CN115467703A - Auxiliary directional long borehole gas extraction method and system - Google Patents
Auxiliary directional long borehole gas extraction method and system Download PDFInfo
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- E21B43/006—Production of coal-bed methane
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
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Abstract
The invention relates to the technical field of gas extraction, in particular to a method and a system for assisting directional long-borehole gas extraction. The application provides a supplementary directional long bore hole gas drainage method and system, has improved the degree of match of gas drainage negative pressure and long bore hole degree of depth, has solved the loss of pressure problem of back end in the long bore hole, and its economic suitability is higher, avoids the unfavorable condition with high costs, low repayment.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of gas extraction, in particular to a method and a system for assisting directional long-borehole gas extraction.
[ background of the invention ]
In the coal field, people have to look at the development of coal resources in the middle and deep layers along with the consumption of coal resources in the surface layer or near ground. However, as the mining depth increases, the gas content and the gas pressure also increase, the coal seam outburst risk is increased, and the gas control is very important. Common gas control measures comprise protective layer mining, pre-pumping coal seam gas and the like, and when the protective layer mining condition is not met, the pre-pumping coal seam gas becomes a main control measure; the gas of the pre-pumping coal seam is extracted by drilling holes along the seam or drilling holes through the seam. Along with the improvement of the mine mining mechanization technology and the rapid development of drilling machines, drilling rod instruments and drilling technology, the drilling machines capable of drilling more than 1000m appear, and the length of gas extraction drill holes is increased along with the development of the mine mining mechanization technology. However, as the length of the drill hole is increased, a plurality of problems are brought, wherein the matching of the drill hole depth and the extraction negative pressure becomes a key point.
At present, most of domestic and foreign scholars research results on mine gas extraction theories aim at shallow boreholes of dozens of meters, the problem of pressure drop of the long boreholes at the middle and rear sections is basically not considered, the problems that the construction site of the long boreholes has certain blindness, the pressure of gas extraction and the gas concentration cannot be controlled, the intelligent degree is low, manual regulation and control are needed, and the safety of the whole mining process is difficult to ensure.
[ summary of the invention ]
The invention aims to provide an auxiliary directional long-borehole gas extraction method and an auxiliary directional long-borehole gas extraction system, which improve the matching degree of gas extraction negative pressure and long-borehole depth, solve the problem of pressure loss of a rear section in a long borehole, have high economic applicability and avoid the unfavorable conditions of high cost and low return.
The application is realized by the following technical scheme: an auxiliary directional long borehole gas extraction method comprises the following steps:
step S1: assembling a gas extraction pump, an abnormality judgment unit, a distance measurement unit, a pressurization unit, an early warning unit and an economic applicability judgment unit, constructing a directional long-drill-hole gas extraction platform, installing sensors in the whole drill hole section, and numbering to obtain the extraction pressure and the gas concentration of the whole drill hole section;
step S2: the abnormality judgment unit judges whether the sensor in the step S1 returns abnormal data or not;
if yes, performing step S3, otherwise, performing step S8;
s3, judging whether the abnormal condition is caused by the mining depth by an abnormal judgment unit according to the actual sensor condition of the abnormal data returned in the step S2;
if so, performing the step S4, otherwise, sending an alarm signal to the terminal by the early warning unit, performing maintenance, and returning to the step S1 after the normal operation of the gas extraction platform is recovered;
and step S4: in the one or more sensors returning abnormal data in the step S3, the distance measuring unit determines the abnormal sensor closest to the drilling hole and judges that the abnormal sensor is positioned at the position of the drilling hole, and the pressurizing unit performs pressurization at a corresponding speed according to the position of the drilling hole and monitors whether the pressure at the bottom of the drilling hole is reduced or not in real time;
if so, entering the step S5, otherwise, sending an alarm signal to the terminal by the early warning unit, carrying out maintenance, and returning to the step S1 after the normal operation of the gas extraction platform is recovered;
step S5: the abnormality judgment unit judges whether the pressure detected by the drill hole bottom sensor is close to 1 +/-0.5 KPa or not;
if yes, reducing the supercharging speed and entering the step S6, otherwise, increasing the supercharging speed and returning to the step S4;
step S6: the abnormality judgment unit judges whether the pressure detected by the drill hole bottom sensor is negative pressure;
if so, stopping pressurizing and entering the step S7, otherwise, sending an alarm signal to the terminal by the early warning unit, carrying out maintenance, and returning to the step S1 after the normal operation of the gas extraction platform is recovered;
step S7: the economic applicability judging unit judges whether the threshold value is in the economic operation threshold value of the actual field gas extraction pump;
if yes, the step S8 is carried out, otherwise, the early warning unit sends an alarm signal to the terminal, and the extraction scheme is reset;
step S8: and (5) normally running.
According to the method for extracting the gas in the auxiliary directional long borehole, the abnormal data in the step S2 is comprehensively judged according to the pressure and the number of the sensors.
In the above method for extracting gas from an auxiliary directional long borehole, in step S3, the step of determining whether an abnormality is caused by the mining depth includes:
step S31: if the pressure of the sensors starting from a certain sensor and located at the position of the sensor and facing the bottom of the drill hole is positive and gradually increased, the abnormality is considered to be caused by the mining depth of the drill hole; otherwise, if the pressure of the individual sensor is abnormal, the gas extraction platform is stopped and whether the gas extraction platform is normal or not is checked.
In the method for extracting gas from the auxiliary directional long borehole, the position of the full-hole section where the sensor is located in step S4 is divided equally into three equal parts, namely a near section, a middle section and a far section, according to the depth of the on-site borehole.
According to the method for extracting the gas in the auxiliary directional long drilled hole, when the abnormal sensor is positioned at the near section, pressurization is carried out at an interval of 0.5KPa; when the abnormal sensor is positioned in the middle section, pressurizing at an interval of 0.3 KPa; when the abnormality sensor is located at the far stage, the pressure is increased at an interval of 0.1 KPa.
According to the method for assisting directional long-borehole gas extraction, the determination basis of the time field gas extraction economic operation threshold in the step S7 comprises the following steps: the cost consumed during the operation of the gas extraction pump is within the economic burden range of mineral products, and the operation efficiency of the gas extraction pump is not lower than 60%.
The processor comprises a processor electrically connected with the gas extraction pump and a sensor which is arranged in the whole hole section of the drilled hole and electrically connected with the processor, the processor comprises a processor mainboard, an abnormality judgment unit, a distance measurement unit, a pressurization unit and an early warning unit, the abnormality judgment unit, the distance measurement unit, the pressurization unit and the early warning unit are respectively electrically connected with the processor mainboard, and the sensor is respectively electrically connected with the abnormality judgment unit and the distance measurement unit.
According to the gas extraction system with the auxiliary directional long drilled hole, the sensor is integrated with the pressure detection module and the gas concentration detection module.
The gas extraction system with the auxiliary directional long drill hole comprises a primary pressurization module and a secondary pressurization module, wherein the primary pressurization module is electrically connected with the distance measuring unit through the processor main board, and the secondary pressurization module is electrically connected with the sensor at the bottom of the drill hole through the processor main board.
According to the gas extraction system with the auxiliary directional long drill hole, the economic applicability judgment unit is electrically connected with the processor main board.
Compared with the prior art, the method has the following advantages:
1. the invention discloses an auxiliary directional long borehole gas extraction method, which comprises the following steps of S1: assembling a gas extraction pump, an abnormality judgment unit, a distance measurement unit, a pressurization unit, an early warning unit and an economic applicability judgment unit, constructing a directional long-drill-hole gas extraction platform, installing sensors in the whole drill hole section, and numbering to obtain the extraction pressure and the gas concentration of the whole drill hole section; step S2: the abnormality judgment unit judges whether the sensor in the step S1 returns abnormal data or not; s3, judging whether the abnormal condition is caused by the mining depth by an abnormal judgment unit according to the actual sensor condition of the abnormal data returned in the step S2; and step S4: in the one or more sensors returning the abnormal data in the step S3, the distance measuring unit determines the abnormal sensor closest to the drilling hole and judges that the abnormal sensor is positioned at the drilling position, the pressurizing unit pressurizes at a corresponding speed according to the drilling position, and the pressure at the bottom of the drilling hole is monitored in real time to determine whether the pressure is reduced; step S5: the abnormality judgment unit judges whether the pressure detected by the sensor at the bottom of the drill hole is close to 1 +/-0.5 KPa or not; step S6: the abnormality judgment unit judges whether the pressure detected by the drill hole bottom sensor is negative pressure; step S7: the economic applicability judging unit judges whether the threshold value is in the economic operation threshold value of the actual field gas extraction pump; step S8: the gas extraction negative pressure and the long drilling depth are normally operated, the matching degree of the gas extraction negative pressure and the long drilling depth is improved, the problem of pressure loss of the rear section in the long drilling is solved, the economic applicability is high, and the unfavorable conditions of high cost and low return are avoided.
2. The invention relates to an auxiliary directional long-drill-hole gas extraction system, which comprises a processor electrically connected with a gas extraction pump and a sensor arranged in a whole-hole section of a drill hole and electrically connected with the processor, wherein the processor comprises a processor mainboard, an abnormality judgment unit, a distance measurement unit, a pressurization unit and an early warning unit, the abnormality judgment unit, the distance measurement unit, the pressurization unit and the early warning unit are respectively electrically connected with the processor mainboard, and the sensor is respectively electrically connected with the abnormality judgment unit and the distance measurement unit, so that the matching degree of gas extraction negative pressure and the depth of a long drill hole is improved, the problem of pressure loss of a rear section in the long drill hole is solved, the economic applicability is higher, and the unfavorable conditions of high cost and low return are avoided.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flow chart of an auxiliary directional long borehole gas extraction method according to an embodiment of the application.
Fig. 2 is a schematic diagram of an auxiliary directional long-borehole gas extraction system according to an embodiment of the application.
[ detailed description ] embodiments
In order to make the technical problems, technical solutions and advantageous effects solved by the present application more clear and obvious, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
As shown in fig. 1-2, an embodiment of the application provides an auxiliary directional long borehole gas extraction method, which includes the following steps:
step S1: assembling a gas extraction pump, an abnormality judgment unit, a distance measurement unit, a pressurization unit, an early warning unit and an economic applicability judgment unit, constructing a directional long-drill-hole gas extraction platform, installing sensors in the whole drill hole section, and numbering to obtain the extraction pressure and the gas concentration of the whole drill hole section;
step S2: the abnormality judgment unit judges whether the sensor in the step S1 returns abnormal data or not;
if yes, performing step S3, otherwise, performing step S8;
s3, judging whether the abnormal data is caused by the mining depth or not by an abnormal judgment unit according to the actual sensor condition of the abnormal data returned in the step S2;
if so, performing the step S4, otherwise, sending an alarm signal to the terminal by the early warning unit, performing maintenance, and returning to the step S1 after the normal operation of the gas extraction platform is recovered;
and step S4: in the one or more sensors returning the abnormal data in the step S3, the distance measuring unit determines the abnormal sensor closest to the drilling hole and judges that the abnormal sensor is positioned at the drilling position, the pressurizing unit pressurizes at a corresponding speed according to the drilling position, and the pressure at the bottom of the drilling hole is monitored in real time to determine whether the pressure is reduced;
if so, entering the step S5, otherwise, sending an alarm signal to the terminal by the early warning unit, carrying out maintenance, and returning to the step S1 after the normal operation of the gas extraction platform is recovered;
step S5: the abnormality judgment unit judges whether the pressure detected by the drill hole bottom sensor is close to 1 +/-0.5 KPa or not;
if yes, reducing the supercharging speed and entering the step S6, otherwise, increasing the supercharging speed and returning to the step S4;
step S6: the abnormality judgment unit judges whether the pressure detected by the drill hole bottom sensor is negative pressure;
if so, stopping pressurizing and entering the step S7, otherwise, sending an alarm signal to the terminal by the early warning unit, carrying out maintenance, and returning to the step S1 after the normal operation of the gas extraction platform is recovered;
step S7: the economic applicability judging unit judges whether the threshold value is in the economic operation threshold value of the actual field gas extraction pump;
if yes, the step S8 is carried out, otherwise, the early warning unit sends a warning signal to the terminal, and the extraction scheme is set again;
step S8: and (5) normally running.
The abnormal data in the step S2 is comprehensively judged according to the pressure and the number of the sensors; in the step S3, the step of judging whether an abnormality is caused by the mining depth is as follows: step S31: if the pressure of the sensors starting from a certain sensor and located at the position of the sensor and facing the bottom of the drill hole is positive and gradually increased, the abnormality is considered to be caused by the mining depth of the drill hole; otherwise, if the pressure of the individual sensor is abnormal, stopping the gas extraction platform and checking whether the gas extraction platform is normal; the position of the full-hole section where the sensor is located in the step S4 is divided equally into three equal parts according to the on-site drilling depth, namely a near section, a middle section and a far section; when the abnormal sensor is positioned at the near segment, pressurizing at an interval of 0.5KPa; when the abnormal sensor is positioned in the middle section, pressurizing at an interval of 0.3 KPa; when the abnormal sensor is positioned at the far section, the interval of 0.1KPa is adopted for pressurization; the basis for determining the time field gas extraction economic operation threshold value in the step S7 comprises the following steps: the cost consumed during the operation of the gas extraction pump is within the economic burden range of mineral products, and the operation efficiency of the gas extraction pump is not lower than 60%.
An auxiliary directional long-drill-hole gas extraction system comprises a processor 1 electrically connected with a gas extraction pump and a sensor 2 arranged on the whole hole section of a drill hole and electrically connected with the processor 1, wherein the processor 1 comprises a processor mainboard 11, an abnormality judgment unit 12, a distance measurement unit 13, a pressurization unit 14 and an early warning unit 15 which are respectively electrically connected with the processor mainboard 11, the sensor 2 is respectively electrically connected with the abnormality judgment unit 12 and the distance measurement unit 13, the matching performance of gas extraction negative pressure and long drill hole depth is ensured through the abnormality judgment unit 12 and the distance measurement unit 13, the problem of pressure loss of a long drill hole at the middle and rear sections is solved to a certain extent, and the added early warning unit 15 can help the supervision and management of actual gas extraction work; a pressure detection module 21 and a gas concentration detection module 22 are integrated on the sensor 2; the pressurization unit 14 comprises a primary pressurization module 141 and a secondary pressurization module 142, the primary pressurization module 141 is electrically connected with the distance measurement unit 13 through the processor mainboard 11, the secondary pressurization module 142 is electrically connected with the sensor 2 at the bottom of the drill hole through the processor mainboard 11, three equal divisions are carried out on the whole hole section according to the drilling depth of the realization site, namely a near section, a middle section and a far section, the primary pressurization module 141 controls a gas extraction pump to pressurize the interior of the drill hole according to the position of the sensor 2, and when the sensor closest to the drill hole is positioned at the near section, pressurization is carried out at an interval of 0.5KPa; when the sensor closest to the drill hole is positioned in the middle section, pressurizing at an interval of 0.3 KPa; when the sensor closest to the drill hole is located at a far section, the sensor 2 at the bottom of the drill hole is used for detecting the pressure, the re-pressurization module 142 is used for determining the rate of re-pressurization according to the comparison of the pressure data of the sensor 2 at the bottom of the drill hole with a critical value and a zero scale value, and the continuous pressurization is stopped after the extraction negative pressure is converted from positive pressure to negative pressure; the gas extraction system also comprises an economic applicability judgment unit 16 electrically connected with the processor mainboard 11, so that all supercharging behaviors can be ensured to be within the range of the economic capability of a mine, and the unfavorable conditions of high cost and low return are avoided.
Constructing a gas extraction platform according to coal seam geological data and occurrence conditions of an actual mine, arranging the sensors 2 in the whole borehole section, numbering according to the sequence from the bottom of the borehole to the orifice of the borehole, and detecting and judging abnormal conditions returned by the sensors 2 through the abnormal judgment unit 12, wherein the abnormal conditions of the sensors 2 are comprehensively judged according to the pressure and the number of the sensors, and if the pressure of the sensors 2 starting from a certain sensor 2 and positioned behind the certain sensor 2 is positive pressure and gradually rises, the abnormal conditions are considered to be caused by the borehole mining depth; if the pressure of each sensor is abnormal, the work is stopped, whether a system or an instrument is normal or not is checked, meanwhile, the distance measuring unit 13 determines the sensor 2 closest to a drilling hole according to the serial number of the sensor 2 and the interval situation of each sensor 2, and judges the position of the sensor 2 located at the full-hole section, wherein the full-hole section is divided into three equal parts according to the drilling depth of a site, namely a near section, a middle section and a far section, the primary pressurizing module 141 controls a gas extraction pump to pressurize the inside of the drill hole according to the position of the sensor 2, and when the sensor closest to the drill hole is located at the near section, the pressurizing is carried out at an interval of 0.5KPa; when the sensor closest to the drill hole is positioned in the middle section, pressurizing at an interval of 0.3 KPa; when the sensor closest to the borehole is located at a far section, pressurization is carried out at an interval of 0.1KPa, when the gas extraction pump is used for pressurization, the sensor 2 at the bottom of the borehole detects pressure, the re-pressurization module 142 determines the rate of re-pressurization according to comparison between pressure data of the sensor 2 at the bottom of the borehole and a critical value and a zero scale value, and stops continuing pressurization after extraction negative pressure is converted from positive pressure to negative pressure, and the economic applicability judgment unit 16 is configured to compare economic expense consumed by the adjusted gas extraction pump with planned mine distribution economic expense and determine whether pressurization is economically applicable.
In summary, the present application has, but is not limited to, the following beneficial effects:
the invention relates to an auxiliary directional long-drill-hole gas extraction system, which comprises a processor 1 electrically connected with a gas extraction pump and a sensor 2 arranged in the whole hole section of a drill hole and electrically connected with the processor 1, wherein the processor 1 comprises a processor mainboard 11, an abnormity judgment unit 12, a distance measurement unit 13, a pressurization unit 14 and an early warning unit 15 which are respectively electrically connected with the processor mainboard 11, the sensor 2 is respectively electrically connected with the abnormity judgment unit 12 and the distance measurement unit 13, the matching property of gas extraction negative pressure and long drill hole depth is ensured through the abnormity judgment unit 12 and the distance measurement unit 13, the problem of pressure loss of a long drill hole at the middle and rear sections is solved to a certain extent, and the added early warning unit 15 can help the supervision and management of actual gas extraction work; a pressure detection module 21 and a gas concentration detection module 22 are integrated on the sensor 2; the pressurization unit 14 comprises a primary pressurization module 141 and a secondary pressurization module 142, the primary pressurization module 141 is electrically connected with the distance measurement unit 13 through the processor mainboard 11, the secondary pressurization module 142 is electrically connected with the sensor 2 at the bottom of the drill hole through the processor mainboard 11, three equal divisions are carried out on the whole hole section according to the drilling depth of the realization site, namely a near section, a middle section and a far section, the primary pressurization module 141 controls a gas extraction pump to pressurize the interior of the drill hole according to the position of the sensor 2, and when the sensor closest to the drill hole is positioned at the near section, pressurization is carried out at an interval of 0.5KPa; when the sensor closest to the drill hole is positioned in the middle section, pressurizing at an interval of 0.3 KPa; when the sensor closest to the drill hole is located at a far section, the sensor 2 at the bottom of the drill hole is used for detecting the pressure, the re-pressurization module 142 is used for determining the rate of re-pressurization according to the comparison of the pressure data of the sensor 2 at the bottom of the drill hole with a critical value and a zero scale value, and the continuous pressurization is stopped after the extraction negative pressure is converted from positive pressure to negative pressure; the gas extraction system also comprises an economic applicability judgment unit 16 electrically connected with the processor mainboard 11, so that all supercharging behaviors can be ensured to be within the range of the economic capability of a mine, and the unfavorable conditions of high cost and low return are avoided.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present application. Furthermore, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the disclosure to the particular forms disclosed. Similar or identical methods, structures and the like, or several technical deductions or substitutions made on the premise of the conception of the application, should be regarded as the protection scope of the application.
Claims (10)
1. An auxiliary directional long borehole gas extraction method is characterized by comprising the following steps:
step S1: assembling a gas extraction pump, an abnormality judgment unit, a distance measurement unit, a pressurization unit, an early warning unit and an economic applicability judgment unit, constructing a directional long-drill-hole gas extraction platform, installing sensors in the whole drill hole section, and numbering to obtain the extraction pressure and the gas concentration of the whole drill hole section;
step S2: the abnormality judgment unit judges whether the sensor in the step S1 returns abnormal data or not;
if yes, performing step S3, otherwise, performing step S8;
s3, judging whether the abnormal condition is caused by the mining depth by an abnormal judgment unit according to the actual sensor condition of the abnormal data returned in the step S2;
if so, performing the step S4, otherwise, sending an alarm signal to the terminal by the early warning unit, performing maintenance, and returning to the step S1 after the normal operation of the gas extraction platform is recovered;
and step S4: in the one or more sensors returning abnormal data in the step S3, the distance measuring unit determines the abnormal sensor closest to the drilling hole and judges that the abnormal sensor is positioned at the position of the drilling hole, and the pressurizing unit performs pressurization at a corresponding speed according to the position of the drilling hole and monitors whether the pressure at the bottom of the drilling hole is reduced or not in real time;
if so, entering the step S5, otherwise, sending an alarm signal to the terminal by the early warning unit, carrying out maintenance, and returning to the step S1 after the normal operation of the gas extraction platform is recovered;
step S5: the abnormality judgment unit judges whether the pressure detected by the drill hole bottom sensor is close to 1KPa or not;
if yes, reducing the supercharging speed and entering step S6, otherwise, increasing the supercharging speed and returning to step S4;
step S6: the abnormality judgment unit judges whether the pressure detected by the drill hole bottom sensor is negative pressure;
if so, stopping pressurizing and entering the step S7, otherwise, sending a signal to the terminal to remind a technician to check;
step S7: the economic applicability judging unit judges whether the threshold value is in the economic operation threshold value of the actual field gas extraction pump;
if yes, the step S8 is carried out, otherwise, the early warning unit sends an alarm signal to the terminal, and the extraction scheme is reset;
step S8: and (5) normally running.
2. The method for extracting the gas in the auxiliary directional long borehole according to claim 1, wherein the abnormal data in the step S2 are comprehensively judged according to the pressure and the number of the sensors.
3. The method for extracting the gas from the auxiliary directional long borehole according to claim 1, wherein in the step S3, the step of judging whether the abnormal condition is caused by the mining depth is as follows:
step S31: if the pressure of the sensors starting from a certain sensor and located at the position of the sensor and facing the bottom of the drill hole is positive and gradually increased, the abnormality is considered to be caused by the mining depth of the drill hole; otherwise, if the pressure of the individual sensor is abnormal, the gas extraction platform is stopped and whether the gas extraction platform is normal or not is checked.
4. The method for extracting the gas in the auxiliary directional long borehole according to claim 1, wherein the position of the full-borehole section where the sensor is located in step S4 is divided equally into a near section, a middle section and a far section according to the depth of the borehole on site.
5. The auxiliary directional long borehole gas extraction method according to claim 4, characterized in that when the abnormal sensor is located at the near segment, pressurization is performed at an interval of 0.5KPa; when the abnormal sensor is positioned in the middle section, pressurizing at an interval of 0.3 KPa; when the abnormality sensor is located at the far stage, the pressure is increased at an interval of 0.1 KPa.
6. The auxiliary directional long borehole gas extraction method according to claim 1, wherein the basis for determining the time field gas extraction economic operation threshold in step S7 comprises: the cost consumed by the operation of the gas extraction pump is within the economic burden range of mineral products, and the operation efficiency of the gas extraction pump is not lower than 60%.
7. The utility model provides an auxiliary directional long drilling gas drainage system, its characterized in that, include with treater (1) that the gas drainage pump electricity is connected and install in the drilling full bore section and with sensor (2) that treater (1) electricity is connected, treater (1) including with treater mainboard (11) and integrated in unusual judgement unit (12), distance measurement unit (13), pressure boost unit (14) and early warning unit (15) on treater mainboard (11), sensor (2) respectively with unusual judgement unit (12), distance measurement unit (13) electricity is connected.
8. The auxiliary directional long-borehole gas extraction system according to claim 7, characterized in that the sensor (2) is integrated with a pressure detection module (21) and a gas concentration detection module (22).
9. The auxiliary directional long borehole gas extraction system according to claim 7, characterized in that the pressurization unit (14) comprises a primary pressurization module (141) and a secondary pressurization module (142), the primary pressurization module (141) is electrically connected with the distance measurement unit (13) through the processor main board (11), and the secondary pressurization module (142) is electrically connected with the sensor (2) at the bottom of the borehole through the processor main board (11).
10. The auxiliary directional long-borehole gas extraction system according to claim 7, further comprising an economic applicability judging unit (16) electrically connected to the processor main board (11).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211164307.6A CN115467703B (en) | 2022-09-23 | Auxiliary directional long-borehole gas extraction method and system | |
| ZA2023/03898A ZA202303898B (en) | 2022-09-23 | 2023-03-28 | Method and system for gas extraction through auxiliary directional long borehole |
Applications Claiming Priority (1)
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| CN202211164307.6A CN115467703B (en) | 2022-09-23 | Auxiliary directional long-borehole gas extraction method and system |
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