[EN] METHOD AND APPARATUS FOR EXPLORATION DRILLING<br/>[FR] PROCEDE ET APPAREIL UTILISES EN FORAGE D'EXPLORATION
申请人:SASOL MINING PROPRIETARY LIMIT
公开号:WO2000009857A1
公开(公告)日:2000-02-24
The invention provides a method of drilling and a drilling apparatus and drilling apparatus set. The apparatus includes a drill rig (12), a flexible string (18) of drill rods connected to the rig, a steerable downhole motor (22) connected to the string, a drill bit (24) connected to the motor (20) and monitoring means for detecting changes in the rate of movement of the drill bit. The method involves steering the motor to cause the bit to drill and at least partly curved borehole, the drilling being monitored to detect changes in the drilling which are indicative of discontinuities in sub-surface formations.
本发明提供了一种钻探方法和钻探设备及钻探设备组。该设备包括钻机(12),连接到钻机的钻杆的柔性管(18),连接到管子的可操纵的井下电动机(22),连接到电机(20)的钻头(24)和监测手段,用于检测钻头运动速率的变化。该方法涉及操纵电机,使钻头钻探至少部分曲线井孔,监测钻探以检测钻探中的变化,这些变化表明井下地层的不连续性。