CN114016912B - Device and method for detecting water level while drilling in underground coal mine directional drilling - Google Patents
Device and method for detecting water level while drilling in underground coal mine directional drilling Download PDFInfo
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- CN114016912B CN114016912B CN202111282594.6A CN202111282594A CN114016912B CN 114016912 B CN114016912 B CN 114016912B CN 202111282594 A CN202111282594 A CN 202111282594A CN 114016912 B CN114016912 B CN 114016912B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000005553 drilling Methods 0.000 title claims abstract description 75
- 239000003245 coal Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 131
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 210000002445 nipple Anatomy 0.000 claims description 24
- 239000000523 sample Substances 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 14
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 4
- 238000005065 mining Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/028—Electrical or electro-magnetic connections
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/028—Electrical or electro-magnetic connections
- E21B17/0285—Electrical or electro-magnetic connections characterised by electrically insulating elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/113—Locating fluid leaks, intrusions or movements using electrical indications; using light radiations
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a device and a method for detecting the water level while drilling of underground directional drilling of a coal mine, wherein the device comprises a detection device and a monitoring module for monitoring the current in a loop of the detection device; the detection device comprises a cable water feeder, a cable drill rod, an upper non-magnetic drill rod, a detection short section, a measurement short section, a lower non-magnetic drill rod, a screw motor and a drill bit which are coaxially connected in sequence; the detection short section comprises a detection short section outer pipe and a detection short section inner core, and the detection short section inner core is arranged in the detection short section outer pipe; the detection device has the advantages that the change of the underground directional drilling tool is small, and when the water level is detected, the water level detection can be realized only by reversely inserting the quick plug connector of the cable-connected water feeder of the coal mine.
Description
Technical Field
The invention belongs to the technical field of directional drilling, and particularly relates to a device and a method for detecting the water level while drilling of underground directional drilling of a coal mine.
Background
China's coal mining is threatened by water damage for a long time, and the water damage becomes the second largest coal mine killer second to gas accidents, and the safe and efficient mining of coal mines is severely restricted. The national coal mine monitoring bureau pays high attention to the water damage problem, establishes sixteen-character principles of prediction and forecast, doubtful detection, detection before excavation and treatment before mining for preventing and treating the water damage of the coal mine, and takes advanced detection and treatment of hidden disaster-causing water sources of the coal mine as important measures for preventing water damage accidents by various coal enterprises. The advanced exploration of the concealed disaster-causing water source of the coal mine mainly comprises technical means such as geophysical prospecting, chemical exploration and drilling, and a comprehensive exploration technical system of 'geophysical prospecting first, drilling verification and chemical exploration follow-up' is generally adopted in practical application.
The underground drilling of the coal mine is the most direct and effective method for exploring a concealed disaster-causing water source, and particularly, the directional drilling technology is introduced into the underground coal mine, so that the method becomes an important technical means for preventing and treating water hazards in the coal mine and exploring concealed disaster-causing factors by the technical advantages of high drilling efficiency, large drilling depth, accurate and controllable drilling track, multi-branch construction in one hole and the like. The underground directional drilling of the coal mine is utilized to detect the accumulated water in the goaf, the structural zone is filled with water and the water level of the aquifer has the advantages of high detection precision, long detection distance, short detection period, capability of utilizing the directional drilling to perform advanced treatment and the like, but also has some defects in practical application, and is mainly represented as follows: in the current stage, when a directional drilling technology is utilized to conduct advanced exploration on a gob area, a tectonic zone, an aquifer and other water source areas which may have hidden disasters, when the elevation of an orifice of a explored directional drilling hole is higher than the elevation of underground accumulated water, the underground accumulated water cannot return from the orifice, whether the explored area is accumulated water or not is judged at the moment, a special instrument is required to be put into the hole to detect the water level in the hole after the drilling hole is lifted, if the stratum conditions around the underground water at the drilling hole are poor, hole collapse and shrinkage are easy to occur after the drilling hole is lifted, the detection instrument is difficult to put into the hole to complete water level exploration, and the analysis and treatment effects of the hidden disasters-causing water sources are influenced.
Disclosure of Invention
The invention provides a device and a method for detecting the water level while drilling in the underground directional drilling of a coal mine, which aim to solve the technical problem.
In order to solve the technical problems, the invention adopts the following technical scheme:
a water level detection device while drilling for directional drilling in an underground coal mine comprises a detection device and a monitoring module for monitoring current in a loop of the detection device; the detection device comprises a cable water feeder, a cable drill rod, an upper non-magnetic drill rod, a detection short section, a measurement short section, a lower non-magnetic drill rod, a screw motor and a drill bit which are coaxially connected in sequence;
the detection short section comprises a detection short section outer pipe and a detection short section inner core, the detection short section inner core is arranged in the detection short section outer pipe, and a channel for flowing flushing liquid is arranged between the detection short section inner core and the inner wall of the detection short section outer pipe;
a first through hole is formed in the pipe wall of the outer pipe of the detection short section along the radial direction of the outer pipe, an insulating sleeve is arranged in the first through hole, one end of the insulating sleeve extends to be in contact with the outer wall of the inner core of the detection short section, a flange is arranged at the other end of the insulating sleeve, the flange is arranged on the outer wall of the outer pipe of the detection short section, and a contact is nested on the insulating sleeve;
the outer surface of the inner core of the detection short section is wrapped with an insulating layer, a branch which is communicated with the contact and a main path which is communicated with the inner core of the non-magnetic drill rod and the inner core of the probe tube of the measurement short section are arranged in the inner core of the detection short section, and the branch is connected with the main path in parallel;
the cable-through water feeder is connected with the monitoring module through a quick connector, the quick connector comprises an anode and a cathode, when the quick connector is connected positively, the anode is communicated with the inner core of the cable-through water feeder, and the cathode is communicated with the outer wall of the cable-through water feeder; when the quick connector is reversely connected, the positive electrode is communicated with the outer wall of the cable-through water feeder, and the negative electrode is communicated with the inner core of the cable-through water feeder.
Specifically, two diodes connected in parallel are arranged in the inner core of the detection short section, wherein one diode is connected between two ends of the inner core of the detection short section in a forward direction to form the main circuit; and the other diode is reversely connected between the inner core of the detection short section and the contact to form the branch.
Specifically, the contact is a metal plate attached to the outer wall of the outer pipe of the detection nipple, and a metal rod which can be inserted into the insulating sleeve and is conducted with the branch is arranged on the metal plate.
The detection short section inner core is supported in the detection short section outer tube through a support, the support is made of an insulating material, and a flowing hole for flowing of flushing liquid is formed in the support.
Preferably, a first groove is formed in the outer wall of the outer pipe of the detection short section around the first through hole, the flange is nested in the first groove, and a second groove is formed in the flange around the central axis of the insulating sleeve and used for nesting the contact.
The measuring short section comprises a probe inner core and an instrument outer tube, the probe inner core is arranged in the instrument outer tube through a fixing sleeve and a centralizer, the fixing sleeve can be communicated with the probe inner core and the instrument outer tube, and the centralizer is made of an insulating material.
The invention also discloses a method for detecting the water level while drilling of the underground directional drilling of the coal mine, which adopts the device for detecting the water level while drilling of the underground directional drilling of the coal mine to detect the water level, and the specific method comprises the following steps:
when normal directional drilling is carried out, the quick connector is connected positively, the drill bit is driven to break rock through the hole bottom screw motor, inclination measurement is completed through the measuring short section, and drilling track data are stored;
when the situation of water in the hole or in the abnormal geological volume needs to be detected, the quick connector is reversely connected, the current value in the loop of the detection device is monitored through the monitoring module, whether the circuit in the hole is connected or not is judged, the drilling tool in the hole is rotated repeatedly by a small angle, if the circuit is stably connected, the situation and the position of the water in the hole or in the abnormal geological volume are judged by combining with the drilling track data; if the circuit is disconnected, no water is accumulated at the detection short section.
Compared with the prior art, the invention has the beneficial effects that:
(1) The device and the method can realize the detection of the water level while drilling, avoid the difficulty in lowering the detection instrument and the repeated operation of lifting and lowering the drill caused by the instability of the hole wall, greatly reduce the detection workload, provide support for the detection of the water level of geological abnormal bodies such as a coal mine goaf, a collapse column, a fault, a burned rock and the like, and have important significance for the advanced detection and treatment of the water damage of the coal mine.
(2) The detection device of the invention has small change to the directional drilling tool under the coal mine, a detection short section is added between the upper non-magnetic drilling rod and the outer pipe of the instrument of the original drilling tool combination, and when the water level is detected, the water level detection can be realized only by reversely inserting the quick-connection plug of the cable water feeder;
(3) The detection device provided by the invention has the advantages of simple structure, ingenious design, small processing and maintenance difficulty and low manufacturing cost, can fully utilize the existing drilling equipment, and can greatly reduce the detection cost after being applied to the field of detection of concealed disaster-causing water sources.
Other advantages of the present invention are described in detail in the detailed description of the embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a water level detection while drilling device for directional drilling in an underground coal mine, which is shown in an embodiment of the invention.
Figure 2 is a longitudinal section view of a probe sub shown in an embodiment of the invention.
Fig. 3 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2.
Fig. 4 is a sectional view taken along line B-B of fig. 2.
Figure 5 is a longitudinal section of a measuring nipple shown in an embodiment of the invention.
Fig. 6 is a schematic view of a cabled water feeder according to an embodiment of the present invention.
Fig. 7 is an enlarged view of a portion of the quick connect plug of the cabled water feeder of fig. 6.
The various reference numbers in the figures illustrate:
1-a cable water feeder, 2-a cable drill rod, 3-an upper non-magnetic drill rod, 4-a detection short section, 5-a measurement short section, 6-a lower non-magnetic drill rod, 7-a screw motor, 8-a drill bit, 9-a quick connector and 10-a control center;
11-a cable-through water feeder inner core, 12-a cable-through water feeder outer wall and 13-a water inlet;
41-detection short section outer tube, 42-detection short section inner core, 43-insulation sleeve, 44-contact, 45-channel and 46-bracket;
411 — first via; 421-branch, 422-main; 431-flange; 461-flow orifice;
51-probe inner core, 52-instrument outer tube, 53-fixing sleeve, 54-centralizer
91-positive electrode, 92-negative electrode.
Detailed Description
The following description of the present invention is provided for the purpose of illustration, and unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be construed broadly and may include, for example, a fixed connection or a detachable connection or an integral connection; either a direct connection or an indirect connection, and the like. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.
In the present invention, unless otherwise specified, the terms of orientation such as "upper, lower, bottom, top" are generally defined with reference to the drawing plane of the corresponding drawing, "inner and outer" are defined with reference to the outline of the corresponding drawing, and "front and rear" are defined with reference to the gas flow direction.
The present invention is not limited to the following embodiments, and various specific technical features described in the following embodiments may be combined in any suitable manner without contradiction as long as they do not depart from the gist of the present invention, and should also be regarded as being disclosed in the present invention.
Example 1
The embodiment discloses a water level detection device while drilling for directional drilling in an underground coal mine, which comprises a detection device and a monitoring module, wherein the monitoring module is used for monitoring the size of a circuit in a loop of the detection device.
As shown in fig. 1, the detection device comprises a cable water feeder 1, a cable drill rod 2, an upper non-magnetic drill rod 3, a detection short section 4, a measurement short section 5, a lower non-magnetic drill rod 6, a screw motor 7 and a drill bit 8 which are coaxially connected in sequence, wherein an outer pipe of the cable water feeder 1, an outer pipe of the cable drill rod 2, an outer pipe of the upper non-magnetic drill rod 3, an outer pipe of the detection short section 4 and an outer pipe of the measurement short section 5 are all connected through screw threads.
The cable-through water feeder 1, the cable-through drill rod 2, the upper non-magnetic drill rod 3, the detecting short section 4 and the measuring short section 5 are all provided with an outer wall and an inner core, except the inner core 11, the cable-through water feeder 1 of the embodiment has the similar structure to the common water feeder structure on the market, and is provided with a water inlet 13 for drilling flushing fluid to enter; the cabled drill rod 2 and the upper non-magnetic drill rod 3 are of conventional structures.
As shown in fig. 2 and fig. 3, the detection nipple 4 of this embodiment is set to be a cable passing structure, including detection nipple outer tube 41 and detection nipple inner core 42, detection nipple inner core 42 is set in detection nipple outer tube 41, be provided with channel 45 for the circulation of flushing liquid between detection nipple inner core 42 and the detection nipple outer tube 41 inner wall, it is concrete, detection nipple inner core 42 is supported in detection nipple outer tube 41 through support 46, support 46 is made by insulating material, support 46 is specifically an annular supporting block, as shown in fig. 4, the inner wall and the outer wall of annular supporting block respectively with detection nipple inner core 42 and detection nipple outer tube 41 fixed connection, be provided with through-flow holes 461 for the circulation of flushing liquid on the annular supporting block, through-flow holes 461 are arranged around its circumferencial direction interval.
The detection short section outer tube 41 is made of a non-magnetic material, a first through hole 411 is formed in the tube wall of the detection short section outer tube 41 along the radial direction of the tube wall, an insulating sleeve 43 is arranged in the first through hole 411, one end of the insulating sleeve 43 extends to be in contact with the outer wall of the detection short section inner core 42, a flange 431 is arranged at the other end of the insulating sleeve 43, and the whole cross section of the insulating sleeve 43 is T-shaped.
The flange 431 is arranged on the outer wall of the detection short section outer pipe 41, the flange 431 of the insulating sleeve 43 is nested with the contact 44, and the insulating sleeve 43 ensures that the contact 44 is conducted with a branch in the detection short section inner core 42 and is insulated from flushing liquid in the detection short section outer pipe 41 and the cavity; specifically, the contact 44 is a metal plate attached to the outer wall of the short section detection outer tube 41, a metal rod which can be inserted into the insulating sleeve 43 and is connected to the branch 421 is arranged on the metal plate, the metal rod can be a common metal screw, a center hole is formed in the metal plate, and the metal screw is connected to the branch 421 through the center hole of the metal plate during installation.
A first groove (not marked in the figure) is arranged on the outer wall of the detection nipple outer pipe 41 around the first through hole 411, the flange 431 is nested in the first groove, so that the outer side surface of the flange 431 is flush with the outer wall surface of the detection nipple outer pipe 41, a second groove (not marked in the figure) is arranged on the flange 431 around the center of the insulating sleeve 43, and the contact 44 is nested in the second groove, so that the outer side surface of the contact 44 is flush with the outer wall surface of the detection nipple outer pipe 41.
The outer surface of the detection short section inner core 42 is wrapped by an insulation layer to ensure that the detection short section inner core 42 is insulated from the detection short section outer tube 41 and flushing fluid, a branch 421 which is communicated with the contact 44 and a main path 422 which is communicated with the inner core of the non-magnetic drill rod 3 and the inner core of the probe tube of the measurement short section 5 are arranged in the detection short section inner core 42, and the branch 421 and the main path 422 are connected in parallel. Specifically, two diodes connected in parallel are arranged in the detection short section inner core 42, wherein one diode is connected between two ends of the detection short section inner core 42 in the forward direction to form a main path 422, so that the current from the upper non-magnetic drill rod 3 inner core to the probe inner core 51 of the measurement short section 5 can pass through; and the other diode is reversely connected between the inner core 42 of the detecting short section and the contact 44 to form a branch 421, so that the current from the contact 44 to the inner core of the upper non-magnetic drill pipe 3 can pass through.
The measuring nipple 5 comprises a probe inner core 51 and an instrument outer tube 52, as shown in fig. 5, the probe inner core 51 is mounted on a central axis of the instrument outer tube 52 through a fixing sleeve 53 and a centralizer 54, the fixing sleeve 53 can conduct the probe inner core 51 and the instrument outer tube 52, and the centralizer 54 is made of an insulating material.
The cable water feeder 1, the cable drill rod 2 and the upper non-magnetic drill rod 3 are respectively provided with an inner core which is also arranged in the outer pipe through a bracket, the bracket is made of insulating materials as the same as the bracket in the detection short section 4, and through holes are arranged on the bracket for free circulation of flushing liquid.
The cable water feeder 1 is connected with the monitoring module through a quick connector 9, as shown in fig. 7, the quick connector 9 comprises an anode 91 and a cathode 92, when the quick connector 9 is connected positively, as shown in fig. 6, the anode 91 is communicated with the cable water feeder inner core 11, and the cathode 92 is communicated with the cable water feeder outer wall 12; when the quick connector 9 is reversely connected, the positive pole 91 is communicated with the outer wall 12 of the cable-through water feeder, and the negative pole 92 is communicated with the inner core 11 of the cable-through water feeder. Generally, during normal drilling, the quick connector 9 is connected positively, and at the moment, the main path 422 in the detection short section inner core 42 is conducted; when the water level in the hole needs to be detected, the quick connector 9 is reversely connected, if the circuit is stably connected, the branch 421 is connected, the water is accumulated in the hole and is located at the detection short section 4, and if the circuit is disconnected, the water is not accumulated at the detection short section 4.
In this embodiment, the monitoring module is integrated in the control center 10, the control center 10 is further provided with an inclinometer module capable of being used in cooperation with the measurement probe, and the control center 10 has a function of providing stable voltage for the quick connector 9.
Example 2
The embodiment discloses a method for detecting the water level while drilling in underground coal mine directional drilling, which is characterized in that the water level is detected by using the device for detecting the water level while drilling in underground coal mine directional drilling described in embodiment 1, and the specific method comprises the following steps:
when normal directional drilling is carried out, the quick-connection plug 9 is connected positively, the drill bit 8 is driven to crush rock through the hole bottom screw motor 7, inclination measurement is completed through the measuring short section 5 matched with an inclination measurement module of a control center, and drilling track data are stored;
when the situation of water in the hole or in the abnormal geological volume needs to be detected, the quick-connect plug 9 is reversely connected, the current value in the loop of the detection device is monitored through the monitoring module of the control center 10, whether the circuit in the hole is connected or not is judged, the drilling tool in the hole is rotated repeatedly by a small angle, if the circuit is stably connected, the situation that water exists in the detection short section 4 is judged, the contact 44 and the detection short section outer tube 41 are conducted by the water, and the situation and the position of the water in the hole or in the abnormal geological volume are judged by combining with the drilling track data; if the circuit is disconnected, no water is accumulated at the detection short section.
It can be seen that when the detection device and the method are used for detecting the water level, the water level detection can be realized only by reversely inserting the quick connector 9 on the cable water feeder 1, the operation is convenient, and the detection workload is greatly reduced.
Claims (7)
1. The underground directional drilling while-drilling water level detection device for the coal mine is characterized by comprising a detection device and a monitoring module for monitoring current in a loop of the detection device;
the detection device comprises a cable water feeder (1), a cable drill rod (2), an upper non-magnetic drill rod (3), a detection short section (4), a measurement short section (5), a lower non-magnetic drill rod (6), a screw motor (7) and a drill bit (8) which are coaxially connected in sequence;
the detection short section (4) comprises a detection short section outer tube (41) and a detection short section inner core (42), the detection short section inner core (42) is arranged in the detection short section outer tube (41), and a channel (45) for flowing flushing liquid is arranged between the detection short section inner core (42) and the inner wall of the detection short section outer tube (41);
a first through hole (411) is formed in the pipe wall of the outer pipe (41) of the detection short section along the radial direction of the pipe wall, an insulating sleeve (43) is arranged in the first through hole (411), one end of the insulating sleeve (43) extends to be in contact with the outer wall of the inner core (42) of the detection short section, a flange (431) is arranged at the other end of the insulating sleeve, the flange (431) is arranged on the outer wall of the outer pipe (41) of the detection short section, and a contact (44) is nested on the insulating sleeve (43);
the outer surface of the detection short section inner core (42) is wrapped with an insulating layer, a branch circuit (421) communicated with the contact (44) and a main circuit (422) communicated with the inner core of the non-magnetic drill rod (3) and the probe inner core of the measurement short section (5) are arranged in the detection short section inner core (42), and the branch circuit (421) is connected with the main circuit (422) in parallel;
the cabled water feeder (1) is connected with the monitoring module through a quick connector (9), the quick connector (9) comprises an anode (91) and a cathode (92), when the quick connector (9) is positively connected, the anode (91) is communicated with the cabled water feeder inner core (11), and the cathode (92) is communicated with the cabled water feeder outer wall (12); when the quick connector (9) is reversely connected, the positive electrode (91) is communicated with the outer wall (12) of the cable-through water feeder, and the negative electrode (92) is communicated with the inner core (11) of the cable-through water feeder.
2. The water level detection device while drilling for directional drilling in underground coal mine according to claim 1, characterized in that two parallel diodes are arranged in the detection nipple inner core (42), wherein one diode is connected between two ends of the detection nipple inner core (42) in forward direction to form the main path (422); and the other diode is reversely connected between the probe short section inner core (42) and the contact (44) to form the branch (421).
3. The device for detecting the water level while drilling in the underground directional drilling of the coal mine according to claim 1, wherein the contact (44) is a metal plate attached to the outer wall of the outer pipe (41) of the detection nipple, and a metal rod which can be inserted into the insulating sleeve (43) and is communicated with the branch (421) is arranged on the metal plate.
4. The water level detection while drilling device for underground directional drilling of a coal mine according to claim 1, characterized in that the inner core (42) of the detection nipple is supported in the outer pipe (41) of the detection nipple through a support (46), the support (46) is made of insulating materials, and the support (46) is provided with a through hole (461) for flowing of flushing liquid.
5. The water level detection device while drilling for directional drilling in the underground coal mine according to claim 1, characterized in that a first groove is arranged on the outer wall of the outer pipe (41) of the detection nipple around the first through hole (411), the flange (431) is nested in the first groove, and a second groove is arranged on the flange (431) around the central axis of the insulating sleeve (43) and is used for nesting the contact (44).
6. The device for detecting the water level while drilling in the underground directional drilling of the coal mine according to claim 1, wherein the measuring nipple (5) comprises a probe inner core (51) and an instrument outer tube (52), the probe inner core (51) is arranged in the instrument outer tube (52) through a fixing sleeve (53) and a centralizer (54), the fixing sleeve (53) can conduct the probe inner core (51) and the instrument outer tube (52), and the centralizer (54) is made of an insulating material.
7. A method for detecting the water level while drilling of underground coal mine directional drilling is characterized in that the water level is detected by the device for detecting the water level while drilling of underground coal mine directional drilling according to any one of claims 1 to 6, and the specific method comprises the following steps:
when normal directional drilling is carried out, the quick plug connector (9) is connected positively, the drill bit (8) is driven to break rock through the hole bottom screw motor (7), inclination measurement is completed through the measuring short section (5), and drilling track data are stored;
when the water in the hole or the abnormal geological volume is required to be detected, the quick connector (9) is reversely connected, the current value in the loop of the detection device is monitored through the monitoring module, whether the circuit in the hole is connected or not is judged, the drilling tool in the hole is rotated repeatedly by a small angle, if the circuit is stably connected, the water is detected at the short section (4), and the water in the hole or the abnormal geological volume and the position are judged by combining the drilling track data; if the circuit is disconnected, no water is accumulated at the detection short section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111282594.6A CN114016912B (en) | 2021-11-01 | 2021-11-01 | Device and method for detecting water level while drilling in underground coal mine directional drilling |
Applications Claiming Priority (1)
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