Long-distance hydraulic sub-control type peristaltic directional drilling system

Abstract

The application is a long-distance hydraulic sub-control peristaltic directional drilling system. The field involved is geological drilling, underground energy and other technical fields. When drilling long distances in traditional underground engineering, the cumulative length of the drill pipe increases, causing uncertain transverse and longitudinal vibrations of the drill pipe during long-distance operation. The drilling efficiency and quality cannot meet the engineering needs, so a long-distance hydraulic sub-control peristaltic directional drilling system is invented. The application designs a set of intelligent and efficient downhole drilling equipment, which can complete long-distance drilling with a drilling trajectory that meets the expected plan operation. The equipment has high intelligence and mechanization, distributed hydraulic system control, and improved adaptability. When drilling long distances, the hydraulic system in the peristaltic device works to support the hole wall, so that the drill pipe is free from instability during long-distance operation, improving the drilling quality and ensuring one-time hole completion. It provides important guidance for subsequent drilling operations.

Description

Technical Field

[0001] This invention belongs to the field of long-distance directional drilling for underground energy, and specifically, it is an invention of a long-distance hydraulically controlled peristaltic directional drilling system. Background Technology

[0002] Coal mine gas disasters have always been one of the major hazards during mining operations. Traditional methods of gas extraction using dedicated roadways, while effective, increase roadway excavation volume, costs, and management difficulties. Therefore, long-distance drilling technology for gas extraction has been developed.

[0003] While drilling extraction technology has achieved some success, problems such as drill rod instability, easy deviation, and inability to accurately lock the position during long-distance drilling still need to be solved.

[0004] When drilling long distances, the cumulative length of the drill rod increases continuously, and the contact area between the drill rod and the hole wall increases, leading to energy loss and making the drill rod prone to getting stuck. Summary of the Invention

[0005] The purpose of this invention is to provide a long-distance directional drilling device and working method for underground coal mines, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a long-distance hydraulically controlled peristaltic directional drilling system, comprising a support device 1, a follow-up device 2, and a guide device 3.

[0007] The fixed support device includes a fixed support hydraulic support 1.1, an emulsion tank 1.2, a sub-control hydraulic tank 1.3, a PLC system control tank 1.4, a power hydraulic pipeline 1.5, a signal transmission tank 1.6, a fixed support filling port 1.7, a pressure relief filling port 1.8, a cylinder body 1.9, and a control valve 1.10.

[0008] The end of the support device 1 is connected to the armored hollow pipe 4, and the input end of the armored hollow pipe 4 is tightly connected to the downhole drilling rig. High-pressure water, high-pressure emulsion, high-pressure power fluid, and signal control lines are input from the downhole drilling rig and transmitted to the drill string position. The control valve of the fluid filling port of the support 1.7 / pressure relief 1.8 is a device that controls the rise and fall of the hydraulic support 1.1. The high-pressure emulsion in the emulsion tank 1.2 is first pumped into the sub-control hydraulic tank 1.3 through the control valve 1.10, and then the opening and closing of the support / pressure relief fluid filling port is controlled by the command of the specific PLC system control tank 1.4, so that the support device can complete the command task.

[0009] The hydraulic support 1.1 in the fixed support device is an independent hydraulic support, which is installed at the top, bottom and two sides of the fixed support device. It can be controlled by the control chamber 1.4 of the PLC system. For example, the drilling tool can be moved to the side by supporting the hydraulic support on the left and retracting the hydraulic support on the right.

[0010] Each hydraulic support 1.1 in the fixed support device has a column-like arrangement on its upper part. When the hydraulic support contacts the hole wall, it increases the frictional resistance with the hole wall, increases the drilling thrust, and stabilizes the drilling work of the drill bit.

[0011] The emulsion tank 1.2 in the fixed support device is a device for providing high-pressure emulsion to the fixed support hydraulic support. It is installed between the fixed support hydraulic supports 1.1 and connected to the sub-control hydraulic tank 1.3 through the control valve 1.10. It is also used to connect to the emulsion transport pipeline 2.2 in the follow-up device 2 and pump it to the emulsion tank 3.4 in the guide device. By pumping the high-pressure emulsion into the hydraulic support, the PLC system controls the instructions of the control tank.

[0012] The sub-controlled hydraulic chamber 1.3 in the fixed support device is installed between each individual fixed support hydraulic support 1.1 and is connected to the filling port of the fixed support 1.7 / pressure relief 1.8 of each fixed support hydraulic support, so as to pump the high pressure emulsion in the emulsion chamber 1.2 into the fixed support hydraulic support.

[0013] The PLC system control compartment 1.4 in the fixed support device is connected to the display terminal of the downhole drilling rig. It transmits signals to the PLC system control compartment remotely, enabling it to issue control commands to the drilling equipment.

[0014] As an improvement of the present invention, the high-pressure pumping pipeline adopts an armored hollow pipeline, which can cooperate with the support device, the follow-up device, and the guide device to achieve a small radius turn. The end of the power hydraulic pipeline 1.5 in the support device 1 is connected to the output end 4 of the armored hollow pipeline. The output end of the power hydraulic pipeline 1.5 is connected to the power hydraulic pipeline in the follow-up device, and finally connected to the hydraulic motor pump inlet in the guide device.

[0015] The signal transmission chamber 1.6 in the fixed support device is connected by a cable in an armored hollow pipe. Data from sensors installed on the equipment is collected in the signal transmission chamber and fed back to the receiving device of the downhole drilling rig. After analysis, the signal is remotely transmitted to the PLC system control chamber to issue instructions.

[0016] The filling ports of the fixed support 1.7 / pressure relief 1.8 in the fixed support device adopt ball-shaped hydraulic control valves. When the same fixed support hydraulic support filling port is opened at the same time, when emulsion is pumped into the fixed support filling port, as the liquid level rises continuously, the emulsion inside the compressed filling cylinder is squeezed and flows out along the compressed filling port, thus completing the lifting of the hydraulic support.

[0017] The cylinder body is a component of the fixed-support hydraulic support and serves as a carrier for the support and high-pressure emulsion. When the hydraulic support is fully retracted, the support is completely flush with the cylinder body. The cylinder body is flush with the outer shell of the fixed-support device, ensuring that the device can easily pull the fixed-support hydraulic support when the support is fully retracted.

[0018] The following device 2 includes a following hydraulic support 2.1, an emulsion transport pipeline 2.2, a power hydraulic hose 2.3, a signal transmission pipeline 2.4, an intelligent control pipeline 2.5, a spherical connecting device 2.6, a support filling port 2.7, a pressure relief filling port 2.8, a cylinder body 2.9, and a control valve 2.10.

[0019] The following hydraulic support in the following device 2 consists of a cylinder 1.9, a support 2.7 / pressure relief 2.8 filling port, and a spherical connecting device 2.6. The following hydraulic support is installed in a cross shape and is the "steering wheel" of the guiding device 3. The following hydraulic support is the key device to realize the peristalsis of the equipment. Its end is connected to the output end of the fixed support device, and its head is connected to the input end of the guiding device.

[0020] The end of the emulsion pipe 2.2 in the following device is connected to the output end of the emulsion tank 1.2 in the support device, and the emulsion in the support device is pumped into the emulsion tank 3.4 of the guide device through the emulsion pipe.

[0021] The intelligent control pipe 2.5 in the following device is connected at its end to the PLC system control compartment 1.4 in the support device, and then its line is laid to the control valve in the guide device. It is a hollow pipe, and its head is a hemispherical embedded in the spherical connecting device 3.7 of the guide device.

[0022] The spherical connecting device 2.6 of the following device is the head of the following hydraulic support 2.1. It is spherically embedded in the spherical connecting device 3.7 at the end of the guide device 3. It is a movable connection. As the following hydraulic support extends and retracts, the guide device will also turn accordingly.

[0023] The support 2.7 / pressure relief 2.8 filling port in the following device controls the extension and retraction of the following hydraulic support, which is also controlled by the PLC system control chamber 1.4 in the fixed support device. Emulsion is pumped from the emulsion tank in the fixed support device to the support / pressure relief filling port of the following hydraulic support via an external pipeline.

[0024] When the hydraulic support in the following device is completely depressurized, the support retracts completely into the support cylinder 2.9, at which point the device is in its smallest diameter state.

[0025] The guiding device 3 includes a fixed hydraulic support 3.1, a hydraulic motor 3.2, a drill bit 3.3, an emulsion tank 3.4, a signal sensor 3.5, a sub-control hydraulic tank 3.6, a spherical connecting device 3.7, a fixed support filling port 3.8, a pressure relief filling port 3.9, a cylinder 3.10, and a control valve 3.11.

[0026] The arrangement of the fixed hydraulic support 3.1 in the guide device is generally the same as that of the fixed hydraulic support 1.1 in the fixed support device. The length of the guide device is controlled by the selection of the hydraulic motor and is generally smaller than that of the fixed support device. Therefore, the number of fixed hydraulic supports 3.1 in the guide device is also smaller than that of fixed hydraulic supports 1.1 in the guide device.

[0027] The hydraulic motor 3.2 in the guiding device is closely connected to the power hydraulic pipeline 2.3 in the following device and is powered by the high-pressure mud pump truck downhole, which converts the energy into mechanical energy to power the drill bit to complete the breaking operation.

[0028] The end of the emulsion tank 3.4 in the following device is connected to the emulsion transport pipe 2.2 in the following device. The high-pressure emulsion is transported from the emulsion tank 1.2 in the supporting device to the emulsion tank of the following device through the emulsion transport pipe 2.2.

[0029] The signal sensor compartment 3.5 of the guiding device feeds back the equipment's operating status and transmits it to the signal transmission compartment 1.6 in the fixed support device via the signal transmission pipe 2.4 in the following device. Finally, the data is fed back to the downhole calculator for analysis.

[0030] The guide device's sub-control hydraulic chamber 3.6 connects to the emulsion chamber 3.4 and the filling port, pumping the high-pressure emulsion in the emulsion chamber to the sub-control hydraulic chamber, and then pumping it into the corresponding filling port.

[0031] The spherical connecting device 3.7 in the guiding device is located at the tail of the guiding device and is movably connected to the spherical device 2.6 in the following device. The spherical connecting device in the guiding device has a bearing ball groove to fix the ball and prevent it from slipping. It can also be embedded in the ball of the following device so that it will not fall off.

[0032] The hydraulic inlet of the guide device, which is the fixed support 3.8 / pressure relief 3.9, is used to control the lifting and lowering of the fixed support hydraulic support. The PLC system control compartment in the fixed support device 1 sends a command to the control valve of the fixed support / pressure relief hydraulic inlet in the guide device to control the fixed support hydraulic support 3.1 in the guide device to execute the corresponding command. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the main cross-section of the support device of the present invention.

[0034] Figure 2This is a schematic diagram of the cross-section of the fixing device of the present invention.

[0035] Figure 3 This is a schematic diagram of the cross-section of the support device of the present invention.

[0036] Figure 4 This is a side cross-sectional view of the following device of the present invention.

[0037] Figure 5 This is a schematic diagram of the aa cross-section of the following device of the present invention.

[0038] Figure 6 This is a schematic diagram of the BB planing surface of the follow-up device of the present invention.

[0039] Figure 7 This is a schematic diagram of the main cross-section of the guiding device of the present invention.

[0040] Figure 8 This is a schematic diagram of the main cross-section of the guiding device of the present invention.

[0041] Figure 9 This is a schematic diagram of the overall structure of a long-distance hydraulically controlled peristaltic directional drilling system according to the present invention.

[0042] Figure Labels

[0043] 1. Fixed support device, 1.1 Fixed support hydraulic support, 1.2 Emulsion tank, 1.3 Sub-control hydraulic tank, 1.4 PLC system control tank, 1.5 Power hydraulic pipeline, 1.6 Signal transmission tank, 1.7 Fixed support filling port, 1.8 Pressure relief filling port, 1.9 Cylinder body, 1.10 Control valve; 2. Following device, 2.1 Following hydraulic support, 2.2 Emulsion transport pipeline, 2.3 Power hydraulic hose, 2.4 Signal transmission pipeline, Intelligent control 2.5 Pipeline; 2.6 Spherical connector; 2.7 Support filling port; 2.8 Pressure relief filling port; 2.9 Cylinder body; 2.10 Control valve; 3. Guide device; 3.1 Fixed support hydraulic bracket; 3.2 Hydraulic motor; 3.3 Drill bit; 3.4 Emulsion tank; 3.5 Signal sensor; 3.6 Sub-control hydraulic tank; 3.7 Spherical connector; 3.8 Fixed support filling port; 3.9 Pressure relief filling port; 3.10 Cylinder body; 3.11 Control valve; Detailed Implementation

[0044] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0045] The long-distance hydraulically controlled peristaltic directional drilling system comprises three basic structures: a support device 1, a follow-up device 2, and a guide device 3.

[0046] The fixed support device includes a fixed support hydraulic support 1.1, an emulsion tank 1.2, a sub-control hydraulic tank 1.3, a PLC system control tank 1.4, a power hydraulic pipeline 1.5, a signal transmission tank 1.6, a fixed support filling port 1.7, a pressure relief filling port 1.8, a cylinder body 1.9, and a control valve 1.10.

[0047] One example of the commands received during operation is as follows: When the downhole control console issues a "drill" command, the command is first sent to the PLC system control chamber 1.4 in the support device 1. Then, the PLC system control chamber controls the control valve 1.10 of the emulsion chamber 1.2 to open, allowing the emulsion to be pumped into the sub-control hydraulic chamber 1.3. Then, it controls the opening of the support filling port 1.7 of the support hydraulic support to open, allowing the emulsion to be pumped into the support hydraulic support 1.1. The support hydraulic support rises in the cylinder body. At this time, the support hydraulic support has completed its support operation. The point column device on the upper part of the support hydraulic support is in close contact with the borehole wall, completing the task of the support device when the "drill" command is issued.

[0048] When the downhole control console issues a "drilling" command, the "drilling" command is first sent to the PLC system control chamber 1.4 in the support device 1. Then, the PLC system control chamber controls the support filling port in the follow-up device 2 to open, so that the emulsion is pumped in. At this time, all the follow-up hydraulic supports support simultaneously, pushing the guide device forward to drill, thus completing the task of the follow-up device when the "drilling" command is issued.

[0049] When the downhole control console issues a "drilling" command, the command is first sent to the PLC system control chamber 1.4 in the support device 1. Then, the high-pressure emulsion in the emulsion chamber 1.2 of the support device 1 is pumped to the emulsion chamber 3.4 of the guide device 3 through the emulsion transport pipeline 2.2 in the follow-up device. Next, the control valve 3.11 of the emulsion chamber 3.4 is opened, allowing the emulsion to be pumped into the sub-control hydraulic chamber. Then, the pressure relief and filling port 3.9 in the sub-control hydraulic chamber 3.6 is opened, allowing the high-pressure emulsion to be pumped into it. All the support hydraulic supports in the guide device 3 retract into the cylinder 3.10. The guide device completes the "drilling" task.

[0050] There are two ways to determine the sequence of the "drilling" commands mentioned above. One is that the supporting device 1 works first, and after it completes, the following device 2 works slightly slower than the guiding device 3. The other is that the supporting device 1 and the guiding device 3 work first, and then the following device 2 begins working upon their completion.

[0051] The following device includes a following hydraulic support 2.1, an emulsion transport pipeline 2.2, a power hydraulic hose 2.3, a signal transmission pipeline 2.4, an intelligent control pipeline 2.5, a spherical connecting device 2.6, a support filling port 2.7, a pressure relief filling port 2.8, a cylinder body 2.9, and a control valve 2.10;

[0052] To illustrate the instructions received during operation, consider another example: When the downhole control console issues a "peristalsis" command, the command is first sent to the PLC system control chamber 1.4 in the support device 1. Then, the PLC system control chamber controls the control valve 1.10 of the emulsion chamber 1.2 to open, allowing the high-pressure emulsion to be pumped into the sub-control hydraulic chamber 1.3. The pressure relief and filling port of the support device 1.1 is then opened, allowing the emulsion to be pumped into the pressure relief and filling port. The support hydraulic support then begins to retract into the cylinder 1.10, completing the task of the support device when the "peristalsis" command is issued.

[0053] When the downhole control console issues a "peristalsis" command, the "peristalsis" command is first sent to the PLC system control chamber 1.4 in the support device 1. Then, the PLC system control chamber controls the pressure relief and filling port in the follow-up device 2 to open, so that the emulsion is pumped in. At this time, all the follow-up hydraulic supports retract simultaneously, pulling the support device forward to peristalse, thus completing the task of the follow-up device when the "peristalsis" command is issued.

[0054] When the downhole control console issues a "peristalsis" command, the command is first sent to the PLC system control chamber 1.4 in the support device 1. Then, the high-pressure emulsion in the emulsion chamber 1.2 of the support device 1 is pumped to the emulsion chamber 3.4 of the guide device 3 through the emulsion transport pipeline 2.2 in the follow-up device. Next, the control valve 3.11 of the emulsion chamber 3.4 is opened, allowing the emulsion to be pumped into the sub-control hydraulic chamber. Then, the support filling port 3.8 in the sub-control hydraulic chamber 3.6 is opened, allowing the high-pressure emulsion to be pumped in. All the support hydraulic supports in the guide device 3 begin to rise to the borehole wall and make close contact with it. The guide device completes the "drilling" task.

[0055] There are two ways to determine the sequence of the "peristalsis" commands mentioned above. One is that the guiding device 3 works first, and after it completes, the following device 2 moves slightly slower than the fixed guiding device 1. The other is that the fixed guiding device 1 and the guiding device 3 work first, and then the following device 2 starts working upon their completion.

[0056] The guiding device includes a fixed hydraulic support 3.1, a hydraulic motor 3.2, a drill bit 3.3, an emulsion tank 3.4, a signal sensor 3.5, a sub-control hydraulic tank 3.6, a spherical connecting device 3.7, a fixed support filling port 3.8, a pressure relief filling port 3.9, a cylinder body 3.10, and a control valve 3.11;

[0057] To give another example of the instructions received during operation, when the downhole control console issues the "directional drilling" instruction, the working method of the support device is the same as that of the "drilling" instruction, and will not be repeated here.

[0058] When the downhole control console issues a "directional drilling" command, the command is first sent to the PLC system control chamber 1.4 in the support device 1. Then, the PLC system control chamber controls the opening of the support filling port 2.7 in the follow-up device 2, allowing the emulsion to be pumped in. At this time, it is determined which drilling position the command is for, and then the follow-up hydraulic support makes the corresponding action. Let's assume drilling to the left. The left follow-up hydraulic support in the follow-up device begins to retract, and the top and bottom follow-up hydraulic supports also retract slightly compared to the left follow-up hydraulic support. Meanwhile, the right follow-up hydraulic support begins to support. Overall, the follow-up hydraulic support appears as a left-sloping plane when viewed from above, and the angle at this time is adapted to the angle of the "directional drilling" command.

[0059] When the downhole control console issues a "directional drilling" command, the guiding device operates in the same way as when issuing a "drilling" command, and will not be described again here.

[0060] The "directional drilling" described above can be carried out in any direction; only one direction of drilling is given here.

[0061] To illustrate the third example of instructions received during operation, when the downhole control console issues a "turn" command, it first determines which direction the turn will be. Let's assume a left turn. First, the "turn" command is sent to the PLC system control chamber 1.4 in the support device 1. Then, the PLC system control chamber controls the control valve 1.10 of the emulsion chamber 1.2 in the support device 1 to open, allowing the emulsion to be pumped into the sub-control hydraulic chamber 1.3. At this point, the control support filling port is opened. However, not all hydraulic supports are fully engaged. When turning left, the left-side hydraulic supports in the support device begin to work, but not fully, leaving some leeway. The right-side, top, and bottom hydraulic supports may not work or may only provide minimal support. When finished, the entire support device is close to the right side of the borehole wall.

[0062] When the downhole control console issues a "turn" command, the following device 2 operates in the same manner as when "directional drilling" to the left, with the entire following hydraulic support 2.1 positioned on a left-sloping plane to maintain alignment with the borehole direction.

[0063] When the downhole control console issues a "turn" command, the guiding device operates in a manner largely consistent with the "creep" command, and will not be elaborated further here.

[0064] The above is only a part of the instructions and does not cover all of them. When dealing with a stuck drill, the "peristalsis" can be reversed to form a "reverse" instruction.

Claims

1. A long distance hydraulic sectional control type peristaltic directional drilling system, characterized in that, The supporting device, the following device and the guiding device are included. The supporting device includes the hydraulic support, the emulsion tank, the hydraulic tank, the PLC system control tank, the power hydraulic pipeline and the signal transmission system tank. The hydraulic support is installed on the top, the bottom and the waist of the supporting device. Each hydraulic support is independently controlled and is used to contact the hole wall to ensure the drilling tool fixed. The upper part of the support is in point column type to increase the friction resistance. The emulsion tank is installed between the hydraulic supports and is located on the right top and the left bottom of the supporting device. The emulsion tank is connected with the hydraulic tank through the control valve to supply the high pressure emulsion. The PLC system control tank is installed on the left top of the supporting device to receive the remote signal to control the operation of the device. The power hydraulic pipeline is located in the center of the supporting device to supply the power liquid to the hydraulic motor of the guiding device. The signal transmission system tank is located on the right bottom of the supporting device to feed back the operation signal of the device to the remote calculator to reflect the operation of the device. The following device includes the hydraulic support, the emulsion pipeline, the power hydraulic pipeline, the signal transmission pipeline, the intelligent control pipeline and the spherical connecting device. The hydraulic support is installed between the supporting device and the guiding device to control the extension of the hydraulic support. The hydraulic support is connected with the guiding device through the spherical connecting device to control the direction of the guiding device. The emulsion pipeline is installed between the hydraulic supports and is located on the right top and the left bottom of the following device to pump the emulsion of the supporting device to the emulsion tank of the guiding device. The power hydraulic pipeline is installed in the center of the following device to transport the power liquid to the hydraulic motor of the guiding device to output the rotation speed and the torque. The signal transmission pipeline is installed on the left top of the following device to lay the signal transmission cable to transmit the signal of the device to the signal transmission system tank of the supporting device. The intelligent control pipeline is installed on the right bottom of the following device to transmit the control instruction of the PLC system control tank of the supporting device to the control valve of the guiding device. The spherical connecting device is the connecting device of the hydraulic support and the guiding device. The spherical connecting device has the bearing ball groove to fix the position of the ball. The guiding device comprises a supporting hydraulic support, a hydraulic motor, a drill bit, an emulsion tank, a signal sensor, a separate control hydraulic tank and a spherical connecting device; the supporting hydraulic support is respectively installed on the top, bottom and waist of the two sides of the guiding device, used for fixing the guiding device when working support, so that the following device drags the supporting device to move forward; the hydraulic motor is installed at the center of the guiding device, used for transmitting the power liquid from a long distance to the power hydraulic pipeline of the supporting device, then through the power hydraulic pipeline in the following device, finally pumped into the hydraulic motor, so as to convert the hydraulic pressure into torque and rotating speed to drive the drill bit to work; the drill bit is installed at the front end of the guiding device, used for crushing the rock to complete the drilling work; the emulsion tank is installed between the supporting hydraulic supports of the guiding device, and located at the right upper and left lower positions of the guiding device, and connected with the separate control hydraulic tank; the separate control hydraulic tank is used for pumping the emulsion pumped by the emulsion tank into the supporting hydraulic support through the control valve; the spherical connecting device is used for connecting the following device and the guiding device, realizing the drilling in any direction of the guiding device.

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