CN203925310U - A kind of coal mine gas extraction borehole guard aperture drilling rod - Google Patents
A kind of coal mine gas extraction borehole guard aperture drilling rod Download PDFInfo
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- CN203925310U CN203925310U CN201420039001.2U CN201420039001U CN203925310U CN 203925310 U CN203925310 U CN 203925310U CN 201420039001 U CN201420039001 U CN 201420039001U CN 203925310 U CN203925310 U CN 203925310U
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- guide pipe
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- guard aperture
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Abstract
A coal mine gas extraction borehole guard aperture drilling rod, belongs to the logical effective drilling rod of guard aperture.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.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.The male joint internal diameter of this brill, box joint internal diameter and guide pipe internal diameter three equate, when guard aperture pipe by hole endoporus through time, can not run into reducing step and cause guard aperture pipe clamp firmly cannot pass through.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 is lightweight, can make guard aperture pipe smooth and easy passing from drill pipe bore, also facilitates execute-in-place simultaneously.
Description
Technical field
The utility model 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 bright the collapsing of boring also can be for Gas provides lasting passage, oneself is adopted this method 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 return drilling rod, guard aperture pipe is through drill pipe bore, then return drilling rod, guard aperture pipe backs down drill bit internal switch and enters in boring, when all drilling rods return out 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 a kind of Stability Analysis of Structures of utility model, the light endoporus equal-diameter drill rod of operation transportation can be good at solving an above difficult problem.
Summary of the invention
The purpose of this utility model is that a kind of coal mine gas extraction borehole guard aperture drilling rod will be provided, and solves to the problem of sending into guard aperture pipe difficulty in weak seam boring.
The purpose of this utility model 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, one end is connected with male joint, the other end is connected with box joint, guide pipe is circle, its external diameter is less than body of rod internal diameter, guide pipe is inner through the body of rod, 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 equate with guide pipe internal diameter three.
At described 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.
Described male joint and box joint connect thread taper scope at 1:10 ~ 1:15.
Owing to having adopted such scheme, the utlity model 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.
the specific embodiment
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, and 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, in described male joint 4 and box joint 1, be provided with step 7 with guide pipe 2 junctions, 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 (2)
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: at described 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. a kind of coal mine gas extraction borehole guard aperture drilling rod 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 |
|---|---|---|---|
| CN201420039001.2U CN203925310U (en) | 2014-01-22 | 2014-01-22 | A kind of coal mine gas extraction borehole guard aperture drilling rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420039001.2U CN203925310U (en) | 2014-01-22 | 2014-01-22 | A kind of coal mine gas extraction borehole guard aperture drilling rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203925310U true CN203925310U (en) | 2014-11-05 |
Family
ID=51821139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420039001.2U Expired - Fee Related CN203925310U (en) | 2014-01-22 | 2014-01-22 | A kind of coal mine gas extraction borehole guard aperture drilling rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203925310U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758465A (en) * | 2014-01-22 | 2014-04-30 | 平顶山天安煤业股份有限公司 | Drill rod for coal mine underground gas extraction drill hole protection |
| CN108798543A (en) * | 2018-06-07 | 2018-11-13 | 贵州中钻机械设备有限公司 | Down-the-hole drilling pipe improved structure |
-
2014
- 2014-01-22 CN CN201420039001.2U patent/CN203925310U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758465A (en) * | 2014-01-22 | 2014-04-30 | 平顶山天安煤业股份有限公司 | Drill rod for coal mine underground gas extraction drill hole protection |
| CN108798543A (en) * | 2018-06-07 | 2018-11-13 | 贵州中钻机械设备有限公司 | Down-the-hole drilling pipe improved structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20170122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |