CN204782782U - Circle, mixed tooth PDC drill bit of wedge - Google Patents
Circle, mixed tooth PDC drill bit of wedge Download PDFInfo
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- CN204782782U CN204782782U CN201520407123.7U CN201520407123U CN204782782U CN 204782782 U CN204782782 U CN 204782782U CN 201520407123 U CN201520407123 U CN 201520407123U CN 204782782 U CN204782782 U CN 204782782U
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- tooth
- wedge
- drill bit
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- pdc drill
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Abstract
The utility model discloses a circle, mixed tooth PDC drill bit of wedge, including bit body and wing, its characterized in that wing surface is equipped with conisphere wedge -shaped tooth and round tooth, conisphere wedge -shaped tooth includes tooth post and crown, the crown comprises toper crown base and two scarfs that correspond to set up, and two scarfs upper ends cross with the tooth top, its characterized in that, the tooth top by one section outer convex curve around two scarfs of an axis rotation of cutting and the surface of revolution that constitutes, circular arc chamfering is passed through to the upper end of toper crown base and addendum face joins. The PDC drill bit that this kind of mixture was arranged, in stratum such as hard moulding mud stone, limestone, conisphere wedge -shaped tooth wedging stratum in advance reaches rock breakage in advance, releases partly stress, and circular PDC tooth is scraped afterwards to the realization increases substantially the mesh of mechanical drilling speed in above -mentioned stratum.
Description
Technical field
The utility model relates to a kind of circle, wedge combination tooth PDC drill bit for field drilling wells such as oil, geology, collieries.
Background technology
The stratum that PDC drill bit is suitable for is soft-medium ground, but due in recent years to the requirement of drilling speed, to PDC drill bit the stratum that is suitable for it is also proposed higher demand, for stratum such as picture deep-well fine and close hard plastic shale, argillaceous limestone, limestones, roller bit cutting rate of penetration is on the low side, and conventional PDC composite sheet is difficult to wedging stratum, and both rate of penetrations are suitable, therefore, creeping into of this kind of stratum is the technical barrier perplexing drilling well always.For the speed-raising problem on this kind of stratum, its Research Significance also just becomes particularly important.
Utility model content
Technical problem to be solved in the utility model is that the deficiency existed for above-mentioned prior art provides a kind of and is easy to wedging stratum, the circle that can improve stock-removing efficiency, wedge combination tooth PDC drill bit.
The technical scheme that the utility model adopts is: Yi Zhongyuan, wedge combination tooth PDC drill bit, comprise bit body and wing, it is characterized in that blade surface is provided with conisphere chisel teeth and round tooth, described conisphere chisel teeth comprises tooth post and crown, described crown is made up of taper crown base and corresponding two wedge surfaces arranged, two wedge surface upper ends and tooth top cross, it is characterized in that, the surface of revolution that tooth top is made up of around axis circumgyration incision two wedge surface one section of convex outer curve, the upper end of taper crown base is joined by circular arc chamfering and crest top land.
By technique scheme, the proud exposure of described conisphere chisel teeth opposing circular tooth is 0.5-3mm.
By technique scheme, the wedge shaped features of conisphere wedge shape PDC tooth is towards identical with circular PDC tooth cutting direction.
By technique scheme, conisphere chisel teeth and round tooth are that same row arranges or arranges with the setting of row's different rail or the different rail of different rows.
By technique scheme, described two wedge surfaces are symmetrical arranged.
By technique scheme, described wedge surface is plane.
By technique scheme, the angular range of two wedge surfaces is 90 °-114 °.
By technique scheme, the curve of described surface of revolution is circular arc, and its arc radius is 0.5-2mm, and straight length is 0.1-1mm, and taper crown base (composite bed thickness) thickness is 4-6mm.
By technique scheme, taper crown base is made up of the conical surface that left and right two cone angles are identical, two conical surfaces are equal with the circular arc chamfering radius that crest top land is connected, and circular arc chamfering radius is 1-2mm, and the angular range of rectilinear generatrix in same cross section of two conical surfaces is 80 °-114 °.
Beneficial effect acquired by the utility model is: the PDC drill bit of this mixed-arrangement, in the stratum such as hard plastic shape mud stone, limestone, conisphere chisel teeth in advance wedging stratum reaches rock precracking, discharge a part of stress, circular PDC tooth carries out scraping subsequently, thus realizes the object increasing substantially rate of penetration in above-mentioned stratum.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the three-dimensional structure diagram of conisphere chisel teeth in the utility model.
Fig. 3 is the elevation of conisphere chisel teeth in the utility model.
Fig. 4 is the top view of conisphere chisel teeth in the utility model.
Fig. 5 is the K-K sectional view of Fig. 4.
Fig. 6 is the L-L sectional view of Fig. 4.
Fig. 7 is the layout schematic diagram of conisphere chisel teeth row different from round tooth with rail.
Fig. 8 is the layout schematic diagram of the different rail of conisphere chisel teeth rows different from round tooth.
Fig. 9 is that conisphere chisel teeth and round tooth put schematic diagram with arranging.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, present embodiments provide a kind of circle, wedge combination tooth PDC drill bit, comprise bit body and wing, blade surface is provided with conisphere chisel teeth 6 and round tooth 7, and described conisphere chisel teeth 6 comprises tooth post 1 and crown, and described crown is made up of taper crown base 2 and symmetrically arranged two wedge surfaces 3, wherein, two wedge surfaces 3 are plane, and two wedge surface 3 upper ends and tooth top 4 cross, and the angle of two wedge surfaces 3 is 103 °; The surface of revolution that tooth top 4 is made up of around axis circumgyration incision two wedge surface one section of convex outer curve, the curve of surface of revolution is circular arc G, the radius of its circular arc G is 0.5mm, the straight length C of circular arc G is 0.12mm, the upper end of taper crown base 2 is joined by circular arc chamfering 5 and crest top land, and wherein, taper crown base 2 is made up of the conical surface that left and right two cone angles are identical, two conical surfaces are equal with the circular arc chamfering radius (A, B) that crest top land is connected, and circular arc chamfering radius is 1.0mm; The angular range of rectilinear generatrix (E, F) in same cross section of two conical surfaces is 101 °, and the taper crown base thickness air line distance of DC straight line (namely in Fig. 4) is 5mm.This conisphere chisel teeth 6 operationally, the tooth top of conisphere chisel teeth 6 be by the middle part of tooth top with tooth top both sides, progressively with rock contact, when just starting with rock contact, only have straightway and rock contact in the middle part of tooth top, contact area is little compared to circular composite sheet, and the localized contact stress that the rock made produces is higher, be more conducive to catalase, thus effectively can improve the efficiency of breaking rock of drill bit; By being provided with two wedge surfaces, when composite sheet and rock are interacted, attaching space is large compared to conisphere shape composite sheet space, is conducive to the eliminating of landwaste and the cleaning of composite bed and cooling, and then extends drilling life of bit; Because tooth top and other adjacent crown face are smoothly connected, eliminate the stress concentration phenomenon of connecting portion, decrease connecting portion and broken probability occurs, further increase the life-span of tooth, be easy to processing and implement.
In the present embodiment, the proud exposure L of conisphere chisel teeth 6 opposing circular tooth 7 is 0.5-3mm, wherein, conisphere chisel teeth 6 and round tooth 7 can be arranged in be put with row or different arrangement, the situation of different row can be divided into same rail and different rail to arrange (as Figure 7-9), the PDC drill bit of this mixed-arrangement, in the stratum such as hard plastic shape mud stone, limestone, conisphere chisel teeth in advance wedging stratum reaches rock precracking, discharge a part of stress, circular PDC tooth carries out scraping subsequently, thus realizes the object increasing substantially rate of penetration in above-mentioned stratum.
Claims (9)
1. a circle, wedge combination tooth PDC drill bit, comprise bit body and wing, it is characterized in that blade surface is provided with conisphere chisel teeth and round tooth, described conisphere chisel teeth comprises tooth post and crown, described crown is made up of taper crown base and corresponding two wedge surfaces arranged, and two wedge surface upper ends and tooth top cross, and it is characterized in that, the surface of revolution that tooth top is made up of around axis circumgyration incision two wedge surface one section of convex outer curve, the upper end of taper crown base is joined by circular arc chamfering and crest top land.
2. one circle according to claim 1, wedge combination tooth PDC drill bit, it is characterized in that, the proud exposure of described conisphere chisel teeth is higher than the proud exposure 0.5-3mm of round tooth.
3. one circle according to claim 1 and 2, wedge combination tooth PDC drill bit, it is characterized in that, the wedge shaped features of conisphere wedge shape PDC tooth is towards identical with circular PDC tooth cutting direction.
4. one circle according to claim 1 and 2, wedge combination tooth PDC drill bit, is characterized in that, conisphere chisel teeth and round tooth are that same row arranges or arranges with the setting of row's different rail or the different rail of different rows.
5. one circle according to claim 1 and 2, wedge combination tooth PDC drill bit, it is characterized in that, described two wedge surfaces are symmetrical arranged.
6. one circle according to claim 1 and 2, wedge combination tooth PDC drill bit, it is characterized in that, described wedge surface is plane.
7. one circle according to claim 3, wedge combination tooth PDC drill bit, it is characterized in that, the angular range of two wedge surfaces is 90 °-114 °.
8. one circle according to claim 1 and 2, wedge combination tooth PDC drill bit, it is characterized in that, the curve of described surface of revolution is circular arc, and its arc radius is 0.5-2mm, and straight length is 0.1-1mm, and taper crown base thickness is 4-6mm.
9. one circle according to claim 1 and 2, wedge combination tooth PDC drill bit, it is characterized in that, taper crown base is made up of the conical surface that left and right two cone angles are identical, two conical surfaces are equal with the circular arc chamfering radius that crest top land is connected, circular arc chamfering radius is 1-2mm, and the angular range of rectilinear generatrix in same cross section of two conical surfaces is 80 °-114 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520407123.7U CN204782782U (en) | 2015-06-12 | 2015-06-12 | Circle, mixed tooth PDC drill bit of wedge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520407123.7U CN204782782U (en) | 2015-06-12 | 2015-06-12 | Circle, mixed tooth PDC drill bit of wedge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204782782U true CN204782782U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520407123.7U Active CN204782782U (en) | 2015-06-12 | 2015-06-12 | Circle, mixed tooth PDC drill bit of wedge |
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| CN (1) | CN204782782U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927157A (en) * | 2016-06-08 | 2016-09-07 | 莱州市原野科技有限公司 | Cutting tooth and PDC (polycrystalline diamond compact) drill bit with same |
| CN108463609A (en) * | 2015-12-18 | 2018-08-28 | 史密斯国际有限公司 | The placement of on-plane surface cutting element |
| CN116816271A (en) * | 2023-08-28 | 2023-09-29 | 西南石油大学 | Multimodal tooth drill bit |
-
2015
- 2015-06-12 CN CN201520407123.7U patent/CN204782782U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108463609A (en) * | 2015-12-18 | 2018-08-28 | 史密斯国际有限公司 | The placement of on-plane surface cutting element |
| CN105927157A (en) * | 2016-06-08 | 2016-09-07 | 莱州市原野科技有限公司 | Cutting tooth and PDC (polycrystalline diamond compact) drill bit with same |
| CN116816271A (en) * | 2023-08-28 | 2023-09-29 | 西南石油大学 | Multimodal tooth drill bit |
| CN116816271B (en) * | 2023-08-28 | 2023-11-21 | 西南石油大学 | Multimodal tooth drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee after: SINOPEC OILFIELD EQUIPMENT CORPORATION Address before: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee before: Jianghan Petroleum Drilling Bit Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180404 Address after: 430223, No. 5, Chinese workers' garden, Temple Hill community, East Lake New Technology Development Zone, Wuhan, Hubei Co-patentee after: SINOPEC OILFIELD EQUIPMENT CORPORATION Patentee after: Kingdream Sinopec Petroleum Machinery Co. Ltd. Address before: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee before: SINOPEC OILFIELD EQUIPMENT CORPORATION |