公开(公告)号：US3743037A

公开(公告)日：1973-07-03

申请号：US3743037D

申请日：1971-04-22

申请人： BULAKH G ,  VYSOTSKY V

发明人： BULAKH G ,  VYSOTSKY V

IPC分类号： E21B10/28 ,  E21B9/24

CPC分类号： E21B10/28

摘要： A rig for rotary drilling, in which a pilot drilling tool is disposed coaxially relative to the drilling string and side drilling tools are radially displaced with respect to the pilot drilling tool, with the side tools rotating freely and partially overlapping the pilot tool drilling tool and disposed above the latter in a body which is rigidly connected to the drilling string.

摘要翻译： 一种用于旋转钻井的钻机，其中相对于钻柱同轴设置的先导钻井工具和侧钻具相对于先导钻削工具径向移位，侧铣刀自由旋转并部分地与导向钻具钻具相交， 设置在刚性连接到钻柱上的主体中。