CN202673167U - Three-arris drill pipe special for coal mine underground gas drainage - Google Patents
Three-arris drill pipe special for coal mine underground gas drainage Download PDFInfo
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- CN202673167U CN202673167U CN 201220279505 CN201220279505U CN202673167U CN 202673167 U CN202673167 U CN 202673167U CN 201220279505 CN201220279505 CN 201220279505 CN 201220279505 U CN201220279505 U CN 201220279505U CN 202673167 U CN202673167 U CN 202673167U
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Abstract
The utility model discloses a three-arris drill pipe special for coal mine underground gas drainage. The three-arris drill pipe comprises a three-arris drill pipe with a hollow structure and a hollow drill bit connected to an end portion of the three-arris drill pipe. A one-way baffle opened towards the drill tip direction is arranged inside the hollow drill bit. A slag discharging hole is arranged on a side wall of the hollow drill bit of the front portion of the one-way baffle. The three-arris drill pipe special for the coal mine underground gas drainage has the advantages of being simple in structure, convenient to operate and use, and solves the problem of collapse of an drilled drainage hole fundamentally. When the three-arris drill pipe is used, after a drilling machine drills the hollow drill pipe to reach to a certain depth, a gas drainage pipe is inserted from the tail end of the drill pipe, the gas drainage pipe pushes up the one-way baffle and penetrates through the drill bit, then the hollow drill pipe is pulled out, the gas drainage pipe is held up the interior of a hole drilled out by the drill pipe, and the three-arris drill pipe waits for carrying out drainage gas operation of the next step. When the drainage gas operation is finished, a gas exhaust pipe can be recycled.
Description
Technical field
The utility model relates to rig drilling tool under the coal mine, especially relates to the special-purpose Three-edged drill stem of a kind of coal mine gas extraction.
Background technology
At present, before the coal mining activity, need to get out gas extraction hole with rig first under the coal mine, the methane gas in the High gas area in the coal seam is extracted out in advance, and then carried out coal mining activity, to ensure the safety of coal mining activity.Along with improving constantly of mechanical coal mining degree, the fast development of coal production, the drilling depth of gas extraction hole, bore diameter are also in continuous increase.Because the complicated geological of rock stratum; gas density and pressure in the coal seam are changeable; often can occur the gas drainage under suction hole drill good after; in case extraction drilling rod; coal seam soft section (district) is bored good gas extraction hole and is occurred partly collapsing, and has blocked gas extraction hole, when gas drainage under suction; can't extraction or the pump drainage amount greatly reduce, bring potential safety hazard for coal mining activity afterwards.
Summary of the invention
The purpose of this utility model is to provide a kind of coal mine gas extraction special-purpose Three-edged drill stem, and this drilling rod can guarantee that the extraction hole is unobstructed, make complete to the drawing-off gas in coal seam, guarantee the safety of follow-up coal work.
For achieving the above object, the utility model can be taked following technical proposals:
The special-purpose Three-edged drill stem of coal mine gas extraction described in the utility model comprises the Three-edged drill stem of hollow-core construction and is connected to the hollow boring bit of described Three-edged drill stem end, is provided with the unidirectional baffle plate of opening to the apex point direction in the described hollow boring bit.
Offer mud hole on the sidewall of the hollow boring bit of described unidirectional baffle plate front portion, will bore procephalic cinder when making things convenient for gas drainage pipe to push unidirectional baffle plate open and release.
The utility model has the advantage of simple in structurely, easy for operation, fundamentally solved the problem that collapses in good extraction hole of boring.During use, after rig drives the hollow-rod drilling certain depth, insert gas drainage pipe from the drilling rod tail end, gas drainage pipe backs down unidirectional baffle plate and passes drill bit, then hollow drill is extracted, gas drainage pipe is trapped in the hole that drilling rod gets out, and waits the operation that draws out methane of pending bottom; After the operation that draws out methane was finished, the gas exhaust column can also recycle.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, the special-purpose Three-edged drill stem of coal mine gas extraction described in the utility model, the Three-edged drill stem 1 and the hollow boring bit 2 that is connected to Three-edged drill stem 1 end that comprise hollow-core construction, in hollow boring bit 2, be provided with the unidirectional baffle plate 3 of opening to the apex point direction, offer mud hole at the sidewall of the hollow boring bit of unidirectional baffle plate 3 front portions.
Before rig is started working, with first Three-edged drill stem 1 and hollow boring bit 2 be connected and fixed reliable after, start boring because unidirectional baffle plate 3 can only open to the apex point direction, so, can prevent during boring that cinder from entering in the inner chamber of Three-edged drill stem 1; After many drilling rods that link together are drilled into the required degree of depth, insert gas drainage pipe 4 from the afterbody of last root drilling rod, the degree of depth according to boring, gas exhaust column 4 also can many links together, when first gas drainage pipe 4 backs down unidirectional baffle plate 3, after passing hollow boring bit 2, Three-edged drill stem 1 can be extracted together with drill bit 2, gas drainage pipe 4 is trapped in the extraction hole that drilling rod gets out, etc. the operation that draws out methane of pending bottom, fundamentally solved the situation that extraction hole that weak seam occurs is collapsed, stopped up; After the operation that draws out methane was finished, gas exhaust column 4 can also reclaim and re-use.
Claims (2)
1. the special-purpose Three-edged drill stem of a coal mine gas extraction, comprise the Three-edged drill stem (1) of hollow-core construction and be connected to the hollow boring bit (2) of described Three-edged drill stem (1) end, it is characterized in that: be provided with the unidirectional baffle plate (3) of opening to the apex point direction in the described hollow boring bit (2).
2. the special-purpose Three-edged drill stem of coal mine gas extraction according to claim 1 is characterized in that: offer mud hole on the sidewall of the hollow boring bit that described unidirectional baffle plate (3) is anterior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220279505 CN202673167U (en) | 2012-06-14 | 2012-06-14 | Three-arris drill pipe special for coal mine underground gas drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220279505 CN202673167U (en) | 2012-06-14 | 2012-06-14 | Three-arris drill pipe special for coal mine underground gas drainage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202673167U true CN202673167U (en) | 2013-01-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220279505 Expired - Fee Related CN202673167U (en) | 2012-06-14 | 2012-06-14 | Three-arris drill pipe special for coal mine underground gas drainage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202673167U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352718A (en) * | 2013-07-29 | 2013-10-16 | 河南理工大学 | Fully-sealed wind power slagging gas-drainage deep well drilling system and method |
| CN109113786A (en) * | 2018-10-12 | 2019-01-01 | 安徽理工大学 | Drilling rod formula gas drainage device can be exited |
| CN109736877A (en) * | 2019-01-09 | 2019-05-10 | 淮南矿业(集团)有限责任公司 | A kind of concordant drilling pipe-following drilling mash gas extraction construction method |
-
2012
- 2012-06-14 CN CN 201220279505 patent/CN202673167U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352718A (en) * | 2013-07-29 | 2013-10-16 | 河南理工大学 | Fully-sealed wind power slagging gas-drainage deep well drilling system and method |
| CN103352718B (en) * | 2013-07-29 | 2015-07-15 | 河南理工大学 | Fully-sealed wind power slagging gas-drainage deep well drilling system and method |
| CN109113786A (en) * | 2018-10-12 | 2019-01-01 | 安徽理工大学 | Drilling rod formula gas drainage device can be exited |
| CN109113786B (en) * | 2018-10-12 | 2023-09-08 | 安徽理工大学 | Gas extraction device capable of withdrawing drill rod |
| CN109736877A (en) * | 2019-01-09 | 2019-05-10 | 淮南矿业(集团)有限责任公司 | A kind of concordant drilling pipe-following drilling mash gas extraction construction method |
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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: 20130116 Termination date: 20210614 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |