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1. 发明授权

US06216805B1 Dual grade carbide substrate for earth-boring drill bit cutting elements, drill bits so equipped, and methods 有权
标题翻译：双级硬质合金基体用于钻孔钻头切割元件，钻头如此配备，方法
公开(公告)号：US06216805B1
公开(公告)日：2001-04-17
申请号：US09351509
申请日：1999-07-12
申请人： Roger Lays , Mohammad Swadi
发明人： Roger Lays , Mohammad Swadi
IPC分类号： E21B1046
CPC分类号： E21B10/573 , C04B35/6455 , C04B37/021 , C04B2235/668 , C04B2237/361 , C04B2237/363 , C04B2237/401 , C04B2237/405 , C04B2237/76 , E21B10/5735
摘要： A cutting element substrate for use with an earth-boring drill bit. The substrate includes a base, or outer shell, with a cavity opening to an end thereof. The base is fabricated from an erosion-resistant and abrasion-resistant material. A core that is configured substantially complementarily to the cavity is disposed within the cavity. The core base is fabricated from a material that is more ductile than the material of the base. The core and base each includes a cutting end to which a superabrasive cutting table, such as a polycrystalline diamond compact, may be secured. The substrate may be secured within a corresponding receptacle of a bit body in order to secure a superabrasive cutting table to the bit body in a desired orientation. The present invention also includes methods of fabricating the cutting element substrate.
摘要翻译：一种用于钻孔钻头的切割元件基底。基底包括一个底部或外壳，其中一个空腔通向其一端。基座由耐腐蚀和耐磨材料制成。配置在腔体基本上互补的芯部设置在空腔内。芯基由比基材材料更具延展性的材料制成。芯和基座各自包括切割端，可以固定超级磨料切割台，例如多晶金刚石致密体。衬底可以被固定在钻头体的相应的容器内，以便以期望的方向将超级磨料切割台固定到钻头体上。本发明还包括制造切割元件基板的方法。

2. 发明授权

US06659199B2 Bearing elements for drill bits, drill bits so equipped, and method of drilling 有权
标题翻译：钻头轴承元件，钻头如此配备，以及钻孔方法
公开(公告)号：US06659199B2
公开(公告)日：2003-12-09
申请号：US09929537
申请日：2001-08-13
申请人： Mohammad Swadi
发明人： Mohammad Swadi
IPC分类号： E21B1046
CPC分类号： E21B10/43 , B33Y80/00 , E21B10/46
摘要： A rotary drag bit carrying PDC cutters and elongated bearing elements associated with at least some of the PDC cutters on the bit face thereof Lateral positioning and angular positioning of the elongated bearing elements are adjusted so that all portions of an elongated bearing element travel substantially completely within a tubular clearance volume defined by the path through the formation being drilled by a PDC cutter with which that elongated bearing element is associated, the associated PDC cutter being positioned at about the same radius from the bit centerline as the elongated bearing element. A method of drilling and a method of drill bit design are also disclosed.
摘要翻译：一个带有PDC刀具和细长轴承元件的旋转牵引钻头，与钻头面上的至少一些PDC刀具相关联，调节细长轴承元件的横向定位和角度定位，使得细长轴承元件的所有部分基本上完全地在由通过所述地层的路径限定的管状间隙容积由与所述细长轴承元件相关联的PDC切割器钻出，所述相关联的PDC切割器定位成与所述细长轴承元件距钻头中心线大致相同的半径。还公开了一种钻孔方法和钻头设计方法。

3. 发明授权

US5996713A Rolling cutter bit with improved rotational stabilization 失效
标题翻译：滚动刀头，改善旋转稳定性
公开(公告)号：US5996713A
公开(公告)日：1999-12-07
申请号：US926730
申请日：1997-09-10
申请人： Rudolf C. O. Pessier , John V. Kenner , Matthew R. Isbell , Mohammad Swadi , Danny E. Scott
发明人： Rudolf C. O. Pessier , John V. Kenner , Matthew R. Isbell , Mohammad Swadi , Danny E. Scott
IPC分类号： E21B10/08 , E21B17/10
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。

4. 发明授权

US5890550A Earth-boring bit with wear-resistant material 失效
标题翻译：地脚钻头采用耐磨材料
公开(公告)号：US5890550A
公开(公告)日：1999-04-06
申请号：US854200
申请日：1997-05-09
申请人： Mohammad Swadi , Brian Wiesner , Greg Van Klompenburg
发明人： Mohammad Swadi , Brian Wiesner , Greg Van Klompenburg
IPC分类号： E21B10/16 , E21B10/52 , E21B10/50
CPC分类号： E21B10/16 , E21B10/52
摘要： An earth-boring bit has a bit body that is threaded at one end for connection into a drill string. At least one cantilevered bearing shaft depends inwardly and downwardly from the bit body. A cutter is mounted for rotation on each bearing shaft and includes a plurality of cutting elements arranged in generally circumferential rows. At least one wear-resistant element is secured to the bit body between the lower end of the bit body and the threaded end, the wear-resistant element being elongate or generally oblong in cross-section.
摘要翻译：一个钻孔钻头有一个在一端螺纹连接到钻柱中的钻头体。至少一个悬臂轴承轴从钻头体向内和向下取向。安装刀具以在每个轴承轴上旋转并且包括以大致圆周排布置的多个切割元件。至少一个耐磨元件固定在钻头体的下端和螺纹端之间的钻头体上，该耐磨元件是细长的或大体上长圆形的横截面。

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