CN110593853B - System and method for continuously conveying non-isodiametric detection cables of directional long drill holes in underground coal mine - Google Patents
System and method for continuously conveying non-isodiametric detection cables of directional long drill holes in underground coal mine Download PDFInfo
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- CN110593853B CN110593853B CN201910893028.5A CN201910893028A CN110593853B CN 110593853 B CN110593853 B CN 110593853B CN 201910893028 A CN201910893028 A CN 201910893028A CN 110593853 B CN110593853 B CN 110593853B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/14—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for displacing a cable or cable-operated tool, e.g. for logging or perforating operations in deviated wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses a system and a method for continuously conveying a coal mine underground directional long borehole unequal diameter detection cable, wherein the system comprises a conveying channel unit and a conveyed unit; the conveying channel unit comprises a wire feeder, a drill rod and a drill bit which are coaxially and sequentially connected; the conveyed unit comprises a conveyor which can move in the drill rod and is sequentially arranged along the direction from the drill rod to the drill bit and a suspension device which is used for connecting the end part of the cable and can be suspended on the wall of the drilling hole to fix the cable; a cavity between the first opening and closing valve core and the annular sealing piece is a sealing cavity, so that water enters the sealing cavity from the water inlet hole and then pushes the conveyor to drive the cable to move forwards. After the pump is started to pump water, high-pressure water enters the sealed cavity from the water inlet hole, and the conveyor drives the cable to move towards the bottom of the hole under the action of the water pressure. The invention realizes the function of the detection cable in the long distance hole of the directional long borehole in the coal mine; the problem of continuous sealing of the non-equal-diameter cables in the conveying process is also solved, and the automation level and efficiency of cable descending are improved.
Description
Technical Field
The invention relates to the field of underground coal mine drilling engineering and geophysical exploration engineering, in particular to a system and a method for continuously conveying a non-isometric detection cable for an underground coal mine directional long drill hole.
Background
Along with the continuous improvement of the requirement of coal mine enterprise to accurate, the exploration that becomes more meticulous, provide the passageway through directional long drilling for detecting instrument, can accurate effectively explore the geology condition. The in-hole peeping instrument and the audio frequency electric transmission cable are gradually popularized in a coal mine underground borehole, and meanwhile, the directional long borehole is rapidly popularized in the coal mine underground in recent years due to the fact that the exploration distance is long and the track is accurate and controllable. The problem of unequal diameters of measuring electrodes and cables exists for the audio frequency electric transmission cables, and the dense arrangement of the measuring electrodes (1 section/20 m) causes difficulty in automatic continuous conveying due to the problems of sealing, blockage and the like. Therefore, the method and the device realize the continuous conveying of the non-equal-diameter cable in the long-distance hole of the directional long drilling hole, and have important significance for accurately, efficiently and long-distance exploration of the potential safety production hazards of the coal mine. Due to the fact that the flexibility of the cable is large, when the cable is pushed to a certain depth through the orifice, excessive friction is easily generated due to buckling of the cable, and therefore the near-horizontal directional drilling cannot be directly pushed down in a long distance. The conventional conveying method is to manually convey the cable into the hole by means of a sieve tube or a push rod, penetrate the cable into the sieve tube and then descend to the bottom of the hole through a large-through-hole drill rod inner hole, or the push rod and the cable are fixed together, and the push rod is manually pushed and drives the cable to convey into the hole. The prior art has the following defects: (1) the drilling depth is shallow, generally the drilling is carried out in a conventional rotary drilling hole, and the depth is generally not more than 150 m; (2) the conveying mode has low automation degree and low efficiency.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a system and a method for continuously conveying a non-isodiametric detection cable in a directional long borehole in a coal mine, which overcome the problems and defects of shallow underground penetration depth, low automation degree and efficiency and the like in the prior art and realize the continuous conveying in a long-distance cable hole in the directional long borehole in the coal mine.
In order to achieve the purpose, the invention adopts the following technical scheme:
a coal mine underground directional long borehole non-equal diameter detection cable continuous conveying system comprises a conveying channel unit and a conveyed unit;
the conveying channel unit comprises a wire feeder, a drill rod and a drill bit which are coaxially and sequentially connected;
the wire feeder comprises a cylindrical water feeding body, a water inlet hole is formed in the side wall of the water feeding body, two ends of the water feeding body are respectively connected with the drill rod and the sealing body, and a first opening and closing valve core which is tightly attached to the inner wall of the water feeding body and is through in the center is arranged in the water feeding body; the end part of the first opening and closing valve core is tightly attached to the end part of the sealing body, a second opening and closing valve core which is tightly attached to the inner wall of the sealing body and is through in the center is arranged in the sealing body, and first locking nuts are arranged at the end parts of the second opening and closing valve core and the sealing body; the first locking nut, the second opening and closing valve core, the sealing body, the first opening and closing valve core and the water supply body are coaxial and form a cable channel which is communicated along a central axis, and a cable can penetrate through and cling to the first opening and closing valve core and the second opening and closing valve core to realize the sealing of the sealing end of the water supply body;
the conveyed unit comprises a conveyor which can move in the drill rod and is sequentially arranged along the direction from the drill rod to the drill bit and a suspension device which is used for connecting the end part of the cable and can be suspended on the wall of the drill hole to fix the cable;
the conveyor comprises a conveying body with a through center, an annular sealing element, a slip and a second locking nut, wherein the annular sealing element is sleeved on the outer wall of the conveying body and can be tightly attached to the inner wall of a drill rod; the conveying body, the slip and the second locking nut are coaxial and are communicated along the central axis so that the cable can penetrate through the conveying body, the slip is used for clamping and fixing the cable;
and a cavity between the first opening and closing valve core and the annular sealing element is a sealing cavity so that water enters the sealing cavity from the water inlet hole and then pushes the conveyor to drive the cable to move forwards.
The invention also comprises the following technical characteristics:
specifically, a conical limiting table coaxial with the water feeding body is arranged on the inner wall of the water feeding body, the necking of the conical limiting table of the water feeding body faces the drill bit, and the outer wall of the first opening and closing valve core is of a conical structure and is tightly fitted in the conical limiting table of the water feeding body to realize axial positioning;
the inner wall of the sealing body is provided with a conical limiting table coaxial with the sealing body, the necking of the conical limiting table of the sealing body faces the drill bit, and the outer wall of the second opening and closing valve core is of a conical structure and is assembled in a tightly-fitting mode in the conical limiting table of the sealing body to achieve axial positioning.
Specifically, the inner diameters of the first opening-closing valve core and the second opening-closing valve core are not larger than the diameter of the cable, so that the cable is sealed with the first opening-closing valve core and the second opening-closing valve core in the advancing process of the cable.
Specifically, two columnar bulges are arranged on the cable, and the diameter of each columnar bulge is larger than that of the cable; the first opening and closing valve core and the second opening and closing valve core can expand; the columnar bulges can enlarge the first opening and closing valve core and the second opening and closing valve core when passing through the first opening and closing valve core and the second opening and closing valve core, and the inner holes of the first opening and closing valve core and the second opening and closing valve core are reduced to the original size for sealing the cable;
the distance between the two columnar bulges is smaller than the distance between the first opening-closing valve core and the second opening-closing valve core; when the columnar bulge props up the inner hole through the first opening and closing valve core, the cable body passes through the second opening and closing valve core to play a role in sealing; on the contrary, when the columnar bulge struts the inner hole through the second opening and closing valve core, the cable body passes through the first opening and closing valve core to play a sealing role; the first opening and closing valve core and the second opening and closing valve core ensure that at least one is sealed.
Specifically, a notch is processed on the slip, the outer wall of the slip is of a conical structure, and the inner wall of a conveying body where the slip is located is a conical inner wall matched with the outer wall of the slip; under the action of the second locking nut axially compressing the slips and the conical inner wall of the conveying body, the slip notch gap is reduced, and then the inner hole of the slips is reduced to extrude the cable to generate friction so that the cable is fixed on the conveyor.
The invention also provides a method for continuously conveying the non-isometric detection cable of the directional long borehole in the underground coal mine, which is realized by adopting the system and specifically comprises the following steps:
the first step is as follows: after the directional long drilling is constructed, carrying out long-time punching and then extracting all drilling tools in the hole;
the second step is that: installing a drill bit and a drill rod, and drilling down to a position 2-3 m away from the bottom of the hole;
the third step: the cable penetrates out of the wire feeder, a multi-stage suspension device and a conveyor are mounted at the front end of the cable, and a second locking nut is screwed;
the fourth step: the wire feeder is manually fed into an inner hole of the drill rod by the conveying unit, and then the wire feeder is firmly connected with the drill rod;
the fifth step: the pump is started to pump water, the conveyor moves towards the bottom of the hole under the action of water pressure, the pressure and the cable allowance on the roller are observed, and cables are automatically and continuously conveyed towards the bottom of the hole;
and a sixth step: when the water pressure suddenly drops and the cable is confirmed to be conveyed to the bottom of the hole through the cable allowance on the roller, cutting off the cable outside the hole, detaching the wire feeder, and taking out the drill rod and the drill bit in the hole; the hanging device is hung on the hole wall to play a role in fixing, and the cable, the conveyor and the hanging device are not lifted out along with the drill rod.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention realizes the function of the cable for detection in the long distance hole of the directional long borehole in the coal mine; the problem of continuous sealing of the non-equal-diameter cables in the conveying process is also solved, and the automation level and efficiency of cable descending are improved.
In the wire feeder, the first locking nut, the second opening and closing valve core, the sealing body, the first opening and closing valve core and the water feeding body are coaxial and form a cable channel which is communicated along a central axis, and a cable can penetrate through and cling to the first opening and closing valve core and the second opening and closing valve core to realize the sealing of the sealing end of the water feeding body; the cavity between the first opening and closing valve core and the annular sealing element is a sealing cavity so that water enters the sealing cavity from the water inlet hole and then pushes the conveyor to drive the cable to move forwards. In the conveyor, the conveying body, the slip and the second locking nut are coaxial and penetrate through the central axis so as to enable the cable to pass through, and the slip is used for clamping and fixing the cable. After the pump is started to pump water, high-pressure water enters the sealed cavity from the water inlet hole, and the conveyor moves towards the bottom of the hole under the action of water pressure, so that cables are automatically and continuously conveyed to the bottom of the hole.
The conveying depth which can be realized by the system and the method is more than 600m, while the conveying depth of the conventional method is 100-150 m; because the conventional method can not realize the conveying depth of more than 150m, the conventional method needs 2 hours within 150m, the method has the maximum time of 20 minutes, and the invention greatly improves the cable descending depth and efficiency.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the wire feeder structure of the present invention;
FIG. 3 is a schematic view of the conveyor structure of the present invention;
FIG. 4 is a schematic view of the continuous conveyor system of the present invention illustrating continuous conveying operation;
FIG. 5 is a schematic illustration of a continuous conveyor system drill lifting operation of the present invention;
the reference numerals in the figures denote: 1-wire feeder, 2-drill rod, 3-drill bit, 4-conveyor, 5-suspension device, 6-cable, 7-roller, 8-stratum, 9-drilling hole, 10-detection electrode;
11-water supply body, 12-water inlet hole, 13-sealing body, 14-first opening and closing valve core, 15-second opening and closing valve core and 16-first locking nut;
41-conveying body, 42-annular sealing element, 43-slip and 44-second locking nut.
Detailed Description
The following embodiments are given as examples of the present invention, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are included in the protection scope of the present invention.
Example 1:
as shown in fig. 1 to 3, the embodiment provides a continuous conveying system for a non-equal-diameter detection cable of a directional long borehole in an underground coal mine, which comprises a conveying channel unit and a conveyed unit.
The conveying channel unit comprises a wire feeder 1, a drill rod 2 and a drill bit 3 which are coaxially and sequentially connected; the wire feeder 1 comprises a cylindrical water feeding body 11, a water inlet hole 12 is formed in the side wall of the water feeding body 11, two ends of the water feeding body 11 are respectively connected with a drill rod 2 and a sealing body 13, and a first opening-closing valve core 14 which is tightly attached to the inner wall of the water feeding body 11 and is through in the center is arranged in the water feeding body 11; the end part of the first opening and closing valve core 14 is tightly attached to the end part of the sealing body 13, a second opening and closing valve core 15 which is tightly attached to the inner wall of the sealing body 13 and is penetrated through the center is arranged in the sealing body 13, and a first locking nut 16 is arranged at the end parts of the second opening and closing valve core 15 and the sealing body 13; the first lock nut 16 functions to press the second opening/closing valve body 15.
The first locking nut 16, the second opening and closing valve core 15, the sealing body 13, the first opening and closing valve core 14 and the water supply body 11 are coaxial and form a cable channel which penetrates along the central axis, and the cable 6 can penetrate through and cling to the first opening and closing valve core 14 and the second opening and closing valve core 15 to seal the end part of the water supply body.
The conveyed unit comprises a conveyor 4 which can move in the drill rod 2 and is arranged in sequence along the direction from the drill rod 2 to the drill bit 3, and a suspension device 5 which is used for connecting the end part of the cable 6 and can suspend the cable 6 on the wall of the drilling hole to fix the cable 6; the conveyor 4 comprises a conveying body 41 with a through center, an annular sealing element 42 which is sleeved on the outer wall of the conveying body 41 and can be tightly attached to the inner wall of the drill rod 2, a slip 43 arranged in the conveying body 41 and a second locking nut 44 fixed at the end parts of the slip 43 and the conveying body 41; the annular seal 42 functions to prevent water from escaping, building up water pressure.
The conveying body 41, the slip 43 and the second locking nut 44 are coaxial and penetrate along the central axis to enable the cable 6 to pass through, and the slip 43 is used for clamping and fixing the cable 6; the cavity between the first opening and closing valve core 14 and the annular sealing member 42 is a sealed cavity, so that water enters the sealed cavity from the water inlet hole 12 and pushes the conveyor 4 to drive the cable 6 to move forward.
More specifically, in the present embodiment, a screw joint capable of being connected to a high pressure water pipe is provided at the water inlet hole 12 to input high pressure water.
In the embodiment, the inner wall of the water feeding body 11 is provided with a conical limiting table coaxial with the water feeding body 11, the necking of the conical limiting table of the water feeding body 11 faces the drill bit 3, and the outer wall of the first opening and closing valve core 14 is of a conical structure and is tightly fitted in the conical limiting table of the water feeding body 11 to realize axial positioning; the inner wall of the sealing body 13 is provided with a conical limiting table coaxial with the sealing body 13, the necking of the conical limiting table of the sealing body 13 faces the drill bit 3, and the outer wall of the second opening and closing valve core 15 is of a conical structure and is assembled in the conical limiting table of the sealing body 13 in a tightly-fitted mode to achieve axial positioning.
The inner diameters of the first opening-closing valve core 14 and the second opening-closing valve core 15 are not larger than the diameter of the cable 6, so that the cable 6 is sealed with the first opening-closing valve core 14 and the second opening-closing valve core 15 in the advancing process of the cable 6.
Two columnar bulges are arranged on the cable 6, and the diameter of each columnar bulge is larger than that of the cable 6; the first opening and closing valve core 14 and the second opening and closing valve core 15 can expand, the inner diameters of the first opening and closing valve core 14 and the second opening and closing valve core 15 can change under extrusion force, and a sealing effect is achieved under the action of water pressure; when the columnar bulges pass through the first opening-closing valve core 14 and the second opening-closing valve core 15, the first opening-closing valve core 14 and the second opening-closing valve core 15 can be expanded, and after the columnar bulges pass through the inner holes of the first opening-closing valve core 14 and the second opening-closing valve core 15, the inner holes are reduced to original sizes to seal the cable 6; the distance between the two columnar bulges is smaller than the distance between the first opening-closing valve core 14 and the second opening-closing valve core 15; when the columnar bulge props up the inner hole through the first opening and closing valve core 14, the cable body passes through the second opening and closing valve core 15 to play a role in sealing; on the contrary, when the columnar bulge props up the inner hole through the second opening and closing valve core 15, the cable body passes through the first opening and closing valve core 14 to play a role in sealing; the first opening-closing valve core 14 and the second opening-closing valve core 15 ensure that at least one is sealed; thereby achieving the purpose of continuously, stably and quickly conveying the cable to the bottom of the hole.
A notch is processed on the slip 43, the outer wall of the slip 43 is of a conical structure, and the inner wall of the conveying body 41 where the slip 43 is located is a conical inner wall matched with the outer wall of the slip 43; under the action of the second locking nut 44 axially compressing the slips 43 and the tapered inner wall of the conveying body 41, the notch gap of the slips 43 becomes smaller, and further, the inner hole of the slips 43 becomes smaller to squeeze the cable 6, so that the cable 6 is fixed on the conveying device 4 by friction.
The hanging device 5 in this embodiment is of a conventional structure, and specifically, the hanging device 5 includes a hanging body, a claw is arranged in the hanging body, the claw is composed of two wing claws, the two wing claws are oppositely arranged and can be ejected and retracted outwards from the hanging body, so that when the claw is put into the drill rod, the claw is in a retracted closed state, and when the drill bit is ejected, the claw is in an ejected open state to ensure that the hole-protecting pipe does not slip out of the drill hole, an elastic clamping chamber and a side wall for accommodating the claw are arranged in the hanging body, a sliding groove is arranged at the rear part of the side wall, the front ends of the two wing claws are pivotally connected to the two side walls, the middle rear part is pivotally connected to the sliding groove through a connecting rod, and a torsion spring for providing rotational power is arranged, after the drill bit is ejected, the clamping jaws are opened and embedded into the hole wall so as to be fixed at a reserved position, and the hanging device is hung on the hole wall to play a role in fixing during drill lifting through the fixing effect of the hanging device.
The cable of the present embodiment is provided with a detection electrode 10 for effectively exploring geological conditions.
Example 2:
the embodiment also provides a method for continuously conveying the non-isometric detection cable of the directional long borehole in the underground coal mine, which is realized by adopting the system of the embodiment 1 and specifically comprises the following steps:
the first step is as follows: after the directional long drilling is constructed, carrying out long-time punching and then pulling out all drilling tools in the hole;
the second step: installing a drill bit and a drill rod, and drilling down to a position 2-3 m away from the bottom of the hole;
the third step: the cable penetrates out of the wire feeder, a multi-stage suspension device and a conveyor are mounted at the front end of the cable, and a second locking nut is screwed;
the fourth step: the wire feeder is manually fed into an inner hole of the drill rod by the conveying unit, and then the wire feeder is firmly connected with the drill rod;
the fifth step: as shown in fig. 4, the pump is started to pump water, the conveyor moves towards the bottom of the hole under the action of water pressure, the pressure and the cable allowance on the roller are observed, and the cables are automatically and continuously conveyed towards the bottom of the hole;
and a sixth step: as shown in fig. 5, when the water pressure suddenly drops and the cable is confirmed to be conveyed to the bottom of the hole through the cable allowance on the roller, the cable outside the hole is cut off, the wire feeder is disassembled, and the drill rod and the drill bit in the hole are taken out; the hanging device is hung on the hole wall to play a role in fixing, and the cable, the conveyor and the hanging device are not lifted out along with the drill rod.
Claims (6)
1. A coal mine underground directional long borehole non-equal diameter detection cable continuous conveying system is characterized by comprising a conveying channel unit and a conveyed unit;
the conveying channel unit comprises a wire feeder (1), a drill rod (2) and a drill bit (3) which are coaxial and connected in sequence;
the wire feeder (1) comprises a cylindrical water feeding body (11), a water inlet hole (12) is formed in the side wall of the water feeding body (11), two ends of the water feeding body (11) are respectively connected with the drill rod (2) and the sealing body (13), and a first opening and closing valve core (14) which is tightly attached to the inner wall of the water feeding body (11) and is through in the center is arranged in the water feeding body (11); the end part of the first opening and closing valve core (14) is tightly attached to the end part of the sealing body (13), a second opening and closing valve core (15) which is tightly attached to the inner wall of the sealing body (13) and is penetrated through in the center is arranged in the sealing body (13), and a first locking nut (16) is arranged at the end parts of the second opening and closing valve core (15) and the sealing body (13); the first locking nut (16), the second opening and closing valve core (15), the sealing body (13), the first opening and closing valve core (14) and the water conveying body (11) are coaxial and form a cable channel which is communicated along a central axis, and a cable (6) can penetrate through and is tightly attached to the first opening and closing valve core (14) and the second opening and closing valve core (15) to seal the end part of the water conveying body;
the conveyed unit comprises a conveyor (4) which can move in the drill rod (2) and is arranged in sequence along the direction from the drill rod (2) to the drill bit (3), and a suspension device (5) which is used for connecting the end part of the cable (6) and can be suspended on the wall of the drilling hole to fix the cable (6);
the conveyor (4) comprises a conveying body (41) with a through center, an annular sealing element (42) which is sleeved on the outer wall of the conveying body (41) and can be tightly attached to the inner wall of the drill rod (2), a slip (43) which is arranged in the conveying body (41) and a second locking nut (44) which is fixed on the slip (43) and the end part of the conveying body (41); the conveying body (41), the slips (43) and the second locking nut (44) are coaxial and penetrate through along the central axis so as to enable the cable (6) to penetrate through, and the slips (43) are used for clamping and fixing the cable (6);
and a cavity between the first opening and closing valve core (14) and the annular sealing element (42) is a sealed cavity, so that water enters the sealed cavity from the water inlet hole (12) and then pushes the conveyor (4) to drive the cable (6) to move forward.
2. The coal mine underground directional long borehole non-equal diameter detection cable continuous conveying system according to claim 1, characterized in that a conical limiting table coaxial with the water conveying body (11) is arranged on the inner wall of the water conveying body (11), a reducing opening of the conical limiting table of the water conveying body (11) faces the drill bit (3), and the outer wall of the first opening and closing valve core (14) is of a conical structure and is tightly fitted in the conical limiting table of the water conveying body (11) to realize axial positioning;
the inner wall of the sealing body (13) is provided with a conical limiting table coaxial with the sealing body (13), the necking of the conical limiting table of the sealing body (13) faces the drill bit (3), and the outer wall of the second opening and closing valve core (15) is of a conical structure and is assembled in a tightly-fitted mode in the conical limiting table of the sealing body (13) to achieve axial positioning.
3. The coal mine underground directional long borehole non-equal diameter detection cable continuous conveying system according to claim 1, characterized in that the inner diameters of the first opening and closing valve core (14) and the second opening and closing valve core (15) are not larger than the diameter of the cable (6), so that the cable (6) is sealed with the first opening and closing valve core (14) and the second opening and closing valve core (15) in the advancing process of the cable (6).
4. The coal mine underground directional long borehole non-constant diameter detection cable continuous conveying system according to claim 3, characterized in that two columnar bulges are arranged on the cable (6), and the diameter of each columnar bulge is larger than that of the cable (6); the first opening-closing valve core (14) and the second opening-closing valve core (15) can expand; the columnar bulge can expand the first opening and closing valve core (14) and the second opening and closing valve core (15) when passing through the first opening and closing valve core (14) and the second opening and closing valve core (15), and the inner holes of the first opening and closing valve core (14) and the second opening and closing valve core (15) are reduced to the original size after passing through the first opening and closing valve core (14) and the second opening and closing valve core (15) so as to seal the cable (6);
the distance between the two columnar bulges is smaller than the distance between the first opening-closing valve core (14) and the second opening-closing valve core (15); when the columnar bulge props up the inner hole through the first opening and closing valve core (14), the cable body passes through the second opening and closing valve core (15) to play a role in sealing; on the contrary, when the inner hole of the columnar bulge is opened through the second opening-closing valve core (15), the cable body passes through the first opening-closing valve core (14) to play a role in sealing; at least one of the first opening and closing valve core (14) and the second opening and closing valve core (15) is ensured to be sealed.
5. The continuous conveying system for the non-isometric detection cable of the directional long borehole in the coal mine well according to claim 1, characterized in that a notch is processed on the slip (43), the outer wall of the slip (43) is of a conical structure, and the inner wall of the conveying body (41) where the slip (43) is located is a conical inner wall matched with the outer wall of the slip (43); under the action of the second locking nut (44) axially compressing the slips (43) and the conical inner wall of the conveying body (41), the notch gap of the slips (43) is reduced, and then the inner hole of the slips (43) is reduced to extrude the cable (6) to generate friction so that the cable (6) is fixed on the conveyor (4).
6. A method for continuously conveying a non-isometric detection cable of an underground directional long borehole of a coal mine is realized by adopting the system of any one of claims 1 to 5, and specifically comprises the following steps:
the first step is as follows: after the directional long drilling is constructed, carrying out long-time punching and then extracting all drilling tools in the hole;
the second step is that: installing a drill bit and a drill rod, and drilling down to a position 2-3 m away from the bottom of the hole;
the third step: the cable penetrates out of the wire feeder, a multi-stage suspension device and a conveyor are mounted at the front end of the cable, and a second locking nut is screwed;
the fourth step: the wire feeder is manually fed into an inner hole of the drill rod by the conveying unit, and then the wire feeder is firmly connected with the drill rod;
the fifth step: the pump is started to pump water, the conveyor moves towards the bottom of the hole under the action of water pressure, the pressure and the cable allowance on the roller are observed, and cables are automatically and continuously conveyed towards the bottom of the hole;
and a sixth step: when the water pressure suddenly drops and the cable is confirmed to be conveyed to the bottom of the hole through the cable allowance on the roller, cutting off the cable outside the hole, detaching the wire feeder, and pulling out a drill rod and a drill bit in the hole; the hanging device is hung on the hole wall to play a role in fixing, and the cable, the conveyor and the hanging device are not lifted out along with the drill rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910893028.5A CN110593853B (en) | 2019-09-20 | 2019-09-20 | System and method for continuously conveying non-isodiametric detection cables of directional long drill holes in underground coal mine |
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|---|---|---|---|
| CN201910893028.5A CN110593853B (en) | 2019-09-20 | 2019-09-20 | System and method for continuously conveying non-isodiametric detection cables of directional long drill holes in underground coal mine |
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|---|---|---|---|---|
| CN111764872B (en) * | 2020-07-07 | 2023-04-07 | 中煤科工集团西安研究院有限公司 | Coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction drilling tool and construction method |
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