公开(公告)号：US4696354A

公开(公告)日：1987-09-29

申请号：US880214

申请日：1986-06-30

申请人： William W. King ,  Edmund C. Houle, Jr.

发明人： William W. King ,  Edmund C. Houle, Jr.

IPC分类号： E21B10/56 ,  E21B10/567 ,  E21B10/60

CPC分类号： E21B10/567 ,  E21B10/602

摘要： A bit is shown for use in drilling earthen formations which includes a body having a bit face on one end and a shank on the opposite end which is connected in the drill string. The bit body has a tubular bore which communicates with an interior bore of the drill string for circulation of fluids. The bit face increases in external diameter between a nose and a gage region of the bit. A fluid opening communicates the bit face with the tubular bore for circulating fluid to the bit face. A plurality of fluid courses are disposed on the bit body, the fluid courses becoming ever wider and ever deeper along their entire disposition from their lowermost incorporation through the gage region thereof.

摘要翻译： 示出了用于钻井土层的一点，其包括在一端具有钻头面的主体和在钻柱中连接的相对端上的柄。 钻头体具有与钻柱的内孔连通以便流体循环的管状孔。 钻头的头部和刀头区域之间的外径增加。 流体开口将钻头面与管状孔连通，以将流体循环到钻头面。 多个流体流道设置在钻头体上，流体流道沿着它们的最下部​​并入通过其表面区域沿其整个布置变得越来越深。