CN103835655A - Low-resistance PDC drill bit - Google Patents
Low-resistance PDC drill bit Download PDFInfo
- Publication number
- CN103835655A CN103835655A CN201410069879.5A CN201410069879A CN103835655A CN 103835655 A CN103835655 A CN 103835655A CN 201410069879 A CN201410069879 A CN 201410069879A CN 103835655 A CN103835655 A CN 103835655A
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- China
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- tooth row
- drill bit
- cutting tooth
- cutting
- pdc drill
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Abstract
The invention discloses a low-resistance PDC drill bit which comprises a drill bit body, a spray nozzle, six blade wings on the drill bit body and fragment discharging grooves located among the blade wings. A first cutting tooth row and a second cutting tooth row are arranged on each blade wing, and each of the first cutting tooth row and the second cutting tooth row comprises four cutting teeth. The low-resistance PDC drill bit has the advantages that rock fragments are smoothly discharged in the drilling process and have small resistance on the drill bit.
Description
Technical field
The present invention relates to petroleum geology drilling technology field, specifically, relate to a kind of lower resistance PDC drill bit.
Background technology
Existing PDC drill bit is creeping into soil layer, when drill bit is in the time creeping at a high speed, and because the landwaste that cutting teeth produces is more, the accumulation that easily produces landwaste.Existing PDC drill bit, it adopts the operator wing and secondary wing respectively cutting teeth to be arranged, and this structure makes a lot of wings need to be set, and the chip area between wing is restricted, and the discharge of landwaste is restricted.Because the discharge of landwaste is not smooth, the resistance that drill bit is subject in the time creeping into is increased, affect the speed that drill bit creeps into, and landwaste and drill bit constantly rub, the wing to drill bit and the behavior in service of cutting teeth can cause and have a strong impact on.And existing PDC drill bit, in order to reach rate of penetration faster, the quantity of its cutting teeth is more, landwaste smear metal speed is fast, due to the structure of drill bit arrange improper, make landwaste discharge be obstructed, make cutting teeth creep into resistance increase, rate of penetration is obstructed.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of lower resistance PDC drill bit.
The present invention addresses the above problem adopted technical scheme:
A kind of lower resistance PDC drill bit, comprise 6 wings and the chip area between adjacent two wings on bit body, nozzle, bit body, on described wing, be provided with the first cutting tooth row and the second cutting tooth row, the first described cutting tooth row and the second cutting tooth row all comprise 4 cutting teeths.
As preferably, the first described cutting tooth row is different with the proud exposure of the second cutting tooth row.
Further, the first described cutting teeth parallelism second cuts the high 0.7-1.3 centimetre of exposure of tooth row.
As preferably, on the first cutting tooth row and the second cutting tooth row, the diameter of cutting teeth is 15 millimeters.
To sum up, the invention has the beneficial effects as follows:
1, the present invention arranges two row's cutting teeths on wing, makes the width of chip area between the increase wing of wing, has increased the speed that landwaste is discharged.
2, of the present invention 8 cutting teeths are set respectively on 6 wings, adopt while this structure of two row's cutting teeths being set on a wing, the speed that the speed of cutting teeth cutting landwaste is discharged with landwaste is consistent, avoids the accumulation of landwaste, reduces the creep into resistance of landwaste to drill bit.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Mark and corresponding component title in accompanying drawing: 1, bit body; 2, wing; 3, the first cutting tooth row; 4, the second cutting tooth row; 5, chip area; 6, nozzle.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is done to detailed description further, but embodiments of the present invention are not limited to this.
Embodiment 1:
A kind of lower resistance PDC drill bit, comprise 6 wings 2 and the chip area 5 between adjacent two wings 2 on bit body 1, nozzle 6, bit body 1, on described wing 2, be provided with the first cutting tooth row 3 and the second cutting tooth row 4, the first described cutting tooth row 3 and the second cutting tooth row 4 all comprise 4 cutting teeths.
In the present embodiment, the operator wing and secondary wing are integrated, owing to having reduced the width of a cutting teeth and wing side, can reduce the width of wing, be the width of the wing in this programme be less than the operator wing and secondary wing width and, increased the width of chip area, the width of chip area increases, and the speed that landwaste is discharged speeds.Adopt the wing structure of this scheme, while adopting 48 cutting teeths through a large amount of experiment showed,, the speed of smear metal landwaste is consistent with the speed that landwaste is discharged, and landwaste can not piled up in chip area, and landwaste is reduced the resistance creeping into.For the landwaste amount that each chip area is discharged is suitable, cutting teeth should evenly arrange, and the first cutting tooth row 3 and the second cutting tooth row 4 are provided with 4 cutting teeths.Experiment showed, that this structure is rational structure, is also best structure.
Embodiment 2:
The present embodiment and embodiment 1 are roughly the same, and in order to make drill bit adapt to different geological stratifications, difference is: the first described cutting tooth row 3 is different with the proud exposure of the second cutting tooth row 4.Utilize the proud exposure difference of cutting teeth, make the technical scheme of the present embodiment can adapt to different geological stratifications, be not only applicable to soft geological layer, be also applicable to hard interbedded layer.
For the anti-impact force that makes drill bit strengthens, the high 0.7-1.3 centimetre of exposure of the first described cutting tooth row 3 to the second cutting tooth rows 4.
Embodiment 3:
The present embodiment and above-described embodiment are roughly the same, and difference is: on the first cutting tooth row 3 and the second cutting tooth row 4, the diameter of cutting teeth is 15 millimeters.Cutting teeth is in the time of smear metal, and the diameter of cutting teeth is larger, and its smear metal speed is faster, in the time that smear metal speed exceedes the landwaste velocity of discharge, easily causes the obstruction of landwaste, and in the time that the diameter of cutting teeth is 15 millimeters, the speed of smear metal landwaste is the most suitable.
As mentioned above, can realize preferably the present invention.
Claims (4)
1. a lower resistance PDC drill bit, it is characterized in that: comprise 6 wings (2) on bit body (1), nozzle (6), bit body (1) and be positioned at the chip area (5) between adjacent two wings (2), on described wing (2), be provided with the first cutting tooth row (3) and the second cutting tooth row (4), described the first cutting tooth row (3) and the second cutting tooth row (4) all comprise 4 cutting teeths.
2. a kind of lower resistance PDC drill bit according to claim 1, is characterized in that: the first described cutting tooth row (3) is different with the proud exposure of the second cutting tooth row (4).
3. a kind of lower resistance PDC drill bit according to claim 1 and 2, is characterized in that: the first described cutting tooth row (3) is than the high 0.7-1.3 centimetre of exposure of the second cutting tooth row (4).
4. a kind of lower resistance PDC drill bit according to claim 1, is characterized in that: the diameter of the first cutting tooth row (3) and the upper cutting teeth of the second cutting tooth row (4) is 15 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410069879.5A CN103835655A (en) | 2014-02-28 | 2014-02-28 | Low-resistance PDC drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410069879.5A CN103835655A (en) | 2014-02-28 | 2014-02-28 | Low-resistance PDC drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103835655A true CN103835655A (en) | 2014-06-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410069879.5A Pending CN103835655A (en) | 2014-02-28 | 2014-02-28 | Low-resistance PDC drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103835655A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196460A (en) * | 2014-08-25 | 2014-12-10 | 江苏长城石油装备制造有限公司 | Rotary combined type PDC drill bit for natural gas rock core drilling |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201027494Y (en) * | 2007-05-30 | 2008-02-27 | 武汉亿斯达工具有限公司 | Impact resistant diamond drill head |
| US20080105466A1 (en) * | 2006-10-02 | 2008-05-08 | Hoffmaster Carl M | Drag Bits with Dropping Tendencies and Methods for Making the Same |
| CN102409980A (en) * | 2011-12-22 | 2012-04-11 | 河南神龙石油钻具有限公司 | Blade type PDC (Polycrystalline Diamond Compact) drill bit |
| US20120152623A1 (en) * | 2010-12-15 | 2012-06-21 | Shilin Chen | Pdc bits with cutters laid out in both spiral directions of bit rotation |
| CN203097722U (en) * | 2013-01-21 | 2013-07-31 | 青岛石大华通科技有限公司 | Tapered gauge PDC drill bit |
| CN203362042U (en) * | 2013-07-16 | 2013-12-25 | 江汉石油钻头股份有限公司 | Polycrystalline diamond compact (PDC) drill bit with low drilling resistance |
| CN203742456U (en) * | 2014-02-28 | 2014-07-30 | 成都大漠石油机械有限公司 | Low-resistance PDC drill bit |
-
2014
- 2014-02-28 CN CN201410069879.5A patent/CN103835655A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080105466A1 (en) * | 2006-10-02 | 2008-05-08 | Hoffmaster Carl M | Drag Bits with Dropping Tendencies and Methods for Making the Same |
| CN201027494Y (en) * | 2007-05-30 | 2008-02-27 | 武汉亿斯达工具有限公司 | Impact resistant diamond drill head |
| US20120152623A1 (en) * | 2010-12-15 | 2012-06-21 | Shilin Chen | Pdc bits with cutters laid out in both spiral directions of bit rotation |
| CN102409980A (en) * | 2011-12-22 | 2012-04-11 | 河南神龙石油钻具有限公司 | Blade type PDC (Polycrystalline Diamond Compact) drill bit |
| CN203097722U (en) * | 2013-01-21 | 2013-07-31 | 青岛石大华通科技有限公司 | Tapered gauge PDC drill bit |
| CN203362042U (en) * | 2013-07-16 | 2013-12-25 | 江汉石油钻头股份有限公司 | Polycrystalline diamond compact (PDC) drill bit with low drilling resistance |
| CN203742456U (en) * | 2014-02-28 | 2014-07-30 | 成都大漠石油机械有限公司 | Low-resistance PDC drill bit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196460A (en) * | 2014-08-25 | 2014-12-10 | 江苏长城石油装备制造有限公司 | Rotary combined type PDC drill bit for natural gas rock core drilling |
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Application publication date: 20140604 |