CN103758465A - Drill rod for coal mine underground gas extraction drill hole protection - Google Patents
Drill rod for coal mine underground gas extraction drill hole protection Download PDFInfo
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- CN103758465A CN103758465A CN201410028887.5A CN201410028887A CN103758465A CN 103758465 A CN103758465 A CN 103758465A CN 201410028887 A CN201410028887 A CN 201410028887A CN 103758465 A CN103758465 A CN 103758465A
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- guide pipe
- rod
- buckle connector
- drill
- joint
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Abstract
The invention provides a drill rod for coal mine underground gas extraction drill hole protection, and belongs to drill rods for drilling holes and laying hole protecting pipes. The drill rod comprises a male buckle connector, a female buckle connector, a rod body and a guide pipe. The rod body is round, the male buckle connector is connected with one end of the rod body, and the female buckle connector is connected with the other end of the rod body. The guide pipe is round, and the outer diameter of the guide pipe is smaller than the inner diameter of the rod body. The guide pipe penetrates through the interior of the rod body, the male buckle connector is connected with one end of the guide pipe, and the female buckle connector is connected with the other end of the guide pipe. The inner diameter of the male buckle connector, the inner diameter of the female buckle connector and the inner diameter of the guide pipe are equal. The inner diameter of the male buckle connector, the inner diameter of the female buckle connector and the inner diameter of the guide pipe are equal, and thus when a hole protecting pipe penetrates from a drill hole, the phenomenon that the hole protecting pipe is clamped and cannot pass through due to the fact that the hole protecting pipe meets a reducing step can be avoided. The drill rod structure is only formed by the male buckle connector, the female buckle connector, the rod body and the guide pipe, coaxiality is high, the structure is stable, the weight is low, the hole protecting pipe can penetrate through the inner hole of the drill rod smoothly, and meanwhile field operation is convenient.
Description
Technical field
The present invention relates to the effective drilling rod of a kind of logical guard aperture, especially a kind of coal mine gas extraction borehole guard aperture drilling rod.
Background technology
Weak seam proportion in China's coal-mine is larger, and weak seam boring is yielding, to cave in be a great problem of puzzlement weak seam gas control.To being lowered to gas pumping screen casing in boring, can resist to a certain extent boring distortion, even if cave in also can be for Gas provides lasting passage in boring, this method is adopted by a lot of mining areas.Because the track of boring own is non-rectilinear, in boring, push guard aperture pipe and easily block manually, difficulty is large, and success rate is low.Chinese patent (patent No. CN101446178A) discloses the soft projecting coal bed Wind pressure air drilling equipment in a kind of down-hole and process matched therewith, after boring, do not move back drilling rod, guard aperture pipe is through drill pipe bore, then move back drilling rod, guard aperture pipe backs down drill bit internal switch and enters in boring, when all drilling rods exit completely, guard aperture pipe has also just been stayed in boring.But colliery is not completely smooth with drilling rod inwall, and the needs due to connecting thread tapering, the thickness of the common drilling rod body of rod is less than the thickness of connecting thread, there is reducing step in the drilling rod body of rod and nipple weld like this, thereby cause guard aperture pipe to be easily stuck when by this place, cause guard aperture failure.Therefore, adopting the isodiametric drilling rod of endoporus is to address this problem better selection.The endoporus equal-diameter drill rod existing is in the market to adopt the thick very large drilling rod of an endwall directly to process, and has the shortcoming that drilling rod weight is large, not only to rig, brings very large live load, also to workman's carrying, conveying, has brought the very large amount of labour.Therefore invent a kind of Stability Analysis of Structures, the light endoporus equal-diameter drill rod of operation transportation can be good at solving an above difficult problem.
Summary of the invention
The object of the invention is to provide a kind of coal mine gas extraction borehole guard aperture drilling rod, solve to the problem of sending into guard aperture pipe difficulty in weak seam boring.
Object of the present invention realizes in the following manner: a kind of coal mine gas extraction borehole guard aperture comprises with drilling rod: male joint, box joint, the body of rod and guide pipe; The body of rod is circular, and one end is connected with male joint, and the other end is connected with box joint, guide pipe is circle, and its external diameter is less than body of rod internal diameter.Guide pipe is inner through the body of rod, and its one end is connected with male joint, and the other end is connected with box joint, male joint internal diameter, box joint internal diameter are equal with guide pipe internal diameter three.
Described male joint and box joint and guide pipe junction are provided with step, and step is cylindrical, and its diameter is greater than guide pipe 0.1mm ~ 0.3mm.
Described male joint and box joint connect thread taper scope at 1:10 ~ 1:15.
Owing to having adopted such scheme, the present invention has following excellent effect:
1. male joint internal diameter, box joint internal diameter and guide pipe internal diameter three equate, do not have reducing step, when guard aperture pipe is passed by the endoporus of holing, can not block.
2. guide pipe of the present invention only plays the effect of guiding, not having transfer of torque and feeding of task, so it is relatively very little that diameter can be processed, between guide pipe and the body of rod, just there is so very large annular clearance, compare with the isodiametric heavy wall drill pipe of endoporus existing in the market, greatly alleviate the weight of drilling rod, alleviated the load of rig.Facilitate down-hole carrying, transportation.Particularly, in underworkings space, when mechanical transport cannot be realized in a lot of regions, the carrying of drilling rod only can, by manually completing, by the present invention, can realize similar drilling rod weight saving more than 20%.
3. jackrod structure is only comprised of male joint, box joint, the body of rod and guide pipe four parts, and axiality is high, and Stability Analysis of Structures connects by friction welding, antitorque good apart from performance.
Accompanying drawing explanation
Fig. 1 is the logical effective drilling rod sectional structure chart of guard aperture of coal mine gas extraction borehole of the present invention.
Fig. 2 is that two drilling rods of the present invention connect sectional structure chart.
In figure, 1, box joint; 2, guide pipe; 3, the body of rod; 4, male joint; 5, external screw thread; 6, internal thread; 7, step; 8, body of rod friction welding contact.
specific implementation method
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described.
Embodiment 1: a kind of coal mine gas extraction borehole guard aperture drilling rod, as shown in Figure 1, comprises box joint 1, guide pipe 2, the body of rod 3 and male joint 4.The body of rod 3 is circular, and one end is connected with male joint 4, and the other end is connected with box joint 1.Guide pipe 2 is circular, and its external diameter is less than body of rod internal diameter.Guide pipe 2 is through the body of rod 3 inside, and its one end is connected with male joint 4, and the other end is connected with box joint 1.Male joint 4 internal diameters, box joint 1 internal diameter and guide pipe 2 internal diameter threes equate.Interlude at the body of rod has body of rod friction welding contact 8.
As shown in Figure 1, described male joint 4 and box joint 1 are provided with step 7 with guide pipe 2 junctions, and step 7 is cylindrical, and its diameter is 42.2mm.
Described male joint is male connection, and box joint is female adapter, and both are 1:10 by thread taper, and male joint and the body of rod be directly by together with friction welding, and box joint and the body of rod are also by together with friction welding.Described male joint and box joint steel pipe material are 42CrMo, and it is R780 that the body of rod is selected tube material, and it is common stainless steel that guide pipe is selected tube material.
If construction drill aperture is 89mm, male joint external diameter, box joint external diameter and body of rod external diameter are 73mm, and male joint internal diameter, box joint internal diameter and guide pipe internal diameter are 39mm.Guide pipe wall thickness 3mm,
As shown in Figure 2, actual, drill in process, the male joint of the box joint of last joint drilling rod and a rear joint drilling rod, circulation successively, the internal diameter of all like this drilling rods all equates, for 39mm, not have reducing step, facilitates guard aperture pipe to pass smoothly.
Claims (3)
1. a coal mine gas extraction borehole guard aperture drilling rod, is characterized in that: this drilling rod comprises male joint, box joint, the body of rod and guide pipe; The body of rod is circular, and one end is connected with male joint, and the other end is connected with box joint; Guide pipe is circular, and its external diameter is less than body of rod internal diameter, and guide pipe is inner through the body of rod, and its one end is connected with male joint, and the other end is connected with box joint; Male joint internal diameter, box joint internal diameter and guide pipe internal diameter three equate.
2. a kind of coal mine gas extraction borehole guard aperture drilling rod according to claim 1, is characterized in that: describedly at male joint and box joint and guide pipe junction, be provided with step, step is cylindrical, and its diameter is greater than guide pipe 0.1mm ~ 0.3mm.
3. tape guide pipe bit bar for gas pumping hole drilling for colliery according to claim 1 and 2, is characterized in that: male joint and box joint connect thread taper scope at 1:10 ~ 1:15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410028887.5A CN103758465A (en) | 2014-01-22 | 2014-01-22 | Drill rod for coal mine underground gas extraction drill hole protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410028887.5A CN103758465A (en) | 2014-01-22 | 2014-01-22 | Drill rod for coal mine underground gas extraction drill hole protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103758465A true CN103758465A (en) | 2014-04-30 |
Family
ID=50525765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410028887.5A Pending CN103758465A (en) | 2014-01-22 | 2014-01-22 | Drill rod for coal mine underground gas extraction drill hole protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103758465A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121549A (en) * | 2016-08-26 | 2016-11-16 | 蒲长晏 | Water saving drilling rod |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5538092A (en) * | 1994-10-27 | 1996-07-23 | Ingersoll-Rand Company | Flexible drill pipe |
| CN101413381A (en) * | 2008-11-13 | 2009-04-22 | 煤炭科学研究总院西安研究院 | Large through-hole middle wind pressure seal drill rod |
| CN201627542U (en) * | 2010-03-08 | 2010-11-10 | 江苏中煤矿山设备有限公司 | Split mine triangular drill rod |
| CN202689958U (en) * | 2012-07-26 | 2013-01-23 | 田建伟 | Arc-shaped ribbed drill rod with isodiametric central holes |
| CN202900066U (en) * | 2012-11-14 | 2013-04-24 | 中煤科工集团西安研究院 | Externally-flush geological drill rod using double-top double-cone connection form |
| CN103410450A (en) * | 2013-08-13 | 2013-11-27 | 镇江安达煤矿专用设备有限公司 | Double-tubular drill rod |
| CN203925310U (en) * | 2014-01-22 | 2014-11-05 | 平顶山天安煤业股份有限公司 | A kind of coal mine gas extraction borehole guard aperture drilling rod |
-
2014
- 2014-01-22 CN CN201410028887.5A patent/CN103758465A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5538092A (en) * | 1994-10-27 | 1996-07-23 | Ingersoll-Rand Company | Flexible drill pipe |
| CN101413381A (en) * | 2008-11-13 | 2009-04-22 | 煤炭科学研究总院西安研究院 | Large through-hole middle wind pressure seal drill rod |
| CN201627542U (en) * | 2010-03-08 | 2010-11-10 | 江苏中煤矿山设备有限公司 | Split mine triangular drill rod |
| CN202689958U (en) * | 2012-07-26 | 2013-01-23 | 田建伟 | Arc-shaped ribbed drill rod with isodiametric central holes |
| CN202900066U (en) * | 2012-11-14 | 2013-04-24 | 中煤科工集团西安研究院 | Externally-flush geological drill rod using double-top double-cone connection form |
| CN103410450A (en) * | 2013-08-13 | 2013-11-27 | 镇江安达煤矿专用设备有限公司 | Double-tubular drill rod |
| CN203925310U (en) * | 2014-01-22 | 2014-11-05 | 平顶山天安煤业股份有限公司 | A kind of coal mine gas extraction borehole guard aperture drilling rod |
Non-Patent Citations (1)
| Title |
|---|
| 刘广志: "《金刚石钻探手册》", 31 December 1991, 地质出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121549A (en) * | 2016-08-26 | 2016-11-16 | 蒲长晏 | Water saving drilling rod |
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Application publication date: 20140430 |