CN110630180A - Coal seam drilling is protected directly and is prevented oblique device - Google Patents
Coal seam drilling is protected directly and is prevented oblique device Download PDFInfo
- Publication number
- CN110630180A CN110630180A CN201911002810.XA CN201911002810A CN110630180A CN 110630180 A CN110630180 A CN 110630180A CN 201911002810 A CN201911002810 A CN 201911002810A CN 110630180 A CN110630180 A CN 110630180A
- Authority
- CN
- China
- Prior art keywords
- straight
- rod
- keeping
- inclination
- drill bit
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 49
- 239000003245 coal Substances 0.000 title claims abstract description 17
- 230000002441 reversible effect Effects 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000002893 slag Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 241001074085 Scophthalmus aquosus Species 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002699 waste material Substances 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
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/10—Correction of deflected boreholes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a coal seam drilling straight-keeping and inclination-preventing device which comprises a drill bit, a straight-keeping and inclination-preventing rod, a reverse drill bit and a triangular connecting rod, wherein the straight-keeping and inclination-preventing rod is connected with the drill bit through a rod joint arranged at the head of the straight-keeping and inclination-preventing rod, and is connected with the triangular connecting rod through a threaded hole arranged at the tail of the straight-keeping and inclination-preventing rod, and the reverse drill bit is arranged on the straight-keeping and inclination-preventing rod and is positioned at the connecting end of the straight-. The invention has high reliability, is beneficial to improving the drilling technology, improving the pore-forming quality and improving the qualified rate of the drilled hole, thereby promoting the reduction of the offset distance of the drilled hole, being beneficial to reducing the blank zone of gas extraction, improving the gas extraction effect and ensuring the safe production of a mine.
Description
Technical Field
The invention belongs to the technical field of coal mine safety, and particularly relates to a coal seam drilling straight-keeping and inclination-preventing device.
Background
Along with the gradual deepening of the coal seam mining depth in China and the higher and higher requirements of a mine on safe production, the development of the gas extraction technology in China enters the low-permeability coal seam enhanced extraction stage. The coal seam gas extraction needs extraction drill holes, the gas extraction drill holes are the fundamental guarantee for realizing the gas extraction, and the quality of the drill holes plays a key role in the gas extraction effect. The technology for keeping the straight and preventing the inclination of the extraction drill hole is one of the key technologies for extracting the coal seam gas, but the gas extraction drill hole generally has the problem of inclination. In the process of drilling construction, the drilled holes are greatly influenced by technological parameters such as azimuth angles, inclination angles, hardness changes and inclination changes of coal (rock) layers, feeding force, rotating speed, pump amount and the like in the construction process, so that the left and right deviation and the up and down deviation of the drilled holes are large, and even some drilled holes are directly waste holes due to large deviation. In case the drilling takes place the skew, can make partial drilling interval in the coal seam too big, form the blank area of adopting, can't reach the mesh that reduces gas outburst elimination to influence the effect of adopting of gas. Therefore, the problem of deviation of the drill hole is one of the biggest problems influencing the gas extraction effect.
Although research is carried out at home and abroad on the problem of drilling deviation, some correction methods are also provided, so far, a straight-keeping and inclination-preventing technology and device which are high in precision, strong in adaptability and easy to use and use are lacked in a coal mine. In order to solve the problem, a coal seam drilling straight-keeping and inclination-preventing device is needed to be designed, so that the offset distance is reduced, a blank zone of gas extraction is reduced, the gas extraction effect is improved, and the safe production of a mine is ensured.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a coal seam drilling straight-keeping and inclination-preventing device which can ensure the construction quality of an extraction drill hole in the drilling process, solve the ubiquitous problem of drill hole deflection and comprehensively improve the gas extraction effect.
The technical scheme adopted by the invention is as follows: the utility model provides a coal seam drilling is protected and is straightened anti-slope device, includes the drill bit, is protected straight to prevent down tube, reverse bit and three arris and connect the pole, it is connected with the drill bit to protect straight to prevent down tube through the pole joint that its head set up, connects with the three arris through the screw hole that its afterbody set up and connects the pole, reverse bit sets up on protecting straight to prevent down tube and is located the link of protecting straight to prevent down tube and three arris and connect the pole.
Preferably, the straight-keeping anti-skew rod is provided with three spiral grooves, the width of each spiral groove is 20mm, the depth of each spiral groove is 12mm, the lead of each spiral groove is 192mm, and the spiral angle alpha is 12.8 degrees. The device has dual modes of fluid slag discharge and mechanical slag discharge through the three spiral grooves, the straight-keeping inclined-bar slag discharge prevention mode takes the fluid slag discharge as a main mode and takes the mechanical slag discharge as an auxiliary mode, and the characteristic of the cooperative slag discharge of the fluid slag discharge and the mechanical slag discharge is fully embodied. The mechanical deslagging power is from the feeding force of the drilling machine in the drilling process, and the drill cuttings in the three spiral grooves on the surface of the straight-preventing inclined rod are kept in a flowing state, so that the heat generated on the surface can be taken away in time, and the reliability of the device is improved.
Preferably, three vertical grooves with the width of 20mm and the depth of 12mm are milled in the circumferential direction of every 120 degrees of the straight-keeping anti-tilting rod, so that the frequency of stirring drill cuttings and the slag discharging efficiency of the device are improved.
Preferably, the body of rod of keeping straight and preventing the down tube adopts 27SiMn steel pipe material, the external diameter of the body of rod is 94mm, internal diameter 48mm, wall thickness 23mm, and length is 800mm, and torsional strength T is 21927.4 ~ 26281.4 N.m. the body of rod adopts 27SiMn steel pipe material, has higher intensity and wearability, is favorable to improving the reliability of device.
Preferably, the rod joint arranged at the head of the straight-keeping anti-sway rod adopts a 42CrMo steel pipe, the static torsion strength T of the steel pipe is 7844.7 ~ 9413.6 N.m, the strength of the 42CrMo steel pipe is high, and the reliability of the device is ensured.
Preferably, the reverse drill comprises three alloy sheets which are uniformly distributed along the circumferential direction of the straight-keeping anti-tilting rod. When the straight-keeping drilling is adopted, because the full hole drilling is adopted, the situation that the drilling tool is difficult to withdraw can occur in the process of withdrawing the drilling tool, and particularly in the hole section with more collapsed hole drilling cuttings, the diameter of the device is the same as the diameter of the drilled hole, so that the phenomenon of drill jamming is easily formed, and the straight-keeping anti-inclined rod cannot be withdrawn and fall into the hole. Through setting up reverse bit, when rotatory moving back the brill, realize reverse drilling, both made things convenient for and moved back the brill, not by a relatively large margin changes the device again, realizes moving back the brill smoothly.
Preferably, the length of the triangular connecting rod is 500 mm. When the hole is drilled normally, the three-edge connecting rod is connected with the drill bit, and after the drill is drilled for 2m, the straight-keeping anti-sway rod is connected between the three-edge connecting rod and the drill bit, so that straight-keeping drilling is realized, and the service life of the straight-keeping anti-sway rod is prolonged.
The invention also comprises other components which can ensure that the drilling hole is kept straight and the anti-inclination device is normally used, and the components are conventional technical means in the field. In addition, the undefined devices or components of the present invention are all those conventionally used in the art.
The working principle of the invention is as follows: through the technical principle of the area of contact of increase drill bit department and pore wall, at the drilling in-process, because traditional drilling rod can revolve around drilling axis and slide along the pore wall, produce the revolution promptly, reaming phenomenon appears easily, and after installing the straight down-proof diagonal bar of guarantor additional, because its diameter is the same with drilling, can restrain the whipping of drill bit on the one hand, even reaming phenomenon appears, the straight down-proof diagonal bar is close to the drill bit and is connected, can utilize the device and the mutual action of drilling pore wall to right the direction of advancing of drill bit, realize the straight drilling of guarantor.
The invention has the advantages of simple structure and high reliability, is beneficial to improving the drilling technology, improving the pore-forming quality and improving the qualified rate of the drilled hole, thereby promoting the reduction of the offset distance of the drilled hole, being beneficial to reducing the blank zone of gas extraction, improving the gas extraction effect and ensuring the safe production of a mine.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the structure of the straight-keeping anti-sway rod of the invention.
In the figure: 1. the drilling bit, 2, keep straight anti-sway pole, 3, reverse bit, 4, three arriss connect the pole.
Detailed Description
The present invention will be described more clearly with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention. All other embodiments, which can be obtained by those skilled in the art without any inventive step based on the embodiments of the present invention, should be included in the scope of the present invention.
As shown in fig. 1-2, the invention provides a coal seam drilling straight-keeping and inclination-preventing device, which comprises a drill bit 1, a straight-keeping and inclination-preventing rod 2, a reverse drill bit 3 and a triangular connecting rod 4, wherein the straight-keeping and inclination-preventing rod 2 is connected with the drill bit 1 through a rod joint arranged at the head of the straight-keeping and inclination-preventing rod, and is connected with the triangular connecting rod 4 through a threaded hole arranged at the tail of the straight-keeping and inclination-preventing rod 2, and the reverse drill bit 3 is arranged on the straight-keeping and inclination-preventing rod 2 and is positioned at the connecting end of the.
The straight-keeping anti-skew rod 2 is provided with three spiral grooves, the width of each spiral groove is 20mm, the depth of each spiral groove is 12mm, the lead of each spiral groove is 192mm, and the spiral angle alpha is 12.8 degrees. The device has dual modes of fluid slag discharge and mechanical slag discharge at the same time through the three spiral grooves, the slag discharge mode of the straight-keeping anti-tilting rod 2 mainly adopts fluid slag discharge and adopts mechanical slag discharge as assistance, and the characteristic of the cooperative slag discharge of the fluid slag discharge and the mechanical slag discharge is fully embodied. The mechanical deslagging power is from the feeding force of the drilling machine in the drilling process, and drill cuttings in the three spiral grooves on the surface of the straight-preventing inclined rod 2 are kept in a flowing state, so that heat generated on the surface can be taken away in time, and the reliability of the device is improved.
Three vertical grooves with the width of 20mm and the depth of 12mm are milled in the circumferential direction of every 120 degrees of the straight-keeping anti-tilting rod 2, so that the frequency of stirring drill cuttings and the slag discharging efficiency of the device are improved.
The body of rod of keeping straight and preventing down tube 2 adopts 27SiMn steel pipe material, the external diameter of the body of rod is 94mm, internal diameter 48mm, wall thickness 23mm, and length is 800mm, and torsional strength T is 21927.4 ~ 26281.4 N.m. the body of rod adopts 27SiMn steel pipe material, has higher intensity and wearability, is favorable to improving the reliability of device.
A rod joint arranged at the head of the straightening and anti-sway rod 2 adopts a 42CrMo steel pipe, the static torsion strength T of the steel pipe is 7844.7 ~ 9413.6 N.m, the strength of the 42CrMo steel pipe is high, and the reliability of the device is ensured.
The reverse drill 3 comprises three alloy sheets which are uniformly distributed along the circumferential direction of the straightening anti-sway rod 2. When the straight-keeping drilling is adopted, because the full hole drilling is adopted, the situation that the drilling tool is difficult to withdraw can occur in the process of withdrawing the drilling tool, and particularly in the hole section with more collapsed hole drill cuttings, the drill jamming phenomenon is easily formed when the diameter of the device is the same as the diameter of the drilled hole, so that the straight-keeping inclined-prevention rod 2 cannot be withdrawn and fall into the hole. Through setting up reverse bit 3, when the rotation moves back the brill, realize reverse drilling, both made things convenient for and moved back the brill, not by a relatively large margin changes the device again, realizes moving back the brill smoothly.
The length of the three-edged connecting rod 4 is 500 mm. When the hole is normally drilled, the three-edge connecting rod 4 is connected with the drill bit 1, and after the drill bit is drilled for 2m, the straight-keeping anti-sway rod 2 is connected between the three-edge connecting rod 4 and the drill bit 1, so that straight-keeping drilling is realized, and the service life of the straight-keeping anti-sway rod 2 is prolonged.
The working principle of the invention is as follows: through the technical principle of the area of contact of increase drill bit 1 department and pore wall, at the drilling in-process, because traditional drilling rod can revolve around the drilling axis and slide along the pore wall, produce the revolution promptly, reaming phenomenon appears easily, and after installing the straight down-proof diagonal bar 2 additional, because its diameter is the same with drilling, can restrain the whipping of drill bit 1 on the one hand, even reaming phenomenon appears, straight down-proof diagonal bar 2 is close to drill bit 1 and connects, can utilize the device and the interact of drilling pore wall to be used for rightting the direction of drilling of drill bit 1, realize keeping straight the drilling.
The foregoing is merely a preferred embodiment of the invention and the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a coal seam drilling is protected directly and is prevented oblique device, includes the drill bit, its characterized in that: the drill bit is characterized by further comprising a straight-keeping anti-sway rod, a reverse drill bit and a three-edged connecting rod, wherein the straight-keeping anti-sway rod is connected with the drill bit through a rod joint arranged at the head of the straight-keeping anti-sway rod, and is connected with the three-edged connecting rod through a threaded hole arranged at the tail of the straight-keeping anti-sway rod, and the reverse drill bit is arranged on the straight-keeping anti-sway rod and is positioned at the connecting end of the straight.
2. The device of claim 1, wherein: the straight-keeping anti-skew rod is provided with three spiral grooves, the width of each spiral groove is 20mm, the depth of each spiral groove is 12mm, the lead of each spiral groove is 192mm, and the spiral angle alpha is 12.8 degrees.
3. The device of claim 2, wherein: three vertical grooves with the width of 20mm and the depth of 12mm are milled in the circumferential direction of every 120 degrees of the straight-keeping anti-sway rod.
4. The drilling straight-keeping and inclination-preventing device for the drill hole according to claim 3, wherein a 27SiMn steel pipe is adopted as a rod body of the straight-keeping and inclination-preventing rod, the outer diameter of the rod body is 94mm, the inner diameter of the rod body is 48mm, the wall thickness of the rod body is 23mm, the length of the rod body is 800mm, and the torsional strength T of the rod body is 21927.4 ~ 26281.4 N.m.
5. The device for keeping a drill hole straight and preventing the inclination according to claim 4 is characterized in that a rod joint arranged at the head of the straight and inclination-keeping rod adopts a 42CrMo steel pipe material, and the static torsional strength T of the device is 7844.7 ~ 9413.6 N.m.
6. The device of claim 1, wherein: the reverse drill comprises three alloy sheets which are uniformly distributed along the circumferential direction of the straight-keeping anti-sway rod.
7. The device of claim 1, wherein: the length of the three-edged connecting rod is 500 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002810.XA CN110630180B (en) | 2019-10-22 | 2019-10-22 | Coal seam drilling straight-keeping and inclined-preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002810.XA CN110630180B (en) | 2019-10-22 | 2019-10-22 | Coal seam drilling straight-keeping and inclined-preventing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110630180A true CN110630180A (en) | 2019-12-31 |
| CN110630180B CN110630180B (en) | 2024-03-12 |
Family
ID=68977057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911002810.XA Active CN110630180B (en) | 2019-10-22 | 2019-10-22 | Coal seam drilling straight-keeping and inclined-preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110630180B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201554388U (en) * | 2009-11-11 | 2010-08-18 | 钟贤鹏 | Improved auger stem |
| US20100236829A1 (en) * | 2006-06-22 | 2010-09-23 | Boart Longyear Global Holdco Inc. | Stabilizer for drill strings |
| CN102071886A (en) * | 2011-01-13 | 2011-05-25 | 河南理工大学 | Drill rod of double helix anti-lock drill |
| CN103939012A (en) * | 2014-04-28 | 2014-07-23 | 中国矿业大学(北京) | High-stress floppy protruding thick coal seam large-diameter drilling device |
| CN204040909U (en) * | 2014-08-29 | 2014-12-24 | 江苏省地矿地热能有限公司 | Anti-oblique packed hole assembly is used in underground heat exploitation |
| CN104314482A (en) * | 2014-10-23 | 2015-01-28 | 河南理工大学 | Closed type helical hole-protecting drill and using method thereof for drilling of soft coal bed |
| CN204627415U (en) * | 2015-05-05 | 2015-09-09 | 平顶山市铁福来机电设备有限公司 | A kind of way-type drilling unit for weak seam boring |
| CN105401893A (en) * | 2014-09-12 | 2016-03-16 | 王永龙 | Pressure-relief and hole-protection drill pipe for soft coal and rock drilling |
| CN105888540A (en) * | 2014-05-08 | 2016-08-24 | 中国庆华能源集团有限公司 | Drill hole drilling method |
| CN107558935A (en) * | 2017-08-08 | 2018-01-09 | 中煤科工集团重庆研究院有限公司 | A kind of improved screw type drilling rod |
| CN109281612A (en) * | 2018-09-29 | 2019-01-29 | 中国石油大学(华东) | A kind of high speed rotating drilling anti-inclining drill combination |
| CN210714466U (en) * | 2019-10-22 | 2020-06-09 | 山西长平煤业有限责任公司 | Coal seam drilling is protected directly and is prevented oblique device |
-
2019
- 2019-10-22 CN CN201911002810.XA patent/CN110630180B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100236829A1 (en) * | 2006-06-22 | 2010-09-23 | Boart Longyear Global Holdco Inc. | Stabilizer for drill strings |
| CN201554388U (en) * | 2009-11-11 | 2010-08-18 | 钟贤鹏 | Improved auger stem |
| CN102071886A (en) * | 2011-01-13 | 2011-05-25 | 河南理工大学 | Drill rod of double helix anti-lock drill |
| CN103939012A (en) * | 2014-04-28 | 2014-07-23 | 中国矿业大学(北京) | High-stress floppy protruding thick coal seam large-diameter drilling device |
| CN105888540A (en) * | 2014-05-08 | 2016-08-24 | 中国庆华能源集团有限公司 | Drill hole drilling method |
| CN204040909U (en) * | 2014-08-29 | 2014-12-24 | 江苏省地矿地热能有限公司 | Anti-oblique packed hole assembly is used in underground heat exploitation |
| CN105401893A (en) * | 2014-09-12 | 2016-03-16 | 王永龙 | Pressure-relief and hole-protection drill pipe for soft coal and rock drilling |
| CN104314482A (en) * | 2014-10-23 | 2015-01-28 | 河南理工大学 | Closed type helical hole-protecting drill and using method thereof for drilling of soft coal bed |
| CN204627415U (en) * | 2015-05-05 | 2015-09-09 | 平顶山市铁福来机电设备有限公司 | A kind of way-type drilling unit for weak seam boring |
| CN107558935A (en) * | 2017-08-08 | 2018-01-09 | 中煤科工集团重庆研究院有限公司 | A kind of improved screw type drilling rod |
| CN109281612A (en) * | 2018-09-29 | 2019-01-29 | 中国石油大学(华东) | A kind of high speed rotating drilling anti-inclining drill combination |
| CN210714466U (en) * | 2019-10-22 | 2020-06-09 | 山西长平煤业有限责任公司 | Coal seam drilling is protected directly and is prevented oblique device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110630180B (en) | 2024-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106894771A (en) | A kind of big pitch abnormal shape auger stem | |
| CN101280667B (en) | Low helical abrasion-proof drill rod for mash gas pumping drilling construction and machining process thereof | |
| CN210714466U (en) | Coal seam drilling is protected directly and is prevented oblique device | |
| CN106761451B (en) | Complex geological condition coal rock layer creeps into bionical flow liner drop resistance drilling rod and drilling method | |
| CN110630180A (en) | Coal seam drilling is protected directly and is prevented oblique device | |
| CN202611596U (en) | Stepped guide type coreless drill | |
| CN105604481B (en) | Multi power source way-type drilling unit for soft seam drilling | |
| CN207620738U (en) | A kind of wellbore shaping feature type drilling rod | |
| CN106907117B (en) | Universal wheel type near-bit stabilizer | |
| qiong Guo et al. | Development of PDC drill bits for MWD directional drilling in underground coal mine | |
| CN206513319U (en) | A kind of mining Three-edged drill stem | |
| CN205591861U (en) | Deflecting surface removable tyoe whipstock of windowing | |
| CN213684013U (en) | Welded blade type replaceable sleeve stabilizer | |
| CN210564438U (en) | Forging and milling device | |
| CN203334951U (en) | Down hole hammer | |
| CN209621214U (en) | A kind of novel combined drill bit | |
| CN204716135U (en) | A kind of drill bit assembly for Backpack type core-drill(ing) machine | |
| CN215718575U (en) | Grinding and milling drill bit for rope drilling accident treatment | |
| CN202176269U (en) | Multifunctional projecting proof drill rod | |
| CN208137852U (en) | A kind of hydraulic flushing in hole drilling tool with broken coal device | |
| WO2020007343A1 (en) | Fixed cutting structure-composite cone drill bit | |
| CN204782767U (en) | Tunnel country rock dowelling jig utensil of preventing collapsing | |
| CN206016712U (en) | A kind of well casing protector for monotubular twin-well technology | |
| CN105041217A (en) | Anti-sloughing drilling tool for surrounding rocks of tunnel | |
| CN212671567U (en) | Four-wing arc angle ten-tooth diamond bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |