格兰的作用是用来配合盘根填料密封井口,防止井口原油泄露造成污染及损失,更换盘根填料是采油工一项经常性的维护工作。原先在更换盘根填料时,卸下的盘根盒、格兰需卡托在光杆上,费时费力,容易松脱下落,更换存在安全隐患。改进后的格兰具有结构简单,更换操作方便,安全系数高的特点,在现场应用取得了较好的效果。 The role of Granland is to seal the wellhead with packing to prevent pollution and loss caused by leakage of crude oil in the well head. The replacement of packing is a regular maintenance work for oil recovery workers. The original replacement packing packing, packing box removed, Grand need Cato light pole, time-consuming and laborious, easy to fall off, there is a security risk replacement. The improved Glan has the advantages of simple structure, convenient operation and high safety factor, and has achieved good results in the field.