In addition to the fleetness connects single root, can also use at salvage the homework, search direction or demands the slow the artesian well tool that turn last, and drill the size rat hole use.

• 方钻杆旋扣器是在钻井过程中利用液压或气压做动力，驱动方钻杆旋转，与小鼠洞卡钳配合使用，因而自动完成接单根的一种专用装置。