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公开(公告)号：US6116355A
公开(公告)日：2000-09-12
申请号：US898055
申请日：1997-07-22
CPC分类号： E21B7/06 , E21B10/602
摘要： A choke device for controlling fluid flow, particularly in a modulated bias unit, drill bit or other item downhole drilling component, comprises a passage for the flow of fluid, a choke aperture separating an upstream portion of the passage from a downstream portion thereof, and an impingement surface located in the downstream portion of the passage opposite and spaced from the choke aperture, so that fluid flowing through the choke aperture impinges on the impingement surface. The impingement surface is formed from superhard material, such as polycrystalline diamond, and may comprise the front facing table of a two-layer polycrystalline diamond compact of the kind used as cutting elements in drag-type drill bits.
摘要翻译： 用于控制流体流动的扼流装置，特别是在调制偏压单元，钻头或其它物品井下钻井部件中的流体流动包括用于流体流动的通道，将通道的上游部分与其下游部分分开的扼流孔，以及 位于通道的与阻塞孔相对且间隔开的下游部分的冲击表面，使得流过扼流圈的流体撞击冲击表面。 冲击表面由诸如多晶金刚石的超硬材料形成，并且可以包括用作拖式钻头中的切割元件的类型的双层多晶金刚石压块的前表面。
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公开(公告)号：US5967246A
公开(公告)日：1999-10-19
申请号：US208170
申请日：1998-12-09
申请人： Douglas Caraway , John Hayward , Malcolm R. Taylor , Tom Scott Roberts , Steven Taylor , Graham Watson
发明人： Douglas Caraway , John Hayward , Malcolm R. Taylor , Tom Scott Roberts , Steven Taylor , Graham Watson
CPC分类号： E21B10/55 , E21B10/003 , E21B10/26 , E21B10/60 , E21B10/602 , E21B17/1092
摘要： A rotary drill bit for use in drilling holes in subsurface formations comprises a bit body having a leading face and a gauge region, a number of blades formed on the leading face of the bit and extending outwardly away from the axis of the bit so as to define between the blades a number of fluid channels leading towards the gauge region, a number of cutting elements mounted side-by-side along each blade, and a number of nozzles in the bit body for supplying drilling fluid to the fluid channels for cleaning and cooling the cutting elements. In each of the fluid channels, adjacent the gauge region, is an opening into an enclosed passage which passes internally through the bit body to an outlet which, in use, communicates with the annulus between the drill string and the wall of the borehole being drilled. The gauge region of the drill bit comprises a substantially continuous bearing surface which extends around the whole of the gauge region.
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公开(公告)号：US5699868A
公开(公告)日：1997-12-23
申请号：US637985
申请日：1996-04-24
申请人： Douglas Caraway , Graham Watson , T. Alex Newton
发明人： Douglas Caraway , Graham Watson , T. Alex Newton
CPC分类号： E21B10/55 , E21B10/602
摘要： A rotary drill bit for drilling holes in subsurface formations comprises a bit body having a leading face and a gauge region, and a plurality of blades formed on the leading face of the bit body and extending outwardly away from the axis of the bit towards the gauge region so as to define a fluid flow channel between the leading edge of each blade and the trailing edge of the adjacent preceding blade. A plurality of cutting elements are mounted along the leading edge of each blade, and there is provided, in one or more of the channels, a main nozzle which directs fluid along the leading edge of one blade so as to clean and cool the cutting elements on it, and a subsidiary nozzle which is located and orientated so as to direct fluid along the trailing edge of the preceding blade in a direction opposite to the direction of flow from the main nozzle, so as to tend to enhance partial recirculation of fluid flow in the flow channel between the blades.
摘要翻译： 用于在地下构造中钻孔的旋转钻头包括具有前表面和表面区域的钻头体，以及形成在钻头体的前表面上并且向外远离钻头的轴线朝向量规的多个刀片 区域，以便限定每个叶片的前缘和相邻的前刀片的后缘之间的流体流动通道。 多个切割元件沿着每个叶片的前缘安装，并且在一个或多个通道中设置有主喷嘴，其沿着一个叶片的前缘引导流体，以便清洁和冷却切割元件 以及辅助喷嘴，其位于和定向以沿着与主喷嘴的流动方向相反的方向沿着先前叶片的后缘引导流体，以便趋向于增强流体流的部分再循环 在叶片之间的流动通道中。
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公开(公告)号：US08721752B2
公开(公告)日：2014-05-13
申请号：US12672927
申请日：2008-08-14
CPC分类号： E21B10/567 , B22F2005/001 , C22C26/00 , Y10T428/24488 , Y10T428/2457 , Y10T428/24612 , Y10T428/2495
摘要： A PCD cutting element for use in earth boring drill bits where die interstices remote from the working surface are filled with a catalyzing material and the interstices adjacent to the working surface are substantially free of the catalyzing material is described. An intermediate region between the substantially free portion and filled portion has a plurality of generally conically sectioned catalyst-free projections which taper down, extending to a second depth from the planar working surface, preferably about 0.5 times or more of the first depth.
摘要翻译： 描述了用于钻孔钻头的PCD切割元件，其中远离工作表面的模具间隙填充有催化材料，并且与工作表面相邻的间隙基本上不含催化材料。 基本上自由部分和填充部分之间的中间区域具有多个大致圆锥形截面的无催化剂的突起，其向下渐缩，从平面工作表面延伸到第二深度，优选地为第一深度的约0.5倍或更多。
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公开(公告)号：US06193000B1
公开(公告)日：2001-02-27
申请号：US09444072
申请日：1999-11-22
申请人： Douglas Caraway , Robin Macmillan
发明人： Douglas Caraway , Robin Macmillan
IPC分类号： E21B1046
摘要： There is provided a rotary drag-type drill bit comprising a bit body having a leading surface comprising a plurality of pads, at least some of the pads each having a wearable abrasive surface including particles of superhard material and defining an outer profile of the pad, at least a part of the outer profile of at least one of the pads being disposed inwardly or outwardly of the outer profile of the other pads. With this arrangement, during initial drilling through softer formation, most of the removal of formation will be effected by the outermost of the abrasive pads and little or no formation will be removed by the more inward pads. Accordingly, the bit will act as a lighter set bit and good rates of penetration may be achieved. As drilling proceeds and the bit wears, which may occur more rapidly as the bit meets harder formations, the more outwardly disposed pads will wear down more than the inwardly disposed pads so that the inwardly disposed pads will begin to contribute more to the cutting action of the bit, so that the bit effectively becomes heavier set. As drilling progresses to a point where all of the pads wear down to the same level, the bit will then act as a conventional heavy set bit where all the abrasive surfaces lie on the same profile.
摘要翻译： 提供了一种旋转牵引式钻头，其包括具有包括多个焊盘的前表面的钻头体，至少一些焊盘每个具有包括超硬材料颗粒并且限定焊盘的外部轮廓的可穿戴研磨表面， 至少一个焊盘的外轮廓的至少一部分设置在其它焊盘的外轮廓的内侧或外侧。 通过这种布置，在通过较软地层的初始钻孔期间，大部分地层的移除将由研磨垫的最外面进行，很少或不会通过更靠内的垫移除地层。 因此，该位将用作较轻的位，并且可以实现良好的穿透速率。 随着钻头的进行和钻头磨损，随着钻头遇到更硬的结构，钻头可能会更快地发生，所以更多的外部设置的焊盘将比内部设置的焊盘更多地磨损，使得向内设置的焊盘将开始对切割动作 该位，使得该位有效地变得更重。 随着钻孔进行到所有垫磨损到相同水平的位置，钻头将用作传统的重型钻头，其中所有磨料表面位于同一轮廓上。
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公开(公告)号：US5944128A
公开(公告)日：1999-08-31
申请号：US19877
申请日：1998-02-06
申请人： David Truax , Douglas Caraway , Stephen M. Evans , Andrew Murdock
发明人： David Truax , Douglas Caraway , Stephen M. Evans , Andrew Murdock
IPC分类号： B22D19/06 , B22D19/14 , B22D19/16 , B22F3/12 , B22F7/06 , B22F7/08 , E21B10/46 , E21B10/54 , E21B10/08
CPC分类号： B22F7/08 , B22D19/06 , B22D19/14 , B22D19/16 , B22F3/1275 , B22F7/06 , C22C1/1015 , E21B10/46 , E21B10/54 , B22F2005/001 , B22F2998/00
摘要： A drill bit comprises a main body part having a shank for connection to a drill string, an end face, an internal passage for supplying drilling fluid to the end face, a number of blades extending from the end face outwardly and longitudinally of the central axis of rotation of the bit, and a number of cutters mounted on each said blade. Each blade comprises a central metal core at least partly surrounded by solid infiltrated matrix material. A method of manufacturing such a drill bit includes the steps of forming a main body part from metal, applying to the outer surface of the main body part a coating layer of wax which liquefies at elevated temperature, applying to the coated body part mold-forming material to provide a self-supporting mold surrounding the coated body part, and raising the temperature of the body and surrounding mold sufficiently to liquefy the coating material. The liquefied coating is then drained from the mold, and the cavities left by the coating material are packed with powdered matrix material, which is then infiltrated with a binder alloy at elevated temperature to form a solid infiltrated matrix layer, on the bit body part, corresponding to the layer of wax previously applied.
摘要翻译： 钻头包括具有用于连接到钻柱的柄的主体部分，端面，用于向端面提供钻井流体的内部通道，从端面向外和中心轴线的纵向延伸的多个叶片 钻头的旋转以及安装在每个所述刀片上的多个切割器。 每个叶片包括至少部分地被固体渗透的基质材料包围的中心金属芯。 一种制造这种钻头的方法包括以下步骤：从金属形成主体部分，向主体部分的外表面涂覆在高温下液化的蜡涂层，施加到涂覆体部分模具成型 提供围绕涂覆体部分的自支撑模具的材料，并且充分提高主体和周围模具的温度以液化涂料。 然后将液化的涂层从模具中排出，并且由涂料留下的空腔填充有粉末状基体材料，然后在高温下用粘合剂合金渗透以在钻头体部分上形成固体渗透的基质层， 对应于以前应用的蜡层。
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公开(公告)号：US08733475B2
公开(公告)日：2014-05-27
申请号：US13016332
申请日：2011-01-28
申请人： Thang Vo , Tom Scott Roberts , Craig Ivie , Douglas Caraway
发明人： Thang Vo , Tom Scott Roberts , Craig Ivie , Douglas Caraway
IPC分类号： E21B10/08
摘要： Disclosed is a rolling cone drill bit with inner row cutting teeth having portions shielded with an erosion-resistant material that differs in material properties from the tooth's core portion that is more impact resistant. The tooth includes shielding on at least a portion of the upstream end and along portions of the flanking surfaces. It includes shield-free portions on the flanks between the root and the tooth crest. Most of the tooth's perimeter is made of the core material and is free of shielding. Gage row teeth may be angled and form a channel to direct drilling fluid from the gage region of the borehole to locations where the inner row teeth are generating most cuttings. Nozzles are provided with non-uniform orientations.
摘要翻译： 公开了一种具有内排切割齿的滚动圆锥钻头，其具有用抗侵蚀材料屏蔽的部分，其材料特性与具有更耐冲击性的齿的芯部分不同。 所述牙齿包括在所述上游端的至少一部分和所述侧面的部分上的屏蔽。 它包括在根部和齿顶之间的侧面上的无屏蔽部分。 牙齿的大部分周边由芯材制成，不受屏蔽。 计量排齿可以成角度并且形成通道，以将钻井液从钻孔的测量区域引导到内排齿产生大多数切屑的位置。 喷嘴具有不均匀的方向。
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公开(公告)号：US06371226B1
公开(公告)日：2002-04-16
申请号：US09447059
申请日：1999-11-22
申请人： Douglas Caraway
发明人： Douglas Caraway
IPC分类号： F21B1036
摘要： There is provided a rotary drag-type drill bit comprising a bit body having a leading surface comprising a plurality of pads, at least some of the pads each having a wearable abrasive surface including particles of superhard material and defining an outer profile of the pad, at least a part of the outer profile of at least one of the pads being disposed inwardly or outwardly of the outer profile of the other pads. With this arrangement, during initial drilling through softer formation, most of the removal of formation will be effected by the outermost of the abrasive pads and little or no formation will be removed by the more inward pads. Accordingly, the bit will act as a lighter set bit and good rates of penetration may be achieved. As drilling proceeds and the bit wears, which may occur more rapidly as the bit meets harder formations, the more outwardly disposed pads will wear down more than the inwardly disposed pads so that the inwardly disposed pads will begin to contribute more to the cutting action of the bit, so that the bit effectively becomes heavier set. As drilling progresses to a point where all of the pads wear down to the same level, the bit will then act as a conventional heavy set bit where all the abrasive surfaces lie on the same profile.
摘要翻译： 提供了一种旋转牵引式钻头，其包括具有包括多个焊盘的前表面的钻头体，至少一些焊盘每个具有包括超硬材料颗粒并且限定焊盘的外部轮廓的可穿戴研磨表面， 至少一个焊盘的外轮廓的至少一部分设置在其它焊盘的外轮廓的内侧或外侧。 通过这种布置，在通过较软地层的初始钻孔期间，大部分地层的移除将由研磨垫的最外面进行，很少或不会通过更靠内的垫移除地层。 因此，该位将用作较轻的位，并且可以实现良好的穿透速率。 随着钻头的进行和钻头磨损，随着钻头遇到更硬的结构，钻头可能会更快地发生，所以更多的外部设置的焊盘将比内部设置的焊盘更多地磨损，使得向内设置的焊盘将开始对切割动作 该位，使得该位有效地变得更重。 随着钻孔进行到所有垫磨损到相同水平的位置，钻头将用作传统的重型钻头，其中所有磨料表面位于同一轮廓上。
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公开(公告)号：US5992547A
公开(公告)日：1999-11-30
申请号：US208197
申请日：1998-12-09
申请人： Douglas Caraway , John Hayward , Malcolm R. Taylor , Tom Scott Roberts , Steven Taylor , Graham R Watson
发明人： Douglas Caraway , John Hayward , Malcolm R. Taylor , Tom Scott Roberts , Steven Taylor , Graham R Watson
CPC分类号： E21B10/55 , E21B10/003 , E21B10/26 , E21B10/60 , E21B10/602 , E21B17/1092
摘要： A rotary drill bit for use in drilling holes in subsurface formations comprises a bit body having a leading face and a gauge region, a number of blades formed on the leading face of the bit and extending outwardly away from the axis of the bit so as to define between the blades a number of fluid channels leading towards the gauge region, a number of cutting elements mounted side-by-side along each blade, and a number of nozzles in the bit body for supplying drilling fluid to the fluid channels for cleaning and cooling the cutting elements. In each of the fluid channels, adjacent the gauge region, is an opening into an enclosed passage which passes internally through the bit body to an outlet which, in use, communicates with the annulus between the drill string and the wall of the borehole being drilled. The gauge region of the drill bit comprises a substantially continuous bearing surface which extends around the whole of the gauge region.
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公开(公告)号：US5904213A
公开(公告)日：1999-05-18
申请号：US835812
申请日：1997-04-16
申请人： Douglas Caraway , John Hayward , Malcolm R. Taylor , Tom Scott Roberts , Steven Taylor , Graham R Watson
发明人： Douglas Caraway , John Hayward , Malcolm R. Taylor , Tom Scott Roberts , Steven Taylor , Graham R Watson
CPC分类号： E21B10/55 , E21B10/003 , E21B10/26 , E21B10/60 , E21B10/602 , E21B17/1092
摘要： A rotary drill bit for use in drilling holes in subsurface formations comprises a bit body having a leading face and a gauge region, a number of blades formed on the leading face of the bit and extending outwardly away from the axis of the bit so as to define between the blades a number of fluid channels leading towards the gauge region, a number of cutting elements mounted side-by-side along each blade, and a number of nozzles in the bit body for supplying drilling fluid to the fluid channels for cleaning and cooling the cutting elements. In each of the fluid channels, adjacent the gauge region, is an opening into an enclosed passage which passes internally through the bit body to an outlet which, in use, communicates with the annulus between the drill string and the wall of the borehole being drilled. The gauge region of the drill bit comprises a substantially continuous bearing surface which extends around the whole of the gauge region.
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