CN108868605A - The closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine and method - Google Patents
The closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine and method Download PDFInfo
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- CN108868605A CN108868605A CN201810728314.1A CN201810728314A CN108868605A CN 108868605 A CN108868605 A CN 108868605A CN 201810728314 A CN201810728314 A CN 201810728314A CN 108868605 A CN108868605 A CN 108868605A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
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- Environmental & Geological Engineering (AREA)
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Abstract
A kind of closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine and method, propulsion system include at least drill bit, waterpower auxiliary pressurized device, screw motor and directional tool combination, the first drill string group, the first propeller, cutting bed washer, the second propeller, the second drill string group and the water set gradually just；The efficient application and safe and stable, the efficient propulsion of drill string of bit pressure when the present invention realizes underground coal mine superdeep holes directional drilling, solve the problems, such as that aperture drilling machine propulsive force caused by the contact frictional resistance that drill string is generated by the bending deformation in horizontal orientation hole close over long distances cannot effectively be transferred to drill bit, it solves the problems, such as that frictional resistance caused by depositing when slipping drilling in near-horizontal hole because of landwaste increases and construction risk increases, is of great significance for improving directional drilling depth and deep hole directional drilling efficiency.
Description
Technical field
The present invention relates to the closely horizontal superdeep holes Directional Drillings of underground coal mine drilling technique field more particularly to a kind of underground coal mine
Into drill string power propulsion system and method.
Background technique
The nearly horizontal drilling in China's coal-mine underground is bored during using screw motor sliding directional drilling using aperture at present
Mechanomotive force head propulsion mode generates bending deformation under drill string pressured state in hole and hole wall generation is non-since hole deviation influences
Contact force caused by gravity, and then generate contact frictional resistance.After hole depth reaches a certain level, frictional resistance is accumulated caused by drill stem buckling
Outstanding problem prevents bit pressure from effectively transmitting, generates backing pressure effect, sliding directional drilling efficiency is caused seriously to reduce.It bores and meets ground
Layer is harder, and bit pressure needs are bigger, and aperture feed power just needs to increase accordingly, and drill string compressive deformation is more violent, and the frictional resistance of generation is got over
Greatly, load transfer effect is poorer.Coal mine underground directional drilling mainly uses clear water as deslagging medium, and clear water viscosity is low to take slag
Can not be strong, boring mud is easy deposition and forms cutting bed in near-horizontal hole under slipping drilling technique, and cutting bed not only causes frictional resistance to increase
And it is easy to induce drilling accident.
Increasingly with application of the Technology of Directional Drilling in leting speeper hole, jacking of floor hole, top plate high position hole in recent years
More, requirement of the coal mining enterprise for big depth, high efficiency drilling is higher and higher in addition, and backing pressure effect has become restriction Directional Drilling
The bottleneck problem of hole depth and drilling efficiency.Solving the technical way of deep hole directional drilling backing pressure at present is compound drilling work
Skill, i.e. screw motor broken rock apply certain rotation to drilling rod while drilling, and static friction is become dynamic friction, but there is
Can not continuous high-efficient deflecting drilling, influence drill tool life a series of problems, such as.At present using compound drilling in less complete that rise and fall
Largest hole has been as deep as having arrived 2311m in whole coal seam, in complete, the lesser medium ground that rises and falls largest hole as deep as having arrived 1056m,
Largest hole is as deep as having arrived 1016m in the rock stratum of complex formation.The main reason for restricting bad ground drilling depth is because of backing pressure
Effect leads to not continuously slipping deviating and directing drilling, and drilling track is caused to enter instable layer position and be forced whole hole.
For this purpose, designer of the invention, in view of drawbacks described above, by concentrating on studies and designing, synthesis is engaged in for many years for a long time
The experience and achievement of related industry, researching and designing go out a kind of underground coal mine closely horizontal superdeep holes directional drilling drill string Powered Propulsion system
System and method, to overcome drawbacks described above.
Summary of the invention
The purpose of the present invention is to provide a kind of closely horizontal superdeep holes directional drilling drill string power propulsion systems of underground coal mine
And method, when realizing underground coal mine superdeep holes directional drilling bit pressure it is efficient apply and drill string it is safe and stable, efficiently push away
Into aperture drilling machine promotes caused by solving the contact frictional resistance that drill string is generated by the bending deformation in horizontal orientation hole close over long distances
Power cannot effectively be transferred to the problem of drill bit, when solving slipping drilling in near-horizontal hole because frictional resistance caused by landwaste deposition increases and
The problem of construction risk increases is of great significance for improving directional drilling depth and deep hole directional drilling efficiency.
To solve the above problems, the invention discloses a kind of closely horizontal superdeep holes directional drilling drill string power of underground coal mine to push away
Into system, including at least drill bit, waterpower auxiliary pressurized device, screw motor and the directional tool combination, the first drill string set gradually
Group, the first propeller, cutting bed washer, the second propeller, the second drill string group and water are just, it is characterised in that：
The waterpower auxiliary pressurized device includes shell, first piston, spline shaft, end cap and the first lower contact, described
The left side of shell is equipped with the interconnecting piece for being connected to screw motor, and right side inner cavity is slided for first piston to be arranged, and described first is living
The center of plug is equipped with the throttle orifice of perforation, to generate pressure difference and then the first piston made to generate axial thrust, the shell
Right side inner cavity and the right side of first piston are equipped with spline shaft, and the spline shaft is equipped with outer involute spline, described
Shell is equipped with the interior involute spline that cooperate with outer involute spline, and the right side of the shell equipped with end cap with by spline drived
Axis is fixed in shell, and by screwed connection, first lower contact connects for the right side of the spline shaft 3 and the first lower contact
It is connected to drill bit.
Wherein：First propeller and the second propeller structure are identical, include upper housing, second piston, anti-lost spiral shell
Female, lower case and the second lower contact, the upper housing and lower case are interconnected so as to form the internal channel of perforation, and described second is living
Plug is slideably positioned in upper housing, and it is axial to generate pressure difference and then generate the second piston that center is again provided with throttle orifice
Thrust, the right side of the lower case are equipped with square hole, and second lower contact is equipped with four square bars of perforation square hole, the lower casing
The middle part of body is equipped with interior step, and the anti-lost nut is located at the position on the left of interior step in second lower contact by screwed connection
It sets.
Wherein：The interior step is equipped with the groove accommodated for sealing ring, prevents boring mud from entering internal effect to play.
Wherein：The cutting bed washer includes top connection, screw shaft, rotary sleeve, rubber rotor and third lower contact,
The rotary sleeve is set to the outer rim of screw shaft, and the front end of the screw shaft is connected to third lower contact, and the screw shaft
Outer rim be equipped with the multi-head spiral protrusion of certain lead, the rotary sleeve inner wall has rubber rotor, the screw shaft and rubber
Rotor form screw drive pair, by a part of pressure energy of fluid from top drilling tool be converted into the rubber rotor with it is described
The rotation function of rotary sleeve.
Wherein：The outer surface of the rotary sleeve processes helicla flute, and the helicla flute can be stirred in hole when rotated and be bored
Slag promotes it to be easily discharged out of the hole, and prevents or Cutting Disposal.
Wherein：The first seal capsule and the second sealant are equipped between the both ends inner edge of the rotary sleeve and screw shaft
Capsule.
Wherein：The diameter of the rotary sleeve 44 is 2~4mm bigger than the outer diameter of the top connection and third lower contact.
Wherein：It is stifled that the position of corresponding first seal capsule of the rotary sleeve and the second seal capsule is additionally provided with unidirectional oil.
A kind of closely horizontal superdeep holes directional drilling drill string Powered Propulsion method of underground coal mine is also disclosed, by as described above
Underground coal mine closely horizontal superdeep holes directional drilling drill string power propulsion system realize that this method comprises the following steps：
Step 1: aperture feed power cannot be effectively transferred to when drilling is constructed using general Technology of Directional Drilling to deep hole section
Until drill bit, pull out of hole；
Step 2: determining bit pressure size according to the formation lithology bored, and then select suitable waterpower auxiliary pressurized device；
Step 3: true according to the propulsive force size of drill string and stratum coefficient of friction and the first propeller and the second propeller
The length of fixed first drill string group and the second drill string group；
Step 4: being bored under the installation closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine；
Step 5: slow turn on pump, small displacement waits aperture to return water, returns and is transferred to best row according to parameters such as required bit pressures after water
Amount is slowly pressurizeed by drilling machine and rear portion drill string is promoted to move into hole, and the moment pays close attention to mud pump pressure, if bright in a certain range
The aobvious a certain group of drill string of explanation that reduce is not kept pace with the displacement of front drill string, continues growing aperture feeding rate to be optimal drilling speed；
Step 6: plus drilling rod repeat step 5, when rear portion drilling rod total length when reaching single group drill string length installation one push away
Continue to creep into device；
Step 7: mentioning brill after reaching design hole depth.
By above structure it is found that the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine of the invention
And method has the following effects that：
1, the safe and efficient application that the closely horizontal superdeep holes drilling bit pressure of underground coal mine may be implemented, improves deep well drilling efficiency
And drilling depth；
2, the nearly horizontal box-like propulsion of jumping chisel column sectional power packages is realized, propulsive efficiency is improved；
3, the problems such as landwaste deposition bring frictional resistance increases, drilling accident risk is high is effectively solved；
4, the feed power that aperture is applied by drilling machine is greatly reduced, alleviates drill string force state in hole, improves
The safety of drilling tool in hole.
Detailed content of the invention can be obtained by aftermentioned explanation and institute's attached drawing.
Detailed description of the invention
Fig. 1 shows that the structure of the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine of the invention is shown
It is intended to.
Fig. 2 shows the structural schematic diagram of waterpower auxiliary pressurized device in the present invention.
Fig. 3 shows the structural schematic diagram of propeller in the present invention.
Fig. 3 A show A-A in Fig. 3 to cross-sectional view.
Fig. 4 shows the structural schematic diagram of cutting bed washer in the present invention.
Appended drawing reference：
1- drill bit；2- waterpower auxiliary pressurized device；3- screw motor；The combination of 4- directional tool；5- the first drill string group；6- first
Propeller；7- cutting bed washer；The second propeller of 8-；9- the second drill string group；10- water is just；21- shell；22- first piston；
23- spline shaft；24- end cap；The first lower contact of 25-；31- upper housing；32- second piston；The anti-lost nut of 33-；34- sealing
Circle；35- lower case；The second lower contact of 36-；41- top connection；42- screw shaft；The first seal capsule of 43-；44- rotary sleeve；
45- rubber rotor；The second seal capsule of 46-；The unidirectional oil of 47- is stifled；48- third lower contact.
Specific embodiment
Referring to Fig. 1 and 2, it is shown that the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine of the invention
And method.
The closely horizontal superdeep holes directional drilling drill string power propulsion system of the underground coal mine include the drill bit 1 set gradually,
Waterpower auxiliary pressurized device 2, screw motor 3, directional tool combine the 4, first drill string group 5, the first propeller 6, cutting bed washer
7, the second propeller 8, the second drill string group 9 and water just 10, the waterpower auxiliary pressurized device 2 be mounted on drill bit 1 and screw motor 3 it
Between, to provide bit pressure for drill bit 1 and transmit torque.
Preferably, referring to Fig. 2, the waterpower auxiliary pressurized device 2 may include shell 21, first piston 22, spline drived
Axis 23, end cap 24 and the first lower contact 25, the left side of the shell 21 are equipped with the interconnecting piece for being connected to screw motor 3, in right side
Chamber is slided for first piston 22 to be arranged, can transmit the axial force from rear portion drill string group, the right side inner cavity of the shell 21
It is adapted with first piston 22, and the center of the first piston 22 is equipped with the throttle orifice of perforation, to generate pressure difference and then make institute
It states first piston and generates axial thrust, wherein orifice diameter bit pressure according to needed for drilling strata of the first piston 22
Mud pumpage is chosen in size and real work, and the right side inner cavity of the shell 21 and the right side of first piston are equipped with
Spline shaft 23, the spline shaft 23 are equipped with outer involute spline, and the shell 21 is equipped with matches with outer involute spline
Close interior involute spline, and the right side of the shell 21 be equipped with end cap 24 spline shaft 23 to be fixed in shell 21,
With the first lower contact 25 by screwed connection, first lower contact 25 is connected to drill bit on the right side of the spline shaft 23
1, the spline shaft 23 can be passed axial thrust that the piston generates, rear portion drill string by the shell 21 as a result,
The bit pressure passed, screw motor 3 pass to the drill bit 1 by the torque that the shell 21 transmits to realize drilling；Higher
Under speed conditions, involute spline transmission had not only been able to achieve axial rotation but also had been able to achieve axial movement；
Wherein：First lower contact 25 is with drill bit 1 by screwed connection to transmit bit pressure and torque.
Wherein：The end cap 24 plays anti-lost function.
Working principle in specifically used is：Water from 3 inner cavity of screw motor passes through the 21 inner hole stream of shell
It is flow to right side to 22 left side of first piston, and by 22 throttle orifice of first piston, due to the throttle effect of throttle orifice,
The 22 left side hydraulic pressure of first piston is higher than right side, forms axial thrust by fluid pressure difference；The first piston 22 generates
Axial thrust act on the left side of the spline shaft 23, the spline shaft 23 passes through first lower contact 25 will
Axial thrust passes to the drill bit 1, if the axial thrust that the first piston 21 generates meets the drilling of drill bit 1 needs
It is crept into, if cannot meet the needs, rear portion drill string applies additional axial direction to the spline shaft 23 by the shell 21
Thrust；The torque that the screw motor 3 generates is transmitted by the shell 21, the spline shaft 23, the first lower contact 25
To the drill bit 1.
Referring to Fig. 1, first propeller 6 and the second propeller 8 are mounted among two drill string groups, described to realize
The progradation of 8 front drill string of first propeller 6 and the second propeller, and torque from drilling machine and pulling force can be transmitted with reality
Tool-face, compound drilling are now adjusted, rises and pulls out the functions such as drilling tool.
Preferably, referring to Fig. 3, first propeller 6 is identical with 8 structure of the second propeller, include upper housing 31,
Second piston 32, anti-lost nut 33, lower case 35 and the second lower contact 36.
Wherein：The upper housing 31 and lower case 35 are interconnected so as to form the internal channel of perforation, and the upper housing 31
Inner cavity right end have pressure transmission step, to transmit the axial force from rear portion drill string group.
Wherein：The second piston 32 is slideably positioned in upper housing 31, and center is again provided with throttle orifice to generate pressure
Difference makes the second piston generate axial thrust in turn.
Wherein：Referring to Fig. 3 A, the right side of the lower case 35 is equipped with square hole, and second lower contact 36 is equipped with perforation four
Four square bars of square hole, the lower case 35 are realized by the cooperation of the square hole and four square bars with second lower contact 36 and are passed
The middle part of the effect of torque delivery, the lower case 35 is equipped with interior step, and to realize axial pressure transmission function, the anti-lost nut 33 is logical
It crosses screw thread and is connected to the position (as shown in Figure 3) that second lower contact 36 is located on the left of interior step, to play positioning second
The position of lower contact 36 and the effect for transmitting pulling force.
Wherein：The interior step is equipped with the groove accommodated for sealing ring 34, prevents boring mud from entering internal effect to play.
Working principle in specifically used is：Water from the rear portion drill string group inner cavity passes through 31 inner hole of upper housing
It is flow to the left side of second piston 32, and 32 throttle orifices Jing Guo the second piston flow to right side, due to the section of throttle orifice
Effect is flowed, the 32 left side hydraulic pressure of second piston is higher than right side, forms axial thrust by fluid pressure difference；The second piston
32 axial thrusts generated act on the left side of second lower contact 36, and second lower contact 36 passes to axial thrust
Front meets normal drilling if a drill string group promotes needs if the axial thrust that the second piston 31 generates, if cannot expire
Foot needs, and rear portion drill string group applies additional axial thrust to the lower contact by the upper housing 31；The quantity root of propeller
Depending on hole depth and single group drill string length, but overall presure drop is no more than a certain range, to be the screw motor 3, described
Waterpower auxiliary pressurized device and annular space deslagging provide pressure window.
Referring to Fig. 3, the cutting bed washer 7 includes top connection 41, screw shaft 42, rotary sleeve 44, rubber rotor 45
With third lower contact 48.
Wherein, the top connection 41 is connected to the left side of screw shaft 42 and provides the connection with the first propeller 6, the rotation
Turn the outer rim that housing 44 is set to screw shaft 42, the front end of the screw shaft 42 is connected to third lower contact 48, and the screw rod
The outer rim of axis 42 is equipped with the multi-head spiral protrusion of certain lead, and 44 inner wall of rotary sleeve is machined with rubber by pouring type
Rotor 45, the screw shaft 42 forms screw drive pair with rubber rotor 45, by a part of pressure of fluid from top drilling tool
The rotation function of the rubber rotor 45 and the rotary sleeve 44 can be converted into.
Wherein, the outer surface of the rotary sleeve 44 processes helicla flute, and the helicla flute can stir in hole when rotated
Boring mud promotes it to be easily discharged out of the hole, and prevents or Cutting Disposal.
Wherein, it is close that the first seal capsule 43 and second is equipped between the both ends inner edge and screw shaft 42 of the rotary sleeve 44
Sealing capsule 46, to play the role of sealing overcurrent fluid, pourer is can be used in the first seal capsule 43 and the second seal capsule 46
Skill processing is fixed on 44 inner wall of rotary sleeve.
Wherein, the diameter of the rotary sleeve 44 is 2~4mm bigger than the outer diameter of the top connection and third lower contact.
Wherein, the position of corresponding first seal capsule 43 of the rotary sleeve 44 and the second seal capsule 46 is additionally provided with unidirectionally
Oil stifled 47.
Wherein, in range of flow 200L/min~460L/min, the cutting bed washer consumption hydraulic pressure is not more than
0.3MPa。
The invention further relates to a kind of closely horizontal superdeep holes directional drilling drill string Powered Propulsion methods of underground coal mine, by above-mentioned
Underground coal mine closely horizontal superdeep holes directional drilling drill string power propulsion system realize that this method comprises the following steps：
Step 1: aperture feed power cannot be effectively transferred to when drilling is constructed using general Technology of Directional Drilling to deep hole section
Until drill bit, pull out of hole；
Step 2: determining bit pressure size according to the formation lithology bored, and then select suitable waterpower auxiliary pressurized device；
Step 3: true according to the propulsive force size of drill string and stratum coefficient of friction and the first propeller and the second propeller
The length of fixed first drill string group and the second drill string group；
Step 4: being bored under the installation closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine；
Step 5: slow turn on pump, small displacement waits aperture to return water, returns and is transferred to best row according to parameters such as required bit pressures after water
Amount is slowly pressurizeed by drilling machine and rear portion drill string is promoted to move into hole, and the moment pays close attention to mud pump pressure, if bright in a certain range
The aobvious a certain group of drill string of explanation that reduce is not kept pace with the displacement of front drill string, continues growing aperture feeding rate to be optimal drilling speed；
Step 6: plus drilling rod repeat step 5, when rear portion drilling rod total length when reaching single group drill string length installation one push away
Continue to creep into device；
Step 7: mentioning brill after reaching design hole depth.
By it is above-mentioned it is found that the advantage of the invention is that：
1, the safe and efficient application that underground coal mine orientation deep well drilling bit pressure may be implemented solves or reduces backing pressure effect,
Improve deep hole directional drilling efficiency and drilling depth；
2, the nearly horizontal box-like propulsion of jumping chisel column sectional power packages is realized, propulsive efficiency is improved；
3, the problems such as landwaste deposition bring frictional resistance increases, drilling accident risk is high is effectively solved；
4, the feed power that aperture is applied by drilling machine is greatly reduced, alleviates Tubing Buckling in hole and deforms, improve
The safety of drilling tool in hole.
Wherein, the waterpower auxiliary pressurized device can produce axial thrust within the scope of flow 200L/min~460L/min
2kN~10kN meets bit pressure requirement needed for the following drill bit of outer diameter 133mm is crept into general coal measure strata.
It is readily apparent that above description and record is only illustrated in the disclosure being not intended to be limiting of the invention
Appearance, application or use.Although describing and being described in the accompanying drawings embodiment in embodiment, the present invention is not limited
Be described as by attached drawing example and in embodiment it is now recognized that optimal mode to implement the particular case of the teachings of the present invention
Son, the scope of the present invention will include any embodiment for falling into the description and appended claims of front.
Claims (9)
1. the closely horizontal superdeep holes directional drilling drill string power propulsion system of a kind of underground coal mine, including at least the brill set gradually
Head, waterpower auxiliary pressurized device, screw motor and directional tool combination, the first drill string group, the first propeller, cutting bed washer,
Second propeller, the second drill string group and water are just, it is characterised in that：
The waterpower auxiliary pressurized device includes shell, first piston, spline shaft, end cap and the first lower contact, the shell
Left side be equipped with and be connected to the interconnecting piece of screw motor, right side inner cavity is slided for first piston to be arranged, and the first piston
Center is equipped with the throttle orifice of perforation, to generate pressure difference and then the first piston is made to generate axial thrust, the right side of the shell
Inner cavity and the right side of first piston are equipped with spline shaft, and the spline shaft is equipped with outer involute spline, the shell
Equipped with the interior involute spline cooperated with outer involute spline, and the right side of the shell is equipped with end cap to consolidate spline shaft
Due in shell, by screwed connection, first lower contact is connected to for the right side of the spline shaft 3 and the first lower contact
Drill bit.
2. the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine as described in claim 1, feature exist
In：First propeller and the second propeller structure are identical, include upper housing, second piston, anti-lost nut, lower case and
Second lower contact, the upper housing and lower case are interconnected so as to form the internal channel of perforation, the second piston sliding setting
In in upper housing, center is again provided with throttle orifice to generate pressure difference and then the second piston is made to generate axial thrust, described
The right side of lower case is equipped with square hole, and second lower contact is equipped with four square bars of perforation square hole, the middle part of the lower case
Equipped with interior step, the anti-lost nut is located at the position on the left of interior step in second lower contact by screwed connection.
3. the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine as claimed in claim 2, feature exist
In：The interior step is equipped with the groove accommodated for sealing ring, prevents boring mud from entering internal effect to play.
4. the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine as described in claim 1, feature exist
In：The cutting bed washer includes top connection, screw shaft, rotary sleeve, rubber rotor and third lower contact, outside the rotation
Set is set to the outer rim of screw shaft, and the front end of the screw shaft is connected to third lower contact, and the outer rim of the screw shaft is equipped with
The multi-head spiral protrusion of certain lead, the rotary sleeve inner wall have rubber rotor, and the screw shaft and rubber rotor form spiral shell
A part of pressure energy of fluid from top drilling tool is converted the rubber rotor and the rotary sleeve by bar transmission
Rotation function.
5. the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine as claimed in claim 4, feature exist
In：The outer surface of the rotary sleeve processes helicla flute, and the helicla flute can stir boring mud in hole when rotated and promote its row
Portal outer, prevents or Cutting Disposal.
6. the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine as claimed in claim 4, feature exist
In：The first seal capsule and the second seal capsule are equipped between the both ends inner edge of the rotary sleeve and screw shaft.
7. the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine as claimed in claim 4, feature exist
In：The diameter of the rotary sleeve 44 is 2~4mm bigger than the outer diameter of the top connection and third lower contact.
8. the closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine as claimed in claim 6, feature exist
In：It is stifled that the position of corresponding first seal capsule of the rotary sleeve and the second seal capsule is additionally provided with unidirectional oil.
9. a kind of closely horizontal superdeep holes directional drilling drill string Powered Propulsion method of underground coal mine, by appointing in such as claim 1-8
The closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine described in one realizes that this method comprises the following steps：
Step 1: aperture feed power cannot effectively be transferred to drill bit when drilling is constructed using general Technology of Directional Drilling to deep hole section
Until, it pulls out of hole；
Step 2: determining bit pressure size according to the formation lithology bored, and then select suitable waterpower auxiliary pressurized device；
Step 3: determining the according to the propulsive force size of drill string and stratum coefficient of friction and the first propeller and the second propeller
The length of one drill string group and the second drill string group；
Step 4: being bored under the installation closely horizontal superdeep holes directional drilling drill string power propulsion system of underground coal mine；
Step 5: slow turn on pump, small displacement waits aperture to return water, returns and is transferred to best discharge capacity according to parameters such as required bit pressures after water,
Slowly being pressurizeed by drilling machine promotes rear portion drill string to move into hole, and the moment pays close attention to mud pump pressure, if obvious in a certain range
It reduces a certain group of drill string of explanation and is not kept pace with the displacement of front drill string, continue growing aperture feeding rate to be optimal drilling speed；
Step 6: plus drilling rod repeat step 5, when rear portion, drilling rod total length installs a propeller when reaching single group drill string length
Continue to creep into；
Step 7: mentioning brill after reaching design hole depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810728314.1A CN108868605B (en) | 2018-07-05 | 2018-07-05 | Power propulsion system and method for underground coal mine near-horizontal ultra-deep hole directional drilling drill column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810728314.1A CN108868605B (en) | 2018-07-05 | 2018-07-05 | Power propulsion system and method for underground coal mine near-horizontal ultra-deep hole directional drilling drill column |
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| CN108868605B CN108868605B (en) | 2019-12-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502545A (en) * | 2020-04-07 | 2020-08-07 | 中煤科工集团西安研究院有限公司 | Near-horizontal pressurized directional drilling equipment and method for complex broken stratum under coal mine |
| CN115596346A (en) * | 2022-12-12 | 2023-01-13 | 沧州格锐特钻头有限公司（Cn） | Screw drill with discharge function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111502545A (en) * | 2020-04-07 | 2020-08-07 | 中煤科工集团西安研究院有限公司 | Near-horizontal pressurized directional drilling equipment and method for complex broken stratum under coal mine |
| CN111502545B (en) * | 2020-04-07 | 2022-03-01 | 中煤科工集团西安研究院有限公司 | Near-horizontal pressurized directional drilling equipment and method for complex broken stratum under coal mine |
| CN115596346A (en) * | 2022-12-12 | 2023-01-13 | 沧州格锐特钻头有限公司（Cn） | Screw drill with discharge function |
| CN115596346B (en) * | 2022-12-12 | 2023-03-10 | 沧州格锐特钻头有限公司 | Screw drill with discharge function |
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| Publication number | Publication date |
|---|---|
| CN108868605B (en) | 2019-12-31 |
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