卸接钻具是钻进工序之一。在坚硬岩层中钻进或其它种种原因,促使钻具接触很紧不易卸开,这不仅直接影响卸的时间,而且在钻具不易卸开时容易损坏工具。根据这种情况,我队设计了一种,“座式夹钳”,来代替牙钳和自由钳配钻具,经过几年的实践证明, Unloading drilling is one of the drilling process. Drilling or other reasons in hard rock formations can make the drill contact very tight and difficult to disassemble, which not only directly affects the unloading time but also easily damages the tool when the drill tool is not easy to be unloaded. According to this situation, my team designed a “seat clamp” instead of a pair of calipers and free-fit drill, after years of practice,