CN105804663B - Pdc composition having a single cone bit teeth - Google Patents

Pdc composition having a single cone bit teeth Download PDF

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CN105804663B
CN105804663B CN201610349072.6A CN201610349072A CN105804663B CN 105804663 B CN105804663 B CN 105804663B CN 201610349072 A CN201610349072 A CN 201610349072A CN 105804663 B CN105804663 B CN 105804663B
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pdc
teeth
combination
cone
body
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CN105804663A (en
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程文明
陈炼
杨迎新
杨燕
范晓勒
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西南交通大学
四川川石·克锐达金刚石钻头有限公司
西南石油大学
成都为石油科技有限公司
成都为一石油科技有限公司
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Abstract

本发明公开了一种具有PDC组合齿的单牙轮钻头,属于石油天然气、矿山工程、建筑基础工程施工、地质、水文等钻探设备技术领域,包括钻头体和牙轮,牙轮与钻头体为转动连接,牙轮上设置有切削齿,牙轮上的切削齿至少有一颗为PDC组合齿,PDC组合齿由两颗PDC齿组合而成,PDC齿由本体和覆盖本体支撑面60%以上区域的聚晶金刚石层构成,两颗PDC齿的组合方式为聚晶金刚石层紧密贴合,并由外侧的两本体夹持呈四层夹心结构;PDC组合齿设置在牙轮上时,PDC组合齿的聚晶金刚石层贴合面的法线与牙轮上该PDC组合齿设置点处的牙轮轮廓曲面的法线的夹角在75‑90°之间。 The present invention discloses a single-cone bit having a combination of PDC teeth, belonging to the technical field of oil and gas, mining engineering, building foundation construction, geology, hydrology and other drilling equipment, comprising a body and a roller cone bit, cone bit body is rotatably connected, is provided with cutting teeth, the cutting teeth on the cones of at least one combination of teeth as the PDC, the combination of two teeth PDC composition from PDC cutter, PDC cutter body supporting surface of the body and cover more than 60% of the area of ​​the cone the polycrystalline diamond layers, two combinations PDC cutter is in close contact with the polycrystalline diamond layer, sandwiched by the two outer form of the body structure of a four-layer sandwich; composition when the teeth provided on the PDC cutters, combination teeth PDC the polycrystalline diamond layer is affixed to the angle between the normal of the combination of teeth PDC cutters disposed at a point of engagement on the curved surface contour of the normal and the cone in between 75-90 °. 本发明能够提高单牙轮钻头的破岩效率和使用寿命。 The present invention can improve the single cone bit rock breaking efficiency and service life.

Description

一种具有PDG组合齿的单牙轮钻头 PDG single cone bit having a combination of teeth

技术领域 FIELD

[0001] 本发明属于石油天然气、矿山工程、建筑基础工程施工、地质、水文等钻探设备技术领域,具体的讲涉及一种单牙轮钻头。 [0001] The present invention belongs to the technical field of oil and gas, mining engineering, building foundation construction, geology, hydrology and other drilling equipment, specifically, it relates to a single-cone bit.

背景技术 Background technique

[0002] 钻头是钻井工程中用以破碎岩石、形成井筒的破岩工具。 [0002] The drill bit is drilling the rock-breaking tool for breaking rock, the formation of the wellbore. 现今钻井工程中所使用的钻头主要有牙轮钻头和PDC (聚晶金刚石复合片)钻头。 Nowadays drill drilling engineering used mainly cone bits and PDC (polycrystalline diamond compact) drill bit.

[0003]牙轮钻头上的牙轮通过轴承系统与钻头体形成转动连接,钻头工作时,钻头体旋转带动牙轮绕钻头轴线转动的同时,牙轮还会绕自身的轴线转动,牙轮上的切削齿在上述两种运动的合成下作复杂的复合运动,牙轮钻头属非固定切削齿钻头。 [0003] The rock bit cone is formed by the bearing system rotatably connected to the bit body, the bit working simultaneously driven rotary cone bit body about the bit axis of rotation, the cone also rotates around its own axis, the cone synthesis of the cutting teeth of the two movements mainly as a complex compound motion, is a non-cone bit teeth fixed cutter drill bit.

[0004]单牙轮钻头是牙轮钻头中的一种,是钻井工程中使用的主要破岩工具之一,特别是在深井超深井的小井眼钻井中发挥着重要的作用。 [0004] is a single cone bit cone bit in one of the main rock-breaking tool for use in drilling, plays an important role, especially in the deep ultra-deep slim hole drilling. 单牙轮钻头主要利用牙轮上的牙齿(切削齿)对岩石的挤压刮切作用破岩,牙轮上的切削齿在井底以网状形式刮切岩石。 The main use of the single cone bit teeth (cutting teeth) extruding the scraping action of the rock on the roller cone rock breaking, cutting teeth on the cone at the bottom in the form of a mesh scraping rock. 单牙轮钻头牙轮上的切削齿一部分(牙轮前端)始终与井底接触破岩,一部分切削齿轮换与井底接触破岩,这就把单牙轮钻头的牙轮分成了恒接触区(牙轮前端,如图5的21)和交替接触区(如图5的22)。 Teeth portion (tip end cone) cutting the single cone rock bit cone is always in contact with the bottom breaking, cutting a portion of a gear change into contact with the bottom rock breaking, which the single cone roller cone bit constant into the contacting zone (distal cone, 5, 21) and alternating contact regions (5, 22).

[0005]单牙轮钻头钻进过程中牙轮绕钻头轴线旋转的同时还绕自身的轴线自转,牙轮上的切削齿相对井底岩石的刮切方向在不断地变化:牙轮恒接触区上的切削齿在刮切岩石过程中,其相对岩石的刮切方向在0〜360°之间不断变化;牙轮交替接触区上的切削齿在刮切岩石过程中,其相对岩石的刮切方向在0〜180°之间变化。 [0005] The single cone roller cone drill bit during the drilling bit rotation about its own axis but also about the axis of rotation, constantly changing the cutting teeth on the opposite roller cone rock bottom scraping direction: cone constant contact area the cutting teeth on the rock in the scraping process, the scraping direction relative to the rock changing between 0~360 °; alternate cutting teeth on the roller cone rock contact region scraping process, the scraping rock relative change of direction between 0~180 °. 这使单牙轮钻头上无法直接应用极适合于以刮切形式破岩的聚晶金刚石复合片(PDC齿)等耐磨性极强的金刚石类切削齿。 This allows the single cone not very suitable for applications polycrystalline diamond compact (PDC teeth) to scrape abrasion resistance in the form of broken rock and other strong direct diamond cutters on the drill bit. 原因在于聚晶金刚石复合片(PDC齿)是由本体和聚晶金刚石层两部分组成,对岩石起主要刮切效果的是聚晶金刚石层,PDC齿刮切工作时具有方向性,只能是聚晶金刚石层在前本体在后。 The reason is that polycrystalline diamond compact (PDC teeth) is composed of two portions of the body and the polycrystalline diamond layer, play a major rock scraping effect is polycrystalline diamond layer, the PDC cutting teeth scraping work has directionality, only polycrystalline diamond layer after the front of the body. 如果PDC齿在工作过程中直接受到反向作用力,很容易造成聚晶金刚石层的崩裂,严重降低PDC齿的工作寿命,甚至在极短的时间内使PDC齿损坏失效。 If directly subjected to PDC cutter opposing force during operation, it is likely to cause chipping of the polycrystalline diamond layer, severely reduce the working life of the PDC cutter, so that even damage the PDC cutter in a very short period of time.

[0006] 因此,现有单牙轮钻头上的切削齿一般为硬质合金齿,硬质合金齿的耐磨性远不及PDC齿等金刚石类切削齿。 [0006] Thus, the cutting teeth on an existing single cone bit teeth is generally a cemented carbide, and the wear resistance of carbide teeth far PDC diamond cutting teeth, such as teeth. 切削齿的耐磨性不足是单牙轮钻头的致命弱点,切削齿易磨损严重影响了单牙轮钻头的使用寿命。 The wear resistance of the cutting teeth is a single cone bit less than the Achilles heel of the cutting teeth wear seriously affected the life of a single cone bit.

发明内容 SUMMARY

[0007] 本发明的目的在于:提出一种具有PDC组合齿的单牙轮钻头,以提高单牙轮钻头的破岩效率和使用寿命。 Objective [0007] The present invention is to: propose single cone bit having PDC combination of teeth, in order to improve efficiency and service life of rock breaking single cone bit.

[0008] 本发明目的通过下述技术方案来实现: [0008] The object of the present invention is achieved by the following technical scheme:

[0009] 一种具有PDC组合齿的单牙轮钻头,包括钻头体和牙轮,牙轮与钻头体为转动连接,牙轮上设置有切削齿,牙轮上的切削齿至少有一颗为PDC组合齿,PDC组合齿由两颗PDC 齿组合而成,PDC齿由本体和覆盖本体支撑面60%以上区域的聚晶金刚石层构成(优选由本体和覆盖本体整个支撑面的聚晶金刚石层构成),两颗roc齿的组合方式为聚晶金刚石层紧密贴合,并由外侧的两本体夹持呈四层夹心结构,且靠近牙轮部分的厚度大于远离牙轮部分的厚度,最远离牙轮的尖端部分的两侧本体厚度均小于中间聚晶金刚石层厚度的2倍,固定于牙轮内的两侧本体厚度均大于中间聚晶金刚石层厚度的3倍;PDC组合齿的聚晶金刚石层贴合面的法线与牙轮上该PDC组合齿设置点处的牙轮轮廓曲面的法线的夹角在75-go。 [0009] A combination of PDC having a single cone bit teeth, comprising a body and a roller cone bit, cone bit body is rotatably connected to the roller is provided with cutting teeth, the cutting teeth on the cones is at least one PDC the combination of teeth, the teeth PDC composition formed by a combination of two teeth PDC, PDC cutter body supporting surface area more than 60% covered by the body and the polycrystalline diamond layer is formed (preferably by the body and the polycrystalline diamond layer covers the entire support surface of the main body constituting ), roc combinations of two teeth of the polycrystalline diamond layer into close contact with the outer side by two clamping bodies form a four-layer sandwich structure, and near the cone portion is greater than the thickness remote from the cone portions, farthest from the teeth thickness of the body on both sides of the wheel tip portion 2 is less than twice the thickness of the intermediate layer of polycrystalline diamond is fixed to the sides of the body thickness in the cone greater than the thickness of the intermediate layer of polycrystalline diamond is 3 times; the PDC composition of polycrystalline diamond teeth the angle between the normal of topping composition PDC teeth provided at a point on the profile surface of the cone and the cone engagement surface normal in 75-go. . [0010]聚晶金刚石复合片又称PDC齿(Polycrystalline Diamond Compact)或PDC复合片,由^聚晶金刚石层和本体两部分组成(参考图6)。 [0010] also known as polycrystalline diamond compact PDC cutter (Polycrystalline Diamond Compact), or PDC composite sheet, a two-part ^ and the body composition of the polycrystalline diamond layer (see FIG. 6). PDC齿采用金刚石微粉与硬质合金基片在超高压高温条件下烧结而成。 PDC cutter with a diamond powder and cemented carbide substrate sintered at ultra high pressure high temperature conditions. 金刚石微粉形成PDC齿的聚晶金刚石层(厚度一般在0.5-3mm之间),硬质合金基片成为TOC齿的本体。 PDC cutter diamond powder form polycrystalline diamond layer (thickness typically between 0.5-3mm), the body becomes hard alloy substrate TOC teeth. PDC齿既具有金刚石的高硬度、高耐磨性,又具有硬质合金的强度与抗冲击韧性,是制造切削刀具、钻井钻头及其他耐磨工具的理想材料。 PDC cutter as high hardness, high wear resistance with diamond and cemented carbide strength and impact toughness, is an ideal material for manufacturing cutting tools, drilling bits and other wear-resistant tools. PDC齿适合于以刮切的方式工作,由于PDC齿的聚晶金刚石层的硬度和耐磨性远远高于硬质合金材料的本体,因此PDC齿在刮切工作时具有自锐性,即聚晶金刚石层的磨损速度明显慢于本体,使PDC齿的切削刃(硬而耐磨的聚晶金刚石层)始终保持锐利状态。 PDC cutter is adapted to operate in a scraping manner, since the hardness and wear resistance of the polycrystalline diamond PDC cutter is much higher than the bulk layer of cemented carbide material, and therefore since the sharp PDC cutter having a cutting blade at the time of working, i.e., the wear rate of the polycrystalline diamond layer is significantly slower than the body, so that the cutting edges of the teeth PDC (polycrystalline diamond hard, wear-resistant layer) remain sharp state.

[0011] PDC齿刮切工作时,起主要刮切作用的是聚晶金刚石层。 [0011] PDC cutting teeth scraping work, play a major role is the scraping polycrystalline diamond layer. PDC齿的聚晶金刚石层硬而脆,本体相对软但具有很好的抗冲击軔性,因此PDC齿刮切工作时具有方向性,只能是聚晶金刚石层在前本体在后进行刮切(参考图7),即本体处在聚晶金刚石层的后部推持支撑着聚晶金刚石层。 PDC cutter polycrystalline diamond layer is hard and brittle, the body having a relatively soft, but excellent impact resistance brake, thus having directionality PDC cutter scraping work, only for the polycrystalline diamond body after scraping the front layer (refer to FIG. 7), i.e. in the rear portion of the body of polycrystalline diamond layer pushing holder supported polycrystalline diamond layer. 如果PDC齿在工作过程中反向运动,本体在前聚晶金刚石层在后进行刮切,聚晶金刚石层直接受到反向作用力,很容易造成聚晶金刚石层的崩裂或脱落,严重降低PDC齿的工作寿命,甚至在极短的时间内使PDC齿损坏失效。 If the backward motion PDC cutter in operation, the first polycrystalline diamond layer in the body after scraping, the polycrystalline diamond layer is directly affected by the opposing force, or is likely to cause chipping off of the polycrystalline diamond layer, severely reduced PDC teeth working life, even in a very short period of time so that the teeth would damage the PDC.

[0012]本专利中,PDC组合齿的聚晶金刚石层贴合面的法线,是指垂直于f>DC组合齿的聚晶金刚石层贴合面的直线。 [0012] In this patent, a combination of the PDC normal tooth bonding surface of the polycrystalline diamond layer, means the plane perpendicular to the f> DC compositions teeth polycrystalline diamond layer bonded to the surface of the straight line. 牙轮轮廓曲面,是指在设置切削齿前,原牙轮实体表面(曲面)。 Cone contour surface, means disposed before the cutting teeth, the original solid cone surface (a curved surface). 牙轮轮廓曲面某点处的法线,是指垂直于该点切平面的直线。 Normal at a point cone surface profile, refers to a line perpendicular to the tangential plane of the point. 牙轮上的PDC组合齿设置点, 是指在设置PDC组合齿前,原牙轮表面上用以设置切削齿的定位(参考)点。 PDC composition tooth point disposed on the roller means disposed in front of the tooth PDC composition for a positioning (reference) point of the cutting teeth on the cone surface of the original. 轴平面是指过牙轮轴线的平面;过PDC组合齿设置点的轴平面是指既过PDC组合齿设置点又过牙轮轴线的平面,即由PDC组合齿设置点和牙轮轴线确定的平面。 Refers to a plane through the axial plane of the cone axis; PDC composition through the tooth point disposed axial plane means a plane through both the PDC and composition tooth point disposed through the axis of the cone, i.e., a combination of the teeth and cone axis set point determined by the PDC flat. ⑽13]本专利中将两颗聚晶金刚石层相贴合的PDC齿形成的PDC组合齿设置在单牙轮钻头的牙轮上,其较现有技术的有益效果是: ⑽13] PDC in the compositions of the present patent two teeth PDC polycrystalline diamond layer bonded form teeth provided on a single roller cone bits, the beneficial effects over the prior art is:

[0014]丨、本专利单牙轮钻头上的PDC组合齿由两颗聚晶金刚石层相贴合的!^齿构成, PDC组合齿的聚晶金刚石层处在两f>DC齿的硬质合金本体的中间,形成前后都有硬质合金本体中间是聚晶金刚石层的组合齿。 [0014] Shu, PDC combination on this patent by a single cone bit teeth two phase polycrystalline diamond layer bonded! ^ Tooth configuration, PDC polycrystalline diamond layer combination of teeth in two hard f> DC teeth alloy intermediate body, both before and after the formation of an intermediate cemented carbide body is a polycrystalline diamond layer of the tooth composition. PDC组合齿在刮切破岩过程中,无论组合齿相对岩石的刮切方向如何,各PDC齿的聚晶金刚石层均不会像普通单颗roc齿那样使本体在前聚晶金刚石层在后刮切岩石。 PDC combination teeth scrape rock breaking process, regardless of the combination of teeth scraping rock opposite direction, the teeth of each of the polycrystalline diamond PDC layer are not as common as the main body roc single tooth polycrystalline diamond layer in the front scraping rock. PDC组合齿的两颗PDC齿的聚晶金刚石层是相互紧密贴合的,当一颗roc齿的本体在前聚晶金刚石层在后时,另一颗PDC齿的聚晶金刚石层将在前而本体在后,刮切过程中总有本体在后推持支撑着聚晶金刚石层。 PDC combination of two teeth PDC cutter polycrystalline diamond layer is in close contact with each other, and a roc teeth when the front body in the polycrystalline diamond layer, further a polycrystalline diamond PDC cutter front layer after the body, there are always scraped during holding body after the thrusting supporting polycrystalline diamond layer. 这样,无论切削齿相对岩石的运动方向如何改变,PDC组合齿都不会像单颗独立的PDC齿那样发生聚晶金刚石层的崩裂或脱落。 Thus, regardless of the relative direction of movement of the cutting teeth changing how the rock, PDC composition tooth chipping or peeling will not occur as polycrystalline diamond layer as separate single PDC cutter. 另外,牙轮上的PDC组合齿由两颗PDC齿组合构成,其耐磨性远远高于普通牙轮钻头上采用的硬质合金齿。 Further, PDC cutters on the combination of teeth is constituted by a combination of two teeth PDC, which is much higher than the wear resistance of the cemented carbide used in ordinary tooth rock bit. 因此,PDC组合齿应用在单牙轮钻头的牙轮上将能明显提高钻头牙齿的耐磨性,进而提高钻头的使用寿命。 Thus, the PDC cutters used in combination on a single tooth roller bits can significantly improve the wear resistance of the bit teeth, thereby increasing the service life of the drill bit.

[0015] 2、本专利的PDC组合齿采用两颗PDC齿组合而成的四层夹心结构(本体-聚晶金刚石层^晶金刚石层-本体),可以直接采用现有PDC齿直接组合而成,最为简单高效。 [0015] 2, the combination of the present patent PDC PDC cutter teeth using a combination of two four-layer sandwich structure (bulk - ^ polycrystalline diamond layer is polycrystalline diamond layer - of the body), can be directly used conventional direct combination of PDC cutter The most simple and efficient. 根据本专利前述内容,本领域技术人员可知,作为本专利结构的一种容易想到的替代:三层夹心结构(本体—聚晶金刚石层-本体),这种结构可以想到的两种实现方式,一种是直接整体成型, 这=方案理论上可以实现,但由于实际加工过程过于困难,几乎无法实现,无法具备本专利在产业上应用的显著便利高效优势;另一种是现有roc齿与单独本体的组合,同样地,需要额外设计加工一个单独的本体,无法具备本专利在产业上应用的显著便利高效优势。 According to this patent the foregoing, those skilled in the art that, as an alternative configuration of the present patent readily occur: a three-layer sandwich structure (bulk - polycrystalline diamond layer - of the body), such a structure may be conceivable implemented in two ways, one is directly integrally formed, it can be achieved theoretically = scheme, but the actual process too difficult, almost impossible, can not have a significant advantage of the convenient and efficient industrial patent application; other existing teeth roc a combination of a separate body, in the same manner, the need for additional design and processing a single body, can not have a significant advantage of the present patent facilitate efficient in industrial applications. 这是因为,PDC齿的聚晶金刚石层与单独的本体直接贴合,当PDC齿反向刮切时,单独本体为齿的聚晶金刚石层提供的是接触式的机械推力,单独本体与聚晶金刚石层未形成紧密融合,PDC齿的聚晶金刚石层受反向作用力刮切磨损时,聚晶金刚石层的磨损脱落与单独的PDC齿反向刮切时的磨损脱落类似。 This is because, the PDC cutter polycrystalline diamond layer bonded directly to a separate body, when the reverse scraping PDC cutter, a separate body is a polycrystalline diamond layer of the tooth is provided a contact type mechanical thrust, the body alone with poly the polycrystalline diamond layer is not formed close integration, PDC cutter polycrystalline diamond layer by reverse scraping force, fretting wear of the polycrystalline diamond layer is detached when the individual PDC cutter reverse scraping off the like. 单独本体只能给聚晶金刚石层机械推力,而不能提供保持作用。 Only a single body of polycrystalline diamond layer to a mechanical thrust, and does not provide holding action. 而本专利由两颗PDC齿组合而成,无论切削齿朝那个方向运动,组合齿总有一颗roc 齿为聚晶金刚石层在前本体在后的顺向刮切,该齿的本体为两颗PDC齿提供推持力的同时, 还能为自身的聚晶金刚石层提供保持力,因为本体与聚晶金刚石层是通过化学的、物理的反应后结合在一起的,其相互融合渗透,本体与聚晶金刚石层之间具有化学键的作用力。 And this patent is made by a combination of two PDC cutter, the cutting teeth, whether movement in that direction, the teeth there is always a combination of the polycrystalline diamond layer roc toothed front body tangentially along the blade in the body of the tooth is two PDC cutter is provided to push the holding force, while also providing for the self-holding force of the polycrystalline diamond layer, since the body and the polycrystalline diamond layer is formed by the physical reaction of the chemically bonded together, their mutual fusion penetration, body and a force having a chemical bond between the polycrystalline diamond layer. 本体对聚晶金刚石层的这种保持力使roc齿磨损缓慢,组合齿的一颗roc齿缓慢磨损会减缓另一颗齿的磨损,从而提高整颗组合齿的性能和寿命。 This holding force of the body of polycrystalline diamond layer is so slow roc tooth wear, a combination of the teeth will wear slowly slow roc another tooth one tooth wear, thereby improving the performance and longevity of the combination of teeth whole pieces. 此外,作为一种变形,曾有在单颗PDC齿的本体圆柱面上设置少量聚晶金刚石,聚晶金刚石陷入本体的深度在2mm以内,小于圆柱直径的五分之一,本体圆柱面上设置的聚晶金刚石距本体端面上的聚晶金刚石层的距离(沿PDC齿圆柱轴向)大于2mm,但这种方案很快被淘汰。 Further, as a modification, there is provided a small amount of the polycrystalline diamond body in a single cylindrical surface of a PDC cutter, the depth into the polycrystalline diamond body is within 2mm, less than one fifth of the diameter of the cylinder is provided a cylindrical surface of the body the polycrystalline diamond layer is polycrystalline diamond distance from the end surface of the body is greater than 2mm (PDC spur along the axial direction), but this scheme will soon be eliminated. 原因是:这种f>DC齿的圆柱面上设置少量的聚晶金刚石,为的是减缓PDC齿在研磨性强的地层中的磨损速度,但由于圆柱面上的聚晶金刚石与本体端面上聚晶金刚石层必须设置一段距离(大于2mm,为端面上的聚晶金刚石层提供有效的本体,避免聚晶金刚石层无足够的本体支撑和保持强度),较大的距离使roc齿的承压面大大增大,而PDC齿能高效刮切破岩的前提是PDC齿能先吃入(侵入)岩石,该方案使roc齿无法有效吃入地层,同时也抵消了roc齿的自锐功能,降低了pdc齿的破岩效率,因此使用效果不佳,很快被淘汰。 The reason is: provided that a small amount of polycrystalline diamond f> DC toothed cylindrical surface, in order to slow down the wear rate in the PDC cutter strong abrasive formations, but the cylindrical surface of the polycrystalline diamond and the end surface of the body polycrystalline diamond layer must be set to a distance (greater than 2mm, the polycrystalline diamond layer is provided as an end face of the body effectively avoid the polycrystalline diamond layer and the supporting body without a sufficient holding strength), so that a greater pressure from the teeth roc greatly increases the surface, while efficiently scraping PDC cutter breaking rock can eat PDC cutter is provided in (intrusion) of rock, so that the program can not be effectively roc teeth bite into the formation, but also the self-sharpening function roc offset teeth, reducing the efficiency of the rock breaking pdc teeth, so use of ineffective, soon be eliminated. 本专利的roc组合齿由两颗聚晶金刚石层紧密贴合的pdc齿构成,能避免上述问题,且简单高效。 roc by the combination of two teeth present patent polycrystalline diamond compact layer bonded pdc tooth formation, the above problem can be avoided, and simple and efficient.

[0016] 3、PDC齿在刮切工作时具有良好的自锐性,聚晶金刚石层的磨损速度明显慢于本体。 [0016] 3, PDC teeth have good self-sharpening cutting blade when working, the wear rate of the polycrystalline diamond layer is significantly slower than the body. PDC组合齿由两颗聚晶金刚石层相贴合的PDC齿构成,PDC组合齿的中间硬,耐磨性高,两边的本体相对软,耐磨性弱,这便于PDC组合齿的中间出刃,使roc组合齿能始终保持中间金刚石的良好出露。 PDC cutter PDC combination of two teeth of the polycrystalline diamond layer bonded phase configuration, a combination of intermediate tooth PDC hard, high wear resistance, the relatively soft sides of the body, the wear resistance is weak, which facilitates the combination of PDC intermediate tooth of the blade, roc composition so that the teeth can always maintain a good intermediate exposed diamond. 单牙轮钻头上的切削齿在钻头破岩工作过程中,切削齿相对岩石之间的刮切方向在不断变化(牙轮恒接触区上的切削齿刮切破岩时相对岩石的刮切方向在0〜 360 °之间不断变化;牙轮交替接触区上的切削齿在刮切破岩时相对岩石的刮切方向在〇〜 180°之间变化),牙轮上的硬质合金齿在刮切方向不断变化的过程中齿顶菱角会被磨圆钝化,刮切效率降低。 Scraping direction relative to the rock cutters when breaking rock scraping the cutting teeth on the drill bit single cone rock breaking operation, the cutting teeth opposite direction between the scrape rock changing (the roller contact region constant changing between 0~ 360 °; alternate cutting teeth on the roller contact region scraping direction relative to the rock varies between 180 ° 〇~ when scraping rock breaking), carbide teeth on the cone changing process scraping direction is rounded tooth tips chestnut passivated, reduced scraping efficiency. PDC组合齿用于单牙轮上,无论切削齿的刮切方向如何变化,其都能保持齿顶自锐,金刚石出露刮切破岩,使齿顶始终保持锐利状态避免钝化,其相对硬质合金齿更易于侵入岩石、更易于刮切破岩。 PDC combination for the teeth on a single cone, regardless of how the scraping direction of the cutting teeth changes, which can maintain the tooth tip self-sharpening, scraping the exposed diamond rock breaking, the teeth remain sharp top avoid passivation state, which is relatively the invading carbide tooth easier and easier to scrape rock breaking. 因此,单牙轮钻头的牙轮上使用PDC组合齿能明显提高钻头使用寿命的同时,提高钻头切削齿的刮切效率和钻头的破岩效率。 Thus, using a combination of PDC on a single tooth can be significantly improved roller cone bits of bit life at the same time, improve the efficiency of rock-breaking drill bit cutting teeth scraping efficiency and drills. 特别是本专利中组合齿靠近牙轮部分的厚度大于远离牙轮部分的厚度,最远离牙轮的尖端部分的两侧本体厚度均小于中间聚晶金刚石层厚度的2倍,固定于牙轮内的两侧本体厚度均大于中间聚晶金刚石层厚度的3倍,由此组合齿形成纵断面轮廓上尖下宽的形式。 In particular, the combination of tooth thickness near patent cone portion is greater than the thickness remote from the cone portion, the thickness of both sides of the body portion farthest from the tip of the cone is less than twice the thickness of the intermediate layer of polycrystalline diamond is fixed to the inner cone the sides of the body greater than the thickness of the intermediate layer of polycrystalline diamond three times the thickness, thereby forming the combination of teeth on the profile contour in the form of a wide tip. 与牙轮固结的下部两侧本体层厚度均远大于聚晶金刚石层,为聚晶金刚石层提供了更好的稳固力,而作为朝向井底的工作部位的上部,其两侧本体层又均非常薄(乃至极限厚度逼近零)使得组合齿在井底工作时,尖部两侧的本体层很薄,组合齿吃入(侵入)岩石时的比压高,易于吃入岩石,也有利于本体的较快磨损而出露出中间的聚晶金刚石层,使得聚晶金刚石层能尽快出露而有效地吃入地层,并利用PDC齿的自锐性能提闻刮切效率。 Consolidation and a lower roller both sides of the body is much larger than the layer thickness of the polycrystalline diamond layer, provides better stability for the polycrystalline diamond layer forces, and as working toward the bottom portion of the upper portion and both sides of the body layer are very thin (even approaches zero thickness limit) such that the combined work at the bottom of the teeth, the body layer on both sides of the thin portion of the tip, the teeth bite into composition (invasive) is higher than the pressure at the rock, the rock is easy to eat, has conducive to rapid wear out of the body exposed to the intermediate layer of polycrystalline diamond, the polycrystalline diamond layer can be such that the exposed quickly and effectively bite into the formation, and using self-sharpening properties of PDC teeth provide audible scraping efficiency.

[0017] 4、由于单牙轮钻头上的切削齿在钻头体旋转及牙轮自身旋转的复合运动下相对岩石刮切运动,牙轮上的切削齿相对井底岩石的刮切方向在不断变化。 [0017] 4, since the cutting teeth on the single cone drill bit body is rotated in the cone itself and the relative rotational movement of the rock complex scraping motion, scraping direction relative to the cutting teeth on the roller cone rock bottom changing . 本专利中,PDC组合齿设置在牙轮上时,PDC组合齿的聚晶金刚石层贴合面的法线与牙轮上该roc组合齿设置点处的牙轮轮廓曲面的法线的夹角在75-90°之间。 In this patent, PDC composition when the teeth provided on the cone, PDC polycrystalline diamond layer composition tooth angle of the normal of the bonding composition roc teeth provided at a point on the curved surface of the cone contour normal and the cone surface between 75-90 °. 即组合齿贴合面的法线与设置点处的牙轮轮廓曲面的法线垂直或接近垂直,也即组合齿的聚晶金刚石层贴合面与设置点处的牙轮轮廓曲面的法线平行或接近平行。 Tooth paste composition that is perpendicular to the normal to the surface contour of the cone at the normal set point or near vertical engaging surface, i.e., a combination of normal fit engagement surface provided at the point of roller surface contour of the teeth of the polycrystalline diamond layer parallel or nearly parallel. 这样能确保牙轮上的组合齿在刮切方向不断变化的复杂运动下,组合齿的聚晶金刚石层始终以垂直或接近于垂直的方向侵入(吃入)岩石进行刮切破岩(类似于图7中PDC齿的刮切方式),组合齿的聚晶金刚石层与两侧的本体能同时磨损,且磨损方向沿着聚晶金刚石层贴合面的方向(垂直于聚晶金刚石层贴合面的法线方向)。 This ensures that the combination of teeth on the cone in a complex scraping motion changing direction, the teeth of the polycrystalline diamond layer composition is always perpendicular or nearly perpendicular to the direction of intrusion (bite into) scraping rock breaking rocks (similar to FIG. 7 embodiment scraping teeth PDC), a combination layer of polycrystalline diamond teeth present on both sides at the same time physical wear and abrasion fit direction along the direction of bonding surface layer of polycrystalline diamond (polycrystalline diamond layer perpendicular to the bonding plane normal direction). 其能使组合齿充分利用PDC良好的刮切性能和自锐性。 Which enables full use of the excellent combination of PDC tooth scraping performance and self-sharpening. 若非上述设置方式,PDC组合齿将会先磨损某一侧本体,待本体磨损之后,然后再磨损聚晶金刚石层,这将无法利用PDC齿优良的刮切性能和自锐性,相反还会降低单牙轮钻头的破岩效率。 If not the above-described arrangement, a combination of PDC teeth will wear to one side of the body, the body until after the wear, abrasion and then the polycrystalline diamond layer, it will not use the excellent properties of PDC cutting teeth and the blade self-sharpening, but it will also reduce the rock breaking efficiency of single cone bit. 因此,本专利能充分利用PDC齿的优点,提尚钻头性能。 Accordingly, the present patent can take full advantage of the PDC cutter, the drill bit is still provide performance.

[0018] 5、单牙轮钻头只有一个牙轮,易于小井眼化,本应是深井、超深井钻井中很好的钻井工具,但由于单牙轮钻头现有的切削齿耐磨性差,刮切破岩效率较低,限制了单牙轮钻头的应用效果,因此在钻井施工中已慢慢很少使用单牙轮钻头了。 [0018] 5, only a single roller cone bit, of slim hole easily, should be deep, ultra deep well drilling drilling tool, but due to the conventional single-cone bit cutting teeth poor abrasion resistance, scratch low-cut rock breaking efficiency, the effect of limiting the application of the single cone bit, so slowly been rarely used single cone drill bit in the drilling. 本专利的PDC齿以聚晶金刚石层相贴合的方式形成PDC组合齿,使极适合于以刮切形式破岩的PDC齿能应用在单牙轮钻头上,提高了钻头的破岩效率和使用寿命,这将扩宽单牙轮钻头的使用范围,增强单牙轮钻头在钻井中(特别是深井中)的应用价值。 In this patent PDC cutter with a polycrystalline diamond layer bonded form fit manner PDC combination of teeth, so that electrode adapted to scrape the form of PDC cutter breaking rock can be applied on a single cone bit, improve the efficiency of the drill bit and rock breaking life, which will widen the scope of a single cone bit, to enhance the value of single-cone bit in drilling (especially in deep wells) of. 同时,因为单牙轮钻头主要是刮切破岩,单牙轮上的切削齿在井底刮切很长的时间和距离(交替接触区上的切削齿)再切出井底或一直在井底刮切(恒接触区上的切削齿),单牙轮钻头与roc组合齿的结合,能够更适合PDC组合齿作用的发挥;而其他多牙轮钻头或牙轮与其他切削结构复合的复合钻头,由于牙轮主要是冲压破岩,PDC齿不适合于冲压破岩,PDC组合齿的作用无法充分发挥。 Meanwhile, because the single cone bit is primarily scraping rock breaking, cutting teeth on the single cone at the bottom scraping a long time and distance (alternate cutting teeth on the contact area) and then cut out the bottom or in the bottom has been , binding scraping single cone (constant cutting teeth on the contact area) with the bit combination roc teeth, the teeth can be more appropriate to play the role of PDC combinations thereof; or other multi-cone roller cone bit cutting structure of the composite compound with other drills , due mainly stamping cone rock breaking, PDC teeth are not suitable for press-breaking rock, PDC combination of teeth can not give full play to the role.

[0019] 作为选择,本专利的牙轮为球状。 [0019] Alternatively, the present patent is a spherical cone.

[0020]作为选择,PDC组合齿的聚晶金刚石层贴合面的法线与牙轮上该PDC组合齿设置点处的牙轮轮廓曲面的法线的夹角为90° (即两法线垂直)。 [0020] Alternatively, the combination of teeth polycrystalline diamond PDC layer attached to the surface normal to the cone angle of the engagement combination of PDC normal tooth point disposed at a profile surface of the cone is 90 ° (i.e., normal to the two vertical).

[0021] 作为选择,PDC组合齿的聚晶金刚石层平面与过该PDC组合齿设置点的轴平面之间的夹角在45-90°;进一步地,PDC组合齿的聚晶金刚石层平面与过该PDC组合齿设置点的轴平面之间的夹角在60-90°;更进一步地,PDC组合齿的聚晶金刚石层平面与过该H)C组合齿设置点的轴平面之间的夹角在75-90°;特别地,PDC组合齿的聚晶金刚石层平面与过该PDC 组合齿设置点的轴平面垂直。 The angle between the axial plane [0021] Alternatively, the combination of teeth polycrystalline diamond PDC layer plane and through the combination of teeth disposed PDC point at 45-90 °; Further, the combination of teeth polycrystalline diamond PDC layer plane PDC is provided through the combination of teeth included angle between the axis plane at the point of 60-90 °; Still further, combinations of the polycrystalline diamond PDC layer plane through the tooth and H) C plane of a combination gear shaft disposed between the point included angle 75-90 °; in particular, a combination of polycrystalline diamond PDC layer plane of the teeth and the axis perpendicular to the plane through the tooth PDC composition set point. 本专利的PDC组合齿在牙轮上可以有各种布置方向/角度,牙轮上的切削齿在井底刮切的距离很长,且刮切过程中切削齿相对井底岩石的刮切方向在不断地变化,PDC组合齿的聚晶金刚石层平面与过该PDC组合齿设置点的轴平面夹角较大或垂直时,PDC组合齿在井底刮切岩石的刮切量(刮切岩石的体积)比较小夹角时大,其中來日日金刚石层平面与过该PDC组合齿设置点的轴平面的夹角接近90。 The compositions of this patent teeth on PDC cutters may be arranged in various direction / angle of the cutting teeth on the cone at the bottom scraping long distance, and the cutting teeth during the cutting blade relative to the direction of scraping rock bottom is constantly changing, a combination of PDC polycrystalline diamond layer plane of the teeth when the teeth are arranged point by combining the PDC axial plane perpendicular angle or larger, the teeth in the combination of PDC rock bottom scraping blade cutting amount (scraping rock volume) is relatively small when a large angle, wherein the diamond layer to Japan Japanese plane through the axis plane angle setpoint combination teeth 90 close the PDC. 或垂直时的布置方向/角度最佳,能够最大化发挥PDC组合齿的刮切能力。 The direction perpendicular to the arrangement or / angle best combination to maximize play PDC teeth scraping ability.

[0022]作为选择,PDC组合齿设置在牙轮的恒接触区上。 [0022] Alternatively, PDC combination of teeth disposed on the contact region of constant cone. 该方案中,单牙轮钻头破岩工作过程中,牙轮恒接触区上的切削齿始终与井底接触破岩,其磨损速度快于其他区域上的切削齿。 In this embodiment, the single cone rock breaking operation, the cutting teeth on the cone constant contact area is always in contact with the bottom rock breaking, the wear on the cutting teeth faster than other regions. 牙轮的恒接触区上设置PDC组合齿将能明显提高该区域切削齿的耐磨性和刮切效率, 从而提高钻头的使用寿命和破岩效率。 The combination of teeth disposed PDC cutters constant contact region can significantly improve the wear resistance and the scraping efficiency of the region of the cutting teeth, thereby increasing the life of the drill bit and the rock breaking efficiency.

[0023]作为选择,PDC组合齿设置在牙轮的交替接触区上。 [0023] Alternatively, PDC composition disposed on alternating teeth contact region of the cone. 该方案中,DC组合齿设置在牙轮的交替接触区上将能明显提高该区域切削齿的耐磨性和刮切效率。 In this embodiment, DC alternating combination of teeth disposed on the contact region can significantly improve the wear resistance of the roller and the scraping efficiency of the region of the cutting teeth.

[0024] 作为选择,PDC组合齿的两侧本体的外侧被斜切,形成上窄下宽的楔形结构的PDC 组合齿。 [0024] Alternatively, the outer sides of the body of the tooth is chamfered PDC combination, a combination of PDC teeth formed on the wedge structure of narrow width. 该方案中,上窄下宽的楔形结构使roc组合齿的上部更窄(薄)更尖锐,有利于roc组合齿侵入岩石提高钻头破岩效率。 In this embodiment, the narrow width of the wedge structure of the upper teeth roc composition narrower (thinner) sharper teeth facilitate the invading composition roc rock breaking efficiency is improved.

[0025] 作为选择,PDC组合齿的两侧本体的外侧被内凹曲线切除,形成上窄下宽结构的PDC组合齿。 [0025] Alternatively, the outer sides of the body is cut PDC combination of concave curves of the teeth, the teeth forming composition PDC narrow width structure. 该方案中,PDC组合齿的两端本体被内凹曲线切除,使PDC组合齿的上部更尖锐, 有利于PDC组合齿侵入岩石提高钻头破岩效率。 In this embodiment, both ends of the PDC body composition is cut concave curves of the teeth, the teeth of the upper PDC composition sharper teeth facilitate the invading composition PDC rock breaking efficiency is improved. 同时,两端本体被内凹曲线切除的PDC组合齿,从齿顶往下齿厚的增加缓慢。 Meanwhile, both ends of the body is concavely curved cut teeth PDC composition, gradually increases from the tooth tip tooth thickness down. 当PDC组合齿有磨损时,两侧本体内凹切除能减缓切削齿齿厚增大的速度,使磨损后的切削齿能持续保持较薄的齿顶厚,保持切削齿侵入岩石的能力,有利于提高钻头的破岩效率。 When the composition PDC wear tooth, the concave sides of the body to slow the cutting teeth of the cutting speed increased thickness, so that the wear of the cutting teeth can continue to maintain a relatively thin thickness of the tooth tip, the cutting teeth holding capacity of the invading with rock breaking will help improve the efficiency of the drill bit.

[0026] 作为进一步选择,PDC组合齿的两侧本体被多段曲线组合而成的内凹曲线切除,形成上窄下宽结构的PDC组合齿。 [0026] As a further option, a combination of PDC teeth are cut sides of the body curve of the multistage combination of concave curves, a combination of PDC teeth formed on the narrow width structure.

[0027] 作为另一进一步选择,PDC组合齿的两侧本体被由曲线和直线组合而成的内凹曲线切除,形成上窄下宽结构的PDC组合齿。 [0027] As yet a further option, a combination of sides of the body PDC teeth are cut by a combination of curves and straight lines formed by concave curves, a combination of PDC teeth formed on the narrow width structure.

[0028] 前述本发明主方案及其各进一步选择方案可以自由组合以形成多个方案,均为本发明可采用并要求保护的方案;以及本发明的各非冲突选择之间以及和其他选择可以任意组合,本领域技术人员在了解本发明方案后根据现有技术和公知常识可明了有多种组合, 均为本发明所要保护的技术方案,在此不做穷举。 [0028] the primary embodiment of the present invention and its further options can be freely combined to form various embodiments, the present invention may employ both the program and claimed; and non-conflict between the present invention and select the other options and may be any combination thereof, those skilled in the art in the understanding of the present invention according to the prior art and common knowledge there are a variety of combinations may be appreciated, both the claimed technical solution of the present invention, which is not exhaustive.

附图说明 BRIEF DESCRIPTION

[0029]图1为本发明实施例1的结构示意图; [0029] Figure 1 schematic structural diagram of an embodiment of the invention;

[0030]图2为本发明实施例1的PDC组合齿结构示意图; [0030] FIG. 2 PDC Example 1 a schematic view of a combination of toothing of the embodiment of the present invention;

[0031]图3为本发明实施例2的PDC组合齿的结构示意图; [0031] Fig 3 a schematic view of the structure of Example 2 combined PDC teeth embodiment of the invention;

[0032]图4为本发明实施例3的roc组合齿的结构示意图; [0032] Fig 4 a schematic view of the structure of Example 3 roc combination teeth embodiment of the invention;

[0033]图5为单牙轮钻头的牙轮与井底岩石接触时的接触区域划分示意图; [0033] FIG. 5 when the contact area is a single roller cone bit in contact with rock bottom schematic division;

[0034]图6为常规PDC齿结构示意图; [0034] FIG. 6 is a schematic view of a conventional PDC cutter structure;

[0035]图7为常规PDC齿正常刮切破岩时的示意图; [0035] FIG. 7 is a schematic view of a conventional PDC cutter during normal cutting blade rock breaking;

[0036]图中:1、钻头体,2、牙轮,21、恒接触区,22、交替接触区,3、PDC组合齿;31、本体, 32、聚晶金刚石层;4、岩石。 [0036] FIG: 1, bit body 2, roller 21, constant contact region 22, alternating contact regions, 3, PDC combination of teeth; 31, a body 32, a polycrystalline diamond layer; 4, Rock.

具体实施方式 Detailed ways

[0037] 下列非限制性实施例用于说明本发明。 [0037] The following non-limiting examples serve to illustrate the present invention.

[0038] 实施例1: [0038] Example 1:

[0039] 参考图1、2所示,一种具有PDC组合齿的单牙轮钻头,包括钻头体1和牙轮2,牙轮2 与钻头体1为转动连接,牙轮2上设置有切削齿,牙轮2上的切削齿至少有一颗为PDC组合齿3,作为优选,牙轮2上的切削齿全部为PDC组合齿3 (参考图1所示);PDC组合齿3由两颗PDC齿组合而成,PDC齿由本体31和覆盖本体31整个支撑面的聚晶金刚石层32构成(即图中聚晶金刚石层32覆盖本体31整个端面),两颗PDC齿的组合方式为聚晶金刚石层32紧密贴合,并由外侧的两本体31夹持呈四层夹心结构,且靠近牙轮部分的厚度大于远离牙轮部分的厚度, 参考图2所示,最远离牙轮的尖端部分的两侧本体厚度均小于中间聚晶金刚石层厚度W3 的2倍,固定于牙轮内的两侧本体厚度W2均大于中间聚晶金刚石层厚度W3的3倍;作为优选, 如本实施例所示,PDC组合齿的两侧本体31的外侧被斜切,形成上窄 [0039] With reference to FIG 1, having a single tooth PDC composition cone bit, comprising a bit body and a roller 2, a roller cone bit body 2 is pivotally connected, there is provided on the cutting roller 2 teeth, the cutting teeth on the roller 2 has a combination of a PDC teeth of at least 3, preferably, the cutting teeth on the cone 2 PDC all combinations of teeth 3 (see FIG. 1); 3 PDC combination of two teeth PDC combination of teeth, the teeth PDC polycrystalline diamond layer across the support surface of the body 31 by the body 31 and cover 32 configuration (i.e., the polycrystalline diamond layer in FIG. 32 covers the entire end face of the body 31), two teeth PDC combinations of polycrystalline the thickness of the diamond layer 32 into close contact with the outer body 31 by two four-layer sandwich structure was clamped and close away from the cone portion is greater than the thickness of the cone portion, with reference to FIG. 2, the tip portion farthest from the cone the sides of the body are less than 2 times the thickness of the intermediate layer thickness W3 of polycrystalline diamond is fixed to the sides of the body in a thickness W2 of polycrystalline diamond cutters are larger than the intermediate layer 3 has a thickness W3 of times; Advantageously, embodiments of the present embodiment as shows the outer sides of the body, the teeth of a combination of the PDC 31 is chamfered to form a narrow 宽的楔形结构的PDC 组合齿。 Wide combination PDC wedge structure teeth. PDC组合齿设置在牙轮上时,PDC组合齿的聚晶金刚石层贴合面的法线与牙轮上该PDC组合齿设置点处的牙轮轮廓曲面的法线的夹角在75-90°之间。 When the combination of teeth disposed on the PDC cutters, combination teeth polycrystalline diamond PDC layer bonded to an angle normal to the combination of PDC teeth provided at a point on the curved surface of the cone contour normal and the cone surface 75-90 between.

[0040] 实施例2: [0040] Example 2:

[0041] 本实施例与实施例1基本相同,其区别在于:PDC组合齿的两侧本体31的外侧被内凹曲线切除,形成上窄下宽结构的roc组合齿。 [0041] The present embodiment is substantially the same as Example 1, except that: PDC compositions outer sides of the body 31 of the tooth is cut concave curve, a combination of teeth formed roc the narrow width structure. 作为选择,参考图3所示,PDC组合齿的两侧本体31被多段曲线组合而成的内凹曲线切除,形成上窄下宽结构的PDC组合齿。 Alternatively, as shown with reference to FIG. 3, a combination of PDC sides of the body 31 is cut tooth curve multistage combination of concave curves, a combination of PDC teeth formed on the narrow width structure.

[0042] 实施例3: [0042] Example 3:

[0043] 本实施例与实施例1基本相同,其区别在于:PDC组合齿的两侧本体31的外侧被内凹曲线切除,形成上窄下宽结构的PDC组合齿。 [0043] The present embodiment is substantially the same as Example 1, except that: the outer sides of the body composition PDC tooth 31 is cut concave curve, a combination of PDC teeth formed on the narrow width structure. 作为选择,参考图4所示,PDC组合齿的两侧本体31被由曲线和直线组合而成的内凹曲线切除,形成上窄下宽结构的PDC组合齿。 Alternatively, with reference to FIG. 4, the tooth sides of the body composition of the PDC 31 is cut by a combination of curves and straight lines formed by concave curves, a combination of PDC teeth formed on the narrow width structure.

[0044] 实施例4: [0044] Example 4:

[0045] 参考图5所示,本实施例与实施例1至4基本相同,其区别在于:PDC组合齿设置在牙轮2的恒接触区21 (牙轮与井底始终接触的区域)上,或者,PDC组合齿设置在牙轮2的交替接触区22 (牙轮与井底交替接触的区域)上。 [0045] Referring to FIG. 5, the present embodiment and Examples 1-4 is substantially the same, except that: PDC composition disposed teeth 21 (with the bottom cone region is always in contact with) the constant contact area of ​​the roller 2 or, a combination of the PDC teeth disposed on alternating contact regions 22 of the roller 2 (the region in contact with the bottom of the cone are alternately).

[0046] 实施例5: [0046] Example 5:

[0047] 本实施例与实施例1至4基本相同,其区别在于:PDC组合齿的聚晶金刚石层平面与过该PDC组合齿设置点的轴平面垂直(g卩PDC组合齿相对图1中的roc组合齿旋转90°,图1中的PDC组合齿的聚晶金刚石层平面与过该roc组合齿设置点的轴平面平行或重合)。 [0047] Embodiment of the present embodiment is substantially the same as Example 1-4, except that: the combination of teeth polycrystalline diamond PDC layer plane and perpendicular to the plane through the axis of the tooth PDC composition set point (g Jie combination PDC opposite teeth 1 roc combination of tooth rotation 90 °, PDC FIG combination polycrystalline diamond layer of the tooth and the plane through the axis of the plane of the roc composition tooth point disposed parallel or coincident).

[0048]以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。 [0048] The foregoing is only preferred embodiments of the present invention but are not intended to limit the present invention, any modifications within the spirit and principle of the present invention, equivalent substitutions and improvements should be included in the present within the scope of the invention.

Claims (10)

1. 一种具有PDC组合齿的单牙轮钻头,包括钻头体和牙轮,牙轮与钻头体为转动连接, 牙轮上设置有切削齿,其特征在于:牙轮上的切削齿至少有一颗为PDC组合齿,PDC组合齿由两颗PDC齿组合而成,PDC齿由本体和覆盖本体支撑面60%以上区域的聚晶金刚石层构成,两颗PDC齿的组合方式为聚晶金刚石层紧密贴合,并由外侧的两本体夹持呈四层夹心结构,且靠近牙轮部分的厚度大于远离牙轮部分的厚度,最远离牙轮的尖端部分的两侧本体厚度均小于中间聚晶金刚石层厚度的2倍,固定于牙轮内的两侧本体厚度均大于中间聚晶金刚石层厚度的3倍;roc组合齿的聚晶金刚石层贴合面的法线与牙轮上该PDC组合齿设置点处的牙轮轮廓曲面的法线的夹角在75-90 °。 A single cone bit having PDC combination of teeth comprises a bit body and a roller, roller rotatably connected to the bit body, a roller cone is provided with a cutting tooth, wherein: the cone has cutting teeth on at least one of PDC is a combination gear teeth, the teeth PDC composition formed by a combination of two teeth PDC, PDC cutter polycrystalline diamond layer is more than 60% of the area of ​​the body and the cover support surface constituted by the body, two combinations for the PDC cutter polycrystalline diamond layer snug fit by holding the outside of the body form two four-layer sandwich structure, and near the cone portion is greater than the thickness remote from the cone portions, the thickness of both sides of the body farthest from the tip portion of the cone is less than the intermediate polycrystalline 2 times the thickness of the diamond layer, the thickness of the inner sides of the body fixed to the roller greater than the polycrystalline diamond layer three times the thickness of the intermediate; ROC combination of teeth attached to the polycrystalline diamond PDC layer combination with the normal of the roller engagement surface disposed at an angle normal to the tooth surface points in the contour cutters 75-90 °.
2. 如权利要求1所述的具有PDC组合齿的单牙轮钻头,其特征在于:PDC组合齿的聚晶金刚石层贴合面的法线与牙轮上该roc组合齿设置点处的牙轮轮廓曲面的法线的夹角为9〇°。 2. The single cone bit having PDC teeth composition according to claim 1, wherein: the combination of teeth PDC polycrystalline diamond layer is adhered to the upper roc cone engaging surface normal to a combination dental tooth disposed at a point angle normal to the surface contour of the wheel 9〇 °.
3.如权利要求1或2所述的具有PDC组合齿的单牙轮钻头,其特征在于:PDC组合齿的聚晶金刚石层平面与过该PDC组合齿设置点的轴平面之间的夹角在45-90°;所述轴平面是指过牙轮轴线的平面;过PDC组合齿设置点的轴平面是指既过PDC组合齿设置点又过牙轮轴线的平面。 PDC having a single cone bit teeth 3. The composition as claimed in claim 1 or 2, wherein: the combination of teeth polycrystalline diamond PDC layer plane and the angle between the axis of the plane of the PDC composition tooth point disposed over at 45-90 °; it refers to the axial plane through the axis of the roller plane; a plane through the axis of the tooth PDC composition set point through PDC refers to both set point and the combination of teeth plane through the axis of the cone.
4. 如权利要求3所述的具有PDC组合齿的单牙轮钻头,其特征在于:PDC组合齿的聚晶金刚石层平面与过该PDC组合齿设置点的轴平面之间的夹角在60-90°。 PDC having a single cone bit teeth 4. The composition as claimed in claim 3, wherein: the angle between the axial planes of the polycrystalline diamond PDC layer composition tooth plane through the combination of teeth disposed PDC point 60 -90 °.
5. 如权利要求4所述的具有PDC组合齿的单牙轮钻头,其特征在于:PDC组合齿的聚晶金刚石层平面与过该PDC组合齿设置点的轴平面垂直。 Single cone having teeth PDC composition as claimed in claim 4 of the drill bit, wherein: a combination of polycrystalline diamond PDC layer plane of the teeth and the axis perpendicular to the plane through the tooth PDC composition set point.
6. 如权利要求1所述的具有PDC组合齿的单牙轮钻头,其特征在于:PDC组合齿设置在牙轮的恒接触区上。 PDC having a single cone teeth of a combination as claimed in claim 1, said drill bit, wherein: the combination of teeth disposed on the PDC constant contact area of ​​the cone.
7. 如权利要求1所述的具有PDC组合齿的单牙轮钻头,其特征在于:PDC组合齿设置在牙轮的交替接触区上。 PDC single cone having teeth 7. The composition as claimed in claim 1, said drill bit, wherein: PDC composition disposed on alternating teeth contact region a cone.
8. 如权利要求1所述的具有PDC组合齿的单牙轮钻头,其特征在于:PDC组合齿的两侧本体的外侧被斜切,形成上窄下宽的楔形结构的roc组合齿。 PDC single cone having teeth 8. The composition as claimed in claim 1 bit, wherein: the outer sides of the body of the tooth is chamfered PDC combination, formed on the narrow width of the wedge structure teeth roc composition.
9. 如权利要求1所述的具有PDC组合齿的单牙轮钻头,其特征在于:PDC组合齿的两侧本体的外侧被内凹曲线切除,形成上窄下宽结构的roc组合齿。 Single cone having teeth PDC composition as claimed in claim 1, said drill bit, wherein: the outer sides of the body is cut PDC combination of concave curves of the teeth, the teeth forming composition roc the narrow width structure.
10. 如权利要求9所述的具有PDC组合齿的单牙轮钻头,其特征在于:PDC组合齿的两侧本体被多段曲线组合而成或由曲线和直线组合而成的内凹曲线切除,形成上窄下宽结构的PDC组合齿。 PDC having a single cone 10. The combination of the teeth of the drill bit of claim 9, wherein: PDC tooth sides of the body composition is a combination of multi-segment curve formed by a combination of curves and straight lines or concave curves formed by cutting, PDC structure forming the narrow width of the teeth in combination.
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CN201835753U (en) * 2010-06-29 2011-05-18 泰州市宝锐石油设备制造有限公司 Polycrystalline diamond compact for rock-breaking tool for drilling
CN103939022A (en) * 2014-04-10 2014-07-23 河北驰恒钻头制造有限公司 Combined drill bit combining PDC drill bit and roller bit for joint rock breaking
CN204386476U (en) * 2015-01-15 2015-06-10 西南石油大学 Non-planar combined PDC reinforcing teeth-based mono-cone bit

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* Cited by examiner, † Cited by third party
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SU1599517A1 (en) * 1979-09-17 1990-10-15 В.Г.Смирнов и В.С.Травкин Tooth of roller bit
US5706906A (en) * 1996-02-15 1998-01-13 Baker Hughes Incorporated Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped
CN1594825A (en) * 2004-06-23 2005-03-16 江汉石油钻头股份有限公司 Cone single roller bit
CN201835753U (en) * 2010-06-29 2011-05-18 泰州市宝锐石油设备制造有限公司 Polycrystalline diamond compact for rock-breaking tool for drilling
CN103939022A (en) * 2014-04-10 2014-07-23 河北驰恒钻头制造有限公司 Combined drill bit combining PDC drill bit and roller bit for joint rock breaking
CN204386476U (en) * 2015-01-15 2015-06-10 西南石油大学 Non-planar combined PDC reinforcing teeth-based mono-cone bit

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