CN110700878A - Pumping screw pump drilling tool system for accumulated water in underground drilling hole of coal mine and construction method thereof - Google Patents
Pumping screw pump drilling tool system for accumulated water in underground drilling hole of coal mine and construction method thereof Download PDFInfo
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- CN110700878A CN110700878A CN201911018012.6A CN201911018012A CN110700878A CN 110700878 A CN110700878 A CN 110700878A CN 201911018012 A CN201911018012 A CN 201911018012A CN 110700878 A CN110700878 A CN 110700878A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000005553 drilling Methods 0.000 title claims abstract description 63
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000005086 pumping Methods 0.000 title claims abstract description 30
- 238000010276 construction Methods 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims description 40
- 238000007789 sealing Methods 0.000 claims description 26
- 238000009825 accumulation Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 8
- 210000002445 nipple Anatomy 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 239000003818 cinder Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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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
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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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
- E21F16/00—Drainage
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
A pumping screw pump drilling tool system for accumulated water in a coal mine underground drilling hole and a construction method thereof are disclosed, wherein the drilling tool system consists of a driving drill rod, a plurality of double-wall single-action drill rods, a conversion joint, a screw pump, a filter short section and a drill bit, one end of the driving drill rod is connected with one ends of the double-wall single-action drill rods, the double-wall single-action drill rods are sequentially connected, the other ends of the double-wall single-action drill rods are connected with one end of the conversion joint, the other end of the conversion joint is connected with one end of the screw pump, the other end of the screw pump is connected with one end of the filter short section, and the other end; therefore, the invention can pump and discharge accumulated water in the directional drilling hole and the conventional downward inclined drilling hole, has small disturbance to the hole wall, long service life of the drilling tool and stable performance, and can ensure the smooth extraction of gas in the drilling hole.
Description
Technical Field
The invention relates to the technical field of drilling machines, in particular to a pumping screw pump drilling tool system for accumulated water in a coal mine underground drilling hole and a construction method thereof.
Background
Gas is an important disaster-causing hidden danger in the coal mining process, and currently, drilling is generally adopted for pre-extraction before mining, and tunneling and stoping work can be carried out only after safety standards are met. Due to the trend of coal seams, the underground drill hole of the coal mine is designed into an underground inclined drill hole or a directional drill hole with a concave track of a partial hole section, and after the drilling construction is completed, water is accumulated in the partial hole section, so that the gas extraction effect and the standard extraction time of the drill hole are seriously affected, and therefore, the water accumulation in the underground drill hole of the coal mine is a problem which needs to be solved urgently.
At present, the underground inclined drilling hole drainage of a coal mine mostly adopts a compressed air drainage technology, underground compressed air is used as power, the compressed air enters a drill hole through a high-pressure resistant rubber pipe to increase the air pressure in the drill hole, momentum and energy exchange is carried out between the compressed air and a grain mixture in the drill hole to improve the kinetic energy of water and coal cinder, the pressure and the air quantity of the compressed air are determined according to the water accumulation quantity in a downward drill hole until the air pressure in the drill hole is greater than the atmospheric pressure outside the drill hole, the accumulated water and the coal cinder in the drill hole are pressed into a drainage pipe under the power action of the compressed air, and the water and the coal cinder are discharged outside the. The drainage technology needs to put a slender drain pipe into a hole, is mainly used for conventional downward inclined drilling, is difficult to put the drain pipe into a hole bottom water accumulation section for directional long drilling, can not realize deep hole drainage due to the limitation of underground wind pressure and wind volume, and can cause disturbance to a hole wall by compressed air drainage for a soft coal seam, so that the hole wall collapses and the gas extraction effect is influenced.
The principle of an oil well pump is adopted by some researchers, a screw pump is put into the bottom of a hole, the screw pump is driven by a driving device to pump water, but the gas extraction drilling hole is different from the well completion mode of an oil well, the oil well is completed by a steel sleeve, a shell of the screw pump is fixed on the inner wall of the steel sleeve through a special anchoring device, then the driving device drives a rotor of the screw pump to pump oil, the gas extraction drilling hole is mostly completed by an open hole, the drilling hole is prone to 'belly' and collapse, the hole wall of a coal seam is soft, and the shell of the screw pump is difficult to be fixed on the hole wall.
Therefore, in view of the defects, through careful research and design, the designer of the invention researches and designs a pumping screw pump drilling tool system for accumulated water in a coal mine underground drilling hole and a construction method thereof by integrating the experience and the result of the related industries for many years, so as to overcome the defects.
Disclosure of Invention
The invention aims to provide a pumping screw pump drilling tool system for accumulated water in a coal mine underground drill hole and a construction method thereof, which can pump and discharge the accumulated water in a directional drill hole, can pump and discharge the accumulated water in a conventional underground inclined drill hole, has small disturbance on the hole wall, has long service life and stable performance, and can ensure the smooth extraction of gas in the drill hole.
In order to achieve the purpose, the invention discloses a pumping screw pump drilling tool system for accumulated water in a borehole in a coal mine, which consists of a driving drill rod, a plurality of double-wall single-action drill rods, an adapter, a screw pump, a filter nipple and a drill bit, and is characterized in that:
one end of the driving drill rod is connected with one ends of the double-wall single-action drill rods, the double-wall single-action drill rods are sequentially connected, the other ends of the double-wall single-action drill rods are connected with one end of the adapter, the other end of the adapter is connected with one end of the screw pump, the other end of the screw pump is connected with one end of the filtering short section, and the other end of the filtering short section is connected with one end of the drill bit.
Wherein: the active drill rod consists of a drill rod pipe body, a first universal shaft, a drill rod joint, a first female plug joint, a first sealing sleeve, a drainage joint and a first core pipe, the drill pipe body, the first universal shaft, the first core pipe, the first female plug connector and the first seal sleeve are sequentially connected to form a rotatable part, the front end of the drill pipe body is connected to one end of a first universal shaft, the other end of the first universal shaft is connected to the rear end of a first core pipe so as to realize rotation of power, the first core pipe, a first female plug connector and a first sealing sleeve are arranged in the drill pipe connector, the water drainage joint is vertically arranged on the outer wall of the drill rod joint and penetrates through the drill rod joint, the outer wall of the first core pipe is provided with a plurality of first penetrating water through holes, a first rolling bearing and a second rolling bearing are arranged between the rotatable part of the driving drill rod and the drill rod joint so as to realize relative rotation.
Wherein: the front end of the outer bearing ring of the first rolling bearing is abutted against an inner wall boss of the drill rod joint, the rear end of the inner bearing ring is abutted against an outer wall boss of the first core pipe, the rear end of the outer bearing ring of the second rolling bearing is abutted against another inner wall boss of the drill rod joint, and the two ends of the inner bearing ring are respectively abutted against the front end wall of the first core pipe and an outer wall boss of the first female plug-in joint to realize axial limitation.
Wherein: the double-wall single-action drill rod is composed of a first outer pipe, a first male plug connector, a second core pipe, a second seal sleeve, a second female plug connector and a second seal ring, the first male plug connector, the second core pipe, the second seal sleeve and the second female plug connector are sequentially connected to form a rotatable part, and a third rolling bearing and a fourth rolling bearing are arranged between the first outer pipe and the rotatable part of the double-wall single-action drill rod to fix the first outer pipe and rotate the rotatable part.
Wherein: the front end of the outer bearing ring of the third rolling bearing is abutted against the inner wall boss of the first outer pipe, the rear end of the inner bearing ring is abutted against the outer wall boss of the first male plug-in connector, the rear end of the outer bearing ring of the fourth rolling bearing is abutted against the other inner wall boss of the first outer pipe, and the front end of the inner bearing ring is abutted against the outer wall boss of the second female plug-in connector to realize axial limitation.
Wherein: the conversion joint comprises a second outer pipe, a second male plug connector, a third core pipe and a third sealing ring, the second outer pipe is an external fixed part, the second male plug connector is connected with the third core pipe to form a rotatable part, a fifth bearing is arranged between the second outer pipe and the rotatable part, the front end of the core pipe is closed, a plurality of second water through holes are distributed in the pipe wall of the core pipe, and the front end of the third core pipe is provided with a connecting column.
Wherein: the front end of the outer bearing ring of the fifth bearing is abutted against the inner wall boss of the second outer pipe, and the rear end of the inner bearing ring is abutted against the outer wall boss of the second male plug connector to realize axial limiting.
Wherein: the screw pump is composed of a second universal shaft, a third outer pipe, a rubber stator and a rotor, wherein the front end of the second universal shaft is fixed to the rear end of the rotor, the rubber stator is fixed to the inner wall of the third outer pipe, the rotor is arranged in the rubber stator to form a screw pair, and the rotation direction of the rubber stator and the rotor is left-handed.
Wherein: the filter nipple is composed of an outer pipe with holes, a filter core pipe, a support ring and a check ring for holes, and two ends of the filter core pipe are fixed with the outer pipe with holes through the support ring and the check ring for holes respectively.
The construction method of the pumping screw pump drilling tool system for accumulated water in the underground drilling hole of the coal mine is also disclosed, and is characterized by comprising the following steps of:
sequentially connecting a lower drill bit, a filter short section, a screw pump, a crossover sub and a plurality of double-wall single-action drill rods to the known depth of a water accumulation hole section;
secondly, connecting an active drill rod additionally to ensure that the filter short section is completely immersed in the water accumulation section in the hole;
step three: the drill rod joint of the driving drill rod is clamped by the drill clamp, the drill gyrator tightly holds the drill rod pipe body of the driving drill rod, the gyrator rotates anticlockwise, the torque is transmitted to the rotor of the screw pump, and water pumping and discharging are carried out;
step four: when no water is discharged, the driving drill rod is detached, the double-wall single-action drill rod is additionally connected or withdrawn to the depth of the next known water accumulation hole section, and the step three is repeated;
step five: and when the drainage work of all the water accumulation hole sections is finished, all the water pumping tools are withdrawn.
According to the above content, the pumping screw pump drilling tool system for accumulating water in the underground coal mine drilling hole and the construction method thereof have the following effects:
1. accumulated water in any hole section of the directional drilling hole can be pumped and drained by adjusting the number of the drill rods which are put into the directional drilling hole, and the accumulated water in the conventional downward inclined drilling hole can also be pumped and drained;
2. all the internal pipe body threaded connections adopt reverse-thread threads, the screw pump also adopts a left-handed screw form, when water is pumped, the power head rotates anticlockwise, the screw pump is driven to pump water through the inner pipe assembly, the external pipe assembly threaded connection is tighter and tighter, the screw pump cannot be loosened, and the whole system works stably;
3. the system has the advantages that the inner pipe assembly and the outer pipe assembly are connected through the specially arranged and limited rolling bearings and are sealed through the specially arranged sealing sleeves and sealing rings, the whole structure is smooth to operate, the requirement on the torque of a power head of a drilling machine is low, the stress condition of a drilling tool is good, the friction loss of the inner pipe body and the outer pipe body is avoided, and the service life of the system can be effectively prolonged;
4. the anchoring device is not arranged, compressed air is not used for scouring the hole wall, and the disturbance to the hole wall of the drilled hole is small.
The details of the present invention can be obtained from the following description and the attached drawings.
Drawings
FIG. 1 shows a schematic structural diagram of a pumping screw pump drilling tool system for accumulated water in a borehole of a coal mine.
FIG. 1A shows a schematic of the present invention's active drill pipe in connection with a double-walled single action drill pipe.
FIG. 1B shows a schematic view of the double-walled single-action drill pipe interconnection of the present invention.
FIG. 1C shows a schematic view of a double-walled single-action drill pipe of the present invention connected to an adapter.
FIG. 1D shows a schematic representation of the adapter of the present invention in connection with a screw pump.
Fig. 2 shows a schematic of the construction of the kelly of the present invention.
Fig. 3 shows a schematic of the construction of the double-walled single-action drill pipe of the present invention.
Fig. 4 shows a schematic view of the construction of the adapter of the present invention.
Fig. 5 shows a schematic view of the screw pump of the present invention.
Fig. 6 shows a schematic of the construction of the filter rod of the present invention.
Reference numerals:
1. driving a drill rod; 2. a double-walled single-action drill pipe; 3. a crossover sub; 4. a screw pump; 5. filtering the short section; 6. a drill bit; 101. a drill pipe body; 102. a first universal shaft; 103. a drill pipe joint; 104. a first female plug; 105. a first seal cartridge; 106. a first rolling bearing; 107. a water discharge joint; 108. a second rolling bearing; 109. a first core tube; 201. a first outer tube; 202. a third rolling bearing; 203. a first male plug; 204. a second core tube; 205. a fourth rolling bearing; 206. a second seal cartridge; 207. a second female plug; 208. a second seal ring; 301. a second outer tube; 302. a fifth rolling bearing; 303. a second male plug; 304. a third core tube; 305. a third seal ring; 401. a second cardan shaft; 402. a third outer tube; 403. a rubber stator; 404. a rotor; 501. an outer tube with holes; 502. a filter element pipe; 503 supporting the ring; 504 holes are used for retaining rings.
Detailed Description
Referring to fig. 1, a pumping screw pump drilling tool system for accumulating water in a borehole of a coal mine is shown.
The pumping screw pump drilling tool system for accumulated water in the underground drilling hole of the coal mine mainly comprises a driving drill rod 1, a plurality of double-wall single-action drill rods 2, a conversion joint 3, a screw pump 4, a filtering short section 5 and a drill bit 6, and simultaneously refers to fig. 1A, fig. 1B, fig. 1C and fig. 1D, one end of the driving drill rod 1 is connected with one ends of the double-wall single-action drill rods 2, the number of the double-wall single-action drill rods 2 can be selected according to the depth of a required drainage hole section and is sequentially connected, the other ends of the double-wall single-action drill rods 2 are connected with one end of the conversion joint 3, the other end of the conversion joint 3 is connected with one end of the screw pump 4, the other end of the screw pump 4 is connected with one end of the filtering short section 5, and the.
Referring to fig. 2, the active drill rod 1 is composed of a drill rod pipe body 101, a first universal shaft 102, a drill rod joint 103, a first female plug 104, a first sealing sleeve 105, a first rolling bearing 106, a drainage joint 107, a second rolling bearing 108 and a first core pipe 109, wherein an inner pipe assembly formed by sequentially connecting the drill rod pipe body 101, the first universal shaft 102, a first core pipe 109, the first female plug 104 and the first sealing sleeve 105 is a rotatable part, an outer pipe assembly formed by the drill rod joint 103 and the drainage joint 107 is a non-rotatable part, a front end of the drill rod pipe body 101 is connected to one end of the first universal shaft 102, the other end of the first universal shaft 102 is connected to a rear end of the first core pipe 109, so that after the drill rod pipe 101 is connected to a power head of a drilling machine, power can be rotated in an adjustable direction by the first universal shaft 102, the front end of the first core pipe 109 can be fixed to the rear end of the first female plug 104 by a fixing manner such as a threaded connection, the front end of the first female plug 104 can be connected to the rear end of the first sealing sleeve 105 through a fixing manner such as threaded connection, the first core tube 109, the first female plug 104 and the first sealing sleeve 105 are arranged in the drill rod joint 103, the drainage joint 107 is vertically arranged on the outer wall of the drill rod joint 103 and penetrates through the drill rod joint, the outer wall of the first core tube 109 is provided with a plurality of first through water holes for discharging the liquid inside through the first through water holes and the drainage joint 107, a first rolling bearing 106 and a second rolling bearing 108 are arranged between the rotatable part of the active drill rod and the drill rod joint for realizing rotation, the front end of an outer bearing ring of the first rolling bearing 106 abuts against an inner wall boss of the drill rod joint 103, the rear end of the inner bearing ring abuts against an outer wall boss of the first core tube 109, and the rear end of an outer bearing ring of the second rolling bearing 108 abuts against another inner wall boss of the drill rod joint 103, two ends of the inner bearing ring are respectively abutted between the front end wall of the first core pipe 109 and an outer wall boss of the first female plug-in connector 104, so that axial limiting is realized.
Referring to fig. 3, the double-walled single-acting drill rod 2 is composed of a first outer pipe 201, a third rolling bearing 202, a first male plug 203, a second core pipe 204, a fourth rolling bearing 205, a second seal sleeve 206, a second female plug 207 and a second seal ring 208, wherein a rotatable part is composed of the first male plug 203, the second core pipe 204, the second seal sleeve 206 and the second female plug 207, the first male plug 203, the second female plug 207 and the second core pipe 204 can be sequentially connected through reverse threads, the third rolling bearing 202 and the fourth rolling bearing 205 are arranged between the first outer pipe 201 and the rotatable part to realize the fixation of the first outer pipe 201 and the rotation of the rotatable part, wherein the front end of an outer bearing ring of the third rolling bearing 202 abuts against a boss on the inner wall of the first outer pipe 201, the rear end of an inner bearing ring abuts against a boss on the outer wall of the first male plug 203, the rear end of the outer bearing ring of the fourth rolling bearing 205 abuts against another inner wall boss of the first outer pipe 201, the front end of the inner bearing ring abuts against an outer wall boss of the second female plug-in connector 205, so that axial limiting is achieved, the rear end of the first outer pipe 201 is fixedly accommodated at the front end of the drill rod connector 103, the first male plug-in connector 203 and the first female plug-in connector 104 are fixedly connected in an inserted mode, the first male plug-in connector 203 is accommodated in the first sealing sleeve 105, and a plurality of sealing rings are arranged between the first male plug-in connector 203 and the first sealing sleeve 105, so that power transmission and sealing functions are achieved.
Referring to fig. 4, the adapter 3 is composed of a second outer tube 301, a fifth rolling bearing 302, a second male plug 303, a third core tube 304 and a third seal ring 305, the second outer tube 301 is an external fixed portion, the second male plug 303 and the third core tube 304 are connected by reverse threads to form a rotatable portion, a fifth bearing 302 is arranged between the second outer tube 301 and the rotatable portion, the front end of the third core tube 304 is closed, a plurality of second water passing holes with diameters of 6-10mm are distributed on the tube wall, the front end of an outer bearing ring of the fifth bearing 305 abuts against an inner wall boss of the second outer tube 301, the rear end of the inner bearing ring abuts against an outer wall boss of the second male plug 303, so that axial position limitation is achieved, the rear end of the second outer tube 301 accommodates and fixes the front end of the first outer tube 201, the second male plug 303 and the second female plug 207 are fixedly inserted into each other, and the second male plug 203 is accommodated in the second sealing sleeve 105 and a plurality of sealing rings are arranged between the second male plug and the second sealing sleeve to realize power transmission and sealing functions.
The third rolling bearing 202, the fourth rolling bearing 205 and the fifth rolling bearing 305 may be of a bearing set structure, and may include two ball bearings arranged side by side.
Wherein, the front end of the third core pipe 304 is provided with a connecting column.
Referring to fig. 5, the screw pump 4 is composed of a second universal shaft 401, a third outer tube 402, a rubber stator 403 and a rotor 404, the rear end of the third outer tube 402 accommodates and fixes the front end of the second outer tube 301, the rear end of the second universal shaft 401 is provided with a connecting cylinder, the connecting cylinder can be fixed to a connecting column through threads or shape matching, the front end of the second universal shaft 401 is fixed to the rear end of the rotor 404, the rubber stator 403 is fixed to the inner wall of the third outer tube 402, the rotor 404 is arranged in the rubber stator 403 to form a screw pair, the number of the rubber stator 403 and the rotor 404 can be single-headed or multi-headed, the rotation directions of the rubber stator 403 and the rotor 404 are preferably left-handed, and the rear end of the third outer tube 402 accommodates and fixes the front end of the second outer tube 301.
Referring to fig. 6, the filter nipple 5 is composed of an outer pipe 501 with holes, a filter core pipe 502, a support ring 503 and a retainer ring 504 for holes, two ends of the filter core pipe 502 are respectively fixed with the outer pipe 501 with holes through the support ring 503 and the retainer ring 504 for holes 2, and the diameter of the filter core pipe is determined according to the solid particle size allowed to pass through by the screw pump.
In summary, the pumping screw pump drilling tool system is divided into two parts, namely a system outer pipe assembly and a system inner pipe assembly, wherein the system outer pipe assembly is formed by connecting a drill rod joint of a driving drill rod 1, a first outer pipe of a double-wall single-action drill rod 2, a second outer pipe of a conversion joint 3, a third outer pipe of a screw pump 4, a filter short section 5 and a drill bit 6 sequentially through positive threads, the system inner pipe assembly is formed by connecting the driving drill rod 1, the double-wall single-action drill rod 2 inner pipe assembly, a rotatable part of the conversion joint 3, a second universal shaft and a rotor in the screw pump 4 sequentially through splicing or reverse threads, the splicing structure is provided with two sealing rings for sealing, the two parts of the system outer pipe assembly and the system inner pipe assembly can rotate relatively, and a plurality of groups of rolling bearings are arranged.
In addition, the sealing assembly is specially arranged among the connecting structures, and the relative rotation is particularly limited through the special arrangement and the limiting of the bearings, so that the mutual rotation and sealing are optimized, and a better effect is realized.
Therefore, the pumping and draining of accumulated water in the underground coal mine drilling hole can be realized through the pumping and pumping screw pump drilling tool system for accumulated water in the underground coal mine drilling hole with the structure, and the specific construction method mainly comprises the following steps:
sequentially connecting a lower drill bit 6, a filter short section 5, a screw pump 4, an adapter 3 and a plurality of double-wall single-action drill rods 2 to a known depth of a water accumulation hole section;
secondly, the driving drill rod 1 is additionally connected, so that the filtering short section 5 is completely immersed in the water accumulation section in the hole;
step three: the drilling machine holder clamps a drill rod joint 103 of the initiative drill rod 1 to fix the system outer pipe assembly, namely, a screw pump stator is fixed, then a drilling machine gyrator tightly holds a drill rod pipe body 101 of the initiative drill rod 1, the gyrator rotates anticlockwise, torque is transmitted to a rotor of a screw pump 3 through the system inner pipe assembly to drive a screw motor to pump water, after a plurality of times, water is pumped from a filter short section 5 through the screw pump 4 and enters an annular space between a third core pipe 304 and a second outer pipe 301 of the conversion joint 3, then enters a second core pipe 204 of the double-wall single-action drill rod 2 through a second water through hole on the pipe wall of the third core pipe 304, flows into the annular space between the first core pipe 109 and the drill rod joint 103 from the first water through hole of the first core pipe 109 after flowing through the first core pipe 109 of the initiative drill rod 1, and is finally;
step four: when the drainage joint 107 has no water, the accumulated water in the hole section is drained, the driving drill rod 1 is detached, a plurality of double-wall single-action drill rods 2 are additionally connected or withdrawn to the depth of the next known accumulated water hole section, and the third step is repeated;
step five: and when the drainage work of all the water accumulation hole sections is finished, all the water pumping tools are withdrawn.
Therefore, the invention has the advantages that:
1. accumulated water in any hole section of the directional drilling hole can be pumped and drained by adjusting the number of the drill rods which are put into the directional drilling hole, and the accumulated water in the conventional downward inclined drilling hole can also be pumped and drained;
2. all the internal pipe body threaded connections adopt reverse-thread threads, the screw pump also adopts a left-handed screw form, when water is pumped, the power head rotates anticlockwise, the screw pump is driven to pump water through the inner pipe assembly, the external pipe assembly threaded connection is tighter and tighter, the screw pump cannot be loosened, and the whole system works stably;
3. the system has the advantages that the inner pipe assembly and the outer pipe assembly are connected through the specially arranged and limited rolling bearings and are sealed through the specially arranged sealing sleeves and sealing rings, the whole structure is smooth to operate, the requirement on the torque of a power head of a drilling machine is low, the stress condition of a drilling tool is good, the friction loss of the inner pipe body and the outer pipe body is avoided, and the service life of the system can be effectively prolonged;
4. the anchoring device is not arranged, compressed air is not used for scouring the hole wall, and the disturbance to the hole wall of the drilled hole is small.
It should be apparent that the foregoing description and illustrations are by way of example only and are not intended to limit the present disclosure, application or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention will include any embodiments falling within the foregoing description and the appended claims.
Claims (10)
1. The utility model provides a colliery is downthehole ponding pump screw pump drilling tool system of driling in pit, comprises initiative drilling rod, a plurality of double-walled single-action drilling rod, crossover sub, screw pump, filters nipple joint, drill bit, its characterized in that:
one end of the driving drill rod is connected with one ends of the double-wall single-action drill rods, the double-wall single-action drill rods are sequentially connected, the other ends of the double-wall single-action drill rods are connected with one end of the adapter, the other end of the adapter is connected with one end of the screw pump, the other end of the screw pump is connected with one end of the filtering short section, and the other end of the filtering short section is connected with one end of the drill bit.
2. The pump drilling system for pumping accumulated water in a coal mine underground borehole according to claim 1, wherein: the active drill rod consists of a drill rod pipe body, a first universal shaft, a drill rod joint, a first female plug joint, a first sealing sleeve, a drainage joint and a first core pipe, the drill pipe body, the first universal shaft, the first core pipe, the first female plug connector and the first seal sleeve are sequentially connected to form a rotatable part, the front end of the drill pipe body is connected to one end of a first universal shaft, the other end of the first universal shaft is connected to the rear end of a first core pipe so as to realize rotation of power, the first core pipe, a first female plug connector and a first sealing sleeve are arranged in the drill pipe connector, the water drainage joint is vertically arranged on the outer wall of the drill rod joint and penetrates through the drill rod joint, the outer wall of the first core pipe is provided with a plurality of first penetrating water through holes, a first rolling bearing and a second rolling bearing are arranged between the rotatable part of the driving drill rod and the drill rod joint so as to realize relative rotation.
3. The pump drilling system for pumping accumulated water in a coal mine underground borehole according to claim 2, wherein: the front end of the outer bearing ring of the first rolling bearing is abutted against an inner wall boss of the drill rod joint, the rear end of the inner bearing ring is abutted against an outer wall boss of the first core pipe, the rear end of the outer bearing ring of the second rolling bearing is abutted against another inner wall boss of the drill rod joint, and the two ends of the inner bearing ring are respectively abutted against the front end wall of the first core pipe and an outer wall boss of the first female plug-in joint to realize axial limitation.
4. The pump drilling system for pumping accumulated water in a coal mine underground borehole according to claim 1, wherein: the double-wall single-action drill rod is composed of a first outer pipe, a first male plug connector, a second core pipe, a second seal sleeve, a second female plug connector and a second seal ring, the first male plug connector, the second core pipe, the second seal sleeve and the second female plug connector are sequentially connected to form a rotatable part, and a third rolling bearing and a fourth rolling bearing are arranged between the first outer pipe and the rotatable part of the double-wall single-action drill rod to fix the first outer pipe and rotate the rotatable part.
5. The pump drilling system for pumping accumulated water in a coal mine underground borehole according to claim 4, wherein: the front end of the outer bearing ring of the third rolling bearing is abutted against the inner wall boss of the first outer pipe, the rear end of the inner bearing ring is abutted against the outer wall boss of the first male plug-in connector, the rear end of the outer bearing ring of the fourth rolling bearing is abutted against the other inner wall boss of the first outer pipe, and the front end of the inner bearing ring is abutted against the outer wall boss of the second female plug-in connector to realize axial limitation.
6. The pump drilling system for pumping accumulated water in a coal mine underground borehole according to claim 1, wherein: the conversion joint comprises a second outer pipe, a second male plug connector, a third core pipe and a third sealing ring, the second outer pipe is an external fixed part, the second male plug connector is connected with the third core pipe to form a rotatable part, a fifth bearing is arranged between the second outer pipe and the rotatable part, the front end of the core pipe is closed, a plurality of second water through holes are distributed in the pipe wall of the core pipe, and the front end of the third core pipe is provided with a connecting column.
7. The pump drilling system for pumping accumulated water in a coal mine underground borehole according to claim 6, wherein: the front end of the outer bearing ring of the fifth bearing is abutted against the inner wall boss of the second outer pipe, and the rear end of the inner bearing ring is abutted against the outer wall boss of the second male plug connector to realize axial limiting.
8. The pump drilling system for pumping accumulated water in a coal mine underground borehole according to claim 1, wherein: the screw pump is composed of a second universal shaft, a third outer pipe, a rubber stator and a rotor, wherein the front end of the second universal shaft is fixed to the rear end of the rotor, the rubber stator is fixed to the inner wall of the third outer pipe, the rotor is arranged in the rubber stator to form a screw pair, and the rotation direction of the rubber stator and the rotor is left-handed.
9. The pump drilling system for pumping accumulated water in a coal mine underground borehole according to claim 1, wherein: the filter nipple is composed of an outer pipe with holes, a filter core pipe, a support ring and a check ring for holes, and two ends of the filter core pipe are fixed with the outer pipe with holes through the support ring and the check ring for holes respectively.
10. The construction method of the pumping screw pump drilling tool system for accumulated water in the underground coal mine borehole according to any one of claims 1 to 10, characterized by comprising the steps of:
sequentially connecting a lower drill bit, a filter short section, a screw pump, a crossover sub and a plurality of double-wall single-action drill rods to the known depth of a water accumulation hole section;
secondly, connecting an active drill rod additionally to ensure that the filter short section is completely immersed in the water accumulation section in the hole;
step three: the drill rod joint of the driving drill rod is clamped by the drill clamp, the drill gyrator tightly holds the drill rod pipe body of the driving drill rod, the gyrator rotates anticlockwise, the torque is transmitted to the rotor of the screw pump, and water pumping and discharging are carried out;
step four: when no water is discharged, the driving drill rod is detached, the double-wall single-action drill rod is additionally connected or withdrawn to the depth of the next known water accumulation hole section, and the step three is repeated;
step five: and when the drainage work of all the water accumulation hole sections is finished, all the water pumping tools are withdrawn.
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| CN201911018012.6A CN110700878B (en) | 2019-10-24 | 2019-10-24 | Pumping screw pump drilling tool system for accumulated water in underground drilling hole of coal mine and construction method thereof |
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| CN201911018012.6A CN110700878B (en) | 2019-10-24 | 2019-10-24 | Pumping screw pump drilling tool system for accumulated water in underground drilling hole of coal mine and construction method thereof |
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| CN110700878B (en) | 2020-10-27 |
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