CN206987734U - The PDC cone teeth drill bits of shaft bottom all standing - Google Patents
The PDC cone teeth drill bits of shaft bottom all standing Download PDFInfo
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- CN206987734U CN206987734U CN201720883615.2U CN201720883615U CN206987734U CN 206987734 U CN206987734 U CN 206987734U CN 201720883615 U CN201720883615 U CN 201720883615U CN 206987734 U CN206987734 U CN 206987734U
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- wing
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- shaft bottom
- taper
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Abstract
The utility model discloses a kind of PDC of shaft bottom all standing to bore teeth drill bit, includes the wing of drill bit, is provided with toothrow before several cylindrical composite pieces are formed on each wing, and taper PDC composite sheets are provided with close to the position of drill bit center portion on the wing.This drill bit improves the cutting speed of drill bit, improves its impact resistance, play the cutting power of cylindrical composite piece and carry out surge protection to it, improve the efficiency of drill bit, realize all standing in shaft bottom by improving the positions of taper PDC composite sheets.
Description
Technical field
It the utility model is related to a kind of oil drilling tool, and in particular to a kind of PDC cone teeth drill bits of shaft bottom all standing.
Background technology
PDC taper composite sheet teeth, strong shock resistance good with its wearability, have started to be used in oil drilling work journey
On drill bit, on the PDC cone teeth drill bits used at present, taper PDC composite sheets are arranged in the toothrow position of bit shoulder two mostly, such as
Fig. 1, its reason are：
1. bit shoulder cutwork amount is big, PDC composite sheets are easily damaged, and make the first toothrow, circle with cylindrical composite piece
Taper composite sheet makees two toothrows, is advantageous to strengthen the wearability and impact resistance of bit shoulder；
2. bit shoulder wing is thick, easily two toothrows of increase, and drill bit center portion (near drill bit axial line), by mud runner
Large scale limits, and wing can not fill two toothrows than relatively thin.This two toothrows drill bit, it bores the cut that tooth is formed to bottom rock
Coverage condition is as shown in Fig. 2 the center portion thereof point is blank.
From the point of view of boring teeth drill bit service condition from current each department, although having changed than full cylinder compact bit effect
It is kind, but because center portion is provided with conical tooth, cylindrical composite piece is low in drill bit center portion cutting speed, and impact resistance is not strong, not only
The cutting power of cylindrical composite piece can not be played, be easily hit damage on the contrary, influences drill bit efficiency.
Utility model content
Technical problem to be solved in the utility model is that the arrangement of existing drill bit wing cutting tooth causes drill bit
Center portion cutting speed is low, and impact resistance is not strong, can not only play the cutting power of cylindrical composite piece, easily be rushed on the contrary
Damage is hit, influences drill bit efficiency, its object is to the PDC for providing a kind of shaft bottom all standing to bore teeth drill bit, and this drill bit is by changing
Enter the position of taper PDC composite sheets, improve the cutting speed of drill bit, improve its impact resistance, play cylindrical composite
The cutting power of piece and surge protection is carried out to it, improve the efficiency of drill bit, realize all standing in shaft bottom.
The utility model is achieved through the following technical solutions：
The PDC cone teeth drill bits of shaft bottom all standing, include the wing of drill bit, several cylinders are provided with each wing
Toothrow before shape composite sheet is formed, taper PDC composite sheets are provided with close to the position of drill bit center portion on the wing.At present for
For the drill bit of oil drilling, cylindrical composite piece and taper PDC composite sheets are all existing structure, wherein cylindrical composite in itself
Piece mainly plays shear action, and taper PDC composite sheets play scraping action, and PDC taper composite sheet teeth are good with its wearability, shock resistance energy
Power extensive use by force, but on the PDC cone teeth drill bits used at present, taper PDC composite sheets are arranged in bit shoulder two mostly
Toothrow position, in shoulder above position, due to structure qualification, taper PDC composite sheets are not arranged, and be only provided with cylinder
Shape composite sheet is cut, and drill bit axial line is nearby referred to as drill bit center portion, is limited by mud runner large scale, and wing does not have than relatively thin
There are installation taper PDC composite sheets, as shown in Figure 1.Tooth is bored which results in its below shoulder and shoulder to form bottom rock
Cut coverage condition as shown in Fig. 2 the center portion thereof point is blank.This arrangement causes drill bit center portion cutting speed low,
Impact resistance is not strong, can not only play the cutting power of cylindrical composite piece, and be easily hit damage on the contrary, influences drill bit
Efficiency, and this programme is then the position by improving taper PDC composite sheets, it is equal close to the position of drill bit center portion on wing
It is provided with taper PDC composite sheets so that cone tooth can be formed to be covered to the cut of rock at the center of shaft bottom, can so improve brill
The cutting speed of head, its impact resistance is improved, plays the cutting power of cylindrical composite piece and surge protection is carried out to it,
Improve the efficiency of drill bit.
All standing and high efficiency during in order to realize scraping, the taper PDC composite sheets that will be close to drill bit center portion are not arranged in together
On one circumference.The track of so all taper PDC composite sheet scrapings is different, forms all coverings, is formed to bottom rock more
Bump contact.
Individually the taper PDC composite sheets by drill bit center portion can not realize all standing to shaft bottom, and it is only by shaft bottom
Rock covering at center, is then that several tapers PDC composite sheets are being set on each wing to realize that coverage rate is wider
Toothrow after composition, and rear toothrow is arranged on the shoulder above position of wing, and each direction of rotation heel row of the wing along drill bit
The rear of toothrow before tooth is arranged on.Realize and taper PDC composite sheets are formed into comprehensive setting to wing along wing, with
The rotation of drill bit, all standing to shaft bottom is realized, due to size, more than wing shoulder gradual thinning, existing cylinder
Shape composite sheet occupies space substantially can not install taper PDC composite sheets, and the utility model is by by the front row in each wing
Tooth position is gradually reduced in wing shoulder above section according to wing by the length of thick thinning direction cylinder composite sheet, is so done
Although preceding toothrow intensity, which has weakened, can't but influence too much, increased heel row cone tooth can carry drill bit overall performance
It is high, it is possible to increase the service life and drilling efficiency of drill bit.
Near drill bit center portion, because wing is too thin, it is impossible to install two toothrows, then suitably substitute partial cylinder with conical tooth
Shape tooth, its principle are：Cylin-drical tooth and conical tooth can form uniform fold to shaft bottom core.
The utility model compared with prior art, has the following advantages and advantages：This drill bit is bored by improving
The position of shape PDC composite sheets, the cutting speed of drill bit is improved, improve its impact resistance, play cylindrical composite piece
Cutting power and surge protection is carried out to it, improve the efficiency of drill bit, realize all standing in shaft bottom.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, the restriction to the utility model embodiment is not formed.In the accompanying drawings：
Fig. 1 is the arrangement schematic diagram of existing drill bit wing cutting tooth；
Fig. 2 is that the cut of existing drill bit wing taper cutting tooth covers schematic diagram；
Fig. 3 is the arrangement schematic diagram of cutting tooth of the present utility model；
Fig. 4 is that the cut of cylindrical composite piece of the present utility model covers schematic diagram；
Fig. 5 is that the cut of taper PDC composite sheets of the present utility model covers schematic diagram.
Mark and corresponding parts title in accompanying drawing：
Two row's taper PDC composite sheets on 1- wings, 2- wings, 3- cylindrical composite pieces, 4- center portion taper PDC composite sheets.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, it is not intended as to restriction of the present utility model.
Embodiment 1：
As shown in Fig. 3, Fig. 4, Fig. 5, the PDC of shaft bottom all standing bores teeth drill bit, includes the wing 2 of drill bit, has on drill bit more
Individual wing, several cylindrical composite pieces 3 are provided with each wing 2 and form preceding toothrow, these edges of cylindrical composite piece 3
The formation for wing 2 is set, and it mainly plays scraping action in drilling well, but because drill bit center portion cutting speed is low, cylinder
Shape composite sheet scraping efficiency is very low, and impact resistance is not strong, can not only play the cutting power of cylindrical composite piece, hold on the contrary
Easily be hit damage, influences drill bit efficiency, on the other hand, the present embodiment is equal close to the position of drill bit center portion on each wing 2 of drill bit
Taper PDC composite sheets are provided with, form shaft bottom center uniform fold, and taper PDC composite sheets are arranged on non-same circle
Zhou Shang.For the ease of description, the taper PDC composite sheets for being arranged on drill bit center portion position are named as center portion taper PDC composite sheets
4, when carrying out drilling well, rock top center is drawn using the center portion taper PDC composite sheets 4 close to the position of drill bit center portion
Wound, cylindrical composite 3 scraping efficiencies of piece are higher during such drilling well, while its impulsive force for being subject to is small and be hardly damaged, work effect
Rate is higher.
Embodiment 2：
As shown in Fig. 3, Fig. 4, Fig. 5, on the basis of embodiment 1, also several tapers are provided with each wing 2
Toothrow after PDC composite sheets are formed, and rear toothrow is arranged on the shoulder above position of wing 2, and each rotation of the wing 2 along drill bit
Turn the rear of toothrow before toothrow behind direction is arranged on.For convenience of description, the taper of the shoulder above position of wing 2 will be arranged on
PDC composite sheets are named as two row taper PDC composite sheets 1 on wing, are actually provided with itself below the shoulder of wing some
Toothrow after individual taper PDC composite sheets are formed as shown in figure 1, still its due to set location, cause can not be to the close of bottom rock
Scraping is carried out at center, its cut track can not play cylindrical composite as shown in Fig. 2 in the presence of very big clear area, during drilling well
The cutting power of piece, be easily hit damage on the contrary, influences drill bit efficiency, the present embodiment be then by wing 2 shoulder with
Upper install is equipped with several wings toothrow after two row taper PDC composite sheets 1 are formed, hereafter toothrow and rear toothrow company before
Set after connecing along the track of wing, be incorporated in the center portion taper PDC composite sheets 4 of center portion setting, form all standing to shaft bottom,
The shock resistance feature of taper cutting tooth can be more fully played, so as to reach the mesh for improving drilling life of bit and drilling efficiency
's.
Front-seat tooth position in each wing 2 is cylindrical by thick thinning direction according to wing 2 in the shoulder above section of wing 2
The length of composite sheet 3 is gradually reduced, and is to be changed toothrow before plain cylindrical form PDC by thick thinning crossover position in each wing
For thin type cylinder PDC composite sheets, and increase by two row taper PDC composite sheets 1 on wing behind it, although so doing front row
Tooth intensity has weakened, but increased heel row cone tooth can improve drill bit overall performance.
Or by the very thin place that can not add two toothrows of bit central part wing, covered according to shaft bottom uniform former
Then, the cylindrical cuts tooth of the half in single cylindrical cuts tooth or so is changed to two row's taper PDC composite sheets on wing
1, all standing scuffing is carried out with single conical tooth.
Change latter two cutting tooth shaft bottom coverage condition as shown in Figure 4, Figure 5.As can be seen from the figure Cylinder Gear shaft bottom is covered
The core coverage density of lid figure has been reduced, but the core of conical tooth shaft bottom covering does not have blank, thus can be with
The shock resistance feature of taper cutting tooth is more fully played, so as to reach the purpose for improving drilling life of bit and drilling efficiency.
Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered
One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (2)
1. the PDC cone teeth drill bits of shaft bottom all standing, include the wing of drill bit（2）, in each wing（2）On be provided with several
Cylindrical composite piece（3）Toothrow before composition, it is characterised in that the wing（2）The upper position close to drill bit center portion is provided with
Taper PDC composite sheets；Also include being arranged on each wing（2）On several tapers PDC composite sheets form after toothrow, and heel row
Tooth is arranged on wing（2）Shoulder above position, and each wing（2）Toothrow is arranged on front row after along the direction of rotation of drill bit
The rear of tooth；Each wing（2）In front-seat tooth position in wing（2）Shoulder above section is according to wing（2）By thick thinning
Direction cylinder composite sheet（3）Length be gradually reduced.
2. the PDC cone teeth drill bits of shaft bottom all standing according to claim 1, it is characterised in that the taper PDC composite sheets
It is arranged on non-same circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720883615.2U CN206987734U (en) | 2017-07-20 | 2017-07-20 | The PDC cone teeth drill bits of shaft bottom all standing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720883615.2U CN206987734U (en) | 2017-07-20 | 2017-07-20 | The PDC cone teeth drill bits of shaft bottom all standing |
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| Publication Number | Publication Date |
|---|---|
| CN206987734U true CN206987734U (en) | 2018-02-09 |
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ID=61415532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720883615.2U Active CN206987734U (en) | 2017-07-20 | 2017-07-20 | The PDC cone teeth drill bits of shaft bottom all standing |
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| Country | Link |
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| CN (1) | CN206987734U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145242A (en) * | 2018-02-11 | 2019-08-20 | 中石化石油工程技术服务有限公司 | One kind having taper auxiliary cutting element PDC drill bit |
| CN114184502A (en) * | 2022-02-15 | 2022-03-15 | 西南石油大学 | PDC micro-drill bit, rock drillability testing device and method |
-
2017
- 2017-07-20 CN CN201720883615.2U patent/CN206987734U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145242A (en) * | 2018-02-11 | 2019-08-20 | 中石化石油工程技术服务有限公司 | One kind having taper auxiliary cutting element PDC drill bit |
| CN114184502A (en) * | 2022-02-15 | 2022-03-15 | 西南石油大学 | PDC micro-drill bit, rock drillability testing device and method |
| CN114184502B (en) * | 2022-02-15 | 2022-05-20 | 西南石油大学 | PDC micro-drill bit, rock drillability testing device and method |
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