Since the deflection of the traversing casing influences the operation of pipe laying at a great degree, a direction controlling system of the drill bit on the horizontal auger is developed.

• 鉴于在役套管螺旋钻机均无控向装置,管线敷设中常因穿越套管偏斜而无法施工的状况,研制了套管螺旋钻机钻头控向系统。