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1. 发明授权

US5967246A Rotary drill bits 有权
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
IPC分类号： E21B10/00 , E21B10/26 , E21B10/54 , E21B10/55 , E21B10/60 , E21B17/10
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.

2. 发明授权

US5651421A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US5651421A
公开(公告)日：1997-07-29
申请号：US541771
申请日：1995-10-10
申请人： Alex Newton , Malcolm R. Taylor , John M. Fuller , Andrew Murdock
发明人： Alex Newton , Malcolm R. Taylor , John M. Fuller , Andrew Murdock
IPC分类号： E21B10/42 , E21B10/43 , E21B10/54 , E21B10/55 , E21B10/60 , E21B10/16
CPC分类号： E21B10/43 , E21B10/55 , 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 number of circumferentially spaced blades on the bit body each extending outwardly away from the central axis of rotation of the bit, a number of cutters mounted side-by-side along each blade, and a passage in the bit body for supplying drilling fluid to the surface of the bit for cleaning and cooling the cutters. The blades comprise alternating primary and secondary blades. The cutters on the primary blades are primary cutters which are located at different radial distances from the bit axis so as to define a cutting profile which, in use, covers substantially the whole of the bottom of the bore hole being drilled. At least the majority of the cutters on the secondary blades are secondary cutters each of which is located at substantially the same radial distance from the bit axis as an associated primary cutter on the preceding primary blade.
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，钻头体上的多个周向间隔开的叶片每个从钻头的中心旋转轴线向外延伸，沿着每个叶片并排安装的切割器，以及钻头体中的用于向钻头表面提供钻井液的通道，用于清洁和冷却切割器。叶片包括交替的主叶片和次叶片。主叶片上的切割器是位于与钻头轴线不同的径向距离处的初级切割器，以便限定切割轮廓，该切割轮廓在使用中基本覆盖被钻孔的整个底部的底部。至少大多数次级叶片上的切割器是二次切割器，每个切割器位于与前一主叶片上的相关联的主切割器相比从钻头轴线基本相同的径向距离处。

3. 发明授权

US5222566A Rotary drill bits and methods of designing such drill bits 失效
标题翻译：旋转钻头和设计这种钻头的方法
公开(公告)号：US5222566A
公开(公告)日：1993-06-29
申请号：US828425
申请日：1992-01-31
申请人： Malcolm R. Taylor , Andrew Keohane
发明人： Malcolm R. Taylor , Andrew Keohane
IPC分类号： E21B10/42 , E21B10/43 , E21B10/60
CPC分类号： E21B10/43 , E21B10/602
摘要： A rotary drill bit comprises a bit body having a shank for connection to a drill string, a plurality of cutter assemblies mounted on the bit body, and a passage in the bit body for supplying drilling fluid to the surface of the bit. Certain cutter assemblies on the bit body are adapted to exhibit a volume factor which is significantly greater than the volume factor of other cutter assemblies on the bit body, with increase of rate of penetration, and at least the majority of said cutter assemblies of higher volume factor are better adapted for cutting softer formations than at least the majority of said other cutter assemblies. The bit therefore tends to act as a "heavy set" drill bit at lower rates of penetration in hard formations, and as a "light set" drill bit at higher rates of penetration in softer formations, and therefore tends to drill each formation more efficiently.

4. 发明授权

US5174396A Cutter assemblies for rotary drill bits 失效
标题翻译：旋转钻头组合切割机组
公开(公告)号：US5174396A
公开(公告)日：1992-12-29
申请号：US265018
申请日：1988-10-31
申请人： Malcolm R. Taylor , Joseph A. Gasan
发明人： Malcolm R. Taylor , Joseph A. Gasan
IPC分类号： E21B10/56 , E21B10/567
CPC分类号： E21B10/5673
摘要： A cutter assembly for a rotary drill bit comprises an elongate stud to be received in a socket in the surface of the bit body, the stud having mounted at one end thereof a preform cutting element. At least a major part of the stud is generally in the form of a cylinder of a circular cross-section having two symmetrically disposed flats extending longitudinally thereof, the flats being inclined towards the longitudinal axis of the stud as they extend towards the end of the stud remote from the cutting element. The flats allow the cutter assemblies to be packed together more closely side-by-side across a convexly curved surface of the body of the drill bit.
摘要翻译：用于旋转钻头的切割器组件包括待接收在钻头体的表面中的插座中的细长螺柱，所述螺柱在其一端安装有预成型件切割元件。螺柱的至少主要部分通常为圆形横截面的形式，其具有两个对称设置的纵向延伸的平面，当它们朝着螺栓的端部延伸时，平面朝向螺柱的纵向轴线倾斜螺柱远离切割元件。这些平面允许刀具组件在钻头本体的凸形弯曲表面上更紧密地并排堆放在一起。

5. 发明授权

US4733735A Rotary drill bits 失效
标题翻译：旋转钻头
公开(公告)号：US4733735A
公开(公告)日：1988-03-29
申请号：US913101
申请日：1986-09-29
申请人： John D. Barr , John M. Fuller , Malcolm R. Taylor
发明人： John D. Barr , John M. Fuller , Malcolm R. Taylor
IPC分类号： E21B10/26 , E21B10/56 , E21B10/567 , E21B10/60
CPC分类号： E21B10/567 , E21B10/26 , E21B10/602
摘要： 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.
摘要翻译：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

US4669556A Drill bit and cutter therefor 失效
标题翻译：钻头和刀具
公开(公告)号：US4669556A
公开(公告)日：1987-06-02
申请号：US693848
申请日：1985-01-25
申请人： John D. Barr , Terry R. Matthias , Malcolm R. Taylor
发明人： John D. Barr , Terry R. Matthias , Malcolm R. Taylor
IPC分类号： E21B10/42 , E21B10/43 , E21B10/56 , E21B10/573 , E21B10/46
CPC分类号： E21B10/43 , E21B10/573
摘要： An elongate cutter for a drag-type drill bit includes a stud defining one end thereof and a cutting formation comprising a cutting face generally adjacent the other end. Length extends from one end to the other, depth extends generally transverse to the cutting face as well as transverse to the length, and width extends transverse to both length and depth. The stud has a cross section transverse to its length such that the cross section cannot be circumscribed by a reference circle whose diameter is equal to the maximum width of the cross section. The cross section also has an assumed section modulus, in the direction of depth, greater than that of the reference circle. The leading side of the cutter comprises a first planar zone adjacent the one end and a second planar zone adjacent the other end, and on which the cutting formation is carried. The maximum lateral dimension of the leading side is generally greater than or equal to the maximum width of the cutter.
摘要翻译：用于拖曳式钻头的细长切割器包括限定其一端的螺柱和包括大致相邻于另一端的切割面的切割结构。长度从一端延伸到另一端，深度通常横切切割面并且横向于长度延伸，宽度横向于长度和深度。螺柱具有横向于其长度的横截面，使得横截面不能被直径等于横截面的最大宽度的参考圆包围。横截面在深度方向上也具有大于参考圆的横截面模数。切割器的前侧包括邻近一端的第一平面区域和与另一端相邻的第二平面区域，并且在其上承载切割结构。前侧的最大横向尺寸通常大于或等于切割器的最大宽度。

7. 发明授权

US5992547A Rotary drill bits 有权
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
IPC分类号： E21B10/00 , E21B10/26 , E21B10/54 , E21B10/55 , E21B10/60 , E21B17/10
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.

8. 发明授权

US5904213A Rotary drill bits 失效
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
IPC分类号： E21B10/00 , E21B10/26 , E21B10/54 , E21B10/55 , E21B10/60 , E21B17/10
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.

9. 发明授权

US5119892A Notary drill bits 失效
标题翻译：名义钻头
公开(公告)号：US5119892A
公开(公告)日：1992-06-09
申请号：US616635
申请日：1990-11-21
申请人： John M. Clegg , Malcolm R. Taylor , Leslie R. Hawke
发明人： John M. Clegg , Malcolm R. Taylor , Leslie R. Hawke
IPC分类号： E21B10/42 , E21B10/43 , E21B10/54 , E21B10/55
CPC分类号： E21B10/43 , E21B10/55
摘要： A rotary drill bit comprises a bit body having a shank for connection to a drill string and a passage for supplying drilling fluid to the face of the bit, which carries a plurality of polycrystalline diamond preform cutting elements. The cutting elements on one side of a diameter of the bit have positive side rake and the cutting elements on the other side of the diameter have negative side rake so that the vectorial sum of the reaction forces between the formation being drilled and the cutting elements provides a resultant lateral imbalance force acting on the bit body as it rotates in use. The gauge of the bit body includes low friction bearing pads so located as to transmit the resultant lateral force to the sides of the borehole. Since the bearing pads are of low friction, they slide around the surface of the formation and any tendency for bit whirl to be initiated is reduced. The lateral imbalance force may also be provided by varying the back rake of the cutting elements on different parts of the bit, or by including an asymmetrical mass of material in the bit body.

10. 发明授权

US4987800A Cutter elements for rotary drill bits 失效
标题翻译：用于旋转钻头的刀具元件
公开(公告)号：US4987800A
公开(公告)日：1991-01-29
申请号：US371711
申请日：1989-06-26
申请人： Joseph A. Gasan , Malcolm R. Taylor , Phillip Bex
发明人： Joseph A. Gasan , Malcolm R. Taylor , Phillip Bex
IPC分类号： B23P15/28 , E21B10/56 , E21B10/567
CPC分类号： E21B10/567 , B23P15/28 , Y10S76/12
摘要： A preform cutting element, for a rotary drill bit, includes a layer of polycrystalline diamond material having a front cutting face, a rear face and a peripheral surface, a cutting edge being provided by at least part of the junction between the front cutting face and the peripheral surface. The diamond layer is formed around its periphery, adjacent the cutting edge, with a row of spaced apertures. Each aperture is in the form of a bore, formed for example by a laser, which is inclined at 45.degree. to the cutting face and extends completely through the diamond layer from the cutting face to the peripheral surface thereof. The apertures serve to inhibit the propagation of spalling across the cutting face from the cutting edge.

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