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公开(公告)号：US5592995A
公开(公告)日：1997-01-14
申请号：US468692
申请日：1995-06-06
IPC分类号： E21B10/52 , E21B10/56 , E21B10/567 , E21B10/573 , E21B10/16
CPC分类号： E21B10/5673 , E21B10/52 , E21B10/5676 , E21B10/5735 , E21B17/1092
摘要： An earth-boring bit has a bit body and at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and includes a plurality of cutting elements arranged in generally circumferential rows including an outer or heel row of cutting elements. At least one of the cutting elements in the heel row has an outermost surface at least partially formed of super-hard material that defines a cutting edge for shearing engagement with the sidewall of the borehole as the cutters roll and slide over the bottom of the borehole during drilling operations.
摘要翻译： 钻头具有一定体积，至少有一个悬臂轴承轴从钻头体向内和向下偏移。 刀具被安装成用于在轴承轴上旋转，并且包括多个切割元件，该切割元件大致圆周排布置，包括外部或后排的切割元件。 后跟行中的至少一个切割元件具有至少部分由超硬材料形成的最外表面，该超硬材料限定了切割刃，用于与钻孔的侧壁剪切接合，因为切割器在钻孔的底部滚动并滑动 在钻井作业。
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公开(公告)号：US5323865A
公开(公告)日：1994-06-28
申请号：US992869
申请日：1992-12-17
摘要： An earth-boring bit is provided with three cutters, at least one of the three cutters are provided with a heel cutting structure defined by a plurality of heel inserts having crests thereon, the heel inserts being disposed in at least one substantially circumferential heel row and the crests of the heel inserts being generally aligned traversely to the rotational axis of the cutter. At least another of the cutters is provided with a substantially circumferential row of axial inserts having crests thereon disposed proximally to the base of the cutter, the crests of the axial inserts being generally aligned with the axis of rotation of the cutter.
摘要翻译： 一个钻地钻具有三个切割器，三个切割器中的至少一个切割器设置有由多个在其上具有波峰的跟部插入件限定的跟部切割结构，所述后跟插入件设置在至少一个基本上圆周的后跟行中，并且 鞋跟插入物的顶部通常横向对准切割器的旋转轴线。 至少另一个切割器设置有基本上圆周的一排轴向插入件，其具有在其上靠近切割器的基部设置的波峰，所述轴向插入件的顶部大体上与切割器的旋转轴线对齐。
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公开(公告)号：US5996713A
公开(公告)日：1999-12-07
申请号：US926730
申请日：1997-09-10
CPC分类号： E21B17/1092 , E21B10/08
摘要： A rock bit has a body and three cutters that include generally conical surfaces, at least one of which contains an outermost, circumferential row of heel teeth that dislodge cuttings from the borehole wall and bottom. The heel teeth form a corner with the borehole wall with successive contact points defined by the path of outer edges of the heel teeth while rotating into, and prescribing, the corner as it spirals downwardly during drilling. The rotational axis of the cutter is offset from the geometric centerline or intended rotational axis of the bit. Stabilizing pads extend outwardly from the body, each concluding in a surface that contains a low-friction, wear-resistant surface that engage the wall of the borehole. The center of each surface is located directly across from the contact point of an opposed cutter.
摘要翻译： 岩石钻头具有主体和三个切割器，其包括大致圆锥形的表面，其中至少一个包含最外面的圆周排的后跟齿，其从钻孔壁和底部移除切屑。 脚跟齿形成具有钻孔壁的角部，其中连续接触点由跟部齿的外边缘的路径限定，同时在钻孔期间向下旋转并转向角部并且规定角部。 刀具的旋转轴线偏离钻头的几何中心线或预期旋转轴线。 稳定垫从身体向外延伸，每个结论在包含接合钻孔壁的低摩擦，耐磨表面的表面中。 每个表面的中心位于相对的切割器的接触点的正对面。
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4.发明授权
公开(公告)号：US5586612A
公开(公告)日：1996-12-24
申请号：US378345
申请日：1995-01-26
CPC分类号： E21B17/1092 , E21B10/08
摘要： An earth-boring bit has a bit body and at least a pair of cantilevered bearing shafts depending downwardly and inwardly therefrom. A first cutter is mounted for rotation on one of the bearing shafts and has a region of contact with the sidewall of the borehole. A second cutter is mounted for rotation on another of the bearing shafts and has a region of contact with the sidewall of the borehole that is non-opposite that of the first cutter. Stabilization is provided by a stabilizer pad carried on the bit body and arranged to be opposite the contact regions of the first and second cutters.
摘要翻译： 钻头具有一定体积和至少一对从其向内和向内悬置的悬臂轴承轴。 第一切割器安装成在其中一个轴承轴上旋转并且具有与钻孔的侧壁接触的区域。 安装第二切割器用于在另一个轴承轴上旋转，并且具有与钻孔的侧壁接触的区域，其与第一切割器的侧面不相反。 稳定性由承载在钻头体上并且布置成与第一和第二切割器的接触区域相对的稳定垫提供。
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公开(公告)号：US5542485A
公开(公告)日：1996-08-06
申请号：US373149
申请日：1995-01-17
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52
摘要： An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface and a heel surface. A plurality of cutting elements inserts are arranged in generally circumferential rows on the cutter. At least one chisel-shaped cutting element is secured to the gage surface. The chisel-shaped cutting element has a pair of surfaces converging to define a circumferential crest and is tilted toward the heel surface such that a line drawn through the center of the cutting element and its crest defines an acute angle of between about 15 and 75 degrees with the gage surface of the cutter.
摘要翻译： 钻头具有一个位体，并且至少一个切割器可旋转地固定到钻头体上。 切割器具有包括表面和跟部表面的切割器外壳表面。 多个切割元件插入件在切割器上大致圆周排布置。 至少一个凿状切割元件被固定到计量表面上。 凿状切割元件具有会聚的一对表面以限定圆周的顶部并且朝向跟部表面倾斜，使得通过切割元件及其顶部的中心绘制的线限定在大约15至75度之间的锐角 与刀具的表面。
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公开(公告)号：US5351768A
公开(公告)日：1994-10-04
申请号：US89318
申请日：1993-07-08
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52
摘要： An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface intersecting a heel surface. A plurality of hard metal inserts are arranged in generally circumferential rows on the cutter and include a heel row of heel inserts on the heel surface of the cutter and a gage row of gage inserts on the gage surface of the cutter. At least one scraper insert, formed of material more wear-resistant than that of the cutter shell surface, is secured to the cutter shell surface generally at the intersection of the gage and heel surfaces. The scraper insert includes a gage and a heel insert surface. The gage and heel surfaces of the scraper insert converge to define a cutting edge for engagement with the sidewall of the borehole, the insert surface defining a positive rake angle with respect to the sidewall of the borehole of between 0 and 15 degrees. The cutting edge projecting from the heel surface an amount not greater than the lesser of one-half the projection of the heel inserts from the heel surface and 30% of the pitch between the heel inserts.
摘要翻译： 钻头具有一个位体，并且至少一个切割器可旋转地固定到钻头体上。 切割器具有切割器外壳表面，其包括与跟部表面相交的计量表面。 多个硬金属插入件在切割器上大致圆周排布置，并且包括在切割器的跟部表面上的跟部插入物的后跟行和在切割器的计量表面上的量规插入件的一排。 至少一个由比刀具表面更耐磨的材料形成的刮刀插入件通常在量规和跟部表面的交叉处固定到刀具壳体表面。 刮刀插入件包括量具和跟部插入表面。 刮刀插入件的表面和跟部表面会聚以限定用于与钻孔的侧壁接合的切割边缘，插入表面相对于钻孔的侧壁在0和15度之间限定正的前角。 从后跟表面突出的切割刃不大于后跟插入物从后跟表面的一半的突起中的较小者和脚后跟插入物之间的间距的30％的量。
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公开(公告)号：US4984643A
公开(公告)日：1991-01-15
申请号：US496820
申请日：1990-03-21
IPC分类号： E21B10/16
CPC分类号： E21B10/16
摘要： A three cone earth boring bit having circumferential rows of earth disintegrating teeth of wear resistant inserts of selected projection from the cone surfaces, one cone having an inner row separated from a heel row by a narrow circumferential groove and second cone having a hell-catching row that intermeshes with the narrow groove by an amount to minimize balling. A nozzle directs a jet stream with a high velocity core past the cone and inserts of adjacent cutters to the bore hole bottom to break up the filter cake while the lower velocity skirt strikes the material packed between the inserts of adjacent cores. A row of small diameter, recessed reaming inserts replaces the conventional heel row on the cone having a hell-catching row, thus providing space for the lateral displacement of the material generated between adjacent inserts in the critical heel-catching row.
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8.发明授权Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped 有权超级磨料切割组件，包括不同方向的切割器和如此装备的钻头公开(公告)号：US06408958B1
公开(公告)日：2002-06-25
申请号：US09694518
申请日：2000-10-23
申请人： Matthew R. Isbell , Rudolf C. O. Pessier , Michael L. Doster , Mark W. Dykstra , William H. Heuser
发明人： Matthew R. Isbell , Rudolf C. O. Pessier , Michael L. Doster , Mark W. Dykstra , William H. Heuser
IPC分类号： E21B1016
CPC分类号： E21B10/43 , E21B10/567 , E21B10/602
摘要： A cutting assembly comprised of first and second superabrasive cutting elements including at least one rotationally leading cutting element having a cutting face oriented generally in a direction of intended rotation of a bit on which the assembly is mounted to cut a subterranean formation with a cutting edge at an outer periphery of the cutting face, and a rotationally trailing cutting element oriented substantially transverse to the direction of intended bit rotation and including a relatively thick superabrasive table configured to cut the formation with a cutting edge located between a beveled surface at the side of the superabrasive table and an end face thereof. A rotationally trailing cutting element may be associated with and disposed at a location on the bit at least partially laterally intermediate locations of two rotationally leading cutting elements. Drill bits equipped with the cutting assembly are also disclosed.
摘要翻译： 一种由第一和第二超级磨料切割元件组成的切割组件，包括至少一个旋转导向切割元件，该切割元件具有大致沿钻头的预期旋转方向定向的切割面，在该切割方向上安装有组件以切割具有切割边缘的地下岩层 切割面的外周边，以及基本上横向于预期钻头旋转方向定向的旋转后切割元件，并且包括相对较厚的超级磨料台，其被配置为用切割边缘切割地层，所述切割边缘位于所述切割面侧面的倾斜表面之间 超研磨台及其端面。 旋转拖尾切割元件可以与两个旋转导向的切割元件的至少部分横向中间位置相关联并且布置在钻头上的位置处。 还公开了配有切割组件的钻头。
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公开(公告)号：US5479997A
公开(公告)日：1996-01-02
申请号：US293228
申请日：1994-08-19
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52
摘要： An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface intersecting a heel surface. A plurality of hard metal inserts are arranged in generally circumferential rows on the cutter and include a heel row of heel inserts on the heel surface of the cutter and a gage row of gage inserts on the gage surface of the cutter. At least one scraper insert, formed of material more wear-resistant than that of the cutter shell surface, is secured to the cutter shell surface generally at the intersection of the gage and heel surfaces. The scraper insert includes a gage and a heel insert surface. The gage and heel surfaces of the scraper insert converge to define a cutting edge for engagement with the sidewall of the borehole, the heel insert surface defining a positive rake angle with respect to the sidewall of the borehole of between 0 and 15 degrees. The cutting edge projects from the heel surface an amount not greater than the lesser of one-half the projection of the heel inserts from the heel surface and 30% of the pitch between the heel inserts.
摘要翻译： 钻头具有一个位体，并且至少一个切割器可旋转地固定到钻头体上。 切割器具有切割器外壳表面，其包括与跟部表面相交的计量表面。 多个硬金属插入件在切割器上大致圆周排布置，并且包括在切割器的跟部表面上的跟部插入物的后跟行和在切割器的计量表面上的量规插入件的一排。 至少一个由比刀具表面更耐磨的材料形成的刮刀插入件通常在量规和跟部表面的交叉处固定到刀具壳体表面。 刮刀插入件包括量具和跟部插入表面。 刮刀插入件的量规和跟部表面会聚以限定用于与钻孔的侧壁接合的切割边缘，该后跟插入表面相对于钻孔的侧壁在0和15度之间限定正的前角。 切割边缘从脚跟表面突出一个量不大于后跟插入物从后跟表面的一半投影中的较小者和脚后跟插入物之间的间距的30％的量。
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公开(公告)号：US5311958A
公开(公告)日：1994-05-17
申请号：US949660
申请日：1992-09-23
摘要： An earth-boring bit is provided with three cutters, two of the three cutters are provided with heel disk cutting elements defined by a pair of generally oppositely facing disk surfaces that generally continuously converge to define a circumferential heel disk crest. One of the two cutters having heel disk elements is further provided with an inner disk cutting element.
摘要翻译： 一个镗孔设置有三个切割器，三个切割器中的两个设置有由一对大致相对的盘表面限定的跟部圆盘切割元件，其通常连续地会聚以限定圆周跟部圆盘顶部。 具有脚跟盘元件的两个切割器中的一个还设置有内盘切割元件。
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