor motor 3052 will not output torque, thus allowing the hydraulic down-the-hole hammer 204 to rotate normally.

[0078] Furthermore, this embodiment also includes an auxiliary control subsystem 500, which includes an auxiliary cylinder and an auxiliary action control valve 501. The auxiliary cylinder is connected to the first hydraulic oil output line 410 and the hydraulic oil return line 430 through the auxiliary action control valve 501.

[0079] In this embodiment, the auxiliary cylinders include a drill arm moving cylinder 502, a front clamping cylinder 503, a rear clamping cylinder 504, a pitching cylinder 505, a compensation cylinder 506, or a tilting cylinder 507.

[0080] When this embodiment is Figure 4 When working under the conditions shown, the hydraulic oil output by the first hydraulic pump 110 enters the front clamping cylinder 503, the rear clamping cylinder 504 and the tilting cylinder 507 after passing through the auxiliary action control valve 501, so as to cooperate in completing the clamping and tilting action when the drill rod is disassembled, thereby improving the disassembly efficiency.

[0081] Figure 5 This is a schematic diagram of the liquid flow direction under the fifth operating condition of a hydraulic down-the-hole hammer control system provided in an embodiment of this application. Please refer to... Figure 5 Before normal drilling, the hydraulic oil output by the first hydraulic pump 110 enters the drill arm moving cylinder 502, pitch cylinder 505 and compensation cylinder 506 through the auxiliary action control valve 501, thereby adjusting the drilling posture of the hydraulic down-the-hole hammer 204.

[0082] This embodiment also provides an advanced drilling rig, including the above-described hydraulic down-the-hole hammer control system.

[0083] Because the advanced drilling in this embodiment is equipped with the aforementioned hydraulic down-the-hole hammer control system, the impact pressure, propulsion pressure, and rotation torque of the hydraulic down-the-hole hammer can be adjusted according to different geological environments, thereby enabling the hydraulic down-the-hole hammer to adapt to different formations and ensure the quality of hole formation in complex formations.

[0084] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0085] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0086] It should be noted that in the description of this application, the terms "first" and "second" are used only for convenience in describing different components and should not be construed as indicating or implying a sequential relationship, relative importance, or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features.

[0087] The embodiments or implementation methods in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0088] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hydraulic down-the-hole hammer control system, characterized in that, include: The hydraulic pump station is connected to the first hydraulic oil output pipeline and the hydraulic oil return pipeline; A high-pressure water subsystem includes a water tank, a hydraulically driven high-pressure water pump, a water pump pressure control valve, and a hydraulic down-the-hole hammer. The water tank and the hydraulic down-the-hole hammer are connected via an inlet pipe. The hydraulically driven high-pressure water pump is installed on the inlet pipe and located between the water tank and the hydraulic down-the-hole hammer. The hydraulically driven high-pressure water pump is also connected to a first hydraulic oil output pipe via a first output sub-pipe. A water pump pressure control valve is installed on the first output sub-pipe and is located between the hydraulic pump station and the hydraulically driven high-pressure water pump. The hydraulically driven high-pressure water pump is also connected to the hydraulic oil return pipe via a first return sub-pipe. The water inlet pipe is also equipped with a pressure reducing valve, a ball valve, an inlet water pressure sensor, and a high-pressure water pressure sensor; The pressure reducing valve, ball valve, and inlet pressure sensor are sequentially arranged between the water tank and the liquid-driven high-pressure water pump. The pressure reducing valve is located close to the water tank, and the ball valve is also connected to an air source. The high-pressure water pressure sensor is located between the liquid-driven high-pressure water pump and the hydraulic down-the-hole hammer. The first output sub-pipe is also equipped with a drive pressure sensor, which is located between the water pump pressure control valve and the liquid-driven high-pressure water pump. It also includes a drilling control subsystem, and the hydraulic pump station is connected to a second hydraulic oil output pipeline; the drilling control subsystem includes a pilot proportional control valve, a propulsion fluid control directional valve, a propulsion motor, a rotary fluid control directional valve, and a rotary motor; the pilot proportional control valve is connected to the second hydraulic oil output pipeline through a second output sub-pipeline, and the pilot proportional control valve includes a first sub-control valve, a second sub-control valve, a third sub-control valve, and a fourth sub-control valve, wherein the first sub-control valve is connected to the first end of the propulsion fluid control directional valve, the second sub-control valve is connected to the second end of the propulsion fluid control directional valve, and the third sub-control valve is connected to the rotary fluid control directional valve. The first end of the rotary fluid control directional valve is connected to the second end of the fourth sub-control valve; the input end of the propulsion fluid control directional valve is connected to the second hydraulic oil output line through the third output sub-line, and the output end of the propulsion fluid control directional valve is connected to the propulsion motor, which is connected to the hydraulic oil return line through the second return sub-line; the input end of the rotary fluid control directional valve is connected to the second hydraulic oil output line through the third output sub-line, and the output end of the rotary fluid control directional valve is connected to the rotary motor, which is connected to the hydraulic oil return line through the second return sub-line. The drilling control subsystem also includes a rotary pressure sensor, an anti-jamming valve, and a third return sub-pipeline. The rotary pressure sensor is located between the output end of the rotary fluid control directional valve and the first end of the rotary motor. The first end of the anti-jamming valve is connected in parallel with the first end of the propulsion motor. The second end of the anti-jamming valve is connected to the third return sub-pipeline. The third end of the anti-jamming valve is connected between the rotary pressure sensor and the rotary motor through the rotary fluid pipeline.

2. The hydraulic down-the-hole hammer control system according to claim 1, characterized in that, The drilling control subsystem also includes a propulsion proportional pressure regulating valve, a propulsion pressure limiting valve, a retraction pressure limiting valve, and a third return sub-pipeline; The first end of the propulsion proportional pressure regulating valve and the first end of the propulsion pressure limiting valve are both connected in parallel to the first end of the propulsion motor. The first end of the retraction pressure limiting valve is connected in parallel to the second end of the propulsion motor. The first ends of the propulsion proportional pressure regulating valve, the first ends of the propulsion pressure limiting valve, and the first ends of the retraction pressure limiting valve are all connected to the output end of the propulsion fluid control reversing valve. The second end of the propulsion proportional pressure regulating valve, the second end of the propulsion pressure limiting valve, and the second end of the retraction pressure limiting valve are all connected to the hydraulic oil return pipeline through the third return sub-pipeline.

3. The hydraulic down-the-hole hammer control system according to claim 2, characterized in that, The drilling control subsystem also includes a forward pressure limiting valve and a reverse pressure limiting valve; The first end of the forward pressure relief valve is connected in parallel with the first end of the rotary motor, the first end of the reverse pressure relief valve is connected in parallel with the second end of the rotary motor, and the first ends of both the forward pressure relief valve and the reverse pressure relief valve are connected to the output end of the rotary hydraulic control directional valve. The second end of the forward pressure relief valve and the second end of the reverse pressure relief valve are both connected to the hydraulic oil return pipeline through the third return sub-pipeline.

4. The hydraulic down-the-hole hammer control system according to claim 1, characterized in that, The rotary motor includes a first rotary rotor motor and a second rotary rotor motor connected in parallel, and a reversing valve is provided between the second rotary rotor motor and the rotary fluid control reversing valve.

5. The hydraulic down-the-hole hammer control system according to claim 1, characterized in that, It also includes an auxiliary control subsystem, which includes an auxiliary cylinder and an auxiliary motion control valve. The auxiliary cylinder is connected to the first hydraulic oil output pipeline and the hydraulic oil return pipeline through the auxiliary motion control valve.

6. The hydraulic down-the-hole hammer control system according to claim 5, characterized in that, The auxiliary cylinders include a drill arm moving cylinder, a front clamping cylinder, a rear clamping cylinder, a pitching cylinder, a compensation cylinder, or a tilting cylinder.

7. An advanced drilling rig, characterized in that, Includes the hydraulic down-the-hole hammer control system as described in any one of claims 1-6.

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