XQB89/8A 型液壓動力鉗是在油田修井作業中，用來快速上卸管桿螺扣的一種閉口式動力鉗，陸地油田、海洋油田均可使用，適用于Ф60~89mm（2 3/8＂~3 1/2＂）規格范圍內的油管和小鉆桿接頭的安裝與拆卸。與同類型的其它動力鉗相比，本產品具有以下特點：
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.