钻探施工中,为了排除井故,有时须先反回井内钻杆.反杆这一工作,劳动强度大,而且容易伤人.为此,我队采用了下面几种器具.1.拉轮钢绳反杆器结构如图1.操作方法:下反丝钻杆,对好矢锥,使钻杆接头刚好在孔口.接上反杆器,抽出四方活动套,缠绕钢绳(20多圈),再装好四方活动套,用升降机缓慢提动,此时钻杆反转,使 Drilling construction, in order to exclude the well, and sometimes need to first back the drill pipe well. Anti-bar this work, labor-intensive, and easy to hurt. To this end, I use the following types of equipment. Rope anti-rod structure shown in Figure 1. Method of operation: the next anti-wire drill rod, the right-angle cone, so that the drill pipe joints just in the mouth. Connect the anti-bar, pull out the Quartet activities, winding rope ), And then install the Quartet activity sets, slowly lift with a lift, then drill pipe reversed, so