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从实用效果看,“二八一”定向活楔子优于一般死楔子和偏重定向活楔子,但在定向方法上,还有一定问题,为此我们作了一些改进,效果显著,现将改进情况简介于后.过去“二八一”活楔子的定向,是通过一根导线连接铜质重锤,井外串接一个灯泡与外电源接通,井内靠导向管一壁装一绝缘定向管,重锤在钻杆内下入.因钻孔有一定程度的倾斜,重锤凭其自重沿着导向管下壁滑动.在楔面未置于预想方向时,重锤与定向管方向不一致,不能通过,此时重锤与钻具接通,灯泡较亮;楔面置于预定位置后,
From the practical effect, “281” directional live wedge is better than the general dead wedge and directional wedges, but in the directional method, there are some problems, for which we made some improvements, the effect is significant, now In the past, the orientation of the “281” live wedge was connected to a copper weight by a wire, a light bulb was connected in series with the external power source, a wall of the guide tube was installed in the well Insulation oriented tube, the hammer under the drill pipe into the inside.Because the drilling has a certain degree of tilt, the weight by its own weight sliding along the guide tube wall.When the wedge is not placed in the desired direction, the weight and the orientation of the tube The direction of inconsistency, can not be passed, then hammer and drill connected, the light bulb bright; wedge surface placed in the predetermined location,