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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：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：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：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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公开(公告)号：US5732783A
公开(公告)日：1998-03-31
申请号：US584852
申请日：1996-01-11
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 providing a metal mandrel having said shank and internal passage, and providing on the mandrel, so as to be supported by it, a number of blade cores each having a portion extending outwardly and longitudinally of the central axis of the mandrel, casting infiltrated matrix material around at least a part of each core and around at least a part of the mandrel to form the blades, and then removing portions of the cores so as to detach each core from support by the mandrel to leave within each blade a core which is substantially wholly supported by the surrounding matrix material.
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：提供具有所述柄和内部通道的金属心轴，并且在心轴上提供由其支撑的多个刀片芯，每个刀片芯具有向外和纵向延伸的部分 的心轴的中心轴线，围绕每个芯部的至少一部分并围绕心轴的至少一部分铸造渗透的基质材料以形成刀片，然后去除芯部分，以便通过 心轴在每个叶片内离开基本上完全由周围基质材料支撑的芯。
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公开(公告)号：US07025156B1
公开(公告)日：2006-04-11
申请号：US08972781
申请日：1997-11-18
申请人： Douglas Caraway
发明人： Douglas Caraway
摘要： A rotary drill bit is used both for milling a casing window and drilling a lateral borehole into subterranean earthen materials, without the prior need of having separate drill bits for milling of the casing and for drilling of the borehole. The rotary drill bit is lowered into a casing set within a borehole; and the drill bit is rotated to engage an inner surface of the casing. A first set of cutting elements on the drill bit remove casing material to mill a casing window. The drill bit is then moved through the casing window so that a second set of cutting elements on the drill bit create a lateral wellbore in subterranean earthen material.
摘要翻译： 旋转式钻头既用于铣削套管窗口，并将侧向钻孔钻到地下土层中，而不需要先前需要具有用于铣削壳体的钻头和用于钻孔的独立钻头。 旋转钻头下降到钻孔内的套管中; 并且钻头旋转以接合壳体的内表面。 钻头上的第一组切割元件去除外壳材料以铣削套管窗口。 然后将钻头移动通过套管窗口，使得钻头上的第二组切割元件在地下土层中形成侧向井筒。
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