CN103437705A - Directional and quick hole-forming device for mining-coal bed gas extraction multi-branch holes - Google Patents
Directional and quick hole-forming device for mining-coal bed gas extraction multi-branch holes Download PDFInfo
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- CN103437705A CN103437705A CN2013103614532A CN201310361453A CN103437705A CN 103437705 A CN103437705 A CN 103437705A CN 2013103614532 A CN2013103614532 A CN 2013103614532A CN 201310361453 A CN201310361453 A CN 201310361453A CN 103437705 A CN103437705 A CN 103437705A
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Abstract
A directional and quick hole-forming device for mining-coal bed gas extraction multi-branch holes comprises an anti-explosion motor, a drill stem connected with the anti-explosion motor in a transmission mode, a drilling system, a jet flow punching system and an orienting system. A conical drill bit is arranged at the front end of the drill stem, high-pressure water flow of the drilling system enters the system from the rear end of the drill stem and is discharged out from the front end of the conical drill bit, the orienting system is arranged on the front portion of the drill stem, and high-pressure water flow of the jet flow punching system enters the system from the outer side of the rear end of the drill stem and is jetted out from the middle portion of the conical drill bit. The directional and quick hole-forming device is reasonable in design, simple in structure and capable of realizing effective control over each branch direction through accurate orientating of the water jetting direction by the orientating system and reasonable jet flow eyelet direction arrangement. According to the directional and quick hole-forming device, different types of multi-branch drilling can be conducted according to the difference of drainage radiuses caused by the difference of deep hole breathability coefficients, original gas drainage blind areas and gas drainage overlapped areas caused by a fixed hole distance are effectively reduced, cost is lowered and the safety coefficient is greatly increased.
Description
Technical field
The invention belongs to the Safety of Coal Mine Production technical field, relate in particular to a kind of coal bed gas extraction multiple-limb hole orientation, fast pore-creating device.
Background technology
Coal is in the Chinese national economy construction, and very important status is occupied in the energy demand aspect.Along with the increase of country to coal demand, the coal mining degree of depth and mining rate are also increasing year by year.Along with the increase of the coal mining degree of depth and mining rate, gas bearing capacity, gas pressure are also increasing gradually, have increased the possibility of coal and Gas Outburst.The gas bearing capacity reduced in coal seam is one of Important Action reduced coal and Gas Outburst possibility.The method that reduces coal seam gas-bearing capacity has a lot, and by play extraction boring in coal seam or top, floor strata, to carry out gas drainage under suction be current one of the measure more widely of applying at present.
Raising along with the coal mining mechanization degree, compared with the past, great variety has also occurred in the length of coal-face, width, face length is longer, width is also wider, in order to reduce more effectively and rapidly the gas of coal-face, boring length also develops into even nearly 1000 meters of present hundreds of rice by original tens meters.Along with the increase of drilling depth, the otherness of the different depth extraction effective radius that the otherness of different depth Permeability Coefficent in Coal Seam, the otherness of negative pressure of suction etc. causes highlights.And the design of the current spacing of wells is that the drainage radius drawn according to the calculating such as shallow bore hole gas permeability of coal seam, negative pressure of suction or experience carries out mostly.Darker when drilling depth, when gas permeability of coal seam changes greatly, adopt roughly the same pitch of holes to be constructed, excessive some the regional gas bearing capacities that may cause of spacing can not effectively reduce, and form the blind area of gas pumping; Spacing is too small may be caused at some region overlappings, causes the waste of resource.
Coal seam is the rock that a kind of non-homogeneity is very strong, otherness due to cracks in coal seam width, length, direction, density etc., cause the gas permeability in coal seam in same boring may have very large otherness, and then while causing carrying out extraction, if do not consider the variation of gas permeability of coal seam with drilling depth, what may cause some regional gas bearing capacities to reduce is fast, and some regional gas bearing capacities are difficult to descend, and can not effectively reduce the danger of coal and Gas Outburst.
Carrying out multi-branch horizontal drilling under coal mine is the technology that development in recent years is got up.If multi-branch horizontal drilling is more reasonable because of the large son field layout of its control area, extraction effect is more satisfactory.If branch's spacing, position of opening are unreasonable, easily cause gas drainage under suction overlay region or extraction blind area, not only affect the extraction effect, and may cause coal and Gas Outburst.Simultaneously, carry out multiple-limb boring in coal seam, cost compare is high, rationally carries out the designs of perforate and hole depth and seems extremely important.The existence of coal seam reservoirs non-homogeneity, cause the gas permeability difference under a main different depth, to the extraction effect, can produce material impact.
Therefore, in the urgent need to a kind of drainage device and extraction technique thereof, can be according to the difference of the Permeability Coefficent in Coal Seam of different drilling depths, carry out the gas pumping design and construction, both realized evenly reducing coal seam gas-bearing capacity in the extraction district, reduced again unnecessary operating expenses, realized safety, the High-efficient Production in colliery simultaneously.
Summary of the invention
The present invention is directed to the spacing of wells in the gun drilling construction of this coal bed gas extraction of current down-hole and with change in depth, easily do not cause the problem of pumping blind zone and extraction overlay region, the invention provides that a kind of coal bed gas extraction multiple-limb hole is directed, the fast pore-creating device.Can determine according to Permeability Coefficent in Coal Seam branch's progression, the number of branches in this coal bed gas extraction multiple-limb hole with the variation of the degree of depth by this device, and to multiple-limb hole fast drilling, and then reach the purpose of even reduction extraction district coal seam gas-bearing capacity, reduce the danger of coal and Gas Outburst.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: this coal bed gas extraction multiple-limb hole is directed, the fast pore-creating device, the drilling rod 19, drilling system, jet punching system and the orientation system that comprise fire-proof motor 6, be in transmission connection with fire-proof motor 6, drilling rod 19 front ends are provided with conical drill bit 8, the High-Pressure Water of drilling system is entered from conical drill bit 8 front ends discharges by the rear end central authorities of drilling rod 19, orientation system is located at drilling rod 19 front portions, outside the rear end of the High-Pressure Water of jet punching system by drilling rod 19, enters from conical drill bit 8 middle parts and ejects.
Described drilling system comprises water tank 1, along drilling rod 19 central axiss to the water inlet central passage 7 arranged and be located at three high pressure spray water holes 27 on conical drill bit 8, water inlet central passage 7 water inlets are provided with the first union 4, when drilling rod 19 High Rotation Speed, the first union 4 maintains static and is communicated with by the first seal 18 and the second seal 17 sealings with water inlet central passage 7; The water inlet that the first union 4 is provided with the first valve 25, the first unions 4 is connected with water tank 1 by the first high-pressure intake pipe 3, and the delivery port of water inlet central passage 7 is communicated with three high pressure spray water holes 27, and large discharge capacity water pump 2 is arranged on the first high-pressure intake pipe 3.
Described jet punching system comprises four water inlet edge gateways 21 that axially are evenly arranged along drilling rod 19 and is located at four high-pressure spray holes 26 on conical drill bit 8, high-pressure spray hole 26 is positioned at high pressure spray water hole 27 rear sides, and the water inlet of four water inlet edge gateways 21 is respectively equipped with second union 15; The second union 15 is provided with the second valve 16, the water inlet of four the second unions 15 is connected with water tank 1 by second high-pressure intake pipe 11, the delivery port of each water inlet edge gateway 21 is corresponding respectively to be connected with a high-pressure spray hole 26, the center line of the injection direction in high-pressure spray hole 26 and drilling rod 19 is the angle of 10 °, on the second high-pressure intake pipe 11, along water (flow) direction, is provided with in turn high-pressure hydraulic pump 12 and pressure meter 13.
Described orientation system comprise be positioned at the outer power supply of drilling rod 19 and be located at drilling rod 19 and with the homoaxial columniform liquid storage cylinder 30 of drilling rod 19, be loaded with the insulating oil 33 that accounts for liquid storage cylinder 30 half volume in liquid storage cylinder 30, liquid storage cylinder 30 two ends are respectively equipped with a riser 29 be fixedly connected with drilling rod 19, wherein a riser 29 is provided with the fixed axis 31 that is positioned at the rivet shape on liquid storage cylinder 30 center lines, be rotatably connected to the conducting rod 32 swum on insulating oil 33 liquid levels on fixed axis 31, the outer end of conducting rod 32 and liquid storage cylinder 30 inwalls are slidably connected, liquid storage cylinder 30 is made by resistance material, be provided with vertically plastic insulation piece 35 one at sidepiece on liquid storage cylinder 30, be connected with the first wire 34 that is positioned at plastic insulation piece 35 upsides on liquid storage cylinder 30, fixed axis 31 is connected with the second wire 20, the other end of the first wire 34 and the second wire 20 is connected with power supply respectively, the first wire 34 or the second wire 20 are provided with ammeter 14.
The anterior outside of described drilling rod 19 is provided with the hole enlargement body 23 that is positioned at conical drill bit 8 rear sides.
Described fire-proof motor 6 is fixed on base 5, and base 5 is provided with bracing frame 10, and drilling rod 19 is rotatably connected on bracing frame 10, and the main shaft of fire-proof motor 6 and drilling rod 19 are in transmission connection by V-belt or belt 9.
Described conical drill bit 8 surfaces are provided with diamond drilling tooth 24.
Adopt technique scheme, drilling system mainly completes and creeps into, and the effect that coal dust is discharged.Drilling system is realized the guide effect after jet by conical drill bit.The diamond drilling tooth is installed at cutting position at conical drill bit, realizes that fly-cutting reduces the wearing and tearing of drill bit.For fear of drilling tool wearing and tearing in drilling process, cause bore diameter to reduce, in the drilling rod surrounding, the hole enlargement body has been installed, can effectively reduce aperture and dwindle.The coal dust produced in drilling process is mainly by the circular passage output between drilling rod and coal seam, the effect that the water flow through from drilling rod not only can cooling conical drill bit, and can effectively take coal dust out of.
While carrying out the construction of multiple-limb hole, in order to complete creeping into of branch, need constantly to change the orientation of creeping in drilling process, the jet punching system is mainly to construct by water jet, realizes turning to and pore-forming of branched hole.
Carry out jet when construction according to working design, this device can be realized 360 ° of arbitrarily angled constructions, this only with horizontal direction on turning to pore-forming of right side branched hole describe.Define one group of jet eyelet when the horizontal direction according to orientation system, open second valve on right side, can form a jet drilling in the direction on 10 °, right side of deflection, subsequently in the effect inferior division hole of this pilot hole gradually the direction on 10 °, along continuous straight runs and deflection right side creep into.After reaching preset distance, according to orientation system, when one group of high-pressure spray eyelet is arranged in horizontal direction, open second valve in left side, according to the straight line parallel principle, this direction is identical with prime direction, so just can complete creeping into of secondary two one of them branch of branch hole, for other many classifications of multiple-limb situation, construction technology is identical.
High-pressure spray hole in the jet punching system is the surrounding that 90 degree are evenly distributed on conical drill bit, and the high-pressure spray hole is arranged in the spherical part of conical drill bit, and jet orifice direction and drill rod axis are the angle of 10 °.In drilling process, the water inlet central passage is controlled its closure by the first valve, in the time of need to carrying out the jet pore-forming, as requested high-pressure hydraulic pump is connected on the second different unions, implements variation in water pressure in the observation jet process by pressure meter, in order to adjust in time.
In order to eliminate gas pumping blind area and extraction overlay region as far as possible, designed multiple-limb boring.The position of opening of multiple-limb boring, between the permeability coefficient of the different depth tested and drilling depth, carrying out matching, draws the relation of permeability coefficient and drilling depth, and then branch is designed.When the position of opening of designing multiple-limb and perforate orientation, in order to make branched hole, according to the orientation of design, crept into, designed this orientation system, realize the orientation of branched hole.
The design of orientation system be based on liquid level always principle in level designed.Installing one in the liquid storage cylinder center of hollow can be around the conducting rod of center rotating, the outer end of conducting rod contacts with the inner wall edge of liquid storage cylinder, wherein the ring edge of liquid storage cylinder is an annular electro resistance body, the fixed end of conducting rod and liquid storage cylinder one end are connected with the first wire by the second wire respectively, and the increase power supply, just can form one with the rheostatic loop of Simple sliding.By the orientation in high-pressure spray hole rationally is set, while making electric current maximum, wherein must there is one group of two corresponding high-pressure spray hole line just to be horizontal.So just can, according to the reading of ammeter, the jet orifice orientation accurately be judged.Form parallel circuit for fear of whole circuit when the design liquid storage cylinder, the impact judgement.When whole circuital current is maximum, liquid storage cylinder is cut in the lower end of the liquid storage cylinder position contacted from conducting rod, and a plastic insulation piece is connected between otch, can effectively avoid so whole circuit to form parallel connection.
Riser is that thickness is 1cm, length and width is the steel plate of 2.5cm, take the center of riser upper surface is a cylinder that diameter is 0.5cm as 2cm, thickness of center of circle excision, by the another one external diameter, be 2cm, high for the hollow of 0.5cm, be fixed on the position after riser excises cylinder with the cylindrical liquid storage cylinder in the end.The fixing upper liquid storage cylinder of internal diameter and the plastic insulation piece of being close to liquid storage cylinder.Get again a riser, and on this riser surface, one deck rubber bodies is installed.Fixed axis is installed in center on this riser surface, and the inner of conducting rod is rotatably connected on fixed axis.Fixed axis is fixed by welding on riser.Conducting rod is that mild steel is made, and has toughness preferably, can slight curvature, can guarantee that like this itself and liquid storage cylinder inwall are always in connection status.According to the size of conducting rod gravity, at himself fixed foam floating body, it just can be swum on liquid level.The liquid storage cylinder and the fixed axis that are connected respectively plastics collets top by the first wire and the second wire, connect power supply and form loop later, observes the variation of electric current by ammeter.After half insulating oil of injection capacity, by being bolted on together between two risers, by the sealing of intermediate rubber body, can guarantee that insulating oil does not flow out in liquid storage cylinder.Finally by welding, riser is fixed on drilling rod.
Fire-proof motor is arranged on base by fixed head.Fixedly being fixed by bracing frame of drilling rod, bracing frame is weldingly fixed on base, reduces rocking of installing in work progress as far as possible.Base plays fixing effect to fire-proof motor and drilling rod.
For fear of the water that injects drilling rod, in drilling rod, flow out, be provided with the first seal and the second seal, the first seal is fixedly connected with drilling rod, the second seal is fixedly connected with the first union, the first seal and the second seal bending the cooperation that intersects are provided with the ring packing rubber pad between the first seal and the second seal.Ingehious design between the first seal and the second seal can effectively reduce a large amount of outflows of drilling rod internal water, has so not only reduced the outflow waste of water, and continuous water filling impacts to water inlet to have avoided the drilling rod rotation.
The present invention is reasonable in design, simple in structure, by orientation system, to the accurate orientation of water jet direction and reasonably jet eyelet direction setting, can realize effective control of each branch direction.
The difference of the drainage radius that the present invention can cause according to the difference of deep hole permeability coefficient, the multiple-limb boring of constructing dissimilar, effectively reduced the fixing hole spacing causes in the past gas drainage under suction blind area or extraction overlay region, cost, safety factor increases greatly.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is A-A profile in Fig. 1;
Fig. 3 is that C in Fig. 1 is to view;
Fig. 4 is the lateral view of orientation system in Fig. 1;
Fig. 5 is the main aperture of drainage holes and the first structural representation of branched hole;
Fig. 6 is the main aperture of drainage holes and the second structural representation of branched hole;
Fig. 7 is the main aperture of drainage holes and the third structural representation of branched hole;
Fig. 8 is the main aperture of drainage holes and the 4th kind of structural representation of branched hole;
Fig. 9 is the main aperture of drainage holes and the 5th kind of structural representation of branched hole.
The specific embodiment
As shown in Figure 1 to 4, of the present invention coal bed gas extraction multiple-limb hole orientation, the fast pore-creating device, this coal bed gas extraction multiple-limb hole orientation, the fast pore-creating device, comprise fire-proof motor 6, the drilling rod 19 be in transmission connection with fire-proof motor 6, drilling system, jet punching system and orientation system, drilling rod 19 front ends are provided with conical drill bit 8, the High-Pressure Water of drilling system is entered from conical drill bit 8 front ends discharges by the rear end central authorities of drilling rod 19, orientation system 22 is located at drilling rod 19 front portions, enter from conical drill bit 8 middle parts and eject outside the rear end of the High-Pressure Water of jet punching system by drilling rod 19.
Drilling system comprises water tank 1, along drilling rod 19 central axiss to the water inlet central passage 7 arranged and be located at three high pressure spray water holes 27 on conical drill bit 8, water inlet central passage 7 water inlets are provided with the first union 4, when drilling rod 19 High Rotation Speed, the first union 4 maintains static and is communicated with by the first seal 18 and the second seal 17 sealings with water inlet central passage 7; The water inlet that the first union 4 is provided with the first valve 25, the first unions 4 is connected with water tank 1 by the first high-pressure intake pipe 3, and the delivery port of water inlet central passage 7 is communicated with three high pressure spray water holes 27, and large discharge capacity water pump 2 is arranged on the first high-pressure intake pipe 3.
The jet punching system comprises four water inlet edge gateways 21 that axially are evenly arranged along drilling rod 19 and is located at four high-pressure spray holes 26 on conical drill bit 8, high-pressure spray hole 26 is positioned at high pressure spray water hole 27 rear sides, and the water inlet of four water inlet edge gateways 21 is respectively equipped with second union 15; The second union 15 is provided with the second valve 16, the water inlet of four the second unions 15 is connected with water tank 1 by second high-pressure intake pipe 11, the delivery port of each water inlet edge gateway 21 is corresponding respectively to be connected with a high-pressure spray hole 26, the center line of the injection direction in high-pressure spray hole 26 and drilling rod 19 is the angle of 10 °, on the second high-pressure intake pipe 11, along water (flow) direction, is provided with in turn high-pressure hydraulic pump 12 and pressure meter 13.
The anterior outside of drilling rod 19 is provided with the hole enlargement body 23 that is positioned at conical drill bit 8 rear sides.
Fire-proof motor 6 is fixed on base 5, and base 5 is provided with bracing frame 10, and drilling rod 19 is rotatably connected on bracing frame 10, and the main shaft of fire-proof motor 6 and drilling rod 19 are in transmission connection by V-belt or belt 9.
Conical drill bit 8 surfaces are provided with diamond drilling tooth 24, and diamond drilling tooth 24 has high hardness, is specially adapted for creeping into the coal seam of many gangues, has greatly improved the application life of drilling rod.
Drilling system mainly completes and creeps into, and the effect that coal dust is discharged.Drilling system is realized the guide effect after jet by conical drill bit 8.Diamond drilling tooth 24 is installed at cutting position at conical drill bit 8, realizes that fly-cutting reduces the wearing and tearing of conical drill bit 8.For fear of drilling tool wearing and tearing in drilling process, cause bore diameter to reduce, in drilling rod 19 surroundings, hole enlargement body 23 has been installed, can effectively reduce aperture and dwindle.The coal dust produced in drilling process is mainly by the circular passage output between drilling rod 19 and coal seam, the effect that the water flow through from drilling rod 19 not only can cooling conical drill bit 8, and can effectively take coal dust out of.
While carrying out the construction of multiple-limb hole, in order to complete creeping into of branch, need constantly to change the orientation of creeping in drilling process, the jet punching system is mainly to construct by water jet, realizes turning to and pore-forming of branched hole.
Carry out jet when construction according to working design, this device can be realized 360 ° of arbitrarily angled constructions, this only with horizontal direction on turning to pore-forming of right side branched hole describe.Define 26, one group of high-pressure spray hole when the horizontal direction according to orientation system 22, open second valve 16 on right side, can form a jet drilling in the direction on 10 °, right side of deflection, subsequently in the effect inferior division hole of this pilot hole gradually the direction on 10 °, along continuous straight runs and deflection right side creep into.After reaching preset distance, according to orientation system 22, when one group of jet eyelet is arranged in horizontal direction, open second valve 16 in left side, according to the straight line parallel principle, this direction is identical with prime direction, so just can complete creeping into of secondary two one of them branch of branch hole, for other many classifications of multiple-limb situation, construction technology is identical.
High-pressure spray hole 26 in the jet punching system is the surrounding that 90 degree are evenly distributed on conical drill bit 8, and high-pressure spray hole 26 is arranged in the spherical part of conical drill bit 8, and high-pressure spray hole 26 directions and drilling rod 19 axis are the angle of 10 °.In drilling process, water inlet central passage 7 is controlled its closure by the first valve 25, in the time of need to carrying out the jet pore-forming, as requested high-pressure hydraulic pump 12 is connected on the second different unions 15, implements variation in water pressure in the observation jet process by pressure meter 13, in order to adjust in time.
In order to eliminate gas pumping blind area and extraction overlay region as far as possible, designed multiple-limb boring.The position of opening of multiple-limb boring mainly, by the permeability coefficient of the different depth tested, adopts the method for prediction to obtain.When the position of opening of designing multiple-limb and perforate orientation, in order to make branched hole, according to the orientation of design, crept into, designed this orientation system 22, realize the orientation of branched hole.
The design of orientation system 22 be based on liquid level always principle in level designed.Installing one in liquid storage cylinder 30 centers of hollow can be around the conducting rod 32 of center rotating, the outer end of conducting rod 32 contacts with the inner wall edge of liquid storage cylinder 30, wherein the ring edge of liquid storage cylinder 30 is an annular electro resistance body, the fixed end of conducting rod 32 and liquid storage cylinder 30 1 ends are connected with the first wire 34 by the second wire 20 respectively, and increase power supply (the not shown in the figures meaning out), just can form one with the rheostatic loop of Simple sliding.By 26 orientation, high-pressure spray hole rationally is set, while making electric current maximum, wherein must there is one group of two corresponding high-pressure spray hole line just to be horizontal.So just can, according to the reading of ammeter 14,26 orientation, high-pressure spray hole accurately be judged.Form parallel circuit for fear of whole circuit when design liquid storage cylinder 30, the impact judgement.When whole circuital current is maximum, liquid storage cylinder 30 is cut in the lower end of liquid storage cylinder 30 positions that contact from conducting rod 32, and a plastic insulation piece 35 is connected between otch, can effectively avoid so whole circuit to form parallel connection.
Fire-proof motor 6 is arranged on base 5 by fixed head.Fixedly being fixed by bracing frame 10 of drilling rod 19, bracing frame 10 is weldingly fixed on base 5, reduces rocking of installing in work progress as far as possible.5 pairs of fire-proof motors 6 of base and drilling rod 19 play fixing effect.
For fear of the water that injects drilling rod 19 from the interior outflow of drilling rod 19, be provided with the first seal 18 and the second seal 17, the first seal 18 is fixedly connected with drilling rod 19, the second seal 17 is fixedly connected with the first union 4, the first seal 18 and the second seal 17 bendings the cooperation that intersects are provided with the ring packing rubber pad between the first seal 18 and the second seal 17.Ingehious design between the first seal 18 and the second seal 17 can effectively reduce a large amount of outflows of drilling rod 19 internal water, has so not only reduced the outflow waste of water, and continuous water filling impacts to water inlet to have avoided drilling rod 19 rotations.
Is the structure that drainage holes is drilled to rear main aperture 37 and branched hole 38 as shown in Fig. 5-9.Certainly, the concrete shape structure is determined by actual needs.
The present invention can meet creeping into of multiple progression, branch, at this, only with the drilling process of two-stage, second level Si Ge branch, is described, and construction sequence is:
1), according to this district's geological condition, the permeability coefficient of the different depth carried out in advance size test result, determine the extraction radius of boring different depth.
2) Changing Pattern with drilling depth according to Permeability Coefficent in Coal Seam, design and calculate branch's progression, number of branches, the degree of depth at different levels in this multiple-limb gas pumping hole, coal seam.
3) the present invention is moved to pre-construction location, after checking, assembled, fix.
4) open large discharge capacity water pump 2 and fire-proof motor 6 and start creeping into of boring, creep into precalculated position, complete the one-level drilling depth.
5) close large discharge capacity water pump 2, according to ammeter 14 reading sizes, slowly regulate drilling rod 19, until the ammeter reading reaches maximum, stop regulating, close fire-proof motor 6.
6) connect the high-pressure water jet pipeline on right side, open high-pressure hydraulic pump 12, carry out high-pressure water jet, form the perforate of certain depth on a side position of boring, until reach projected depth.
7) close high-pressure hydraulic pump 12, disconnect the jet pipeline.
8) open large discharge capacity water pump 2 and fire-proof motor 6 and crept into along perforate, until reach desired depth.
9) close large discharge capacity water pump 2, according to the ammeter reading, again regulate drilling rod 19, when ammeter 14 readings are maximum, stop regulating, close fire-proof motor 6.
10) connect the high-pressure water jet pipeline in left side, open high-pressure hydraulic pump 12, carry out high-pressure water jet, form the perforate of certain depth at the design attitude of boring, until reach projected depth.
11) close high-pressure hydraulic pump 12, disconnect the jet pipeline.
12) open large discharge capacity water pump 2 and fire-proof motor 6, until be drilled into predetermined drilling depth.
13) drilling process of other three branches of three directions is identical with this branch, does not repeat them here.Only need to complete successively to creep into according to the method described above to get final product.
14) after the boring of all branches that hole that completed design, instrument is shifted out from boring.
15) pipeline is cleaned, arranged.
16) sealing drilling orifice, connect methane gas extraction pipeline and carry out gas pumping.
The present embodiment is not done any pro forma restriction to shape of the present invention, material, structure etc.; any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all belong to the protection domain of technical solution of the present invention.
Claims (7)
1. this coal bed gas extraction multiple-limb hole orientation, the fast pore-creating device, it is characterized in that: comprise fire-proof motor (6), the drilling rod (19) be in transmission connection with fire-proof motor (6), drilling system, the jet punching system, and orientation system, drilling rod (19) front end is provided with conical drill bit (8), the High-Pressure Water of drilling system is entered from conical drill bit (8) front end and is discharged by the rear end central authorities of drilling rod (19), orientation system is located at drilling rod (19) front portion, enter from conical drill bit (8) middle part and eject outside the rear end of the High-Pressure Water of jet punching system by drilling rod (19).
2. according to claim 1 coal bed gas extraction multiple-limb hole orientation, the fast pore-creating device, it is characterized in that: described drilling system comprises water tank (1), along drilling rod (19) central axis to the water inlet central passage (7) arranged and be located at three the high pressure spray water holes (27) on conical drill bit (8), water inlet central passage (7) water inlet is provided with the first union (4), when drilling rod (19) High Rotation Speed, the first union (4) maintains static and is communicated with by the first seal (18) and the second seal (17) sealing with water inlet central passage (7), the first union (4) is provided with the first valve (25), the water inlet of the first union (4) is connected with water tank (1) by the first high-pressure intake pipe (3), the delivery port of water inlet central passage (7) is communicated with three high pressure spray water holes (27), and large discharge capacity water pump (2) is arranged on the first high-pressure intake pipe (3).
3. directed, the fast pore-creating device according to claim 2 coal bed gas extraction multiple-limb hole, it is characterized in that: described jet punching system comprises four water inlet edge gateways (21) that axially are evenly arranged along drilling rod (19) and is located at four the high-pressure spray holes (26) on conical drill bit (8), high-pressure spray hole (26) is positioned at high pressure spray water hole (27) rear side, and the water inlet of four water inlet edge gateways (21) is respectively equipped with second union (15); The second union (15) is provided with the second valve (16), the water inlet of four the second unions (15) is connected with water tank (1) by second high-pressure intake pipe (11), the delivery port of each water inlet edge gateway (21) is corresponding respectively to be connected with a high-pressure spray hole (26), the center line of the injection direction in high-pressure spray hole (26) and drilling rod (19) is the angle of 10 °, and the second high-pressure intake pipe (11) is upper is provided with high-pressure hydraulic pump (12) and pressure meter (13) in turn along water (flow) direction.
4. according to claim 1 or 2 or 3 described coal bed gas extraction multiple-limb hole orientations, the fast pore-creating device, it is characterized in that: described orientation system comprise be positioned at the outer power supply of drilling rod (19) and be located at drilling rod (19) and with the homoaxial columniform liquid storage cylinder of drilling rod (19) (30), be loaded with the insulating oil (33) that accounts for half volume of liquid storage cylinder (30) in liquid storage cylinder (30), liquid storage cylinder (30) two ends are respectively equipped with a riser (29) be fixedly connected with drilling rod (19), wherein a riser (29) is provided with the fixed axis (31) that is positioned at the rivet shape on liquid storage cylinder (30) center line, be rotatably connected to the conducting rod (32) swum on insulating oil (33) liquid level on fixed axis (31), the outer end of conducting rod (32) and liquid storage cylinder (30) inwall are slidably connected, liquid storage cylinder (30) is made by resistance material, liquid storage cylinder (30) is upper is provided with one plastic insulation piece (35) vertically at sidepiece, be connected with the first wire (34) that is positioned at plastic insulation piece (35) upside on liquid storage cylinder (30), fixed axis (31) is connected with the second wire (20), the first wire (34) is connected with power supply respectively with the other end of the second wire (20), the first wire (34) or the second wire (20) are provided with ammeter (14).
5. directed, the fast pore-creating device according to claim 4 coal bed gas extraction multiple-limb hole, it is characterized in that: the anterior outside of described drilling rod (19) is provided with the hole enlargement body (23) that is positioned at conical drill bit (8) rear side.
6. directed, the fast pore-creating device according to claim 4 coal bed gas extraction multiple-limb hole, it is characterized in that: described fire-proof motor (6) is fixed on base (5), base (5) is provided with bracing frame (10), it is upper that drilling rod (19) is rotatably connected on bracing frame (10), and the main shaft of fire-proof motor (6) and drilling rod (19) are in transmission connection by V-belt or belt (9).
7. directed, the fast pore-creating device according to claim 4 coal bed gas extraction multiple-limb hole, it is characterized in that: described conical drill bit (8) surface is provided with diamond drilling tooth (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310361453.2A CN103437705B (en) | 2013-08-19 | 2013-08-19 | Directional and quick hole-forming device for mining-coal bed gas extraction multi-branch holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310361453.2A CN103437705B (en) | 2013-08-19 | 2013-08-19 | Directional and quick hole-forming device for mining-coal bed gas extraction multi-branch holes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103437705A true CN103437705A (en) | 2013-12-11 |
| CN103437705B CN103437705B (en) | 2015-06-03 |
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| CN103758454A (en) * | 2014-01-21 | 2014-04-30 | 河南理工大学 | Pore forming, pit building, powder stamping and pressure relief integrated device in soft coal development area |
| CN104121011A (en) * | 2014-07-16 | 2014-10-29 | 中煤科工集团重庆研究院有限公司 | Drilled hole effective extraction radius measuring method based on gas content method |
| CN113431497A (en) * | 2021-07-16 | 2021-09-24 | 辽宁工程技术大学 | Mining drilling tool integrating main drilling hole and branch hole flexible steel pipe jet flow |
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| CN113431497B (en) * | 2021-07-16 | 2023-12-22 | 辽宁工程技术大学 | Main drilling-supporting hole flexible steel pipe jet integrated mining drilling tool |
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| CN103437705B (en) | 2015-06-03 |
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