CN113153156B - Hydraulic combined mechanical hole repairing device and method - Google Patents
Hydraulic combined mechanical hole repairing device and method Download PDFInfo
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- CN113153156B CN113153156B CN202110557026.6A CN202110557026A CN113153156B CN 113153156 B CN113153156 B CN 113153156B CN 202110557026 A CN202110557026 A CN 202110557026A CN 113153156 B CN113153156 B CN 113153156B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003245 coal Substances 0.000 claims abstract description 74
- 238000000605 extraction Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 230000036346 tooth eruption Effects 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 16
- 239000002893 slag Substances 0.000 claims description 14
- 238000005553 drilling Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000001788 irregular Effects 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims 1
- 230000008439 repair process Effects 0.000 description 11
- 239000007789 gas Substances 0.000 description 10
- 239000003818 cinder Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003786 synthesis reaction 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
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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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
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
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Abstract
The invention belongs to the technical field of coal bed gas extraction, and particularly discloses a hydraulic combined mechanical hole repairing device and a hydraulic combined mechanical hole repairing method.
Description
Technical Field
The invention belongs to the technical field of coal seam gas extraction, and particularly relates to a hydraulic combined mechanical hole repairing device and method.
Background
The high-efficiency extraction of the coal bed gas (gas) can not only promote the smooth implementation of the energy strategy in China, but also reduce the emission of greenhouse gas, and has a vital role in the ecological civilization construction in China. However, the occurrence conditions in China are complex, the coal seams are mostly soft and low-permeability coal seams, the phenomena of hole collapse and hole blocking often occur in the gas extraction process, and the phenomena are increasingly aggravated along with the continuous increase of the extraction depth, so that the gas extraction rate is low, and the implementation of the energy strategy and the ecological civilization construction in China are seriously restricted. The method ensures the smoothness of a gas flow channel, and improves the utilization rate of the drill hole, thereby being an effective method for improving the gas extraction rate. The method is a simple, convenient, easy, economical and efficient technical means for repairing collapsed holes and plugged holes and removing coal cinder in the drilled holes.
The conventional drilling hole repairing method is to drill holes again by using a drilling machine, the method is time-consuming and high in cost, actual parameters are greatly different from original drilling parameters, holes are easy to form, and the difficulty of gas extraction is increased. In recent years, domestic scholars adopt self-driving drill bits to repair holes, and the drilling machine is economical and efficient. In addition, the coal slag and the rock debris in the drill hole are sucked out by adopting negative pressure, and the method is only suitable for the coal slag with small particles and cannot discharge large-block coal slag, rock mass and coal slime caused by hole collapse. How to remove rock debris and coal slag in the drill hole and recover the extraction capability of the drill hole is an important premise for ensuring the efficient use of the drill hole and the efficient extraction of gas. In order to solve the problem, in recent years, domestic scholars adopt water jet self-driving drill bits to repair holes, for example, the application numbers of CN201410827235.8 and CN201420843765.7, the water pressure self-driving drill bit devices are used for deslagging, the drainage capability of drilled holes is recovered, the front parts of the self-driving drill bit devices are provided with a plurality of forward nozzles for breaking coal and removing slag, and the rear parts of the self-driving drill bit devices are provided with a plurality of nozzles to form jet flow to provide power. However, as the length of the extraction drill hole is increased, the self weight of the pipeline is increased, so that the resistance is increased, the self-driving drill bit cannot provide enough power to reach the deep part of the drill hole, and the long drill hole cannot be repaired; reducing the resistance is an effective way for the self-driving drill bit to repair long drilled holes, the water jet formed by the forward nozzle of the traditional self-driving drilling is a main component of the resistance, and the higher the pressure and the flow, the larger the resistance.
Disclosure of Invention
The invention aims to provide a hydraulic combined mechanical self-driving drill bit hole repairing device and method capable of repairing collapsed coal holes, and solves the problems that short drill hole resources are seriously wasted and long drill holes are difficult to repair in the collapse repairing process of coal holes in the existing gas extraction of low-permeability coal seams.
In order to achieve the purpose, the invention adopts the technical scheme that:
a hydraulic combined machine hole repairing device comprises a water tank and a high-pressure water pump connected with the water tank, wherein the water outlet end of the high-pressure water pump is connected with a high-pressure rubber pipe through a connecting joint, the high-pressure rubber pipe is wound on a pipe coiling device, the other end of the high-pressure rubber pipe is connected with a rotary drill bit through the connecting joint, the rotary drill bit comprises a rotary body and a three-wing drill bit with cutting teeth, the three-wing drill bit is positioned at the front end of the rotary body and is in threaded connection with the front end of the rotary body, the drill bit is provided with the three-wing cutting teeth and used for breaking coal during rotation, the coal breaking efficiency is improved, on one hand, the drill hole can be drilled through an extraction pipe for coal breaking repair, hole sealing facilities do not need to be damaged, and the integrity of the drill hole is guaranteed while the drill hole is repaired; on the other hand, the resistance is greatly reduced, and simultaneously, enough power can be provided for long-drill hole repair.
Furthermore, the rotator includes entry coupling nut, and the cylindrical casing that passes through threaded connection with entry coupling nut right-hand member, be equipped with the axle core in the casing, be equipped with a bearing between axle core both ends outside and the casing respectively, axle core and entry coupling nut contact one end still are equipped with rotary seal seat, still be equipped with the speed limit subassembly between axle core and the casing, the speed limit subassembly is used for reducing the rotation rate of rotator.
Furthermore, the speed limit subassembly sets up the position between axle core, casing and axle core both ends bearing, the speed limit subassembly is located the annular weight piece between sleeve and the axle core including the sleeve of axle core outer end, is equipped with the spring between the bearing of annular weight piece and axle core right-hand member.
Further, three wing drill bits of area cutting teeth include central drill bit, and the drill bit comprises the toper sector at both ends and the cylinder cambered surface that is located the centre, evenly be equipped with three pterygoid lamina along its circumferencial direction on the front end toper sector of drill bit, every pterygoid lamina front end all is equipped with two circular salient's cutting teeth, the drill bit center is equipped with a central nozzle, and the middle cylinder cambered surface of drill bit is equipped with three evenly distributed's reversal nozzle along its circumference, reversal nozzle's injection direction is the tangent line setting with central nozzle edge, and this design has reduced the quantity of forward nozzle to reduce the resistance of forward nozzle water jet, compared in current drill bit, can provide bigger driving force. Compared with water jet flow coal breaking, the tri-wing drill bit with the cutting teeth can efficiently break collapsed coal briquettes into smaller coal cinder to be discharged, so that drilling hole repairing is more thorough, jet flow formed by the middle nozzle is used for cooling, the reverse nozzle is arranged at the rear part of the tri-wing drill bit, the jet flow is formed to provide power and remove cinder, and the number of the forward nozzles is reduced, so that the resistance of the forward nozzle water jet flow is reduced, the resistance is greatly reduced, and the power is improved.
Furthermore, the included angle between the spraying direction of the reverse nozzle and the axis of the drill bit is not less than 10 degrees, and the specific numerical value can be calculated according to the thrust required to be provided; the angle between the reverse nozzle and the drill bit normal can be calculated from the torque required to restore the borehole. The angle of arranging of nozzle can design according to the drilling condition of difference, makes the device suitability increase, the pterygoid lamina is irregularly shaped's multilateral body, the top surface projection of pterygoid lamina has the polygon of point portion for the one end that rectangle and triangle-shaped constitute, and the orthographic projection that has cutting tooth one end of pterygoid lamina is right trapezoid, and the projection of pterygoid lamina side is the irregular polygon that upper portion trapezium and lower part rectangle constitute, and trapezoidally and the rectangle junction is equipped with step form breach, the cutting tooth sets up in the plane at breach department trapezoidal stringcourse place.
Furthermore, the drill bit is internally provided with a cavity which is respectively communicated with the central nozzle and the reverse nozzle, the inlet connecting nut and the rotary drill bit are internally provided with a spraying cavity, and the spraying cavity and the cavity are used for smoothly spraying water.
Furthermore, the number of the reverse nozzles is three, the three reverse nozzles are uniformly distributed along the plane where the drill bit is located, and the pipe coiling device is also provided with hand brakes.
Furthermore, an O-shaped sealing ring is arranged in the rotary sealing seat, a left lip seal is arranged on the left side of the bearing on the left side of the shaft core, and a right lip seal is arranged on the right side of the bearing on the right side of the shaft core.
Further, still be equipped with the overflow hole on the entry coupling nut, overflow hole end and left side lip closing plate UNICOM, the overflow hole outside is equipped with the closing plate, can prevent that the pollutant from getting into high-pressure seal seat and sealed in.
A method for repairing coal holes by water jet self-propelled rotation by utilizing a hydraulic combined mechanical hole repairing device comprises the following steps:
(1) Disassembling the joints of the extraction drill hole sealing pipes at the collapsed coal holes to be repaired;
(2) Placing a rotary drill bit into the extraction pipe, and opening a hand brake of a high-pressure rubber pipe coiler;
(3) Starting the high-pressure pump and adjusting the pressure to a required value;
(4) The rear nozzle of the rotary drill bit provides forward power and torque, so that the drill bit can clean coal slag in the extraction pipe and continuously move, the drill bit continuously breaks coal after the rotary drill bit moves into the drilled hole, and the water jet discharges the coal slag out of the coal hole to achieve the purpose of repairing the collapsed coal hole;
(5) After repairing one coal hole, operating the high-pressure rubber tube coiler to coil up the rubber tube and pulling out the rotary drill bit;
(6) And (5) under different hole repairing conditions, selecting different nozzle parameters to rotate the drill bit, and repeating the steps (1) - (5).
The setting angle of the reverse nozzle can influence the magnitude of the propelling force and the rotating torque, so that the proper installation angle has important significance for breaking coal and cleaning holes. Compared with water jet coal breaking, the three-wing drill bit with the cutting teeth can efficiently break collapsed coal blocks into smaller coal cinder to be discharged, so that drilling hole repairing is more thorough, the angles of three reverse nozzles are different, forward central nozzle jet flow is used for cooling, and the reverse nozzle jet flow provides propelling force and torque. Taking coal with 13Mpa uniaxial compressive strength and 5Mpa uniaxial shear strength as an example, theoretically, the pressure provided by the water jet for the drill bit should be 13Mpa or more, and the rotation torque should be the synthesis of friction torque and cutting torque. The friction torque of the drill bit mainly comprises the friction torque of the side face of the drill bit and the hole wall and the friction torque of the cutting teeth and the coal body, and the cutting torque is the torque for overcoming the uniaxial shear strength of the coal body. The parameters of the drill bit are selected according to the diameter of the drill bit and the size of the cutting teeth, and the parameters of the drill bit are selected according to the aperture of the coal hole. Taking a rotary drill bit with a diameter of 51mm, a length of 241mm and a weight of 5kg as an example of a horizontal coal hole, (taking a coefficient of friction between the coal hole and the drill bit as 0.5), the side friction torque T1 is 0.2413 N.m, the length of 3 cutting teeth is 3mm, the width of the 3 cutting teeth is 2mm, the sum T2 of the front friction torque and the side friction torque is 0.0006 N.m, the cutting torque T3 is 0.75 N.m, and the required rotary torque T is 0.9919 N.m. The pressure and the rotating torque are provided by water jet, and a forward front nozzle and three reverse rear nozzles are arranged on the basis of the case that the water pressure is 25Mpa and the diameter of the nozzle is 1.1 mm.
n is the number of the reverse nozzles, D is the diameter of the nozzles, P is the water pressure, L is the center distance of the nozzles, and alpha is the deflection angle of the nozzles in the horizontal and vertical directions with the axis of the drill bit.
The above figure substituted would be 73.
Beta is a horizontal included angle between the reverse nozzle and the axis of the drill bit.
The required propelling force of 78N can be obtained from the required pressure of 13MPa, and the required propelling force of 125N can be obtained by adding 47N resistance caused by the water jet of the forward nozzle, and the propelling force is 29 degrees calculated by the above formula.
The diameter of the coal hole influences the selection of the pipe diameter and the diameter of the drill bit to influence the friction torque, the axial compression strength and the pitching angle of different coals influence the friction resistance to influence the propelling force, the friction torque influences the alpha angle of the nozzle, and the friction resistance and the propelling force influence the beta angle.
The invention has the advantages that:
1. the coal hole repairing is carried out in a hydraulic combined mechanical mode, the three-wing cutting teeth are arranged at the front part of the three-wing drill bit with the cutting teeth and used for breaking coal, the coal breaking efficiency is improved, the middle nozzle is arranged, the formed jet flow is used for cooling, the reverse nozzle is arranged at the rear part of the three-wing drill bit, the jet flow is formed to provide power and remove slag, and the number of the forward nozzles is reduced, so that the resistance of the water jet flow of the forward nozzles is reduced, the resistance is greatly reduced, and the power is improved;
2. the coal breaking repair can be carried out by entering the drill hole through the extraction pipe, the drill hole is repaired without damaging hole sealing facilities, and the integrity of the drill hole is ensured;
3. the aperture of the coal hole influences the selection of the pipe diameter and the diameter of the drill bit so as to influence the friction torque, the axial pressure resistance and the pitch angle of different coals influence the friction resistance so as to influence the propelling force, the friction torque influences the alpha angle of the nozzle, and the friction resistance and the propelling force influence the beta angle;
4. the method can effectively repair the collapsed coal hole, avoids the waste of resources and funds for re-punching, has simple construction and simple and convenient operation, can provide a convenient and safe operation environment for constructors, accelerates the construction efficiency, saves the time, and can select the type of the drill bit according to the existing water pump by selecting the existing underground water pump as the high-pressure water pump.
Drawings
FIG. 1 is a schematic view of a rotary drill bit configuration of the present invention.
FIG. 2 is a schematic view of the cutter and nozzle arrangement of the drill bit of the present invention.
FIG. 3 is a schematic representation of the reverse nozzle angle of the drill bit of the present invention.
Fig. 4 is a schematic view of the drill bit of the present invention.
Fig. 5 is a schematic perspective view of the present invention.
Detailed Description
As shown in the figure, the hydraulic combined mechanical hole repairing device comprises a water tank 1 and a high-pressure water pump 2 connected with the water tank 1, wherein the water outlet end of the high-pressure water pump 2 is connected with a high-pressure rubber pipe 3 through a connecting joint 4, the high-pressure rubber pipe 3 is wound on a pipe coiling device 5, the other end of the high-pressure rubber pipe 3 is connected with a rotary drill bit 7 through the connecting joint 4, the rotary drill bit 7 comprises a rotating body 12 and a three-wing drill bit 21 with cutting teeth, the three-wing drill bit 21 is located at the front end of the rotating body 12 and is connected through threads, the drill bit 21 is provided with the three-wing cutting teeth and used for breaking coal during rotation, the coal breaking efficiency is improved, on one hand, the coal breaking repairing can be carried out through the extraction pipe entering a drill hole, the hole sealing facility is not required to be damaged, and the integrity of the drill hole is ensured while the drilling hole is repaired; on the other hand, the resistance is greatly reduced, and meanwhile, enough power can be provided for long drill hole repair; the rotating body 12 comprises an inlet connecting nut 9 and a cylindrical shell 19 which is in threaded connection with the right end of the inlet connecting nut 9, a shaft core 15 is arranged in the shell 19, a bearing 14 is respectively arranged between the outer sides of two ends of the shaft core 15 and the shell 19, a rotary sealing seat 13 is further arranged at one end, in contact with the inlet connecting nut 9, of the shaft core 15, and a speed limiting assembly is further arranged between the shaft core 15 and the shell 19 and used for reducing the rotating speed of the rotating body; the speed limiting assembly is arranged among the shaft core 15, the shell 19 and the bearings 14 at the two ends of the shaft core, and comprises a sleeve 17 sleeved at the outer end of the shaft core 15 and an annular weight block 16 positioned between the sleeve 17 and the shaft core 15, wherein a spring 18 is arranged between the annular weight block 16 and the bearing at the right end of the shaft core; three wing drill bits of area cutting teeth include central drill bit 21, and drill bit 21 comprises the toper sector at both ends and the cylinder cambered surface that is located the centre, evenly be equipped with three pterygoid lamina 25 along its circumferencial direction on the front end toper sector of drill bit 21, every pterygoid lamina 25 front end all is equipped with two circular salient cutting teeth 22, drill bit 21 center is equipped with a central nozzle 24, and the middle cylinder cambered surface of drill bit 21 is equipped with three evenly distributed's reversal nozzle 23 along its circumference, the injection direction of reversal nozzle 23 is the tangent line setting with central nozzle 24 edge, and this design has reduced the quantity of forward nozzle to reduce the resistance of forward nozzle water jet, compare in current drill bit, can provide bigger driving force. Compared with water jet coal breaking, the three-wing drill bit with the cutting teeth can efficiently break collapsed coal briquettes into smaller coal cinder to be discharged, so that the drilled holes are repaired more thoroughly, jet flow formed by the middle nozzle is used for cooling, the reverse nozzle is arranged at the rear part of the three-wing drill bit to form jet flow for providing power and removing cinder, and the number of the forward nozzles is reduced, so that the resistance of the water jet flow of the forward nozzles is reduced, the resistance is greatly reduced, the power is improved, the included angle between the injection direction of the reverse nozzle 23 and the axis of the drill bit is not less than 10 degrees, and the specific numerical value can be calculated according to the thrust required to be provided; the angle between the counter nozzle and the drill bit normal can be calculated from the torque required to restore the borehole. The arrangement angle of the nozzles can be designed according to different drilling conditions, so that the applicability of the device is increased, the wing plate 25 is a polygonal body with an irregular shape, the projection of the top surface of the wing plate 25 is a polygon with a tip part at one end formed by a rectangle and a triangle, the orthographic projection of the wing plate 25 at one end with cutting teeth is a right trapezoid, the projection of the side surface of the wing plate 25 is an irregular polygon formed by an upper trapezoid and a lower rectangle, a step-shaped notch is formed at the joint of the trapezoid and the rectangle, the cutting teeth are arranged on the plane where the trapezoid waist line at the notch is located, and the specific numerical value can be calculated according to the thrust required to be provided; the included angle between the reverse nozzle and the normal line of the drill bit can be calculated according to the torque required by repairing drilling, the jet flow formed by the middle nozzle 24 is used for cooling, the reverse nozzle is arranged at the rear part to form jet flow for providing power and removing slag, and the number of the forward nozzles is reduced, so that the resistance of the water jet flow of the forward nozzle is reduced, the resistance is greatly reduced, and the power is improved; a cavity is arranged in the drill bit 21, the cavity is respectively communicated with the central nozzle 24 and the reverse nozzle 23, the inlet connecting nut 9 and the rotary drill bit 7 are respectively internally provided with an injection cavity, and the injection cavity and the cavity are used for smoothly spraying water; the utility model discloses a rotary drill bit, including rotary seal seat, inlet connecting nut 9, reverse nozzle 23, rotary seal seat 13, the rotary seal seat is equipped with O shape sealing washer, guarantees that the rotary process is sealed intact between three reverse nozzle 23 along the plane evenly distributed at drill bit place, still be equipped with hand brake 6 on the pipe coiling ware, be equipped with the O shape sealing washer in the rotary seal seat 13, the left bearing left side of axle core is equipped with left side lip seal, and the bearing right side on axle core right side is equipped with right side lip seal 20 for it is sealed, prevent that the pollutant from getting into, still be equipped with overflow hole 11 on the inlet connecting nut 9, 11 terminal and left side lip seal plate UNICOM in overflow hole, there is the closing plate 10 sealed overflow hole outside, can prevent that the pollutant from getting into in high pressure seal seat and the sealed 13.
The drill bit 21 is connected with the rotating body shaft core 15 through threads, and the drill bit 21 is provided with three-wing cutting teeth 22 and is used for breaking coal during rotation; the drill bit 21 has three reverse nozzles 23. The coal hole repairing device is provided with a forward central nozzle 24, the forward central nozzle 24 and a drill bit shaft body form an included angle of 0 degree, jet flow is used for cooling, three reverse nozzles 23 are arranged one at every 120 degrees on the circumference of a drill bit and form a certain included angle with the horizontal direction of the drill bit axis to provide propelling force, a certain included angle with the horizontal direction and the vertical direction of the drill bit axis to provide torque, the diameter of a coal hole influences the selection of the pipe diameter and the diameter of the drill bit to influence friction torque, the axial pressure resistance and the elevation angle of different coals influence friction resistance to influence propelling force, the friction torque influences the alpha angle of the nozzle, and the friction resistance and the propelling force influence the beta angle.
A method for repairing coal holes by water jet self-propelled rotation by utilizing a hydraulic combined mechanical hole repairing device comprises the following steps:
(1) And (4) disassembling the joint of the extraction drill hole sealing pipe at the collapsed coal hole to be repaired without damaging hole sealing facilities.
(2) And (3) placing a rotary drill bit 7 into the extraction pipe 8, and opening a hand brake 6 of the high-pressure rubber pipe coiler.
(3) The high pressure water pump 2 is turned on and the pressure is adjusted to the desired value.
(4) The rear nozzle 23 of the rotary drill bit 7 provides forward power and torque, and the coal slag in the extraction pipe 8 is cleaned and continuously advanced. After the rotary drill bit 7 moves to the inside of a drill hole, the cutting teeth 22 at the front part of the drill bit 21 break coal, the water jet of the forward central nozzle 24 can reduce the temperature, and the coal slag is discharged out of the hole along with the water jet.
(5) The rotary drill bit 7 continuously advances to break the coal, and water flow discharges slag to gradually repair the collapsed coal hole.
(6) After repairing the collapsed coal hole, the high-pressure rubber pipe 3 is coiled up by rotating the hand brake 6 of the high-pressure rubber pipe coiler, and the rotary drill bit 7 is pulled out.
(7) And (4) repeating the steps (1) to (6) by selecting different nozzle parameters under different hole repairing conditions.
According to the invention, the coal hole repairing is completed in a hydraulic combined mechanical mode, on one hand, the coal can enter the drill hole through the extraction pipe for coal breaking repairing, the hole sealing facility does not need to be damaged, and the integrity of the drill hole is ensured while the drill hole is repaired; on the other hand, the resistance is greatly reduced, and simultaneously, enough power can be provided for long-drill hole repair. The invention can avoid the waste of resources and funds for re-punching. The construction is simple, and is easy and simple to handle, can provide a convenient safe operation environment for the constructor to accelerated the efficiency of construction, saved the time, in addition, the current water pump in the pit can be chooseed for use to the high pressure water pump, can select the drill bit type according to current water pump.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (7)
1. A hydraulic combined mechanical hole repairing device is characterized in that: the high-pressure rubber hose winding device comprises a water tank and a high-pressure water pump connected with the water tank, wherein the water outlet end of the high-pressure water pump is connected with a high-pressure rubber hose through a connecting joint, the high-pressure rubber hose is wound on a hose coiling device, the other end of the high-pressure rubber hose is connected with a rotary drill bit through the connecting joint, and the rotary drill bit comprises a rotating body and a three-wing drill bit with cutting teeth, which is positioned at the front end of the rotating body and connected through threads; the rotating body comprises an inlet connecting nut and a cylindrical shell which is in threaded connection with the right end of the inlet connecting nut, a shaft core is arranged in the shell, a bearing is respectively arranged between the outer sides of two ends of the shaft core and the shell, a rotating sealing seat is further arranged at one end of the shaft core, which is in contact with the inlet connecting nut, and a speed limiting assembly is further arranged between the shaft core and the shell; the speed limiting assembly is arranged among the shaft core, the shell and bearings at two ends of the shaft core, and comprises a sleeve sleeved at the outer end of the shaft core and an annular weight block positioned between the sleeve and the shaft core, wherein a spring is arranged between the annular weight block and the bearing at the right end of the shaft core; the three-wing drill bit with the cutting teeth comprises a central drill bit, the three-wing drill bit with the cutting teeth consists of conical sectors at two ends and a cylindrical cambered surface located in the middle, three wing plates are evenly arranged on the conical sector at the front end of the three-wing drill bit with the cutting teeth along the circumferential direction of the conical sector, two cutting teeth protruding in a circular shape are arranged at the front end of each wing plate, a central nozzle is arranged at the center of the three-wing drill bit with the cutting teeth, three evenly distributed reverse nozzles are arranged on the middle cylindrical cambered surface of the drill bit along the circumference of the middle cylindrical cambered surface of the drill bit, and the spraying directions of the reverse nozzles and the edge of the central nozzle are in tangent line arrangement.
2. The hydromechanical combination hole drilling device of claim 1, wherein: the contained angle of the injection direction of reverse nozzle and drill bit axis is not less than 10, the pterygoid lamina is irregular shape's multilateral body, the top surface projection of pterygoid lamina has the polygon of point portion for the one end that rectangle and triangle-shaped constitute, and the orthographic projection that has cutting tooth one end of pterygoid lamina is right trapezoid, and the projection of pterygoid lamina side is the irregular polygon that upper portion is trapezoidal and the lower part rectangle is constituteed, and trapezoidal and rectangle junction is equipped with step form breach, the cutting tooth sets up in the plane at breach department trapezoidal stringcourse place.
3. The hydromechanical combination hole drilling device of claim 2, wherein: the three-wing drill bit with the cutting teeth is internally provided with a cavity, the cavity is respectively communicated with the central nozzle and the reverse nozzle, and the inlet connecting nut and the rotary drill bit are internally provided with spraying cavities.
4. The hydromechanical boreholder device of claim 3, wherein: the number of the reverse nozzles is three, the three reverse nozzles are uniformly distributed along the plane where the drill bit is located, and the pipe coiling device is further provided with hand brakes.
5. The hydromechanical boreholder device of claim 4, wherein: an O-shaped sealing ring is arranged in the rotary sealing seat, a left lip seal is arranged on the left side of the bearing on the left side of the shaft core, and a right lip seal is arranged on the right side of the bearing on the right side of the shaft core.
6. The hydromechanical boreholder device of claim 5, wherein: still be equipped with the overflow hole on the entry coupling nut, overflow hole end and left side lip closing plate UNICOM, the overflow hole outside is equipped with the closing plate.
7. The method for repairing coal holes by water jet self-propelled rotation by utilizing the hydraulic combined mechanical hole repairing device of any one of claims 1 to 6 is characterized by comprising the following steps:
(1) Disassembling the extraction drill hole sealing pipe joint at the collapsed coal hole to be repaired;
(2) Placing a rotary drill bit into the extraction pipe, and opening a hand brake of a high-pressure rubber pipe coiler;
(3) Starting the high-pressure pump and adjusting the pressure to a required value;
(4) The rear nozzle of the rotary drill bit provides forward power and torque, so that the drill bit can clean coal slag in the extraction pipe and continuously move, the drill bit continuously breaks coal after the rotary drill bit moves into the drilled hole, and the water jet discharges the coal slag out of the coal hole to achieve the purpose of repairing the collapsed coal hole;
(5) After repairing one coal hole, operating the high-pressure rubber tube coiler to coil up the rubber tube and pulling out the rotary drill bit;
(6) And (5) under different hole repairing conditions, selecting different nozzle parameters to rotate the drill bit, and repeating the steps (1) - (5).
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| CN113944431A (en) * | 2021-12-20 | 2022-01-18 | 成都迪普金刚石钻头有限责任公司 | Hydraulic auxiliary rock breaking PDC drill bit and auxiliary rock breaking method |
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| CN100485163C (en) * | 2007-09-07 | 2009-05-06 | 重庆大学 | Coal bed gas drainage method and device |
| CN102031931B (en) * | 2010-11-23 | 2012-10-10 | 中矿瑞杰(北京)科技有限公司 | Self-rotating jet drilling device |
| CN103291219B (en) * | 2013-06-29 | 2014-12-17 | 河南理工大学 | Drilling and punching integrated hydraulic drill bit |
| CN103721876B (en) * | 2013-12-18 | 2016-03-30 | 新疆通奥油田技术服务有限公司 | Shower nozzle and cleaning device |
| CN104481580B (en) * | 2014-12-23 | 2016-08-17 | 河南理工大学 | A kind of down-hole coal bed mash gas pumping drilling restorative procedure and the device of use thereof |
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