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    • 3. 发明授权
    • Rotary drill bits
    • 旋转钻头
    • US4733735A
    • 1988-03-29
    • US913101
    • 1986-09-29
    • John D. BarrJohn M. FullerMalcolm R. Taylor
    • John D. BarrJohn M. FullerMalcolm R. Taylor
    • E21B10/26E21B10/56E21B10/567E21B10/60
    • E21B10/567E21B10/26E21B10/602
    • A rotary drill bit comprises a bit body having a leading face and a gauge region, a number of blades on the leading face of the bit body, and a number of cutting elements mounted along each blade. A passage in the bit body supplies drilling fluid to nozzles in the leading face of the bit body for cooling and cleaning the cutting elements. Each nozzle is so oriented, and the surface of the bit body in the region in front of each blade is so shaped, as to promote a vortex flow of drilling fluid around said region, with part of the periphery of the vortex extending across the cutting elements on the blade, so that fluid in the periphery of the vortex passes across the cutting elements mounted on each blade before escaping through an exit channel in the gauge region.
    • 旋转钻头包括具有前表面和测量区域的钻头体,钻头体的前表面上的多个刀片以及沿着每个刀片安装的多个切割元件。 钻头体中的通道为钻头体的前表面的喷嘴提供钻井液,用于冷却和清洁切割元件。 每个喷嘴如此取向,并且钻头体在每个叶片前面的区域中的表面是如此成形的,以便促进围绕所述区域的钻井流体的涡流,涡旋的周边的一部分延伸穿过切割 使得涡流周边中的流体穿过安装在每个叶片上的切割元件,然后通过测量区域中的出口通道逸出。
    • 6. 发明授权
    • Drill bit
    • 钻头
    • US4505342A
    • 1985-03-19
    • US443657
    • 1982-11-22
    • John D. BarrJohn M. Fuller
    • John D. BarrJohn M. Fuller
    • E21B10/56E21B10/567E21B10/60E21B10/46
    • E21B10/567E21B10/602
    • A full bore drag type well drilling bit including a bit body comprised of a generally non-frangible metallic material. The bit body has an operating end face defined by said metallic material to include a plurality of upsets each having a leading edge and at least one recess extending through such leading edge into said metallic material. The end face further includes a plurality of flow paths, each of the leading edges of the upset having one such flow path extending therealong and inset therefrom. At least some of the upsets have a plurality of such recesses spaced therealong. A plurality of circulation ports open through the end face of the bit body, the number of circulation ports being less than the number of flow paths extending along the leading edges of the upsets, and at least some of the ports communicate with more than one such path. The bit further comprises a plurality of cutting structures carried by the bit body. Each cutting structure includes an elongate mounting body and a cutting formation on the exterior of the mounting body adjacent one end thereof. At least a majority of the mounting bodies of the bit are mounted in respective ones of the recesses in the upsets with their cutting formations facing outwardly along the leading edges of the upsets.
    • 一种全孔拖曳式钻井钻头,包括由一般非易碎金属材料构成的钻头体。 钻头体具有由所述金属材料限定的操作端面,以包括多个具有前缘的凹陷和至少一个延伸穿过该前缘的凹陷进入所述金属材料的凹陷。 端面还包括多个流动路径,镦粗的每个前缘具有一个沿其延伸并插入的一个这样的流动路径。 至少一些凹陷具有多个间隔开的这种凹槽。 多个循环端口通过钻头体的端面开口,循环端口的数量小于沿着凹陷的前缘延伸的流动路径的数量,并且至少一些端口与多于一个的这种 路径。 钻头还包括由钻头体承载的多个切割结构。 每个切割结构包括细长安装体和邻近其一端的安装体外部的切割结构。 钻头的至少大部分安装体安装在凹陷中的相应的凹部中,其切割结构沿着凹陷的前缘面向外。
    • 8. 发明授权
    • Rotary drill bits
    • 旋转钻头
    • US5649604A
    • 1997-07-22
    • US538759
    • 1995-10-03
    • John M. FullerAndrew Murdock
    • John M. FullerAndrew Murdock
    • E21B10/42E21B10/43E21B10/56E21B10/567E21B10/46
    • E21B10/43E21B10/5673
    • A rotary drill bit comprises a bit body having a shank for connection to a drill string, a plurality of cutters mounted on the bit body, each cutter having a cutting face, and means for supplying drilling fluid to the surface of the bit body to cool and clean the cutters. At least some of the cutters are lateral cutters located to act sideways on the formation being drilled, and the cutting faces of such lateral cutters are orientated to exhibit negative side rake and negative top rake with respect to the surface of the formation. The negative side rake angle is greater than 20.degree. and may be as much as 90.degree., and the negative top rake angle is also more than 20.degree.. A single cutter may include two cutting faces at different negative side rake angles, e.g. the cutter may comprise a generally cylindrical substrate formed at one end with two oppositely inclined surfaces meeting along a ridge, a facing table of polycrystalline diamond being bonded to the substrate surfaces and extending over the ridge.
    • 旋转钻头包括具有用于连接到钻柱的柄的钻头体,安装在钻头体上的多个切割器,每个切割器具有切割面,以及用于将钻井流体供应到钻头体的表面以冷却的装置 并清洁刀具。 至少一些切割器是位于在被钻孔的地层上侧向作用的横向切割器,并且这种横向切割器的切割面被定向成相对于地层的表面呈现负侧倾斜和负顶部倾斜。 负侧前角大于20°,可高达90°,负顶角前倾角也大于20°。 单个切割器可以包括处于不同负侧前角的两个切割面,例如。 切割器可以包括在一端形成的大致圆柱形的基底,两个相对倾斜的表面沿着隆起相交,多晶金刚石的面对台被结合到基底表面并在脊上延伸。
    • 10. 发明授权
    • Drill bit and cutter therefor
    • 钻头和刀具
    • US4640375A
    • 1987-02-03
    • US578182
    • 1984-02-08
    • John D. BarrJohn M. Fuller
    • John D. BarrJohn M. Fuller
    • E21B10/56E21B10/567E21B10/60E21B10/46
    • E21B10/567E21B10/602
    • The invention comprises a drag-type drill bit including a bit body adapted for rotative movement in a pre-determined direction in use and having an operating end face, and a plurality of cutting members mounted in the bit body. Each of the cutting members has a stud portion disposed in a respective recess in the bit body and defining the inner end of the cutting member, and a cutting face generally adjacent its outer end facing outwardly through the operating end face of the bit body and terminating in an outermost cutting edge. The centerline of the stud portion is rearwardly inclined, from the outer end to the inner end, with respect to the direction of movement in use, taken at the midpoint of the cutting edge, at a first angle from 80.degree. to 30.degree. inclusive. The cutting face is oriented such that the tangent to the cutting face at the midpoint of the cutting edge and in the central plane of the cutting member is disposed at a second angle, from 18.degree. to 75.degree. inclusive, with respect to the centerline of the stud portion.
    • 本发明包括一种拖曳式钻头,其包括适于在使用中以预定方向进行旋转运动并具有操作端面的钻头体,以及安装在钻头体中的多个切割构件。 每个切割构件具有设置在钻头体中的相应凹部中并且限定切割构件的内端的螺柱部分,以及切削面,大体上靠近其外端通过钻头体的操作端面向外的端部,并且终止 在最外切割边缘。 螺柱部分的中心线相对于使用中的移动方向从外端向内端向后倾斜,在切削刃的中点处以80°至30°的第一角度包括在内。 切割面被定向成使得在切割边缘的中点处和切割部件的中心平面中的切割面的切线相对于切割部件的中心线以18度至75度的第二角度布置 螺柱部分。