公开(公告)号：US06598689B1

公开(公告)日：2003-07-29

申请号：US09641109

申请日：2000-08-17

申请人： Robert Harlan Slaughter, Jr. ,  Fakhroldin Mohammad Jadbabaei

发明人： Robert Harlan Slaughter, Jr. ,  Fakhroldin Mohammad Jadbabaei

IPC分类号： E21B1008

CPC分类号： E21B10/08 ,  B23K26/356

摘要： A roller cone for a drill bit is disclosed which includes a cone body having a plurality of sockets. An interior portion of at least one of the sockets is treated on an interior surface of the socket to provide a residual compressive stress proximate the interior of the socket to reduce stress cracking. Forms of treating include shot peening, laser shock peening and hammer peening. In one embodiment, the socket is treated over approximately the lower 50 percent of the lateral wall. In another embodiment, the socket is treated on the bottom surface from the lateral wall inward approximately 33 percent of the diameter of the socket. Another aspect of the invention is a roller cone for a drill bit including a cone body having a plurality of sockets formed in the cone. In this aspect, an interior portion of at least one of the sockets is locally annealed on an interior surface of the socket. In one embodiment, the socket is locally annealed over approximately the lower 50 percent of the lateral wall. In another embodiment, the socket is locally annealed on the bottom surface from the lateral wall inward approximately 33 percent of the diameter of the socket.

摘要翻译： 公开了一种用于钻头的辊筒，其包括具有多个插座的锥体。 在插座的内表面上处理至少一个插座的内部部分，以提供靠近插座内部的残余压缩应力，以减少应力开裂。 治疗形式包括喷丸硬化，激光冲击硬化和锤击硬化。 在一个实施例中，插座在大致围绕侧壁的较低的50％处被处理。 在另一个实施例中，插座在底壁上从侧壁向内处理大约是插座直径的33％。 本发明的另一方面是一种用于钻头的辊锥体，其包括具有形成在锥体中的多个插座的锥体。 在这方面，至少一个插座的内部部分在插座的内表面上局部退火。 在一个实施例中，插座在大约低于侧壁的50％的范围上进行局部退火。 在另一个实施例中，插座在底面上从侧壁局部退火到插座直径的大约33％。

公开(公告)号：US06729418B2

公开(公告)日：2004-05-04

申请号：US10075052

申请日：2002-02-12

申请人： Robert Harlan Slaughter, Jr. ,  Peter Thomas Cariveau ,  Vincent Wayne Shotton

发明人： Robert Harlan Slaughter, Jr. ,  Peter Thomas Cariveau ,  Vincent Wayne Shotton

IPC分类号： E21B922

CPC分类号： E21B10/28

摘要： A back reaming tool is disclosed which includes a tool body adapted to be coupled to a drill string, and at least one roller cone rotatably mounted to a leg and having cutting elements disposed thereon. The leg is removably coupled to the tool body. The at least one roller cone is open at only one axial end thereof.

摘要翻译： 公开了一种后铰孔工具，其包括适于联接到钻柱的工具主体，以及至少一个可旋转地安装到腿上并具有设置在其上的切割元件的滚子锥体。 腿可拆卸地联接到工具主体。 至少一个滚子锥体在其一个轴向端处是开放的。