CN206376758U - Welded formula double-wall drill pipe - Google Patents
Welded formula double-wall drill pipe Download PDFInfo
- Publication number
- CN206376758U CN206376758U CN201621436868.7U CN201621436868U CN206376758U CN 206376758 U CN206376758 U CN 206376758U CN 201621436868 U CN201621436868 U CN 201621436868U CN 206376758 U CN206376758 U CN 206376758U
- Authority
- CN
- China
- Prior art keywords
- drill pipe
- wall drill
- double
- inner tube
- welded formula
- 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.)
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Abstract
The utility model discloses a kind of welded formula double-wall drill pipe, comprising：Inner and outer pipes drill pipe body, is integrally formed and is made, and is made up of inner tube and the outer tube being set in outside the inner tube；Pin end, is connected with the first end of inner tube by friction welding；Female joint, is connected with the second end of inner tube by friction welding.Connected between joint of the present utility model and inner tube using friction welding mode, without setting sealing structure, it is ensured that the sealing of the annular space between double-wall drill pipe inner and outer pipe, it is ensured that the cycle efficieny of compressed air；Also, processing technology is simple, practical, effectively improves the service life of double-wall drill pipe.
Description
Technical field
The utility model is related to a kind of double-wall drill pipe, specifically refers to a kind of welded formula double-walled with special construction and bores
Bar, belongs to oil drilling tools technical field.
Background technology
Double-wall drill pipe is a kind of drilling tool for being conducive to passing through bad ground.In drilling, compressed air is in double-wall drill pipe
Circulate, form a closed circuit circulatory system.Even if running into old gallery or solution cavity in drilling process, once double-wall drill pipe reaches hole
Bottom, the normal circulation of compressed air inside can also be recovered immediately, and this is to realize in conventional drilling method.This
Outside, double-wall drill pipe is packed hole assembly, and hole wall gap is small, therefore the steric requirements that broken sillar does not cave in, therefore double-wall drill pipe pair
Hole wall also has certain support protective effect；And it is rigid good, seldom occur hole deviation.Brill is also ensured using double-wall drill pipe simultaneously
Enter the continuity of process, it is to avoid because frequently put pressure excitement and swabbing action that drilling tool formed and to drilling caused by it is broken
It is bad.Double-wall drill pipe scale specification is consistent, will not occur hole depth measurement error；Regardless of formation condition, sample taking rate total energy
Reach or close to 100%, and without external pollution.Because double-wall drill pipe has above-mentioned a variety of advantages, thus it is increasingly wider
General application.
In the prior art, double-wall drill pipe is a kind of drilling rod of special construction.Conventional double-wall drill pipe is by inside and outside two layers of drilling rod
（That is inner and outer tubes）Constituted.Annular space is constituted between inner and outer pipe, when being the defeated rock drilling of waterpower or sampling core drilling, compression
The circulation canal of air；And inner tube centre bore is then the passage that scouring media is conveyed to bottom hole pump.Two double-walleds being connected are bored
Now connected by silk cause for gossip between bar, outer tube, it is ensured that transmission moment of torsion and pressure；Realized and connected by plugging mode between inner tube,
Play a part of the scouring media that circulates.Therefore, the junction that patches between inner tube must be provided with sealing structure, is situated between with ensureing to rinse
Matter will not leak, so the size to double-wall drill pipe requires stricter, while so that processing technology is more complicated, but reality is close
Seal effect and practicality is unsatisfactory.
Utility model content
The purpose of this utility model is to provide a kind of welded formula double-wall drill pipe, and friction welding (FW) is used between joint and inner tube
The mode of connecing is connected, without setting sealing structure, it is ensured that the sealing of the annular space between double-wall drill pipe inner and outer pipe, it is ensured that compression is empty
The cycle efficieny of gas；Also, processing technology is simple, practical, effectively improves the service life of double-wall drill pipe.
To achieve the above object, the technical solution of the utility model is to provide a kind of welded formula double-wall drill pipe, comprising：
Inner and outer pipes drill pipe body, is integrally formed and is made, and is made up of inner tube and the outer tube being set in outside the inner tube；Pin end, it is and interior
The first end of pipe is connected by friction welding；Female joint, is connected with the second end of inner tube by friction welding.
Described inner tube has centre bore, is the passage that double-wall drill pipe conveyed during the drilling of stratum scouring media.
Annular space is formed between described outer tube and inner tube, the circulation of compressed air is led to when being double-wall drill pipe progress stratum drilling
Road.
Described welded formula double-wall drill pipe, is also included：Pin end overcoat, is set in the outside of pin end, with outer tube
First end connected by casing round thread.
Described welded formula double-wall drill pipe, is also included：Female joint overcoat, is set in the outside of female joint, with outer tube
The second end connected by casing round thread.
In summary, welded formula double-wall drill pipe described in the utility model, uses friction welding (FW) between joint and inner tube
The mode of connecing is connected, without setting sealing structure, it is ensured that the sealing of the annular space between double-wall drill pipe inner and outer pipe, it is ensured that compression is empty
The cycle efficieny of gas；Also, processing technology is simple, practical, effectively improves the service life of double-wall drill pipe.
Brief description of the drawings
Fig. 1 be the utility model in welded formula double-wall drill pipe structural representation.
Embodiment
Below in conjunction with Fig. 1, a preferred embodiment of the present utility model is described in detail.
As shown in figure 1, be welded formula double-wall drill pipe provided by the utility model, comprising：Inner and outer pipes drill pipe body,
It is integrally formed and is made, is made up of inner tube 1 and the outer tube 2 being set in outside the inner tube 1；Pin end 4, the first end with inner tube 1
Connected by friction welding；Female joint 6, is connected with the second end of inner tube 1 by friction welding.
Described inner tube 1 has centre bore, is the passage that double-wall drill pipe conveyed during the drilling of stratum scouring media.
Annular space 3 is formed between described outer tube 2 and inner tube 1, compressed air follows when being double-wall drill pipe progress stratum drilling
Ring passage.
Described welded formula double-wall drill pipe, is also included：Pin end overcoat 5, is set in the outside of pin end 4, and outer
The first end of pipe 2 is connected by casing round thread.
Described welded formula double-wall drill pipe, is also included：Female joint overcoat 7, is set in the outside of female joint 6, and outer
Second end of pipe 2 is connected by casing round thread.
In summary, welded formula double-wall drill pipe described in the utility model, between pin end and female joint and inner tube
Connected using friction welding mode, and do not use socket connection mode, not only without additionally setting sealing structure, while can also be true
The sealing for the annular space protected between double-wall drill pipe inner and outer pipe, sealing effectiveness has a clear superiority compared with plug-in type double-wall drill pipe, so that
Ensure the cycle efficieny of compressed air；It is practical also, processing technology is fairly simple, effectively improve the use of double-wall drill pipe
Life-span.
Although content of the present utility model is discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as to limitation of the present utility model.After those skilled in the art have read the above, for
A variety of modifications and substitutions of the present utility model all will be apparent.Therefore, protection domain of the present utility model should be by appended
Claim limit.
Claims (5)
1. a kind of welded formula double-wall drill pipe, it is characterised in that include：
Inner and outer pipes drill pipe body, is integrally formed and is made, and is made up of inner tube and the outer tube being set in outside the inner tube；
Pin end, is connected with the first end of inner tube by friction welding；
Female joint, is connected with the second end of inner tube by friction welding.
2. welded formula double-wall drill pipe as claimed in claim 1, it is characterised in that described inner tube has centre bore, is
Double-wall drill pipe conveyed during the drilling of stratum the passage of scouring media.
3. welded formula double-wall drill pipe as claimed in claim 1, it is characterised in that formed between described outer tube and inner tube
Annular space, is the circulation canal that double-wall drill pipe carries out compressed air during the drilling of stratum.
4. welded formula double-wall drill pipe as claimed in claim 1, it is characterised in that also comprising pin end overcoat, be set in
The outside of pin end, is connected with the first end of outer tube by casing round thread.
5. welded formula double-wall drill pipe as claimed in claim 1, it is characterised in that also comprising female joint overcoat, be set in
The outside of female joint, is connected with the second end of outer tube by casing round thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621436868.7U CN206376758U (en) | 2016-12-26 | 2016-12-26 | Welded formula double-wall drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621436868.7U CN206376758U (en) | 2016-12-26 | 2016-12-26 | Welded formula double-wall drill pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206376758U true CN206376758U (en) | 2017-08-04 |
Family
ID=59408958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621436868.7U Expired - Fee Related CN206376758U (en) | 2016-12-26 | 2016-12-26 | Welded formula double-wall drill pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206376758U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724968A (en) * | 2017-10-24 | 2018-02-23 | 西华大学 | A kind of double-wall drill pipe Liqiud-gas mixing device |
| CN111456644A (en) * | 2020-04-10 | 2020-07-28 | 潘勇 | Petroleum drill pipe |
| CN113389499A (en) * | 2021-07-20 | 2021-09-14 | 中煤科工集团重庆研究院有限公司 | Double-wall drill rod and machining method thereof |
-
2016
- 2016-12-26 CN CN201621436868.7U patent/CN206376758U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724968A (en) * | 2017-10-24 | 2018-02-23 | 西华大学 | A kind of double-wall drill pipe Liqiud-gas mixing device |
| CN111456644A (en) * | 2020-04-10 | 2020-07-28 | 潘勇 | Petroleum drill pipe |
| CN111456644B (en) * | 2020-04-10 | 2021-12-14 | 杨林 | Petroleum drill pipe |
| CN113389499A (en) * | 2021-07-20 | 2021-09-14 | 中煤科工集团重庆研究院有限公司 | Double-wall drill rod and machining method thereof |
| CN113389499B (en) * | 2021-07-20 | 2024-03-22 | 中煤科工集团重庆研究院有限公司 | Double-wall drill rod and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170804 Termination date: 20191226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |