CN101408092A - Rear inclined circular angle-shaped spiral drag bit - Google Patents
Rear inclined circular angle-shaped spiral drag bit Download PDFInfo
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- CN101408092A CN101408092A CNA2008101808706A CN200810180870A CN101408092A CN 101408092 A CN101408092 A CN 101408092A CN A2008101808706 A CNA2008101808706 A CN A2008101808706A CN 200810180870 A CN200810180870 A CN 200810180870A CN 101408092 A CN101408092 A CN 101408092A
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Abstract
The invention relates to a back-tilting round screw scraper bit and mainly solves the problems that the existing common screw scraper bit has larger wear to the bit after drilling, and the bit has large torque and poor stability. The back-tilting round screw scraper bit is characterized in that: the cutting surface of the bit of a bit scraper blade (3) is tilted backward and the range of a formed cutting angle (Alpha) is between 0 degree to 90 degrees; and the side cutting surface of the bit scraper blade (3) adds a cutting angle which is called as a cutting angle (Beta) of the gauge protection of the bit and ranges between 0 degree to 45 degrees. The back-tilting round screw scraper bit changes the traditional cutting mode and has the characteristics of small torque, strong stability and high wearing resistance. When being used for drilling, the bit has high drilling footage, fast drilling speed and the functions of repairing the wall of a well and preventing the well from being inclined, can reduce the cost of drilling and has obvious economic benefit and social benefit.
Description
Technical field:
The present invention relates to a kind of drill and petroleum extraction tools in the drilling well field, top layer, oil field, relate to a kind of drag bit that is used for direct fractured rock, drills the rock stratum specifically.
Background technology:
In drilling well field, top layer, oil field, helical drag bit is used more extensive.But through use back discovery for a long time, there is following shortcoming in this common helical drag bit: this drill bit mainly comes broken formation in the mode of cutting, shearing in drilling process, wearing and tearing to drill bit are bigger, and, in drilling process, the moment of torsion of drill bit is big, poor stability.
Summary of the invention:
Bigger in order to solve existing common helical drag bit wearing and tearing to drill bit after drilling well, and the moment of torsion of drill bit is big, the problem of poor stability, the invention provides a kind of rear inclined circular angle-shaped spiral drag bit, this kind rear inclined circular angle-shaped spiral drag bit has changed traditional cutting way, has the advantages that moment of torsion is little, stability is strong, abrasion resistance is high.Use this drill bit drilling well, footage per bit height, drilling speed are fast, except that the function with finishing borehole wall, can also prevent the generation of hole deviation.Can reduce drilling cost, have tangible economic benefit and social benefit.
Technical scheme of the present invention is: this kind rear inclined circular angle-shaped spiral drag bit, comprise bit body, drill bit cap, bit nozzle, drill bit flight and bit sheet, the bit cutting face hypsokinesis of wherein said bit sheet, the cutting angle scope that forms is between 0 degree～90 degree, the side cut face of described bit sheet increases a cutting angle, be called the bit gauge protection cutting angle, its scope is between 0 degree～45 degree.In addition, be the rounding structure in the upper end of described bit sheet outer rim, its chamfer radius R is between 0～100 millimeter.Simultaneously, the upper surface introversion of bit sheet forms a drill bit leaning angle, and the scope of described drill bit leaning angle is between 0 degree～45 degree.
The present invention has following beneficial effect: owing to take such scheme, this kind rear inclined circular angle-shaped spiral drag bit is with scraping and scrape crowded mode broken formation, its bit cutting face hypsokinesis, drill bit side cut face has increased the cutting angle simultaneously, and the wing outer rim adopts the rounding design, and drill bit moment of torsion in drilling process is reduced, and has increased the stability of drill bit, reduce the destruction and the wearing and tearing of wing, made footage per bit be greatly enhanced.And this bit sheet adopts the leaning angle structure, makes in the drill bit drilling process, prevents the generation of hole deviation.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a vertical view of the present invention.
1-bit nozzle among the figure, 2-drill bit cap, 3-bit sheet, 4-drill bit flight, 5-bit body.
The specific embodiment:
Below in conjunction with accompanying drawing invention is described further:
In conjunction with shown in Figure 2, this kind rear inclined circular angle-shaped spiral drag bit comprises bit body 5, drill bit cap 2, bit nozzle 1, drill bit flight 4 and bit sheet 3 by Fig. 1.The bit cutting face hypsokinesis of wherein said bit sheet 3, the cutting angle α scope that forms is between 0 degree～90 degree, the side cut face of described bit sheet 3 increases a cutting angle, be called bit gauge protection cutting angle β, its scope is between 0 degree～45 degree, like this, can increase the drill bit abrasion resistance, reduce the button square.
More than, be basic scheme of the present invention, provide 2 of the present invention below and optimize embodiment:
At first, can on the basis of such scheme, improve, promptly as shown in Figure 1, the upper end outer rim of described bit sheet 3 is designed to the rounding structure original bit sheet 3, its chamfer radius R is between 0～100mm, thereby it is stressed to reduce the bit sheet.
Secondly, as shown in Figure 1, can make the upper surface introversion of described bit sheet 3, form a drill bit leaning angle θ, the scope of described drill bit leaning angle θ is spent between～45 degree 0, thereby the stability of drill bit is increased.
In a word, use the present invention, this kind rear inclined circular angle-shaped spiral drag bit is with scraping and scrape crowded mode broken formation, its bit cutting face hypsokinesis, drill bit side cut face has increased the cutting angle simultaneously, and the wing outer rim adopts the rounding design, drill bit button square in drilling process is reduced, increase the stability of drill bit, reduced the destruction and the wearing and tearing of wing, made footage per bit be greatly enhanced.And this bit sheet adopts the leaning angle structure, makes in the drill bit drilling process, prevents the generation of hole deviation.Based on above-mentioned plurality of advantages, the present invention is very suitable for applying in drilling well field, top layer, oil field.
Claims (3)
1, a kind of rear inclined circular angle-shaped spiral drag bit, comprise bit body (5), drill bit cap (2), bit nozzle (1), drill bit flight (4) and bit sheet (3), it is characterized in that: the bit cutting face hypsokinesis of described bit sheet (3), cutting angle (α) scope that forms is between 0 degree～90 degree, the side cut face of described bit sheet (3) increases a cutting angle, be called bit gauge protection cutting angle (β), its scope is between 0 degree～45 degree.
2, rear inclined circular angle-shaped spiral drag bit according to claim 1 is characterized in that: the upper end outer rim of described bit sheet (3) is the rounding structure, and its chamfer radius (R) is between 0～100 millimeter.
3, rear inclined circular angle-shaped spiral drag bit according to claim 1 and 2 is characterized in that: the upper surface introversion of described bit sheet (3), form a drill bit leaning angle (θ), and the scope of described drill bit leaning angle (θ) is between 0 degree～45 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101808706A CN101408092A (en) | 2008-11-26 | 2008-11-26 | Rear inclined circular angle-shaped spiral drag bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101808706A CN101408092A (en) | 2008-11-26 | 2008-11-26 | Rear inclined circular angle-shaped spiral drag bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101408092A true CN101408092A (en) | 2009-04-15 |
Family
ID=40571275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101808706A Pending CN101408092A (en) | 2008-11-26 | 2008-11-26 | Rear inclined circular angle-shaped spiral drag bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101408092A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060943A (en) * | 2014-04-11 | 2014-09-24 | 江苏长城石油装备制造有限公司 | Drill bit for screw drill tool |
| CN114776225A (en) * | 2022-02-28 | 2022-07-22 | 中国铁建重工集团股份有限公司 | Anti-slide pile drilling machine equipment and drill bit |
-
2008
- 2008-11-26 CN CNA2008101808706A patent/CN101408092A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060943A (en) * | 2014-04-11 | 2014-09-24 | 江苏长城石油装备制造有限公司 | Drill bit for screw drill tool |
| CN114776225A (en) * | 2022-02-28 | 2022-07-22 | 中国铁建重工集团股份有限公司 | Anti-slide pile drilling machine equipment and drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090415 |