XQB89/8A 型液压动力钳是在油田修井作业中，用来快速上卸管杆螺扣的一种闭口式动力钳，陆地油田、海洋油田均可使用，适用于Ф60~89mm（2 3/8＂~3 1/2＂）规格范围内的油管和小钻杆接头的安装与拆卸。与同类型的其它动力钳相比，本产品具有以下特点：
Model XQB89/8A hydraulic power tong is a closed mouth power tong, which is used for make-up and break-out of tubing (specifications range from Φ60-89mm or 2 3/8"to 3 1/2") and small drill pipe joints in oilfield well and ocean well service, comparing with other similar power tongs, it has the following features.
It is unnecessary to change any parts during clamping the application pipe range.
All the moving parts is enclosed in the bowels of transmission case, so it is not easy to be damaged.
The mechanism structure is simple for the transmission is adopted vertical cylinder gear, so it is easy to be maintenance.
The clamping performance is reliable, and it also has a longer life.
The master tong and the backup tong are driven by hydraulic. There is no need to provide compressed air.