公开(公告)号：US20140182938A1

公开(公告)日：2014-07-03

申请号：US14105867

申请日：2013-12-13

申请人： Smith International, Inc.

发明人： Xiaoge Gan ,  Lokesh Bhatia ,  Kevin E. Harrington ,  Robert H. Slaughter, JR.

IPC分类号： E21B1/02 ,  E21B4/14

CPC分类号： E21B4/14 ,  Y10T29/49826

摘要： A percussion drilling assembly includes a housing with a hammer bit disposed in the lower end portion thereof and configured to move longitudinally within the housing. The hammer bit includes an annular bit shank having a bit strike face and a cutting structure at a lower end portion thereof. An annular piston having a piston strike face arranged and designed to strike the bit strike face is also disposed in the housing. At least one of the bit strike face and the piston strike face has a toroidal curvature profile. A method includes one or more of lowering the percussion drilling assembly into a borehole, engaging the cutting structure with a formation, and impacting the bit strike face of the annular bit shank with the piston strike face of the annular piston.

摘要翻译： 敲击钻探组件包括具有设置在其下端部分中的锤头的壳体，并且构造成在壳体内纵向移动。 锤头包括在其下端部分具有钻头打击面和切割结构的环形钻头柄。 具有布置和设计成撞击钻头打击面的活塞冲击面的环形活塞也设置在壳体中。 钻头表面和活塞冲击面中的至少一个具有环形曲率轮廓。 一种方法包括将冲击钻井组件降低到钻孔中的一种或多种，​​将切割结构与地层接合，并且与环形活塞的活塞冲击面冲击环形钻头柄的钻头面。

公开(公告)号：US09416593B2

公开(公告)日：2016-08-16

申请号：US14105867

申请日：2013-12-13

申请人： Smith International, Inc.

发明人： Xiaoge Gan ,  Lokesh Bhatia ,  Kevin E. Harrington ,  Robert H. Slaughter, Jr.

IPC分类号： E21B4/14

CPC分类号： E21B4/14 ,  Y10T29/49826

摘要： A percussion drilling assembly includes a housing with a hammer bit disposed in the lower end portion thereof and configured to move longitudinally within the housing. The hammer bit includes an annular bit shank having a bit strike face and a cutting structure at a lower end portion thereof. An annular piston having a piston strike face arranged and designed to strike the bit strike face is also disposed in the housing. At least one of the bit strike face and the piston strike face has a toroidal curvature profile. A method includes one or more of lowering the percussion drilling assembly into a borehole, engaging the cutting structure with a formation, and impacting the bit strike face of the annular bit shank with the piston strike face of the annular piston.

摘要翻译： 敲击钻探组件包括具有设置在其下端部分中的锤头的壳体，并且构造成在壳体内纵向移动。 锤头包括在其下端部分具有钻头打击面和切割结构的环形钻头柄。 具有布置和设计成撞击钻头打击面的活塞冲击面的环形活塞也设置在壳体中。 钻头表面和活塞冲击面中的至少一个具有环形曲率轮廓。 一种方法包括将冲击钻井组件降低到钻孔中的一种或多种，​​将切割结构与地层接合，并且与环形活塞的活塞冲击面冲击环形钻头柄的钻头面。