CN105134086A - Polycrystalline diamond compact with anti-adhesion characteristic - Google Patents
Polycrystalline diamond compact with anti-adhesion characteristic Download PDFInfo
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- CN105134086A CN105134086A CN201510508988.7A CN201510508988A CN105134086A CN 105134086 A CN105134086 A CN 105134086A CN 201510508988 A CN201510508988 A CN 201510508988A CN 105134086 A CN105134086 A CN 105134086A
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Abstract
The invention discloses a polycrystalline diamond compact with anti-adhesion characteristic. The polycrystalline diamond compact comprises a cemented carbide substrate and a polycrystalline diamond layer compounded on the cemented carbide substrate. The active face of the polycrystalline diamond layer has a groove structure. The groove structure comprises a plurality of radial grooves radially arranged along the radial direction of the active face and a plurality of arc circumferential grooves communicated with the radial grooves, the radial grooves divide the active face into a plurality of sectors, the circumferential grooves are distributed concentrically with the center of the active face as the center of circle, and the circumferential grooves of adjacent sectors are arranged alternately. According to the polycrystalline diamond compact with anti-adhesion characteristic, the grooves on the active face reduce the area of contact between rock cuttings and the active face and reduce the adhesion. Drilling fluid can enter the inside of the grooves to lubricate the active face of the compact, and rock cuttings can be carried away from the pit bottom by the drilling fluid, so that adhesion and accumulation of rock cuttings in front of the active face of the compact are avoided, and the formation of a PDC bit balling is prevented fundamentally.
Description
Technical field
The present invention relates to oil and gas well drilling technical field of tools, particularly relate to the composite polycrystal-diamond with anti-adhesion characteristics on a kind of PDC of being applied to drill bit.
Background technology
PDC drill bit (PDC is the abbreviation of English PolycrystallineDiamondCompactbit, and PDC drill bit is the abbreviation of polycrystalline diamond compact bit) is a kind of drilling tool that the industries such as oil and gas well drilling are commonly used.PDC drill bit is roughly made up of a few parts such as bit body, cutting teeth, nozzle and chip areas, PDC drill bit relies on the cutting teeth be arranged on bit body to cut stratum, wherein, composite polycrystal-diamond (being called for short composite sheet or PDC tooth) is as cutting element, it is the core of cutting teeth, composite sheet is generally disc-shaped, be composited as substrate and polycrystalline diamond layer by hard alloy substrate (being generally tungsten carbide), the cutwork face of composite sheet is used as, also referred to as sword face before polycrystalline diamond layer.
During PDC drill bit fragmentation plastic rock, composite polycrystal-diamond is wedging stratum under axial, and the rock simultaneously in face of composite sheet polycrystalline diamond layer sword constantly plastic strain occurs under the effect of twisting resistance, and the final parent rock that departs from also is taken away by drilling fluid.When boring chance argiloid stratum, due to argillaceous rocks CLAY MINERALS AND THEIR SIGNIFICANCE hydration swelling, landwaste plasticity strengthens, very easily adhere on composite sheet sword face, not easily carried by drilling fluid and depart from shaft bottom, along with the accumulation aggravation of landwaste on composite sheet sword face, expand in chip area gradually, until form whole bit balling.
At present, the measure improving the anti-mud drum performance of PDC drill bit self mainly comprises three aspects: (1) drill bit structure improves; (2) hydraulic design optimization; (3) bit body surfacing.For PDC drill bit, mud drum is by the accumulation of landwaste on composite sheet sword face, though and the formation of said method to whole bit balling has certain preventive effect, fail from mud drum formed the initial stage control effectively.Therefore, a kind of composite polycrystal-diamond that shale landwaste can be prevented to adhere to of necessary design.
Summary of the invention
In view of this, technical problem to be solved by this invention is: provide a kind of composite polycrystal-diamond with anti-adhesion characteristics, reduce the possibility that landwaste and composite sheet adhere to, avoid the attachment of landwaste on composite sheet sword face and accumulation, the fundamentally generation of prevention PDC bit balling.
For solving the problems of the technologies described above, technical scheme of the present invention is: the composite polycrystal-diamond with anti-adhesion characteristics, comprise hard alloy substrate and be compound in the polycrystalline diamond layer on described hard alloy substrate, the sword face of described polycrystalline diamond layer is provided with groove structure.
Preferably, described groove structure comprises some radial grooves, and some described radial grooves are radially arranged along the radial direction in described sword face, and described sword face is divided into several sectors; The preferably angle theta ﹦ 10 ~ 30 ° of adjacent two described radial grooves.
Preferably, described groove structure also comprises the circumferential grooves of the some arcs be communicated with described radial groove further, some described circumferential grooves with the center in described sword face for the center of circle is in one heart distribution.
Preferably, the described circumferential grooves of adjacent sectors is crisscross arranged.
Preferably, the spacing of two adjacent described circumferential grooves of adjacent sectors is w, and in same sector, the spacing of two adjacent described circumferential grooves is 2w, preferred w=0.5 ~ 1mm.
Preferably, rectangular, trapezoidal, the triangle of the cross section of described groove structure or arc; Width a=0.1 ~ the 0.2mm of described groove structure, degree of depth b=0.05 ~ 0.1mm.
After have employed technique scheme, the composite polycrystal-diamond with anti-adhesion characteristics of the present invention, owing to being provided with groove structure on the sword face of polycrystalline diamond layer, the setting of groove structure reduces the contact area in landwaste and sword face in drilling process, thus reduces the adhesion between landwaste and composite sheet sword face; Meanwhile, the groove structure on sword face constitutes the flow channel of drilling fluid, and drilling fluid can enter in groove, lubrication composite sheet sword face, reduces frictional force and the adhesion in landwaste and sword face.
Be the some radial grooves radially arranged along the radial direction in sword face by further for groove structure optimal design, and the circumferential grooves of the some arcs to be communicated with radial groove, a large amount of radial grooves and the existence of circumferential grooves, further reduce the contact area in landwaste and sword face, reduce the adhesion between landwaste and composite sheet sword face; Constitute more drilling fluid flow channel, reduce further frictional force and the adhesion in landwaste and sword face.
In sum, the composite polycrystal-diamond with anti-adhesion characteristics of the present invention effectively can improve the non-stick nature energy of composite polycrystal-diamond, reduce the adhesion probability of sword face and shale landwaste, avoid the attachment of landwaste in face of composite sheet sword and accumulation, fundamentally prevent the formation of bit balling, reach and reduce drilling well non-cutting time, improve drill bit drilling efficiency, reduce the object of drilling cost.
Accompanying drawing explanation
Fig. 1 is the composite polycrystal-diamond perspective view that the embodiment of the present invention one has anti-adhesion characteristics;
Fig. 2 is the schematic top plan view of Fig. 1;
Fig. 3 is the composite polycrystal-diamond perspective view that the embodiment of the present invention two has anti-adhesion characteristics;
Fig. 4 is the schematic top plan view of Fig. 3;
Fig. 5 is the rectangular groove structure cross-sectional schematic of cross section;
Fig. 6 is cross section groove structure cross-sectional schematic triangular in shape;
Fig. 7 is cross section is trapezoidal groove structure cross-sectional schematic;
Fig. 8 is the curved groove structure cross-sectional schematic of cross section;
In figure: 1-hard alloy substrate; 2-polycrystalline diamond layer; 3-sword face; 41-radial groove; 42-circumferential grooves.
Detailed description of the invention
Below in conjunction with drawings and Examples, nonrestrictive detailed description is carried out to the present invention.
Embodiment one
As depicted in figs. 1 and 2, the composite polycrystal-diamond with anti-adhesion characteristics of embodiment one, the polycrystalline diamond layer 2 comprising hard alloy substrate 1 and be compound on this hard alloy substrate 1, the sword face 3 of polycrystalline diamond layer 2 is provided with groove structure, in the present embodiment, groove structure comprises some radial grooves 41, and sword face 3 for the radial direction of starting point along sword face 3 is radially arranged, is divided into several sectors with the center of circle in sword face 3 by some radial grooves 41.Wherein, the angle theta ﹦ 10 ~ 30 ° between two adjacent radial grooves 41, illustrates the situation of θ ﹦ 30 ° in figure.
As shown in Fig. 5, Fig. 6, Fig. 7 and Fig. 8, the cross section of groove can be designed to rectangle, trapezoidal, triangle, arc or other various shape be applicable to; Wherein, the width a=0.1 ~ 0.2mm of groove, the degree of depth b=0.05 ~ 0.1mm of groove.
Embodiment two
As shown in Figure 3 and Figure 4, the composite polycrystal-diamond with anti-adhesion characteristics of embodiment two, substantially identical with embodiment one, difference is: on the basis of embodiment one, to the further optimal design of groove structure, groove structure in embodiment two also comprises the circumferential grooves 42 of the some arcs be communicated with radial groove 41, some circumferential grooves 42 with the center in sword face 3 for the center of circle is in one heart distribution.Wherein, the circumferential grooves 42 of adjacent sectors is preferably crisscross arranged, and coordinates with radial groove 41, extends drilling fluid circuitous flow passage length, can extend the storage time of drilling fluid in groove, is conducive to the frictional force and the adhesion that reduce landwaste and sword face.Wherein, the spacing of two adjacent circumferential grooves 42 of adjacent sectors is w, and in same sector, the spacing of two adjacent circumferential grooves 42 is 2w, preferred w=0.5 ~ 1mm.
In sum, the composite polycrystal-diamond with anti-adhesion characteristics of the present invention, owing to being provided with mutually through a large amount of groove on the sword face of polycrystalline diamond layer, the contact area in landwaste and composite sheet sword face is few, and adhesion reduces; Drilling fluid can enter in groove, lubrication composite sheet sword face, and landwaste can be carried by drilling fluid and depart from shaft bottom, thus avoids the attachment of landwaste in face of composite sheet sword and accumulation, fundamentally prevents the formation of PDC bit balling.
The above is only the citing of better embodiment of the present invention, and the part wherein do not addressed in detail is the common practise of those of ordinary skill in the art.Protection scope of the present invention is as the criterion with the content of claim, and any equivalent transformation carried out based on technology enlightenment of the present invention, all within protection scope of the present invention.
Claims (9)
1. there is the composite polycrystal-diamond of anti-adhesion characteristics, comprising: hard alloy substrate and the polycrystalline diamond layer be compound on described hard alloy substrate, is characterized in that, the sword face of described polycrystalline diamond layer is provided with groove structure.
2. there is the composite polycrystal-diamond of anti-adhesion characteristics as claimed in claim 1, it is characterized in that, described groove structure comprises some radial grooves, and some described radial grooves are radially arranged along the radial direction in described sword face, and described sword face is divided into several sectors.
3. there is the composite polycrystal-diamond of anti-adhesion characteristics as claimed in claim 2, it is characterized in that, described groove structure also comprises the circumferential grooves of the some arcs be communicated with described radial groove, some described circumferential grooves with the center in described sword face for the center of circle is in one heart distribution.
4. have the composite polycrystal-diamond of anti-adhesion characteristics as claimed in claim 3, it is characterized in that, the described circumferential grooves of adjacent sectors is crisscross arranged.
5. have the composite polycrystal-diamond of anti-adhesion characteristics as claimed in claim 4, it is characterized in that, the spacing of two adjacent described circumferential grooves of adjacent sectors is w, and in same sector, the spacing of two adjacent described circumferential grooves is 2w.
6. there is the composite polycrystal-diamond of anti-adhesion characteristics as claimed in claim 5, it is characterized in that, w=0.5 ~ 1mm.
7. the composite polycrystal-diamond with anti-adhesion characteristics as described in any one of claim 2-6, is characterized in that, the angle theta ﹦ of adjacent two described radial grooves 10 ~ 30 °.
8. there is the composite polycrystal-diamond of anti-adhesion characteristics as claimed in claim 1, it is characterized in that, the cross section of described groove structure is rectangular, trapezoidal, triangle or arc.
9. there is the composite polycrystal-diamond of anti-adhesion characteristics as claimed in claim 8, it is characterized in that, the width a=0.1 ~ 0.2mm of described groove structure, degree of depth b=0.05 ~ 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510508988.7A CN105134086B (en) | 2015-08-18 | 2015-08-18 | Composite polycrystal-diamond with anti-adhesion characteristics |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510508988.7A CN105134086B (en) | 2015-08-18 | 2015-08-18 | Composite polycrystal-diamond with anti-adhesion characteristics |
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| CN105134086A true CN105134086A (en) | 2015-12-09 |
| CN105134086B CN105134086B (en) | 2018-01-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018166191A1 (en) * | 2017-03-14 | 2018-09-20 | 河南四方达超硬材料股份有限公司 | Drilling pre-formed polycrystalline diamond compact with efficient debris removal function |
| CN108661563A (en) * | 2018-05-16 | 2018-10-16 | 中国石油天然气集团有限公司 | Cutting tooth contains the PDC drill bit of fluid channel |
| CN114508307A (en) * | 2022-02-15 | 2022-05-17 | 中国石油大学(华东) | Bionic high-impact-resistance polycrystalline diamond compact |
| CN116677712A (en) * | 2023-08-02 | 2023-09-01 | 吉林大学 | Shell stripe-like surface texture cobalt-removing diamond thrust bearing |
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| US5667028A (en) * | 1995-08-22 | 1997-09-16 | Smith International, Inc. | Multiple diamond layer polycrystalline diamond composite cutters |
| US20010003932A1 (en) * | 1997-06-05 | 2001-06-21 | Scott M. Packer | Multi-layer, multi-grade multiple cutting surface pdc cutter |
| CN2881059Y (en) * | 2005-11-25 | 2007-03-21 | 江汉石油钻头股份有限公司 | Impact resistant polycrystal diamond composite sheet |
| CN101280666A (en) * | 2008-06-04 | 2008-10-08 | 河南四方超硬材料有限公司 | Polycrystal diamond hard alloy complex sheet of surface groove with lack Co area |
| CN201202408Y (en) * | 2008-06-04 | 2009-03-04 | 河南四方达超硬材料股份有限公司 | Polycrystalline diamond hard alloy composite sheet grooving on surface |
| CN204075223U (en) * | 2014-08-07 | 2015-01-07 | 山东昌润钻石股份有限公司 | A kind of diamond compact substrate |
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2015
- 2015-08-18 CN CN201510508988.7A patent/CN105134086B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5667028A (en) * | 1995-08-22 | 1997-09-16 | Smith International, Inc. | Multiple diamond layer polycrystalline diamond composite cutters |
| US20010003932A1 (en) * | 1997-06-05 | 2001-06-21 | Scott M. Packer | Multi-layer, multi-grade multiple cutting surface pdc cutter |
| CN2881059Y (en) * | 2005-11-25 | 2007-03-21 | 江汉石油钻头股份有限公司 | Impact resistant polycrystal diamond composite sheet |
| CN101280666A (en) * | 2008-06-04 | 2008-10-08 | 河南四方超硬材料有限公司 | Polycrystal diamond hard alloy complex sheet of surface groove with lack Co area |
| CN201202408Y (en) * | 2008-06-04 | 2009-03-04 | 河南四方达超硬材料股份有限公司 | Polycrystalline diamond hard alloy composite sheet grooving on surface |
| CN204075223U (en) * | 2014-08-07 | 2015-01-07 | 山东昌润钻石股份有限公司 | A kind of diamond compact substrate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018166191A1 (en) * | 2017-03-14 | 2018-09-20 | 河南四方达超硬材料股份有限公司 | Drilling pre-formed polycrystalline diamond compact with efficient debris removal function |
| CN108661563A (en) * | 2018-05-16 | 2018-10-16 | 中国石油天然气集团有限公司 | Cutting tooth contains the PDC drill bit of fluid channel |
| CN114508307A (en) * | 2022-02-15 | 2022-05-17 | 中国石油大学(华东) | Bionic high-impact-resistance polycrystalline diamond compact |
| CN116677712A (en) * | 2023-08-02 | 2023-09-01 | 吉林大学 | Shell stripe-like surface texture cobalt-removing diamond thrust bearing |
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| Publication number | Publication date |
|---|---|
| CN105134086B (en) | 2018-01-26 |
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