WO2018166191A1 - 一种钻探用高效排屑预成形聚晶金刚石复合片 - Google Patents

一种钻探用高效排屑预成形聚晶金刚石复合片 Download PDF

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Publication number
WO2018166191A1
WO2018166191A1 PCT/CN2017/105474 CN2017105474W WO2018166191A1 WO 2018166191 A1 WO2018166191 A1 WO 2018166191A1 CN 2017105474 W CN2017105474 W CN 2017105474W WO 2018166191 A1 WO2018166191 A1 WO 2018166191A1
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WIPO (PCT)
Prior art keywords
polycrystalline diamond
chip evacuation
cutting edge
diamond compact
chip
Prior art date
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PCT/CN2017/105474
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English (en)
French (fr)
Inventor
赵东鹏
杜卫锋
牛同健
文腾飞
张春林
方海江
Original Assignee
河南四方达超硬材料股份有限公司
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Application filed by 河南四方达超硬材料股份有限公司 filed Critical 河南四方达超硬材料股份有限公司
Publication of WO2018166191A1 publication Critical patent/WO2018166191A1/zh
Priority to US16/297,718 priority Critical patent/US20190203539A1/en
Priority to US17/170,869 priority patent/US11873684B2/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/5673—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a non planar or non circular cutting face

Definitions

  • the invention belongs to the technical field of super-hard composite materials, and particularly relates to a high-efficiency chip removal pre-formed polycrystalline diamond composite sheet for drilling, which is mainly used in the fields of oil drilling, engineering excavation and prospecting.
  • Diamond is regarded as an ideal drilling material and cutting material because of its high hardness and wear resistance, and the advent of polycrystalline diamond compact (PDC) has become an important milestone in the history of diamond application technology.
  • PDC polycrystalline diamond compact
  • PCD composite sheets have been used as super wear-resistant cutting elements in tools such as rotary drill bits and diamond drill bits, and are widely used in petroleum and natural gas drilling.
  • oil and gas such as shale oil, gas, etc.
  • the design of drill bits used in deeper complex formations and the performance of polycrystalline diamond compacts need to be continuously improved, especially drilling.
  • Hard rock formations, tough interlayers and other strata often lead to serious drilling accidents such as chipping and even stuck drilling due to difficulty in footage and unsmooth debris.
  • the patent CN200820070865.5 provides a solution to the problem of chipping due to crack propagation on the surface, and is not competent in efficient chip evacuation.
  • the invention provides a high-efficiency chip removal pre-formed polycrystalline diamond composite sheet for drilling, which utilizes the sharp cutting edge teeth and the smooth chip evacuation structure to comprehensively solve the problems of difficult drilling, chipping, mud bag and the like.
  • the object of the present invention is to provide a highly efficient chip evacuation pre-formed polycrystalline diamond compact for drilling by changing the upper surface and outer surface structure of the polycrystalline diamond layer of the PCD composite sheet, the PCD composite sheet.
  • it can overcome the difficulty of drilling, reduce the problem of chipping, avoid drilling accidents such as mud packs, improve the life of the drill bit and the stability of the drilling platform.
  • a high efficiency chip evacuation pre-formed polycrystalline diamond compact for drilling comprising a polycrystalline diamond layer and a cemented carbide support bonded to the polycrystalline diamond layer.
  • the polycrystalline diamond layer comprises an upper surface and an outer surface a rim surface, the upper surface and the outer edge surface forming a cutting edge and a chip evacuation groove at at least a portion of the boundary region
  • the cutting edge teeth are at an angle to the outer edge surface of the polycrystalline diamond layer and greater than or equal to 90 ⁇
  • the cutting edge has a tooth height of not less than 0.3 mm and a radial length of not less than 0.5 mm
  • the cutting edge and the chip evacuation groove are distributed in a ring shape in a radial direction.
  • the chip evacuation groove is at an angle to the outer edge surface of the polycrystalline diamond layer and is greater than or equal to 90°
  • the cutting edge, the chip flute groove and the outer edge surface are chamfered or chamfered.
  • the longitudinal angle between the cutting edge and the chip evacuation groove is less than 60°
  • the chip pocket is circular, square, or the like.
  • the chip groove depth is less than the polycrystalline diamond thickness 1/10
  • the present invention utilizes the high-efficiency chip removal pre-formed polycrystalline diamond composite sheet as a wear-resistant cutting component in the drilling and drilling process, and has a sharp cutting edge and a smooth chip evacuation groove or chip structure. It can reduce the grinding heat in the working area of the P CD composite sheet, reduce the chipping, avoid drilling accidents such as mud packs, and greatly improve the drilling drilling efficiency and the stability of the drilling platform.
  • FIG. 1 is a structural diagram of a high-efficiency chip evacuation pre-formed polycrystalline diamond compact sheet having no chip structure in the present invention.
  • FIG. 2 is a high-efficiency chip evacuation pre-formed polycrystalline diamond with a chip-chip structure according to the present invention. Structure of composite sheet
  • FIG. 3 is a schematic structural view of a four-blade high-efficiency chip evacuation pre-formed polycrystalline diamond compact
  • FIG. 4 is a schematic structural view of another high-efficiency chip discharge pre-formed polycrystalline diamond compact of four-blade teeth
  • FIG. 5 is a schematic structural view of a high-efficiency chip evacuation pre-formed polycrystalline diamond compact of a five-blade tooth
  • FIG. 6 is a schematic structural view of another high-efficiency chip evacuation pre-formed polycrystalline diamond compact of five-blade teeth
  • FIG. 7 is a schematic structural view of an eight-blade high-efficiency chip evacuation pre-formed polycrystalline diamond compact
  • FIG. 8 is a schematic structural view of another high-efficiency chip evacuation pre-formed polycrystalline diamond compact of eight-blade teeth
  • FIG. 9 is a schematic structural view of a high-efficiency chip evacuation pre-formed polycrystalline diamond compact of a ten-blade tooth
  • FIG. 10 is a schematic structural view of another high-efficiency chip ejection pre-formed polycrystalline diamond compact sheet of ten-blade teeth
  • FIG. 11 is a schematic structural view of a 12-blade high-efficiency chip evacuation pre-formed polycrystalline diamond compact
  • FIG. 12 is a schematic view showing the structure of another twelve-blade high-efficiency chip evacuation pre-formed polycrystalline diamond compact.
  • the present invention includes a polycrystalline diamond layer 100 and a cemented carbide support 200 bonded thereto.
  • the polycrystalline diamond layer 100 includes an upper surface 101 and an outer edge surface 102 that form a cutting edge 103 and a chip evacuation groove 104 at an at least partially border region with the outer edge surface 102. Further, as shown in Fig. 2, a chip recess 105 exists in the center portion of the upper surface of the polycrystalline diamond layer.
  • FIGS. 3 and 4 it is a high-efficiency chip evacuation pre-formed polycrystalline diamond composite sheet having a four-blade tooth having a similar structure.
  • the cutting edge 103 of the four-blade composite sheet has a radial extension length of 1.87 mm and a height of 1.23 mm, which is 90 degrees from the outer edge surface 102; and the chip evacuation groove 104 and the cutting edge tooth 103 is connected in a ring shape at 22° and has an angle of 112° with the outer edge surface 102.
  • the cutting edge 103, the chip removal groove 104 and the outer edge surface 102 have a chamfer of 0.35
  • the cutting edge 103 of the four-blade composite sheet has a radial extension length of 1.83 mm and a height of 1.23 mm, and the angle with the outer edge surface 102 is 99.5°; and the chip evacuation groove 104 and the cutting edge tooth 103 to 33.2. Connected in a ring shape with an angle of 123.2° from the outer edge surface 102.
  • the cutting edge 103, the chip evacuation groove 104 and the outer edge surface 102 have a chamfer of 0.35 mm.
  • Embodiments of the invention [0031] Embodiment 1
  • FIGS. 3 and 4 it is a high-efficiency chip evacuation pre-formed polycrystalline diamond composite sheet having a four-blade tooth having a similar structure.
  • the cutting edge 103 of the four-blade composite sheet has a radial extension length of 1.87 mm and a height of 1.23 mm, which is 90 degrees from the outer edge surface 102; and the chip evacuation groove 104 and the cutting edge tooth 103 is connected in a ring shape at 22° and has an angle of 112° with the outer edge surface 102.
  • the cutting edge 103, the chip removal groove 104 and the outer edge surface 102 have a chamfer of 0.35
  • the cutting edge 103 of the four-blade composite sheet has a radial extension length of 1.83 mm and a height of 1.23 mm, and the angle with the outer edge surface 102 is 99.5°; and the chip evacuation groove 104 and the cutting edge tooth 103 to 33.2. Connected in a ring shape with an angle of 123.2° from the outer edge surface 102.
  • the cutting edge 103, the chip evacuation groove 104 and the outer edge surface 102 have a chamfer of 0.35 mm.
  • FIGS. 5 and 6 it is a high-efficiency chip evacuation pre-formed polycrystalline diamond composite sheet having a five-blade tooth having a similar structure.
  • the cutting edge 103 of the five-blade composite sheet has a radial extension length of 1.91 mm and a height of 1.23 mm, which is 90 degrees from the outer edge surface 102; and the chip evacuation groove 104 and the cutting edge tooth 103 is connected in a ring shape at 20° and has an angle of 110° to the outer edge surface 102.
  • the cutting edge 103, the chip removal groove 104 and the outer edge surface 102 have a chamfer of 0.35
  • the cutting edge of the five-blade composite sheet has a radial extension length of 1.87 mm, height.
  • the angle to the outer edge surface 102 is 100.1°; and the chip evacuation groove 104 and the cutting edge tooth 103 are 35.
  • the 6° connection is annularly distributed and has an angle of 125.6° to the outer edge surface 102.
  • the chamfer between 104 and the outer edge surface 102 is 0.35 mm.
  • the high-efficiency chip removal pre-formed polycrystalline diamond compact sheets provided in the first embodiment and the second embodiment are suitable for drilling complex structures such as extremely hard rock layers and tough interlayers, especially extremely hard rock layers.
  • This multi-blade structure also greatly improves the utilization rate of the composite sheet and reduces the drilling cost.
  • FIGS. 7 and 8 it is an eight-blade high efficiency chip evacuation pre-formed polycrystalline diamond compact having a similar structure.
  • the cutting edge 103 of the eight-blade composite sheet has a radial extension length of 1.78 mm and a height of 1.23 mm, which is 90 degrees from the outer edge surface 102; and the chip evacuation groove 104 and the cutting edge tooth 103 is connected in a ring shape at 23° and has an angle of 113° with the outer edge surface 102.
  • Cutting edge 103, chip evacuation groove 104 The chamfer is 0.40 from the outer edge surface 102
  • the cutting edge 103 of the eight-blade composite sheet has a radial extension length of 1.76 mm and a height of 1.23 mm, and the angle with the outer edge surface 102 is 99.3°; and the chip evacuation groove 104 and the cutting edge tooth 103 to 32.8. Connected in a ring shape with an angle of 122.8° to the outer edge surface 102.
  • the cutting edge 103, the chip evacuation groove 104 and the outer edge surface 102 have a chamfer of 0.40 mm.
  • FIG. 9 it is a high-efficiency chip evacuation pre-formed polycrystalline diamond compact having a ten-blade tooth of similar construction.
  • the cutting edge 103 of the ten-blade composite sheet has a radial extension length of 1.69 mm and a height of 1.23 mm, and the angle from the outer edge surface 102 is 90°; and the chip evacuation groove 104 and the cutting edge tooth 103 is annularly connected at 25° and has an angle of 115° to the outer edge surface 102. Tooth cutting edge 103 chip evacuation recess 104 between the surface 102 and the chamfered outer edge of 0.40 mm. Referring to FIG.
  • the cutting edge 103 of the ten-blade composite sheet has a radial extension length of 1.68 mm and a height of 1.23 mm, and the angle with the outer edge surface 102 is 99.1 °; and the chip evacuation groove 104 and the cutting edge tooth 103 is connected in a ring shape at 36.5° and has an angle of 126.5° with the outer edge surface 102.
  • the chamfering angle between the cutting edge 103, the chip evacuation groove 104 and the outer edge surface 102 is 0.40 mm.
  • FIGS. 11 and 12 it is a high-efficiency chip evacuation pre-formed polycrystalline diamond compact having twelve-toothed teeth of similar structure.
  • the cutting edge 103 of the twelve-toothed composite sheet has a radial extension length of 1.72 mm and a height of 1.23 mm, which is 90 degrees from the outer edge surface 102; and the chip evacuation groove 104 and the cutting edge
  • the teeth 103 are connected in a ring shape at 26° and have an angle of 116° with the outer edge surface 102. Tooth cutting edge 103 chip evacuation recess 104 between the surface 102 and the chamfered outer edge of 0.40 mm. Referring to FIG.
  • the cutting edge 103 of the twelve-blade composite sheet has a radial extension length of 1.70 mm and a height of 1.23 mm, and the angle with the outer edge surface 102 is 99.7°; and the chip evacuation groove 104 and the cutting edge
  • the teeth 103 are connected in a ring shape at 38.3° and have an angle of 128.3° with the outer edge surface 102.
  • the cutting edge 103, the chip evacuation groove 104 and the outer edge surface 102 have a chamfer of 0.40 mm
  • Embodiment 3 The high-efficiency chip evacuation pre-formed polycrystalline diamond compact sheets provided in the fourth embodiment and the fifth embodiment are suitable for drilling complex structures such as extremely hard rock layers and tough interlayers, especially tough interlayers and deep complex formations.
  • the multi-blade structure can solve the problems that the formation is difficult to drill, the speed is slow, and the mud bag is prone to occur.
  • the invention has industrial applicability.

Abstract

一种钻探用高效排屑预成形聚晶金刚石复合片，包括聚晶金刚石层（100）及与聚晶金刚石层（100）相粘结的硬质合金基支撑体（200）；所述的聚晶金刚石层（100）包括上表面（101）和外缘表面（102），所述的上表面（101）与外缘表面（102）的交界区域形成中心放射状的切削刃齿（103）和排屑凹槽（104）；所述切削刃齿（103）与排屑凹槽（104）以一定角度方向相连且均沿径向延伸呈环形分布。该结构具有较强的锋利度及高效的排屑优势，其可大幅度提高钻进效率且防止发生泥包现象，确保钻井平台操控的平稳性。

Description

一种钻探用高效排屑预成形聚晶金刚石复合片 技术领域
[0001] 本发明属于超硬复合材料技术领域， 尤其涉及一种钻探用高效排屑预成形聚晶 金刚石复合片， 主要用于石油钻井、 工程掘进和探矿等领域。
背景技术
[0002] 金刚石以其超高的硬度、 耐磨性被视为理想的钻进材料和切削加工材料， 而聚 晶金刚石复合片 （PDC) 的问世则成为金刚石应用技术发展史上一个重要的里程 碑。 目前， PCD复合片作为超耐磨切削元件已在旋转钻头、 金刚石钻头等工具中 使用， 其广泛应用于石油、 天然气钻探等领域。 随着勘探理念转变、 创新， 非 常规油气 （比如页岩油、 气等） 勘探取得迅猛发展， 较深复杂地层使用的钻头 设计及其聚晶金刚石复合片的性能需要不断提升， 尤其是钻进坚硬岩层、 坚韧 夹层等地层， 往往会因难进尺、 排屑不通畅等， 出现崩齿， 甚至卡钻等严重钻 井事故。
[0003] 鉴于上述的极难钻探地层且钻头易出现崩齿问题， 专利 CN200820070865.5提供 一种解决因裂纹在表面扩展致使崩齿问题， 而在高效排屑方面尚不能胜任。 本 发明提出一种钻探用高效排屑预成形聚晶金刚石复合片， 利用其锋利切削刃齿 及畅达的排屑结构予以综合解决难钻进、 崩齿、 泥包等难题。
技术问题
[0004] 本发明的目的在于通过改变 PCD复合片的聚晶金刚石层的上表面及外缘表面结 构， 提供一种极锋利的钻探用高效排屑预成形聚晶金刚石复合片， 此 PCD复合片 在用于难钻探地层中可克服难钻进、 减少崩齿问题， 避免发生泥包等钻井事故 ， 提高钻头寿命及钻井平台的操控平稳性。
问题的解决方案
技术解决方案
[0005] 一种钻探用高效排屑预成形聚晶金刚石复合片， 其包括聚晶金刚石层及与聚晶 金刚石层相粘结的硬质合金支撑体。 其中， 所述聚晶金刚石层包括上表面及外 缘表面， 所述上表面与外缘表面在至少部分交界区域形成切削刃齿和排屑凹槽
[[00000066]] 进进一- 步少， 所述的切削刃齿与聚晶金刚石层外缘表面成一定角度且大于或等于 90 ο
[0007] 进- 少 ， 所述的切削刃齿高不低于 0.3mm、 径向长度不小于 0.5 mm
[0008] 进- 少 ， 所述的切削刃齿和排屑凹槽沿径向延伸呈环形分布。
[0009] 进- 少， 所述排屑凹槽与聚晶金刚石层外缘表面成一定角度且大于或等于 90°
[0010] 进- 少 ， 所述的切削刃齿、 排屑凹槽与外缘表面之间设有倒角或无倒角。
[0011] 进- 少， 所述的切削刃齿与排屑凹槽之间的纵向夹角小于 60°
[0012] 进- 少， 所述聚晶金刚石层上表面中心部位存在容屑凹槽。
[0013] 进- 少， 所述容屑凹槽呈圆形、 方形等。
[0014] 进- 少， 所述容屑凹槽深度小于聚晶金刚石厚度 1/10
发明的有益效果
有益效果
[0015] 本发明在钻采钻进过程中， 利用此高效排屑预成形聚晶金刚石复合片作为耐磨 切削元件， 其结构存在锋利的切削刃齿和畅达的排屑凹槽或容屑结构， 可降低 P CD复合片工作区域磨削热， 减少崩齿， 避免排屑不畅发生泥包等钻井事故， 可 大幅度提高钻井钻进效率和钻井平台的操控平稳性。
对附图的简要说明
附图说明
[0016] 图 1是本发明中一种无容屑结构的高效排屑预成形聚晶金刚石复合片的结构示 图 2是本发明中一种带容屑结构的高效排屑预成形聚晶金刚石复合片的结构示
[0018] 图 3是一种四刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图；
[0019] 图 4是另一种四刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图;
[0020] 图 5是一种五刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图； [0021] 图 6是另一种五刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图；
[0022] 图 7是一种八刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图；
[0023] 图 8是另一种八刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图；
[0024] 图 9是一种十刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图；
[0025] 图 10是另一种十刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图；
[0026] 图 11是一种十二刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图；
[0027] 图 12是另一种十二刃齿的高效排屑预成形聚晶金刚石复合片的结构示意图。
实施该发明的最佳实施例
本发明的最佳实施方式
[0028] 为了更清楚地理解本发明， 下面将结合实施例进一步阐明本发明的内容， 但本 发明的内容不仅局限于下面的实施例。 基于本发明中实施例， 本领域普通技术 人员在没有做出创造性劳动前体下所获得其它所有实施例， 均将属于本发明保 护的范畴。
[0029] 如图 1和 2所示， 本发明包括聚晶金刚石层 100及与其相粘结的硬质合金支撑体 2 00。 所述聚晶金刚石层 100包括上表面 101及外缘表面 102， 所述上表面 101与外 缘表面 102在至少部分交界区域形成切削刃齿 103和排屑凹槽 104。 此外， 如参考 图 2所示， 所述聚晶金刚石层上表面中心部位存在有容屑凹槽 105。
[0030] 如图 3和图 4所示， 其是具有相似结构的四刃齿的高效排屑预成形聚晶金刚石复 合片。 参考图 3所示， 此四刃齿复合片的切削刃齿 103径向延伸长度 1.87mm、 高 度 1.23mm， 其与外缘表面 102的角度为 90° ; 而排屑凹槽 104与切削刃齿 103以 22° 相连呈环形分布， 其与外缘表面 102的角度为 112°。 切削刃齿 103、 排屑凹槽 104 与外缘表面 102之间倒角为 0.35
mm。 参考图 4所示， 此四刃齿复合片的切削刃齿 103径向延伸长度 1.83mm、 高度 1.23mm, 其与外缘表面 102的角度为 99.5° ; 而排屑凹槽 104与切削刃齿 103以 33.2 。相连呈环形分布， 其与外缘表面 102的角度为 123.2°。 切削刃齿 103、 排屑凹槽 1 04与外缘表面 102之间倒角为 0.35 mm。
本发明的实施方式 [0031] 实施例一
[0032] 如图 3和图 4所示， 其是具有相似结构的四刃齿的高效排屑预成形聚晶金刚石复 合片。 参考图 3所示， 此四刃齿复合片的切削刃齿 103径向延伸长度 1.87mm、 高 度 1.23mm， 其与外缘表面 102的角度为 90° ; 而排屑凹槽 104与切削刃齿 103以 22° 相连呈环形分布， 其与外缘表面 102的角度为 112°。 切削刃齿 103、 排屑凹槽 104 与外缘表面 102之间倒角为 0.35
mm。 参考图 4所示， 此四刃齿复合片的切削刃齿 103径向延伸长度 1.83mm、 高度 1.23mm, 其与外缘表面 102的角度为 99.5° ; 而排屑凹槽 104与切削刃齿 103以 33.2 。相连呈环形分布， 其与外缘表面 102的角度为 123.2°。 切削刃齿 103、 排屑凹槽 1 04与外缘表面 102之间倒角为 0.35 mm。
[0033] 实施例二
[0034] 如图 5和图 6所示， 其是具有相似结构的五刃齿的高效排屑预成形聚晶金刚石复 合片。 参考图 5所示， 此五刃齿复合片的切削刃齿 103径向延伸长度 1.91mm、 高 度 1.23mm， 其与外缘表面 102的角度为 90° ; 而排屑凹槽 104与切削刃齿 103以 20° 相连呈环形分布， 其与外缘表面 102的角度为 110°。 切削刃齿 103、 排屑凹槽 104 与外缘表面 102之间倒角为 0.35
mm。 参考图 6所示， 此五刃齿复合片的切削刃齿 103径向延伸长度 1.87mm、 高度
1.23mm, 其与外缘表面 102的角度为 100.1° ; 而排屑凹槽 104与切削刃齿 103以 35.
6°相连呈环形分布， 其与外缘表面 102的角度为 125.6°。 切削刃齿 103、 排屑凹槽
104与外缘表面 102之间倒角为 0.35 mm。
[0035] 实施例一和实施例二所提供的高效排屑预成形聚晶金刚石复合片适用于极硬岩 层、 坚韧夹层等复杂地层的钻探， 尤其极硬岩层。 此多刃齿结构也大大提高复 合片的利用率及降低钻探成本等。
[0036] 实施例三
[0037] 如图 7和图 8所示， 其是具有相似结构的八刃齿的高效排屑预成形聚晶金刚石复 合片。 参考图 7所示， 此八刃齿复合片的切削刃齿 103径向延伸长度 1.78mm、 高 度 1.23mm， 其与外缘表面 102的角度为 90° ; 而排屑凹槽 104与切削刃齿 103以 23° 相连呈环形分布， 其与外缘表面 102的角度为 113°。 切削刃齿 103、 排屑凹槽 104 与外缘表面 102之间倒角为 0.40
mm。 参考图 8所示， 此八刃齿复合片的切削刃齿 103径向延伸长度 1.76mm、 高度 1.23mm, 其与外缘表面 102的角度为 99.3° ; 而排屑凹槽 104与切削刃齿 103以 32.8 。相连呈环形分布， 其与外缘表面 102的角度为 122.8°。 切削刃齿 103、 排屑凹槽 1 04与外缘表面 102之间倒角为 0.40 mm。
[0038] 实施例四
[0039] 参考附图 9、 10所示， 其是具有相似结构的十刃齿的高效排屑预成形聚晶金刚 石复合片。 参考图 9所示， 此十刃齿复合片的切削刃齿 103径向延伸长度 1.69mm 、 高度 1.23mm， 其与外缘表面 102的角度为 90° ; 而排屑凹槽 104与切削刃齿 103 以 25°相连呈环形分布， 其与外缘表面 102的角度为 115°。 切削刃齿 103、 排屑凹 槽104与外缘表面 102之间倒角为 0.40 mm。 参考图 10所示， 此十刃齿复合片的切 削刃齿 103径向延伸长度 1.68mm、 高度 1.23mm， 其与外缘表面 102的角度为 99.1° ； 而排屑凹槽 104与切削刃齿 103以 36.5°相连呈环形分布， 其与外缘表面 102的角 度为 126.5°。 切削刃齿 103、 排屑凹槽 104与外缘表面 102之间倒角为 0.40 mm。
[0040] 实施例五
[0041] 如图 11和图 12所示， 其是具有相似结构的十二刃齿的高效排屑预成形聚晶金刚 石复合片。 参考图 11所示， 此十二刃齿复合片的切削刃齿 103径向延伸长度 1.72 mm、 高度 1.23mm， 其与外缘表面 102的角度为 90° ; 而排屑凹槽 104与切削刃齿 1 03以 26°相连呈环形分布， 其与外缘表面 102的角度为 116°。 切削刃齿 103、 排屑 凹槽 104与外缘表面 102之间倒角为 0.40 mm。 参考图 12所示， 此十二刃齿复合片 的切削刃齿 103径向延伸长度 1.70mm、 高度 1.23mm， 其与外缘表面 102的角度为 99.7° ; 而排屑凹槽 104与切削刃齿 103以 38.3°相连呈环形分布， 其与外缘表面 102 的角度为 128.3°。 切削刃齿 103、 排屑凹槽 104与外缘表面 102之间倒角为 0.40 mm
[0042] 实施例三、 实施例四及实施例五所提供的高效排屑预成形聚晶金刚石复合片适 用于极硬岩层、 坚韧夹层等复杂地层的钻探， 尤其坚韧夹层及较深的复杂地层 。 此多刃齿结构可解决地层难钻进、 机速慢及易发生泥包等问题。 以上所述仅 为本发明的优选实施例， 应当指出， 对于本技术领域的普通技术人员来说， 在 不脱离本发明的技术方案前提下， 还可做出若干修改或等同替代， 这均视为本 发明的保护范畴。
工业实用性
本发明具有工业实用性。

Claims

权利要求书
一种钻探用高效排屑预成形聚晶金刚石复合片， 包括聚晶金刚石层及 与聚晶金刚石层相粘结的硬质合金基体， 其特征在于： 所述的聚晶金 刚石层包括上表面和外缘表面， 所述的上表面与外缘表面的交界区域 形成中心放射状的切削刃齿和排屑凹槽。
根据权利要求 1所述一种钻探用高效排屑预成形聚晶金刚石复合片， 其特征在于： 所述切削刃齿与聚晶金刚石层外缘表面成一定角度且大 于或等于 90°。
根据权利要求 1所述一种钻探用高效排屑预成形聚晶金刚石复合片， 其特征在于： 所述的切削刃齿和排屑凹槽沿径向延伸呈环形分布。 根据权利要求 1所述一种钻探用高效排屑预成形聚晶金刚石复合片， 其特征在于： 所述的切削刃齿高不低于 0.3mm， 径向长度不小于 0.5 mm。
根据权利要求 1所述一种钻探用高效排屑预成形聚晶金刚石复合片， 其特征在于： 所述排屑凹槽与聚晶金刚石层外缘表面成一定角度且大 于或等于 90°。
根据权利要求 1所述一种钻探用高效排屑预成形聚晶金刚石复合片， 其特征在于： 所述的切削刃齿、 排屑凹槽与外缘表面之间设有倒角或 无倒角。
根据权利要求 1所述一种钻探用高效排屑预成形聚晶金刚石复合片， 其特种在于： 所述切削刃齿与排屑凹槽之间的纵向夹角小于 60°。 根据权利要求 1所述一种钻探用高效排屑预成形聚晶金刚石复合片， 其特征在于： 所述聚晶金刚石层上表面中心部位存在容屑凹槽。 根据权利要求 8所述一种钻探用高效排屑预成形聚晶金刚石复合片， 其特征在于： 所述的容屑凹槽呈圆形、 方形等。
根据权利要求 8所述一种钻探用高效排屑预成形聚晶金刚石复合片， 其特征在于： 所述的容屑凹槽深度大于聚晶金刚石厚度 1/10。
PCT/CN2017/105474 2017-03-14 2017-10-10 一种钻探用高效排屑预成形聚晶金刚石复合片 WO2018166191A1 (zh)

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