CN110630180B - Coal seam drilling straight-keeping and inclined-preventing device - Google Patents
Coal seam drilling straight-keeping and inclined-preventing device Download PDFInfo
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- CN110630180B CN110630180B CN201911002810.XA CN201911002810A CN110630180B CN 110630180 B CN110630180 B CN 110630180B CN 201911002810 A CN201911002810 A CN 201911002810A CN 110630180 B CN110630180 B CN 110630180B
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- drilling
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- 238000005553 drilling Methods 0.000 title claims abstract description 66
- 239000003245 coal Substances 0.000 title claims abstract description 17
- 230000002441 reversible effect Effects 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 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
- 230000002265 prevention Effects 0.000 claims 3
- 238000000605 extraction Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000012797 qualification Methods 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 8
- 239000012530 fluid Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005065 mining Methods 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. The invention has high reliability, is beneficial to improving drilling technology, improving pore-forming quality and improving drilling qualification rate, thereby promoting the reduction of drilling deviation distance, being beneficial to reducing blank zone of gas extraction, improving gas extraction effect and ensuring mine safety production.
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 coal seam mining depth in China and the increasing requirement of mines on safe production, the development of gas extraction technology in China enters a low-permeability coal seam reinforced extraction stage. The coal seam gas extraction needs extraction drilling holes, the gas extraction drilling holes are the fundamental guarantee for realizing gas extraction, and the drilling quality plays a key role in the gas extraction effect. The extraction drilling hole straightening and inclination preventing technology is one of key technologies for coal seam gas extraction, but the gas extraction drilling hole is generally inclined. In the process of drilling construction, the drilling is greatly influenced by the azimuth angle, the inclination angle, the hardness change and the inclination change of a coal (rock) layer, and the technological parameters such as feeding force, rotating speed, pump quantity and the like in the construction process, so that the deviation of the drilling from left to right and from top to bottom is large, and even some drilling is directly a waste hole due to the large deviation. Once the drill holes are deflected, the interval between partial drill holes in the coal seam is too large, a hollow drainage zone is formed, the purpose of reducing the outburst of gas cannot be achieved, and therefore the gas drainage effect is affected. Therefore, the deflection problem of the drilling hole is one of the biggest problems affecting the gas extraction effect.
Although research is carried out at home and abroad to solve the problem of borehole deviation, a few correction methods are also proposed, but so far, the coal mine lacks a high-precision, strong-adaptability, easy-to-use and convenient straight-keeping and inclination-preventing technology and device. In order to solve the problem, it is necessary to design a coal seam drilling straightening and inclination preventing device, so that the offset distance is reduced, the blank zone for gas extraction is reduced, the gas extraction effect is improved, and the mine safety production is ensured.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a coal seam drilling straightening and inclination preventing device which can ensure the construction quality of extraction drilling holes in the drilling process, solve the problem of common drilling 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 directly prevents inclined device, includes the drill bit, is protected directly prevents inclined rod, reverse drill bit and triangular connecting rod, it is connected with the drill bit to protect directly to prevent the inclined rod through the pole joint that its head set up, is connected with the triangular connecting rod through the screw hole that its afterbody set up, reverse drill bit sets up on guaranteeing directly preventing the inclined rod and is located and protect directly preventing the connecting end of inclined rod and triangular connecting rod.
Preferably, the straight-keeping and anti-inclined rod is provided with a three-spiral groove, the width of the three-spiral groove is 20mm, the depth of the three-spiral groove is 12mm, the lead of the three-spiral groove is 192mm, and the spiral angle alpha is 12.8 degrees. The device has the dual modes of fluid slag discharge and mechanical slag discharge simultaneously through the three spiral grooves, the straight-keeping and inclined-rod-preventing slag discharge mode is mainly based on fluid slag discharge, and mechanical slag discharge is auxiliary, so that the cooperative slag discharge characteristics of fluid slag discharge and mechanical slag discharge are fully embodied. The mechanical deslagging power comes 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 in a flowing state, so that heat generated on the surface can be timely taken away, and the reliability of the device is improved.
Preferably, three vertical grooves with the width of 20mm and the depth of 12mm are respectively milled in the circumferential direction of each 120-degree inclined rod, so that the frequency of stirring drilling cuttings and the slag discharging efficiency of the device are improved.
Preferably, the rod body of the straight-keeping anti-tilting rod is made of 27SiMn steel pipe, 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 is 21927.4-26681.4N.m. The rod body adopts a 27SiMn steel pipe, has higher strength and wear resistance, and is beneficial to improving the reliability of the device.
Preferably, the rod joint arranged at the head of the straight-keeping and inclined-rod-preventing head adopts a 42CrMo steel pipe, the static torsion strength T of the rod joint is 7844.7-9413.6N.m, the 42CrMo steel pipe is high in strength, and the reliability of the device is guaranteed.
Preferably, the reversing drill bit comprises three alloy sheets which are uniformly distributed along the circumference of the straight-keeping and inclined-preventing rod. When the straight drilling is adopted, because full holes are adopted for drilling, the condition that the drilling tool is difficult to withdraw possibly occurs in the process of withdrawing the drilling tool, particularly, when the drilling tool is in a condition of encountering a hole section with more accumulated collapsed drill scraps, the device diameter is the same as the drilling diameter, the phenomenon of blocking the drilling tool is easy to form, and the straight-keeping inclined rod cannot withdraw from the falling hole. By arranging the reverse drill bit, reverse drilling is realized when the drill is rotated to retract, so that the drill is retracted conveniently, the device is not changed greatly, and smooth drill retraction is realized.
Preferably, the length of the triangular connecting rod is 500mm. When the drilling is normally perforated, the triangular connecting rod is connected with the drill bit, after the drilling is started for 2m, the straight-keeping and anti-inclined rod is connected between the triangular connecting rod and the drill bit, so that straight-keeping drilling is realized, and the service life of the straight-keeping and anti-inclined rod is prolonged.
The invention also comprises other components which can ensure that the drilling straightening and anti-tilting device is normally used, and the device is a conventional technical means in the field. In addition, the devices or components not defined in the present invention are all conventional 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, in the drilling process, because traditional drilling rod can rotate and slide along the pore wall around the drilling axis, produce revolution promptly, appear reaming phenomenon easily, and after installing the straight-keeping and prevent down-link additional, because its diameter is the same with the drilling, can restrain the whipping of drill bit on the one hand, even appear reaming phenomenon, keep straight-keeping and prevent down-link and be connected next to the drill bit, can utilize the device and the interaction of drilling pore wall to right the drilling direction of drill bit, realize keeping straight drilling.
The invention has the advantages of simple structure and high reliability, is beneficial to improving drilling technology, improving hole forming quality and increasing drilling qualification rate, thereby promoting the reduction of the offset distance of drilling holes, being beneficial to reducing blank zones of gas extraction, improving gas extraction effect and ensuring mine safety production.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the invention and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout.
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-tilting lever of the invention.
In the figure: 1. the drill bit, 2, the straight-keeping and inclined-preventing rod, 3, the reverse drill bit, and 4, the triangular connecting rod.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown, and in which embodiments of the invention are shown. All other embodiments, modifications, equivalents, improvements, etc., which are apparent to those skilled in the art without the benefit of this disclosure, are intended to be included within the scope of this invention.
As shown in fig. 1-2, the invention provides a coal seam drilling straight-keeping and inclined-preventing device, which comprises a drill bit 1, a straight-keeping and inclined-preventing rod 2, a reverse drill bit 3 and a triangular connecting rod 4, wherein the straight-keeping and inclined-preventing rod 2 is connected with the drill bit 1 through a rod joint arranged at the head part of the straight-keeping and inclined-preventing rod 2, is connected with the triangular connecting rod 4 through a threaded hole arranged at the tail part of the straight-keeping and inclined-preventing rod 2, and the reverse drill bit 3 is arranged on the straight-keeping and inclined-preventing rod 2 and is positioned at the connecting end of the straight-keeping and inclined-preventing rod 2 and the triangular connecting rod 4.
The straight-keeping anti-tilting lever 2 is provided with a three-spiral groove, the width of the three-spiral groove is 20mm, the depth is 12mm, the lead is 192mm, and the helix angle alpha is 12.8 degrees. The device has the dual modes of fluid slag discharge and mechanical slag discharge simultaneously through the three spiral grooves, the slag discharge mode of the straight-keeping anti-diagonal rod 2 takes fluid slag discharge as a main part, and mechanical slag discharge as an auxiliary part, so that the cooperative slag discharge characteristics of fluid slag discharge and mechanical slag discharge are fully reflected. The mechanical deslagging power comes 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 anti-tilting lever 2 are kept in a flowing state, so that heat generated on the surface can be timely taken away, and the reliability of the device is improved.
Three vertical grooves with the width of 20mm and the depth of 12mm are respectively milled in the circumferential direction of each 120-degree angle rod 2, so that the frequency of stirring drilling cuttings and the slag discharging efficiency of the device are improved.
The rod body of the straightening and anti-tilting rod 2 is made of a 27SiMn steel pipe, 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 is 21927.4-26681.4N.m. The rod body adopts a 27SiMn steel pipe, has higher strength and wear resistance, and is beneficial to improving the reliability of the device.
The rod joint arranged at the head of the straightening and anti-tilting rod 2 adopts a 42CrMo steel pipe, the static torsion strength T of the rod joint is 7844.7-9413.6N.m, the strength of the 42CrMo steel pipe is high, and the reliability of the device is ensured.
The reversing drill bit 3 comprises three alloy sheets which are uniformly distributed along the circumference of the straight-keeping and inclined-preventing rod 2. When adopting and protect straight drilling, owing to adopt full hole to bore, consequently, in the in-process of moving back the boring, the condition that the drilling tool is difficult to withdraw from probably can appear, especially is in the hole section that collapses the bits of boring and pile up more, and the device diameter is the same with the drilling diameter and is easy to form the card and bore the phenomenon for protect straight and prevent inclined rod 2 can't withdraw from falling into the hole. By arranging the reverse drill bit 3, reverse drilling is realized when the drill is rotated to retract, so that the drill is retracted conveniently, the device is not changed greatly, and smooth drill retraction is realized.
The length of the triangular connecting rod 4 is 500mm. When the drilling is normally perforated, the triangular connecting rod 4 is connected with the drill bit 1, after the drilling is started for 2m, the straight-keeping and anti-inclined rod 2 is connected between the triangular connecting rod 4 and the drill bit 1, straight-keeping drilling is realized, and the service life of the straight-keeping and anti-inclined rod 2 is prolonged.
The working principle of the invention is as follows: through the technical principle of increasing the area of contact of drill bit 1 department and pore wall, in the drilling process, because traditional drilling rod can rotate around the drilling axis and slide along the pore wall, produce revolution promptly, appear reaming phenomenon easily, and after installing the straight-keeping and prevent down-rod 2 additional, because its diameter is the same with the drilling, can restrain the whipping of drill bit 1 on the one hand, even appear reaming phenomenon, keep straight and prevent down-rod 2 and be connected next to drill bit 1, can utilize the device and the interaction of drilling pore wall to right the drilling direction of drill bit 1, realize keeping straight and bore.
The foregoing description of the preferred embodiments of the invention is illustrative, not exhaustive, and is not limited to the disclosed examples. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be comprehended within the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a coal seam drilling is protected straight and is prevented inclined device, includes drill bit, its characterized in that: the anti-tilting device comprises a drill rod, a drill rod connecting rod and a reverse drill bit, wherein the drill rod is connected with the drill rod through a rod connector arranged at the head of the drill rod, the drill rod is connected with the drill rod through a threaded hole arranged at the tail of the drill rod, and the reverse drill bit is arranged on the anti-tilting rod and is positioned at the connecting end of the anti-tilting rod and the drill rod; the straight-keeping anti-skew rod is provided with a three-spiral groove, the width of the three-spiral groove is 20mm, the depth of the three-spiral groove is 12mm, the lead of the three-spiral groove is 192mm, and the spiral angle alpha of the three-spiral groove is 12.8 degrees; three vertical grooves with the width of 20mm and the depth of 12mm are respectively milled in the circumferential direction of each 120 DEG of the vertical protection and anti-tilting rod; the reverse drill bit comprises three alloy sheets which are uniformly distributed along the circumference of the straight-keeping and inclined-preventing rod.
2. The drill hole straightening and tilting prevention device according to claim 1, wherein: the rod body of the straight-keeping anti-tilting rod is made of a 27SiMn steel pipe, 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 is 21927.4-26281.4 N.m.
3. The drill hole straightening and tilting prevention device according to claim 2, wherein: the rod joint arranged at the head of the straight-keeping and inclined-rod-preventing head adopts a 42CrMo steel pipe, and the static torsion strength T of the rod joint is 7844.7-9413.6 N.m.
4. The drill hole straightening and tilting prevention device according to claim 1, wherein: the length of the triangular connecting rod is 500mm.
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 CN110630180A (en) | 2019-12-31 |
| CN110630180B true CN110630180B (en) | 2024-03-12 |
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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 |
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| CN (1) | CN110630180B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201554388U (en) * | 2009-11-11 | 2010-08-18 | 钟贤鹏 | Improved auger stem |
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| CN105401893A (en) * | 2014-09-12 | 2016-03-16 | 王永龙 | Pressure-relief and hole-protection drill pipe for soft coal and rock drilling |
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| CN109281612A (en) * | 2018-09-29 | 2019-01-29 | 中国石油大学(华东) | A high-speed rotary percussion drilling anti-deviation drilling tool assembly |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2550801C (en) * | 2006-06-22 | 2010-07-20 | Boart Longyear Inc. | Drilling equipment |
-
2019
- 2019-10-22 CN CN201911002810.XA patent/CN110630180B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 |
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| Publication number | Publication date |
|---|---|
| CN110630180A (en) | 2019-12-31 |
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