Directional hole gas parameter measuring device and method based on water pressure induction

Abstract

The invention relates to a directional hole gas parameter measuring device and method based on water pressure induction, and belongs to the technical field of coal mining and coal mine safety. A data acquisition and control mechanism is used for acquiring water pressure change in a drill rod so as to control a device action mechanism to block a water passing channel of the drill rod, so that the water flow direction is changed; a rubber cylinder of the rubber cylinder mechanism expands to block the hole bottom of the directional drilling hole, and gas emission data of the hole bottom are collected to detect gas emission parameters of the closed space of the hole bottom, so that coal seam gas parameters are indirectly obtained, while-drilling multi-point detection of the closed space of the hole bottom of the directional long drilling hole is achieved, and the multi-point gas parameters can be obtained. According to the method, the action of the device in the hole is controlled through the self-designed water pressure change in the drill rod, the directional hole gas parameter measurement while drilling is achieved, and the method has the advantages of being reliable in action and convenient to operate.

Description

Technical Field

[0001] The present invention belongs to the technical fields of coal mining and coal mine safety, and relates to a device and method for measuring gas parameters of directional holes based on water pressure induction. Background Art

[0002] Detecting and mastering the gas parameter distribution of the coal seam exposed by directional drilling is the basis for optimizing the design of gas drainage boreholes, and supporting fixed-point permeability enhancement such as long borehole directional fracturing and water pressure slitting, improving the gas prevention and control effect in large areas, and realizing accurate and efficient gas extraction. For the mature directional long borehole drilling techniques such as hard coal directional drilling and top (bottom) plate comb-shaped boreholes in soft and broken coal seams, the drilling length is generally greater than 300m. When using traditional methods for measuring coal seam gas parameters in directional long boreholes, there are problems such as complex operation processes, large sampling workload, few measuring points, and small controlled areas, which are prone to misjudgment of the regional outburst danger, and cannot accurately calculate the total amount of coal seam gas resources, affecting the design and implementation of gas control measures and being unfavorable to the safe production of coal mines.

[0003] Quickly plugging a small area of the bottom of the hole and detecting the gas emission parameters in the bottom hole space, and inversely calculating the coal seam gas parameters at the detection point based on the measured gas emission parameters is one of the effective ways to obtain the gas parameter distribution of the coal seam exposed by directional drilling while drilling. It can indirectly and quickly obtain coal seam gas parameters at multiple points to guide the design and construction of gas control measures. It is of great significance for improving the gas control effect and realizing accurate and efficient gas extraction, and ensuring the safe production of coal mines. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a device and method for measuring gas parameters of directional holes based on water pressure induction.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] On the one hand, the present invention provides a device for measuring gas parameters of directional holes based on water pressure induction, including a motor joint, a rubber barrel mechanism, an action mechanism, a data acquisition and control mechanism, and a drill pipe joint; the action mechanism includes an action mechanism housing and an action piston; the action mechanism housing is of a cylindrical structure, and an over-flow channel is provided therein. One end of the action mechanism housing is connected to the motor joint, and the other end is connected to the rubber barrel mechanism. The other end of the rubber barrel mechanism is connected to the drill pipe joint; a pressure relief hole and a test hole are provided on the action mechanism housing for communicating the inside and outside of the action mechanism housing; a diversion hole is provided on the rubber barrel mechanism for filling water into the rubber barrel mechanism to make it expand and seal the hole.

[0007] The data acquisition and control mechanism is fixed inside the housing of the actuating mechanism. The actuating piston is driven by the data acquisition and control mechanism to axially slide inside the housing of the actuating mechanism. The data acquisition and control mechanism acquires the water pressure data inside the drill pipe and drives the actuating piston to the first state or the second state according to the pressure difference of the water pressure data.

[0008] The first state is that the actuating piston separates the diversion hole from the flow-through channel, connects the pressure relief hole with the diversion hole, separates the test hole from the parameter sensor connector, and connects the two ends of the flow-through channel.

[0009] The second state is that the actuating piston connects the diversion hole with the flow-through channel, separates the pressure relief hole from the diversion hole, connects the test hole with the parameter sensor connector, and separates the two ends of the flow-through channel.

[0010] When in the second state, the data acquisition and control mechanism acquires the gas emission parameters in the enclosed space through the test hole and stores and analyzes them.

[0011] Furthermore, the data acquisition and control mechanism includes a data acquisition and analysis module and an action control module.

[0012] The data acquisition and analysis module includes a water pressure sensor, a parameter sensor, a data analysis and control device, a parameter sensor connector, and a gas guide pipe.

[0013] The water pressure sensor, the parameter sensor, and the data analysis and control device are arranged inside the housing of the actuating mechanism. The parameter sensor connector is arranged on the side wall of the actuating piston and is connected to the parameter sensor through the gas guide pipe. The data analysis and control device is electrically connected to the water pressure sensor and the parameter sensor.

[0014] The action control module includes a control circuit and an electric push rod. The electric push rod is connected to the actuating piston. The control circuit receives the signal from the data analysis and control device and controls the telescopic movement of the electric push rod to control the sliding of the actuating piston inside the housing of the actuating mechanism.

[0015] Furthermore, the actuating piston includes a piston head and a side wall. The side wall is slidably connected to the inner wall of the housing of the actuating mechanism. The piston head is connected to the side wall. A fixing device is arranged in the flow-through channel and is used to cooperate with the piston head to seal the flow-through channel. The side wall is connected with a plurality of sealing rings.

[0016] When the actuating piston is in the first state, the actuating piston drives the sealing ring to separate the diversion hole from the flow-through channel, connects the pressure relief hole with the diversion hole, separates the test hole from the parameter sensor connector, and the piston head does not contact the fixing device to connect the two ends of the flow-through channel.

[0017] When the actuating piston is in the second state, the actuating piston drives the sealing ring to move, connecting the diversion hole with the flow-through channel, separating the pressure relief hole from the diversion hole, connecting the test hole with the parameter sensor connector, and the piston head contacts the fixing device to separate both ends of the flow-through channel.

[0018] Furthermore, the sealing ring is composed of a first sealing ring, a second sealing ring, a third sealing ring, and a fourth sealing ring;

[0019] When the actuating piston is in the first state, the first sealing ring is located on the side of the diversion hole near the drill pipe joint, the second sealing ring is located on the side of the pressure relief hole near the motor joint. The first sealing ring and the second sealing ring connect the diversion hole and the pressure relief hole in this way and separate them from the flow-through channel; the third sealing ring is located between the parameter sensor connector and the test hole to separate the parameter sensor connector from the test hole; the fourth sealing ring is located on the side of the test hole near the motor joint to separate the test hole from the flow-through channel;

[0020] When the actuating piston is in the second state, the first sealing ring is located on the side of the diversion hole near the motor joint. Thus, the side of the diversion hole near the drill pipe joint is connected to the flow-through channel and separated from the pressure relief hole; the second sealing ring is located on the side of the pressure relief hole near the motor joint, thus closing the pressure relief hole; the third sealing ring is located on the side of the test hole near the motor joint, thus connecting the test hole with the parameter sensor connector.

[0021] Furthermore, the rubber cylinder mechanism includes a rubber cylinder mandrel, a rubber cylinder connector, and a rubber cylinder; the rubber cylinder mandrel is fixed on the rubber cylinder connector, the rubber cylinder is connected to the rubber cylinder mandrel, one end of the rubber cylinder connector is connected to the actuating mechanism housing, and the other end is connected to the drill pipe joint; the diversion hole connects the flow-through channel and the rubber cylinder.

[0022] Furthermore, the data acquisition and analysis module collects the water flow data passing through the flow-through channel through a water pressure sensor, compares the water pressure difference with a preset threshold through a data analysis and control device. If it is less than or equal to the preset threshold, it controls the actuating piston to be in the first state; if it is greater than the preset threshold, it controls the actuating piston to be in the second state;

[0023] When in the second state, water flows through the diversion hole into the rubber cylinder to seal the hole. The data acquisition and analysis module collects the gas passing through the test hole, the parameter sensor connector, and the gas pipe through a parameter sensor, and stores and analyzes the gas emission parameters through a data analysis and control device.

[0024] Furthermore, the end of the actuating piston near the motor joint is a Mitsubishi-shaped cover, one side of which is connected to the side wall of the actuating piston, and the other side is connected to the piston head equipped with a sealing ring.

[0025] Further, the data acquisition and analysis module further includes a housing of the data acquisition and control mechanism. The housing of the data acquisition and control mechanism is limited within the housing of the actuating mechanism. The water pressure sensor and the parameter sensor are arranged at the end of the housing of the data acquisition and control mechanism close to the rubber barrel mechanism. The data analysis and control device is arranged inside the housing of the data acquisition and control mechanism close to the water pressure sensor and the parameter sensor. The electric push rod and the control circuit are arranged at the end of the housing of the data acquisition and control mechanism close to the motor connector.

[0026] On the other hand, the present invention provides a method for measuring gas parameters in a directional hole based on water pressure induction, including the following steps:

[0027] S1: Installation preparation: Assemble the drill pipe of the directional drilling tool, the drill pipe joint, the rubber barrel mechanism, the actuating mechanism, the data acquisition and control mechanism, the motor connector, and the downhole motor in sequence.

[0028] S2: Directional drilling: Normally construct to the preset detection position according to the directional drilling construction process. During normal directional drilling, the water flow inside the drill pipe passes through the flow channel and passes through the data acquisition and control mechanism. The water pressure sensor collects the water passing data. When the water pressure difference of the water passing data analyzed by the data analysis and control device is less than the preset threshold B, the control circuit does not work. The test hole and the parameter sensor joint are not connected. The sealing ring separates the flow channel from the diversion hole, the pressure relief hole, and the test hole. The water flow inside the drill pipe normally passes through the flow channel, and the parameter sensor joint is sealed by the sealing ring and is not connected to the outside.

[0029] S3: Measurement while drilling: Stop drilling and continue to inject water to remove slag until the drill cuttings at the bottom of the hole are completely removed. Increase the flow rate of the pump outside the hole to above the normal working flow rate, and set the upper limit pressure of the pump to value A, where A > B. When the water flow rate inside the drill pipe increases, the water pressure sensor collects the water passing data. The data analysis and control device analyzes that the water pressure difference generated by the water passing data is greater than B, which prompts the control circuit to control the electric push rod to push the actuating piston. The data analysis and control device records the time T after the piston moves. When the piston head with the sealing ring is limited in the fixing device, the diversion hole and the pressure relief hole are separated from each other, the diversion hole is connected to the flow channel, the water flow direction changes, and the water flow enters the diversion hole from the flow channel, causing the rubber barrel to expand, thereby sealing the annular space between the bottom of the drilling hole and the rubber barrel, forming a closed space from the rubber barrel to the bottom of the drilling hole. The device enters the hole sealing state, the parameter sensor joint is connected to the test hole, and the gas in the closed space enters the parameter sensor through the gas pipe, so as to collect the gas emission parameters in the closed space and transmit them to the data analysis and control device for storage and analysis.

[0030] S4: Continue drilling: When the measurement time T reaches T0, the water pressure of the pump outside the hole is removed. When the measurement time T reaches T1, the data analysis and control device automatically controls the circuit to reset the electric ejector rod. The electric ejector rod resets the action piston to the drilling state, the diversion hole communicates with the pressure relief hole, the water in the rubber cylinder is drained, and the hole sealing is completed. Adjust the pump outside the hole to the normal drilling working state and continue the drilling construction according to the directional drilling construction technology.

[0031] S5: Multi-point measurement: When the drilling is constructed again to the next preset detection position, repeat S3 - S4 to achieve continuous multi-point measurement.

[0032] S6: After the entire drilling construction is completed, withdraw the drill tool, read the measurement data from the data acquisition and analysis module, calculate the coal seam gas parameters through the gas emission parameters at the bottom of the hole, and complete the measurement work.

[0033] The beneficial effects of the present invention are as follows: The present invention collects the change of the water pressure inside the drill pipe through the data acquisition and control mechanism, thereby controlling the action mechanism of the device to block the water passage of the drill pipe, changing the water flow direction, expanding the rubber cylinder of the rubber cylinder mechanism to seal the bottom of the directional drill hole, collecting the gas emission data at the bottom of the hole, and measuring the coal seam gas parameters. The present invention realizes the measurement of the gas parameters of the directional hole while drilling by the method of controlling the action of the device inside the hole through the self-designed change of the water pressure inside the drill pipe, and has the characteristics of reliable action and convenient operation.

[0034] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. Description of the Drawings

[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0036] Figure 1 Structural diagram of the gas parameter measurement device in the drilling state;

[0037] Figure 2 Structural diagram of the gas parameter measurement device in the hole-sealing state;

[0038] Figure 3 Cross-sectional view of the outer shell of the data acquisition and control mechanism;

[0039] Figure 4 Side view of the Mitsubishi-shaped cover on the action piston.

[0040] 1 - Actuating mechanism housing, 2 - Motor connector, 3 - Drill pipe connector, 4 - Flow guiding hole, 5 - Pressure relief hole, 6 - Test hole, 7 - Overflow channel, 8 - Water pressure sensor, 9 - Control circuit, 10 - Electric ejector rod, 11 - Actuating piston, 12 - Air guiding rubber hose, 13 - Rubber cylinder, 14 - Parameter sensor, 15 - Parameter sensor connector, 16 - Rubber cylinder connecting piece, 17 - Rubber cylinder mandrel, 18 - Data acquisition and control mechanism housing, 19 - Data analysis and control device, 20 - Fixing device, 21 - 25 - Sealing rings. Detailed implementation manners

[0041] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0042] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0043] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] Embodiment 1:

[0045] As Figure 1-2 shown, this embodiment provides a device for measuring gas parameters while drilling in a directional hole based on water pressure induction, which realizes rapid plugging of the annular space at the bottom of the hole to detect the gas emission parameters in the closed space at the bottom of the hole, so as to indirectly obtain the coal seam gas parameters and realize multi-point detection while drilling in the closed space at the bottom of the directional long hole, that is, it can obtain multi-point gas parameters.

[0046] This device includes a drill pipe joint 3, a rubber barrel mechanism, an actuating mechanism, a data acquisition and control mechanism, and a motor joint 2. By controlling the actuating mechanism through the water pressure difference, the rubber barrel is expanded to seal the bottom of the drilling hole, and the data acquisition and analysis module detects the characteristic parameters of gas emission in the closed space at the bottom of the hole.

[0047] Among them, the drill pipe joint 3 is used to connect the drill pipe of the directional drilling tool; the rubber barrel mechanism includes a rubber barrel mandrel 17, a rubber barrel connecting piece 16 and a rubber barrel 13, which are used to seal the bottom of the drilling hole. The actuating mechanism includes an actuating mechanism housing 1 and an actuating piston 11, which are used for the water passage of the drill pipe and changing the water flow direction; the data acquisition and control mechanism includes a data acquisition and control mechanism housing 18, a data acquisition and analysis module and an actuating control module, which are used to collect the water pressure data inside the drill pipe and the gas emission data in the annular space formed by the device and the drilling hole, so as to control the action of the actuating mechanism; one end of the motor joint is connected to the actuating mechanism housing, and the other end is connected to the bottom hole motor of the directional drilling tool.

[0048] One end of the actuating mechanism housing 1 is connected to the rubber barrel mechanism, and the other end is connected to the motor joint 2. The actuating mechanism housing 1 is successively provided with a diversion hole 4, a pressure relief hole 5 and a test hole 6 from the end connected to the rubber barrel mechanism. A limiting groove is arranged inside the actuating mechanism housing 1 near the motor joint 2 end for limiting the data acquisition and control mechanism.

[0049] The data acquisition and analysis module includes a parameter sensor 14, a water pressure sensor 8, a parameter sensor joint 15, a gas guide rubber tube 12 and a data analysis and control device 19;

[0050] Both the water pressure sensor 8 and the parameter sensor 14 are arranged at the end of the data acquisition and control mechanism housing 18 near the rubber barrel mechanism. The parameter sensor joint 15 is connected to the parameter sensor 14 through the gas guide rubber tube 12;

[0051] The data analysis and control device 19 is arranged inside the data acquisition and control mechanism housing 18 near the water pressure sensor 8 and the parameter sensor 14 ends. The structure diagram of the data acquisition and control mechanism housing 18 is as Figure 3 shown.

[0052] The actuating control module includes a control circuit 9 and an electric push rod 10;

[0053] The control circuit 9 is located inside the data acquisition and control mechanism housing 18 near the motor joint 2 end;

[0054] The electric push rod 10 is located near the motor joint 2 end of the data acquisition and control mechanism housing 18 and is connected to the piston head of the actuating piston 11 containing a sealing ring 25.

[0055] The data acquisition and control mechanism collects the water pressure data inside the drill pipe, and drives the actuating piston into the drilling state or the hole sealing state according to the pressure difference of the water pressure data.

[0056] The actuating piston 11 is a hollow tubular structure, axially installed inside the actuating mechanism housing 1 and can slide axially along the actuating mechanism housing 1; a hollowed-out section is provided at the end of the actuating piston 11 near the motor connector 2 for installing the data acquisition and control mechanism, and five sealing rings are provided at the end near the rubber cylinder mechanism.

[0057] In the drilling state, the sealing rings 21-22 are located on both sides of the diversion hole 4 and the pressure relief hole 5, where the sealing ring 21 is located on the side of the diversion hole 4 near the drill pipe joint 3, and the sealing ring 22 is located on the side of the pressure relief hole 5 near the motor connector 2. At this time, the diversion hole 4 is communicated with the pressure relief hole 5 and is separated from the flow-through channel; the sealing rings 23-24 are located on both sides of the test hole 6, where the sealing ring 23 is located on the side of the test hole 6 near the drill pipe joint 3, and the sealing ring 24 is located on the side of the test hole 6 near the motor connector 2. A parameter sensor connector 15 is provided between the sealing ring 22 and the sealing ring 23; as Figure 4 shown, the end of the actuating piston 11 near the motor connector is a Mitsubishi-shaped cover, one side is connected to the hollowed-out section of the actuating piston, and the other side is a piston head equipped with a sealing ring 25.

[0058] In the hole sealing state, the actuating piston drives the sealing ring to move. The sealing ring 21 is located on the side of the diversion hole near the motor connector. Thus, the side of the diversion hole near the drill pipe joint is communicated with the flow-through channel and is separated from the pressure relief hole; the sealing ring 22 is located on the side of the pressure relief hole near the motor connector, thus sealing the pressure relief hole; the sealing ring 23 is located on the side of the test hole near the motor connector, thus connecting the test hole with the parameter sensor connector; the sealing ring 26 on the piston head contacts the fixing device to separate both ends of the flow-through channel; when in the hole sealing state, the data acquisition and control mechanism collects the gas emission parameters in the closed space through the test hole and stores and analyzes them.

[0059] Embodiment 2:

[0060] This embodiment provides a method for measuring gas parameters in a directional hole based on water pressure induction, including the following steps:

[0061] S1: Installation preparation: Assemble components such as the drill pipe joint 3, the rubber cylinder mechanism, the actuating mechanism, the data acquisition and control mechanism, and the motor connector 2 in sequence, and install them between the downhole motor and the non-magnetic drill pipe below, and install the motor connector 2 close to the downhole motor;

[0062] S2: Directional drilling: Normally construct to the designed detection position according to the directional drilling construction technology; During normal directional drilling, the water flow inside the drill pipe passes through the flow channel 7 through the data acquisition and control mechanism. The water pressure sensor 8 collects the water passing data, and the data analysis and control device 19 analyzes that the water pressure difference of the water passing data is less than B, which is not enough to make the control circuit 9 work. Therefore, during the whole process of normal drilling, the in-drilling measuring device for gas parameters in the directional hole based on water pressure induction is in a non-working state. In this state, the test hole 6 and the parameter sensor connector 15 are not connected. The sealing rings 21-24 separate the flow channel 7 from the diversion hole 4, the pressure relief hole 5 and the test hole 6. The water flow inside the drill pipe normally passes through this device, and the parameter sensor connector 15 is sealed by the sealing rings 22 and 23 and is not connected to the outside.

[0063] S3: In-drilling measurement: Stop drilling and continue to inject water to remove slag until the drill cuttings at the bottom of the hole are completely removed. Increase the flow rate of the pump outside the hole to above the normal working flow rate, and set the upper limit pressure of the pump to A > B value. When the water flow rate inside the drill pipe increases, the water pressure sensor 8 collects the water passing data. The data analysis and control device 19 analyzes that the water pressure difference generated by the water passing data is greater than B, which prompts the control circuit 9 to control the electric ejector rod 10 to push forward. The data analysis and control device records the time T after the piston moves. When the piston head with the sealing ring 25 is limited in the fixing device 20, the diversion hole and the pressure relief hole are separated, the diversion hole is connected to the flow channel, and at the same time the water flow direction changes. The water flow starts to enter the diversion hole 4 from the flow channel 7 to expand the rubber cylinder 13 for hole sealing, so as to block the annular space between the bottom of the drill hole and the rubber cylinder 13, and form a closed space from the rubber cylinder 13 to the bottom of the drill hole. At this time, the device enters the hole sealing state, the parameter sensor connector 15 is aligned and connected with the test hole 6, and the gas in the closed space passes through the gas guide hose 12 and is collected by the parameter sensor 14 for the gas emission parameters in the closed space. The data analysis and control device 19 stores and analyzes them.

[0064] S4: Continue drilling: When the measurement time T reaches T0, remove the water pressure of the pump outside the hole. When the measurement time T reaches T1, the data analysis and control device 19 automatically controls the control circuit 9 to control the electric ejector rod 10 to reset. The electric ejector rod resets the moving piston 11 to the drilling state. The diversion hole is connected to the pressure relief hole, and the water in the rubber cylinder is drained, ending the hole sealing. Adjust the pump outside the hole to the normal drilling working state and continue the drilling construction according to the directional drilling construction technology;

[0065] S5: Multi-point measurement: When the drilling is constructed again to the designed detection position, repeat S3 and S4 to achieve multi-point continuous measurement.

[0066] S6: After the whole drilling construction is completed, withdraw the drill tool and disassemble the measuring device. Read the measurement data from the data acquisition and analysis module, and calculate the coal seam gas parameters through the gas emission parameters at the bottom of the hole to complete the measurement work.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A directional hole gas parameter measurement device based on water pressure sensing, characterized in that: It includes a motor joint, a rubber cylinder mechanism, an action mechanism, a data acquisition and control mechanism and a drill pipe joint; the action mechanism includes an action mechanism housing and an action piston; the action mechanism housing is a cylindrical structure with a flow passage therein, one end of the action mechanism housing is connected to the motor joint, the other end is connected to the rubber cylinder mechanism, and the other end of the rubber cylinder mechanism is connected to the drill pipe joint; a pressure relief hole and a test hole are provided on the action mechanism housing to connect the inside and outside of the action mechanism housing; a flow guide hole is provided on the rubber cylinder mechanism to fill water into the rubber cylinder mechanism to expand and seal the hole; The data acquisition and control mechanism is fixed in the housing of the action mechanism, and the action piston is driven by the data acquisition and control mechanism to slide axially in the housing of the action mechanism; the data acquisition and control mechanism collects water pressure data inside the drill pipe, and drives the action piston to the first state or the second state according to the pressure difference of the water pressure data; The first state is: the actuating piston separates the flow guide hole from the flow passage, connects the pressure relief hole to the flow guide hole, separates the test hole from the parameter sensor connector, and connects the two ends of the flow passage; The second state is: the actuating piston connects the flow guide hole with the flow passage, separates the pressure relief hole from the flow guide hole, connects the test hole with the parameter sensor connector, and separates the two ends of the flow passage; When in the second state, the data collection and control mechanism collects gas outburst parameters in the closed space through the test hole, and performs storage and analysis.

2. The directional hole gas parameter measuring device based on water pressure sensing according to claim 1 is characterized in that: The data acquisition and control mechanism includes a data acquisition and analysis module and an action control module; The data acquisition and analysis module includes a water pressure sensor, a parameter sensor, a data analysis control device, a parameter sensor connector, and an air guide tube; The water pressure sensor, parameter sensor and data analysis control device are arranged in the housing of the action mechanism, the parameter sensor connector is arranged on the side wall of the action piston, and is connected to the parameter sensor through the air guide pipe; the data analysis control device is electrically connected to the water pressure sensor and the parameter sensor; The motion control module includes a control circuit and an electric push rod; the electric push rod is connected to the motion piston, and the control circuit receives a signal from a data analysis control device to control the extension and retraction of the electric push rod to control the motion piston to slide in the housing of the motion mechanism.

3. The directional hole gas parameter measuring device based on water pressure sensing according to claim 2 is characterized in that: The actuating piston comprises a piston head and a side wall, wherein the side wall is slidably connected to the inner wall of the actuating mechanism housing; the piston head is connected to the side wall, and a fixing device is provided in the flow passage for cooperating with the piston head to close the flow passage; The side wall is connected with a plurality of sealing rings; When the actuating piston is in the first state, the actuating piston drives the sealing ring to separate the flow guide hole from the flow passage, connect the pressure relief hole with the flow guide hole, separate the test hole from the parameter sensor connector, and the piston head does not contact the fixing device to connect the two ends of the flow passage; When the actuating piston is in the second state, the actuating piston drives the sealing ring to move, connects the flow guide hole with the flow channel, separates the pressure relief hole from the flow guide hole, connects the test hole with the parameter sensor connector, and the piston head contacts the fixing device to separate the two ends of the flow channel.

4. The directional hole gas parameter measuring device based on water pressure sensing according to claim 3 is characterized in that: The sealing ring is composed of a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring; When the actuating piston is in the first state, the first sealing ring is located on the side of the flow guide hole near the drill pipe joint, and the second sealing ring is located on the side of the pressure relief hole near the motor joint. The first sealing ring and the second sealing ring connect the flow guide hole and the pressure relief hole and separate them from the flow passage; the third sealing ring is located between the parameter sensor joint and the test hole to separate the parameter sensor joint from the test hole; the fourth sealing ring is located on the side of the test hole near the motor joint to separate the test hole from the flow passage; When the actuating piston is in the second state, the first sealing ring is located on the side of the flow guide hole near the motor joint, thereby the side of the flow guide hole near the drill rod joint is connected to the flow channel and separated from the pressure relief hole; the second sealing ring is located on the side of the pressure relief hole near the motor joint, thereby closing the pressure relief hole; the third sealing ring is located on the side of the test hole near the motor joint, thereby connecting the test hole with the parameter sensor joint.

5. The directional hole gas parameter measuring device based on water pressure sensing according to claim 4 is characterized in that: The rubber cartridge mechanism comprises a rubber cartridge core shaft, a rubber cartridge connector and a rubber cartridge; the rubber cartridge core shaft is fixed on the rubber cartridge connector, the rubber cartridge is connected to the rubber cartridge core shaft, one end of the rubber cartridge connector is connected to the action mechanism housing, and the other end is connected to the drill rod joint; the flow guide hole connects the flow channel and the rubber cartridge.

6. The directional hole gas parameter measuring device based on water pressure sensing according to claim 5 is characterized in that: The data acquisition and analysis module collects water flow data passing through the flow channel through the water pressure sensor, and compares the water pressure difference with the preset threshold through the data analysis control device. If the water pressure difference is less than or equal to the preset threshold, the action piston is controlled to be in the first state; if the water pressure difference is greater than the preset threshold, the action piston is controlled to be in the second state; When in the second state, water flows into the rubber cylinder through the guide hole to achieve sealing. The data acquisition and analysis module collects gas entering through the test hole, the parameter sensor connector and the gas guide pipe through the parameter sensor, and stores and analyzes the gas outflow parameters through the data analysis control device.

7. The directional hole gas parameter measuring device based on water pressure sensing according to claim 6 is characterized in that: The end of the actuating piston near the motor joint is a Mitsubishi-shaped cover, one side of which is connected to the side wall of the actuating piston, and the other side is connected to the piston head equipped with a sealing ring.

8. The directional hole gas parameter measuring device based on water pressure sensing according to claim 7 is characterized in that: The data acquisition and analysis module also includes a data acquisition and control mechanism housing, which is limited in the action mechanism housing, and the water pressure sensor and parameter sensor are arranged at the end of the data acquisition and control mechanism housing near the rubber cylinder mechanism; the data analysis control device is arranged inside the data acquisition and control mechanism housing near the water pressure sensor and parameter sensor end; the electric push rod and control circuit are arranged at the end of the data acquisition and control mechanism housing near the motor connector.

9. A method for determining gas parameters of directional holes based on water pressure sensing, characterized in that: The directional hole gas parameter measuring device according to any one of claims 1 to 9 comprises the following steps: S1: Installation preparation: assemble the directional drilling tool drill pipe, drill pipe joint, rubber cylinder mechanism, action mechanism, data acquisition and control mechanism, motor joint, and bottom hole motor in sequence; S2: Directional drilling: According to the directional drilling construction process, the water flow inside the drill pipe passes through the flow channel and the data acquisition and control mechanism. The water pressure sensor collects the water flow data. The data analysis and control device analyzes that the water pressure difference of the water flow data is less than the preset threshold value B. The control circuit does not work, the test hole and the parameter sensor joint are not connected, the sealing ring separates the flow channel from the diversion hole, the pressure relief hole and the test hole, the water flow inside the drill pipe passes through the flow channel normally, and the parameter sensor joint is closed by the sealing ring and is not connected to the outside world; S3: Drilling while drilling: stop drilling and continue to inject water to drain the slag until the drill cuttings are completely drained from the bottom of the hole; increase the flow rate of the pump outside the hole to above the normal working flow rate, and set the upper limit pressure of the pump to A, A>B; when the water flow rate in the drill pipe increases, the water pressure sensor collects the water passing data, and the water pressure difference generated by the data analysis control device analyzing the water passing data is greater than B, prompting the control circuit to control the electric push rod to push the action piston, and the data analysis control device records the time T after the piston action. When the piston head with a sealing ring is confined in the fixing device, the diversion hole and the pressure relief hole are separated, the diversion hole is connected to the flow channel, the water flow direction changes, and the water flows from the flow channel into the diversion hole, causing the rubber cylinder to expand, thereby blocking the annular space between the bottom of the borehole and the rubber cylinder, forming a closed space from the rubber cylinder to the bottom of the borehole; the device enters the sealing state, the parameter sensor connector is connected to the test hole, and the gas in the closed space enters the parameter sensor through the gas guide pipe, thereby collecting the gas outflow parameters in the closed space and transmitting them to the data analysis control device for storage and analysis; S4: Continue drilling: When the measurement time T reaches T0, the pump outside the hole removes the water pressure. When the measurement time T reaches T1, the data analysis control device automatically controls the electric push rod to reset. The electric push rod resets the action piston to the drilling state, the diversion hole is connected to the pressure relief hole, and the water in the rubber cylinder is released, and the hole sealing is completed; the pump outside the hole is adjusted to the normal drilling working state, and the drilling construction is continued according to the directional drilling construction process; S5: Multi-point measurement: When the drilling is re-constructed to the next preset detection position, S3-S4 are repeated to achieve multi-point continuous measurement; S6: After the entire drilling construction is completed, the drilling tool is withdrawn, the measured data is read from the data acquisition and analysis module, and the coal seam gas parameters are calculated through the hole bottom gas outburst parameters to complete the measurement work.

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