CN201314198Y - Polycrystalline diamond composite sheet - Google Patents
Polycrystalline diamond composite sheet Download PDFInfo
- Publication number
- CN201314198Y CN201314198Y CNU2008202233665U CN200820223366U CN201314198Y CN 201314198 Y CN201314198 Y CN 201314198Y CN U2008202233665 U CNU2008202233665 U CN U2008202233665U CN 200820223366 U CN200820223366 U CN 200820223366U CN 201314198 Y CN201314198 Y CN 201314198Y
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- composite sheet
- working surface
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- polycrystalline diamond
- drill bit
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Abstract
The utility model relates to a polycrystalline diamond composite sheet for a drilling tool used in the drilling operation. The utility model can enhance the capacity of the composite sheet to penetrate strata, improve the rock breaking efficiency and enhance the passivation compensation capacity and the adaptability to the special strata and further enhance the overall performance and the operating efficiency of the drill bit. The polycrystalline diamond composite sheet adopts the technical scheme that the working surface of the polycrystalline diamond layer of the composite sheet is a cylindrical surface, the directrix of the cylindrical surface is a curve, and the basal body is cemented carbide; when in the longitudinal operating mode, the composite sheet is fixedly connected to the drill bit or the drilling tool in a manner that an acute angle is formed between the bus of the working surface and the axial line of the drill bit; and when in the transverse operating mode, the bus of the working surface is perpendicular to the axial line of the drill bit. The longitudinal operating mode improves the capacity of the composite sheet to penetrate strata. The transverse operating mode improves the passivation compensation capacity and the adaptability of the special strata of the composite sheet. Both the modes are favorable for improving the rock breaking efficiency of the drill. The utility model is used for the PDC drill bit, is also suitable for other drill bits or tools used for drilling wells and can be taken as the cutting element used on the rock breaking tool.
Description
Technical field
The utility model relates to the particularly composite polycrystal-diamond of polycrystalline diamond compact bit of a kind of drilling tool that is used for drilling engineering, belongs to the cutting element that uses on the rock crushing tool.
Background technology
Composite polycrystal-diamond is the cutting element that the drilling tool in the drilling engineering particularly uses on the polycrystalline diamond compact bit rock crushing tools such as (being the PDC drill bit), abbreviates composite sheet or PDC tooth or cutting teeth as.
Composite polycrystal-diamond is composited by polycrystalline diamond layer and matrix (matrix material is generally carbide alloy).The high hardness of polycrystalline diamond layer makes it have good wear-resistant ability.Simultaneously, because the hardness of polycrystalline diamond layer is far above the hardness of matrix material, in the process of composite sheet rock cutting, the rate of wear of polycrystalline diamond layer is lower than the rate of wear of matrix, so composite sheet has good wearing and tearing from sharp function.The outer face of polycrystalline diamond layer is most important cutwork surface on the composite sheet, so be called the diamond layer working surface or the working surface of composite sheet.
At present, employed polycrystalline diamond layer working surface generally is plane (seeing Fig. 3, Fig. 4) on the rock crushing tool such as PDC drill bit.Composite sheet is composited by polycrystalline diamond layer 1 and hard alloy substrate 2.The composite sheet welding-on is on bit body 3 or other drilling tool.
The working surface shape of composite sheet and the complexity on its wedging stratum are closely related.Generally, the cross section of composite sheet (the place plane parallel is in all straight edge lines of cylinder) is when area is constant, as composite sheet with vertical pattern work, be the bus of composite sheet working surface and drilling direction when acutangulating, working surface is that the composite sheet of curved surface is that the easier wedging of composite sheet stratum, the efficiency of breaking rock on plane is higher than working surface; As composite sheet with transverse mode work, be that the bus of composite sheet working surface is when vertical with drilling direction, its top rake can reduce gradually after the composite sheet wearing and tearing rust, thereby remedy its wedging stratum ability, working surface is that the composite sheet of curved surface is that the composite sheet on plane has stronger passivation compensation ability and special formation adaptive capacity than working surface.So combination property is good when being the plane than working surface when the working surface of composite sheet is curved surface.
Summary of the invention
The purpose of this utility model is: in order to improve composite sheet wedging stratum ability, efficiency of breaking rock, passivation compensation ability and special formation adaptive capacity, and then the overall performance and the operating efficiency of raising PDC drill bit or other drill bit and instrument, the spy provides a kind of composite polycrystal-diamond.
To achieve these goals, the technical scheme that this technical problem that solves the utility model adopts is: a kind of composite polycrystal-diamond, form by polycrystalline diamond layer and matrix, it is characterized in that: the polycrystalline diamond layer working surface of composite sheet is that the polycrystalline diamond layer outer face is a cylinder, the directrix of cylinder is a curve, and matrix is a carbide alloy; The composite sheet welding-on is on bit body or drilling tool, and when composite sheet was consolidated on drill bit or the drilling tool, the bus of its working surface and drill axis were that drilling direction acutangulates, and are called vertical mode of operation; When composite sheet was consolidated on drill bit or the drilling tool, the bus of its working surface was vertical with drill axis, was called horizontal mode of operation.
The diamond layer working surface of composite sheet is a cylinder, and the directrix of polycrystalline diamond layer working surface is a kind of of curved section that curved section that curved section that curved section that one section circular arc or two ends circular arc middle straight line segment connect into or two sections straightways that become the non-straight angles connect into or two ends straightway middle circle segmental arc connect into or two sections circular arcs connect into or 3 to 12 sections curved sections that circular arc connects into or 3 to 12 sections curved sections that straightway connects into or 3 to 8 sections straightways and 3 to 8 sections alternate curved sections that connect into of circular arc.
The beneficial effects of the utility model are: when (1) adopted vertical mode of operation, the ability of NEW TYPE OF COMPOSITE sheet wedging formation rock was the composite sheet on plane apparently higher than working surface, helps improving the efficiency of breaking rock of drill bit; When (2) adopting horizontal mode of operation, the passivation compensation ability of NEW TYPE OF COMPOSITE sheet and special formation adaptive capacity are the composite sheet on plane apparently higher than cutting surface all, help improving the efficiency of breaking rock of drill bit; (3) the NEW TYPE OF COMPOSITE sheet provides the working surface of spirogyrate, and the composite sheet of this structure can make that landwaste is easier to break away from from working surface, helps improving the cooling of PDC tooth, reduces the generation of mud drum phenomenon; (4) the cylinder geometry choice of the working surface of NEW TYPE OF COMPOSITE sheet is big, to put the inclination angle selectivity also big for the bus of working surface when being consolidated on drill bit or the drilling tool, can be more easily when drill bit design according to the rock property on stratum, by adjusting or selecting working surface shape and bus angle, make it more effectively adapt to the stratum crushing rock.
Description of drawings
Fig. 1 is consolidated in schematic diagram on the drill bit for the utility model composite polycrystal-diamond.Among the figure: 1. polycrystalline diamond layer, 2. matrix, 3. bit body.
Fig. 2 is the wing cloth toothing schematic diagram of polycrystalline diamond compact bit.Among the figure: 4. working surface.
Fig. 3 is the schematic diagram of the composite polycrystal-diamond on plane for the routine work surface.
Fig. 4 is the routine work surface schematic diagram of looking squarely for the composite polycrystal-diamond on plane.
When being one section circular arc for the directrix of the working surface of the utility model composite polycrystal-diamond, Fig. 5 looks squarely schematic diagram
Fig. 6 for the directrix of the working surface of the utility model composite polycrystal-diamond be two ends circular arc middle straight line segment connect into curved section the time look squarely schematic diagram
Fig. 7 for the directrix of the working surface of the utility model composite polycrystal-diamond be two sections straightways that become the non-straight angles connect into curved section the time look squarely schematic diagram
Fig. 8 for the directrix of the working surface of the utility model composite polycrystal-diamond be two ends straightway middle circle segmental arc connect into curved section the time look squarely schematic diagram
Fig. 9 for the directrix of the working surface of the utility model composite polycrystal-diamond be two sections circular arcs connect into curved section the time look squarely schematic diagram
When being 3 to 12 sections curved sections that circular arc connects into for the directrix of the working surface of the utility model composite polycrystal-diamond, Figure 10 looks squarely schematic diagram
When being 3 to 12 sections curved sections that straightway connects into for the directrix of the working surface of the utility model composite polycrystal-diamond, Figure 11 looks squarely schematic diagram.
When being the alternate curved section that connects into of 3 to 8 sections straightways and 3 to 8 sections circular arcs for the directrix of the working surface of the utility model composite polycrystal-diamond, Figure 12 looks squarely schematic diagram.
The specific embodiment
Further specify structure of the present utility model below in conjunction with accompanying drawing and concrete enforcement.
A kind of composite polycrystal-diamond, it is the same polycrystalline diamond layer 1 and the matrix 2 of comprising of composite sheet on plane with working surface, different is: working surface is that the working surface 4 of the composite sheet on plane is a single plane, and the working surface 4 of the composite sheet that the utility model proposes is cylinder.Because this composite sheet does the time spent mutually with rock, acutangulate as the bus and the drilling direction of its working surface, itself and the contacted cutting edge region of rock are narrower, can form high contact stress on rock, help the wedging stratum; Bus as its working surface is vertical with drilling direction, and along with the wearing and tearing of composite sheet, its cutting top rake can reduce gradually when then creeping into, going deep into its wedging ability and can obtain benefit and increase along with wearing and tearing and stratum.So NEW TYPE OF COMPOSITE sheet wedging stratum ability, efficiency of breaking rock, passivation compensation ability and special formation adaptive capacity are the composite sheet on plane apparently higher than working surface all, help improving drill bit overall performance and operating efficiency.
Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12 is a kind of of novel composite polycrystal-diamond, the directrix of diamond layer working surface is one section circular arc, or the curved section that connects into of two ends circular arc middle straight line segment, or two sections curved sections that the straightway that becomes the non-straight angles connects into, or the curved section that connects into of two ends straightway middle circle segmental arc, or two sections curved sections that circular arc connects into, or 3 to 12 sections curved sections that circular arc connects into, or 3 to 12 sections curved sections that straightway connects into, or 3 to 8 sections straightways and 3 to 8 sections alternate curved sections that connect into of circular arc, the diamond layer working surface of composite sheet is a cylinder.
When the NEW TYPE OF COMPOSITE sheet was consolidated on bit body or the drilling tool, the axis (being drilling direction) of the bus of its working surface and drill bit or drilling tool was vertical or acutangulate.
The NEW TYPE OF COMPOSITE sheet not only can be used for the PDC drill bit, also is applicable to be that other drilling well of wear-resisting cutting element is with drill bit or instrument with composite polycrystal-diamond.
Claims (2)
1. composite polycrystal-diamond, form by polycrystalline diamond layer and matrix, it is characterized in that: the working surface (4) of the polycrystalline diamond layer of composite sheet (1) is that the polycrystalline diamond layer outer face is a cylinder, and the directrix of cylinder is a curve, and matrix (2) is a carbide alloy; The composite sheet welding-on is on bit body (3) or drilling tool, and when composite sheet was consolidated on drill bit or the drilling tool, bus of its working surface (4) and drill axis were that drilling direction acutangulates; Or the bus of its working surface (4) is vertical with drill axis.
2. composite polycrystal-diamond according to claim 1 is characterized in that: the directrix of the working surface (4) of polycrystalline diamond layer (1) is one section circular arc, or the curved section that connects into of two ends circular arc middle straight line segment, or two sections curved sections that the straightway that becomes the non-straight angles connects into, or the curved section that connects into of two ends straightway middle circle segmental arc, or two sections curved sections that circular arc connects into, or 3 to 12 sections curved sections that circular arc connects into, or 3 to 12 sections curved sections that straightway connects into, or 3 to 8 sections straightways and 3 to 8 sections alternate curved sections that connect into of circular arc is a kind of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202233665U CN201314198Y (en) | 2008-12-12 | 2008-12-12 | Polycrystalline diamond composite sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202233665U CN201314198Y (en) | 2008-12-12 | 2008-12-12 | Polycrystalline diamond composite sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201314198Y true CN201314198Y (en) | 2009-09-23 |
Family
ID=41125991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202233665U Expired - Lifetime CN201314198Y (en) | 2008-12-12 | 2008-12-12 | Polycrystalline diamond composite sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201314198Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699555A (en) * | 2012-06-19 | 2012-10-03 | 中煤科工集团西安研究院 | Transitional connection piece of polycrystalline diamond clad sheet and drill bit matrix and connection process for transitional connection piece |
| CN103635653A (en) * | 2011-06-21 | 2014-03-12 | 贝克休斯公司 | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and methods of forming such cutting elements for earth-boring tools |
| CN103867131A (en) * | 2012-12-18 | 2014-06-18 | 宜昌神达石油机械有限公司 | Diamond compound cutting head |
| CN104653113A (en) * | 2013-11-25 | 2015-05-27 | 莱州市原野科技有限公司 | Vertical tooth PDC (polycrystalline diamond compact) drill bit polycrystalline diamond clad sheet |
-
2008
- 2008-12-12 CN CNU2008202233665U patent/CN201314198Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103635653A (en) * | 2011-06-21 | 2014-03-12 | 贝克休斯公司 | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and methods of forming such cutting elements for earth-boring tools |
| CN103635653B (en) * | 2011-06-21 | 2017-01-18 | 贝克休斯公司 | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and methods of forming such cutting elements for earth-boring tools |
| US9797200B2 (en) | 2011-06-21 | 2017-10-24 | Baker Hughes, A Ge Company, Llc | Methods of fabricating cutting elements for earth-boring tools and methods of selectively removing a portion of a cutting element of an earth-boring tool |
| US10428585B2 (en) | 2011-06-21 | 2019-10-01 | Baker Hughes, A Ge Company, Llc | Methods of fabricating cutting elements for earth-boring tools and methods of selectively removing a portion of a cutting element of an earth-boring tool |
| CN102699555A (en) * | 2012-06-19 | 2012-10-03 | 中煤科工集团西安研究院 | Transitional connection piece of polycrystalline diamond clad sheet and drill bit matrix and connection process for transitional connection piece |
| CN103867131A (en) * | 2012-12-18 | 2014-06-18 | 宜昌神达石油机械有限公司 | Diamond compound cutting head |
| CN103867131B (en) * | 2012-12-18 | 2017-05-24 | 宜昌神达石油机械有限公司 | Diamond compound cutting head |
| CN104653113A (en) * | 2013-11-25 | 2015-05-27 | 莱州市原野科技有限公司 | Vertical tooth PDC (polycrystalline diamond compact) drill bit polycrystalline diamond clad sheet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090923 |