在油井维修起下管柱过程中,从井架天车下来的游动钢丝绳缠绕到拖拉机式通井机的起重滚筒上,有时钢丝绳会拉翻井架。为了避免发生此类事故,通常都在井架底座大染或混凝土基座上装设一个导向滑轮。 现有的滑轮有许多缺点。附图所示为苏联钻井工艺研究所研制的新型导向滑轮,它包括 During the string maintenance from well maintenance, the roving rope down from the derrick crane is wound onto the lifting drum of a tractor-type well-passing machine, and sometimes the rope can pull over the derrick. To avoid such accidents, a guide pulley is usually installed on the derrick base or concrete base. The existing pulleys have many disadvantages. The figure shows a new guide pulley developed by the Soviet Institute of Drilling Technology, which includes