CN104453728A - Hole collapse prevention device and drill bit structure thereof - Google Patents
Hole collapse prevention device and drill bit structure thereof Download PDFInfo
- Publication number
- CN104453728A CN104453728A CN201410654971.8A CN201410654971A CN104453728A CN 104453728 A CN104453728 A CN 104453728A CN 201410654971 A CN201410654971 A CN 201410654971A CN 104453728 A CN104453728 A CN 104453728A
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- China
- Prior art keywords
- protection pipe
- wall protection
- drill bit
- tooth
- bit structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002265 prevention Effects 0.000 title abstract 5
- 238000005553 drilling Methods 0.000 claims abstract description 42
- 239000003245 coal Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000002459 sustained effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a hole collapse prevention device and a drill bit structure of the hole collapse prevention device, and relates to the technical field of engineering machinery. A wall protecting pipe propeller is arranged at the bottom of a wall protecting pipe, the drill bit structure and a drill rod are sleeved with the wall protecting pipe, the drill bit structure comprises a drilling tooth, an expanding tooth, a tool apron, a fixing shaft and a tool handle, the drilling tooth is fixed on the tool apron, the expanding tooth is connected with the tool handle through the fixing shaft, the wall protecting pipe propeller is composed of a positioning clamp, a pressure bearing and a wall protecting pipe propelling disc, the pressure bearing is installed in the middle of the wall protecting pipe propelling disc, the positioning clamp is arranged at the bottom of the wall protecting pipe propelling disc, the pressure bearing is used for eliminating torque generated in the propelling process of the wall protecting pipe, and the wall protecting pipe propelling disc is used for stabilizing the wall protecting pipe so that the wall protecting pipe and the drill rod can be propelled synchronously. The hole collapse prevention device and the drill bit structure of the hole collapse prevention device are especially suitable for drilling construction of three-soft coal seams, and as the wall protecting pipe follows in time in the drilling process and the drill rod is smoothly drawn out after hole drilling is finished, the drilling hole forming rate of the three-soft coal seams is ensured.
Description
Technical field
The present invention relates to a kind of anti-collapse aperture apparatus and drill bit structure thereof, belong to technical field of engineering machinery.
Background technology
In China, " three is soft " thick and super high seam accounts for very large proportion, and reserves number is in 10,000,000,000 tons.The heterogeneous body stratiform tax that " three is soft " coal seam country rock belongs to otherness very large is deposited, show as country rock to be difficult to form bearing structure, the integral sinking that strong country rock is uneven, one side's deformation instability, the opposing party's unstability must be caused, form vicious circle, because the Protodyakonov coefficient in " three is soft " coal seam is very little, coefficient of internal friction, cohesion is all very little, the stress so just making coal seam to bear is very little, after having holed, due to the quadratic distribution of stress, hole wall can not bear the selfweight stress etc. in coal seam above, hole wall can be caused to be sheared or pressure is damaged, causing can not pore-forming.Solving drilling problems is safety in production, the prerequisite of methane drawing.
The threat of Gas Disaster accident strongly limit the raising of coal production scale, production efficiency and economic benefit.Effective control of Gas Disaster is the critical problem ensureing China coal industry sustainable development.
By the present invention, can solve and hole in " three is soft " coal seam, ensure pore-forming, gas extraction problem, can ensure safety in production, and directly promotes the development of national economy.
Summary of the invention
For the problems referred to above, the technical problem to be solved in the present invention is to provide a kind of anti-collapse aperture apparatus and drill bit structure thereof.
Anti-collapse aperture apparatus of the present invention and drill bit structure thereof, it comprises wall protection pipe propeller, wall protection pipe and drill bit structure, and the bottom of wall protection pipe is provided with wall protection pipe propeller, and wall protection pipe is enclosed within drill bit structure and drilling rod is outside.
As preferably, described drill bit structure comprises and creeps into tooth, expansion tooth, tool rest, fixed axis and handle of a knife, and wherein creep into tooth and be fixed on tool rest, expansion tooth is connected with handle of a knife by fixed axis.
As preferably, described wall protection pipe propeller is made up of locator card, pressure bearing and wall protection pipe pushing disc, the middle part of wall protection pipe pushing disc is provided with pressure bearing, locator card is provided with bottom wall protection pipe pushing disc, pressure bearing is for eliminating the moment of torsion produced in wall protection pipe progradation, and wall protection pipe pushing disc is used for stablizing wall protection pipe to be made it synchronously to advance with drilling rod.
As preferably, described wall protection pipe comprises wall protection pipe interface, drawing-off gas hole and wall protection pipe joint, and one end of wall protection pipe is provided with wall protection pipe interface, and the other end of wall protection pipe is provided with wall protection pipe joint, and the pipe shaft of wall protection pipe is evenly equipped with drawing-off gas hole.
As preferably, described tool rest inside is provided with gear structure, and gear structure comprises master gear, linkage gear and fixed axis, and master gear and linkage gear are in transmission connection, and the middle part of linkage gear is fixed with fixed axis.
As preferably, being made up of high strength, antistatic, resistance combustible material of described wall protection pipe.
As preferably, the described width creeping into tooth is more than or equal to the width of described tool rest.
As preferably, the described tooth that creeps into uniformly is welded in tool rest by 120 °, creeps into tooth and is provided with internal tooth, center tooth, external tooth, and described gear piece is not at sustained height, outwards increased successively by described center line of bit, and creep into flank limit and be provided with three side teeth, and along side vertical runs.
As preferably, the root of described each expansion tooth is provided with water hole.
As preferably, described drillstock is that six sides add alignment pin and connect and be convenient to stacks before rig.
Beneficial effect of the present invention: 1, bit diameter described in anti-collapse aperture apparatus of the present invention and drill bit structure thereof is variable, can realize reaming, both ensure that wall protection pipe can advance with drilling rod, can also move back brill smoothly after boring terminates while boring;
2, wall protection pipe described in anti-collapse aperture apparatus of the present invention and drill bit structure thereof can external force in balance pipe, effectively prevents collapse hole, for the discharge of " three is soft " coal-bed gas creates conditions.Wall protection pipe is high strength, antistatic, resistance combustible material is made, safe and reliable, does not affect the follow-up exploitation in coal seam.
3, anti-collapse aperture apparatus of the present invention and drill bit structure thereof are installed convenient, simple and reliable for structure, and economy is strong.
accompanying drawing illustrates:
For ease of illustrating, the present invention is described in detail by following concrete enforcement and accompanying drawing.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the angle of rake structural representation of wall protection pipe of the present invention;
Fig. 3 is that the B-B of Fig. 2 is to sectional structure schematic diagram;
Fig. 4 is the structural representation of wall protection pipe in the present invention;
Fig. 5 is the structural representation of drill bit structure in the present invention;
Fig. 6 is tool rest gear structure inside schematic diagram in the present invention.
1-wall protection pipe propeller; 2-wall protection pipe; 3-drill bit structure; 11-locator card; 12-pressure bearing; 13-wall protection pipe pushing disc; 21-wall protection pipe interface; 22-drawing-off gas hole; 23-wall protection pipe joint; 31-creeps into tooth; 32-expands tooth; 33-tool rest; 34-fixed axis; 35-handle of a knife; 41-master gear; 42-linkage gear; 43-fixed axis.
detailed description of the invention:
As shown in figures 1 to 6, this detailed description of the invention by the following technical solutions: it comprises wall protection pipe propeller 1, wall protection pipe 2 and drill bit structure 3, and the bottom of wall protection pipe 2 is provided with wall protection pipe propeller 1, and wall protection pipe 2 is enclosed within drill bit structure 3 and drilling rod is outside.
As preferably, described drill bit structure 3 comprises and creeps into tooth 31, expansion tooth 32, tool rest 33, fixed axis 34 and handle of a knife 35, and wherein creep into tooth 31 and be fixed on tool rest 33, expansion tooth 32 is connected with handle of a knife 35 by fixed axis 34.
As preferably, described wall protection pipe propeller 1 is made up of locator card 11, pressure bearing 12 and wall protection pipe pushing disc 13, the middle part of wall protection pipe pushing disc 13 is provided with pressure bearing 12, locator card 11 is provided with bottom wall protection pipe pushing disc 13, pressure bearing 12 is for eliminating the moment of torsion produced in wall protection pipe progradation, and wall protection pipe pushing disc 13 makes it synchronously to advance with drilling rod for stable wall protection pipe.
As preferably, described wall protection pipe 2 comprises wall protection pipe interface 21, drawing-off gas hole 22 and wall protection pipe joint 23, one end of wall protection pipe 2 is provided with wall protection pipe interface 21, and the other end of wall protection pipe 2 is provided with wall protection pipe joint 23, and the pipe shaft of wall protection pipe 2 is evenly equipped with drawing-off gas hole 22.
As preferably, described tool rest 33 inside is provided with gear structure, and gear structure comprises master gear 41, linkage gear 42 and fixed axis 43, and master gear 41 and linkage gear 42 are in transmission connection, and the middle part of linkage gear 42 is fixed with fixed axis 43.
As preferably, 2 of described wall protection pipe is made up of high strength, antistatic, resistance combustible material.
As preferably, the described width creeping into tooth 31 is more than or equal to the width of described tool rest 33.
As preferably, the described tooth 31 that creeps into uniformly is welded in tool rest 33 by 120 °, creeps into tooth 31 and is provided with internal tooth, center tooth, external tooth, and described gear piece is not at sustained height, outwards increased successively by described drill bit 3 center line, and creep into tooth 31 side and be provided with three side teeth, and along side vertical runs.
As preferably, the root of described each expansion tooth 32 is provided with water hole.
As preferably, described drillstock 35 is that six sides add alignment pin and connect and be convenient to stacks before rig.
This is concrete implement described in anti-collapse aperture apparatus and the drill bit structure course of work as follows: because most rig is all rear stacks, wall protection pipe 2 cannot be installed, in order to ensure that wall protection pipe 2 and drill bit 3 synchronously advance, prevent from, in drilling process, collapse hole occurs, need to connect wall protection pipe 2 while stacks before rig, Gu rig is amplified to about 1.8m in work plane spacing, drilling rod connects to be switched through from the silk commonly used and becomes six sides and add alignment pin and connect so that jointed rod before rig, first drill bit 3 is connected with drilling rod, upper drilling rod steady pin, starts rig and send water drilling to enter, until first drilling rod pierces coal seam smoothly after arriving assigned address by rig, drilling rod in coal seam is unloaded from rig, after rig connects new drilling rod, get wall protection pipe propeller 1, the set screw unclamping propeller locator card 11 is enclosed within drilling rod, after wall protection pipe pushing disc 13 is moved on to suitable position, fastening set screw, make itself and drilling rod coaxial positioning, so that wall protection pipe 2 and drilling rod synchronously advance, after wall protection pipe 2 and wall protection pipe pushing disc 13 are packaged, new stacks is connected with drilling rod in coal seam, start rig to continue to creep into, wall protection pipe 2 synchronously can advance together with drilling rod, and it is to guard aperture effect, it should be noted that, before connection need close creep into compressed air and water after carry out, along with drilling process, repeat above installation action.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and manual just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (11)
1. an anti-collapse aperture apparatus and drill bit structure thereof, it is characterized in that: it comprises wall protection pipe propeller (1), wall protection pipe (2) and drill bit structure (3), the bottom of wall protection pipe (2) is provided with wall protection pipe propeller (1), and wall protection pipe (2) is enclosed within drill bit structure (3) and drilling rod is outside.
2. the anti-collapse aperture apparatus of one according to claim 1 and drill bit structure thereof, it is characterized in that: described drill bit structure (3) comprises and creeps into tooth (31), expansion tooth (32), tool rest (33), fixed axis (34) and handle of a knife (35), wherein creeping into tooth (31) is fixed on tool rest (33), and expansion tooth (32) is connected with handle of a knife (35) by fixed axis (34).
3. the anti-collapse aperture apparatus of one according to claim 1 and drill bit structure thereof, it is characterized in that: described wall protection pipe propeller (1) is by locator card (11), pressure bearing (12) and wall protection pipe pushing disc (13) composition, the middle part of wall protection pipe pushing disc (13) is provided with pressure bearing (12), the bottom of wall protection pipe pushing disc (13) is provided with locator card (11), pressure bearing (12) is for eliminating the moment of torsion produced in wall protection pipe progradation, wall protection pipe pushing disc (13) makes it synchronously to advance with drilling rod for stable wall protection pipe.
4. the anti-collapse aperture apparatus of one according to claim 1 and drill bit structure thereof, it is characterized in that: described wall protection pipe (2) comprises wall protection pipe interface (21), drawing-off gas hole (22) and wall protection pipe joint (23), one end of wall protection pipe (2) is provided with wall protection pipe interface (21), the other end of wall protection pipe (2) is provided with wall protection pipe joint (23), and the pipe shaft of wall protection pipe (2) is evenly equipped with drawing-off gas hole (22).
5. the anti-collapse aperture apparatus of one according to claim 1 and drill bit structure thereof, it is characterized in that: described tool rest (33) inside is provided with gear structure, gear structure comprises master gear (41), linkage gear (42) and fixed axis (43), master gear (41) and linkage gear (42) are in transmission connection, and the middle part of linkage gear (42) is fixed with fixed axis (43).
6. the anti-collapse aperture apparatus of one according to claim 1 and drill bit structure thereof, is characterized in that: described wall protection pipe (2) is made up of high strength, antistatic, resistance combustible material.
7. the anti-collapse aperture apparatus of one according to claim 1 and drill bit structure thereof, is characterized in that: the described width creeping into tooth (31) is more than or equal to the width of described tool rest (33).
8. the anti-collapse aperture apparatus of one according to claim 1 and drill bit structure thereof, it is characterized in that: the described tooth (31) that creeps into uniformly is welded in tool rest (33) by 120 °, creep into tooth (31) and be provided with internal tooth, center tooth, external tooth, and described gear piece is not at sustained height, outwards increased successively by described drill bit (3) center line, and creep into tooth (31) side and be provided with three side teeth, and along side vertical runs.
9. the anti-collapse aperture apparatus of one according to claim 1 and drill bit structure thereof, is characterized in that: the root of described each expansion tooth (32) is provided with water hole.
10. the anti-collapse aperture apparatus of one according to claim 1 and drill bit structure thereof, is characterized in that: described drillstock (35) is that six sides add alignment pin and connect and be convenient to stacks before rig.
The anti-collapse aperture apparatus of 11. one according to claim 1 and drill bit structure thereof, it is characterized in that: its course of work principle is: because most rig is all rear stacks, wall protection pipe (2) cannot be installed, in order to ensure that wall protection pipe (2) and drill bit (3) synchronously advance, prevent from, in drilling process, collapse hole occurs, need before rig, while stacks, connect wall protection pipe (2), Gu rig is amplified to about 1.8m in work plane spacing, drilling rod connects to be switched through from the silk commonly used and becomes six sides and add alignment pin and connect so that jointed rod before rig, drill bit (3) is first connected with drilling rod, upper drilling rod steady pin, starts rig and send water drilling to enter, until first drilling rod pierces coal seam smoothly after arriving assigned address by rig, drilling rod in coal seam is unloaded from rig, after rig connects new drilling rod, get wall protection pipe propeller (1), the set screw unclamping propeller locator card (11) is enclosed within drilling rod, after wall protection pipe pushing disc (13) is moved on to suitable position, fastening set screw, make itself and drilling rod coaxial positioning, so that wall protection pipe (2) and drilling rod synchronously advance, after wall protection pipe (2) and wall protection pipe pushing disc (13) are packaged, new stacks is connected with drilling rod in coal seam, start rig to continue to creep into, wall protection pipe (2) synchronously can advance together with drilling rod, and it is to guard aperture effect, it should be noted that, before connection need close creep into compressed air and water after carry out, along with drilling process, repeat above installation action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410654971.8A CN104453728B (en) | 2014-11-18 | 2014-11-18 | A kind of anti-collapse aperture apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410654971.8A CN104453728B (en) | 2014-11-18 | 2014-11-18 | A kind of anti-collapse aperture apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104453728A true CN104453728A (en) | 2015-03-25 |
| CN104453728B CN104453728B (en) | 2017-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410654971.8A Expired - Fee Related CN104453728B (en) | 2014-11-18 | 2014-11-18 | A kind of anti-collapse aperture apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN104453728B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168117A (en) * | 2015-09-30 | 2016-11-30 | 洛阳武轩重工机械有限公司 | A kind of plate retaining wall follow-up reaming bit |
| CN108005581A (en) * | 2017-12-15 | 2018-05-08 | 河南理工大学 | The thick support top coal drift roof bolting hole hole-forming device of soft broken and its application method |
| CN108179978A (en) * | 2018-01-10 | 2018-06-19 | 河南理工大学 | Strengthen cherry coal rock intensity drilling method and drilling tool |
| CN108590516A (en) * | 2018-05-29 | 2018-09-28 | 佛山拾念科技有限公司 | A kind of geological prospecting device and its application method |
| CN109594926A (en) * | 2019-01-15 | 2019-04-09 | 高九华 | Roll-in cut drill |
| CN109653788A (en) * | 2019-03-05 | 2019-04-19 | 安徽理工大学 | A kind of gas drainage pipe suitable for the drilling of easy slump uplink |
| CN110080677A (en) * | 2019-04-07 | 2019-08-02 | 江山显进机电科技服务有限公司 | A kind of well-digging method |
| CN110513048A (en) * | 2019-09-05 | 2019-11-29 | 冀凯河北机电科技有限公司 | A kind of automatic reducing borehole-enlarging drilling header structure |
| CN114151014A (en) * | 2021-11-30 | 2022-03-08 | 武穴市明锐机械股份有限公司 | Full-automatic easy-to-draw-in type pipe-following reaming drill bit |
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| US5524708A (en) * | 1994-02-28 | 1996-06-11 | Isaacs; Jonathan W. | Non-metallic oil well tubing system |
| CN103726869A (en) * | 2014-01-24 | 2014-04-16 | 河南理工大学 | Drilling with casing method for gas extraction hole of soft broken coal seam |
| CN103726791A (en) * | 2014-01-24 | 2014-04-16 | 河南理工大学 | Pipe-following drilling reaming device for gas extraction holes in soft broken coal bed |
| CN203669921U (en) * | 2014-01-24 | 2014-06-25 | 河南理工大学 | Soft and broken coal seam gas extraction hole drilling with casing device |
| CN104100212A (en) * | 2013-04-15 | 2014-10-15 | 上海海隆石油钻具有限公司 | Anti-collapsing and anti-striking protection drilling rod |
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- 2014-11-18 CN CN201410654971.8A patent/CN104453728B/en not_active Expired - Fee Related
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| US5524708A (en) * | 1994-02-28 | 1996-06-11 | Isaacs; Jonathan W. | Non-metallic oil well tubing system |
| CN104100212A (en) * | 2013-04-15 | 2014-10-15 | 上海海隆石油钻具有限公司 | Anti-collapsing and anti-striking protection drilling rod |
| CN103726869A (en) * | 2014-01-24 | 2014-04-16 | 河南理工大学 | Drilling with casing method for gas extraction hole of soft broken coal seam |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168117A (en) * | 2015-09-30 | 2016-11-30 | 洛阳武轩重工机械有限公司 | A kind of plate retaining wall follow-up reaming bit |
| CN108005581A (en) * | 2017-12-15 | 2018-05-08 | 河南理工大学 | The thick support top coal drift roof bolting hole hole-forming device of soft broken and its application method |
| CN108005581B (en) * | 2017-12-15 | 2023-10-27 | 河南理工大学 | Device for forming anchoring hole in top plate of soft broken thick-roof coal roadway and using method of device |
| CN108179978A (en) * | 2018-01-10 | 2018-06-19 | 河南理工大学 | Strengthen cherry coal rock intensity drilling method and drilling tool |
| CN108590516A (en) * | 2018-05-29 | 2018-09-28 | 佛山拾念科技有限公司 | A kind of geological prospecting device and its application method |
| CN109594926A (en) * | 2019-01-15 | 2019-04-09 | 高九华 | Roll-in cut drill |
| CN109653788A (en) * | 2019-03-05 | 2019-04-19 | 安徽理工大学 | A kind of gas drainage pipe suitable for the drilling of easy slump uplink |
| CN109653788B (en) * | 2019-03-05 | 2023-08-29 | 安徽理工大学 | Gas extraction pipe suitable for easy-collapse up-hole drilling |
| CN110080677A (en) * | 2019-04-07 | 2019-08-02 | 江山显进机电科技服务有限公司 | A kind of well-digging method |
| CN110080677B (en) * | 2019-04-07 | 2020-10-30 | 绍兴迪艾仕机械设计有限公司 | Well drilling method |
| CN110513048A (en) * | 2019-09-05 | 2019-11-29 | 冀凯河北机电科技有限公司 | A kind of automatic reducing borehole-enlarging drilling header structure |
| CN114151014A (en) * | 2021-11-30 | 2022-03-08 | 武穴市明锐机械股份有限公司 | Full-automatic easy-to-draw-in type pipe-following reaming drill bit |
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|---|---|
| CN104453728B (en) | 2017-03-08 |
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