公开(公告)号：US4654947A

公开(公告)日：1987-04-07

申请号：US803325

申请日：1985-12-02

申请人： Kenneth Davis

发明人： Kenneth Davis

IPC分类号： B23C5/22 ,  E21B10/56 ,  E21B10/567 ,  E21B10/62

CPC分类号： E21B10/567 ,  B23C5/22 ,  E21B10/62 ,  Y10T29/4973 ,  Y10T29/49822

摘要： Method and apparatus by which the cutting face of a drill bit is renewed. The drill bit has a cutting face comprised of a plurality of radially spaced apart stud assemblies, each received within a socket. A polycrystalline diamond disc forms one end of the stud assembly. The socket is in the form of a counterbore extending angularly into the bit body so that when a marginal end of the stud assembly is forced into a socket, a portion of the face of the diamond disc extends below the bottom of the bit body for engagement with the bottom of a borehole. A passageway communicates with the rear of the counterbore and extends back to a surface of the bit. Fluid pressure is effected within the passageway, thereby developing sufficient pressure differential across the stud assembly to cause the stud assembly to move respective to the socket. This action forces a marginal end of the stud assembly to move sufficiently respective to the socket so that the free marginal end of the stud assembly can be grasped by a tool and manipulated in a manner to bring an unused cutting edge of the diamond disc into operative cutting relationship respective to the bottom of the bit. The reoriented stud assembly is forced back onto seated relationship respective to the socket. The stud assembly includes a circumferentially extending seal means which cooperates with the socket interior with a piston-like action.

摘要翻译： 更新钻头切割面的方法和装置。 钻头具有由多个径向间隔开的螺栓组件组成的切割面，每个螺栓组件都容纳在套筒内。 多晶金刚石圆片形成螺柱组件的一端。 插座是沉头孔的形式，角度地延伸到钻头体中，使得当螺柱组件的边缘被迫进入插座时，金刚石圆盘的表面的一部分延伸到钻头体的底部以下以进行接合 与钻孔的底部。 通道与沉孔的后部连通并延伸回钻头的表面。 在通道内实现流体压力，从而在螺栓组件上形成足够的压力差，以使栓头组件相应地移动到插座上。 这种作用迫使螺柱组件的边缘端部充分地移动到插座上，使得螺柱组件的自由边缘端可以被工具抓住并且以使得金刚石圆盘的未使用的切削刃成为可操作的方式被操纵 切割关系相应的底部的位。 重新定向的螺柱组件被强制地回到与插座相对的就座关系上。 螺柱组件包括周向延伸的密封装置，其与插座内部与活塞状作用配合。

公开(公告)号：US4654948A

公开(公告)日：1987-04-07

申请号：US803331

申请日：1985-12-02

申请人： Kenneth Davis

发明人： Kenneth Davis

IPC分类号： B25B27/02 ,  E21B10/56 ,  E21B10/567 ,  E21B10/62 ,  B23P7/00 ,  E21C13/00

CPC分类号： E21B10/567 ,  B25B27/026 ,  E21B10/62 ,  Y10T29/4973 ,  Y10T29/49817 ,  Y10T29/49822 ,  Y10T408/04

摘要： A drill bit has a formation engaging face through which a plurality of counterbores are formed. A stud assembly having a polycrystalline diamond face thereon is forced into the counterbore in a close tolerance relationship therewith thereby providing frictional forces which prevent movement of the stud assembly respective to the drill bit. A passageway leads from the bottom of the counterbore back to a wall surface of the bit and emerges in spaced relationship respective to the entrance of the counterbore. Hydraulic pressure is effected within the passageway, thereby moving the stud assembly with a piston-like action. The stud assembly is next rotated to bring a new cutting face into cutting position. A tool, made in accordance with the present invention, forces the stud assembly back into the counterbore.

摘要翻译： 钻头具有形成多个沉孔的地层接合面。 其上具有多晶金刚石表面的螺柱组件以紧密公差的关系被迫进入沉孔，从而提供摩擦力，其阻止螺柱组件相应于钻头的运动。 通道从沉头孔的底部返回到钻头的壁表面，并且以相对于沉孔的入口间隔开的关系出现。 在通道内实现液压，从而以柱塞状动作移动螺柱组件。 螺柱组件接下来旋转以使新的切割面进入切割位置。 根据本发明制造的工具迫使螺柱组件回到沉孔中。

公开(公告)号：US4606108A

公开(公告)日：1986-08-19

申请号：US803326

申请日：1985-12-02

申请人： Kenneth Davis

发明人： Kenneth Davis

IPC分类号： B23P19/02 ,  B25B27/02 ,  E21B10/56 ,  E21B10/573 ,  E21B10/62 ,  E21B10/633 ,  B23P6/00 ,  B26D1/00

CPC分类号： E21B10/573 ,  B23P19/025 ,  B25B27/02 ,  E21B10/633 ,  Y10T29/49721 ,  Y10T29/49822 ,  Y10T407/1912 ,  Y10T407/2212

摘要： A drill bit has a formation engaging face from which there extends a plurality of stud assemblies having a diamond cutting face thereon. Each of the stud assemblies are mounted within a socket by a close tolerance press fit. A reduced diameter rearwardly extending passageway leads from the rear of the socket back up to the face of the bit so that when the diamond face of the stud assembly becomes worn, a tool can be extended through the passageway to the rear of the socket and into contact with the stud assembly to force the stud assembly from the socket. The stud assembly is then rotated a few degrees to present a new cutting edge to the formation, and pressed back into the socket, thereby returning the drill bit to like new condition.

摘要翻译： 钻头具有形成接合面，在其上延伸有多个在其上具有金刚石切割面的螺柱组件。 每个螺柱组件通过紧公差压配合安装在插座内。 缩径的向后延伸的通道从插座的后部引导回到钻头的表面，使得当螺柱组件的金刚石面磨损时，工具可以延伸通过通道到插座的后部并进入 与螺栓组件接触以从插座强制螺柱组件。 然后将螺柱组件旋转几度以向地层提供新的切割边缘，并且压回到插座中，从而使钻头返回到新的状态。