在钻具升降过程中,为了防止由于姊妹钩受到碰击串动脱环,而产生的跑管事故,我队301机将姊妹钩的构造,进行了改裝.改裝的情况,见图1所示.其方法是在一个钩的侧面加制一个活动卡肖(如图2所示).在肖上用一 During drilling and lowering of the drill pipe, in order to prevent running accidents caused by knocking and knocking off of the sister hooks, our team’s 301 machine will have a sister hook structure and have been modified. The modified case is shown in Figure 1. The method is to add an active card shark on the side of a hook (as shown in Figure 2). Use a