公开(公告)号：US4252202A

公开(公告)日：1981-02-24

申请号：US63709

申请日：1979-08-06

申请人： James A. Purser, Sr.

发明人： James A. Purser, Sr.

IPC分类号： E21B10/42

CPC分类号： E21B10/627 ,  E21B10/42

摘要： A drill bit consisting of a tubular, main body member having a set of threads at one end thereof connectable to a drill stem and an annular mounting edge on an opposite end thereof, the mounting edge having a plurality of circumferentially spaced, longitudinally disposed recesses, the main body member having an enlarged annular portion adjacent the annular mounting edge, the enlarged portion of the main body member having a plurality of circumferentially spaced recesses disposed at an angle relative to the axis of the main body member, each of the recesses in the enlarged portion of the main body member being disposed between a set of recesses in the annular mounting edge and providing a pair of converging surfaces, a plurality of blades, each of the blades being disposed in a recess in the mounting edge, substantially radially relative to the axis of the main body member, having a recess receiving a wall portion of the main body member and a surface aligned with a surface of an adjacent set of the sets of converging surfaces, and a locking ring mountable on the main body member, having a plurality of fingers received in the recesses in the enlarged portion of the main body member, engaging a set of converging surfaces thereof and an aligned surface of the adjacent blade member in wedging relation for securing the blade members on the main body member.

摘要翻译： 一种钻头，包括管状的主体构件，其一端具有一组螺纹，其可连接到钻杆杆，在其相对端上具有环形安装边缘，所述安装边缘具有多个周向间隔开的纵向设置的凹部， 所述主体构件具有与所述环形安装边缘相邻的扩大的环形部分，所述主体构件的所述扩大部分具有多个相对于所述主体构件的轴线成一定角度设置的周向间隔开的凹部， 主体部件的扩大部分设置在环形安装边缘中的一组凹部之间并且提供一对会聚表面，多个叶片，每个叶片设置在安装边缘的凹部中，大致径向相对于 所述主体构件的轴线具有容纳所述主体构件的壁部的凹部和与所述主体构件的表面对准的表面 一组会聚表面，以及可安装在主体构件上的锁定环，其具有容纳在主体构件的扩大部分中的凹部中的多个指状物，其接合一组会聚表面和对准表面 的楔形关系，用于将叶片构件固定在主体构件上。