地質与勘探58年第23期介紹的自动导桿方法,是我队初步試用的,通过一段时間的使用,发现尚存在很多问题和缺点,主要的有以下几方面: (一)卡销在使用中经常发生卡不住的現象,对此改进多次,起初认为弹簧软,力量不够,經更換了弹簧(经沾火),但仍未杜絕卡不住之弊。根据实际使用情況分析,利用卡銷方式卡鑽桿,因为鑽桿的卡槽很淺(4～5毫米),加之卡銷与鑽桿卡槽結合时接触面很小,所以井浅时,需要加很大的压力,而鑽具受到强烈的震动,致使弹簧失效,卡銷缩回。而在井 The method of automatic guide rod introduced by Geology and Prospecting, No.58, is a preliminary trial of our team. After a period of use, we found many problems and shortcomings. There are mainly the following aspects: (1) The phenomenon of frequent use of the stuck, improved several times, at first thought the spring soft, not enough strength, after the replacement of the spring (through the fire), but still not put an end to the disadvantages. According to the actual usage analysis, the use of bayonet card drill pipe, drill pipe because of the card slot is very shallow (4 ~ 5 mm), combined with the kerosene and drill chuck slot when the contact surface is very small, so the well, you need Add a lot of pressure, and the drill was a strong shock, resulting in failure of the spring, the latch retracted. And in the well