Wellhead hydraulic lifting device is driven by hydraulic power, which is used for well jam release when blowout accident occurrs during workover treatment. It has the following features.

• 井口液压举升装置是当油田大修作业发生卡钻时，用于解卡的一种专用设备。该设备由液压动力驱动，操作简单，是目前油田大修解卡最理想的装备。具有以下特点：