CN103375135A - Integrated concentric drill pipe - Google Patents
Integrated concentric drill pipe Download PDFInfo
- Publication number
- CN103375135A CN103375135A CN 201210123723 CN201210123723A CN103375135A CN 103375135 A CN103375135 A CN 103375135A CN 201210123723 CN201210123723 CN 201210123723 CN 201210123723 A CN201210123723 A CN 201210123723A CN 103375135 A CN103375135 A CN 103375135A
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- drill bit
- annular
- pipe
- bit
- annular bit
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Abstract
An integrated concentric drill pipe comprises a pipe boot, an annular drill bit and a guiding drill bit, wherein the pipe boot and the annular drill bit are of an integral structure, a key is arranged on the inner side of the annular drill bit, a groove is formed in the guiding drill bit, and the annular drill bit is connected with the guiding drill bit through the key and the groove. The integrated concentric drill pipe has the advantage that the pipe boot and the annular drill bit are of the integral structure, and the annular drill bit can be pulled out from a hole along with a sleeve and can be recycled, so that construction cost is greatly reduced; effective drilling area of the guiding drill bit is increased, and working efficiency is improved; the inner diameter of an annular drill can be effectively enlarged, and application range of the integrated concentric drill pipe is enlarged.
Description
Technical field
The present invention relates to a kind of drilling tool, be specifically related to a kind of integral type concentric simultaneous casing drilling tool.
Background technology
Advance with pipe bit with one heart that to advance the same with off-centre with pipe bit be to creep into the new drilling technology of technical of growing up at down-the-hole, be characterized in and can in complexity such as loose crushing and sandy gravel are difficult for the geology of pore-forming, successfully creep into, and effective pore-forming.
In recent years, play anchor cable, beat in the engineering such as underground heat and bring into use to concentric simultaneous casing drilling tool, reason is that concentric simultaneous casing drilling tool compares with eccentric drilling tool, becomes hole perpendicularity better, simple to operate, failure rate is low.Usefulness is a kind of split type concentric simultaneous casing drilling tool in the market, and its structure mainly is comprised of shoe a, annular bit b, starter c as shown in Figure 1, and this split type casing drilling tool has following disadvantage:
1, the annular bit utilization that can not repeat, an annular bit can only bore a hole, has caused very large waste;
2, the internal orifice dimension of annular bit is less than normal, causes the bit diameter that can pass through less than normal, has greatly restricted the boundary of works area of engineering; Usage range is little.
3, effective shock surface of starter is little, has reduced drilling efficiency.
Summary of the invention
Purpose of the present invention will provide a kind of annular bit reusable exactly, and the area that effectively creeps into of starter increases, high efficiency, the integral type concentric simultaneous casing drilling tool that cost is low.
The object of the present invention is achieved like this: the integral type concentric simultaneous casing drilling tool, comprise shoe, annular bit and starter, shoe and annular bit are integrated, the annular bit inboard is provided with key, starter is provided with groove, matches by key and groove between annular bit and the starter.End tooth adopts two toothrow structures before the annular bit.
Integral type concentric simultaneous casing drilling tool provided by the invention has following beneficial effect: because shoe and annular bit are integrated, annular bit can be mentioned from the hole with sleeve pipe, and the use that can repeat, and greatly reduces construction cost; Annular bit is take pre-structure as inner China and foreign countries three toothrow structures, be two toothrow structures now, increased the internal diameter of annular bit thereby external diameter is constant, therefore inserted of starter also increased, the area that effectively creeps into that is starter increases, and has improved operating efficiency; The annular bit internal diameter can effectively strengthen, and has strengthened its scope of application.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the concentric simultaneous casing drilling tool structural representation of prior art.
Fig. 2 is structural representation of the present invention.
The specific embodiment
Structure of the present invention is as shown in Figure 2: a kind of integral type concentric simultaneous casing drilling tool, comprise shoe 1, annular bit 3 and starter 2, shoe 1 and annular bit 2 are integrated, annular bit 3 inboards are provided with key, starter 2 is provided with groove, by key and groove fit, starter 2 can drive annular bit 3 and rotate together between annular bit 3 and the starter 2.The other end of shoe 1 is provided with screw thread, directly links to each other with sleeve pipe during work.Annular bit 3 front end teeth 4 adopt two toothrow structures.
Job step of the present invention is as follows:
1. when starting working, center bit drives annular bit 3 and creeps into downwards, also drives with pipe and shoe 1 simultaneously and follows up downwards.
2. arrive basement rock and advance, the counter-rotating drill bit is center bit proposed annular bit 3 and stay the hole from the hole at the bottom of.
3. marginal not slurry limit will be extracted at the bottom of the hole together with annular bit 3 with pipe.
Claims (2)
1. integral type concentric simultaneous casing drilling tool, comprise shoe (1), annular bit (3) and starter (2), it is characterized in that: shoe (1) and annular bit (3) are integrated, annular bit (3) inboard is provided with key, starter (2) is provided with groove, matches by key and groove between annular bit (3) and the starter (2).
2. integral type concentric simultaneous casing drilling tool according to claim 1 is characterized in that: the front end tooth of annular bit (3) (4) employing two toothrow structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210123723 CN103375135A (en) | 2012-04-25 | 2012-04-25 | Integrated concentric drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210123723 CN103375135A (en) | 2012-04-25 | 2012-04-25 | Integrated concentric drill pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103375135A true CN103375135A (en) | 2013-10-30 |
Family
ID=49460915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210123723 Pending CN103375135A (en) | 2012-04-25 | 2012-04-25 | Integrated concentric drill pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103375135A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453707A (en) * | 2014-12-15 | 2015-03-25 | 中煤科工集团西安研究院有限公司 | Forming device and method of underground large-diameter horizontal rescue borehole for mine accidents |
| CN106014352A (en) * | 2016-05-18 | 2016-10-12 | 中煤科工集团西安研究院有限公司 | Tube following sieve tube feeding device outside coal mine underground drill pipe and construction method thereof |
| CN110439467A (en) * | 2019-07-30 | 2019-11-12 | 长沙天和钻具机械有限公司 | A kind of reaming block formula concentric simultaneous casing drilling tool |
-
2012
- 2012-04-25 CN CN 201210123723 patent/CN103375135A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453707A (en) * | 2014-12-15 | 2015-03-25 | 中煤科工集团西安研究院有限公司 | Forming device and method of underground large-diameter horizontal rescue borehole for mine accidents |
| CN106014352A (en) * | 2016-05-18 | 2016-10-12 | 中煤科工集团西安研究院有限公司 | Tube following sieve tube feeding device outside coal mine underground drill pipe and construction method thereof |
| CN110439467A (en) * | 2019-07-30 | 2019-11-12 | 长沙天和钻具机械有限公司 | A kind of reaming block formula concentric simultaneous casing drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131030 |