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1. 发明授权

US5061293A Cutting elements for rotary drill bits 失效
标题翻译：旋转钻头切割元件
公开(公告)号：US5061293A
公开(公告)日：1991-10-29
申请号：US523322
申请日：1990-05-14
申请人： John D. Barr , Thomas A. Newton, Jr.
发明人： John D. Barr , Thomas A. Newton, Jr.
IPC分类号： B23P15/28 , E21B10/56 , E21B10/567
CPC分类号： E21B10/567 , B23P15/28
摘要： A preform cutting element for a rotary drill bit includes a layer of polycrystalline diamond material, the rear face of which is bonded to the front face of a backing layer of less hard material, such as tungsten carbide. The rear face of the backing layer is substantially greater in area than the rear face of the diamond layer. A method of manufacturing such cutting elements comprises forming an intermediate structure comprising polycrystalline diamond material bonded between two outer layers of tungsten carbide, and then cutting the intermediate structure to provide two pieces, each of the pieces including part of the diamond material and at least a major part of a respective one of the two outer layers.
摘要翻译：用于旋转钻头的预成型件切割元件包括多晶金刚石材料层，其后表面结合到诸如碳化钨之类的较硬硬质材料的背衬层的前表面。背衬层的后表面的面积比金刚石层的后表面大得多。制造这种切割元件的方法包括形成包括结合在两个碳化钨外层之间的多晶金刚石材料的中间结构，然后切割中间结构以提供两个片，每个片包括金刚石材料的一部分和至少一个两个外层中的相应一个的主要部分。

2. 发明授权

US5025874A Cutting elements for rotary drill bits 失效
公开(公告)号：US5025874A
公开(公告)日：1991-06-25
申请号：US333120
申请日：1989-04-04
申请人： John D. Barr , Thomas A. Newton, Jr.
发明人： John D. Barr , Thomas A. Newton, Jr.
IPC分类号： B23P5/00 , B23P15/28 , E21B10/56 , E21B10/567
CPC分类号： E21B10/5673 , B23P15/28 , B23P5/00
摘要： A preform cutting element for a rotary drill bit includes a layer of polycrystalline diamond material, the rear face of which is bonded to the front face of a backing layer of less hard material, such as tungsten carbide. The rear face of the backing layer is substantially greater in area than the rear face of the diamond layer. A method of manufacturing such cutting elements comprises forming an intermediate structure comprising polycrystalline diamond material bonded between two outer layers of tungsten carbide, and then cutting the intermediate structure to provide two pieces, each of the pieces including part of the diamond material and at least a major part of a respective one of the two outer layers.

3. 发明授权

US4995887A Cutting elements for rotary drill bits 失效
标题翻译：旋转钻头切割元件
公开(公告)号：US4995887A
公开(公告)日：1991-02-26
申请号：US333297
申请日：1989-04-04
申请人： John D. Barr , Thomas A. Newton, Jr.
发明人： John D. Barr , Thomas A. Newton, Jr.
IPC分类号： B23P5/00 , B23P15/28 , E21B10/56 , E21B10/567
CPC分类号： E21B10/5673 , B23P15/28 , B23P5/00
摘要： A cutting element for a rotary drill bit comprises a layer of polycrystalline diamond material having a front face and a rear face, a backing layer of less hard material bonded to the rear face of the diamond layer, and a front layer of less hard material bonded to the front face of the diamond layer and extending across at least the major part thereof. The front layer is thinner than the backing layer, at least in the vicinity of the cutting edge of the cutting element.

4. 发明授权

US5244039A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US5244039A
公开(公告)日：1993-09-14
申请号：US786035
申请日：1991-10-31
申请人： Thomas A. Newton, Jr. , John M. Clegg
发明人： Thomas A. Newton, Jr. , John M. Clegg
IPC分类号： E21B10/42 , E21B10/43 , E21B10/56 , E21B10/567 , E21B10/60
CPC分类号： E21B10/43 , E21B10/567 , E21B10/602
摘要： A rotary drill bit for drilling holes in subsurface formations comprises a bit body having a shank for connection to a drill string, a plurality of preform primary cutting elements mounted on the bit body and defining a primary cutting profile having a downwardly convex nose portion. There are associated with at least certain of the primary cutting elements respective secondary elements which are spaced inwardly of the primary profile. The distance of the secondary elements from the primary profile, when measured in a direction perpendicular to said profile, is generally greater for secondary elements nearer the nose portion than it is for secondary elements further away from the nose portion, and is preferably such that the vertical distance of the secondary elements from the profile is substantially constant.
摘要翻译：用于在地下构造中钻孔的旋转钻头包括具有用于连接到钻柱的柄的钻头体，安装在钻头体上并限定具有向下凸出的鼻部的主切割轮廓的多个预成型主切割元件。至少有一些主要切割元件与主要轮廓向内间隔的相应次要元件相关联。当沿垂直于所述轮廓的方向测量时，次要元件与初级轮廓的距离对于比鼻部更靠近鼻部的次要元件大体上比对于远离鼻部的次要元件更大，并且优选地使得次要元件与轮廓的垂直距离基本上是恒定的。

5. 发明授权

US5163524A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US5163524A
公开(公告)日：1992-11-17
申请号：US785543
申请日：1991-10-31
申请人： Thomas A. Newton, Jr. , John M. Clegg
发明人： Thomas A. Newton, Jr. , John M. Clegg
IPC分类号： E21B10/56 , E21B10/567 , E21B17/10
CPC分类号： E21B10/567 , E21B17/1092
摘要： A rotary drill bit comprises a bit body carrying a plurality of preform cutting elements, and a plurality of circumferentially spaced gauge pads which, in use, engage the surrounding formation. Some of the gauge pads carry cutting elements and others are free of cutting elements. To reduce cost, each gauge pad which is free of cutting elements has an outer bearing surface which is more abrasion resistant than the outer surfaces of the gauge pads which carry cutting elements.
摘要翻译：旋转钻头包括承载多个预成型件切割元件的钻头体和在使用中与周围地层接合的多个周向间隔的量规垫。一些测量垫带有切割元件，而其他的没有切割元件。为了降低成本，每个没有切割元件的规格垫具有比承载切割元件的规格垫的外表面更耐磨的外部支承表面。

6. 发明授权

US5135061A Cutting elements for rotary drill bits 失效
标题翻译：切削元件旋转钻头
公开(公告)号：US5135061A
公开(公告)日：1992-08-04
申请号：US562115
申请日：1990-08-03
申请人： Thomas A. Newton, Jr.
发明人： Thomas A. Newton, Jr.
IPC分类号： B23B27/14 , B24D99/00 , B28D1/18 , E21B10/56 , E21B10/567
CPC分类号： E21B10/5673 , B23B27/148 , B24D99/005 , B28D1/188 , Y10T407/27
摘要： A preform cutting element for a rotary drill bit for use in drilling or coring holes in subsurface formations includes a cutting table 12, 13 of superhard material such as polycrystalline diamond. The rear face of the cutting table is bonded to a substrate 11 of less hard material, such as cemented tungsten carbide. A front portion 12 of the cutting table comprises a form of superhard material which is less wear-resistant than the superhard material forming the remainder 13 of the cutting table. The provision of the less wear-resistant superhard material at the front cutting faces reduces the tendency of the cutting table to spall.

7. 发明授权

US4844185A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US4844185A
公开(公告)日：1989-07-04
申请号：US119145
申请日：1987-11-10
申请人： Thomas A. Newton, Jr. , Michael C. Regan
发明人： Thomas A. Newton, Jr. , Michael C. Regan
IPC分类号： E21B10/42 , E21B10/43
CPC分类号： E21B10/43
摘要： A rotary drill bit for use in drilling or coring deep holes in subsurface formations comprises a bit body having a leading face and a gauge region, cutting elements mounted at the leading face of the bit body, and a passage in the bit body communicating with nozzles in the leading face of the bit body for supplying drilling fluid to the face for cooling and cleaning the cutting elements. Certain of the cutting elements each comprise a preform cutting element having a superhard front cutting face providing a cutting edge, and others of the cutting elements each comprise particles of hard material embedded in a front layer of a less hard material to form a cutting layer having a cutting edge. The distribution of the cutting elements over the leading face of the bit is such that the proportion of the combined length of cutting edges provided by preform cutting elements to the combined length of cutting edges provided by embedded-particle cutting elements generally increases with distance from the central axis of rotation of the bit.
摘要翻译：用于钻孔或取芯地下构造中的深孔的旋转钻头包括具有前表面和测量区域的钻头体，安装在钻头体的前表面的切削元件和钻头体中与喷嘴连通的通道在钻头体的前表面中，用于将钻井液供给到表面用于冷却和清洁切割元件。某些切割元件各自包括具有提供切割边缘的超硬前切割面的预成型件切割元件，并且其它切割元件各自包括嵌入较硬硬质材料的前层中的硬质材料颗粒，以形成具有一个尖端。切割元件在钻头的前表面上的分布使得由预成型件切割元件提供的切削刃的组合长度与由嵌入式粒子切割元件提供的切割边缘的组合长度的比例通常随着距离位的中心轴旋转。

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